Liang Mengjun, Zou Chentao, Wang Weihua, Yang Zhiyuan, Shen Kaixiang, Yang Yun, Yang Shuijin
Hubei Key Laboratory of Pollutant Analysis & Reuse Technology, College of Chemistry and Chemical Engineering, Hubei Normal University, Huangshi, 435002, People's Republic of China.
Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials, School of Physics and Telecommunication Engineering, South China Normal University, Guangzhou 510006, People's Republic of China.
Nanotechnology. 2021 Feb 5;32(6):065702. doi: 10.1088/1361-6528/abc039.
Vacancy-rich materials with high photocatalytic activity are of great interest for pollutants removal and play a significant role in green chemistry. Herein, we successfully synthesized Bi/BiO composite through hydrothermal route. In this case, the surface plasmon resonance effect of Bi and oxygen vacancies of BiO collectively increase the removal rate of pollutants. More importantly, the Bi/BiO composites have enhanced activity in the degradation of RhB, MO, BPA and CIP, and the reduction of Cr(VI) and PNA. Besides, an enhanced photocatalytic activity is due to the main reactive species of ·[Formula: see text] and h that is confirmed by trapping experiments and ESR analyses. The electronic structure and visible light harvesting of photocatalysts were measured and also theoretically calculated by using density functional theory and finite difference time domain calculations, DRS, VB x-ray photoelectron spectroscopy and Mott-Schottky plots, which allowed to propose a possible photocatalytic mechanism for the degradation process.
具有高光催化活性的富空位材料在污染物去除方面具有极大的吸引力，并且在绿色化学中发挥着重要作用。在此，我们通过水热法成功合成了Bi/BiO复合材料。在这种情况下，Bi的表面等离子体共振效应和BiO的氧空位共同提高了污染物的去除率。更重要的是，Bi/BiO复合材料在降解RhB、MO、BPA和CIP以及还原Cr(VI)和PNA方面具有增强的活性。此外，通过捕获实验和电子自旋共振（ESR）分析证实，增强的光催化活性归因于主要活性物种·[化学式：见原文]和h⁺。通过使用密度泛函理论和时域有限差分计算、漫反射光谱（DRS）、价带X射线光电子能谱和莫特-肖特基曲线对光催化剂的电子结构和可见光捕获进行了测量和理论计算，这使得我们能够提出降解过程可能的光催化机理。
