Dear Ramazan Kazhdanbekov, the question about solvents and solubility of PANI wsa treated so many times at RG platform, please check these threads by simple search. PANI has no solvent, the best you can get roughly stable dispersion. If solubility of PANI is crucial for processing gas sensors, then try low molecular mass one, may be you will be lucky to form a more or less good processable solution. My Regards

Ramazan Kazhdanbekov Try with cyclohexane and 1-pentanol. For more detail you can refer following article.

Facile synthesis of palladium nanoparticle doped polyaniline nanowires in soft templates for catalytic applications

https://iopscience.iop.org/article/10.1088/2053-1591/aa5947/meta

Please have a look at the following RG threads.

https://www.researchgate.net/post/What_are_the_best_solvents_for_Polyaniline_emeraldine_salt

https://www.researchgate.net/post/What-is-the-best-solvent-for-base-polyaniline-and-polystyrene#:~:text=Yes%2C the best solvent for,and other non-polar solvents!&text=PS is soluble in Tetrahydrofuran,DMF but not 100%25 soluble.

he graphene–PANI ratio in the nanocomposite polymer film was optimized at 1:2. For the film's preparation they used N-methyl-2-pyrrolidone (NMP) solvent. The sensing behaviors of the films were analyzed at different temperatures (30, 50, and 100°C) for 100 ppm toluene in air.

PANI-Based Sensors: Synthesis and Application - IntechOpen

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IntechOpen

https://www.intechopen.c

A review of composite conducting polymer-based sensors ...

ScienceDirect.com

https://www.sciencedirect.com › science › article › pii

by A Verma · 2023 · Cited by 24 — PANI has increased sensing ... Highly sensitive and selective chemiresistor gas/vapor sensors based on polyaniline nanocomposite: A comprehensive review.