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Novel core-shell structured mesoporous titania microspheres: Preparation, characterization and excellent photocatalytic activity in phenol abatement

Paper ID Volume ID Publish Year Pages File Format Full-Text
27727 44039 2008 11 PDF Available
Title
Novel core-shell structured mesoporous titania microspheres: Preparation, characterization and excellent photocatalytic activity in phenol abatement
Abstract

Thermally stable mesoporous core-shell structured nanocrystallite titanium dioxide (TiO2) microspheres were prepared by a novel hydro-alcohol thermal method. Anatase powders were synthesized under hydrothermal condition at 368 K from aqueous titania tetrachloride solution with the presence of urea and ammonium sulfate, then the samples were annealed at various temperatures before testing their photocatalytic activity. The morphology and microstructure characteristics of TiO2 microspheres series were characterized by means of the specific surface area (BET), transmission electron microscopy (TEM), scanning electron microscopy (SEM), differential thermal analysis (DTA), photoluminescence spectra (PLS), X-ray photoelectron spectroscopy (XPS) and X-ray powder diffraction (XRD). The specific microsphere structures were maintained after a heat treatment at 973 K for 3 h, exhibiting a significant thermal stability. The photocatalytic activity was measured in a reactor with ultraviolet lamps. The catalysts show considerably high catalytic activity and recyclability during the photodegradation of phenol in aqueous suspension, the microsphere titania sample calcinated under 733 K for 3 h shows the best photocatalytic activity. The results obtained with this novel photocatalyst are compared with the behavior of the well-studied and widely used Degussa P25 TiO2 under the same conditions.

Keywords
Titanium dioxide; Titanium tetrachloride; Microspheres; Photodegradation; Phenol
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Novel core-shell structured mesoporous titania microspheres: Preparation, characterization and excellent photocatalytic activity in phenol abatement
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 195, Issues 2–3, 15 April 2008, Pages 284–294
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
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Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
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Any Questions? feel free to contact us