The effect of polyvinyl alcohol dispersion on LiFePO4thin film gas sensing properties
[1]Patiman Nizamuddin,Abuliz Imiti.The effect of polyvinyl alcohol dispersion on LiFePO4thin film gas sensing properties[J].Journal of Zhengzhou University (Engineering Science),2017,38(01):92-.[doi:10.13705/j.issn.1671-6833.2017.01.007]
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Journal of Zhengzhou University (Engineering Science)[ISSN
1671-6833/CN
41-1339/T] Volume:
38
Number of periods:
2017 01
Page number:
92-
Column:
Public date:
2017-02-24
- Title:
- The effect of polyvinyl alcohol dispersion on LiFePO4thin film gas sensing properties
- CLC:
- -
- Abstract:
- In this paper,in order to optimize the preparation conditions and to improve the sensitivity of LiFePO4 thin film gas sensor,the LiFePO4 was synthesized by hydrothermal method and dispersed in polyvinyl alcohol (PVA).The PVA dispersed LiFePO4 thin film/tin-diffused glass optical waveguide sensing element was fabricated via spin-coating a LiFePO4-PVA dispersion solution onto the surface of tin diffused glass optical waveguide;In the end,the gas sensing properties was monitored using the planar optical waveguide detection system.The testing results indicated that,the best condition for fabrication of sensing film was:the dispersant concentration was of 2wt.％,the ultrasonic vibration time was 2 h,dispersion temperature was 25 ℃,and the corresponding sensing element exhibited good responsible to BTXs (benzene,toluene,xylene).The detection limits for the PVA dispersed LiFePO4 thin film/tin-diffused glass optical waveguide sensor was 1 × 10-8-1 × 10-3.After the dispersion,the sensitivity was increased.
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