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Preparation of single nanopartides and self assembled mesoporous structured materials using spray method

喷雾法制备单一纳米颗粒及自组装介孔结构材料

基本信息

批准号：
15360423
负责人：
OKUYAMA Kikuo
金额：
$ 9.73万
依托单位：
HIROSHIMA UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2005
项目状态：
已结题

项目摘要

The fabrications of nanoparticles and nanoparticle-based nanostructured materials via spray routes (spray pyrolysis and spray drying) were investigated. The low-pressure spray pyrolysis (LPSP) method is a modified spray pyrolysis method that introduces low pressure in the preparation of particles. It proved as a versatile method to produce wide range of nanomaterials, from simple oxide to multicomponent material. The capability of LPSP method on the preparation of nanoparticles was shown on the production of titania (TiO_2), barium titanate (BaTiO_3) and indium doped tin oxide (ITO) nanoparticles. We have successfully synthesized nickel, nickel oxide, and a doped phosphor material (Y_2O_3:Eu^<3+>) via LPSP method.A flame spray pyrolysis (FSP) method was designed for the preparation of nanoparticles. The capability of FSP method on the preparation of nanoparticles was shown on the production of submicron- and nanometer-sized red luminescent particles (Y_2O_3 :Eu^<3+>), and Strontium titanate (SrTiO_3:Pr^<3+>,Al^<3+>). Using the present method, all of particles were directly prepared without any post-heat treatments. The effect of the type of the atomizer, i.e., the ultrasonic nebulizer and the two-nuid nozzle sprayer, on the particle characteristics was also investigated.We have also developed the methods to produce powders as well as films that contained ordered pores. The spray drying method was used to prepared ordered porous powders in submicrometer diameter size. The pores were observed to be arranged into hexagonal packing, indicating the self-organization process occurred spontaneously during the solvent evaporation. We have successfully synthesized silica, alumina, titania porous powders and FePt porous film.

研究了喷雾工艺（喷雾热解和喷雾干燥）制备纳米颗粒和纳米颗粒基纳米结构材料。低压喷雾热解（LPSP）法是在制备颗粒过程中引入低压的一种改进的喷雾热解方法。它被证明是一种通用的方法，可以生产从简单的氧化物到多组分材料的各种纳米材料。LPSP法制备了二氧化钛（TiO_2）、钛酸钡（BaTiO_3）和掺铟氧化锡（ITO）纳米粒子，证明了LPSP法制备纳米粒子的能力。我们成功地用LPSP方法合成了镍、氧化镍和掺杂的荧光粉材料（Y_2O_3:Eu^<3+>）。设计了火焰喷雾热解法制备纳米颗粒的方法。FSP法制备了亚微米级和纳米级红色发光粒子（Y_2O_3:Eu^<3+>）和钛酸锶（SrTiO_3:Pr^<3+>,Al^<3+>）。采用该方法，所有颗粒均直接制备，无需任何后处理。研究了超声雾化器和双液喷嘴两种雾化方式对颗粒特性的影响。我们还开发了生产含有有序孔隙的粉末和薄膜的方法。采用喷雾干燥法制备了直径为亚微米的有序多孔粉体。孔隙呈六边形排列，表明溶剂蒸发过程中自发发生了自组织过程。我们成功地合成了二氧化硅、氧化铝、二氧化钛多孔粉末和FePt多孔膜。