期刊
JOURNAL OF CATALYSIS
卷 297, 期 -, 页码 236-243出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcat.2012.10.014
关键词
Ti3+ self-doped; Titanium oxide; Photocatalyst; NaBH4; HCI washing; NaBO2; Carbonaceous impurities; Photocatalytic activity
资金
- National Nature Science Foundation of China [21237003, 20977030, 21173077]
- National Basic Research Program of China [2010CB732306]
- Project of International Cooperation of the Ministry of Science and Technology of China [2011DFA50530]
- Science and Technology Commission of Shanghai Municipality [10JC1403900, 12XD1402200]
- Fundamental Research Funds for the Central Universities
A series of TiO2 catalysts self-doped with Ti3+ were successfully synthesized by a simple one-step solvo-thermal method with low-cost NaBH4 added as a reductant. During NaBH4 reduction, large amounts of NaBO2 and carbonaceous impurities covered the surface of the TiO2 self-doped with Ti3+, resulting in an inhibition of visible-light absorption and photocatalytic activity. In the preparation, HCl solution was used to wash off the by-product NaBO2 and carbonaceous impurities coated on the surface of the catalysts. The samples were characterized by XRD, UV-DRS, ESR, XPS, and FT-IR analyses. After HCl washing, the photocatalytic activity of the Ti3+-doped TiO2 increased markedly, while the Ti3+ content remained the same. Furthermore, it was found that the visible-light photocatalytic activity of Ti3+-doped TiO2 depended on the amount of Ti3+ added, while there was no significant impact of Ti3+ doping on its UV-light photocatalytic activity. (c) 2012 Elsevier Inc. All rights reserved.
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