项目名称: 紫外纳米线/可见光量子点型复合光催化材料的构筑及CO2转化性能研究
项目编号: No.21203077
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: 史海峰
作者单位: 江南大学
项目金额: 26万元
中文摘要: 本项目提出开发紫外纳米线/可见量子点型异质结复合半导体光催化材料,用于光催化CO2还原为碳氢燃料。(1)通过可见光响应型材料(如Bi2O3、WO3、BiVO4、Bi2WO6、C3N4等)来调控紫外光响应型材料(NaNbO3、NaTaO3)的电子能带结构,探索和发现复合光催化材料的可见光响应机制和光生电子-空穴的传输机制,实现光生电子-空穴有效的分离和利用,发展调控复合光催化材料能带结构的理论和方法。(2)研究复合光催化材料的纳米化技术,通过模板法、或表面张力和过饱和度的控制,制备出紫外纳米线/可见量子点型复合光催化材料。(3)系统研究其光吸收、导带和价带位置、微观结构等物性以及光催化CO2转化性能。在此基础上,阐明复合光催化材料的能带结构、光生电荷传输特性、表面担载、微观结构等与CO2转化性能的关系。本研究将为开发新型用于CO2转化的复合光催化材料提供理论指导和实验依据。
中文关键词: 光催化;CO2 还原;可见光;复合半导体;纳米线
英文摘要: This project puts forward to develop UV-sensitive nanowires/visible-light-sensitive quantum dot heterostructured composite photocatalysts for reduction of CO2 into renewable hydrocarbon fuel. Detailed investigations will be portioned into three major research objectives: (1) tune the electronic band structures of UV- sensitive multiple metal oxide ( NaNbO3, NaTaO3 ) through the visible-light- sensitive materials ( such as Bi2O3, WO3, BiVO4, Bi2WO6, C3N4 ), explore and discover the visible light response and photoinduced electron-hole transmission mechanisms in the composite photocatalyst, realize the photoinduced electron-hole efficient separation and utilization, and develop the theory and method of tuning the energy band structures of composite photocatalysts. (2) investigate the composite photocatalyst nanometer technology, prepare UV- sensitive nanowires/ visible-light-sensitive quantum dot composite photocatalysts via a template method, or the surface tension and the control of supersaturation. (3) research the optical absorption, valence and conduction band position, microstructure and photocatalytic CO2 reduction properties. On this basis, the relationship of the band structures, the photoinduced charge transfer characteristics, surface loading, microstructure of composite photocatalysts and CO2 reduction
英文关键词: photocatalysis;CO2 reduction;visible light;composite semiconductor;nanowires