Effective water splitting using CuOx/TiO2 composite films: Role of Cu species and content in hydrogen generation

Effective water splitting using CuOx/TiO2 composite films: Role of Cu species and content in... Article history: We have fabricated a series of CuO /TiO composite films composed of TiO nanorods and CuO nanoparit- x 2 2 x Received 4 January 2016 icles with copper content in the range of 0–4.75 at.% by a facile magnetron sputtering method for hydrogen Received in revised form 27 January 2016 generation from water splitting. By virtue of the one-dimensional TiO nanostructures, all the nanorods Accepted 30 January 2016 films show excellent photocatalytic activity. Especially, there appear to be an optimum Cu content of Available online 2 February 2016 −2 −1 2.72 at.% giving the H evolution rate of 53 mmol m h , which is about 15 times higher than that of pristine anatase TiO nanorods film. To evaluate the effect of foreign copper on the photocatalytic proper- Keywords: ties, comprehensive structural, morphology and surface characterizations of catalysts have been carried TiO nanorods out. It is found that CuO is an unstable species which is inevitably reduced to Cu O during the initial Copper stage of photocatalytic reaction, and the occurrence of highly disperse Cu O species is responsible for the Efficient water splitting improved photocatalytic activity. © 2016 Elsevier B.V. All rights reserved. 1. Introduction The http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Applied Surface Science Elsevier

Effective water splitting using CuOx/TiO2 composite films: Role of Cu species and content in hydrogen generation

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Publisher
Elsevier
Copyright
Copyright © 2016 Elsevier B.V.
ISSN
0169-4332
eISSN
1873-5584
D.O.I.
10.1016/j.apsusc.2016.01.281
Publisher site
See Article on Publisher Site

Abstract

Article history: We have fabricated a series of CuO /TiO composite films composed of TiO nanorods and CuO nanoparit- x 2 2 x Received 4 January 2016 icles with copper content in the range of 0–4.75 at.% by a facile magnetron sputtering method for hydrogen Received in revised form 27 January 2016 generation from water splitting. By virtue of the one-dimensional TiO nanostructures, all the nanorods Accepted 30 January 2016 films show excellent photocatalytic activity. Especially, there appear to be an optimum Cu content of Available online 2 February 2016 −2 −1 2.72 at.% giving the H evolution rate of 53 mmol m h , which is about 15 times higher than that of pristine anatase TiO nanorods film. To evaluate the effect of foreign copper on the photocatalytic proper- Keywords: ties, comprehensive structural, morphology and surface characterizations of catalysts have been carried TiO nanorods out. It is found that CuO is an unstable species which is inevitably reduced to Cu O during the initial Copper stage of photocatalytic reaction, and the occurrence of highly disperse Cu O species is responsible for the Efficient water splitting improved photocatalytic activity. © 2016 Elsevier B.V. All rights reserved. 1. Introduction The

Journal

Applied Surface ScienceElsevier

Published: Apr 30, 2016

References

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