可控粒径纳米硫化镉的制备

Controllable preparation of nano-cadmium sulfide with different particle sizes

采用溶剂热法,通过改变实验条件,得到影响粒径的主要因素和影响规律;在此基础上,制备了平均粒径范围是2.5~105 nm的六方球形纳米硫化镉。结果表明,硫源和镉源、S/Cd物质的量比和溶剂用量是影响粒径的主要因素。不同硫源、镉源适用于制备不同粒径范围的纳米硫化镉,采用TAA、乙酸镉并改变S/Cd配比和溶剂体积可制备出平均粒径在2.5~21.6 nm的纳米硫化镉;采用硫脲和硝酸镉并改变S/Cd配比可制备出平均粒径在38.5~105 nm的纳米硫化镉;纳米硫化镉的粒径随S/Cd物质的量比的增大而增大;随溶剂用量的增加而增大;反应温度对纳米硫化镉的粒径没有影响。纳米硫化镉的可控粒径的制备方法对纳米硫化镉的制备、研究与应用具有着重要的参考价值。

Wurtzite spherical nano-cadmium sulfide with an average particle size range from 2.5 nm to 105 nm were prepared by solvothermal method and changing experimental conditions.The results show that:sulfur source and cadmium source,molar ratio of S/Cd and dosage of solvent are the main factors of influencing the particle size of nano-cadmium sulfide.Different sulfur sources and cadmium sources are suitable for the preparation of nano-cadmium sulfide with different particle size ranges:nano-cadmium sulfide with an average particle size range from 2.5 nm to 21.6 nm can be prepared by using TAA,cadmium acetate and changing the molar ratio of S/Cd and solvent volume;nano-cadmium sulfide with an average particle size range from 38.5 nm to 105 nm can be prepared by using thiourea and cadmium nitrate and changing the molar ratio of S/Cd.The particle sizes of nano-cadmium sulfide increase with the increase of the molar ratio of S/Cd and increase with the increase of the dosage of solvent.Reaction temperature has no influence on the particle size of nano-cadmium sulfide.The controllable preparation method of the nano-cadmium sulfide with particle size has important reference value for the preparation,research and application of nano-cadmium sulfide.