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Catalysts 2013, 3(2), 444-454; doi:10.3390/catal3020444
Article

Manganese Oxide-Surface Modified Titanium (IV) Dioxide as Environmental Catalyst

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Department of Applied Chemistry, School of Science and Engineering, Kinki University, 3-4-1, Kowakae, Higashi-Osaka, Osaka 577-8502, Japan
* Author to whom correspondence should be addressed.
Received: 23 December 2012 / Revised: 10 April 2013 / Accepted: 12 April 2013 / Published: 23 April 2013
(This article belongs to the Special Issue Photocatalysts)
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Abstract

The purpose of this study is to present an “environmental catalyst” possessing both thermocatalytic activity and visible-light activity for the decomposition of organic pollutants. Molecule-sized MnOx clusters are highly dispersed on the surface of TiO2 (anatase/rutile = 4/1 w/w, P-25, Degussa) by the chemisorption-calcination cycle technique using Mn(acac)3 complex as a precursor (MnOx/TiO2). The thermo- and photo-catalytic activities of MnOx/TiO2 were studied for the degradation of 2-naphthol used as a model water pollutant. In contrast to the FeOx/TiO2 system, MnOx/TiO2 exhibits high thermocatalytic activity exceeding those of bulk β-β-MnO2 and Mn2O3. Also, visible-light activity is induced by the surface modification of TiO2 with MnOx clusters, whereas its UV-light activity decreases.
Keywords: titanium dioxide; manganese oxides; surface modification; thermocatalytic activity; photocatalytic activity; environmental catalyst titanium dioxide; manganese oxides; surface modification; thermocatalytic activity; photocatalytic activity; environmental catalyst
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).
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Jin, Q.; Arimoto, H.; Fujishima, M.; Tada, H. Manganese Oxide-Surface Modified Titanium (IV) Dioxide as Environmental Catalyst. Catalysts 2013, 3, 444-454.

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