摘要
利用溶胶-凝胶法制备了PVP表面修饰的CdS纳米晶粒。考察了影响纳米CdS制备的两个重要因素Cd2+/S2-和PVP,及其作用机理。确证表面过剩S2-和PVP在反应体系中的作用是在较高浓度下制备纳米CdS的两个重要因素,进一步确定了PVP的最佳用量。通过TEM、ED、XRD、FT-IR等手段对合成的纳米粒子进行了结构表征,最小粒径为7～10nm,闪锌矿构型,粒子大小及形貌可通过改变Cd2+/S2-及反应物浓度来控制。最后给出了CdS/PVP纳米晶粒的结构模型。
CdS nanocrystals surface-capped wi th PVP were synthesized by Sol-Gel me thod.Two important influential factors(Cd 2+ /S 2- and PVP)for the preparation of the CdS nanocrystals and their influential mechan isms were investigated.It is confirmed that t he effect of superfluous S 2- and addition of PVP on the reaction sy stem are two important factors in the preparatio n of the CdS nanocrystals in high Cd 2+ and S 2- concentration solution,and the best dosage of PVP was determined.The structure was characterized by means of TEM,ED,XRD and FT-IR techniques.It is found that the size of the minimal particles are 7～10nan ometers,and the configuration is haw-leyite and the size and shape can be co ntrolled by Cd 2+ /S 2- and the concentration of reactant.F inally,the structure model of CdS /PVP was sugge sted.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2002年第10期997-1002,共6页
Chinese Journal of Inorganic Chemistry
基金
国家自然科学基金资助项目(No.20076004)。
