Acta Phys. -Chim. Sin. ›› 2003, Vol. 19 ›› Issue (07): 621-625.doi: 10.3866/PKU.WHXB20030711

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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

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