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以实际刊发为准
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LI Fangyuan, LUO Zhongqiu, ZHOU Xintao, CAI Xiunan, SHANG Bo
2025,42(5)
Abstract:
Calcium-based material has been considered as a most promising high-temperature carbon capture material due to its high carbon dioxide absorption capacity, simple preparation process, and calcium cycling characteristics. Using calcium-based solid wastes as or constructing calcium-based adsorbents can not only save natural resources, but also achieve the utilization of industrial solid wastes, which is accordant with environmental protection concepts of “treating waste with waste and treating pollution with waste”. Firstly, the theoretical carbon sequestration potential of six common industrial calcium-based solid wastes was analyzed using Huntzinger and thermodynamics. Secondly, the methods for direct carbonization of these waste residues and the preparation of derived calcium-based adsorbents, as well as the existing problems and improvement directions, were classified and summarized. Various methods and mechanisms for improving the uptake capacity of calcium-based adsorbents were also summarized. Finally, the essence of calcium cycling was explained from the perspectives of gas diffusion, ion migration, and adsorbent’ structure stability. It was pointed out that oxygen vacancies and hollow sphere structures have great potential in improving adsorption performance, and the problems and improvement directions faced by industrial calcium-based solid waste in industrial application were pointed out.
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LI Chi, GUO Jixiang, WANG Li, CHEN Xiang-wei, XUE Peng-cheng, ZHANG Wen-long
2025,42(5)
Abstract:
In recent years, with the development of carbon nanomaterials, the synthesis and application of carbon quantum dots (CQDs) have made remarkable progress.CQDs, as a kind of green, safe and non-toxic carbon nanomaterials, show great potential for application in the petroleum field. This review firstly describes the relevant background and synthesis methods for the development of CQDs, analyzes their application potential in the petroleum field, especially the research progress and technological achievements in the areas of high efficiency oil repulsion, viscosity reduction of thick oil, oil-water separation, corrosion and scale inhibition, etc., and elaborates on the modification strategies regarding the problems and deficiencies of the CQDs in the petroleum field application, introduces the impact of different modification techniques on the modulation of their properties with the current research developments, summarizes the challenges faced by the application of CQDs in the petroleum field, and looks forward to the future research direction, i.e., optimizing the synthesis method and using the combined strategy to achieve rapid and stable mass production of CQDs; in addition, in-depth study of the mechanism of action, upgrading the surface modification technology, adopting intelligent responsive polymers for the modification or realizing the multielemental doping, etc., to enhance the usability and stability of CQDs, and make full use of their excellent properties to improve the performance and stability of CQDs, as well as to improve the performance of CQDs. In addition, it is necessary to study the mechanism of action, enhance the surface modification technology, adopt intelligent responsive polymers for modification, or realize multi-element doping to improve the usability and stability of CQDs, and make full use of their excellent properties to broaden the scope of application, so as to meet the different needs of the petroleum industry.
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Zhao Bo, An Yu, Zeng Jijun, Tang Xiaobo, Han Sheng, Yang Zhiqiang, Zhang Wei, Lu Jian, Tang Nian, Li Li, Sun Dongwei
2025,42(5)
Abstract:
Immersion refrigeration has become the key to the stable operation of high-performance ICT equipment, and fluorinated coolant is regarded as one of the most promising media due to its excellent insulation properties, good fluidity, and strong material compatibility. Since the existing coolant belongs to PFAS, a "permanent chemical" of great concern in the world, opportunities and challenges coexist in the field of coolant manufacturing. This paper reviews the development process of fluorinated coolant and the preparation method of existing coolant, pointing out the existing performance defects such as dielectric constant, thermal conductivity, and latent heat of evaporation. Based on the experience of coolant development, the preliminary idea of a new molecular structure is expounded, and the development idea of material genetic engineering is proposed, in order to provide a useful reference for the source innovation of fluorinated immersion coolant.
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QIAN Yu-lan, CUI Hai-long, FENG Yu-tao, ZHU Jun-yang, XIONG Xiao-qing
2025,42(5)
Abstract:
Sulfites and bisulfites are widely used in textile printing and dyeing, pulp and paper making, food, and healthcare, which causes the enrichment of sulfite ions (SO32?) and bisulfite ions (HSO3?) in the environment. Meanwhile, endogenous sulfur dioxide (SO2) can easily merge with water and transform into SO32?/HSO3? under physiological conditions. SO32?/HSO3? can replace the biological function of SO2, and the abnormal levels can lead to a series of physiological diseases. Therefore, the detection of environmental and endogenous SO32?/HSO3? content is particularly important. Based on the reaction mechanisms such as aldehyde nucleophilic addition, Michael addition, double bond addition, and deprotection, researchers have designed and synthesized a large number of SO32?/HSO3? fluorescent probes. This article summarizes the research progress of SO32?/HSO3? fluorescent probes. Firstly, the design strategy, sensing performance, detection mechanism, and application of probes are discussed in detail from multiple aspects, such as response time, detection limit, probe type, and detection environment. The performance data of different fluorescent probes are visually compared, and meanwhile, the differences in the structures of fluorescent probes are summarized as the reasons for the differences in their detection results for SO32?/HSO3?. Then, the mechanism of reaction, design principles, and performance optimization techniques of SO32?/HSO3? probes are deeply explored. Finally, the future design direction of SO32?/HSO3? fluorescent probes are looked forward to: the fluorescent probes with high sensitivity, high selectivity, and fast response characteristics, multifunctional fluorescent probes that can adapt to the complexity requirements of detection environments and simultaneously detect multiple ions or biomolecules, and the fluorescent probes that combine with artificial intelligence technology to achieve automated and intelligent detection and analysis.
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LIU Yali, HAN Le, KANG Xiaorong, LIU Yajun, Jing Zhaoqian
2025,42(5)
Abstract:
The discharge of organic pollutants in wastewater poses a threat to the ecological environment and human health, and membrane separation is one of the simplest and most effective treatment technologies. In recent years, MXene has become a fundamental unit for constructing high-performance membranes due to its unique "accordion" layered structure and its structural controllability. Meanwhile, various physical and chemical methods are used to precisely regulate and optimize the design of interlayer channels, in order to further enhance the permeability, selectivity, and stability of MXene membranes. In this article, bibliometrics was used to statistically analyze the research progress of MXene membranes at home and abroad. The evolution of MXene membrane structure was encapsulated, and the regulatory strategies for MXene membrane structure, including intercalation, cross-linking, self-assembly, and surface modification, were elaborated in detail. The separation efficiency and mechanism of MXene membrane for typical organic pollutants such as dyes and antibiotics are summarized and analyzed. Finally, based on the current research results, it was proposed to conduct in-depth research from the aspects of development, engineering application, and computer simulation, providing theoretical basis and technical support for the practical application of MXene membranes.
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Lan Tianyu, Zhang ?Zuoyuan, Li? Cuiqin, Zang Yu, Zu Liwu, Wang Jun
2025,42(5)
Abstract:
Dendritic metal catalysts are prepared by loading metal active centers on dendritic macro molecules. They not only have the unique structure of dendritic macro molecules but also have the functional properties of metal complexes, combining the features of both homogeneous and heterogeneous catalytic systems. In catalytic reactions, they have a synergistic effect, showing high catalytic activity and good stability. This paper first introduces the development and types of dendritic large molecules, then focuses on reviewing the research progress of dendritic metal catalysts in various catalytic reaction types (Kharasch addition, Diels-Alder, Stille reaction, allylic alkylation, hydrogenation of olefins, copolymerization of olefins, Knoevenagel condensation, Michael addition, polymerization of olefins), explaining the reasons for various dendritic effects, and discussing the future development directions of dendritic metal catalysts.
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JIA Yuyao, JIANG Qinyao, YANG Shaozhe, WU Rong, BAI Wei, TANG Anbin
2025,42(5)
Abstract:
In recent years, phosphonitrile are emerging as a new type of flame retardant, which is rich in nitrogen and phosphorus, and has high flame-retardant efficiency. The chlorine atom on Hachlorocyclotriphosphonitrile has high reactivity, and it can react with benzene ring and other groups to improve the compatibility with the base material. Chlorine atoms can also react with groups containing other flame-retardant elements (such as Si, S, etc.) to improve flame retardant efficiency through synergistic action. In addition, phosphoronitrile with the active group at the end can copolymerize with the base material to form a highly crosslinked structure, so as to reduce the degradation of the thermodynamic properties of the base material. Cyclophosphonitrile can also be used as a framework for the synthesis of micro-nanomaterials because of the multiple reactive sites on its single molecule. Recent studies have shown a new direction, introducing some groups with special properties at the active site of cyclotriphosphonitrile, which can provide phosphonitrile compounds with other properties in addition to flame retardant properties, such as water absorption resistance, insulation properties, etc. Based on the structure of phosphonitrile, this paper has discussed the effects of the structure of phosphonitrile on flame retardancy and flame retardancy mechanism, and has made a preliminary prediction on the development direction of phosphonitrile compounds in the future.
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ZHU Xiaotong, CAO Junyang, ZHANG Rongyue, JIA Hongxia, WANG Yucong, QIAO Juan
2025,42(5)
Abstract:
Persistent luminescent nanoparticles (PLNPs) are a kind of nanomaterials which can continue to emit light after stopping external excitation. This unique optical property of PLNPs allows their application in luminescence detection without constant external excitation. Moreover, it can reluminesce under the excitation of appropriate near-infrared light (NIR). This excellent optical property enables it to detect persistent luminescence without in-situ continuous excitation, so as to avoid the interference of self-fluorescence and scattered light from organisms and tissues, thus significantly improving the sensitivity of biological analysis. In order to make full use of the advantages of PLNPs in biological applications, it is becoming more and more important to design PLNPs-based nanoprobes and general strategies for connecting PLNPs with bioactive molecules / biomarkers. The use of FRET system is the most suitable strategy for the preparation of PLNPs-based nanoprobes, which solves the problem of high background signal in traditional fluorescence sensing. In this review, we summarize the synthesis methods of PLNPs and systematically introduce the research progress of PLNPs in biomedicine and food contamination detection, focusing on the application of PLNPs in bioimaging and biosensing. The research direction of PLNPs nanoprobes in the diagnosis and treatment of tumors was prospected.
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LIU Ye, ZHAO Qian, YU Yanfang, ZHEN Yinzhao, GAO Bonan, WANG Shirong, LI Xianggao, LIU Hongli
2025,42(5)
Abstract:
Alumina (Al2O3) and silica (SiO2) were deposited on the surface of anatase titanium dioxide (TiO2) particles by chemical reactive deposition. Infrared absorption spectrum, X-ray fluorescence spectroscopy, transmission electron microscope, specific surface area test etc were used to characterize the morphology and structure properties of TiO2 particles. The results show that Al2O3, SiO2 and composite shell were deposited on the surface of TiO2 particles, forming porous shell, which improves the specific surface area, surface hydroxyl content and charge capacity of TiO2 particles. Solsperse17000 was used as surfactant, and the dispersion stability of particles in liquid medium was improved through its solvation chain effect. The white reflectivity of TiO2@Al2@Si2 particles with a 15% mass concentration in toluene, dodecylbenzene, tetrachloroethylene, cyclohexane and Isopar L can reach 49.11%, 49.11%, 48.18%, 53.91% and 54.43% respectively, which is 4%~8% higher than that of raw TiO2 material. Apply TiO2@Al2@Si2 particles into electrophoretic display devices, the white reflectivity can reach 40.47% and contrast ratio can reach 59.51.
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QI Guanjie, WU Tao, SONG Liyang, LI Chengchen, ZHANG Zinuo, ZHANG Ziyan, PU Dianhui, ZHANG Meng, YIN Yunjie, WANG Chao-xia
2025,42(5)
Abstract:
In order to solve the problem of slow heat release rate and difficult temperature control of azobenzene photosensitive molecules, a variety of azobenzene phase change composites with solid-liquid phase change function in different proportions were prepared. Among them, the azobenzene phase-change material prepared in a 3:7 ratio exhibited the highest phase transition point, reaching 73.8°C. These azobenzene phase-change materials demonstrated good cyclic stability, with no significant attenuation in absorbance after 50 cycles of alternating UV and green light excitation. Additionally, they exhibited high energy utilization efficiency, with a minimal enthalpy change of only 11.1 J/g during melting and solidification, enabling maximum energy release. Moreover, the azobenzene phase-change materials showed excellent photothermal conversion efficiency, with a maximum temperature increase of 19°C above room temperature after 500s of exposure to 200 W/m2 xenon lamp light. These materials possess the characteristics of rapid heat release rate and controllable phase transition points, making them promising for a wide range of applications in human thermal management. They can efficiently store the released energy under light stimulation, facilitating photothermal energy conversion.
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SHAO Xinxiang, ZHOU Weihua, ZOU Jiaxin, CHE Siying
2025,42(5)
Abstract:
A coumarin fluorescent probe [HDQ][P66614] were synthesized from Acid-base deprotonation reaction of 3-Chloro-7-hydroxy-4-methylcoumarin (HDQ) and quaternary phosphorin[P66614][OH] as raw materials, and characterized by 1HNMR, FTIR. Based on fluorescence spectroscopy, the detection sensitivity, selectivity and anti-interference experiments were carried out to investigate the low detection limit (LOD), specificity and anti-metal cation interference of Fe3+ of the probe [HDQ][P66614], and the detection mechanism was analyzed, and the application of the test probe [HDQ][P66614] for the detection of Fe3+ in actual samples was investigated. The results showed that HDQ, as a fluorescent signal group and a specific recognition group, complexed with Fe3+ at a ratio of 1∶4 to form a non-fluorescent complex. In the concentration range of 60~600 μmol/L, Fe3+ has a good linear relationship with the fluorescence intensity of probe [HDQ][P66614] solution, LOD=0.6 μmol/L. The probe [HDQ][P66614] was simple to synthesize, the response time of Fe3+ was 10 s, and the pH=2~12 range, the probe [HDQ][P66614] had a fluorescence quenching response to Fe3+, quenching is more pronounced when the pH is farther away from 7. The probe [HDQ] [P66614] showed specificity for the detection of Fe3+ and anti-interference ability for ten
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WANG Ying-feng, HONG Da-wei, DONG Shuo, LIU Xu-yao, HU Huang, YIN Mao-li
2025,42(5)
Abstract:
In order to develop suitable food packaging films to address food contamination by foodborne pathogens, 1,3-dichloro-5,5-dimethylhydantoin (DCDMH) and curcumin were used as additives. Glycerol was employed as an antifoaming agent, and chitosan was used as the substrate. The multifunctional chitosan-based films with pH-response and antibacterial properties were prepared using the casting process. SEM and FT-IR were employed to analyze the morphology and chemical structure of chitosan composite films. Based on numerous tests, including mechanical, transmission, water vapor permeability, moisture content, water solubility, pH response, and antibacterial properties (with or without illumination), the impact of curcumin and DCDMH on the physical, pH responsiveness, and antimicrobial efficacy of chitosan composite films was investigated. The results showed that DCDMH, curcumin and chitosan were mixed uniformly, resulting in a tight membrane structure. The thickness of CS-Cur-I (mcurcumin: mDCDMH, 1:1) and CS-Cur-Ⅱ (mcurcumin: mDCDMH, 3:7) was slightly enhanced (0.071 mm), and the breaking forces (40.92 N, and 54.46 N) were simultaneously increased. The composite films showed visible pH-responsive properties under different pH conditions. As the environmental pH increases, the color of CS-Cur-I deepens continuously, shifting from yellow to reddish-brown. The chitosan composite films showed good antibacterial with or without irradiation, and 100% of S. aureus (7.00 logs) and E. coli (7.00 logs) were inactivated within 30 min.
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SONG Qiao-ying, Baoyi Zhao, Ziqing Liu
2025,42(5)
Abstract:
Objective: To investigate the extraction process of tea polyphenols from Xinyang Maojian with ultrasound-assisted deep eutectic solvent (DES), the antioxidant activity in vitro and in vivo and its ability to regulate intestinal flora. Methods: The single factor orthogonal method was used to optimize the extraction process of polyphenols from Xinyang Maojian tea with ultrasound-assisted DES. The scavenging ability of 1, 1-diphenyl-2-trinitrophenylhydrazine (DPPH), hydroxyl radicals and 2, 2-diazine-bis (3-ethyl-benzothiazole-6-sulfonic acid) diamiammonium salts (ABTS) was used as the antioxidant method in vitro. At the same time, the antioxidant activity of tea polyphenols at cellular level was determined by cellular antioxidant activity (CAA) method. In addition, 60 healthy male C57BL/6 mice were randomly divided into 6 groups: blank group (NC), model group (MC), positive control group (PC), tea polyphenol low dose group (LTP, 5.0 mg/kg bw), tea polyphenol medium dose group (MTP, 10.0 mg/kg bw) and tea polyphenol high dose group (HTP, 20.0 mg/kg bw). Except the NC group, the other mice were intraperitoneally injected with 50 mg/kg bw D-galactose to establish the aging model. After administration, the liver and kidney organ index, serum biochemical index, serum immune index and serum oxidation index were measured. Moreover, 16S rRNA gene high-throughput sequencing was used to cluster and analyze the diversity of cecum contents in each group. Results: The optimal extraction process of polyphenols from Xinyang Maojian tea was as follows: DES choline chloride: acetic acid 1:3, moisture content 30%, ultrasonic temperature 40℃, ultrasonic time 25 min, ultrasonic power 115 W, solid-liquid ratio 1:35 (g:mL). In addition, studies on antioxidant activity in vitro showed that when the concentration of tea polyphenols was 6g/L, the scavenging rates of DPPH free radicals, hydroxyl free radicals and ABTS free radicals were 59.23%, 60.49% and 41.65%, respectively. CAA analysis showed that when the concentration of tea polyphenols was 5g/L, CCA value could reach 63.2. The results of animal experiments showed that Xinyang Maojian tea polyphenols can significantly reduce the levels of low density lipoprotein cholesterol (LDL-C), aspartate aminotransferase (AST) and glutamic-pyruvic aminotransferase (ALT) in serum, and increase the level of high density lipoprotein cholesterol (HDL-C), which has a certain protective effect on the organs of aging mice. Moreover, tea polyphenols can increase the levels of pro-inflammatory factors interleukin-12 (IL-12), interleukin-6 (IL-6) and tumor necrosis factor-α (TNF-α), and reduce the levels of anti-inflammatory factor interleukin-10 (IL-10), so as to improve the inflammatory response of aging mice. Tea polyphenols also increased the activity of glutathione peroxidase (GSH-Px) and superoxide dismutase (SOD) in serum, while decreased the level of malondialdehyde (MDA), thereby increasing the antioxidant capacity of mice. Intestinal flora analysis showed that tea polyphenols can change the abundance and diversity of intestinal flora, especially increase the abundance of beneficial bacteria Lactobacillus, Candidatus_Saccharimonas and Corynebacterium, and decreased the abundance of harmful bacteria Desulfovibrio and Muribaculaceae, thereby improving the disorder of intestinal flora in D-galactose-induced aging mice, and thus effectively regulating the normal operation of metabolic pathways in mice. Conclusion: This study provides a green and efficient method for extracting polyphenols from Xinyang Maojian tea, and the polyphenols have certain antioxidant activity and the ability to regulate intestinal flora, aiming to lay a foundation for further research and industrialization of Xinyang Maojian tea.
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REN wen-ting, LIU Shu-yu, HUA Junfeng, HAO Si-yu, FENG Jia-jia, WAN Chao
2025,42(5)
Abstract:
Ammonium borane (NH3BH3, AB), as the simplest B-N compound, has a simple structure, a light molecular weight of only 30.7 g/mol, and a hydrogen storage capacity of up to 19.6 wt%, making it one of the most ideal liquid phase hydrogen storage materials at present.The key to achieving efficient hydrogen production is the preparation of catalysts with high selectivity and stability.This article adopts a solvothermal method to synthesize copper oxide nanosheets (CuO-Ns) with nano defects in a high concentration alkaline solution, and explores the preparation of catalysts with different morphologies by changing the hydrothermal temperature and time during the preparation process.The investigation results show that when the hydrothermal temperature is 373 K and the hydrothermal time is 12 hours, the morphology of the catalyst is nanosheets, with the best catalytic activity and the highest reaction conversion frequency (TOF) value. At this time, the TOF value of the catalyst is 115.21 h-1, and the AB hydrogen production rate is positively correlated with the AB concentration and catalyst concentration.
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LIU Qiu-ling, CHEN Yi, ZHANG Qian, LIU Shu-jun, LV Yun-kai, NIU Li-bo
2025,42(5)
Abstract:
A high efficiency nickel-based catalyst was developed for catalytic hydrogenation of furfural from biomass platform molecule to furfuryl alcohol in the absence of hydrogen. Three kinds of NiAl catalysts were prepared by different preparation methods, and the catalytic performance of the catalysts was investigated in the hydrogenation of furfural (FAL) to furfuryl alcohol (FOL). The physical and chemical properties of the catalysts were systematically studied by XRD, H2-TPR, TEM, NH3-TPR and XPS. The catalyst NiAl-HT prepared by hydrothermal method has larger specific surface area, abundant acidic sites, uniform distribution of Ni nanoparticles, and strong interaction between the Ni and AlOx supports, which results in the excellent catalytic performance of NiAl-HT in FAL transfer hydrogenation reaction. Under the optimized conditions, 140 oC , 0.5 Mpa nitrogen pressure and 60 min reaction time, the conversion of FAL and FOL selectivity are both as high as 99.9%.
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LI Rui-li, WANG Shuo-ying, FU Qi, REN Rui-bing, LI He-lin, ZHANG Jun-song
2025,42(5)
Abstract:
In order to explore the effect of drying methods on the drying characteristics and volatile composition of longan pulp, hot air drying (HAD), microwave vacuum drying (MVD) and vacuum freeze drying (VFD) were used to pretreat longan pulp. The classical thin-layer drying mathematical model was used to fit the drying process of longan pulp in three ways, and the volatile components of longan pulp treated by headspace solid-phase microextraction-gas chromatography-mass spectrometry (HS-SPME-GC-MS) combined with electronic nose sensor were detected and analyzed, cluster analysis and partial least squares discriminant analysis were used to clarify the differences in volatile components between samples and the characteristic volatile components. Results showed that the drying rate of the three drying methods is MVD> HAD>VFD. Weibull distribution model was found to be the most suitable mathematical model for predicting the drying characteristics of three drying methods; HAD and MVD had significant effects on the color of longan pulp（P＜0.05）, while VFD better maintained the original color; A total of 89 volatile components in 9 categories were detected before and after drying, 59 ,47, 52 and 52 volatile components were detected in fresh longan and longan treated with HAD, MVD and VFD, respectively. The nine volatile components were alcohols, olefins, esters, aldehydes, ketones, alkanes, aromatic hydrocarbons, heterocyclic and phenols, among which olefins and esters had the highest relative contents. Twenty-six characteristic volatile substances played an important role in distinguishing the four samples.
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LIU Lu-yao, WANG Bao-juan, LI Ming-jie, HU Jun-ping, YANG Jian-hua
2025,42(5)
Abstract:
Abstract: To investigate the synergistic effect of cistanche phenylethanol side (PhGs) and glabridin (Gla) on skin pigmentation, the mass ratio of PhGs and Gla was screened by in vitro tyrosinase inhibition experiment,1, 1-diphenyl-2-trinitrophenylhydrazine (DPPH) free radical scavenging experiment and 2, 2-diazo-bis (3-ethyl-benzothiazole-6-sulfonic acid) diamiammonium cation (ABTS+) free radical scavenging experiment. The UVB-induced cytopigmentation model of B16F10 was further established, and the inhibition of melanin production was evaluated using tyrosinase activity and melanin content as indexes. The inflammatory model of HaCaT cells induced by lipopolysaccharide (LPS) was established, and the anti-inflammatory effect of the drug was evaluated by inhibiting the release of interleukin-6 (IL-6) and tumor necrosis factor-α (TNF-α). The oxidative stress model of HaCaT cells induced by azodiisobuamidine hydrochloride (AAPH) was established, and the activity of superoxide dismutase (SOD) and catalase (CAT) was increased as indexes to evaluate the antioxidant effect of the drug. The optimal mass ratio of PhGs and Gla was selected by the above three cell models. The results showed that aqueous solutions of PhGs/Gla(1∶1), PhGs/Gla(5:1) and PhGs/Gla(10:1) prepared with m(PhGs):m(Gla) = 1:1, 5:1, 10:1 had good inhibitory and synergistic effects on tyrosinase activity and antioxidant activity. The inhibition rates of PhGs/Gla(1:1), PhGs/Gla(5:1) and PhGs/Gla(10:1) aqueous solutions at 0.4 mg/mL were 94.37%, 92.93% and 88.06%, respectively. The scavenging rates of DPPH free radicals were 89.44%, 88.72% and 88.10%, respectively. The scavenging rates of ABTS+ free radicals were 100.13%, 100.01% and 99.87%, respectively. When the mass concentration of PhGs/Gla was 25 μg/mL, PhGs/Gla(1:1), PhGs/Gla(5:1) and PhGs/Gla(10:1) aqueous solutions showed no cytotoxicity to B16F10 and HaCaT cells. The inhibition of tyrosinase activity in PhGs/Gla(1:1) aqueous solution was stronger (tyrosinase activity 23.80%), and the melanin content (30.90%) was significantly decreased. PhGs/Gla(1:1) aqueous solution had the best inhibition effect on IL-6 and TNF-α release, and the ability to enhance the activity of SOD and CAT. It showed good synergistic performance of the combination of PhGs and Gla, which was superior to single drug, and higher than PhGs/Gla(5:1) and PhGs/Gla(10:1) aqueous solution. The combination of PhGs and Gla plays a synergistic role in improving skin pigmentation by inhibiting melanin production, anti-inflammatory and antioxidant effects.
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CAI Yi-fei, 齐舵, WANG Tian-yu, ZHANG Yi-bo
2025,42(5)
Abstract:
Lithium-sulfur batteries, as a promising secondary battery system, have garnered extensive attention due to their exceptionally high energy density. However, the shuttle effect of soluble lithium polysulfides (LiPS) in traditional liquid electrolytes significantly impedes the development of lithium-sulfur batteries. In this work, a gel polymer electrolyte for lithium-sulphur batteries was prepared by using semi-in-situ polymerisation at lithium cathode with the advantage of the rapid and convenient characteristics of UV photoinitiated polymerization. This electrolyte is composed of a poly(ethylene glycol) dimethacrylate (PEGDMA) polymer crosslinked network combined with a PP separator, which can effectively suppress the shuttling of LiPS while maintaining a high ionic conductivity. Compared to the general preparation method of polymer gel electrolytes, batteries assembled using the semi-in-situ method at the lithium anode show significant improvements in the stability of the lithium anode and the retention of battery capacity. Further, the effect of monomer concentration on the performance of gel polymer electrolytes and lithium-sulfur batteries was investigated. The battery maintains a discharge specific capacity of 735.1mAh/g after 150 cycles at a 0.2 C rate, with a capacity retention rate reaching 80.8%.
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Huang zhi-liang, ZHOU Chang-lin, WU xinsheng, LI Jiang-guo, LUO Changjiang, WANG Lei, CAI Zhong
2025,42(5)
Abstract:
To achieve the green preparation of electrodes, a self-supporting electrode (SSE) was prepared using cotton fiber, nano-cellulose, sodium carboxymethyl cellulose, and copolyacrylate emulsion as adhesives, carbon black (CB) and carbon fiber (CF) as conductive agents, activated carbon (AC) as the active material, and water as the dispersant. To further enhance the conductivity of the electrode, a self-made CB conductive slurry was used to conductively strengthen the SSE, creating a conductively strengthened self-supporting electrode (CSSE). Characterization through SEM, BET nitrogen adsorption, contact angle, and electrochemical performance tests revealed that the SSE possesses a rich porous structure that allows rapid wetting by the electrolyte. The conductive strengthening effectively improved the conductivity of the electrode, resulting in abundant ionic microchannels and conductive pathways. To further boost the energy density of supercapacitors (SC), AC loaded with manganese dioxide (MnO2@AC) powder was prepared using a simple one-step aqueous carbon reduction method. Subsequently, a CSSE-MnO2 electrode was fabricated and paired with an AC electrode to assemble an asymmetric supercapacitor known as ASC (CSSE-MnO2//AC). Its electrochemical performance was evaluated in both neutral Na2SO4 electrolyte and redox electrolytes. The study found that the addition of redox-active electrolyte ammonium iron citrate to the neutral Na2SO4 electrolyte enables rapid and reversible redox reactions on the electrode surface, further enhancing the electrochemical performance of the ASC within a voltage window of 2.0～2.4 V. The assembled ASC exhibited exceptional areal capacitance (1.5 F/cm2 at a current density of 3～11 mA/cm2), a wide operating voltage window (2.0～2.4 V), satisfactory rate capability (1.2 F/cm2 at a current density of 84 mA/cm2), and outstanding cycling stability (maintaining 80% of its initial capacity after 10,000 cycles at 2 A/g). It achieved a remarkable energy density of 37.6 Wh/kg at a power density of 300 W/kg. The simple and cost-effective preparation process of CSSE offers a novel and feasible strategy for developing inexpensive, and safe energy storage devices.
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QIU Yong-kang, HE Huan, GUO Bin, LI Pan-xin
2025,42(5)
Abstract:
In order to improve the mechanical and water resistance of thermoplastic starch (TPS), The effects of PR (Polymerized Rosin) and glycerol on the molecular structure, mechanics, cross-section morphology, thermal properties and water resistance of TPS were investigated by FTIR, electronic universal testing machine, scanning electron microscopy, thermogravimetric analyzer and contact angle tester. The results showed that the carboxyl group in PR was esterified with the OH on TPS, and with the increased content of PR , the tensile strength, bending strength and thermal properties of the sample gradually increased, while the elongation at break, impact strength and moisture absorption rate gradually decreased. When the mass fraction of PR was 10% and the mass fraction of glycerol was 15%, 80PR-TPS had the best properties, and its tensile and bending strengths reached the maximum of 15.25 MPa and 25.83 MPa, respectively, which were 8.81 and 23 times of TPS, while the elongation at break and impact strength decreased significantly. The contact angle reached the maximum78.8°, which is nearly 2.9 times that of TPS, and the equilibrium moisture absorption rate decreased from 9.60% of TPS to 6.37%, indicating improved water resistance. In addition, the thermal performance is also significantly improved.
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TIAN Tian, OLUBUNMI M.Olukowi, ZHANG Yuejun
2025,42(5)
Abstract:
Abstract: Taking the raw water of the Yangtze River as the simulated object, polyaluminum chloride (PAC) as the coagulant, and PAC/polydimethyldiallylammonium chloride (PDMDAAC) as the composite coagulant, the simulated raw water containing nitrogen disinfection by-product N-nitrosodimethylamine (NDMA) was used for coagulation treatment (coagulant treatment) and enhanced coagulation treatment (composite coagulant treatment), and the correlation between the water quality parameters (turbidity, CODMn, organic amine and ammonia nitrogen) and the NDMA removal rate in the simulated raw water after treatment was compared. Combined with the analysis of the microstructure, functional group properties and coagulation mechanism of the SEM characterization of pollutants representing water quality parameters, the removal mechanism of NDMA was speculated. The results showed that the water quality parameters and NDMA removal rate of various simulated raw water increased first and then stabilized or slightly decreased with the dosage increase of coagulant or composite coagulant after coagulation and enhanced coagulation treatment. The maximum removal rate of NDMA (5.88%~15.65% and 6.48%~16.90%) of one-component simulated raw water (containing NDMA and one of the four simulated pollutants (diatomite, sodium humate salt, dimethylamine hydrochloride and ammonium nitrate) was higher than that of NDMA containing only by (4.31% and 4.88%). The maximum removal rate of NDMA in multi-component simulated raw water (containing NDMA and four simulated pollutants (diatomite, sodium humate salt, dimethylamine hydrochloride and ammonium nitrate) was the highest (39.15% and 42.04%). The four pollutants adsorbed NDMA to different degrees based on their different microstructures and surface functional group characteristics. The electric neutralization and adsorption bridging effects generated by coagulants and composite coagulants can remove free and adsorbed NDMA by pollutants. The adsorption and synergistic adsorption of pollutants and the enhanced coagulation of composite coagulants significantly enhanced the removal of NDMA.
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TIE Jing-xi, YAN Meng-jia, DUAN Xiao-han, MA Jia-ying, WU Ji-sheng, SONG Yan-fei, CHEN Du, LIU Yu-hao
2025,42(5)
Abstract:
Papermaking sludge (PMS) and iron-based waterworks sludge (IBWS) was used as raw materials to prepare magnetic dual sludge biochar (MDSBC) using the one pot method. After being characterized by SEM, N2 adsorption-desorption, XRD, FTIR, XPS, and vibrating sample magnetometer, the static adsorption of ciprofloxacin hydrochloride (CIP) in water by MDSBC was studied. The results showed that when the mass ratio of IBWS: PMS was 1:2.5, MDSBC prepared by pyrolysis at 500 ℃ in N2 atmosphere had desirable CIP adsorption capacity and good magnetic separation performance. Within the initial pH range of 3-9, the adsorption capacity at pH 3 was the lowest due to electrostatic repulsion, which is 28.13 mg/g; The adsorption capacity was highest at pH 5, which was 33.65 mg/g. The adsorption process of CIP by MDSBC fitted the pseudo-first-order kinetic model. The adsorption isotherm model conformed to Langmuir model, and the adsorption process was spontaneous and exothermic. Aqueous Cl- and SO42- prompted CIP adsorption slightly, while PO43- could significantly inhibit the CIP adsorption with the rising PO43- concentration. After 5 cycles of reuse, the adsorption capacity of MDSBC decreased by 12.5%. The mechanism analysis indicated that electrostatic adsorption, chemical adsorption, hydrogen bonding, and π-π interaction were involved in the adsorption of CIP by MDSBC.
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Wang wen-lu, Jing yi, Bao kang
2025,42(5)
Abstract:
Using biochitosan quaternary ammonium salt (HACC) as functional monomer, acrylic acid (AA), butyl acrylate (BA), isooctyl acrylate (EHA) as soft monomer, methyl methacrylate (MMA) as hard monomer, and ammonium persulfate (APS) as initiator, semi-continuous seed pre-emulsion method was adopted. The water-proof and oil-proof AKD-HACC-A coating paper was prepared by using the method of surface coating with HACC-A and alkyl ketene dimer (AKD). The effects of emulsifier type, reaction time, initiator dosage, reaction temperature and HACC dosage on the particle size distribution and storage stability of HACC-A were investigated. Based on the characterization of FTIR, SEM and EDS, as well as the tests of water and oil resistance, physical properties, mechanical strength and printing effect of the paper, the influences of the coating amount of HACC-A, the ratio of HACC-A and AKD on the Cobb value of the coated paper and the oil resistance grade of kit were investigated. The results showed that the optimal synthesis process of HACC-A was as follows: OP-10 with a mass fraction of 5% (percentage of the total weight of monomer, the same below) is the emulsifier, the reaction temperature is 70 ℃, the amount of initiator APS is 0.8% (percentage of the total weight of monomer, the same below), and the reaction time is 2 h. Under such conditions, the particle size of HACC-A emulsion prepared is about 200 nm, the distribution is narrow, and the blue light is obvious. Stable storage for a long time (60 d); When the amount of HACC is 5 g and the amount of coating is 6 g/m2, the 60 s Cobb value of the paper after HACC-A coating is 54 g/m2, and the kit oil-proof grade is 6, which meets the food packaging standard. When m(HACC-A)∶m(AKD) = 1∶1, the coating amount is 6 g/m2. After coating the paper, the Cobb value of AKD-HACC-A coated paper 60 s is 30 g/m2, and the kit oil proof grade is 10. It showed good barrier properties to common oils (edible oil and pepper oil at room temperature and 105 ℃), organic solvents (ethanol and acetone) and alkaline solutions (hydrochloric acid and NaOH solution), and its oil proof performance was better than that of PE coated paper (Kit oil proof grade 6) and close to that of fluorinated paper (Kit oil proof grade 11). The active groups of amino and hydroxyl groups on the surface of HACC and good film formation play a key role in improving the performance of oil repellant AKD-HACC-A.
