物理化学学报 >> 2003, Vol. 19 >> Issue (05): 464-468.doi: 10.3866/PKU.WHXB20030518

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在线性壳聚糖膜内原位还原制备银纳米粒子及银单晶体

姚素薇;刘恒权;张卫国;王宏智;郑长峰   

  1. 天津大学化工学院,天津　300072
  • 收稿日期:2002-09-10 修回日期:2002-11-06 发布日期:2003-05-15
  • 通讯作者: 姚素薇 E-mail:gongzl@public.tpt.tj.cn

In-Situ Preparation of Silver Nanoparticles and Single Crystal in Linear Chitosan Films

Yao Su-Wei;Liu Heng-Quan;Zhang Wei-Guo;Wang Hong-Zhi;Zheng Chang-Feng   

  1. School of Chemical Engineering and Technology, Tianjin University, Tianjin　300072
  • Received:2002-09-10 Revised:2002-11-06 Published:2003-05-15

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摘要： 采用光还原方法，在线性壳聚糖膜内原位还原获得球形银粒子(粒径10～30 nm)和外观呈三角形、六边形的银单晶体(边长200～2000 nm)；采用电化学方法，在壳聚糖膜内制备了球形银纳米粒子，粒径为5～8 nm.用透射电子显微镜(TEM)、扫描电子显微镜(SEM)、红外光谱(IR)和X射线衍射(XRD)等测试技术对壳聚糖/银复合物进行了表征，对光还原过程中银晶体结构由多晶到单晶的转变原因进行了初步的分析和探讨.

关键词: 壳聚糖膜, 光还原, 电化学还原, 银纳米粒子, 银单晶体

Abstract: In the present paper, in-situ preparation of spherical silver nanoparticles(10～30 nm),triangular and hexangular single silver crystal(200～2000 nm) have been conducted in linear chitosan films by photochemical reduction. The spherical silver nanoparticles(5～8 nm) have also been obtained electrochemically in the film. The chitosan/Ag complex has been characterized by means of TEM, SEM, IR spectra and XRD, the preliminary analysis and discussion about the causes of changing of silver crystal structure from multi crystal to single crystal in photochemical reduction process have been carried out.

Key words: Chitosan, Photochemical reduction, Electrochemical reduction, Silver nanoparticles, Silver single crystal