Three-dimensional flake-flower Co/Sn oxide composite and its excellent ethanol sensing properties

被引：17

作者：

Wang, Qingji ^{[1
]}

Li, Xu ^{[3
]}

Liu, Fangmeng ^{[2
]}

Sun, Yanfeng ^{[2
]}

Wang, Chen ^{[2
]}

Li, Xiaowei ^{[2
]}

Sun, Peng ^{[2
]}

Lin, Jun ^{[1
]}

Lu, Geyu ^{[2
]}

机构：

[1] Jilin Univ, Coll Instrumentat & Elect Engn, Ximinzhu St, Changchun 130061, Peoples R China

[2] Jilin Univ, Coll Elect Sci & Engn, State Key Lab Integrated Optoelect, Changchun 130012, Peoples R China

[3] Nanyang Technol Univ, Sch Phys & Math Sci, Div Chem & Biol Chem, 21 Nanyang Link, Singapore 637371, Singapore

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2016年 / 230卷

关键词：

3D hierarchical architectures; Co-Sn oxides composites; Gas sensor; Ethanol; HIERARCHICAL SNO2 NANOSTRUCTURES; GAS SENSOR; NANOWIRES; HETEROJUNCTIONS; NANOPARTICLES; PERFORMANCE; FABRICATION; CO3O4-SNO2; NANORODS; NO2;

D O I：

10.1016/j.snb.2016.01.147

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

In this work, we report a dramatic enhancement in ethanol sensing characteristics of Co-Sn oxides composites with 3D hierarchical architectures, which have been successfully synthesized via an environment friendly one-step hydrothermal approach. The response (resistance ratio) of cobalt oxide and tin oxide composites to 100 ppm ethanol (C2H5OH) was 201 at 200 degrees C, representing a significant improvement in comparison to tin oxide 3D hierarchical architectures (7.5, correspondingly). The high response of detection of ethanol can be attributed to the change of charge carrier concentration and the variation of oxygen adsorption due to the formation of abundant heterojunction barriers as well as the tuned catalytic activity of Co components, which induce dissociation of ethanol molecule. The unique nanostructure also played an important role in detecting ethanol gas, due to its contribution in facilitating the transport rate and augmenting the adsorption quantity of the target gas molecules. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：17 / 24

页数：8

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