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Indexed by:期刊论文

Date of Publication:2018-01-01

Journal:MATERIALS LETTERS

Included Journals:SCIE、EI

Volume:210

Page Number:35-38

ISSN No.:0167-577X

Key Words:Al2O3; Hollow microspheres; Sacrificial template; Microstructure; Porous materials

Abstract:A novel route to prepare Al2O3 hollow microspheres with a diameter of about 6 mu m is presented by the way of using CaMg(CO3)(2) microspheres as the recyclable sacrifice-template and aqueous solution of Mg (NO3)(2) and Ca(NO3)(2) as dispersant. The dispersant can not only control the reaction rate of ion-exchange to synthesize Al2O3 hollow microspheres, but also act as a reactant to recycle the templates. Moreover, the as-obtained Al2O3 hollow microspheres possessed a surface area of 214.8 m(2) g(-1) and a pore volume of 0.9117 cm(3) g(-1), which are higher than many reported porous Al2O3 materials. These advantages make this route economical and efficient to prepare Al2O3 hollow microspheres, and promising in large-scale preparation of other metal oxides hollow structures. (C) 2017 Elsevier B.V. All rights reserved.