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Di-functional Cu2+-doped BiOCl photocatalyst for degradation of organic pollutant and inhibition of cyanobacterial growth
Journal of Hazardous Materials ( IF 13.6 ) Pub Date : 2021-10-23 , DOI: 10.1016/j.jhazmat.2021.127554
Zeqing Long 1 , Hongliang Wang 2 , Kaiwen Huang 3 , Guangming Zhang 3 , Haijiao Xie 4
Affiliation  

Photocatalytic oxidation of contaminants in water has recently gained extensive attentions. In this study, Cu2+-doped BiOCl microsphere photocatalysts were prepared using solvothermal method. The effects of Cu2+ doping ratio on the morphological structures and photoelectric and photocatalytic properties of BiOCl were studied in detail. Results showed that Cu2+ doping affected the particle size of BiOCl microspheres. The introduction of Cu2+ 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 Cu2+-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 Cu2+ 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.



中文翻译:

双功能Cu2+掺杂BiOCl光催化剂降解有机污染物和抑制蓝藻生长

光催化氧化水中污染物近年来受到广泛关注。本研究采用溶剂热法制备了Cu 2+掺杂BiOCl微球光催化剂。详细研究了Cu 2+掺杂比对BiOCl的形貌结构及光电和光催化性能的影响。结果表明,Cu 2+掺杂影响BiOCl微球的粒径。如紫外-可见漫反射和光致发光光谱所示,Cu 2+离子的引入逐渐增加了光催化剂的光吸收范围,降低了光催化剂的电子复合率。最佳掺杂比为0.25 Cu 2+-BiOCl,对罗丹明 B 显示出最高的光催化活性(比 BiOCl 高 14.25 倍),并且对藻类生长有良好的抑制作用。光催化体系中的主要反应物是·OH和h +(电子空穴)。密度泛函理论(DFT)计算进一步表明,Cu 2+离子的掺杂使BiOCl中的光生载流子更容易产生,并确保电荷更快速地转移。总之,提出了一种新型高效多功能光催化剂,用于有效去除水中的有机污染物和抑制藻类生长。

更新日期:2021-10-30
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