Issue 5, 2002
From the journal:

Journal of Materials Chemistry

Tomoki Tsumura,*a   Naoko Kojitani,a   Ikuichiro Izumi,b   Norio Iwashita,c   Masahiro Toyodad  and  Michio Inagakie  

* Corresponding authors

a Group 2, NARD Institute Co. Ltd., 2-6-1 Nishinagasu, Amagasaki, Japan
E-mail: tsumura@nard.co.jp
Fax: +81-6-6482-8502
Tel: +81-6-6482-7012

b Nara National College of Technology, Yata, Yamatokoriyama, Japan

c National Institute of Advanced Industrical Science & Technology (AIST), Kansai Center, Midorigaoka, Ikeda, Japan

d Fukui National College of Technology, Geshi, Sabae, Japan

e Aichi Institute of Technology, Yakusa, Toyota, Japan

Abstract

Carbon coating of photocatalytic anatase-type TiO2 powders was successfully carried out by heating a powder mixture of poly(vinyl alcohol) and TiO2 under N2 gas flow at temperatures above 700 °C. All particles of TiO2 were covered by a carbon layer and looked black. For methylene blue (MB) in aqueous solution, carbon-coated anatase powders thus prepared showed marked adsorption and decomposition under UV irradiation and were confirmed to keep almost the same photoactivity as that without any carbon coating. Carbon coating of anatase-type TiO2 was found to give different merits for photoactive performance; suppression of phase transformation from anatase to rutile at high temperatures, quick adsorption of MB into the carbon layer, decomposition of adsorbed MB by TiO2 and prevention of the interaction of TiO2 with binder resin. Repeated cycles of adsorption and decomposition of methylene blue in aqueous solution were experimentally confirmed.

Graphical abstract: Carbon coating of anatase-type TiO2 and photoactivity

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Article information

DOI
https://doi.org/10.1039/B201942F
Article type
Paper
Submitted
22 Feb 2002
Accepted
04 Mar 2002
First published
03 Apr 2002

J. Mater. Chem., 2002,12, 1391-1396

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Carbon coating of anatase-type TiO2 and photoactivity

T. Tsumura, N. Kojitani, I. Izumi, N. Iwashita, M. Toyoda and M. Inagaki, J. Mater. Chem., 2002, 12, 1391 DOI: 10.1039/B201942F

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