Controlled synthesis of Ag/TiO2 core-shell nanowires with smooth and bristled surfaces via a one-step solution route

被引：202

作者：

Du, JM ^{[1
]}

Zhang, JL ^{[1
]}

Liu, ZM ^{[1
]}

Han, BX ^{[1
]}

Jiang, T ^{[1
]}

Huang, Y ^{[1
]}

机构：

[1] Chinese Acad Sci, Ctr Mol Sci, Key Lab Colloid Interfacial & Chem Thermodynam, CAS,Inst Chem, Beijing 100080, Peoples R China

来源：

LANGMUIR | 2006年 / 22卷 / 03期

关键词：

D O I：

10.1021/la052337q

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Ag/TiO2 core-shell nanowires were synthesized via a one-step solution method without using a template. Interestingly, the shell morphologies can be controlled to be smooth or bristled by altering the reaction temperature. Moreover, the TiO2 shell thickness and bristle length can be tuned by changing the AgNO3 concentration. Scanning electron microscopy (SEM), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), selected-area electron diffraction (SAED), energy-dispersive X-ray analysis (EDS), X-ray powder diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) were used to characterize the resultant Ag/TiO2 core-shell nanowires. Moreover, the absorption peaks of our samples are significantly red-shifted compared with those of the uncoated pure silver nanowires, indicating that interaction between the core and shell occurred. On the basis of the experimental results, we proposed a template-induced Oswald ripening mechanism to explain the formation of the Ag/TiO2 core-shell nanowires.

引用

页码：1307 / 1312

页数：6

共 24 条

[1] Photocatalytic synthesis of silver nanoparticles stabilized by TiO2 nanorods:: A semiconductor/metal nanocomposite in homogeneous nonpolar solution [J].