Ag@Ag2S核壳结构纳米粒子的合成及光热转换性能研究

Studies on the synthesis and photothermal conversion performances of Ag@Ag2S Core-shell nanoparticles

由于核壳结构的硫化银纳米材料不仅具有特殊的光学、电学性质而且还具有生物相容性,因此Ag@Ag2S纳米材料的研究受到了国内外学者的高度关注。本课题以硫酸银或硝酸银为银源,以CTAB(十六烷基三甲基溴化铵)或聚乙烯吡咯烷酮为分散保护剂,以葡萄糖、聚乙烯吡咯烷酮或甲酸为还原剂,用硫代硫酸钠对所得的银纳米粒子进行硫化,将产物用SEM和EDS进行分析,证明得到了具有核壳结构的Ag@Ag2S纳米粒子。最后对所得的Ag@Ag2S纳米粒子进行光热转换性能研究,表明了用聚乙烯吡咯烷酮做还原剂得到的Ag@Ag2S纳米粒子光热转换性能最好。

The silver sulfide nanomaterials with core-shell structure not only have special optical and electrical proformanes,but also have biological compatibility.Therefore,Ag@Ag2S nanomaterials have received great attention from scholars at home and abroad.In this project,silver sulfate or silver nitrate was used as silver source,CTAB(cetyl trimethyl ammonium bromide)or polyvinylpyrrolidone as dispersion protector,glucose,polyvinylpyrrolidone or formic acid as reducing agent,and the reduced silver nanoparticles were sulfide with sodium thiosulfate.The products was analyzed by SEM and EDS,and it was confirmed that Ag@Ag2S nanoparticles having a core-shell structure were obtained.Finally,the photothermal conversion properties of the Ag@Ag2S nanoparticles were studied.The results show that the Ag@Ag2S nanoparticles obtained by using polyvinylpyrrolidone as reducing agent have the best photothermal conversion properties.