期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 37, 期 10, 页码 8249-8256出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2012.02.057
关键词
Bi2S3 loaded TiO2; Photocatalysis; Methanol/water photo splitting; H-2 production; Band gap
资金
- National Research Foundation of Korea (NRF)
- Korea government (MEST) [2011-0003286]
- National Research Foundation of Korea [2009-0064865] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
A new system using Bi2S3-loaded TiO2 photocatalysts (Bi2S3/TiO2) was developed to enhance the production of hydrogen. The Bi2S3 (5, 10, 15 wt%) particles in an urchin-like morphology with a length of about 2 similar to 3 mu m and a diameter of 15-20 nm, which can absorb all wavelengths in UV-visible radiation, were prepared by solvothermal method and loaded onto nano-sized TiO2 (10 similar to 45 nm) for photocatalysis on hydrogen production. The evolution of H-2 from methanol/water (1:1) photo splitting over the Bi2S3/TiO2 composite in the liquid system was enhanced, compared with that over pure TiO2 and Bi2S3. In particular, 14.2 ml of H-2 gas was produced after 12 h when 0.5 g of a 10 wt% Bi2S3/TiO2 composite was used. On the basis of cyclic voltammetry (CV) results, the high photoactivity was attributed to the increase of band gap in the Bi2S3/TiO2 composite, due to the decreased recombination between the excited electrons and holes. Copyright (C) 2012, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
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