Incorporating Oxygen Atoms in a SnS(2)Atomic Layer toSimultaneously Stabilize Atomic Hydrogen and Accelerate theGeneration of Hydroxyl Radicals for Water Decontamination
文献类型：期刊论文
| 作者 | Li, Shanpeng; Liu, Chunlei ; Lv, Wenying; Liu, Guoguang
|
| 刊名 | ENVIRONMENTAL SCIENCE & TECHNOLOGY
 |
| 出版日期 | 2022-04-19 |
| 卷号 | 56期号:8页码:4980-4987 |
| 关键词 | CHROMIUM(VI) REDUCTION PARTICLES NANOWIRE REMOVAL CATHODE CR(VI) ACID |
| ISSN号 | 0013-936X |
| 英文摘要 | Photoelectrocatalysis (PEC) is an efficient way to address variouspollutants. Surface-adsorbed atomic hydrogen (H*) and hydroxyl radicals (center dot OH)play a key role in the PEC process. However, the instability of H*and lowproduction of center dot OH considerably limit the PEC efficiency. In this study, we notedthat incorporating oxygen atoms could regulate the behavior of H*by creating alocally favorable electron-rich state of S atoms in the SnS2catalyst. Thefinelymodulated H*led to a 12-fold decrease in the overpotential of H2O2generation(H*-OOH*-H2O2-center dot OH) by decreasing the activation energy barrier of OOH*(rate-determining step). Considering density functional theory calculations, an H*-center dot OH redox pair suitable for a wide pH range (3-11) was successfully constructedbased on the photocathode. The optimal SnS1.85O0.15AL@TNA photocathode exhibited a similar to 90% reduction in Cr(VI) in 10 min and similar to 70% TOC removal of 4-nitrophenol, nearly 2- and 3-fold higher than that without oxygen incorporation. Electron spin resonancespectrometry and radical quenching experiments verified that H*and the derived center dot OH via 1-electron and 3-electron reduction werethe main active species. Operando Raman spectroscopy confirmed that the stable SnO2phase helped constantly activate theproduction of H*and center dot OH |
| 源URL | [https://ir.rcees.ac.cn/handle/311016/47861]  |
| 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 | Liu, Guoguang |
| 作者单位 | 1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Key Lab Drinking Water Sci & Technol, Beijing 100085, Peoples R China 2.Guangdong Univ Technol, Sch Environm Sci & Engn, Guangzhou 510006, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Shanpeng,Liu, Chunlei,Lv, Wenying,et al. Incorporating Oxygen Atoms in a SnS(2)Atomic Layer toSimultaneously Stabilize Atomic Hydrogen and Accelerate theGeneration of Hydroxyl Radicals for Water Decontamination[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2022,56(8):4980-4987. |
| APA | Li, Shanpeng,Liu, Chunlei,Lv, Wenying,&Liu, Guoguang.(2022).Incorporating Oxygen Atoms in a SnS(2)Atomic Layer toSimultaneously Stabilize Atomic Hydrogen and Accelerate theGeneration of Hydroxyl Radicals for Water Decontamination.ENVIRONMENTAL SCIENCE & TECHNOLOGY,56(8),4980-4987. |
| MLA | Li, Shanpeng,et al."Incorporating Oxygen Atoms in a SnS(2)Atomic Layer toSimultaneously Stabilize Atomic Hydrogen and Accelerate theGeneration of Hydroxyl Radicals for Water Decontamination".ENVIRONMENTAL SCIENCE & TECHNOLOGY 56.8(2022):4980-4987. |
入库方式： OAI收割
来源：生态环境研究中心
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