期刊
JOURNAL OF CATALYSIS
卷 294, 期 -, 页码 37-46出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcat.2012.07.004
关键词
Ammonium fluoride; Isopropyl alcohol; Mesocellular foams; Titanium oxide; Photocatalyst; Fluorination; Ti3+; Superhydrophobic; Photocatalytic activity
资金
- National Nature Science Foundation of China [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
NH4F was used instead of conventional organic silylation agent as the hydrophobic modifier to synthesize the super-hydrophobic mesocellular foams (MCF) loaded with nano-sized TiO2 photocatalysts in its pore channels, which could be considered as an extractant for organics. Compared to organosilane modified catalysts, NH4F-modified MCF/TiO2 has a more stable super-hydrophobic property and much higher photocatalytic activity. It was found that only using isopropanol as the solvent, the NH4F-modified catalyst showed super-hydrophobic property. It is believed that the solvent plays a role in controlling the exchange between surface OH groups and F ions. The special structure of supported mesoporous catalyst greatly facilitated the surface fluorination, which together with the Ti3+ generation led to its excellent adsorption capacity and UV/visible light photocatalytic activity. This novel super-hydrophobic mesoporous photocatalyst has a large application potential in the field of photocatalysis, shipbuilding, and other industries. (C) 2012 Elsevier Inc. All rights reserved.
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