Abstract:

With thiourea and cadmium nitrate as raw materials,ethylene glycol was used as solvent,polyvinylpyrrolidone（PVP） was used as dispersant,polyacrylamide（PAM） or N,N-dimethylformamide（DMF） was used as growth regulator,and CdS nano-sized materials were successfully prepared by solvent-thermal method.The influence of dispersant and growth regu-lator on the synthesis of CdS nano-sized materials by solvent-thermal method was investigated.The results showed that CdS particles prepared by using only polyvinylpyrrolidone（PVP） as dispersing agent had a regular spherical shape and uniform particle size,and the minimum particle size was about 500 nm.PVP and DMF were the dispersion and growth regulator re-spectively,and the two synergistically inhibited the growth of CdS,and the CdS particle size was uniform,the minimum parti-cle size was about 250 nm.PVP and PAM were the dispersion and growth regulator respectively,the two synergistically inhibi-ted the growth of CdS,and the CdS particle had the regular spherical shape and uniform particle size,the minimum particle size was about 125 nm.XRD result indicated that the the synthesized CdS was pure phase CdS.The growth regulator had particle size multiplier effect.

Key words: CdS, solvent-thermal method, dispersant, regulator