Premium
Preparation, Characterization, and Photocatalytic Properties of CaNb 2 O 6 Nanoparticles
Author(s) -
Cho InSun,
Bae Shin Tae,
Yim Dong Kyun,
Kim Dong Wan,
Hong Kug Sun
Publication year - 2009
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2008.02894.x
Subject(s) - photocatalysis , materials science , photoluminescence , raman spectroscopy , spectroscopy , diffractometer , scanning electron microscope , nanoparticle , diffuse reflectance infrared fourier transform , field emission microscopy , transmission electron microscopy , analytical chemistry (journal) , absorption (acoustics) , absorption spectroscopy , bet theory , x ray photoelectron spectroscopy , specific surface area , nuclear chemistry , chemical engineering , nanotechnology , optoelectronics , chemistry , optics , composite material , catalysis , organic chemistry , engineering , physics , quantum mechanics , diffraction
CaNb 2 O 6 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 H 2 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.