Effects of H2O2 generation over visible light-responsive Bi/Bi2O2-xCO3 nanosheets on their photocatalytic NOx removal performance
文献类型：期刊论文
| 作者 | Li, HW (Li, Haiwei)[ 4 ]; Huang, TT (Huang, Tingting)[ 1 ]; Zhang, YF (Zhang, Yufei)[ 1 ]; Huang, Y (Huang, Yu)[ 1,2 ]; Lu, YF (Lu, Yanfeng)[ 1,2,3 ]1,2,3; Ho, WK (Ho, Wingkei)[ 5 ]; Cao, JJ (Cao, Jun-ji)[ 1,2 ] |
| 刊名 | CHEMICAL ENGINEERING JOURNAL
 |
| 出版日期 | 2019-05-01 |
| 卷号 | 363页码:374-382 |
| 关键词 | Photocatalysis NO oxidation Oxygen vacancy H2O2 Selectivity |
| 产权排序 | 1 |
| 英文摘要 | The photocatalytic removal of gaseous NOx is commonly accompanied by secondary pollution, which necessitates the development of highly efficient nanostructured catalysts with a decreased propensity to toxic intermediate production. Herein, we describe the synthesis of plasmonic Bi/Bi2O2-xCO3 and demonstrate the presence of surface oxygen vacancies therein, revealing that the maximal NO, removal efficiency of Bi/Bi2O2-xCO3 under visible light irradiation reached 50.5% and exceeded that of a commercial photocatalyst, while the production of toxic NO2 as a by-product was completely suppressed (the selectivity reached up to 98%). In-situ introduction of plasmonic Bi on the surface of Bi2O2-xCO3 promoted the generation of H2O2 by capturing electrons from the defect states of Bi2O2-xCO3 via the two-electron reduction of O-2 and thus inhibited NO2 production (as confirmed by scavenger experiments), additionally broadening the light absorption range of the above photocatalyst. Moreover, surface oxygen vacancies in Bi-O layers provided a channel for electron transfer between Bi and Bi2O2-xCO3, which resulted in increased charge separation efficiency (maximum photocurrent = 1.1 Mu A cm(-2), 14.5 times higher than that of pristine Bi2O2CO3). Furthermore, the toxicity assessment authenticated good biocompatibility of Bi/Bi2O2-xCO3. Thus, this study sheds light on the possible roles of H2O2 in NOx degradation and provides an efficient surface engineering strategy to prepare highly reactive and selective photocatalysts. |
| 语种 | 英语 |
| 源URL | [http://ir.ieecas.cn/handle/361006/10931]  |
| 专题 | 地球环境研究所_粉尘与环境研究室 |
| 通讯作者 | Huang, Y (Huang, Yu)[ 1,2 ] |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China; 2.Chinese Acad Sci, Inst Earth Environm, SKLLQG, Xian 710061, Shaanxi, Peoples R China; 3.Chinese Acad Sci, Inst Earth Environm, Key Lab Aerosol Chem & Phys, Xian 710061, Shaanxi, Peoples R China; 4.Hong Kong Inst Educ, Dept Sci & Environm Studies, Hong Kong, Peoples R China 5.Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hung Hom, Hong Kong, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Li, HW ,Huang, TT ,Zhang, YF ,et al. Effects of H2O2 generation over visible light-responsive Bi/Bi2O2-xCO3 nanosheets on their photocatalytic NOx removal performance[J]. CHEMICAL ENGINEERING JOURNAL,2019,363:374-382. |
| APA | Li, HW .,Huang, TT .,Zhang, YF .,Huang, Y .,Lu, YF .,...&Cao, JJ .(2019).Effects of H2O2 generation over visible light-responsive Bi/Bi2O2-xCO3 nanosheets on their photocatalytic NOx removal performance.CHEMICAL ENGINEERING JOURNAL,363,374-382. |
| MLA | Li, HW ,et al."Effects of H2O2 generation over visible light-responsive Bi/Bi2O2-xCO3 nanosheets on their photocatalytic NOx removal performance".CHEMICAL ENGINEERING JOURNAL 363(2019):374-382. |
入库方式： OAI收割
来源：地球环境研究所
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