Efficient Promotion of Anatase TiO2 Photocatalysis via Bifunctional Surface-Terminating Ti-O-B-N Structures

Liu, G., Sun, C., Cheng,L, Jin, Y., Lu, H., Wang, L., Smith, S., Lu, G. and Cheng, H. M. (2009) Efficient Promotion of Anatase TiO2 Photocatalysis via Bifunctional Surface-Terminating Ti-O-B-N Structures. JOURNAL OF PHYSICAL CHEMISTRY C, 113 28: 12317-12324. doi:10.1021/jp900511u


Author Liu, G.
Sun, C.
Cheng,L
Jin, Y.
Lu, H.
Wang, L.
Smith, S.
Lu, G.
Cheng, H. M.
Title Efficient Promotion of Anatase TiO2 Photocatalysis via Bifunctional Surface-Terminating Ti-O-B-N Structures
Journal name JOURNAL OF PHYSICAL CHEMISTRY C   Check publisher's open access policy
ISSN 1932-7447
Publication date 2009-05-26
Year available 2009
Sub-type Article (original research)
DOI 10.1021/jp900511u
Volume 113
Issue 28
Start page 12317
End page 12324
Total pages 8
Editor Schatz, G.C.
Place of publication United States
Publisher American Chemical Society
Collection year 2010
Language eng
Subject C1
090499 Chemical Engineering not elsewhere classified
850599 Renewable Energy not elsewhere classified
Abstract The surface structures of doped semiconductor photocatalysts play a vital role in determining visible light absorbance, transfer and redox potentials of charge carriers, as well as the inhibition of recombination. We examine the photocatalysis of anatase TiO2 with surface terminating Ti-O-B-N structures from both experimental and computational perspectives. This codoped titania system shows much better photocatalytic activity in generating center dot OH radical species and degrading organic pollutants in comparison with B-doped anatase titania. We present indicative evidence that the Ti-O-B-N surface structures can exhibit bifunctionality in promoting photocatalysis, (i) supplying partially occupied localized states attributed to B-N coupling with spectral distribution that is advantageous for enhancing visible light absorption and (ii) acting as photocatalytic "hot sites" to support localization and separation of charge carriers at the surface. These results offer important implications for designing highly efficient photocatalysts based on codoping strategies.
Keyword VISIBLE-LIGHT IRRADIATION
Q-Index Code C1
Q-Index Status Confirmed Code

 
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Created: Thu, 03 Sep 2009, 07:47:40 EST by Mr Andrew Martlew on behalf of Aust Institute for Bioengineering & Nanotechnology