Ultra-low NO2 detection by gamma WO3 synthesized by Reactive Spray Deposition Technology

被引：31

作者：

Jain, Rishabh ^{[1
,3
,4
]}

Lei, Yu ^{[2
]}

Maric, Radenka ^{[1
,2
,3
]}

机构：

[1] Univ Connecticut, Dept Mat Sci & Engn, 97 North Eagleville Rd,Unit 3136, Storrs, CT 06269 USA

[2] Univ Connecticut, Dept Chem & Biomol Engn, 191 Auditorium Rd,Unit 3222, Storrs, CT 06269 USA

[3] Univ Connecticut, Ctr Clean Energy Engn, 44 Weaver Rd,Unit 5233, Storrs, CT 06269 USA

[4] Univ Connecticut, Inst Mat Sci, 97 North Eagleville Rd,Unit 3136, Storrs, CT 06269 USA

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2016年 / 236卷

基金：

美国国家科学基金会;

关键词：

Gas sensor; Combustion; NO2; sensing; Flame spray pyrolysis; Tungsten oxide nanoparticles; Reactive Spray Deposition Technology; GAS-SENSING PROPERTIES; NO2-SENSING PROPERTIES; NITROGEN-DIOXIDE; DRIFT COUNTERACTION; CRYSTAL-STRUCTURE; OXYGEN EVOLUTION; CARBON-MONOXIDE; THIN-FILMS; SENSOR; CATALYST;

D O I：

10.1016/j.snb.2016.05.134

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A porous tungsten oxide (WO3) NO2 sensor was developed by a one-step flame based process called Reactive Spray Deposition Technology (RSDT). This nano-crystalline WO3 film was deposited directly on gold interdigitated electrodes. The sensing characteristics of this NO2 sensor was measured at the parts per million (ppm) level, (0.17-5 ppm in air) at 300 degrees C. The sensors showed a relatively fast response time (similar to 7s) and recovery time (similar to 5 min), respectively. The stability of the sensor was evaluated for 300 h in 0.5 ppm NO2 at 300 degrees C in (2000 response-recovery cycles). The sensor was stable up to 6 days (similar to 150 h) of continuous operation and degraded between 150-300 h. The morphology and surface properties of the WO3 film were investigated with XRD, Raman spectroscopy, BET, SEM, TEM, and HRTEM. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：163 / 172

页数：10

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