Preparation, Characterization, and Photocatalytic Properties of CaNb2O6 Nanoparticles
CaNb2O6 nanoparticles with a size range of 30–50 nm were synthesized by heat treatment at 600°C after a solvothermal process and their optical and photocatalytic properties were investigated. The prepared powders were characterized by X‐ray powder diffractometer, field‐emission scanning electron mic...
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Published in | Journal of the American Ceramic Society Vol. 92; no. 2; pp. 506 - 510 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
Malden, USA
Blackwell Publishing Inc
01.02.2009
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Online Access | Get full text |
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Summary: | CaNb2O6 nanoparticles with a size range of 30–50 nm were synthesized by heat treatment at 600°C after a solvothermal process and their optical and photocatalytic properties were investigated. The prepared powders were characterized by X‐ray powder diffractometer, field‐emission scanning electron microscope, transmission electron microscope, UV‐Vis diffuse reflectance spectroscopy, Fluorescence spectroscopy, and Raman spectroscopy. Compared with a powder of the same material prepared by a solid‐state reaction (SS) method, the nanoparticles exhibited a higher Brunauer–Emmett–Teller (BET) surface area, more efficient light absorption, and enhanced photocatalytic activity for producing H2 from pure water under UV irradiation. The photoluminescence spectra revealed that a radiative recombination process is dominant in the powder prepared by the SS method (strong blue emission at 300 K) under UV light irradiation, while no obvious emission was observed in the nanoparticles. This decrease of the radiative recombination as well as the higher optical absorption ability and higher BET surface area resulting from the reduced dimensionality led to enhanced photocatalytic activity of the nanoparticles. |
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Bibliography: | ark:/67375/WNG-ZL3XX6VJ-0 ArticleID:JACE02894 istex:BEA65C56C2202D49A7BFAE2F7E1801A0542A8422 This research was supported by a grant from the Fundamental R&D Program for Core Technology of Materials funded by the Ministry of Commerce, Industry and Energy, Republic of Korea (RIAM). T. M. Gur—contributing editor ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 |
ISSN: | 0002-7820 1551-2916 |
DOI: | 10.1111/j.1551-2916.2008.02894.x |