NANOPOROUS MATERIAL FOR SENSITIVE ELEMENTS OF GAS SENSORS AND METHOD OF PRODUCTION THEREOF Russian patent published in 2020 - IPC G01N27/12 B82B1/00 

FIELD: machine building.

SUBSTANCE: invention can be used to create gas sensors intended for detecting a wide range of gases and vapours. Essence of the invention is that in the method of producing nanoporous material for sensitive elements of gas sensors at a preliminary step, a sol is obtained, wherein the sol is obtained by mixing silanes with an organic solvent and an aqueous acid solution with further stirring for 10–15 minutes and subsequent holding for 24 hours at room temperature, after which carbon nanomaterial is added to obtained sol at preliminary stage at weight ratio of carbon nanomaterial:sol = 1:(46–2300) and sol is mixed with carbon nanomaterial in ultrasonic bath for two hours, after which gel agent NH₃ is added to the mixture of sol and nanomaterial in the form of ammonia water with mixing for gelation for 2–3 minutes and then the obtained gel is held for 24 hours at room temperature for final formation of structure of composite material which is subjected to aging, for which it is placed in solvent for 24 hours with replacement of solvent every 8 hours and then performing its supercritical drying, for which is loaded into a sealed unit with liquefied carbon dioxide in the supply mode, inside which pressure 120–180 atm is set and maintained and temperature 40–100 °C for 6–12 hours.

EFFECT: technical result is enabling creation of high-sensitivity gas sensors designed to detect a wide range of gases and vapours.

1 cl