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Defects enhanced photocatalytic performances in SrTiO3 using laser-melting treatment

Published online by Cambridge University Press:  13 December 2016

Liu Gu ,
Hehe Wei ,
Zhijian Peng  and
Hui Wu
Liu Gu
Affiliation:
School of Engineering and Technology, China University of Geosciences, Beijing 100083, People’s Republic of China; and State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, People’s Republic of China
Hehe Wei
Affiliation:
State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, People’s Republic of China
Zhijian Peng*
Affiliation:
School of Engineering and Technology, China University of Geosciences, Beijing 100083, People’s Republic of China
Hui Wu*
Affiliation:
State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, People’s Republic of China
*
a) Address all correspondence to these authors. e-mail: pengzhijian@cugb.edu.cn
b) e-mail: wuhui@tsinghua.edu.cn
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Abstract

SrTiO3 is an important photocatalyst for hydrogen evolution under solar light, a promising way to solve energy shortage. However, a rapid and efficient method to synthesize high-performance SrTiO3 used for this purpose still remains a challenge. In this work, we successfully prepared SrTiO3 catalyst with narrowed band gap through a rapid laser-melting method of a limited reaction time to seconds. The prepared SrTiO3 catalyst, which has a band gap of 3.05 eV, presents enhanced photocatalytic performance for hydrogen evolution under visible light. The evolution rate of laser-melted SrTiO3 is approximately 3.5 times higher than that of pristine SrTiO3. In addition, the magnetism in laser-melted SrTiO3 is also enhanced, which could not be observed in pristine SrTiO3, confirming the defective structure of the obtained laser-melted SrTiO3. The proposed laser-melting method will be a promising way to rapidly and efficiently synthesize homogeneous, solar-driven SrTiO3 photocatalyst for hydrogen evolution with rich defects and thus high-performance.

Keywords

SrTiO3defectsphotocatalytic activityhydrogen evolutionlaser-melting
Type
Articles
Information
Journal of Materials Research , Volume 32 , Issue 4 , 28 February 2017 , pp. 748 - 756
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Copyright
Copyright © Materials Research Society 2016 

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Footnotes

Contributing Editor: Xiaobo Chen

References

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