Ag@AgBr点缀的花状Bi₂O₂CO₃对有机污染物的增强可见光光催化降解

Enhanced Visible Light Photocatalytic Degradation of Organic Pollutants over Flower-Like Bi₂O₂CO₃ Dotted with Ag@AgBr.

作者信息

Lin Shuanglong, Wang Miao, Liu Li, Liang Yinghua, Cui Wenquan, Zhang Zisheng, Yun Nan

机构信息

School of Chemical engineering and Technology, Tianjin University, Tianjin 300072, China.

Hebei Key Laboratory for Environment Photocatalytic and Electrocatalytic Materials, College of Chemical Engineering, North China University of Science and Technology, Tangshan 063009, China.

出版信息

Materials (Basel). 2016 Oct 31;9(11):882. doi: 10.3390/ma9110882.

DOI:10.3390/ma9110882

PMID:28774002

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5457266/

Abstract

A facile and feasible oil-in-water self-assembly approach was developed to synthesize flower-like Ag@AgBr/Bi₂O₂CO₃ micro-composites. The photocatalytic activities of the samples were evaluated through methylene blue degradation under visible light irradiation. Compared to Bi₂O₂CO₃, flower-like Ag@AgBr/Bi₂O₂CO₃ micro-composites show enhanced photocatalytic activities. In addition, results indicate that both the physicochemical properties and associated photocatalytic activities of Ag@AgBr/Bi₂O₂CO₃ composites are shown to be dependent on the loading quantity of Ag@AgBr. The highest photocatalytic performance was achieved at 7 wt % Ag@AgBr, degrading 95.18% methylene blue (MB) after 20 min of irradiation, which is over 1.52 and 3.56 times more efficient than that of pure Ag@AgBr and pure Bi₂O₂CO₃, respectively. Bisphenol A (BPA) was also degraded to further demonstrate the degradation ability of Ag@AgBr/Bi₂O₂CO₃. A photocatalytic mechanism for the degradation of organic compounds over Ag@AgBr/Bi₂O₂CO₃ was proposed. Results from this study illustrate an entirely new approach to fabricate semiconductor composites containing Ag@AgX/bismuth (X = a halogen).

摘要

开发了一种简便可行的水包油自组装方法来合成花状Ag@AgBr/Bi₂O₂CO₃微复合材料。通过在可见光照射下亚甲基蓝的降解来评估样品的光催化活性。与Bi₂O₂CO₃相比，花状Ag@AgBr/Bi₂O₂CO₃微复合材料表现出增强的光催化活性。此外，结果表明，Ag@AgBr/Bi₂O₂CO₃复合材料的物理化学性质及其相关的光催化活性均取决于Ag@AgBr的负载量。在Ag@AgBr负载量为7 wt%时实现了最高的光催化性能，光照20分钟后降解了95.18%的亚甲基蓝（MB），分别比纯Ag@AgBr和纯Bi₂O₂CO₃的效率高出1.52倍和3.56倍以上。还对双酚A（BPA）进行了降解，以进一步证明Ag@AgBr/Bi₂O₂CO₃的降解能力。提出了Ag@AgBr/Bi₂O₂CO₃上有机化合物降解的光催化机理。本研究结果说明了一种制备含Ag@AgX/铋（X = 卤素）的半导体复合材料的全新方法。