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提出结合Ｃｄ（ＯＨ）２ 选择性包覆与光分解腐蚀法缩小ＣｄＳ纳米微粒的尺寸分布， 并通过对ＣｄＳ纳米微粒发射光谱的研究证实了这一设计思想． 以多聚磷酸钠（ＨＭＰ）为稳定剂合成ＣｄＳ纳米微粒， 再通过Ｃｄ２＋ 与ＯＨ－ 的选择性包覆在大粒径的ＣｄＳ纳米微粒表面形成一层Ｃｄ（ＯＨ）２， 然后溶液置于日光下辐照处理， 数天后， 未经包覆的小粒径ＣｄＳ纳米微粒被日光腐蚀分解， 溶液中只剩下被Ｃｄ（ＯＨ）２ 包覆的大粒径ＣｄＳ纳米微粒， 这样即可达到缩小ＣｄＳ纳米微粒尺寸分布的目的．
The size distribution of CdS nanoparticles was selectively reduced by Cd (OH) 2 selective coating and photodegradation etching. The design of this CdS nanoparticle was verified by studying the emission spectra of CdS nanoparticles. CdS nanoparticles were synthesized by using sodium polyphosphate (HMP) as stabilizing agent, and then Cd (OH) 2 was formed by the selective coating of Cd2 + and OH- on the surface of CdS nanoparticles with large size. The solution was then placed in sunlight Under irradiation, a few days later, uncoated CdS nanoparticles with small particle size were decomposed by sunlight and only CdS nanoparticles coated with Cd (OH) 2 were left in the solution, which could be reduced The purpose of CdS nanoparticle size distribution.