表面修饰二氧化锡纳米微晶的制备与表征  

Preparation and Characterization of Surface-Modified SnO_2 Nanocrystals

作　　者：古凤才[1] 赵竹萱[1] 李英慧[2] 门娟[1] 严菊明[1] 刘瑞贤[1] 张丽华[1] 

机构地区：[1]天津大学理学院,天津300072 [2]天津大学电子信息工程学院,天津300072

出　　处：《物理化学学报》2003年第7期621-625,共5页Acta Physico-Chimica Sinica

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.The surface-modified SnO2 nanocrystals were prepared from SnO2 nanoparticles and silane coupling reagent KH-570 ( gamma-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.

关 键 词：表面修饰 二氧化锡 纳米微晶 制备 表征 硅烷偶联剂 X射线光电子能谱 结合能 

分 类 号：O614.432[理学—无机化学] TB383[理学—化学]