School of Energy & Environmental Engineering, Hebei University of Technology, Tianjin 300130, China; School of Environment & Natural Resources, Renmin University of China, Beijing 100872, China.
School of Environment & Natural Resources, Renmin University of China, Beijing 100872, China.
J Hazard Mater. 2022 Feb 15;424(Pt C):127554. doi: 10.1016/j.jhazmat.2021.127554. Epub 2021 Oct 23.
Photocatalytic oxidation of contaminants in water has recently gained extensive attentions. In this study, Cu-doped BiOCl microsphere photocatalysts were prepared using solvothermal method. The effects of Cu doping ratio on the morphological structures and photoelectric and photocatalytic properties of BiOCl were studied in detail. Results showed that Cu doping affected the particle size of BiOCl microspheres. The introduction of Cu ions gradually increased the light absorption range and decreased the electron recombination rate of photocatalysts as shown by ultraviolet-visible diffuse reflection and photoluminescence spectra. The best doping ratio was 0.25 Cu-BiOCl, showing the highest photocatalytic activity for rhodamine B (14.25 time higher than BiOCl) and a good inhibition of algal growth. The main reactants in the photocatalytic system were·OH and h (electron holes). Density functional theory (DFT) calculations further demonstrated that the doping of Cu ions made the photogenerated carriers in BiOCl easier to generate and ensured the charge was transferred more rapidly. In conclusion, a novel high-efficiency multifunctional photocatalyst is proposed for the efficient organic pollutants removal and algae growth inhibition from water.
光催化氧化技术在近年来受到了广泛关注。本研究采用溶剂热法制备了掺铜的 BiOCl 微球光催化剂，并详细研究了 Cu 掺杂比对 BiOCl 的形貌结构、光电和光催化性能的影响。结果表明，Cu 掺杂会影响 BiOCl 微球的粒径。紫外-可见漫反射和光致发光光谱表明，Cu 离子的引入逐渐增加了光催化剂的光吸收范围，降低了电子复合率。最佳掺杂比为 0.25Cu-BiOCl，对罗丹明 B 的光催化活性最高（比 BiOCl 高 14.25 倍），对藻类生长有较好的抑制作用。光催化体系中的主要反应活性物质是·OH 和 h（电子空穴）。密度泛函理论（DFT）计算进一步证明，Cu 离子的掺杂使得 BiOCl 中的光生载流子更容易产生，并确保了载流子的快速转移。总之，本研究提出了一种新型高效多功能光催化剂，可用于高效去除水中的有机污染物和抑制藻类生长。
