LIU Wen-long, LI Jun-xia, YI Pan-ting, et al. Process optimization for preparing acetone gas sensor based on PANI / Au / Al2O3 electrode[J]. 2016, 35(9): 66-68.
LIU Wen-long, LI Jun-xia, YI Pan-ting, et al. Process optimization for preparing acetone gas sensor based on PANI / Au / Al2O3 electrode[J]. 2016, 35(9): 66-68. DOI: 10.13873/J.1000-9787(2016)09-0066-03.
In order to obtain a better performance of resistive acetone gas sensor
based on micro process technology and electrochemical methods
PANI / Au / Al2O3 electrode is prepared and assembled.Three-phase polymerization is carried out with different current density.Use mixture experimental design method
preparation process of nanostructure of PANI / Au / Al2O3 electrode is optimized.Results show that the stability of PANI / Au /Al2O3 electrode is the best when polymerization current density is fixed at 40
60 and 80 μA / cm2
respectively
and the aggregate current density chan
ge from small to large.Maintaining polymerization charge at 35 m C
as threephase charge ratio is 0.35 ∶ 0.33 ∶ 0.32
the maximum sensor resistance rate of the 9 958 × 10-6acetone is7.55 %.As the acetone gas concentration in the range of(475
1 189) × 10-6and(23
118) × 10-6
corresponding sensitivities are 1.2 × 10-3and 6.4 × 10-3% /10-6
and the average response time is 3 min.
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references
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