期刊
NEW JOURNAL OF CHEMISTRY
卷 37, 期 8, 页码 2582-2588出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3nj00003f
关键词
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资金
- National Natural Science Foundation of China [21175155]
Uniformly carbonaceous and nitrogenous species sensitized TiO2 quantum dots (QDs, similar to 4 nm) were synthesized through an improved strategy employing an oleic acid and oleylamine system, and were further assembled into the mesoporous structure of C/N-TiO2 nanospheres via an emulsion-based bottom-up self-assembly (EBS). EBS not only transformed oil-soluble C/N-TiO2 QDs into water-soluble nanospheres, but also assembled them into mesostructures with an average diameter around 200 nm. The photocatalytic properties of the as-prepared C/N-TiO2 QDs and C/N-TiO2 nanospheres were evaluated by measuring the photodegradation of rhodamine B (RhB) under visible-light irradiation. Compared to C/N-TiO2 QDs and commercial product P25, the experimental results showed that the water miscible mesostructured C/N-TiO2 nanospheres with improved effective catalytic area and RhB adsorption, and a red shift of the absorption edge to the visible light region, possessed improved photocatalytic activity. The purpose of this study is to illustrate the importance of C/N-species sensitization and fundamental structural control in effecting the photodegradation property of TiO2-based catalysts.
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