摘要
以ＳｎＣ１４．５Ｈ２Ｏ为原料，用水热法制备了粒度均匀的纳米ＳｎＯ２微粉；研究了反应温度、介质的酸度和反应物浓度等因素对ＳｎＯ２微晶形成、粒子尺寸及产率的影响。Ｘ射线物相分析表明，在酸性介质中，不同温度（１２０～２２０℃）下所形成的产物都是四方晶系ＳｎＯ２．适当降低反应介质的酸度有利于ＳｎＯ２粒子尺寸的减小和产率的提高。随反应温度升高，ＳｎＯ２粒子逐渐长大，当ｐＨ＝１．４５时，粒子的平均尺寸由大约２ｎｍ（１２０℃）增加到６ｎｍ（２２０℃）。
Uniform nanosized SnO2 particles were prepared by a hydrothermal method using SnC14.5H2O as the starting material.The influences of reaction temperature,acidity in reaction medium and concentration of reactant on the formation,morphology and particle size of SnO2 crystallite were investigated.The XRD analysis showed that the products formed at different temperatures(120～￣220℃) in acid medium were all tetragonal SnO2. With raising reaction temperature,particles grew gradually.Their particle sizes were ca.2 nm(120℃ )～6 nm(220℃) in [SnC14]=1 mol/L,PH=1.45,respectively.Decreasing the acidity in reaction medium appropriately(for example PH=1.45) favored a decrease in particle size and an increase in yield.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1996年第6期833-837,共5页
Chemical Journal of Chinese Universities
基金
国家高技术项目
