作　　者： ; ; ; ; ;

机构地区： 广东工业大学轻工化工学院

出　　处： 《无机盐工业》 2007年第8期13-15,共3页

摘　　要： 分别采用微乳液法(辛基酚聚氧乙烯醚+正己醇/环己烷/水组成的微乳液体系)和柠檬酸溶胶-凝胶法制备了镁与铈、锌、锆复合掺杂的纳米二氧化锡颗粒,通过热分析(TG-DTA)、X射线衍射(XRD)、比表面积测定(BET)、红外吸收光谱(FT-IR)和紫外-可见光谱(Uv-Vis)对其结构进行表征。结果表明,两种方法制备的产物均为金红石结构,微乳液法制备的颗粒较后者具有较小的晶粒粒径、较大的比表面积和紫外吸收边;复合掺杂后,样品的粒径减小,比表面积增大,样品的紫外-可见吸收发生红移;其中,镁-铈复合掺杂的样品具有最小的晶粒粒径和最大的比表面积,分别为4.53 nm和78.50 m2/g;复合掺杂能够抑制二氧化锡颗粒生长,增大其比表面积。 Mg - Ce/Zn/Zr composite doped SnO2 nanoparticles were prepared by a W/O microemulsion { be composed of triton X-100 ＋ 1 -hexanol/cyclohexane/water） method and citric acid sol- gel method, and were characterized by TG -DTA,X -ray diffraction （XRD） ,BET,fourier transform infrared （FT - IR） spectroscopy and Uv -Vis diffuse reflectance spectra. It was found that the SnO2 synthesized through the two types of techniques were all rutile phase. The SnO2 by microemulsion method had relatively smaller crystalline size,larger specific surface areas and farther Uv - Vis absorption spectra compared with that by citric acid method. The crystalline size of SnO2 decreased,and its surface area increased along with a considerable red shift in the absorbing band edge after SnO2 was modified. The Mg - Ce doped SnO2 has the smallest particle grain and the largest surface area,which is 4. 53 nm and 78.50 m^2/g,respectively. The composite doped treatment can inhibit the growth of the SnO2 size and enhance its surface area effectively.

关 键 词： 掺杂二氧化锡 纳米颗粒 微乳液法 柠檬酸溶胶 凝胶法

领　　域： [化学工程]