TY - JOUR
T1 - Preparation of ZnO powders by hydrazine method and its sensitivity to C2H5OH
AU - Kim, Sun Jung
AU - Lee, Jong Heun
N1 - Copyright:
Copyright 2009 Elsevier B.V., All rights reserved.
PY - 2008/11
Y1 - 2008/11
N2 - ZnO nanopowders were synthesized by the sol-gel method using hydrazine reduction, and their gas responses to 6 gases (200 ppm of C2H5OH, CH3COCH3, H2, C3H8, 100 ppm of CO, and 5 ppm of NO2) were measured at 300 - 400°C. The prepared ZnO nanopowders showed high gas responses to C2H5OH and CH3COCH3 at 400°C. The sensing materials prepared at the compositions of [ZnCl2]: [N2H4]:[NaOH] = 1:1:1 and 1:2:2 showed particularly high gas responses (S = Ra/Rg, Ra: resistance in air, Rg: resistance in gas) to 200 ppm of C2H5OH(S = 102.8-160.7) and 200 ppm of CH3COCH3 (S = 72.6-166.2), while they showed low gas responses to H2, C3H8, CO, and NO2. The reason for high sensitivity to these 2 gases was discussed in relation to the reaction mechanism, oxidation state, surface area, and particle morphology of the sensing materials.
AB - ZnO nanopowders were synthesized by the sol-gel method using hydrazine reduction, and their gas responses to 6 gases (200 ppm of C2H5OH, CH3COCH3, H2, C3H8, 100 ppm of CO, and 5 ppm of NO2) were measured at 300 - 400°C. The prepared ZnO nanopowders showed high gas responses to C2H5OH and CH3COCH3 at 400°C. The sensing materials prepared at the compositions of [ZnCl2]: [N2H4]:[NaOH] = 1:1:1 and 1:2:2 showed particularly high gas responses (S = Ra/Rg, Ra: resistance in air, Rg: resistance in gas) to 200 ppm of C2H5OH(S = 102.8-160.7) and 200 ppm of CH3COCH3 (S = 72.6-166.2), while they showed low gas responses to H2, C3H8, CO, and NO2. The reason for high sensitivity to these 2 gases was discussed in relation to the reaction mechanism, oxidation state, surface area, and particle morphology of the sensing materials.
KW - Gas sensor
KW - High sensitivity
KW - Hydrazine reduction
KW - ZnO
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U2 - 10.3740/MRSK.2008.18.11.628
DO - 10.3740/MRSK.2008.18.11.628
M3 - Article
AN - SCOPUS:57749091399
VL - 18
SP - 628
EP - 633
JO - Korean Journal of Materials Research
JF - Korean Journal of Materials Research
SN - 1225-0562
IS - 11
ER -