Enhanced Visible-Light Activity of Titania via Confinement inside Carbon Nanotubes

被引：99

作者：

Chen, Wei ^{[1
]}

Fan, Zhongli ^{[1
]}

Zhang, Bei ^{[2
]}

Ma, Guijun ^{[1
]}

Takanabe, Kazuhiro ^{[1
]}

Zhang, Xixiang ^{[2
]}

Lai, Zhiping ^{[1
]}

机构：

[1] King Abdullah Univ Sci & Technol, Chem & Life Sci & Engn Div, Thuwal, Saudi Arabia

[2] King Abdullah Univ Sci & Technol, Imaging & Characterizat Lab, Thuwal, Saudi Arabia

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2011年 / 133卷 / 38期

关键词：

RAMAN-SPECTRUM; NANOPHASE TIO2; PHOTOCATALYST; NANOPARTICLES; NANOMATERIALS; SPECTROSCOPY; PERFORMANCE; COMPOSITES; PARTICLES; CHEMISTRY;

D O I：

10.1021/ja205997x

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Titania confined inside carbon nanotubes (CNTs) was synthesized using a restrained hydrolysis method. Raman spectra and magnetic measurements using a SQUID magnetometer suggested the formation of remarkable oxygen vacancies over the encapsulated TiO2 in comparison with nanoparticles dispersed on the outer surface of CNTs, extending the photoresponse of TiO2 from the UV to the visible-light region. The CNT-confined TiO2 exhibited improved visible-light activity in the degradation of methylene blue (MB) relative to the outside titania and commercial P25, which is attributed to the modification of the electronic structure of TiO2 induced by the unique confinement inside CNTs. These results provide further insight into the effect of confinement within CNTs, and the composites are expected to be promising for applications in visible-light photocatalysis.

引用

页码：14896 / 14899

页数：4

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