Effects of H2O2 generation over visible light-responsive Bi/Bi2O2-xCO3 nanosheets on their photocatalytic NOx removal performance | |
Lu, YF (Lu, Yanfeng)[ 1,2,3 ]1,2,3; Huang, Y (Huang, Yu)[ 1,2 ]; Zhang, YF (Zhang, Yufei)[ 1 ]; Huang, TT (Huang, Tingting)[ 1 ]; Li, HW (Li, Haiwei)[ 4 ]; Cao, JJ (Cao, Jun-ji)[ 1,2 ]; Ho, WK (Ho, Wingkei)[ 5 ] | |
通讯作者 | Huang, Yu(huangyu@ieecas.cn) |
2019-05-01 | |
发表期刊 | CHEMICAL ENGINEERING JOURNAL |
ISSN | 1385-8947 |
卷号 | 363页码:374-382 |
产权排序 | 1 |
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. |
关键词 | Photocatalysis NO oxidation Oxygen vacancy H2O2 Selectivity |
DOI | 10.1016/j.cej.2019.01.172 |
关键词[WOS] | OXYGEN VACANCIES ; CHARGE-TRANSFER ; DEGRADATION ; MECHANISMS ; BI2O2CO3 ; RADICALS ; OXIDE ; WATER ; SCR |
收录类别 | SCI ; SCIE |
语种 | 英语 |
资助项目 | National Key Research and Development Program of China[2016YFA0203000] ; National Key Research and Development Program of China[2017YFC0212200] ; National Science Foundation of China[41573138] ; National Science Foundation of China[51878644] ; Key Research and Development Program of Shaanxi Province[2018ZDCXL-SF-02-04] ; Hundred Talent Program of the Chinese Academy of Sciences |
WOS研究方向 | Engineering |
项目资助者 | National Key Research and Development Program of China ; National Science Foundation of China ; Key Research and Development Program of Shaanxi Province ; Hundred Talent Program of the Chinese Academy of Sciences |
WOS类目 | Engineering, Environmental ; Engineering, Chemical |
WOS记录号 | WOS:000457866400038 |
出版者 | ELSEVIER SCIENCE SA |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://ir.ieecas.cn/handle/361006/10931 |
专题 | 粉尘与环境研究室 |
通讯作者 | Huang, Y (Huang, Yu)[ 1,2 ] |
作者单位 | 1.Chinese Acad Sci, Inst Earth Environm, Key Lab Aerosol Chem & Phys, Xian 710061, Shaanxi, Peoples R China; 2.Chinese Acad Sci, Inst Earth Environm, SKLLQG, Xian 710061, Shaanxi, Peoples R China; 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China; 4.Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hung Hom, Hong Kong, Peoples R China; 5.Hong Kong Inst Educ, Dept Sci & Environm Studies, Hong Kong, Peoples R China |
推荐引用方式 GB/T 7714 | Lu, YF ,Huang, Y ,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 | Lu, YF .,Huang, Y .,Zhang, YF .,Huang, TT .,Li, HW .,...&Ho, WK .(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 | Lu, YF ,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. |
条目包含的文件 | ||||||
文件名称/大小 | 文献类型 | 版本类型 | 开放类型 | 使用许可 | ||
1-s2.0-S138589471930(7757KB) | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | 请求全文 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论