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Simple fabrication of twist-like helix N,S-codoped titania photocatalyst with visible-light response

Paper ID Volume ID Publish Year Pages File Format Full-Text
48423 46506 2008 9 PDF Available
Title
Simple fabrication of twist-like helix N,S-codoped titania photocatalyst with visible-light response
Abstract

Visible-light responsible N,S-codoped titania photocatalyst was fabricated by simple hydrolysis of titania tetrachloride using ammonia in the presence of glacial acetic acid and ammonium sulfate. The N,S-codoped titania materials were fabricated by a template-free route and demonstrated twist-like helix morphology. The morphology and microstructure characteristics of N,S-codoped titania photocatalysts were characterized by means of the N2 adsorption–desorption measurements, thermal gravimetric and differential thermal analysis (TG-DTA), transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FT-IR), UV–visible diffuse reflectance spectra (DRS) and X-ray powder diffraction (XRD). The unique morphology of N,S-codoped titania materials and mesoporous microstructure were maintained after a heat treatment at 723 K for 3 h, exhibiting significantly thermal stability. The photocatalytic activity was evaluated by degrading phenol in aqueous suspension under ultraviolet and visible light irradiation. The results obtained with these novel photocatalysts are compared with the behavior of the well-studied and widely used Degussa P25 TiO2 under the same conditions. The N,S-codoped titania samples were more superior than P25 and the sample calcined under 723 K for 3 h shows the best photocatalytic activity, the higher activity of which could be attributed to its high surface area, large pore volume, well-crystallized anatase, red-shift in adsorption edge and strong absorbance of light with longer wavelength.

Keywords
Titanium dioxide; Titanium tetrachloride; Mesoporous; Visible-light; N,S-codoped; Photocatalyst
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Simple fabrication of twist-like helix N,S-codoped titania photocatalyst with visible-light response
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 79, Issue 1, 21 February 2008, Pages 72–80
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
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
Online Support
Any Questions? feel free to contact us