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Chemical etching fabrication of uniform mesoporous Bi@Bi2O3 nanospheres with enhanced visible light-induced photocatalytic oxidation performance for NOx

文献类型：期刊论文

作者Zhang, Peng1,2,3; Huang, Yu1,2; Rao, Yongfang4; Chen, Meijuan5; Li, Xinwei6; Ho, Wingkei7; Lee, Shuncheng6; Cao, Junji1,2
刊名CHEMICAL ENGINEERING JOURNAL
出版日期2021-02-15
卷号406页码:11
ISSN号1385-8947
关键词Uniform mesoporous Bi@Bi2O3 Photocatalytic NOx oxidation Work function
DOI10.1016/j.cej.2020.126910
通讯作者Huang, Yu(huangyu@ieecas.cn) ; Cao, Junji(cao@loess.llqg.ac.cn)
英文摘要Bulk materials with a microporous structure are adverse to light adsorption, photoelectron and reactant transport in a photocatalytic reaction. Mesoporous photocatalysts have shown many marked advantages in photo catalytic fields. Herein, uniform mesoporous Bi@Bi2O3 nanospheres were fabricated by HCl-ethanol chemical etching at low temperature (60 degrees C). The obtained mesoporous photocatalysis increased the NO removal efficiency (16%) and inhibited toxic NO2 generation (3%) under visible light irradiation. Further oxidation of Bi and calcination at high temperatures were avoided during template removal. Moreover, the as-prepared sample possessed a remarkably narrower pore size distribution (3.2-3.9 nm) and stronger light and NO adsorption ability than the bulk microporous Bi@Bi2O3. Work function and the electron spin resonance test results also indicated that the position of the entire energy bands on Bi2O3 was lowered. The amount of reactive oxygen species generated over the uniform mesoporous structure was higher than that over bulk Bi@Bi2O3. However, photoelectrochemical measurements indicated that the separation efficiencies of the photo-generated carriers were not improved over the uniform mesoporous Bi@Bi2O3. Comprehensive studies have shown that the oxi-dation ability rather than the enhanced separation efficiency of charge carriers accounted for the enhanced photocatalytic activity. This work elucidates the roles of a uniform mesoporous structure in NOx photocatalytic oxidation and provides an efficient strategy for structural engineering in preparing highly reactive and practical photocatalysts.
WOS关键词SELF-SACRIFICIAL SYNTHESIS ; PLASMONIC BI METAL ; CARBON NITRIDE ; SPHERES-G-C3N4 NANOHYBRID ; OXYGEN VACANCIES ; FT-IR ; ADSORPTION ; BISMUTH ; G-C3N4 ; ACTIVATION
资助项目National Key Research and Development Program of China, China[2016YFA0203000] ; National Nature Science Foundation of China, China[51878644] ; National Nature Science Foundation of China, China[41573138] ; Chinese Academy of Sciences, China[XDA23010300] ; Chinese Academy of Sciences, China[XDA23010000] ; Chinese Academy of Sciences, China
WOS研究方向Engineering
语种英语
出版者ELSEVIER SCIENCE SA
WOS记录号WOS:000603567400005
资助机构National Key Research and Development Program of China, China ; National Nature Science Foundation of China, China ; Chinese Academy of Sciences, China ; Chinese Academy of Sciences, China
源URL[http://ir.ieecas.cn/handle/361006/15756]  
专题地球环境研究所_粉尘与环境研究室
第四纪科学与全球变化卓越创新中心
通讯作者Huang, Yu; Cao, Junji
作者单位1.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol SKLLQG, Key Lab Aerosol Chem & Phys, Xian 710061, Peoples R China
2.CAS Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Xi An Jiao Tong Univ, Dept Environm Sci & Engn, Xian 710049, Peoples R China
5.Xi An Jiao Tong Univ, Sch Human Settlements & Civil Engn, Xian 710049, Peoples R China
6.Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hong Kong, Peoples R China
7.Educ Univ Hong Kong, Dept Sci & Environm Studies, Hong Kong, Peoples R China
推荐引用方式
GB/T 7714		 Zhang, Peng,Huang, Yu,Rao, Yongfang,et al. Chemical etching fabrication of uniform mesoporous Bi@Bi2O3 nanospheres with enhanced visible light-induced photocatalytic oxidation performance for NOx[J]. CHEMICAL ENGINEERING JOURNAL,2021,406:11.
APA Zhang, Peng.,Huang, Yu.,Rao, Yongfang.,Chen, Meijuan.,Li, Xinwei.,...&Cao, Junji.(2021).Chemical etching fabrication of uniform mesoporous Bi@Bi2O3 nanospheres with enhanced visible light-induced photocatalytic oxidation performance for NOx.CHEMICAL ENGINEERING JOURNAL,406,11.
MLA Zhang, Peng,et al."Chemical etching fabrication of uniform mesoporous Bi@Bi2O3 nanospheres with enhanced visible light-induced photocatalytic oxidation performance for NOx".CHEMICAL ENGINEERING JOURNAL 406(2021):11.

入库方式： OAI收割

来源：地球环境研究所

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