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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
刊名JOURNAL OF PHYSICAL CHEMISTRY LETTERS
2017-04-06
DOI10.1021/acs.jpclett.7b00285
8期:7页:1419-1423
收录类别SCI
文章类型Article
WOS标题词Science & Technology ; Physical Sciences ; Technology
类目[WOS]Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Atomic, Molecular & Chemical
研究领域[WOS]Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
关键词[WOS]PHOTOCATALYTIC ACTIVITY ; RUTILE TIO2 ; TITANIUM-DIOXIDE ; FORCE MICROSCOPY ; BAND ALIGNMENT ; CARRIER SEPARATION ; ANATASE ; MECHANISMS ; SURFACE ; PHOTOLUMINESCENCE
英文摘要Phase 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.
语种英语
WOS记录号WOS:000398884800016
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文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/150336
专题中国科学院大连化学物理研究所
作者单位1.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
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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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