中国科学院大连化学物理研究所机构知识库
Advanced  
DICP OpenIR  > 中国科学院大连化学物理研究所  > 期刊论文
题名: Localized Excitation of Ti3+ Ions in the Photoabsorption and Photocatalytic Activity of Reduced Rutile TiO2
作者: Wang, Zhiqiang1;  Wen, Bo2, 4;  Hao, Qunqing1;  Liu, Li-Min2;  Zhou, Chuanyao1;  Mao, Xinchun1;  Lang, Xiufeng2;  Yin, Wen-Jin2, 5;  Dai, Dongxu1;  Selloni, Annabella3;  Yang, Xueming1
刊名: JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
发表日期: 2015-07-22
DOI: 10.1021/jacs.5b04483
卷: 137, 期:28, 页:9146-9152
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Multidisciplinary
研究领域[WOS]: Chemistry
英文摘要: In reduced TiO2, electronic transitions originating from the Ti3+- induced states in the band gap are known to contribute to the photoabsorption, being in fact responsible for the material's blue color, but the excited states accessed by these transitions have not beep characterized in detail. In this work we investigate the excited state electronic structure of the prototypical ruffle TiO2(110) surface using two-photon photoemission spectroscopy (2PPE) and density functional theory (DFT) calculations. Using 2PPE, an excited resonant state derived from Ti3+ species is identified at 2.5 +/- 0.2 eV above the Fermi level (E-F) on both the reduced and hydroxylated surfaces. DFT calculations reveal that this excited state is closely related to the gap state at similar to 1.0 eV below E-F as they both result from the Jahn-Teller induced splitting of the 3d orbitals of Ti3+ ions in reduced TiO2. Localized excitation of Ti3+ ions via 3d -> 3d transitions from the gap state to this empty resonant state significantly increases the TiO2 photoabsorption and extends the absorbance to the visible region, consistent with the observed enhancement of the visible light induced photocatalytic activity of TiO2 through Ti3+ self-doping. Our work reveals the physical origin of the Ti3+ related photo absorption and visible light photocatalytic activity in prototypical TiO2, and also paves the way for the investigation of the electronic structure and photoabsorption of other metal oxides.
关键词[WOS]: COUPLED ELECTRON-TRANSFER ;  VISIBLE-LIGHT ;  TITANIUM-DIOXIDE ;  SURFACE SCIENCE ;  BAND-GAP ;  TIO2(110) SURFACE ;  AQUEOUS TIO2 ;  METHANOL ;  WATER ;  DISSOCIATION
语种: 英语
WOS记录号: WOS:000358556200042
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/146421
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

Files in This Item:

There are no files associated with this item.


作者单位: 1.Chinese Acad Sci, State Key Lab Mol React Dynam, Dalian Inst Chem Phys, Dalian 116023, Liaoning, Peoples R China
2.Beijing Computat Sci Res Ctr, Beijing 100094, Peoples R China
3.Princeton Univ, Dept Chem, Princeton, NJ 08544 USA
4.Peking Univ, Int Ctr Quantum Mat, Beijing 100871, Peoples R China
5.Chengdu Green Energy & Green Mfg Technol R&D Ctr, Chengdu 610207, Sichuan, Peoples R China

Recommended Citation:
Wang, Zhiqiang,Wen, Bo,Hao, Qunqing,et al. Localized Excitation of Ti3+ Ions in the Photoabsorption and Photocatalytic Activity of Reduced Rutile TiO2[J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,2015,137(28):9146-9152.
Service
 Recommend this item
 Sava as my favorate item
 Show this item's statistics
 Export Endnote File
Google Scholar
 Similar articles in Google Scholar
 [Wang, Zhiqiang]'s Articles
 [Wen, Bo]'s Articles
 [Hao, Qunqing]'s Articles
CSDL cross search
 Similar articles in CSDL Cross Search
 [Wang, Zhiqiang]‘s Articles
 [Wen, Bo]‘s Articles
 [Hao, Qunqing]‘s Articles
Related Copyright Policies
Null
Social Bookmarking
  Add to CiteULike  Add to Connotea  Add to Del.icio.us  Add to Digg  Add to Reddit 
所有评论 (0)
暂无评论
 
评注功能仅针对注册用户开放,请您登录
您对该条目有什么异议,请填写以下表单,管理员会尽快联系您。
内 容:
Email:  *
单位:
验证码:   刷新
您在IR的使用过程中有什么好的想法或者建议可以反馈给我们。
标 题:
 *
内 容:
Email:  *
验证码:   刷新

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.

 

 

Valid XHTML 1.0!
Powered by CSpace