Preparation of oxide particles with ordered macropores by colloidal templating and spray pyrolysis
Preparation of oxide particles with ordered macropores by colloidal templating and spray pyrolysis
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DOI：
10.1016/j.actamat.2004.07.021
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发表时间：
2004-10-04
期刊：
影响因子：
9.4
通讯作者：
Okuyama, K
中科院分区：
文献类型：
--
作者：
Abdullah, M;Iskandar, F;Okuyama, K
二氧化硅，二氧化钛，二氧化铝，二氧化锆，和二氧化钇颗粒含有有序的，六方密堆积结构的大孔，通过喷雾热解。使用氧化物源（亚氮金属）溶液和由聚苯乙烯乳胶（PSL）颗粒组成的胶体的混合物。该方法包括在低温下初始干燥以蒸发溶剂，随后在高温下干燥以允许热解反应发生并分解PSL珠粒。这发生在垂直反应器中，需要大约1-2秒。原则上，该方法可用于生产含有有序孔的各种类型的氧化物颗粒。它允许容易地控制颗粒尺寸、孔尺寸和空间以及颗粒的孔隙率。在紫外光照射下观察粉末材料的布拉格反射。(C)2004 Acta Materialia Inc.由爱思唯尔有限公司出版。保留所有权利。
Silicon dioxide, titanium dioxide, aluminium dioxide, zirconium dioxide, and yttrium dioxide particles containing macropores with ordered, hexagonal closed packing structures were produced by spray pyrolysis. A mixture of a solution of the oxide source (nitrous metal) and a colloid comprised of polystyrene latex (PSL) particles was used. The process involved initial drying at low temperature to evaporate the solvent, followed by drying at high temperature to permit the pyrolysis reaction to occur and to decompose the PSL beads. This takes place in a vertical reactor and requires around 1-2 s. This method can, in principle, be used to produce various types of oxide particles containing ordered pores. It allows easy control of the particle size, pore size and space, and the porosity of particles. Bragg reflection of the powdered material was observed under ultraviolet irradiation. (C) 2004 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.