一种无水无氧制备CdS纳米晶的新方法

Synthesis of CdS nanocrystals by a new method

以醋酸镉和硫为原料,采用二硫化四乙基秋兰姆TETD和2,2-二硫代二苯并噻唑为成核剂,利用无水无氧系统在ODE的溶液中制备了尺寸可控、单分散、均一的半导体CdS纳米材料。采用XRD、粒度分析、SEM技术分别表征产物的结构、粒度和形貌。通过改变两种成核剂的使用量及反应时间可以得到不同粒径的CdS纳米晶。研究表明,在一定范围内,成核剂使用量增加或者反应时间延长都会导致产物的粒度变大,因此通过调节成核剂的使用量和反应时间从而实现对CdS纳米晶的可控生长。

This paper reports a new synthetic method used Cadmium acetate and sulphur with the presence of nucleation initiators （Tetraethylthluram disulfide, 2,2＇-Dithio（bis）benzothiazole） for producing CdS nanocrystals. We have demonstrated that the nanocrystal nucleation and growth stages can be automatically separated in a homogeneous system with the presence of nucleation initiators. The as-prepared CdS nanocrystals are highly monodispersed and possess a zinc blende crystal structure. The structure and the size of the nanoparticles were analyzed by TEM, granularity analysis and XRD. To a certian extent, the size of CdS nanocrystals can be changed by altering the quantity of nucleation initiators and the reaction time.