1. C-doped hollow TiO2 spheres: in situ synthesis, controlled shell thickness, and superior visible-light photocatalytic activity.
- Author
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Zhang, Ying, Zhao, Zhiyuan, Chen, Juanrong, Cheng, Li, Chang, Jun, Sheng, Weichen, Hu, Changyuan, and Cao, Shunsheng
- Subjects
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TITANIUM dioxide , *CARBON , *DOPING agents (Chemistry) , *VISIBLE spectra , *PHOTOCATALYSTS , *CATALYTIC activity , *INORGANIC synthesis - Abstract
The persistent efforts have been paid to shift the ultraviolet of titania to visible-light-driven photocatalysis. In this work, we explored a facile, cost-effective method to in situ create C-doped hollow TiO 2 spheres. This method involved the preparation of monodisperse cationic polystyrene spheres (CPS), sequential deposition of TiO 2 precursor via template-directed self-assembly, and the removal of CPS template by calcination at 450 °C. The structure and properties of hollow TiO 2 catalysts were characterized by N 2 desorption–adsorption, X-ray diffraction (XRD), UV–vis spectroscopy, and X-ray photoelectron spectroscopy (XPS). Results confirmed the carbon doping in the as-prepared hollow TiO 2 lattice. When C-doped hollow TiO 2 spheres were used as photocatalysts for the degradation of Rhodamine B under visible-light irradiation, the as-synthesized hollow anatase exhibited a superior photocatalytic activity than the commercial P25 and many TiO 2 -based photocatalysts reported in literature, significantly broadening its potential for many practical applications. [ABSTRACT FROM AUTHOR]
- Published
- 2015
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