Visible-light photocatalytic, solar thermal and photoelectrochemical properties of aluminium-reduced black titania
2013; Royal Society of Chemistry; Volume: 6; Issue: 10 Linguagem: Inglês
10.1039/c3ee41817k
ISSN1754-5706
AutoresZhou Wang, Chongyin Yang, Tianquan Lin, Hao Yin, Ping Chen, Dongyun Wan, Fangfang Xu, Fuqiang Huang, Jianhua Lin, Xiaoming Xie, Mianheng Jiang,
Tópico(s)Copper-based nanomaterials and applications
ResumoUtilizing 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.
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