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Oxygen vacancy defects-boosted deep oxidation of NO by beta-Bi2O3/CeO2-delta p-n heterojunction photocatalyst in situ synthesized from Bi/Ce(CO3) (OH) precursor
Nie, Junli1,2; Zhu, Gangqiang1; Zhang, Weibin3; Gao, Jianzhi1; Zhong, Peng4; Xie, Xiaotao1; Huang, Yu2; Hojamberdiev, Mirabbos5
通讯作者Zhu, Gangqiang(zgq2006@snnu.edu.cn) ; Huang, Yu(huangyu@ieecas.cn)
2021-11-15
发表期刊CHEMICAL ENGINEERING JOURNAL
ISSN1385-8947
卷号424页码:11
摘要Flower-like n-type CeO2-delta is hybridized with p-type beta-Bi2O3 nanoparticles to design a novel beta-Bi2O3/CeO2-delta p-n heterojunction photocatalyst via a thermal treatment process of Bi/Ce(CO3)(OH) precursor. The synthesized beta-Bi2O3/CeO2-delta exhibits a remarkable enhancement in NO removal and significant suppression of toxic intermediates nitrogen dioxide (NO2) under visible light irradiation. The superior photocatalytic activity of beta-Bi2O3/CeO2-delta for NO removal is mainly derived from the synergistic effects of the oxygen vacancies (OVs) and p-n heterojunction. The OVs not only enhance the visible light utilization and boost the separation of electronhole pairs but also improve the adsorption and activation of NO and O-2. Particularly, the p-n heterojunction is beneficial for the interfacial migration of photogenerated charge carriers. Electron spin resonance (ESR) and trapping experiment reveal that the synergistic effects of OVs and p-n heterojunction can induce the generation of more active species. The electrochemical measurements and density-functional theory (DFT) calculations indepth confirm that both p-n heterojunction and OVs can accelerate the interfacial charge transfer, resulting in the deep oxidation of reactants. Therefore, the flower-like beta-Bi2O3/CeO2-delta p-n heterojunction photocatalyst exhibits an advanced photocatalytic activity for deep NO removal and a suppressed NO2 generation. In addition, monitoring the reaction products by in situ Fourier transform infrared spectrum (FTIR) further validates that the main products of nitrates are formed during the photocatalytic process. This work demonstrates a straightforward approach for construction of p-n heterojunction photocatalysts, which can enhance the effective photocatalytic activity and stability for NO removal.
关键词Bi/Ce(CO3)(OH) beta-Bi2O3/CeO2-delta Oxygen vacancy NO removal P-n heterojunction Deep oxidation
DOI10.1016/j.cej.2021.130327
关键词[WOS]VISIBLE-LIGHT IRRADIATION ; BI METAL ; DEGRADATION ; REMOVAL ; PERFORMANCE ; FABRICATION ; MECHANISM ; SPECTRUM ; CEO2 ; NANOCOMPOSITE
收录类别SCI ; SCI
语种英语
资助项目National Key Research and Development Program of China[2016YFA0203000] ; National Natural Science Foundation of China[51772183] ; National Natural Science Foundation of China[52072230] ; key Research and Development Program of Shaanxi Province[2018ZDCXL-SF-02-04] ; Fundamental Research Funds for the Central Universities[GK201903023] ; Graphene Application Technology Tangshan Public Service Platform
WOS研究方向Engineering
项目资助者National Key Research and Development Program of China ; National Natural Science Foundation of China ; key Research and Development Program of Shaanxi Province ; Fundamental Research Funds for the Central Universities ; Graphene Application Technology Tangshan Public Service Platform
WOS类目Engineering, Environmental ; Engineering, Chemical
WOS记录号WOS:000728512300003
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/361006/17312
专题粉尘与环境研究室
通讯作者Zhu, Gangqiang; Huang, Yu
作者单位1.Shaanxi Normal Univ, Sch Phys & Informat Technol, Xian 710062, Peoples R China
2.Inst Earth Environm, Chinese Acad Sci, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China
3.Yangtze Univ, Sch Phys & Optoelect Engn, Jingzhou 434023, Peoples R China
4.Xidian Univ, Sch Adv Mat & Nanotechnol, Xian 710126, Peoples R China
5.Tech Univ Berlin, Inst Chem, Str 17,Juni 135, D-10623 Berlin, Germany
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Nie, Junli,Zhu, Gangqiang,Zhang, Weibin,et al. Oxygen vacancy defects-boosted deep oxidation of NO by beta-Bi2O3/CeO2-delta p-n heterojunction photocatalyst in situ synthesized from Bi/Ce(CO3) (OH) precursor[J]. CHEMICAL ENGINEERING JOURNAL,2021,424:11.
APA Nie, Junli.,Zhu, Gangqiang.,Zhang, Weibin.,Gao, Jianzhi.,Zhong, Peng.,...&Hojamberdiev, Mirabbos.(2021).Oxygen vacancy defects-boosted deep oxidation of NO by beta-Bi2O3/CeO2-delta p-n heterojunction photocatalyst in situ synthesized from Bi/Ce(CO3) (OH) precursor.CHEMICAL ENGINEERING JOURNAL,424,11.
MLA Nie, Junli,et al."Oxygen vacancy defects-boosted deep oxidation of NO by beta-Bi2O3/CeO2-delta p-n heterojunction photocatalyst in situ synthesized from Bi/Ce(CO3) (OH) precursor".CHEMICAL ENGINEERING JOURNAL 424(2021):11.
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