High surface area BaZrO3 photocatalyst prepared by base-hot-water treatment
| Autor: | Niki Prastomo, Mototsugu Sakai, Go Kawamura, Hiroyuki Muto, Atsunori Matsuda, Nor Hana binti Zakaria |
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| Rok vydání: | 2011 |
| Předmět: |
chemistry.chemical_classification
Aqueous solution Materials science Base (chemistry) Inorganic chemistry Nanoparticle Nanocrystalline material law.invention chemistry.chemical_compound chemistry law Materials Chemistry Ceramics and Composites Photocatalysis Water treatment Calcination Methylene blue Nuclear chemistry |
| Zdroj: | Journal of the European Ceramic Society. 31:2699-2705 |
| ISSN: | 0955-2219 |
| Popis: | Barium zirconate (BaZrO 3 ) 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 BaZrO 3 . The treatments were carried out at 90 °C and at pH 14 with various concentrations of NaOH solution. Single phase nanocrystalline perovskite structure of BaZrO 3 powders was successfully obtained by immersing the BaZrO 3 precursor into hot-basic condition of 1 M NaOH solution for 1 h and consecutively calcined at 1000 °C for 2 h. BaZrO 3 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 BaZrO 3 powders upon bleaching of methylene blue in an aqueous solution under UV light irradiation were enhanced by the increment of their surface area. |
| Databáze: | OpenAIRE |
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