Wang Runquan, Zhang Yuerong, Chen Wanping, Tian Yuan, Song Kai, Li Jiaxian, Wang Guoying, Shi Gaofeng
School of Petrochemical Technology, Lanzhou University of Technology Lanzhou 730100 China
Key Laboratory of Low Carbon Energy and Chemical Engineering of Gansu Province Lanzhou 730100 China.
RSC Adv. 2022 Apr 29;12(21):13052-13064. doi: 10.1039/d2ra01435a. eCollection 2022 Apr 28.
Bi based catalysts have attracted continuous attention from the scientific community because of their excellent photochemical properties and wide application in photocatalytic treatment of environmental pollution. A series of Bi based catalysts with good crystallinity and high purity were prepared by calcination and hydrothermal synthesis. In the application of degrading formaldehyde aqueous solution in a mercury lamp and xenon lamp atmosphere, it was found that BiVO and BiWO showed excellent photochemical properties under ultraviolet and visible light. The tests of PL, UV-Vis and EIS confirmed their high activity. In the calculation based on density functional theory (DFT), through the analysis of the energy band structure, density of states (DOS) and partial wave density of states (PDOS), it is found that the d orbital of V and W elements has a great influence on the position and size of the energy band of the catalyst, which makes it have high activity and excellent electrochemical properties.
铋基催化剂因其优异的光化学性能以及在光催化处理环境污染方面的广泛应用，一直受到科学界的持续关注。通过煅烧和水热合成制备了一系列结晶度良好、纯度高的铋基催化剂。在汞灯和氙灯气氛下对甲醛水溶液进行降解应用时，发现BiVO和BiWO在紫外光和可见光下均表现出优异的光化学性能。PL、UV-Vis和EIS测试证实了它们的高活性。在基于密度泛函理论（DFT）的计算中，通过对能带结构、态密度（DOS）和分波态密度（PDOS）的分析，发现V和W元素的d轨道对催化剂能带的位置和大小有很大影响，使其具有高活性和优异的电化学性能。
