NDLI: Effects of Au nanoparticles and ZnO morphology on the photocatalytic performance of Au doped $ZnO/TiO_{2}$ films

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Effects of Au nanoparticles and ZnO morphology on the photocatalytic performance of Au doped $ZnO/TiO_{2}$ films

Content Provider	Scilit
Author	Xie, Haifen Ding, Fan Mu, Haichuan
Copyright Year	2018
Description	Journal: Nanotechnology Au doped ZnO nanocomposites on TiO2 seeding layer (AuZ/T) were fabricated by hydrothermal processing and their photocatalytic performance was investigated. It could be found that the AuZ/T with m-sized, lying ZnO bulks revealed optimal photocatalytic performance toward methyl orange (MO) under simulated sunlight, whose apparent degradation rate constant Kapp of 1.31 was about 20% higher compared to that of ZnO/TiO2 and 3 times higher compared to that of ZnO. The Au nanoparticles, TiO2 seeding layer and hydrothermal processing time imposed vital influence on the morphology of ZnO nanostructures, which played key roles in the formation of ZnO/TiO2 pn heterojunction and charge transfer (CT) inside it, as demonstrated by kinetics of transient photoluminescence (PL) decaying. The incorporation of Au nanoparticles not only induced the variations of ZnO crystallinity and reduction of ZnO band gap (Eg), but also generated the Schottky heterojunction of Au/ZnO and Au/TiO2, which would be beneficial to CT inside nanocomposites and separation of photo-generated electron-hole pairs, as verified by the remarkable PL suppression. The mechanism responsible for photocatalysis enhancement, which was resulted from the hybrid effects of Au nanoparticles and the ZnO morphology was discussed in details.
Related Links	http://iopscience.iop.org/article/10.1088/1361-6528/aaf197/pdf
ISSN	09574484
e-ISSN	13616528
DOI	10.1088/1361-6528/aaf197
Journal	Nanotechnology
Issue Number	8
Volume Number	30
Language	English
Publisher	IOP Publishing
Publisher Date	2018-11-16
Access Restriction	Open
Subject Keyword	Journal: Nanotechnology Photocatalytic Performance
Content Type	Text
Resource Type	Article
Subject	Chemistry Nanoscience and Nanotechnology Mechanics of Materials Mechanical Engineering Bioengineering Electrical and Electronic Engineering

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