Preparation of nanoporous titania spherical nanoparticles

被引:10
作者
Shiba, Kota [1 ]
Sato, Soh [1 ]
Matsushita, Takayuki [1 ]
Ogawa, Makoto [1 ,2 ]
机构
[1] Waseda Univ, Grad Sch Creat Sci & Engn, Shinjuku Ku, Tokyo 1698050, Japan
[2] Waseda Univ, Dept Earth Sci, Shinjuku Ku, Tokyo 1698050, Japan
关键词
Inorganic-organic hybrid; Nanoporous; Phase transition; Titania; Monodispersed; Spherical; MESOPOROUS SILICA SPHERES; SURFACE-AREA; SEMICONDUCTOR CLUSTERS; PARTICLE-SIZE; STOBER METHOD; TIO2; OXIDE; REACTIVITY; MORPHOLOGY; COMPLEX;
D O I
10.1016/j.jssc.2012.12.024
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
Preparation of nanoporous titania particles from well-defined titania-octadecylamine (titania-ODA) hybrid spherical particles with 450 nm in size, which were prepared by the method reported previously (Chem. Commun., 2009, pp. 6851-6853 [39]; RSC Adv., 2012, vol. 2, pp. 1343-1349 [40]), was studied. ODA was removed by solvent extraction with acidic ethanol to obtain nanoporous titania particles and subsequent calcination led to the formation of nanoporous titania particles with the nanopore size ranging from 2 to 4 nm depending on the calcination temperature. The as-synthesized titania was amorphous and was transformed into anatase (at around 300 degrees C) and rutile (at around 600 degrees C) by the heat treatment. The phase transition behavior was discussed in comparison with that of as-synthesized titania-ODA particles without ODA removal. Spherical particles of titania-ODA hybrids with 70 nm in size were also transformed into nanoporous titania particles composed of anatase crystallites by the washing and calcination at 500 degrees C for 1 h. (C) 2013 Elsevier Inc. All rights reserved.
引用
收藏
页码:317 / 325
页数:9
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