Abstract
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.
| Original language | English |
|---|---|
| Pages (from-to) | 628-633 |
| Number of pages | 6 |
| Journal | Korean Journal of Materials Research |
| Volume | 18 |
| Issue number | 11 |
| DOIs | |
| Publication status | Published - 2008 Nov 1 |
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Keywords
- Gas sensor
- High sensitivity
- Hydrazine reduction
- ZnO
ASJC Scopus subject areas
- Materials Science(all)
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Preparation of ZnO powders by hydrazine method and its sensitivity to C2H5OH. / Kim, Sun Jung; Lee, Jong Heun.
In: Korean Journal of Materials Research, Vol. 18, No. 11, 01.11.2008, p. 628-633.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Preparation of ZnO powders by hydrazine method and its sensitivity to C2H5OH
AU - Kim, Sun Jung
AU - Lee, Jong Heun
PY - 2008/11/1
Y1 - 2008/11/1
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
UR - http://www.scopus.com/inward/record.url?scp=57749091399&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=57749091399&partnerID=8YFLogxK
U2 - 10.3740/MRSK.2008.18.11.628
DO - 10.3740/MRSK.2008.18.11.628
M3 - Article
VL - 18
SP - 628
EP - 633
JO - Korean Journal of Materials Research
JF - Korean Journal of Materials Research
SN - 1225-0562
IS - 11
ER -