A highly sensitive ethanol sensor based on Ag@TiO2 nanoparticles at room temperature

被引：88
作者：
Zhu, Zhen [2 ]
Kao, Cheng-Tse [1 ]
Wu, Ren-Jang [1 ]
机构：
[1] Providence Univ, Dept Appl Chem, Taichung 43301, Taiwan
[2] Tianjin Univ Technol, Sch Environm Sci & Safety Engn, Tianjin 300384, Peoples R China
来源：
APPLIED SURFACE SCIENCE | 2014年 / 320卷
关键词：
Ag@TiO2; Core-shell; Ethanol gas; Excellent selectivity; Gas sensor; FACILE SYNTHESIS; GAS SENSOR; ZNO; NANOWIRES;
D O I：
10.1016/j.apsusc.2014.09.108
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：
In this study, the ethanol-sensing characteristics of Ag@TiO2 nanoparticles were investigated. The morphology, structure, and formation mechanism of the Ag@TiO2 core-shell nanoparticles were carefully studied using X-ray diffraction, transmission electron microscopy, ultraviolet-visible spectroscopy, Zeta-Sizer Nano ZS and energy-dispersive X-ray spectroscopy. A gas sensing study showed that Ag@TiO2 is a promising sensor for detecting ethanol gas at low concentrations (below 5 ppm) at room working temperature. Ag@TiO2 exhibited a sensor response of 1.04-4.35 at the ethanol concentration from 0.15 ppm to 5 ppm. In addition, the sensor presented an excellent selectivity and stability for ethanol gas. This systematic study of the promising ethanol-sensing characteristics of Ag@TiO2 nanoparticles can facilitate the development of sensors that detect ethanol gas. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：348 / 355
页数：8
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