VOC Gas Sensor Based on ZnO Synthesized by Sol–Gel Process and Improvement in Gas Sensitivity by Adding TiO2

Lin Ren; Xing Long Qi; Xue Hao; Guang Dong Liang

doi:10.4028/www.scientific.net/AMM.310.67

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 310VOC Gas Sensor Based on ZnO Synthesized by Sol–Gel...

VOC Gas Sensor Based on ZnO Synthesized by Sol–Gel Process and Improvement in Gas Sensitivity by Adding TiO₂

Abstract:

Transparent ZnO gel was synthesized by sol-gel process. In order to getting fine powder of ZnO, at the beginning, ZnO gel was disposed with the pre-firing at 300°C. And then, ZnO powder was calcined at different temperature of 500 °C, 700 °C and 900 °C, the grain size of ZnO powder was different. This paper reports the sensitivity of ZnO gas sensor to three volatile organic compound (VOC) gases (acetone, ethanol and toluene). As we all know, these VOC gases are deleterious to global environment and our health. For different VOC gases, the optimum operating currents and the corresponding sensitivities were different. This paper also researched a nicely sensitive indirect- heating type thick film ZnO gas sensor by adding TiO2. TiO2 was mixed in weight percentage of 2%. The compound oxide sensor debased the optimum working currents of ethanol and toluene. And this sensor also showed rapid response-recovery time, which was propitious to practicability of ZnO gas sensor.

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Periodical:

Applied Mechanics and Materials (Volume 310)

Pages:

67-70

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.310.67

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Online since:

February 2013

Authors:

Lin Ren, Xing Long Qi, Xue Hao, Guang Dong Liang

Keywords:

Sol-Gel, TiO₂, VOC Gas Sensor, ZNO

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References

[1] G.S.V.COLES. Univ. Wales Rev. Sci. Technol, 8, p.13, (1988) .

Google Scholar

[2] S.Yuan Chu, T.Min Yan, S.Li Chen. "Analysis of ZnO varistors prepared by the sol-gel method", Ceram. Int, 26, pp.733-737, (2000).

DOI: 10.1016/s0272-8842(00)00012-2

Google Scholar

[3] S.M. Hyun, K. Hong, B.H. Kim. "Preparation and characterization of Al-doped ZnO transparent conducting thin film by sol-gel processing", J.Korean Ceram. Soc, 33, pp.149-154, (1996).

Google Scholar

[4] C.Cobianu, C.Savaniu, P.Siciliano, S.Capone, M.Utriainen, L.Niinisto. "SnO2 sol-gel derived thin film for integrated gas sensor", Sens. Actuators B, 77, pp.496-502, (2001).

DOI: 10.1016/s0925-4005(01)00755-9

Google Scholar

[5] B.L. Zhu, C.S. Xie, W.Y. Wang, K.J. Huang, J.H.Hu. "Improvement in gas sensitivity of ZnO thick film to volatileorganic compounds (VOCs) by adding TiO2"[C], MaterialsLetters, 58, pp.624-629, (2004).

DOI: 10.1016/s0167-577x(03)00582-2

Google Scholar

[6] H.M. Lin, C.H. Keng, C.Y. Tung. Nanostructured Materials, 9 (1-8), p.747, (1997).

Google Scholar