钒氧化物-石墨烯纳米复合材料的制备及催化苯羟基化性能

项目名称： 钒氧化物-石墨烯纳米复合材料的制备及催化苯羟基化性能

项目编号： No.21203058

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 物理化学

项目作者： 董永利

作者单位： 黑龙江科技大学

项目金额： 26万元

中文摘要： 石墨烯复合纳米金属（氧化物）材料的制备和性能研究是多相催化领域重要的前沿课题。本项目以石墨为原料，拟采用化学氧化分散/还原法制备高质量的石墨烯材料，通过表面化学修饰手段在石墨烯表面构建可控的化学缺陷做为金属成核中心，利用溶剂热和微波辅助法合成具有孤立钒氧活性中心的钒氧化物-石墨烯纳米复合材料催化剂VOx-Graphene，研究其液相催化苯羟基化性能。运用多种光谱、显微及界面技术分析催化剂结构特征，研究石墨烯与钒氧化物间的相互作用，探讨石墨烯独特的电子结构和界面特性对钒氧物种的分散、性质及存在状态的影响，揭示石墨烯对钒物种电子结构及活性的调变作用，建立VOx-Graphene催化剂表面结构特征与催化性能的关联；并在此基础上进一步优化反应条件，得到催化剂的高活性和高选择性。本课题的研究将进一步拓展石墨烯材料的化学应用研究领域，为苯直接氧化制备苯酚提供全新的研究体系和可借鉴的数据与思路。

中文关键词： 钒氧化物；还原氧化石墨烯；高分散；溶剂热；苯羟基化

英文摘要： Study of preparation and properties of nano-metal (oxide)-Graphene composite materials are important topics at the forefront of the field of heterogeneous catalysis. In this project, we intend to prepare high-quality graphene materials by chemical oxidation disperse / reduction method using nature graphite as raw materials, to construct controlled chemical defects in the graphene surface as a metal nucleation centers by means of surface chemical modification, to synthesize vanadium Oxide - graphene nano-composite catalysts VOx-Graphene with isolated VOx active center by using the solventsthermal and microwave assisted method, and to study its catalytic performance of liquid phase hydroxylation of benzene. Use a variety of spectroscopy, microscopy, and interface technology to analyze the structural features of catalyst to study the interaction between graphene and vanadium oxides, to discuss the influence of graphene's unique electronic structure and interface properties on the dispersion, nature and existence state of the vanadium species, to reveal the modulation function of graphene on the electronic structure and activity of vanadium species, to establish the relationship of surface structure characteristics with catalytic properties for VOx-graphene catalyst. And, on this basis， a further optimization of the

英文关键词： vanadium oxide；reduced graphene oxide；high dispersion；solvothermal；benzene hydroxylation