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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 which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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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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