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题名: Enhanced Catalytic Activity of Sub-nanometer Titania Clusters Confined inside Double-Wall Carbon Nanotubes
作者: Zhang, Hongbo1;  Pan, Xiulian1;  Liu, Jingyue (Jimmy)1, 2;  Qian, Weizhong3;  Wei, Fei3;  Huang, Yuying4;  Bao, Xinhe1
关键词: epoxidation ;  nanoparticles ;  nanotubes ;  titania ;  X-ray absorption spectroscopy
刊名: CHEMSUSCHEM
发表日期: 2011
DOI: 10.1002/cssc.201000324
卷: 4, 期:7, 页:975-980
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: Sub-nanometer titania clusters have been homogeneously dispersed within double-wall carbon nantubes (DWNTs) with an inner diameter ranging from 1.0 to 1.5 nm. The confined titania exhibits a much higher activity than the titania particles attached on the outside walls of the DWNTs (the outside titania) in the epoxidation of propylene by H2O2. XPS, XANES and Raman spectroscopy data suggest electron transfer from titanium to the inner surfaces of the DWNTs. In contrast, no electron transfer has been observed for the outside titania. We also found that the extent of this confinement-induced electron transfer is temperature dependent. The enhanced activity of the confined titania clusters is likely attributed to their small sizes and the interaction with the DWNT surface. The synthesis method that we developed here can be readily applied to incorporation of other metal/metal oxide nanoparticles into carbon nanotubes.
关键词[WOS]: PHOTOCATALYTIC ACTIVITY ;  TIO2 ;  NANOPARTICLES ;  CHEMISTRY ;  DIAMETER ;  OXIDE
语种: 英语
WOS记录号: WOS:000293594300015
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/142475
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, State Key Lab Catalysis, Dalian 116023, Peoples R China
2.Univ Missouri, Dept Chem & Biochem, Dept Phys & Astron, Ctr Nanosci, St Louis, MO 63121 USA
3.Tsinghua Univ, Dept Chem Engn, Key Lab Green React Engn & Technol, Beijing 100084, Peoples R China
4.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrontron Radiat Ctr, Shanghai 201204, Peoples R China

Recommended Citation:
Zhang, Hongbo,Pan, Xiulian,Liu, Jingyue ,et al. Enhanced Catalytic Activity of Sub-nanometer Titania Clusters Confined inside Double-Wall Carbon Nanotubes[J]. CHEMSUSCHEM,2011,4(7):975-980.
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