量子点敏化石墨烯基介孔包覆QD@TiO2/GR复合纳米材料制备及协同可见光催化性能

项目名称： 量子点敏化石墨烯基介孔包覆QD@TiO2/GR复合纳米材料制备及协同可见光催化性能

项目编号： No.21476095

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 有机化学

项目作者： 李佑稷

作者单位： 吉首大学

项目金额： 81万元

中文摘要： 采用功能化离子液体自组装法合成量子点敏化石墨烯基介孔包覆QD@TiO2/GR复合纳米材料（QD:量子点，GR:石墨烯）。利用该类材料的具有的纳米介孔包覆特性、极高的电导性能，结合复合TiO2异质界面效应、协同催化效应，提高可见光催化活性、光量子产率和可见光利用率，阐述协同催化机制和优化构效关系。本课题重点研究材料的制备工艺过程与其结构、性能的关系；研究该复合纳米材料的微观结构、化学组成、异质界面、能带结构与光催化性能的关系及对拓展可见光响应范围的作用；研究该类材料的光生载流子的传输机理和反应物的降解行为及其动力学过程，寻找具有高活性和良好重复使用性能的量子点敏化石墨烯基介孔包覆TiO2类复合纳米光催化材料。本课题的研究将为探索这类材料的制备及在光催化领域的实际应用提供理论依据和奠定实验基础。本项目采用的技术路线新颖，制备材料的性能独特，其可见光催化性能研究也将是一个有前景的领域。

中文关键词： 介孔包覆；量子点；石墨烯；功能化离子液体；可见光催化性能

英文摘要： Functional ionic liquid self-assembly method is used to fabricate a quantum dot sensitized graphene base-mesoporous coating QD@TiO2/@GR composite nanomaterials (QD: quantum dots, GR: graphene). In term of the mesoporous coating characteristics and large conductive properties of the materials, as well as the heterogeneous interface and synergised catalytic effects of TiO2 composites,the visible-light driven catalytic activity, the quantum yield and the use of visible light increase. In addition, the synergetic mechanism is described and structure-activity relationship of the materials is optimized. The relationship between the preparation conditions of the photocatalytic material and its structure and performance is mainly studied. The relationships between the microstructure, chemical composition, heterogeneous interface and band structure of the composite material and its photocatalytic performance and the role of expanding the visible light response range are also studied. The transmission mechanism of photogenerated charge carriers, and the degradation of reactant and its dynamics process by the materials are assessed to looking for a high activity and good reusability of quantum dot-sensitized graphene base-mesoporous coating composite photocatalytic nanomaterials of TiO2 kind. The study of the project will provide theoretical basis and lay experimental foundation for exploring the preparation of the kind of material and its actual application in photocatalysis. The technical route of this project is original,and synthesized material performance is unique, so research on the photocatalytic performance under visible light shows great potential.

英文关键词： Mesoporous coating;Quantium dots;Graphene;Functional ionic liquid;Visible-light driven catalytic performance