Evaluation of Pt/In2O3-WO3 nano powder ultra-trace level NO gas sensor

被引：39

作者：

Chang, Bei-Yu ^{[1
]}

Wang, Chen-Yang ^{[1
]}

Lai, Hsiao-Fang ^{[1
]}

Wu, Ren-Jang ^{[1
]}

Chavali, Murthy ^{[2
]}

机构：

[1] Providence Univ, Dept Appl Chem, Taichung 43301, Taiwan

[2] Malkolak Inst Nanosci & Technol M INT, MKC, Hyderabad 500038, Andhra Pradesh, India

来源：

JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS | 2014年 / 45卷 / 03期

关键词：

Pt/In2O3-WO3; Temperature program reduction (TPR); Transmission electron microscope (TEM); NO gas sensing; NITRIC-OXIDE; THIN-FILMS;

D O I：

10.1016/j.jtice.2013.09.002

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Various nano metal oxide composites were prepared from In2O3WO3 (4:1) and 0.25% Pt/In2O3-WO3 (4:1) were coated as sensing materials over screen printed gold electrodes as a room temperature nitric oxide sensor. The optimized composite materials were characterized by temperature program reduction (TPR), X-ray diffraction (XRD), transmission electron microscope (TEM) techniques. From the obtained experimental results, we found that In203 W03 (4:1) was better than other ratios. The sensor response (S = R-NO/RN2) toward detection of 1000 ppm NO at room temperature was 23.9. Response time (T-90) and recovery time (T-90) are 12.5 and 15.3 mm, respectively. Further loading with 0.25% Pt, sensor response was increased. The sensor responses for 0.1 ppm and 25 ppb were 330 and 15.2, respectively. Sensor response was good for NO concentration range of 25-100 ppb. (C) 2013 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.

引用

页码：1056 / 1064

页数：9

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