SnO2 nanoparticles were processed by hydrothermal synthesis from stannic chloride and ammonia. The effects of hydrothermal temperature, hydrothermal time and initial pH value of solution on properties and morphology of SnO2 nanoparticles were investigated. The optimal technological parameters were determined, and the abnormal phenomena of SnO2 nanorods occured in water thermal synthesis process were noted. The results show that SnO2 nanoparticles can be prepared with tetragonal rutile structure. The particle size is in the range of between 5~12 nm, and the morphology is nearly spherical. In the reaction solution concentration of 0.5~2.0 mol/L conditions, with the reaction solution concentration, preparation of powder size average diameter is a linear growth; in the hydrothermal synthesis temperature range of 160~220 ℃ average particle size of SnO2 powder increases from 5.1 nm to 9.8 nm with increasing temperature until 200 ℃. Above 200 ℃, a drop of particle size is observed; in hydrothermal synthesis time range of 6~30 h, with the extension of reaction time, the average diameter of the prepared powder of the whole body is a rising trend, but when extending to 20 h it will drop; with the increase of pH value, the average prepared powder diameter decreases. Reacted at 200 ℃ for 20 h with pH value of 10 and the solution concentration of 1.0 mol/L, the powder obtained shows superior comprehensive properties, high uniformity, good dispersion.
|Number of pages||7|
|Journal||Fenmo Yejin Cailiao Kexue yu Gongcheng/Materials Science and Engineering of Powder Metallurgy|
|Publication status||Published - 2015 Dec 1|
- Hydrothermal synthesis
- Powder size
ASJC Scopus subject areas
- Metals and Alloys