硫化银纳米溶胶的制备分析word论文.docx

Based on previous work, silver sulfide nanoparticles were synthesized by hydrothermal method. The influences of reaction parameters on the products were investigated. It was found that the formation of the rice-shape featured Ag2S nanoparticles depended mainly on the properties of sulfur source, the type and concentration of sulfur source, complexing agent, protecting agent. Silver sulfide
nanorice with an average length of about 30 nm has been synthesized at 120 ℃ for
10 h, using silver laurate( mol/L) and sodium sulfide( mol/L) as raw materials, n-butylamine(1 mL) plexing agent, polyvinylpyrrolidone as protecting agent. Compared with bulk silver sulfide, the obtained silver sulfide nanorice showed clear quantum confinement effect, which was testified by the re-markable blue shift of its UV-visible absorption edge and the large band gap energy of eV.
Key words:Semiconductor materials; silver sulfide nanoparticles; organic acid silver; conventional liquid-phase synthesis method; hydrothermal synthesis method;
目 录
第一章文献综述..........................................................................................................1
引言...........................................................................................................1
纳米半导体材料的特性及应用...............................................................2
纳米半导体材料的特性.................................................................2
纳米半导体材料的应用.................................................................3
纳米材料的制备方法...............................................................................4
硫化物纳米半导体材料的制备与研究现状...........................................5
硫化物纳米半导体材料的制备研究.............................................5
纳米硫化银的制备现状.................................................................8
本课题的研究内容及意义.....................................................................10
研究意义.........................................................