物理化学学报 >> 2003, Vol. 19 >> Issue (07): 621-625.doi: 10.3866/PKU.WHXB20030711

研究论文 上一篇    下一篇

表面修饰二氧化锡纳米微晶的制备与表征

古凤才;赵竹萱;李英慧;门娟;严菊明;刘瑞贤;张丽华   

  1. 天津大学, 理学院, 1电子信息工程学院, 天津 300072
  • 收稿日期:2002-12-23 修回日期:2003-02-20 发布日期:2003-07-15
  • 通讯作者: 古凤才 E-mail:gufengcai@eyou.com

Preparation and Characterization of SurfaceModified SnO2 Nanocrystals

Gu Feng-Cai;Zhao Zhu-Xuan;Li Ying-Hui;Men Juan;Yan Ju-Ming;Liu Rui-Xian;Zhang Li-Hua   

  1. School of Science, 1School of Electronic Information Engineering,Tianjin University, Tianjin 300072
  • Received:2002-12-23 Revised:2003-02-20 Published:2003-07-15
  • Contact: Gu Feng-Cai E-mail:gufengcai@eyou.com

摘要: 制备了硅烷偶联剂KH-570表面修饰的SnO2纳米微晶,通过FT-IR、XPS、TEM和TG-DTA对其结构和表面特性进行表征和研究. FT-IR和XPS分析结果确证了KH-570与SnO2表面是以化学键合或物理吸附方式相结合,粒子表面存在酯基等有机官能团的红外吸收特征;观测到KH-570中Si原子的Si2s和Si2p谱线. TEM分析表明,表面修饰反应增强了SnO2纳米微晶的疏水性和分散性.由XPS和TG的实测数据探讨了纳米粒子具有较低包覆量的可能原因.

关键词: 二氧化锡纳米微晶, 硅烷偶联剂KH-570, X射线光电子能谱, 表面修饰, 结合能

Abstract: The surface-modified SnO2 nanocrystals were prepared from SnO2 nanoparticles and silane coupling reagent KH-570 (γ-methacryloxy propyl trimethoxy silane). The chemical structure and surface characteristics of the sample were studied by FT-IR, XPS, TEM and TG-DTA techniques. The results indicate that the chemical binding and the physical adsorption between KH-570 and SnO2 have occured during the modification reaction. And the following items have also been obtained in this paper: (a)the characteristic absorption bands of some organic functional groups of KH-570 on the surface of SnO2 such as C=O and -C-O- were observed by FT-IR; (b) the silicon 2s and 2p spectra of silicon in silane coupling reagent on the surface of the post-modified SnO2 were detected with XPS; (c)the dispersivity and hydrophobicity in water were enhanced. Finally, the influence factors of the quantity of KH-570 on the surface of SnO2 were discussed on the basis of the investigatied results with XPS and TG.

Key words: SnO2 nanocrystal, Silane coupling reagent KH-570, X-ray photoelectron spectroscopy (XPS), Surface modification, Binding energy