COMPOSITION FOR MAKING SENSOR COATINGS BASED ON AQUEOUS SUSPENSIONS OF NANOPARTICLES AND METHOD OF PREPARING COMPOSITION Russian patent published in 2014 - IPC C22C13/02 C01G19/02 C01G30/00 C09D11/00 B82B1/00 

FIELD: chemistry.

SUBSTANCE: composition for making sensor coatings contains antimony-doped tin dioxide of the formula Sb_xSn_1-xO₂, where x=0.1-0.3, and water in ratio Sb_xSn_1-xO₂:H₂O = 89-87:11-13 wt %. The method of preparing the composition involves hydrothermal treatment of tin and antimony hydroxides at 170°C for 48 hours. The tin and antimony hydroxides are obtained by dissolving Sn and Sb metal in concentrated hydrochloric acid, 18-20 wt %, while adding 3-5 wt % concentrated HNO₃. The obtained solution is 2-3 times diluted with distilled water and a calculated amount of ammonia solution is added. Using a simple scheme, the disclosed method enables to obtain nanoparticles of said composition Sb_xSn_1-xO₂ with size of 30 nm and surface area of 154 m²/g, which can be used as the basic component of electroconductive ink for printing sensor arrays and microcontacts.

EFFECT: low labour and power consumption.

3 cl, 6 dwg, 3 ex