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Ga doped ZnO photonic crystals with enhanced photocatalytic activity and its reaction mechanism

Paper ID Volume ID Publish Year Pages File Format Full-Text
44766 46347 2016 10 PDF Available
Title
Ga doped ZnO photonic crystals with enhanced photocatalytic activity and its reaction mechanism
Abstract

•Ga doped ZnO PCs was prepared via a dip-coating infiltration method.•Slow photon effect could be found over the Ga doped ZnO PCs.•The specific surface area of Ga doped ZnO PCs increased after Ga doping.•Ga doped ZnO PCs exhibited enhanced activity toward RhB photodegradation.•The degradation mechanism was discussed.

In this study, Ga doped ZnO photonic crystals were developed for the purpose of achieving the cooperative enhancement from the photonic crystals structure and Ga doping. The Ga doped ZnO photonic crystals with highly ordered skeleton structure could be obtained via a dip-coating infiltration method. By varying the pore diameter of photonic crystals, the slow photon effect could be found over the sample with a pore diameter of 217 nm and the corresponding electronic band gap absorption was enhanced. Moreover, the introduction of Ga increased the specific surface area of Ga doped ZnO photonic crystals while the concentration of hydroxyl oxygen on the surface decreased simultaneously, which formed a competitive relationship in determining the photocatalytic performance of Ga doped ZnO photonic crystals. The photocatalytic activities for the degradation of rhodamine B showed that 3 at% Ga doped ZnO photonic crystals with a pore diameter of 217 nm exhibited higher activity compared with other samples. The higher activity could be attributed to the slow photon effect from the photonic crystal structure and increased specific surface area after Ga doping. Furthermore, based on the results of the detection of radicals, the degradation mechanism was discussed in details.

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Keywords
Ga doped ZnO; Photonic crystal; Slow photon; Specific surface area; Photocatalytic activity
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Ga doped ZnO photonic crystals with enhanced photocatalytic activity and its reaction mechanism
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 195, 15 October 2016, Pages 29–38
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