Surface characteristics of hydrous silica-coated TiO2 particles
Surface characteristics of hydrous silica-coated TiO2 particles
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DOI：
10.1016/s0032-5910(01)00470-3
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发表时间：
2002-03-11
影响因子：
5.2
通讯作者：
Jin, Y
中科院分区：
文献类型：
--
作者：
Lin, YL;Wang, TJ;Jin, Y
对水合二氧化硅包覆的 TiO2 颗粒的表面特性进行了实验研究。使用不同的分析技术来表征 TiO2 颗粒上的氧化硅涂层。高分辨率透射电子显微镜（HRTEM）、zeta电位分析仪和X射线光电子能谱（XPS）分析表明，水合二氧化硅连续包覆在TiO2颗粒表面。根据包覆颗粒上O 1s 和Ti2p(3/2)结合能的化学位移以及FTIR吸收带分析，推测包覆膜中的Si氧化物通过Ti-O-Si化学键结合到TiO2颗粒表面。致密薄膜涂层可以显着改变 TiO2 颗粒的动电行为。 (C) 2002 Elsevier Science B.V. 保留所有权利。
The surface characteristics of hydrous silica-coated TiO2 particles are experimentally studied. Different analytical techniques were used to characterize the Si oxide coatings on TiO2 particles. The high-resolution transmission electron microscope (HRTEM), zeta-potential analyzer and X-ray photoelectron spectroscope (XPS) analyses show that hydrous silica is continuously coated on the surface of TiO2 particles. From the chemical shift of binding energy of O 1s and Ti2p(3/2) on coated particles and FTIR analyses of absorption band, it is inferred that Si oxide in the coating film is combined onto TiO2 particle surface through chemical bond of Ti-O-Si. The electrokinetic behavior of TiO2 particles can be modified significantly by dense film coating. (C) 2002 Elsevier Science B.V. All rights reserved.