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Rapid Synthesis of C-TiO2: Tuning the Shape from Spherical to Rice Grain Morphology for Visible Light Photocatalytic Application
Anupama Surenjan, ,
Published in American Chemical Society
2015
Volume: 3
   
Issue: 7
Pages: 1321 - 1329
Abstract
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 (Egap) 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 m2/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. (Graph Presented.) © 2015 American Chemical Society.
About the journal
JournalData powered by TypesetACS Sustainable Chemistry and Engineering
PublisherData powered by TypesetAmerican Chemical Society
ISSN21680485
Open AccessNo
Concepts (25)
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    Activated carbon treatment
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    Amides
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    ENDOCRINE DISRUPTERS
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    Energy gap
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    Light
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    Morphology
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    Particle size
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    Photocatalysis
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    Pollution
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    Pollution control
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    Scanning electron microscopy
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    Spectroscopic analysis
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    Spheres
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    Water pollution
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    Water pollution control
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    Water treatment
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    CARBAMAZEPINE
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    Microwave synthesis
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    MORPHOLOGY CONTROL
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    Photocatalytic application
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    RAMAN SPECTROSCOPIC STUDY
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    Thermodynamically stable
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    Tio
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    X-ray photoelectrons
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    Grain (agricultural product)