NO2 Gas Sensor Based on NiO Nanofilms

doi:10.12068/j.issn.1005-3026.2018.12.019

Journal of Northeastern University Natural Science ›› 2018, Vol. 39 ›› Issue (12): 1769-1773.DOI: 10.12068/j.issn.1005-3026.2018.12.019

• Resources & Civil Engineering • Previous Articles Next Articles

NO₂ Gas Sensor Based on NiO Nanofilms

ZHAO Si-kai， ZHONG Xiang-xi， ZHOU Peng-fei， SHEN Yan-bai

School of Resources & Civil Engineering， Northeastern University， Shenyang 110819， China.

Received:2017-09-15 Revised:2017-09-15 Online:2018-12-15 Published:2018-12-19
Contact: SHEN Yan-bai
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Abstract

Abstract: NiO nanofilms were synthesized by sol-gel dip-coating method using the mixture of NiC₄H₆O₄·4H₂O， NH₃·H₂O and C₃H₈O as the precursor. The effects of pulling speed and coating layer on the morphology， structure and NO₂ sensing properties of NiO nanofilms were investigated. Uniform and porous NiO nanofilms were obtained under the preparation conditions of pulling speed of 400μm/s and coating layer of 2. The films were composed of cubic nanocrystalline NiO particles with the diameter of 20~30nm. NO₂ sensing measurements demonstrated that NiO nanofilms with p-type semiconductor characteristic show good response-recovery properties as well as excellent reversibility. NO₂ sensing mechanism of NiO nanofilms was investigated and discussed.

Key words: NiO nanofilm, sol-gel method, NO₂, gas sensing properties, gas sensing mechanism

CLC Number:

TP212

ZHAO Si-kai， ZHONG Xiang-xi， ZHOU Peng-fei， SHEN Yan-bai. NO₂ Gas Sensor Based on NiO Nanofilms[J]. Journal of Northeastern University Natural Science, 2018, 39(12): 1769-1773.

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NO₂ Gas Sensor Based on NiO Nanofilms

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