하이드라진 방법에 의한 ZnO 미분말의 합성 및 에탄올 감응성

김선중; 이종흔; Sun-Jung Kim; Jong-Heun Lee

Korean Journal of Materials Research, Vol.18, No.11, 628-634, November, 2008

DOI10.3740/MRSK.2008.18.11.628 Export Citation

하이드라진 방법에 의한 ZnO 미분말의 합성 및 에탄올 감응성

Preparation of ZnO Powders by Hydrazine Method and Its Sensitivity to C2H5OH

김선중, 이종흔 ^†

고려대학교 신소재공학과

Sun-Jung Kim, and Jong-Heun Lee^†

Department of Materials Science and Engineering, Korea University, Seoul, Korea

E-mail:

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 oC. The prepared ZnO nanopowders showed high gas responses to C2H5OH and CH3COCH3 at 400 oC. 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.

Keywords:ZnO;gas sensor;hydrazine reduction;high sensitivity

[References]

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Xiangfeng C, Dongli J, Djurisic AB, Leung YH, Chem. Phys. Lett., 401, 426 (2005)
Muramatsu A, Sugimoto T, J. Colloid Interface Sci., 189(1), 167 (1997)
Sugimoto T, Zhou XP, Muramatsu A, J. Colloid Interface Sci., 259(1), 43 (2003)
Choi JY, Lee YK, Yoon SM, Lee HC, Kim BK, Kim JM, Kim KM, Lee JH, J. Am. Ceram. Soc., 88(11), 3020 (2005)
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Li YD, Li LQ, Liao HW, Wang HR, J. Mater. Chem., 9, 2675 (1999)
Guo L, Liu CM, Wang RM, Xu HB, Wu ZY, Yang S, J. Am. Chem. Soc., 126(14), 4530 (2004)
Kim KM, Lee JH, Yoon SM, Lee HC, Lee YK, Choi JY, J. Electroceram., 17, 339 (2006)
Jinkawa T, Sakai G, Tamaki J, Miura N, Yamazoe N, J. Mol. Catal. A-Chem., 155(1-2), 193 (2000)
Tsang SC, Bulpitt C, Sens. Actuators B, 52, 226 (1998)
Rao BB, Mater. Chem. Phys., 64(1), 62 (2000)
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Kennedy ML, Kruis FE, Fissan H, Mehta BR, Stappert S, Dumpich G, J. Appl. Phys., 93(1), 551 (2003)
Leite ER, Weber IT, Longo E, Varela JA, Adv. Mater., 12(13), 965 (2000)
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[7] Rout CS, Krishna SH, Vivekchand SRC, Govindaraj A, Rao CNR, Chem. Phys. Lett., 418(4-6), 586 (2006)

[8] Xiangfeng C, Dongli J, Djurisic AB, Leung YH, Chem. Phys. Lett., 401, 426 (2005)

[9] Muramatsu A, Sugimoto T, J. Colloid Interface Sci., 189(1), 167 (1997)

[10] Sugimoto T, Zhou XP, Muramatsu A, J. Colloid Interface Sci., 259(1), 43 (2003)

[11] Choi JY, Lee YK, Yoon SM, Lee HC, Kim BK, Kim JM, Kim KM, Lee JH, J. Am. Ceram. Soc., 88(11), 3020 (2005)

[12] Schmidt EW, Hydrazine and Its Derivatives: Preparation, Properties, Applications, 2nd ed., Vol. 1, p. 307-519, Wiley-Interscience, N.Y., USA (2001). (2001)

[13] Bottomley F, Q. Rev. Chem. Soc., 24, 617 (1970)

[14] Li YD, Li CW, Wang HR, Li LQ, Qian YT, Mater. Chem. Phys., 59, 88 (1999)

[15] Li YD, Li LQ, Liao HW, Wang HR, J. Mater. Chem., 9, 2675 (1999)

[16] Guo L, Liu CM, Wang RM, Xu HB, Wu ZY, Yang S, J. Am. Chem. Soc., 126(14), 4530 (2004)

[17] Kim KM, Lee JH, Yoon SM, Lee HC, Lee YK, Choi JY, J. Electroceram., 17, 339 (2006)

[18] Jinkawa T, Sakai G, Tamaki J, Miura N, Yamazoe N, J. Mol. Catal. A-Chem., 155(1-2), 193 (2000)

[19] Tsang SC, Bulpitt C, Sens. Actuators B, 52, 226 (1998)

[20] Rao BB, Mater. Chem. Phys., 64(1), 62 (2000)

[21] Tsuboi T, Ishii K, Tamura S, in Proceedings of the 17th International Colloquium on the Dynamics of Explosions and Reactive Systems, (Heidelberg, Germany, July 25-30, 1999). (1999)

[22] Kennedy ML, Kruis FE, Fissan H, Mehta BR, Stappert S, Dumpich G, J. Appl. Phys., 93(1), 551 (2003)

[23] Leite ER, Weber IT, Longo E, Varela JA, Adv. Mater., 12(13), 965 (2000)

[24] Zhang G, Liu M, Sens. Actuators B, 69, 144 (2000)