光催化
异质结
材料科学
双酚A
热液循环
三元运算
可见光谱
核化学
化学工程
纳米技术
催化作用
化学
复合材料
光电子学
有机化学
工程类
计算机科学
环氧树脂
程序设计语言
作者
Miaomiao Liu,Gang Lü,Xinmei Liu,Xiaoyi Wang,YunLong Chen,Wenlong Yang,Chunpeng Gao,Guanxiang Wang,Zhengchun Teng
标识
DOI:10.1016/j.colsurfa.2022.128772
摘要
Developing efficient photocatalysts is critical for degradation of organic pollutants. Herein, a highly efficient heterojunction photocatalyst (m-Bi2O4/Bi2O4−x/BiOCl) was synthesized by a hydrothermal method. Through changing the added volume of concentrated HCl acid, the ternary composite based on BiOCl nanosheets matrix on which the m-Bi2O4 micro-rods and the Bi2O4−x nanospheres are firmly attached. The prepared m-Bi2O4/Bi2O4−x/BiOCl showed a favorable degradation rate and mineralization ability towards Bisphenol A (BPA) and Ciprofloxacin (CIP) under visible light irradiation, which degraded 98.3% of BPA in 30 min, 82.3% of CIP in 80 min, and the rate constants were around 30.16 and 2.82 times higher than that of pure BiOCl, respectively. This enhanced photocatalytic activity of m-Bi2O4/Bi2O4−x/BiOCl composite can be originated from the improved light adsorption range and the synergistic effect of type-II and the Z-scheme charge transfer on the interfaces of m-Bi2O4, Bi2O4−x and BiOCl, which then lead to an accelerated separation and migration of photo-generated carriers. Meanwhile, the photoluminescence (PL) test and photoelectrochemistry (PEC) test provided strong evidence for the construction of the heterojunction. Moreover, the repeatability of m-Bi2O4/Bi2O4−x/BiOCl heterojunction photocatalyst was also investigated, and it still remained 90% photocatalytic activity after four successive cycles. This work proposed a possible photocatalytic pathway for m-Bi2O4/Bi2O4−x/BiOCl, which would open up a new avenue for water environment treatment utilizing ternary photocatalysts.
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