METHOD FOR OBTAINING A HYDROGEN CHLORIDE SENSOR IN THE AIR Russian patent published in 2023 - IPC G01N21/64 C01F7/02 C25B1/50 C01D3/00 C01G21/16 C30B29/62 B82Y40/00 

FIELD: chemical industry.

SUBSTANCE: substrate is prepared by nanostructuring it to obtain aluminium oxide with an island surface morphology. To do this, a thin film of aluminium is applied to the substrate by thermal deposition, then it is immersed in a 0.3 M solution of oxalic acid and anodized at a voltage of about 7 V until the current stops flowing through the structure. Wire-like perovskite nanocrystals of CsPbBr₃ are synthesized by salting out drops of a 0.1 M solution of perovskite precursors in the presence of water-2-propanol azeotrope vapour with a concentration of 1-2 mg/cm³ at 50-70°C for at least 5 minutes and applied to the specified nanostructured substrate to obtain a hydrogen chloride sensor in the air, characterized by increased sensitivity and an extended detection range.

EFFECT: aluminium oxide with an island surface morphology.

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