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Influence of Zr as TiO2 doping ion on photocatalytic degradation of 4-chlorophenol

Paper ID Volume ID Publish Year Pages File Format Full-Text
48759 46521 2007 9 PDF Available
Title
Influence of Zr as TiO2 doping ion on photocatalytic degradation of 4-chlorophenol
Abstract

Nanosized Zr-doped TiO2 photocatalysts were prepared using the homogenous co-precipitation method from aqueous solutions containing TiOSO4 and ZrCl4 by urea as a precipitation agent, with subsequently annealing at various temperatures of 400–1100 °C. Structural changes of the photocatalysts upon heating were studied by X-ray powder diffraction. Anatase-to-rutile phase transformation is shifted to higher temperatures in comparison with undoped TiO2. Spherical clusters morphology was revealed by scanning electron microscopy. Energy dispersive X-ray spectrometry confirmed a Zr content of 0.8 mol% in all samples. The band-gap energies were determined from diffuse reflectance UV–vis spectra. The spectral thresholds are shifted toward visible region, except for the unheated catalyst. X-ray photoelectron spectroscopy measurements revealed that the binding energy of Ti 2p3/2 electrons is not influenced by Zr doping. On the contrary, the binding energy of Zr 3d5/2 electrons is lower than that of Zr ions in ZrO2. Photocatalytic degradation of 4-chlorophenol was employed to test photoactivity of the catalyst. The photocatalyst annealed at 900 °C has a 1.5 times higher degradation rate than the standard TiO2 P25 (Degussa).

Keywords
Zr-doped TiO2; Anatase; Rutile; Photocatalysis; Urea; Homogenous co-precipitation; 4-Chlorophenol
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Influence of Zr as TiO2 doping ion on photocatalytic degradation of 4-chlorophenol
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 74, Issues 1–2, 18 June 2007, Pages 83–91
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