C2H5OH sensing characteristics of various Co3O4 nanostructures prepared by solvothermal reaction

被引：176

作者：

Choi, Kwon-Il ^{[1
]}

Kim, Hae-Ryong ^{[1
]}

Kim, Kang-Min ^{[1
]}

Li, Dawei ^{[2
]}

Cao, Guozhong ^{[2
]}

Lee, Jong-Heun ^{[1
]}

机构：

[1] Korea Univ, Dept Mat Sci & Engn, Seoul 136713, South Korea

[2] Univ Washington, Dept Mat Sci & Engn, Seattle, WA 98195 USA

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2010年 / 146卷 / 01期

关键词：

Co3O4; Gas sensors; Nanostructures; C2H5OH sensor; Response/recovery time; COBALT OXIDE; INDIUM OXIDE; GAS SENSORS; SNO2-CO3O4; COMPOSITES; ZNO NANORODS; CO; SENSITIVITY; PERFORMANCE; FABRICATION; MORPHOLOGY;

D O I：

10.1016/j.snb.2010.02.050

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Various morphologies of Co-containing precursors such as nanorods, nanosheets, and nanocubes were prepared by controlling the solvothermal reaction using cobalt acetate. L(+)-lysine, and oxalic acid, all of which were successfully converted into Co3O4 nanostructures without morphological variation. The gas responses of these Co3O4 nanosheets, nanorods, and nanocubes to 100 ppm C2H5OH at 300 degrees C were 10.5, 4.7, and 4.5 times higher than those of the Co3O4 agglomerated nanopowders, respectively. In addition, the selectivity to C2H5OH over CO and H-2, as well as the response/recovery kinetics, were significantly improved. These enhanced gas-sensing characteristics were attributed to the less agglomerated nanostructures of the sensing materials. (c) 2010 Elsevier B.V. All rights reserved.

引用

页码：183 / 189

页数：7

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