Journal
PHYSICA B-CONDENSED MATTER
Volume 407, Issue 10, Pages 1509-1512Publisher
ELSEVIER
DOI: 10.1016/j.physb.2011.09.073
Keywords
Solar thermal absorbers; Chromium oxide; Aqueous chemical growth
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Funding
- African Laser Center (ALC)
- iThemba LABS-MRD
- Tshwane University of Technology
- CSIR in South Africa
- Abdus Salam ICTP-Trieste, Italy
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Monodisperse spherical core-shell particles of Cr/alpha-Cr2O3 with high adhesion were successfully coated on rough copper substrates by a simple self-assembly-like method for the use in solar thermal absorbers. The structure and morphology of the core-shell particles of Cr/alpha-Cr2O3 were effectively controlled by deposition temperature and the pH of the initial precursor solution. Their characterizations were carried out with X-ray diffraction, scanning electron microscopy, energy dispersive spectrometry and attenuated total reflection, as well as UV-vis diffuse reflectance spectroscopy. The samples aged for more than 40 h at 75 degrees C exhibit the targeted high absorbing optical characteristic Black chrome while those aged for <= 40 h show a significant high UV-vis diffuse reflectance green color. (C) 2011 Elsevier B.V. All rights reserved.
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