论文标题
在可见光下，通过基于WO3的同型/异质结光催化剂纯净的水纯化
Highly efficient water purification by WO3-based homo/heterojunction photocatalyst under visible light
论文作者
论文摘要
带隙工程吸引了对各种应用的特定电气和光学特性（例如太阳能收集，与能量相关的应用以及光催化剂）的特定电气和光学特性的越来越多的兴趣。在这里，我们提出了一种新颖而便捷的方法，通过使用球铣削在WO3光催化剂上制造WO3/Ti-Wox/tihyoz homo/heteroJunction，从而获得II型结构和欧姆接触的组合。使用UV-VIS，SEM/EDS，XRD，拉曼光谱和XPS获得材料的形态和结构特征。据揭示，氢化钛（TIH2）促进了同时的WO3还原和阳离子掺杂，从而产生氧气缺乏的间隔W离子（W5+，W4+），从而导致在WO3/Ti-Wox/Tihyoz界面上形成新的条带结构。结果，同型/异构结可以显着扩展到400 nm以上的光吸收，并促进光激发载体的空间分离，从而显着增强了光催化性能，从而在可见光光照射下降低了偶氮-DYE水污染物。
Bandgap engineering has attracted increasing interest in the field of semiconductive materials with specific electrical and optical characteristics for various applications, such as solar energy harvesting, energy-related applications, and photocatalysts. Here, we propose a novel and facile method to obtain a combination of type-II structure and Ohmic contact by the fabrication of WO3/Ti-WOx/TiHyOz homo/heterojunction on a WO3 photocatalyst using ball milling. The morphology and structural characterizations of the material are obtained using UV-vis, SEM/EDS, XRD, Raman spectroscopy, and XPS. It is revealed that titanium hydride (TiH2) facilitates simultaneous WO3 reduction and cation doping, which generates intervalent W ions (W5+, W4+) with oxygen deficiency, leading to the formation of new band structures at the WO3/Ti-WOx/TiHyOz interface. As a result, the homo/heterojunction significantly extends light absorption above 400 nm and facilitates the spatial separation of photoexcited carriers, which significantly enhances the photocatalytic performance to degrade azo-dye water pollutants under visible light irradiation.
