表面处理剂对CuInS_2纳米晶体分散性的影响

Effect of surface treating agents on dispersity of copper indium sulfide nanocrystalline

选用表面活性剂聚乙烯醇缩丁醛(PVB)和聚乙烯吡咯烷酮(PVP),以及偶联剂KH550、KH570等表面处理剂,来研究体系中添加表面处理剂对溶剂热法合成的CuInS2纳米晶体分散性的影响.利用X-射线粉末衍射仪、EDS能谱、扫描电镜(SEM)和紫外-可见近红外分光光度计对纳米晶体的结构、原子配比、形貌和光吸收性能等进行表征.结果表明:体系中添加少量(总质量的0.1%)表面处理剂制备的CuInS2纳米晶体团聚现象能得到有效改善,其中偶联剂KH570和表面活性剂PVP改性效果佳.

By choosing surfactant polyvinyl butyral（ PVB） and polyvinylpyrrolidone（ PVP）,as well as the coupling agent KH550 and KH570 as surface treating agents,we study the influence of adding surface treating agents on dispersity of copper indium sulfide nanocrystalline,which was synthesized via a solvothermal method. Structure,atomic ratio,morphology and light absorption performance of the nanocrystal were characterized by X-ray diffraction（ XRD）,Energy Dispersive Spectrometer（ EDS）,Scanning Electron Microscope（ SEM）,and UVVis spectrophotometer. Results showed that with the small amount（ 0. 1% of total mass） of coupling agent KH570 and surfactant PVB and PVP,the agglomeration of CuInS 2 nano-crystals could be improved. Among them KH570 and PVP was better.