Journal
APPLIED CATALYSIS A-GENERAL
Volume 455, Issue -, Pages 199-205Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apcata.2013.01.034
Keywords
Photodegradation; Photoactivity; AgBr crystal; Morphology-dependent
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Funding
- National Natural Science Foundation of China [20873169]
- Laboratory of Special Photographic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences (CAS)
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The physicochemical properties of semiconductor catalysts depend intensively on their morphologies. Herein, three typical AgBr catalysts with well-defined spherical, cubic and octahedral shape were synthesized in a large scale through a facile ion exchange procedure controlled by a computerized double-jet apparatus. The as-synthesized monodispersed AgBr crystals were systematically characterized by scanning electron microscopy (SEM), energy dispersive X-ray spectrometer (EDS), powder X-ray diffraction (XRD), and UV-vis diffuse reflection spectra (DRS). To clarify the relationship between photodegradation activities and structures, photodegradation performances of the AgBr crystals were evaluated by the degradation of Rhodamine B (RhB) and methyl orange (MO) aqueous solution under visible-light irradiation. The results demonstrated that the octahedral AgBr crystals exposed with {1 1 1} facets exhibited the highest photodegradation efficiency. Consequently, the present work is going to be instructive to develop the high efficient AgBr and other semiconductor photocatalysts for practical applications in the future. (c) 2013 Elsevier B.V. All rights reserved.
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