Preparation, Characterization, and H₂S Sensing Performance of Sprayed Nanostructured SnO₂ Thin Films

Abstract

Nanostructured SnO 2 thin films were prepared by spraying tin chloride dihydrate onto the heated glass substrate at 250 • C. The films were fired at 500 • C. As-prepared thin films were studied using XRD and FESEM to know crystal structure and surface morphology. The average crystallite and grain size observed from XRD and FF-SEM was found to be less than 33 and 67 nm, respectively. The films sprayed for 30 min were observed to be most sensitive to H 2 S at 250 • C. The results are discussed and interpreted.

Studies on Spray Pyrolised Nanostructured SnO₂ Thin Films for H₂ Gas Sensing Application

“…Nanostructured SnO 2 films were prepared on preheated glass substrate using a spray pyrolysis technique and the experimental set up is described elsewhere [13]. Spray pyrolysis is basically a chemical process, which consists of a solution that is sprayed onto a hot substrate held at high temperature, where the solution reacts to form the desired thin film.…”

“…Before the deposition of SnO 2 thin films, glass slides were cleaned with detergent and distilled water, then boiled in chromic acid (0.5 M) for 25 min, then slides washed with double distilled water and further ultrasonically cleaned for 15 min. Finally the substrates were degreased in AR grade acetone and used for spray deposition technique [13].…”

LPG Gas Sensing Performance of Nanostructured CdSnO₃ Thin Films

“…It is wellknown that the response of the metal-oxide semiconductor sensors is mainly determined by the interactions between a target gas and the surface of the sensors. Due to the greater surface area of nanostructured materials, its interaction with the adsorbed gases is stronger, leading to higher gas response [13]. …”

“…Among these techniques, spray pyrolysis has proved to be simple, reproducible and inexpensive, as well as suitable for large area applications. In addition, spray pyrolysis opens up the possibility to control the film morphology and particle size in the nanometer range [13][14][15]. Out of these approaches spray pyrolysis is a versatile technique for deposition of metal oxides.…”

Studies on Structural, Morphology and Electrical Properties of Chemically Sprayed WO₃-V₂O₅ Nanocompositesthin Films

“…Besides the simple experimental arrangement, high growth rate and mass production capability for large area coatings make them useful for industrial as well as solar cell applications. In addition, spray pyrolysis opens up the possibility to control the film morphology and particle size in the nanometer range [21].…”