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A Facile Synthesis Of Fully Porous Tazo Composite And Its Remarkable Gas Sensitive Performance

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  • DONGDONG LIANG

    (Engineering Research Center of Optoelectronic Materials and Devices, School of Materials Science and Engineering, Dalian Jiaotong University, Dalian 116028, P. R. China)

  • SHIMIN LIU

    (Engineering Research Center of Optoelectronic Materials and Devices, School of Materials Science and Engineering, Dalian Jiaotong University, Dalian 116028, P. R. China)

  • ZHINUO WANG

    (Engineering Research Center of Optoelectronic Materials and Devices, School of Materials Science and Engineering, Dalian Jiaotong University, Dalian 116028, P. R. China)

  • YU GUO

    (Engineering Research Center of Optoelectronic Materials and Devices, School of Materials Science and Engineering, Dalian Jiaotong University, Dalian 116028, P. R. China)

  • WEIWEI JIANG

    (Engineering Research Center of Optoelectronic Materials and Devices, School of Materials Science and Engineering, Dalian Jiaotong University, Dalian 116028, P. R. China)

  • CHAOQIAN LIU

    (Engineering Research Center of Optoelectronic Materials and Devices, School of Materials Science and Engineering, Dalian Jiaotong University, Dalian 116028, P. R. China)

  • WANYU DING

    (Engineering Research Center of Optoelectronic Materials and Devices, School of Materials Science and Engineering, Dalian Jiaotong University, Dalian 116028, P. R. China)

  • HUALIN WANG

    (Engineering Research Center of Optoelectronic Materials and Devices, School of Materials Science and Engineering, Dalian Jiaotong University, Dalian 116028, P. R. China)

  • NAN WANG

    (Engineering Research Center of Optoelectronic Materials and Devices, School of Materials Science and Engineering, Dalian Jiaotong University, Dalian 116028, P. R. China)

  • ZHIHUA ZHANG

    (Engineering Research Center of Optoelectronic Materials and Devices, School of Materials Science and Engineering, Dalian Jiaotong University, Dalian 116028, P. R. China)

Abstract

The composite of a nanocrystalline SnO2 thick film deposited on an Al-doped ZnO ceramic substrate was firstly proposed. This study also provided a simple, fast and cost effective method to prepare SnO2 thick film and Al-doped ZnO ceramic as well as the final composite. The crystal structure, morphology, composition, pore size distribution and gas sensitivity of the composite were investigated by means of X-ray diffraction, scanning electron microscopy, transmission electron microscopy, energy dispersive spectroscopy, Barrett–Joyner–Halenda analysis and gas sensitive measurement system. Results indicated that the composite was fully porous consisted of SnO2, ZnO and ZnAl2O4 crystal phases. The macrosized pores generated in the composite could enhance the gas infiltration into the sensing layers effectively. In this way, combining a high gas-transporting-capability and a nanocrystalline SnO2 thick film, the composite showed very impressive performance. The gas sensitivity of the composite was high enough for ethanol vapor with different concentrations, which was comparable to other kinds of reported SnO2 gas sensors, while showing two straight lines with a turning point at 1000ppm. Finally, the gas sensitive mechanism was proposed based on the microstructure and composition of the composite.

Suggested Citation

  • Dongdong Liang & Shimin Liu & Zhinuo Wang & Yu Guo & Weiwei Jiang & Chaoqian Liu & Wanyu Ding & Hualin Wang & Nan Wang & Zhihua Zhang, 2018. "A Facile Synthesis Of Fully Porous Tazo Composite And Its Remarkable Gas Sensitive Performance," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 25(04), pages 1-6, June.
    • Handle: RePEc:wsi:srlxxx:v:25:y:2018:i:04:n:s0218625x18500877
    DOI: 10.1142/S0218625X18500877
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    Keywords

    SnO2; AZO; composite; gas sensitivity; porosity;
    All these keywords.

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