气固反应法制备Ag@Ag2S核壳纳米颗粒
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摘要
采用两步法了合成Ag@Ag2S核壳纳米颗粒。首先以无水乙醇为还原剂,PVP(K-30)为分散剂,AgNO3为原料,采用溶剂热法合成出银纳米颗粒,随后在真空管式炉中对银纳米粉体进行硫化。紫外可见吸收光谱(UV-vis),X射线衍射(XRD),透射电子显微镜(TEM)的结果表明,以450℃加热硫粉,银粉所处位置为80℃,硫化时间为20~80min,成功制备出了Ag@Ag2S核壳结构纳米颗粒,颗粒粒径约为100±30nm。
Ag@Ag2S core-shell nanoparticles were synthesized by a two-step method. Firstly, silver nanoparticles were prepared by a solvothermal method using anhydrous ethanol as the reducing agent, PVP(K-30) as dipersant and Ag NO3 as raw material; Secondly, Ag@Ag2S core-shell nanoparticles were synthesized by the sulfidization of Ag nanoparticles in vacuum atmosphere. The samples were characterized by UV-visible absorption spectroscopy(UV-vis), X-ray diffraction(XRD), and transmission electron microscopy(TEM). The results show that Ag@Ag2S core-shell nanoparticles with an average diameter of 100±30 nm are synthesised by vapor(S)-solid(Ag) reaction at 80 °C for 20~80 min with S vapor from evaporation of S powder at 450 °C.
Ag@Ag2S core-shell nanoparticles were synthesized by a two-step method. Firstly, silver nanoparticles were prepared by a solvothermal method using anhydrous ethanol as the reducing agent, PVP(K-30) as dipersant and Ag NO3 as raw material; Secondly, Ag@Ag2S core-shell nanoparticles were synthesized by the sulfidization of Ag nanoparticles in vacuum atmosphere. The samples were characterized by UV-visible absorption spectroscopy(UV-vis), X-ray diffraction(XRD), and transmission electron microscopy(TEM). The results show that Ag@Ag2S core-shell nanoparticles with an average diameter of 100±30 nm are synthesised by vapor(S)-solid(Ag) reaction at 80 °C for 20~80 min with S vapor from evaporation of S powder at 450 °C.
引文
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[3]Terabe K,Hasegawa T,Nakayama T et al.Nature[J],2005,27(1):433
[4]Michael C.Michael,Jin Z Zhang.The Journal of Chemical Physics[J],1998,108(8):3119
[5]Dominik Bruhwiler,Claudia Leiggener,Stephan Glaus et al.The Journal of Physical Chemistry B[J],2002,106(15):3770
[6]Hull S,Keen D A,Sivia D S et al.Journal of Physics:Condensed Matter[J],2002,14(1):L9
[7]Kitova S,Eneva J,Panov A et al.The Journal of Imaging Science and Technology[J],1994,28(5):484
[8]Yooichi Hirose,Haruo Hirose.Journal of Applied Physics[J],1976,47(6):2767
[9]Liang Changhao,Terabe Kazuya,Hasegawa Tsuyoshi et al.Small[J],2005,1(10):971
[10]Liang Changhao,Terabe Kazuya,Hasegawa Tsuyoshi et al.Nanotechnology[J],2007,18(48):485 202
[11]Wang Hailiang,Qi Limin.Advanced Functional Materials[J],2008,18(8):1249
[12]Gerald Mc Donnell,A Denver Russell.Clinical Microbiology Reviews[J],1999,12(1):147
[13]Vladimir Djokovic,Radenka Krsmanovic,Dusan K Bozanic et al.Colloids and Surfaces B:Biointerfaces[J],2009,73(1):30
[14]Kundu Manisha,Terabe Kazuya,Hasegawa Tsuyoshi et al.Journal of Applied Physics[J],2006,99(10):103 501
[15]Sun Jialin,Zhu Jialin,Zhao Xingchen et al.Nanotechnology[J],2011,22(3):035 202
[16]Niu Man(牛曼),Jiang Yang(蒋阳).Materials Science and Engineering of Powder Metallurgy(粉末冶金材料科学与工程)[J],2007,12(3):183