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Issue 2, 2012
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Tin oxide-surface modified anatase titanium(iv) dioxide with enhanced UV-light photocatalytic activity

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Abstract

[Sn(acac)2]Cl2 is chemisorbed on the surfaces of anatase TiO2via ion-exchange between the complex ions and H+ released from the surface Ti–OH groups without liberation of the acetylacetonate ligand (Sn(acac)2/TiO2). The post-heating at 873 K in air forms tin oxide species on the TiO2 surface in a highly dispersed state on a molecular scale ((SnO2)m/TiO2). A low level of this p block metal oxide surface modification (∼0.007 Sn ions nm−2) accelerates the UV-light-activities for the liquid- and gas-phase reactions, whereas in contrast to the surface modification with d block metal oxides such as FeOx and NiO, no visible-light response is induced. Electrochemical measurements and first principles density functional theory (DFT) calculations for (SnO2)m/TiO2 model clusters (m = 1, 2) indicate that the bulk (TiO2)-to-surface interfacial electron transfer (BS-IET) enhances charge separation and the following electron transfer to O2 to increase the photocatalytic activity.

Graphical abstract: Tin oxide-surface modified anatase titanium(iv) dioxide with enhanced UV-light photocatalytic activity

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Article information


Submitted
24 Aug 2011
Accepted
28 Oct 2011
First published
16 Nov 2011

Phys. Chem. Chem. Phys., 2012,14, 705-711
Article type
Paper

Tin oxide-surface modified anatase titanium(IV) dioxide with enhanced UV-light photocatalytic activity

M. Fujishima, Q. Jin, H. Yamamoto, H. Tada and M. Nolan, Phys. Chem. Chem. Phys., 2012, 14, 705
DOI: 10.1039/C1CP22708D

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