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题名: Roles of (001) and (101) Facets of Anatase TiO2 in Photocatalytic Reactions
作者: Wang Xiang1, 2;  Li Ren-Gui1, 2;  Xu Qian1;  Han Hong-Xian1;  Li Can1
关键词: TiO2 ;  Anatase ;  Photocatalysis ;  Crystal facet ;  Charge separation
刊名: ACTA PHYSICO-CHIMICA SINICA
发表日期: 2013-07-01
DOI: 10.3866/PKU.WHXB201304284
卷: 29, 期:7, 页:1566-1571
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Physical
研究领域[WOS]: Chemistry
英文摘要: Single crystals of anatase TiO2 with exposed (001) and (101) facets were synthesized by a hydrothermal method. We carried out photocatalytic reduction reactions to deposit noble metals (Au, Ag, and Pt) and photocatalytic oxidation reactions to deposit metal oxides (PbO2 and MnOx) on the surface of TiO2. The deposited anatase TiO2 samples were characterized by transmission electron microscopy (TEM), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), and X-ray photoelectron spectroscopy (XPS) to study the roles of the two facets of anatase TiO2 in photocatalytic reactions. The noble metals were selectively deposited on the exposed (101) facet, while metal oxides were selectively deposited on the exposed (001) facet. This result indicated that photogenerated electrons and holes mainly accumulated on the (101) and (001) facets, and then took part in photocatalytic reduction and oxidation reactions, respectively. These results also suggested that the simultaneous exposure of the two facets could facilitate charge separation. Therefore, it was proposed that the simultaneous exposure of two facets with different functions will be a new strategy to effectively promote photocatalytic reaction.
关键词[WOS]: PHOTOGENERATED ELECTRONS ;  ORIENTATION DEPENDENCE ;  SINGLE-CRYSTALS ;  WATER ;  SEPARATION ;  PARTICLES ;  OXIDATION ;  REDUCTION ;  MANGANESE ;  SURFACES
语种: 英语
WOS记录号: WOS:000320439300025
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/137794
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, State Key Lab Catalysis, Dalian 116023, Liaoning, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

Recommended Citation:
Wang Xiang,Li Ren-Gui,Xu Qian,et al. Roles of (001) and (101) Facets of Anatase TiO2 in Photocatalytic Reactions[J]. ACTA PHYSICO-CHIMICA SINICA,2013,29(7):1566-1571.
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