石墨相氮化碳杂化提高钼酸铋光催化材料降解活性

Enhancement of the Photocatalytic Degradation Performances of Bi_2MoO_6 Nanoplate by g-C_3N_4 Modification

利用石墨相氮化碳对钼酸铋进行修饰,从而大幅度的提高光催化效率。采用X射线衍射分析、扫描电子显微镜和紫外可见分光光度计等分析方法,系统了解石墨相氮化碳修饰后钼酸铋催化材料的结构对其可见光催化性能的影响规律。分析石墨相氮化碳表面修饰材料与钼酸铋光催化材料之间的电子相互作用的本质以及对光生电荷传输的影响规律,通过具有共轭大π键体系的石墨相氮化碳杂化可以在钼酸铋界面上形成电子相互作用,促进光生载流子的传输及分离,揭示石墨相氮化碳与钼酸铋纳米片材料表面的表面状态及作用机理。

The present study described a simple template-free hydrothermal route at different p H values to prepare nanoplate nanostructures of Bi_2 MoO_6 acting as a visible light photocatalyst to degrade methylene blue and the influence of the morphology on photocatalytic activities was systematically investigated. After modificated with g-C_3N_4, the photocatalytic performances of Bi_2MoO_6 are increased. The effects of g-C_3N_4 modification on the structure and photocatalytic activities of Bi_2 MoO_6 catalysts were studied. The enhancement in performance is demonstrated to be the match of lattice and energy level between the g-C_3N_4 and Bi_2 Mo O_6. This match facilitates the separation and transfer of photogenerated electron-hole pairs at the heterojunction interfaces. In addition, this method is expected to be extended for other g-C_3N_4 loaded materials.