Selective Detection of NO2 Using Cr-Doped CuO Nanorods

Kang Min Kim, Hyun Mook Jeong, Hae Ryong Kim, Kwon Il Choi, Hyo Joong Kim, Jong Heun Lee

Research output: Contribution to journalArticle

41 Citations (Scopus)

Abstract

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 NO2, C2H5OH, NH3, trimethylamine, C3H8, and CO were measured. For 2.2 at% Cr-doped CuO nanorods, the response (Ra/Rg, Ra: resistance in air, Rg: resistance in gas) to 100 ppm NO2 was 134.2 at 250 °C, which was significantly higher than that of pure CuO nano-sheets (Ra/Rg = 7.5) and 0.76 at% Cr-doped CuO nanosheets (Ra/Rg = 19.9). In addition, the sensitivity for NO2 was also markedly enhanced by Cr doping. Highly sensitive and selective detection of NO2 in 2.2 at% Cr-doped CuO nanorods is explained in relation to Cr-doping induced changes in donor density, morphology, and catalytic effects.

Original languageEnglish
Pages (from-to)8013-8025
Number of pages13
JournalSensors (Switzerland)
Volume12
Issue number6
DOIs
Publication statusPublished - 2012 Jun 1

Fingerprint

Nanotubes
Nanosheets
Nanorods
nanorods
Gases
Air
Doping (additives)
Sheet resistance
Carbon Monoxide
Heating
hydroxides
air
gases
heating
hydroxide ion
sensitivity

Keywords

  • CrO
  • CuO
  • Gas sensor
  • Nanorods
  • Nanosheets
  • Nanostructures
  • P-type

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Atomic and Molecular Physics, and Optics
  • Analytical Chemistry
  • Biochemistry

Cite this

Kim, K. M., Jeong, H. M., Kim, H. R., Choi, K. I., Kim, H. J., & Lee, J. H. (2012). Selective Detection of NO2 Using Cr-Doped CuO Nanorods. Sensors (Switzerland), 12(6), 8013-8025. https://doi.org/10.3390/s120608013

Selective Detection of NO2 Using Cr-Doped CuO Nanorods. / Kim, Kang Min; Jeong, Hyun Mook; Kim, Hae Ryong; Choi, Kwon Il; Kim, Hyo Joong; Lee, Jong Heun.

In: Sensors (Switzerland), Vol. 12, No. 6, 01.06.2012, p. 8013-8025.

Research output: Contribution to journalArticle

Kim, KM, Jeong, HM, Kim, HR, Choi, KI, Kim, HJ & Lee, JH 2012, 'Selective Detection of NO2 Using Cr-Doped CuO Nanorods', Sensors (Switzerland), vol. 12, no. 6, pp. 8013-8025. https://doi.org/10.3390/s120608013
Kim, Kang Min ; Jeong, Hyun Mook ; Kim, Hae Ryong ; Choi, Kwon Il ; Kim, Hyo Joong ; Lee, Jong Heun. / Selective Detection of NO2 Using Cr-Doped CuO Nanorods. In: Sensors (Switzerland). 2012 ; Vol. 12, No. 6. pp. 8013-8025.
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