Preparation And Properties Of Tin Oxide Nanocrystals

As one of the important wide band-gap semiconductor oxide materials, tin dioxide (SnO2) has been widely used in many applications such as transparent conductive glass, transparent conductive nano-powder, gas sensors, and catalysts. Nano-technology has become one of the main ideas that improve the performance of materials. The research of nano tin dioxide has also become a hot spot.In this paper, we studied the preparation and properties of the pure tin dioxide, doped tin dioxide and indium oxide containing tin dioxide nanocrystalline powders. The main research contents are as follows:1. Preparation and gas sensing properties of SnO2.nanoparticles. SnO2 nano-powders with small size and high specific surface area were synthesized by the high temperature pyrolysis and solvothermal methods, respectively in 1-butyl-2,3-dimethyl imidazole tetraphenyl borate ionic liquid and ethylene glycol. The influence of reaction conditions on the nanocrystalline powders was investigated. And the gas sensing properties of powders was researched.2. Preparation and characterization of antimony and indium doped SnO2 nanoparticles. Antimony and indium doped tin oxide nano-powders were prepared in 1-butyl-2,3-dimethyl imidazole tetraphenyl borate ionic liquid and ethylene glycol, respectively, by the high temperature pyrolysis and solvothermal methods. The powders were characterized using a variety of test methods.3. Preparation and sintering properties of Mn-doped tin oxide nano powders. Mn-doped tin oxide nanoparticles were synthesized by hydrothermal method. Doping Manganese effectively reduced the particle size of powders and increased the specific surface area of powders. The powder was pressureless sintered. Doping Manganese promoted tin oxide powders sintering and lowered the sintering temperature.4. Preparation and sintering of indium tin oxide nano-powders. Spherical indium tin oxide nanoparticles were synthesized by combustion method using citric acid as fuel and nitrate as oxidant. The formation mechanism of powders was discussed, and the powder was characterized. The results indicated that the sintered indium tin oxide nano-powders have a good performance of sintering, and the initial sintering temperature is 900℃, the relative density is 97.3% after 1400℃sintered.