Effects of H2O2 generation over visible light-responsive Bi/Bi2O2-xCO3 nanosheets on their photocatalytic NOx removal performance

doi:10.1016/j.cej.2019.01.172

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	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	被引频次：56[WOS] [WOS记录] [WOS相关记录]
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.

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