CAS OpenIR
Number of Reactive Charge Carriers-A Hidden Linker between Band Structure and Catalytic Performance in Photocatalysts
Xiao, Jiadong1,2,3,4; Hang, Qingzhen1; Cao, Hongbin1; Rabeah, Jabor3; Yang, Jin1; Guo, Zhuang1,2; Zhou, Linbi1; Xie, Yongbing1; Brueckner, Angelika3
2019-10-01
Source PublicationACS CATALYSIS
ISSN2155-5435
Volume9Issue:10Pages:8852-8861
AbstractTailoring the band structure of a photocatalyst without causing significant changes in further properties and deriving unambiguous relationship between the number of charge carriers (CB-e(-) and VB-h(+)) and their reactivity in a photocatalytic reaction are very challenging, but highly important for rational catalyst design. In this work, semiquantitative relationships among the band structure, number of reactive charge carriers, yield of hydroxyl ((OH)-O-center dot) and superoxide (O-center dot(2)-) radicals, and degradation rate of oxalic acid as a model pollutant have been discovered in g-C3N4 photocatalysts by in situ electron paramagnetic resonance (EPR) coupled with an online spin trapping technique. We demonstrate that it is the number of reactive charge carriers which links the band structure of a photocatalyst with its catalytic performance. An optimum balance between the number and reducing ability of conduction band (CB) electrons (CB-e(-)), which depends on the interplay between the band gap and CB edge potential, is a key property for highly efficient g-C3N4 photocatalysts. A combination of (i) narrowing of the band gap and upshift of the CB edge at the same time, and (ii) using O-3 instead of O-2 as CB-e(-) trap would lead to the maximum number of reactive CB-e(-) and (OH)-O-center dot and, hence, to optimal photocatalytic activity.
Keywordg-C3N4 photocatalysis photocatalytic ozonation band structure number of reactive charge carriers in situ EPR
DOI10.1021/acscatal.9b02426
Language英语
WOS KeywordGRAPHITIC CARBON NITRIDE ; VISIBLE-LIGHT ; HYDROXYL RADICALS ; POROUS G-C3N4 ; SUPER SYNERGY ; WASTE-WATER ; OXALIC-ACID ; OZONATION ; OXIDATION ; NANOPARTICLES
Funding ProjectNatural Science Foundation of Beijing Municipality[8172043] ; National Science Fund for Distinguished Young Scholars of China[51425405] ; National Key Research and Development Program of China[2017YFC0210304] ; CAS-DAAD fellowship (Regierungsstipendien VR China-Programme for the Promotion of Outstanding Young Scholars)[91637735]
WOS Research AreaChemistry
WOS SubjectChemistry, Physical
Funding OrganizationNatural Science Foundation of Beijing Municipality ; National Science Fund for Distinguished Young Scholars of China ; National Key Research and Development Program of China ; CAS-DAAD fellowship (Regierungsstipendien VR China-Programme for the Promotion of Outstanding Young Scholars)
WOS IDWOS:000489204000001
PublisherAMER CHEMICAL SOC
Citation statistics
Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/31135
Collection中国科学院过程工程研究所
Corresponding AuthorRabeah, Jabor; Xie, Yongbing; Brueckner, Angelika
Affiliation1.Chinese Acad Sci, Beijing Engn Res Ctr Proc Pollut Control, Inst Proc Engn, Div Environm Technol & Engn, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Univ Rostock, Leibniz Inst Catalysis eV, Albert Einstein Str 29a, D-18059 Rostock, Germany
4.Univ Utrecht, Debye Inst Nanomat Sci, Inorgan Chem & Catalysis, Univ Weg 99, Utrecht, Netherlands
Recommended Citation
GB/T 7714
Xiao, Jiadong,Hang, Qingzhen,Cao, Hongbin,et al. Number of Reactive Charge Carriers-A Hidden Linker between Band Structure and Catalytic Performance in Photocatalysts[J]. ACS CATALYSIS,2019,9(10):8852-8861.
APA Xiao, Jiadong.,Hang, Qingzhen.,Cao, Hongbin.,Rabeah, Jabor.,Yang, Jin.,...&Brueckner, Angelika.(2019).Number of Reactive Charge Carriers-A Hidden Linker between Band Structure and Catalytic Performance in Photocatalysts.ACS CATALYSIS,9(10),8852-8861.
MLA Xiao, Jiadong,et al."Number of Reactive Charge Carriers-A Hidden Linker between Band Structure and Catalytic Performance in Photocatalysts".ACS CATALYSIS 9.10(2019):8852-8861.
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