Selective Detection of NO(2) Using Cr-Doped CuO Nanorods

CuO nanosheets, Cr-doped CuO nanosheets, and Cr-doped CuO nanorods were prepared by heating a slurry containing Cu-hydroxide/Cr-hydroxide. Their responses to 100 ppm NO(2), C(2)H(5)OH, NH(3), trimethylamine, C(3)H(8), and CO were measured. For 2.2 at% Cr-doped CuO nanorods, the response (R(a)/R(g),...

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Detalles Bibliográficos
Autores principales: Kim, Kang-Min, Jeong, Hyun-Mook, Kim, Hae-Ryong, Choi, Kwon-Il, Kim, Hyo-Joong, Lee, Jong-Heun
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Molecular Diversity Preservation International (MDPI) 2012
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3436013/
https://www.ncbi.nlm.nih.gov/pubmed/22969384
http://dx.doi.org/10.3390/s120608013
Descripción
Sumario:CuO nanosheets, Cr-doped CuO nanosheets, and Cr-doped CuO nanorods were prepared by heating a slurry containing Cu-hydroxide/Cr-hydroxide. Their responses to 100 ppm NO(2), C(2)H(5)OH, NH(3), trimethylamine, C(3)H(8), and CO were measured. For 2.2 at% Cr-doped CuO nanorods, the response (R(a)/R(g), R(a): resistance in air, R(g): resistance in gas) to 100 ppm NO(2) was 134.2 at 250 °C, which was significantly higher than that of pure CuO nano-sheets (R(a)/R(g) = 7.5) and 0.76 at% Cr-doped CuO nanosheets (R(a)/R(g) = 19.9). In addition, the sensitivity for NO(2) was also markedly enhanced by Cr doping. Highly sensitive and selective detection of NO(2) in 2.2 at% Cr-doped CuO nanorods is explained in relation to Cr-doping induced changes in donor density, morphology, and catalytic effects.

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