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.
出处
《物理化学学报》
SCIE
CAS
CSCD
北大核心
2003年第7期621-625,共5页
Acta Physico-Chimica Sinica
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
SnO2 nanocrystal
silane coupling reagent KH-570
X-ray photoelectron spectroscopy (XPS)
surface modification
binding energy
