Black Cr/alpha-Cr2O3 nanoparticles based solar absorbers

作者：Khamlich S^*; Nemraoui O; Mongwaketsi N; McCrindle R; Cingo N; Maaza M

来源：Physica B: Condensed Matter , 2012, 407(10): 1509-1512.

DOI：10.1016/j.physb.2011.09.073

• Solar thermal absorbers
• Chromium oxide
• Aqueous chemical growth

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".

• 出版日期2012-5-15