Pechini溶胶-凝胶法制备SiO_2/TiO_2复合微粒  

Preparation of SiO_2/TiO_2 composite particles by Pechini sol-gel method

作　　者：伍媛婷[1] 王秀峰[1] 宋峰涛 仝小飞 

机构地区：[1]陕西科技大学材料科学与工程学院,陕西西安710021 [2]彩虹集团公司,陕西咸阳712000

出　　处：《功能材料与器件学报》2012年第4期318-321,共4页Journal of Functional Materials and Devices

基　　金：陕西省自然科学基金(No.2010JQ6006;No.2009JM6008)

摘　　要：采用超声Stber法制备了单分散性的纳米载体SiO2,再采用Pechini溶胶-凝胶制备法制备出SiO2/TiO2复合微球。通过X射线衍射仪、场发射扫描电子显微镜(FESEM)对粉体的晶型和显微形貌进行测试分析。结果表明:纳米载体SiO2球形颗粒为无定形态,TiO2粉体为形貌多样的块状颗粒,大颗粒粒径大于10μm;Ti/Si(摩尔比)的变化明显影响合成复合粉体的形貌和粒径,当Ti/Si=1:3时可获得球形复合微球,且不存在块状颗粒。Monodisperse SiOz particles were synthesized by Sttiber method using ultrasound field. The SiO2/TiO2 core - shell particles were prepared by Pechini sol - gel method. The crystal phases and mi- cromorphology were characterized by X - ray diffraction （XRD） and Scanning electron microscope （SEM）. The results show that the SiO2 particles are monodisperse non -crystalline solid particles about 300nm. The SEM images of TiO2 powders show wide distribution of TiO2 particles having varied shape. And the large TiO2 particles are larger than 10μm. The micromorphology of SiO2/TiO2 particles changes significantly with the increment of Ti/Si （mol/mol）. SiO2/TiO2 core -shell particles could be obtained when Ti/Si = 1：3.

关 键 词：PECHINI 溶胶-凝胶法 二氧化硅 二氧化钛 复合微球 

分 类 号：TB33[一般工业技术—材料科学与工程]