基于H3PMo12O40修饰一例MOF复合材料实现阳离子染料吸附
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TQ 426.91

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国家自然科学基金项目(面上项目)


Based on H3PMo12O40 to decorate an metal organic frameworks composites to achieve adsorption of cationic dyes
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    摘要:

    采用溶剂热法,以H3PMo12O40和金属有机骨架((Cu3(BTC)2, BTC=1,3,5-benzenetricarboxylate)为原料构筑一例金属有机骨架复合材料{H3PMo12O40@Cu3(BTC)2}?xG (G=客体分子),并采用IR、XRD、SEM、TG、BET等手段进行了表征。研究其对水溶液中亚甲基蓝(MB)的吸附性能,并探讨了初始pH,温度,不同初始浓度的MB对吸附容量的影响。结果表明降低温度和降低溶液的初始pH值有利于亚甲基蓝的吸附。等温吸附模型符合Langmuir等温吸附模型,动力学符合拟二级动力学。热力学参数ΔG<0,ΔΗ<0和ΔS>0,表明H3PMo12O40@Cu3(BTC)2对亚甲基蓝的吸附是自发和放热的,而且对甲基紫、罗丹明B、孔雀石绿、碱性品红等阳离子染料有良好的吸附性能。

    Abstract:

    By employing the H3PMo12O40 to assemble metal-organic framework((Cu3(BTC)2, BTC=1,3,5-benzenetricarboxylate), a metal organic frameworks composites, namely {H3PMo12O40@Cu3(BTC)2}?xG (G=guest). Through X-ray powder diffraction pattern (XRD), Fourier transform infrared spectrum (FT-IR), scanning electron micrographs (SEM), thermogravimetric (TG), brunaue Emmett teller (BET) H3PMo12O40@Cu3(BTC)2 the composition, structure, morphology, stability and toleration of H3PMo12O40@Cu3(BTC)2 have been fully characterized. The adsorption of methylene blue onto H3PMo12O40@Cu3(BTC)2 in aqueous solution was studied. The effects of the experimental parameters, including sample solution initial pH, temperature and initial concentration have been investigated. The results showed that the lower temperature and lower initial pH value were beneficial to the dye adsorption. The experiment data could be well described by the Langmuir equations and pseudo-second-order kinetic model. Thermodynamic parameters ΔG<0,ΔΗ<0 and ΔS>0 indicated that the MB adsorption onto H3PMo12O40@Cu3(BTC)2 was spontaneous and endothermic, The adsorption towards methyl violet, rhodamine B, malachite green and basic fuchsine cationic dyes also showed good adsorption properties.

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龚文朋,杜晓刚,田超强,杨水金.基于H3PMo12O40修饰一例MOF复合材料实现阳离子染料吸附[J].精细化工,2016,33(4):0

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  • 收稿日期:2015-12-16
  • 最后修改日期:2016-01-19
  • 录用日期:2016-01-22
  • 在线发布日期: 2016-03-10
  • 出版日期: