Ultrathin Bi4O5Br2 nanosheets with surface oxygen vacancies and strong interaction with Bi2O2CO3 for highly efficient removal of water contaminants
文献类型：期刊论文
| 作者 | Zhang, Lili ; Wang, Zhiqiang; Li, Tong; Hu, Chun; Yang, Min
|
| 刊名 | ENVIRONMENTAL SCIENCE-NANO
 |
| 出版日期 | 2022-04-14 |
| 卷号 | 9期号:4页码:1341-1352 |
| 关键词 | PHOTOCATALYTIC DEGRADATION POLLUTANTS FACETS |
| ISSN号 | 2051-8153 |
| 英文摘要 | Ultrathin Bi4O5Br2 nanosheets with about a 10 nm thickness were synthesized by in situ intergrowth with Bi2O2CO3 sheets at room temperature. The degradation rates of organic pollutants on the catalyst were 28.1, 9.5, and 8.5 times higher than those on P25, N-TiO2 and 50 nm thick Bi4O5Br2 under a visible LED. The supreme catalytic activity was confirmed to be due to the significantly enhanced charge separation and transfer by surface oxygen vacancies on the ultrathin nanosheets, and the facilitated adsorption-degradation process at the solid-liquid micro-interface. The photogenerated electrons were demonstrated to be trapped on surface OVs to reduce surface adsorbed O-2 into O-2(-). Meanwhile, the photogenerated holes were effectively utilized to directly oxidize organic pollutants at the catalyst surface. FTIR, HPLC-Q-TOF-MS and IC analysis confirmed that diclofenac (DCF) was degraded at the catalyst surface through decarboxylation, dechloridation and C-N cleavage, and further mineralized in reaction solution. In addition, the developed catalyst can work at different pH values (5-10) and was stable after eight reaction cycles, showing good potential in practical application. |
| 源URL | [https://ir.rcees.ac.cn/handle/311016/47914]  |
| 专题 | 生态环境研究中心_中国科学院饮用水科学与技术重点实验室 |
| 通讯作者 | Hu, Chun |
| 作者单位 | 1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Key Lab Drinking Water Sci & Technol, Beijing 100085, Peoples R China 2.Guangzhou Univ, Inst Environm Res Greater Bay, Key Lab Water Qual & Conservat Pearl River Delta, Minist Educ, Guangzhou 510006, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Lili,Wang, Zhiqiang,Li, Tong,et al. Ultrathin Bi4O5Br2 nanosheets with surface oxygen vacancies and strong interaction with Bi2O2CO3 for highly efficient removal of water contaminants[J]. ENVIRONMENTAL SCIENCE-NANO,2022,9(4):1341-1352. |
| APA | Zhang, Lili,Wang, Zhiqiang,Li, Tong,Hu, Chun,&Yang, Min.(2022).Ultrathin Bi4O5Br2 nanosheets with surface oxygen vacancies and strong interaction with Bi2O2CO3 for highly efficient removal of water contaminants.ENVIRONMENTAL SCIENCE-NANO,9(4),1341-1352. |
| MLA | Zhang, Lili,et al."Ultrathin Bi4O5Br2 nanosheets with surface oxygen vacancies and strong interaction with Bi2O2CO3 for highly efficient removal of water contaminants".ENVIRONMENTAL SCIENCE-NANO 9.4(2022):1341-1352. |
入库方式： OAI收割
来源：生态环境研究中心
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