期刊
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
卷 3, 期 7, 页码 1321-1329出版社
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.5b00044
关键词
Carbon loaded TiO2; Microwave synthesis; Morphology control; Photocatalysis; Water pollution; Carbamazepine
资金
- Department of Science and Technology, Government of India
- Indian Institute of Technology Madras
Visible light-active carbon-loaded anatase TiO2 (C-TiO2) nanocrystals of spherical, distorted spherical, rice grain and hexagonal morphologies, with a particle size range of 50-70 nm, have been synthesized by a rapid microwave-assisted route in the solution state. The morphology of these materials is greatly tuned at low concentrations of the precursors used. The absorption band gaps (E-gap) are shifted to the visible region due to C loading, and the distorted spherical C-TiO2 exhibits a maximum energy shift relative to pure TiO2. Carbon gets deposited predominantly on the surface as graphitic carbon, in the preparative conditions, as confirmed by X-ray photoelectron, scanning electron microscopy elemental mapping and Raman spectroscopic studies. The rapid degradation of an endocrine disrupting agent and a persistent pollutant in wastewater, carbamazepine, by the rice grain shaped C-TiO2 is attributed to the large surface area (229 m(2)/g) of the particles and coexposure of the high surface energy and more reactive {001} facets along with the low energy and thermodynamically stable {101} facets.
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