氢氧焰燃烧合成纳米SnO_2/TiO_2复合颗粒的形貌与结构  

Morphology and Structure of TiO_2/SnO_2 Composite Nanoparticles Prepared in H_2/Air Flames

作　　者：杨宏昀[1] 康力[1] 李春忠[1] 

机构地区：[1]华东理工大学材料科学与工程学院超细材料制备与应用教育部重点实验室,上海200237

出　　处：《华东理工大学学报（自然科学版）》2004年第6期653-656,共4页Journal of East China University of Science and Technology

基　　金：国家自然科学基金(20236020;20176009);上海市基础研究重大项目(04DZ14002);教育部<跨世纪优秀人才培养计划>;上海市纳米科技专项基金

摘　　要：利用预混合氢氧焰燃烧合成了形态和结构不同的SnO2/TiO2复合纳米颗粒,颗粒呈多面体结构,形貌介于球形和立方方形之间,复合颗粒由同为四方晶系的SnO2和TiO2组成。在SnO2/TiO2复合颗粒中存在Sn—O—Ti键,没有出现相分离现象。复合颗粒表面的Ti∶Sn(mol∶mol,下同)比大于复合颗粒内部的Ti∶Sn,而且复合颗粒内部Ti∶Sn接近理论值。SnO_2-TiO_2 nanocomposite particles were prepared in premixed H_2-Air flames. The morphology and the structure of these particles were characterized by transmission electron microscopy (TEM), (X-ray) diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR) and Auger electron spectrum (AES). It was shown that these composite particles had a shape between sphere and tetragon and consisted of tetragon SnO_2 and TiO_2 which was mainly rutile. There were Sn—O—Ti bond in these particles. The elemental profiles of these composite particles were not uniform. Ti∶Sn was much more less on the surface than it inside the particles which was close to the feed ratios. This ratio changed greatly in the transition layer, within about 5 nm thickness.

关 键 词：氢氧焰 复合纳米颗粒 二氧化钛 二氧化锡 

分 类 号：TQ13[化学工程—无机化工]