高效太阳光驱动的CuM2O4-TiO2异质结型纳米光催化剂的构筑及其制氢性能

项目名称： 高效太阳光驱动的CuM2O4-TiO2异质结型纳米光催化剂的构筑及其制氢性能

项目编号： No.21271071

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 数理科学和化学

项目作者： 阎建辉

作者单位： 湖南理工学院

项目金额： 88万元

中文摘要： 开发新型高效太阳光催化体系，实现氢能的廉价开发和便捷利用，解决人类日益严峻的燃烧污染和能源紧缺问题，具有重要的科学价值和深远的现实意义。本项目基于热力学原理，优选带隙能适合的p型半导体与较强光催化氧化还原能力，且与光催化产氢有相匹配的能带结构的n-型半导体TiO2复合，构筑光响应范围宽，光量子效率高的p-n型纳米异质结复合太阳光催化产氢新体系。并对复合体进行掺杂、金属沉积和氧化物包覆等修饰，获得多种带隙的半导体相耦合，不同异质结协同作用的高效光催化产氢材料。研究纳米异质结内建电场抑制光致电荷复合机理，为动力学上提高光催化产氢效率探索基本规律；研究异质结半导体材料的能带结构匹配性，探索光催化剂的结构、组成与产氢活性的内在关系，为热力学上解决光催化产氢的可能性提供理论依据。研究各种内在、外部因素对光催化产氢性能的影响，为全面提高晶尖石类复合光催化剂产氢效率提供有效的实验数据和理论参考。

中文关键词： 水热法；复合金属氧化物；异质结；修饰；光催化产氢

英文摘要： The increasingly serious energy crisis and the environmental contamination have stimulated intense research on solar energy utilization. Hydrogen energy has been recognized as a potentially significant alternative form of storable and clean energy for the future. Therefore, the development of a novel solar photocatalytic hydrogen production system has important scientific significance. Based on the thermodynamic principle, a novel solar photocatalytic hydrogen production system with different p-n type heterojunction complex catalysts was obtained by using an appropriate band gap energy p-type semiconductor coupled with n-type TiO2 semiconductor containing strong photocatalytic oxidation-reduction capability. Then, a series of high efficient photocatalytic hydrogen production materials with different p-n type heterojunctions are fabricated by doping, metal deposition and oxide coated modified as-prepared complex catalysts. These materials have an enhanced absorbance in the visible-light region and high light quantum efficiency. First, the mechanism of nano-heterojunction built-in electric field to inhibit light-induced charge recombination is explored. The objective of the study is to explore the basic dynamics principle to improve the efficiency of photocatalytic hydrogen production; Second, the intrinsic relati

英文关键词： Hydrothermal method；Mixed-metal oxides；Heterojunction；Modification；Photocatalytic H2 evolution