Schoolof Light Industry and Chemical Engineering, Dalian Polytechnic University, #1 Qinggongyuan, Dalian, 116034, PR China.
Schoolof Light Industry and Chemical Engineering, Dalian Polytechnic University, #1 Qinggongyuan, Dalian, 116034, PR China.
Chemosphere. 2020 Oct;257:127210. doi: 10.1016/j.chemosphere.2020.127210. Epub 2020 May 27.
BiOI nanosheets have been successfully deposited on the porous BiO nanorobs via a one-pot precipitation method. The physicochemical features of the as-prepared materials were characterized in detail by a series of techniques, and the results revealed that BiOI nanosheets were evenly distributed on the porous BiO nanorobs. Because of higher photogenerated electron-hole pairs separation efficiency and the larger specific surface area compared to the pristine BiO and BiOI, the 50%BiO/BiOI composite exhibited significantly enhanced photocatalytic activity for Cr(VI) reduction under visible light irradiation, and the reduction rate constant was 0.02002 min, which was about 27.4 and 2.6 times higher than that of pure BiO (0.00073 min) and BiOI (0.00769 min), respectively. Moreover, the 50%BiO/BiOI composite also possessed the excellent photochemical stability and recyclability, thereby facilitating its wastewater treatment application.
BiOI 纳米片已通过一锅沉淀法成功沉积在多孔 BiO 纳米棒上。通过一系列技术详细表征了所制备材料的物理化学性质，结果表明 BiOI 纳米片均匀分布在多孔 BiO 纳米棒上。与原始的 BiO 和 BiOI 相比，由于光生电子-空穴对分离效率更高和比表面积更大，50%BiO/BiOI 复合材料在可见光照射下对 Cr(VI)还原表现出显著增强的光催化活性，还原速率常数为 0.02002 min，分别是纯 BiO（0.00073 min）和 BiOI（0.00769 min）的 27.4 倍和 2.6 倍。此外，50%BiO/BiOI 复合材料还具有优异的光化学稳定性和可循环性，从而有利于其在废水处理中的应用。
