Preparation of titania/carbon nanotube composites using supercritical ethanol and their photocatalytic activity for phenol degradation under visible light irradiation

被引：367

作者：

An, Guimin ^{[1
]}

Ma, Wanhong ^{[1
]}

Sun, Zhenyu ^{[1
]}

Liu, Zhimin ^{[1
]}

Han, Buxing ^{[1
]}

Miao, Shiding ^{[1
]}

Miao, Zhenjiang ^{[1
]}

Ding, Kunlun ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Chem, Ctr Mol Sci, BNLMS, Beijing 100080, Peoples R China

来源：

CARBON | 2007年 / 45卷 / 09期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1016/j.carbon.2007.04.034

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Titanium dioxide (anatase, TiO2) nanoparticles have been successfully deposited onto multi-walled carbon nanotubes (MWCNTs) via hydrolysis of titanium isopropoxide in supercritical ethanol. The as-prepared composites were characterized by X-ray diffraction, transmission electron microscopy and X-ray photoelectron spectroscopy. It was demonstrated that the MWCNTs were decorated with welldispersed anatase nanoparticles less than 7 nm in diameter. The size and loading content of the nanoparticles on MWCNTs could be tuned by manipulating the ratio of precursor to MWCNTs, and the formation mechanism of the composites was also discussed. The absorbance spectrum of the resultant TiO2/MWCNT composites extended to the whole UV-visible region due to the decoration of TiO2 on MWCNTs. The TiO2/MWCNT composites were used as photocatalyst for phenol degradation under irradiation of visible light, which showed higher efficiency compared to a mixture of TiO2 and MWCNTs. (c) 2007 Elsevier Ltd. All rights reserved.

引用

页码：1795 / 1801

页数：7

共 46 条

[1] CARBON NANOTUBES AS REMOVABLE TEMPLATES FOR METAL-OXIDE NANOCOMPOSITES AND NANOSTRUCTURES [J].

AJAYAN, PM ;

STEPHAN, O ;

REDLICH, P ;

COLLIEX, C .

NATURE, 1995, 375 (6532) :564-567

[2] Nanotubes from carbon [J].

Ajayan, PM .

CHEMICAL REVIEWS, 1999, 99 (07) :1787-1799

[3] Photocatalytic reactions involving hydroxyl radical attack - I. Reaction kinetics formulation with explicit photon absorption effects [J].

Alfano, OM ;

Cabrera, MI ;

Cassano, AE .

JOURNAL OF CATALYSIS, 1997, 172 (02) :370-379

[4]

Barbe CJ, 1997, J AM CERAM SOC, V80, P3157, DOI 10.1111/j.1151-2916.1997.tb03245.x

[5] Carbon nanotubes - the route toward applications [J].

Baughman, RH ;

Zakhidov, AA ;

de Heer, WA .

SCIENCE, 2002, 297 (5582) :787-792

[6] Adsorption and photoactivity of tetra(4-carboxyphenyl)porphyrin (TCPP) on nanoparticulate TiO2 [J].

Cherian, S ;

Wamser, CC .

JOURNAL OF PHYSICAL CHEMISTRY B, 2000, 104 (15) :3624-3629

[7] Comparative studies of phenol and salicylic acid photocatalytic degradation: influence of adsorbed oxygen [J].

Chhor, K ;

Bocquet, JF ;

Colbeau-Justin, C .

MATERIALS CHEMISTRY AND PHYSICS, 2004, 86 (01) :123-131

[8] Percolation-dominated conductivity in a conjugated-polymer-carbon-nanotube composite [J].

Coleman, JN ;

Curran, S ;

Dalton, AB ;

Davey, AP ;

McCarthy, B ;

Blau, W ;

Barklie, RC .

PHYSICAL REVIEW B, 1998, 58 (12) :R7492-R7495

[9]

COTTON FA, 1988, ADV INORG CHEM, P654

[10] PREPARATION AND CHARACTERIZATION OF TIO2 AEROGELS FOR USE AS PHOTOCATALYSTS [J].

DAGAN, G ;

TOMKIEWICZ, M .

JOURNAL OF NON-CRYSTALLINE SOLIDS, 1994, 175 (2-3) :294-302

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