期刊
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
卷 31, 期 14, 页码 2699-2705出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2011.03.026
关键词
Barium zirconate; Base-hot-water treatment; Photocatalytic activity; Precursors-organic; Powders-chemical preparation
Barium zirconate (BaZrO3) nanoparticles have been prepared by modified sol gel route. Low temperature process of base-hot-water treatment (BHWT) was conducted to obtain high surface area BaZrO3. The treatments were carried out at 90 degrees C and at pH 14 with various concentrations of NaOH solution. Single phase nanocrystalline perovskite structure of BaZrO3 powders was successfully obtained by immersing the BaZrO3 precursor into hot-basic condition of 1 M NaOH solution for 1 h and consecutively calcined at 1000 degrees C for 2 h. BaZrO3 powders with BHWT showed surface area of 18.4 m(2)/g which is nearly 8 times larger than those of the powders without BHWT. Photocatalytic activities of BaZrO3 powders upon bleaching of methylene blue in an aqueous solution under UV light irradiation were enhanced by the increment of their surface area. (C) 2011 Elsevier Ltd. All rights reserved.
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