用硫脲为表面修饰剂,并用PVP(聚乙烯吡咯烷酮)为稳定剂在乙醇水溶液中合成了粒径分布均匀、性能稳定、有机物修饰的CdS纳米颗粒.重点分析了硫脲的引入对CdS纳米粒子晶体结构、粒径分布、紫外可见吸收光谱、红外光谱、光致荧光光谱(PL)的影响.发现硫脲修饰使得CdS纳米粒子的粒径更小,粒径分布更加均匀,并且有效地抑止了PVP对CdS荧光淬灭,在PL光谱上观察到了CdS的带隙发光.
Surface-modified CdS nanoparticles were synthesized by using thiourea. PVP (poly N-vinyl-2-pyrrolidone) was used as the stabilizer. The structure and characterization of the nanoparticles were characterized by means of TEM, XRD, UV-absorption, FT-IR, and PL spectroscopies. The results demonstrate that the surface-modified CdS nanoparticles have excellent properties in the size distribution and optic qualities.
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