C2H5OH sensing characteristics of various Co3O4 nanostructures prepared by solvothermal reaction

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....

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Published inSensors and actuators. B, Chemical Vol. 146; no. 1; pp. 183 - 189
Main Authors Choi, Kwon-Il, Kim, Hae-Ryong, Kim, Kang-Min, Liu, Dawei, Cao, Guozhong, Lee, Jong-Heun
Format Journal Article
LanguageEnglish
Published 08.04.2010
Subjects
Actuators
Agglomeration
Carbon monoxide
Detection
Nanocomposites
Nanomaterials
Nanorods
Nanostructure
Oxalic acid
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Summary: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 100ppmC2H5OH at 300A degree 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 H2, 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.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
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ISSN:0925-4005
DOI:10.1016/j.snb.2010.02.050