Chemical etching fabrication of uniform mesoporous Bi@Bi2O3 nanospheres with enhanced visible light-induced photocatalytic oxidation performance for NOx | |
Zhang, Peng1,2,3; Huang, Yu1,2; Rao, Yongfang4; Chen, Meijuan5; Li, Xinwei6; Ho, Wingkei7; Lee, Shuncheng6; Cao, Junji1,2 | |
通讯作者 | Huang, Yu(huangyu@ieecas.cn) ; Cao, Junji(cao@loess.llqg.ac.cn) |
2021-02-15 | |
发表期刊 | CHEMICAL ENGINEERING JOURNAL |
ISSN | 1385-8947 |
卷号 | 406页码:11 |
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. |
关键词 | Uniform mesoporous Bi@Bi2O3 Photocatalytic NOx oxidation Work function |
DOI | 10.1016/j.cej.2020.126910 |
关键词[WOS] | SELF-SACRIFICIAL SYNTHESIS ; PLASMONIC BI METAL ; CARBON NITRIDE ; SPHERES-G-C3N4 NANOHYBRID ; OXYGEN VACANCIES ; FT-IR ; ADSORPTION ; BISMUTH ; G-C3N4 ; ACTIVATION |
收录类别 | SCI ; SCI |
语种 | 英语 |
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 |
项目资助者 | 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 |
WOS类目 | Engineering, Environmental ; Engineering, Chemical |
WOS记录号 | WOS:000603567400005 |
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/361006/15757 |
专题 | 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. |
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