Sun Rui, Li Risheng, Zhong Shuang, Song Ningning, Zhao Zhiqing, Zhang Shengyu
Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun, 130021, People's Republic of China.
China Northeast Municipal Engineering Design and Research Institute Co., Ltd., Changchun, People's Republic of China.
Environ Sci Pollut Res Int. 2021 Jun;28(22):27864-27877. doi: 10.1007/s11356-021-12666-7. Epub 2021 Jan 31.
For effective photocatalytic pollutant degradation on bismuth tungstate (BiWO), it is vital to enhance the photogenerated charge separation and the photochemical stability. Herein, we successfully fabricated yttrium (Y)-BiWO/graphene (G) nanocomposites with a significantly enhanced visible light-driven photocatalytic ability to degrade Rhodamine B compared with the bare BiWO. This is attributed to the remarkably improved visible light absorption capability and photogenerated charge separation after doping yttrium and subsequent coupling with graphene, as revealed by photoluminescence and electrochemical impedance spectroscopies. Moreover, trapping experiments were carried out to clarify that photogenerated ·O and holes were the dominant oxidative species in the photocatalytic reaction. In addition, it was confirmed that the resulting composites maintained good photostability and chemical stability during recycling tests. Graphical abstract.
为了实现钨酸铋（BiWO）上有效的光催化污染物降解，增强光生电荷分离和光化学稳定性至关重要。在此，我们成功制备了钇（Y）-BiWO/石墨烯（G）纳米复合材料，与裸BiWO相比，其可见光驱动的光催化降解罗丹明B的能力显著增强。光致发光和电化学阻抗谱显示，这归因于掺杂钇并随后与石墨烯耦合后可见光吸收能力和光生电荷分离的显著改善。此外，进行了捕获实验以阐明光生·O和空穴是光催化反应中的主要氧化物种。此外，证实了所得复合材料在循环测试期间保持良好的光稳定性和化学稳定性。图形摘要。
