文章摘要
不同晶体形貌NH2-MIL-125(Ti)制备及光催化性能
Preparation and Photocatalytic Activity of NH2-MIL-125(Ti) with Different Crystal Morphologies
投稿时间:2018-07-26  修订日期:2018-11-20
DOI:
中文关键词: NH2-MIL-125(Ti)晶体  不同晶面  光催化  环己烷氧化
英文关键词: NH2-MIL-125(Ti) crystals  different crystal planes  photocatalytic  cyclohexane oxidation
基金项目: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)
作者单位E-mail
马蕊英 中国石化抚顺石油化工研究院 577217699@qq.com 
马迪 中国石油大学(北京) 理学院  
ZHAO Xiao-xia 中国石油大学(北京) 理学院  
许广 中国石油大学(北京) 理学院  
文平 中国石油大学(北京) 理学院  
张瑛 中国石油大学(北京) 理学院  Y.Zhang@cup.edu.cn 
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中文摘要:
      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。
英文摘要:
      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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