Synthesis and characterization of Cu-SnO₂ nanoparticles deposited on glass using ultrasonic spray pyrolysis and their H₂S sensing properties

High quality 3%Cu-SnO₂ nanoparticles have been prepared onto the glass substrate by using novel and economical ultrasonic spray pyrolysis technique. The X-ray diffraction patterns showed that 3% Cu-SnO₂ nanoparticles formed in tetragonal rutile structure. The intensities of peaks shown by X-ray pattern were indexed as (110), (101), (200) and (211). The microstructure, surface morphology, particle size and elemental properties of 3%Cu-SnO₂ nanoparticles were characterized using, scanning electron microscope (SEM), and Transmission electron microscopy (TEM). These nanoparticles were tested for H₂S sensors applications. It was observed that 3% Cu-SnO₂ nanoparticles exhibited remarkable sensitivity to H₂S (200 ppm) gas at 150°C, more precisely showing good response and recovery.