Enhancement of NH3 gas sensing with Ag-Pt co-catalyst on SnO2 nanofilm towards medical diagnosis

Exhaled breath analysis is a noninvasive diagnostic method for fatal disease monitoring and screening, which recently gained extensive interest of researchers worldwide emphasizing on the development effective chemiresistive gas sensor practical application. Here, Ag-Pt bimetallic nanoparticles were used to decorate nanofilms SnO2 making different sensors with high performance. We found that bimetal alloy improved performance significantly super sensitivity as compared separate Ag Pt catalyst. The right ratio made very sensitive NH3, so it was able quickly (12 s) detect 1 parts-per-million NH3 response 4.31 at temperature 250 °C. limit detection less than 10 parts-per-billion. negligibly affected by humidity interfering gases. results showed tiny, robust, inexpensive developed in this work can be early diagnosis via monitoring.