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

Catalysts

Qiliang Jin¹  Hiroshi Arimoto¹  Musashi Fujishima¹ 

[1]Department of Applied Chemistry, School of Science and Engineering, Kinki University, 3-4-1, Kowakae, Higashi-Osaka, Osaka 577-8502, Japan

关键词: titanium dioxide;    manganese oxides;    surface modification;    thermocatalytic activity;    photocatalytic activity;    environmental catalyst;   

DOI  :  10.3390/catal3020444

来源: mdpi

【 摘 要 】

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 MnO_x 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 (MnO_x/TiO₂). The thermo- and photo-catalytic activities of MnO_x/TiO₂ were studied for the degradation of 2-naphthol used as a model water pollutant. In contrast to the FeO_x/TiO₂ system, MnO_x/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 MnO_x clusters, whereas its UV-light activity decreases.

【 授权许可】

CC BY   
© 2013 by the authors; licensee MDPI, Basel, Switzerland.