期刊
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
卷 4, 期 22, 页码 3910-3917出版社
AMER CHEMICAL SOC
DOI: 10.1021/jz4021102
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类别
资金
- National Nature Science Foundation of China [2013CB632403, 21237003, 21073060, 21203062]
- National Basic Research Program of China (973 Program) [2010CB732306, 2011CB808505]
- Project of International Cooperation of the Ministry of Science and Technology of China [2011DFA50530]
- Science and Technology Commission of Shanghai Municipality [12230705000]
- Program of Shanghai Subject Chief Scientist [12XD1402200]
- Fundamental Research Funds for the Central Universities
Although the preparation of TiO2 exposed with high-energy facets is a challenge, these facets have a large application potential in the loading of Au nanoparticles. We successfully prepared TiO2 single crystals exposed with (001) and (110) facets as an ideal support to load the highly dispersed nanosized Au particles to improve the stability of Au on the catalyst surface and expand its photocatalytic applications. The transfer of photoexcited electrons from the higher-surface-energy facet, that is, (001) and (110), to the lower-energy facet of (101) could make the electrons aggregate on the (101) facet and leave holes on the (001) and (110) facets, which would promote the separation of electrons and holes. The highly dispersed Au nanoparticles also could capture the electrons from active facets and further improve the photocatalytic activity of TiO2. Systematic density functional theory calculation was also carried out to investigate the formation of (001) and (110) facets.
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