Issue 37, 2011
From the journal:

Dalton Transactions

Enhanced Raman scattering and photocatalytic activity of Ag/ZnO heterojunction nanocrystals

Chongqi Chen,a   Yuanhui Zheng,*b   Yingying Zhan,a   Xingyi Lin,a   Qi Zheng*a  and  Kemei Weia  

* Corresponding authors

a National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University, Gongye Road 523, Fuzhou, Fujian, China
E-mail: zhengqi@fzu.edu.cn
Fax: +86-591-8373-8808
Tel: +86-591-8373-1234-8112

b Department of Materials Engineering, Monash University, Clayton, VIC, Australia
E-mail: yuanhui.zheng@eng.monash.edu.au

Abstract

In this work, we study the enhancement of Raman signals and photocatalytic activity of Ag/ZnO heterojunctions with an Ag content of 1 at.%, which were synthesized by photochemical deposition of Ag nanoparticles onto pre-synthesized ZnO nanorods. A strong interaction between Ag and ZnO nanocrystals were evidenced by XPS and UV-vis spectroscopy. The binding energy of Ag nanoparticles shifts toward lower energy compared to that of pure Ag nanoparticles, revealing that electrons transfer from Ag to the ZnO nanocrystals. The red shift of the plasmon absorption peak of Ag nanoparticles in Ag/ZnO heterojunctions further confirms the strong interaction between the two components. This strong interaction, arising from the coupling between Ag and ZnO nanocrystals, is responsible for the enhancement of Raman signals and photocatalytic activity of the Ag/ZnO heterojunctions.

Graphical abstract: Enhanced Raman scattering and photocatalytic activity of Ag/ZnO heterojunction nanocrystals

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Article information

DOI
https://doi.org/10.1039/C1DT10799B
Article type
Paper
Submitted
29 Apr 2011
Accepted
27 Jun 2011
First published
16 Aug 2011

Dalton Trans., 2011,40, 9566-9570

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Enhanced Raman scattering and photocatalytic activity of Ag/ZnO heterojunction nanocrystals

C. Chen, Y. Zheng, Y. Zhan, X. Lin, Q. Zheng and K. Wei, Dalton Trans., 2011, 40, 9566 DOI: 10.1039/C1DT10799B

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