Electrochemical and Optical Properties of ZnO Nanowires Modified with Ag Nanoparticles by Electrodeposition

Electrochemical and Optical Properties of ZnO Nanowires Modified with Ag Nanoparticles by Electrodeposition
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电沉积银纳米粒子修饰 ZnO 纳米线的电化学和光学性能

DOI:
10.1149/2.046206jes
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发表时间:
2012
影响因子:
3.9
通讯作者:
Tong, Yexiang
Tong, Yexiang
中科院分区:
工程技术4区
文献类型:
--
作者:
Zhong, Kuan;Mao, Yanchao;Sun, Xiaofeng;Liang, Chaolun;Liu, Peng;Tong, Yexiang

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研究了电沉积法制备的Ag纳米粒子修饰ZnO纳米线的电化学和光学性质。循环伏安法和计时电流法的结果表明,辐射,结晶良好的ZnO纳米线电极,具有空间结构,允许快速的Ag(I)离子扩散,快速的电子转移,和高的银沉积速率。沉积在纳米线上的大量Ag纳米颗粒引起ZnO光学带隙的0.23 eV的红移,而不会引起光吸收强度的大幅度降低。然而,在光致发光强度发生了很大的下降,主要是由于ZnO和Ag之间的电荷转移。该复合结构在光电子学和光电子学领域具有广阔的应用前景。
The electrochemical and optical properties of ZnO nanowires modified with Ag nanoparticles by electrodeposition are studied. The results of cyclic voltammetry and chronoamperometry show that the radiated, well-crystallized ZnO-nanowire electrode, with a spacial architecture, allows fast Ag(I) ion diffusion, rapid electron transfer, and high Ag deposition rate. Numerous Ag nanoparticles deposited on the nanowires induce a redshift of 0.23 eV in the ZnO optical bandgap while without causing a large decrease in optical absorption intensity. However, a great decrease in photoluminescence intensity occurs in the modified structure, mainly resulting from the charge transfer between ZnO and Ag. The composite structure has promising applications in photocatalysis and photovoltaics.
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发表时间: 2004-08-27
期刊: SCIENCE
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