不同晶体形貌NH2-MIL-125(Ti)制备及光催化性能
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O643.36

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国家重点基础研究发展计划(973计划);国家自然科学基金项目(面上项目,重点项目,重大项目)


Preparation and Photocatalytic Activity of NH2-MIL-125(Ti) with Different Crystal Morphologies
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The National Basic Research Program of China (973 Program);The National Natural Science Foundation of China (General Program, Key Program, Major Research Plan)

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    摘要:

    采用溶剂热法合成了NH2-MIL-125(Ti)晶体,通过调变N,N-二甲基甲酰胺(DMF)和无水甲醇(MeOH)两种溶剂比例,NH2-MIL-125(Ti)晶体呈现出圆形片、十面体和八面体形貌。采用XRD、SEM、FT-IR和BET等表征手段对不同形貌的NH2-MIL-125(Ti)晶体进行物性分析,并将其用于可见光光催化环己烷氧化反应,探究了催化性能与晶面之间的构效关系。分析得出, 环己烷选择性氧化生成环己醇和环己酮目标产物主要反应发生在NH2-MIL-125(Ti)晶体的{110}晶面族,而{101}晶面族主要是进一步氧化环己醇和环己酮产生COx。

    Abstract:

    NH2-MIL-125(Ti) crystals were prepared by a solvothermal method. By varing the ratios of N,N-dimethylformamide (DMF) and methanol (MeOH) in the synthesis system, NH2-MIL-125(Ti) crystals exhibited circular plate, decahedral or octahedral morphology. XRD, SEM, FT-IR and BET characterization techniques were used to study the physical properties of NH2-MIL-125(Ti) crystals with different morphologies. Then these crystals were used in the photocatalytic oxidation of cyclohexane under visible light irradiation. The structure-activity relationship between catalytic performance and crystal plane was explored. Results showed that the main reaction of selective oxidation of cyclohexane to target products cyclohexanol and cyclohexanone occurs in the {110} crystal face family of NH2-MIL-125(Ti) crystal, whereas the {101} crystal face family is mainly to further oxidize cyclohexanol and cyclohexanone into COx.

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马蕊英,马迪,ZHAO Xiao-xia,许广,文平,张瑛.不同晶体形貌NH2-MIL-125(Ti)制备及光催化性能[J].精细化工,2019,36(3):

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  • 收稿日期:2018-07-26
  • 最后修改日期:2018-11-20
  • 录用日期:2018-11-21
  • 在线发布日期: 2019-02-18
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