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Directly Probing Charge Separation at Interface of TiO2 Phase Junction
Gao, Yuying1,2,3; Zhu, Dian1,3; An, Hongyu1,2,3; Yan, Pengli1,2; Huang, Baokun1; Chen, Ruotian1,2,3; Fan, Fengtao1,3; Li, Can1,3
Source PublicationJOURNAL OF PHYSICAL CHEMISTRY LETTERS
2017-04-06
DOI10.1021/acs.jpclett.7b00285
Volume8Issue:7Pages:1419-1423
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
WOS SubjectChemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Atomic, Molecular & Chemical
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
WOS KeywordPHOTOCATALYTIC ACTIVITY ; RUTILE TIO2 ; TITANIUM-DIOXIDE ; FORCE MICROSCOPY ; BAND ALIGNMENT ; CARRIER SEPARATION ; ANATASE ; MECHANISMS ; SURFACE ; PHOTOLUMINESCENCE
AbstractPhase junction is often recognized as an effective strategy to achieve efficient charge separation in photocatalysis and photochemistry. As a crucial factor to determine the photogenerated charges dynamics, there is an increasingly hot debate about the energy band alignment across the interface of phase junction. Herein, we reported the direct measurement of the surface potential profile over the interface of TiO2 phase junction. A built-in electric field up to 1 kV/cm from rutile to anatase nanoparticle was detected by Kelvin Probe Force Microscopy (KPFM). Home-built spatially resolved surface photovoltage spectroscopy (SRSPS) supplies a direct evidence for the vectorial charge transfer of photogenerated electrons from rutile to anatase. Moreover, the tunable anatase nanoparticle sizes in TiO2 phase junction leads to high surface photovoltage (SPV) by creating completely depleted space charge region (SCR) and enhancing the charge separation efficiency. The results provide a strong basis for understanding the impact of built-in electric field on the charge transfer across the interface of artificial photocatalysts.
Language英语
WOS IDWOS:000398884800016
Citation statistics
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/150336
Collection中国科学院大连化学物理研究所
Affiliation1.Chinese Acad Sci, State Key Lab Catalysis, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, Zhongshan Rd 457, Dalian 116023, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Collaborat Innovat Ctr Chem Energy Mat iChEM, Zhongshan Rd 457, Dalian 116023, Peoples R China
Recommended Citation
GB/T 7714
Gao, Yuying,Zhu, Dian,An, Hongyu,et al. Directly Probing Charge Separation at Interface of TiO2 Phase Junction[J]. JOURNAL OF PHYSICAL CHEMISTRY LETTERS,2017,8(7):1419-1423.
APA Gao, Yuying.,Zhu, Dian.,An, Hongyu.,Yan, Pengli.,Huang, Baokun.,...&Li, Can.(2017).Directly Probing Charge Separation at Interface of TiO2 Phase Junction.JOURNAL OF PHYSICAL CHEMISTRY LETTERS,8(7),1419-1423.
MLA Gao, Yuying,et al."Directly Probing Charge Separation at Interface of TiO2 Phase Junction".JOURNAL OF PHYSICAL CHEMISTRY LETTERS 8.7(2017):1419-1423.
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