Preparation of Tin Oxide-Based Metal Oxide Particles for Gas-Sensing Application

초록

Tin oxide-based metal oxide particles for gas-sensing application were prepared by wet process with organic-inorganic hybrid particles in an alcoholic solution. An aqueous solution of Tin (II) chloride, a precursor for tin oxide particles, was added to the dispersion of organic-inorganic hybrid particles. The reaction was performed in the variation of metal salt concentration, reaction temperature, and reaction time. The resulting tin oxide-deposited particles were filtered, washed, and then dried at 120 °C for 12 h in a vacuum oven. In various conditions, the change in size, morphology, and thickness of tin oxide deposited on the hybrid particles was investigated in this study. Moreover, the changes in physical property and structure of the obtained particles were also studied after calcination at different temperatures. The size and morphology of the resultant particles were observed with field emission scanning electron microscopy (FE-SEM) and transmission electron microscopy (TEM). The different characterization of the obtained particles was preformed by infrared spectroscopic analysis (IR), and thermogravimetric analysis (TGA). The changes in crystallinity and structure of resultant materials were confirmed by X-ray diffraction (XRD) patterns.