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Visible-light-driven N-(BiO)(2)CO3/Graphene oxide composites with improved photocatalytic activity and selectivity for NOx removal
Chen, Meijuan1; Huang, Yu2,3; Yao, Jie2; Cao, Jun-ji2,3; Liu, Yuan2
2018-02-01
Source PublicationAPPLIED SURFACE SCIENCE
Volume430Issue:2018Pages:137-144
SubtypeArticle
AbstractN-doped (BiO)(2)CO3 (NBOC)/graphene oxide (GO) composite obtained from three-dimensional hierarchical microspheres is successfully synthesized by one-pot hydrothermal method for the first time. In this synthesis, citrate ion plays a critical role in N doping. The obtained samples are used to degrade gaseous nitrogen oxides (NOx) at parts-per-billion (ppb) level under visible-light irradiation. NBOC-GO composite with 1.0 wt% graphene oxide (GO) displays the highest photocatalytic NO removal efficiency, which is 4.3 times higher than that of pristine (BiO)(2)CO3. Moreover, NBOC-GO composite significantly inhibits toxic NO2 intermediate production, indicating its high selectivity for NO conversion. Compared with regular GO, N doping considerably improves the catalytic performance of NBOC-GO composite, which increases NO removal by 74.6% and fully inhibits NO2 generation. The improved photocatalytic activity is mainly ascribed to extended optical absorption ability and enhanced separation efficiency of photogenerated charge carriers over NBOC-GO composite. Both results of electron spin resonance and theoretical analysis of band structure indicate that NO removal is dominated by oxidation with center dot OH and center dot O-2(-) radicals. The photocatalytic activity improvement mechanism over the NBOC-GO composite is proposed accordingly based on systematic characterizations. This study demonstrates a feasible route to fabricating Bi-containing composites with high selectivity and stability for air pollution control and provides a new insight into the associated photocatalytic mechanisms. (C) 2017 Elsevier B.V. All rights reserved.
Keyword(Bio)(2)Co3 n Doping Go No Removal Composite
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
DOI10.1016/j.apsusc.2017.06.056
WOS Keyword(BIO)(2)CO3 HIERARCHICAL MICROSPHERES ; FACILE SYNTHESIS ; PERFORMANCE ; BI2O2CO3 ; GRAPHENE ; SURFACE ; DEGRADATION ; FABRICATION ; POLLUTANTS ; STABILITY
Indexed BySCI
Language英文
WOS Research AreaChemistry ; Materials Science ; Physics
WOS SubjectChemistry, Physical ; Materials Science, Coatings & Films ; Physics, Applied ; Physics, Condensed Matter
WOS IDWOS:000416961500008
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/5178
Collection粉尘与环境研究室
Affiliation1.Xi An Jiao Tong Univ, Sch Human Settlements & Civil Engn, Xian 710049, Shaanxi, Peoples R China
2.Chinese Acad Sci, Inst Earth Environm, Key Lab Aerosol Chem & Phys, Xian 710061, Shaanxi, Peoples R China
3.Chinese Acad Sci, Inst Earth Environm, SKLLQG, Xian 710061, Shaanxi, Peoples R China
Recommended Citation
GB/T 7714
Chen, Meijuan,Huang, Yu,Yao, Jie,et al. Visible-light-driven N-(BiO)(2)CO3/Graphene oxide composites with improved photocatalytic activity and selectivity for NOx removal[J]. APPLIED SURFACE SCIENCE,2018,430(2018):137-144.
APA Chen, Meijuan,Huang, Yu,Yao, Jie,Cao, Jun-ji,&Liu, Yuan.(2018).Visible-light-driven N-(BiO)(2)CO3/Graphene oxide composites with improved photocatalytic activity and selectivity for NOx removal.APPLIED SURFACE SCIENCE,430(2018),137-144.
MLA Chen, Meijuan,et al."Visible-light-driven N-(BiO)(2)CO3/Graphene oxide composites with improved photocatalytic activity and selectivity for NOx removal".APPLIED SURFACE SCIENCE 430.2018(2018):137-144.
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