In2O3-ZnO nanocomposites: High sensor response and selectivity to ethanol

被引：58

作者：

Gholami, Mahsa ^{[1
]}

Khodadadi, Abbas Ali ^{[1
]}

Firooz, Azam Anaraki ^{[2
]}

Mortazavi, Yadollah ^{[3
]}

机构：

[1] Univ Tehran, Sch Chem Engn, Oil & Gas Proc Ctr Excellence, Tehran 111554563, Iran

[2] Shahid Rajaee Teacher Training Univ, Fac Sci, Dept Chem, Tehran, Iran

[3] Univ Tehran, Nanoelect Ctr Excellence, Coll Engn, Tehran, Iran

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2015年 / 212卷

关键词：

In2O3; ZnO; Nanostructure; Gas sensor; Ethanol; Selectivity; SENSING CHARACTERISTICS; ZNO; CO; NANOPARTICLES; NANOFIBERS; NANOWIRES; COMPOSITE; FILMS; OXIDE;

D O I：

10.1016/j.snb.2015.02.030

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

ZnO and its nanocomposites with In2O3 have been synthesized by a simple microwave-assisted co-precipitation method. The samples were characterized by scanning electron microscopy (SEM), high resolution transmission electron microscopy (HRTEM), powder X-ray diffraction (XRD), BET surface area measurement, and photoluminescence (PL) spectroscopy and used as sensors for detection of ethanol with remarkable response and selectivity and negligible response to CO and methane. The results show that proportions of In3+ and Zn2+ have significant effect on morphology, crystallite size, surface area, photoluminescence and sensing properties. As the In2O3 content of the samples increases, the BET surface area increases up to 4.7 times. The gas sensing mechanism of these sensors is discussed in details. The sensor with 0.02:1.0 and 0.08:1.0 molar ratios of In3+:Zn2+ are highly sensitive and selective for the detection of ethanol. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：395 / 403

页数：9

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