Synthesis of flower-like ZnO microstructures for gas sensor applications

被引：142
作者：
Rai, Prabhakar
Raj, Sudarsan
Ko, Kyoung-Jun
Park, Kyung-Keun
Yu, Yeon-Tae [1 ]
机构：
[1] Chonbuk Natl Univ, Coll Engn, Div Adv Mat Engn, Jeonju 561756, South Korea
来源：
SENSORS AND ACTUATORS B-CHEMICAL | 2013年 / 178卷
基金：
新加坡国家研究基金会;
关键词：
ZnO; Gas sensor; CO; Ethanol; Acetaldehyde; NO2; NANOSTRUCTURES; NANORODS; NO2;
D O I：
10.1016/j.snb.2012.12.031
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
In the present work, flower-like ZnO microstructures were used for solid state gas sensor applications. Well-dispersed flower-like ZnO microstructures were synthesized by hydrothermal method. The size of flower-like ZnO microstructures was about 5-7 mu m in radius and they were made up of dozen of ZnO nanorods building block units. Gas sensing device was prepared by thick film technology and tested primarily for NO2 gas at different testing temperatures as well as concentrations. Response increased with gas concentration as well as temperature (except 400 degrees C). Further, it showed response for 10 ppm of NO2 gas at room temperature. The response for NO2 was higher than the CO, ethanol and acetaldehyde at low operating temperatures. These flower-like ZnO microstructures showed some sort of selectivity for NO2 below 300 degrees C. (c) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码：107 / 112
页数：6
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