Abstract:In order to study the gas sensitivity of Ag/TiO2 composite film to formaldehyde gas

the surface plasmon resonance (SPR) technology was adopted to build the experimental test platform

and the test results were obtained. With the change of the concentration of formaldehyde gas

the position

depth and width of the absorption peak of the resonance absorption peak of the SPR curve will change. The relationship between SPR resonance Angle and formaldehyde concentration was analyzed

and the sensitivity and resolution of different formaldehyde concentrations were calculated. The results show that with the continuous increase of formaldehyde concentration

the sensitivity is increasing

and the resolvable formaldehyde concentration is getting smaller and smaller