助剂修饰增强银基光催化材料的稳定性与光催化活性

项目名称： 助剂修饰增强银基光催化材料的稳定性与光催化活性

项目编号： No.51472192

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 一般工业技术

项目作者： 余火根

作者单位： 武汉理工大学

项目金额： 83万元

中文摘要： 相比于传统的TiO2基光催化材料，银基光催化材料在降解有机污染物过程中往往表现出更高的可见光光催化性能而受到广泛关注。然而，由于其极强的光敏性，银基光催化材料在光催化过程中易于分解形成金属银，使材料表面受到严重破坏，进而导致光催化性能的下降。本项目拟以过渡金属离子(如Fe(III)、Co(II)、Cu(II)、Ni(II)等)为光催化剂助剂，通过离子注入法在光敏性银基光催化材料(如AgCl、AgBr、AgI、Ag2O、Ag2CO3、Ag3PO4等)表面修饰过渡金属离子助剂，以提高银基光催化材料的光诱导稳定性和光催化活性；研究各种过渡金属离子助剂对光敏性银基光催化材料的光诱导稳定性与光催化活性的影响，揭示银基光催化材料的结构稳定性与光催化活性间的内在联系，以及过渡金属离子助剂对银基光催化材料结构稳定性和光催化活性的增强机理，为发展新型、高效、稳定的银基可见光光催化材料提供一定的理论指导。

中文关键词： 光催化材料；纳米结构；化合物半导体；异质结；纳米材料

英文摘要： Compared with the well-known TiO2-based photocatalyst, Ag-based photocatalysts recently have been extensively investigated due to their excellent photocatalytic performance for the decomposition of organic substances under visible-light irradiation. Owing to their excellent photosensitive properties, however, the Ag-based photocatalysts can be decomposed into metallic Ag, resulting in an obvious destroy of its surface structure, which further causes the decrease of their photocatalytic performance. In this project, we intend to improve the photoinduced stability and photocatalytic activity of various Ag-based photocatalysts (such as AgCl, AgBr, AgI, Ag2O, Ag2CO3, and Ag3PO4) by surface grafting of transition metal ions (such as Fe(III), Co(II), Cu(II), and Ni(II)) working as the cocatalyst via an impregnation method. The effect of various transition metal ions on the photoinduced stability and photocatalytic activity of various Ag-based photocatalysts will be carefully investigated, with the aim of clarifying the dependence and improved mechanism of their photoinduced stability and photocatalytic activity. The implementation of this project may provide new insight for the preparation of new, high-performance and stable Ag-based photocatalytic materials.

英文关键词： photocatalyst;nanostructure;composite semiconductor;heterostructure;nanomaterials