温度控制对ATO纳米分散液水热生长的影响

以SnCl4·5H2O和SbCl3的共沉淀氢氧化物为原料,在水热过程中采用温度控制、分段加热的方法,制备了单分散的ATO纳米分散液。用XRD、TEM、X射线能量散射谱(EDS)和压片测电阻等方法,对ATO纳米粉进行了表征。结果表明:温度控制、分段加热的水热法,可以一步合成粒径为10~15nm,高比表面积、分散性好的ATO纳米晶导电粉体,在低温短时的条件下,同时实现了氧化物的掺杂和分散。并对生长机理做了初步探讨。

Influence of temperature control on the hydrothermal growth of dispersed ATO nanosuspension

Antimony-doped tin oxide (ATO) suspensions with a good dispersion were directly prepared by hydrothermal method using mixed Sb/Sn hydroxide solution as precursor, and temperature control was used during the crystal growth. The ATO particles were characterized by XRD, TEM, EDS and resistance test. X-ray diffraction shows that all Sb ions come into the SnO2 lattice to substitute Sn ions. The doping of Sb are improved through stage heat, compared with that at constantly high temperature. TEM images indicate the ATO nanoparticles show a good dispersion with the size range from 10~15 nm. The process of stage heat can enhance Sb doped level and realize the synthesis of doped oxide particles with a good dispersion under the low temperature in a short time. The possible growth mechanism is also explained.