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Issue 10, 2013
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Visible-light photocatalytic, solar thermal and photoelectrochemical properties of aluminium-reduced black titania†

Zhou Wang,ab   Chongyin Yang,ab   Tianquan Lin,ab   Hao Yin,a   Ping Chen,a   Dongyun Wan,a   Fangfang Xu,a   Fuqiang Huang,*ab   Jianhua Lin,b   Xiaoming Xiec  and  Mianheng Jiangc  
Author affiliations

* Corresponding authors

a CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
E-mail: huangfq@mail.sic.ac.cn

b Beijing National Laboratory for Molecular Sciences, College of Chemi stry and Molecular Engineering, Peking University, Beijing 100871, China

c State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China

Abstract

Utilizing solar energy for hydrogen generation and water cleaning is a great challenge due to insufficient visible-light power conversion. Here we report a mass production approach to synthesize black titania by aluminium reduction. The obtained sample possesses a unique crystalline core–amorphous shell structure (TiO2@TiO2−x). The black titania absorbs ∼65% of the total solar energy by improving visible and infrared absorption, superior to the recently reported ones (∼30%) and pristine TiO2 (∼5%). The unique core–shell structure (TiO2@TiO2−x) and high absorption boost the photocatalytic water cleaning and water splitting. The black titania is also an excellent photoelectrochemical electrode exhibiting a high solar-to-hydrogen efficiency (1.7%). A large photothermic effect may enable black titania “capture” solar energy for solar thermal collectors. The Al-reduced amorphous shell is proved to be an excellent candidate to absorb more solar light and receive more efficient photocatalysis.

Graphical abstract: Visible-light photocatalytic, solar thermal and photoelectrochemical properties of aluminium-reduced black titania

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Article information

https://doi.org/10.1039/C3EE41817K
Submitted
27 May 2013
Accepted
15 Jul 2013
First published
16 Jul 2013
Energy Environ. Sci., 2013,6, 3007-3014
Article type
Paper
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Visible-light photocatalytic, solar thermal and photoelectrochemical properties of aluminium-reduced black titania

Z. Wang, C. Yang, T. Lin, H. Yin, P. Chen, D. Wan, F. Xu, F. Huang, J. Lin, X. Xie and M. Jiang, Energy Environ. Sci., 2013, 6, 3007
DOI: 10.1039/C3EE41817K

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