Journal
CERAMICS INTERNATIONAL
Volume 44, Issue 3, Pages 2709-2717Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2017.10.225
Keywords
Cr(VI) treatment; CeO2; TiO2; Photocatalysis; Nanocomposite
Categories
Funding
- National Natural Science Foundation of China [51368044, 51668046, 51568051]
- National Science Fund for Excellent Young Scholars [51422807]
- Science and Technology Supporting Program of Jiangxi Province [20151BBG70018]
- Natural Science Foundation of Jiangxi province [20162BCB23041, 20161BAB216102]
- Science Foundation for Young Scientists of Jiangxi Province-Key project [20171ACB21034]
- Jiangxi Provincial Education Department [GJJ160700]
- Jiangxi Province Educational Reform Project [JXJG-16-8-7]
- Nanchang Hangkong University Educational Reform Project [JY1604, JY1605, KCPY-1511]
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In this study, a novel CeO2-TiO2 nanocomposite denoted as CeO2-3TiO(2) was successfully synthesized via a facile one pot hydro-thermal method without alkali. It exhibits high photocatalytic reduction reactivity toward Cr(VI) under visible light. The photocatalytic reactivity of CeO2-3TiO(2) is 18 times higher than that of pure CeO2, 28 times higher than pure TiO2, 15 times higher than the sample of simply mixed CeO2 and TiO2. The solution with Cr(VI) initial concentration of 2780 ppb can be fast photoreduced by CeO2-3TiO(2) in 60 min under visible light to meet the criterion of U.S. Environmental protection Agency. Characterization results indicate CeO2-3TiO(2) has the good crystal form of heterojunction structure, narrow pore size distribution, narrow energy gap and high photogenerated electron-hole separation efficiency. Based on the experimental results, a speculated photo catalytic mechanism was proposed.
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