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Photocatalytic degradation of 2,4,6-trichlorophenol using lanthanum doped ZnO in aqueous suspension

Paper ID Volume ID Publish Year Pages File Format Full-Text
52431 46874 2007 6 PDF Available
Title
Photocatalytic degradation of 2,4,6-trichlorophenol using lanthanum doped ZnO in aqueous suspension
Abstract

La-doped ZnO nano particles with different La contents were prepared by co-precipitation method using the precursors of zinc and lanthanum. The XRD results indicated that the particle size of La-doped ZnO is much smaller as compared to that of pure ZnO and decreases with increasing La loading. The effect of La loading on the photocatalytic activity of La-doped ZnO in the degradation of 2,4,6-trichlorophenol (TCP) was studied and the results are compared with the pure ZnO and TiO2. The results showed that the rate of degradation of TCP over La-doped ZnO is much higher as compared to that of pure ZnO and TiO2 and increases with increasing La loading upto 0.8 wt% and then decreases. Moreover, the relative photonic efficiency value of La-doped ZnO is relatively higher as compared to undoped ZnO. Among the catalyst studied, 0.8 wt% La-doped ZnO was the most active, showing high relative photonic efficiencies and high photocatalytic activity for the degradation of TCP. La doping in ZnO is highly effective and can significantly enhance the photocatalytic degradation and mineralization of TCP. The enhancement of photocatalytic activity of La-doped ZnO samples is mainly due to their smaller particle size and capability for reducing the electron hole pair recombination. Moreover, the increase of the TCP adsorption over La-doped ZnO samples may also be related for their high photocatalytic activity.

Keywords
2,4,6-Trichlorophenol; La-doped ZnO; Photocatalytic degradation; Relative photonic efficiency
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Photocatalytic degradation of 2,4,6-trichlorophenol using lanthanum doped ZnO in aqueous suspension
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 8, Issue 9, September 2007, Pages 1377–1382
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