Title: Study on gas-sensing properties of dodecylbenzenesulfonic acid doped polyaniline
Abstract: Aniline was oxidized by ammonium persulfate(APS) in dodecylbenzenesulfonic acid(DBSA) and HCl separately for the synthesis of polyaniline.By means of FT-IR spectra and TGA-DTA,the structural changes and thermal stability of intrinsic and doped polyaniline were measured.The influences of the doped different protonic acid on the gas-sensing properties of polyaniline were also investigated.The results reveal that the gas sensors based on PAn-DBSA have better sensitivity than PAn-HCl.The sensitivity of PAn-DBSA to 1 000×10-6 NH3 reaches 10.43,the response time is 30 s,recovery time is 3 min,at 20 ℃,when r(S:N) is 0.4~0.5.Long-term stability of sensitivity of acid doped polyaniline were also investigated.It can be concluded that DBSA doped polyaniline have better environmental stability.
Publication Year: 2008
Publication Date: 2008-01-01
Language: en
Type: article
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