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Insights into the effects of surface/bulk defects on photocatalytic hydrogen evolution over TiO2 with exposed {001} facets
Zhang, H; Cai, JM; Wang, YT; Wu, MQ; Meng, M; Tian, Y; Li, XG; Zhang, J; Zheng, LR; Jiang, Z; Gong, JL; Zhang J(张静); Zheng LR(郑黎荣)
2018
Source PublicationAPPLIED CATALYSIS B-ENVIRONMENTAL
ISSN0926-3373
EISSN1873-3883
Volume220Pages:126-136
SubtypeArticle
AbstractThis paper describes the effects of defect distribution on energy band structure and the subsequent photo catalytic activity over TiO2 with exposed {001} facets as the model catalyst. Our results show that only surface oxygen vacancies (V-o's) and Ti3+ centers in TiO2 can be induced by hydrogenation treatment, whereas the generation of bulk Vo's and Ti3+ species depends on the thermal treatment in nitrogen. Both the surface and bulk defects in TiO2 can promote the separation of electron-hole pairs, enhance the light absorption, and increase the donor density. The presence of surface and bulk defects in TiO2 can not change the valence band maximum, but determine the conduction band minimum. Surface defects in TiO2 induce a tail of conduction band located above the H+/H-2 redox potential, which benefits the photocatalytic performance. However, bulk defects in TiO2 generate a band tail below the H+/H-2 potential, which inhibits hydrogen production. Thus, the change of band gap structure by defects is the major factor to determine the photocatalytic activity of TiO2 for hydrogen evolution. It is a new insight into the rational design and controllable synthesis of defect-engineered materials for various catalytic processes.
KeywordTiO2 Defect distribution Surface/bulk {001} facets Photocatalytic hydrogen evolution
DOI10.1016/j.apcatb.2017.08.046
WOS KeywordANATASE TIO2 ; TITANIUM-DIOXIDE ; PHASE-TRANSFORMATION ; BLACK TIO2 ; NANOCRYSTALS ; DISORDER ; WATER ; BULK ; NANOPARTICLES ; NANOMATERIALS
Indexed BySCI ; EI
Language英语
WOS Research AreaChemistry ; Engineering
WOS SubjectChemistry, Physical ; Engineering, Environmental ; Engineering, Chemical
WOS IDWOS:000412957200013
EI Accession Number20173404077758
Citation statistics
Cited Times:64[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ihep.ac.cn/handle/311005/285493
Collection多学科研究中心
实验物理中心
中国科学院高能物理研究所_中国散裂中子源
Affiliation中国科学院高能物理研究所
First Author AffilicationInstitute of High Energy
Recommended Citation
GB/T 7714
Zhang, H,Cai, JM,Wang, YT,et al. Insights into the effects of surface/bulk defects on photocatalytic hydrogen evolution over TiO2 with exposed {001} facets[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2018,220:126-136.
APA Zhang, H.,Cai, JM.,Wang, YT.,Wu, MQ.,Meng, M.,...&郑黎荣.(2018).Insights into the effects of surface/bulk defects on photocatalytic hydrogen evolution over TiO2 with exposed {001} facets.APPLIED CATALYSIS B-ENVIRONMENTAL,220,126-136.
MLA Zhang, H,et al."Insights into the effects of surface/bulk defects on photocatalytic hydrogen evolution over TiO2 with exposed {001} facets".APPLIED CATALYSIS B-ENVIRONMENTAL 220(2018):126-136.
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