Fabrication, characterization and photocatalytic properties of Ag nanoparticles modified TiO2 NTs

被引：73

作者：

Wang, Qingyao ^{[1
]}

Yang, Xiuchun ^{[1
]}

Liu, Dan ^{[1
]}

Zhao, Jianfu ^{[1
]}

机构：

[1] Tongji Univ, Sch Mat Sci & Engn, Shanghai 201804, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2012年 / 527卷

基金：

中国国家自然科学基金;

关键词：

TiO2; NTs; Ag nanoparticles; Successive ionic layer adsorption and reaction; Photocatalytic degradation; NANOTUBE ARRAYS; AU; DEGRADATION;

D O I：

10.1016/j.jallcom.2012.02.180

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Ordered anatase TiO2 nanotubes (TiO2 NTs) on Ti substrate were synthesized by electrochemical anodization and subsequently vapor-thermal treatment. Ag nanoparticles were decorated on TiO2 NTs by successive ionic layer adsorption and reaction (SILAR) technique. Raman spectroscopy, X-ray absorption near edge spectroscopy (XANES), X-ray diffraction (XRD), UV-vis diffuse reflectance spectroscopy, scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were used for the characterization of surface morphology, phase composition, and microstructure of the original TiO2 NTs, the vapor-thermally treated TiO2 NTs and the Ag nanoparticles decorated TiO2 NTs. The results indicate that vapor-thermal treatment favors to the transformation of amorphous TiO2 into anatase phase. Increasing the SILAR cycle times favors to increase the loaded amounts of Ag nanoparticles in TiO2 NTs. Ag nanoparticles are uniformly distributed in the TiO2 NTs, and the SILAR process does not damage the ordered tubular structure. A possible formation mechanism of Ag/TiO2 NTs has also been proposed. The photocatalytic results showed that the Ag nanoparticle modified TiO2 NTs largely enhanced the photocatalytic degradation of methyl orange under ultraviolet light irradiation. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：106 / 111

页数：6

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