![]() The operational simplicity of the dip-coating system indicated that it could be extended for coating of other mixed metal oxides as well. The optimal coating with α = 83.4% was produced using 0.25 M copper acetate and 0.25 M cobalt chloride (Cu/Co ratio = 1) with dip-speed 120 mm/min (four cycles). In order to optimize the solar absorptance of the coatings, relevant parameters such as concentrations of cobalt and copper, copper/cobalt concentration ratios and dip-speed were investigated. Synchrotron radiation X-ray photoelectron spectroscopy was employed to analyze the electronic structure of the coated surface showing that the (i) oxygen consisted of lattice, surface and subsurface oxygen, (ii) copper consisted of octahedral and tetrahedral Cu +, as well as octahedral and paramagnetic Cu 2+ oxidation states, and (iii) cobalt consisted of tetrahedral and paramagnetic Co(II), octahedral Co(III) as well as mixed Co(II,III) oxidation states. Field emission scanning electron microscopy was used to characterize the surface morphology of the coating whereby nano-size, grain-like morphology was observed. The optimum absorptance in the range of solar radiation is needed for further optimum design of this material for selective solar absorber application. Cu2CoO3 (y = 2/3) and the mineral guggenite (Cu2MgO3) is discussed.Copper-cobalt oxides thin films had been successfully coated on reflective aluminium substrates via a facile sol-gel dip-coating method for solar absorptance study. ![]() and by microscopic observations on quenched samples as well as on samples at high temps. The positions of the phase boundaries and the phase transitions were further investigated by D.T.A. The O content of most of the quenched samples consisting of a single phase was slightly higher than that given by the above formulas. The progress of reactions between copper, cobalt and iron in copper oxide ore and sulphuric acid under different reaction conditions was studied. phase, the phase Cu2O, and the phase CuO. x-ray analyses, the occurrence of the following phases was established: a cubic spinel phase CuxCo3-xO4 (0 ? x ? 0.3) a cubic rock-salt phase Cu圜o1-yO (0 ? y ? 0.39), a phase Cu圜o1-yO (0.63 ? y ? 0.68) with a specific structure, a liq. From x-ray analyses of quenched samples and from high-temp. Cu2CoO3 (y = 2/3) and the mineral guggenite (Cu2MgO3) is discussed.ĪB - A phase diagram is proposed for the system Co oxide/Cu oxide showing the phases which are stable in air at 600-1200 Deg. and by microscopic observations on quenched samples as well as on samples at high temps. Asymmetric supercapacitor based on carbon nanofibers as the anode and two-dimensional copper cobalt oxide nanosheets as the cathode. The O content of most of the quenched samples consisting of a single phase was slightly higher than that given by the above formulas. phase, the phase Cu2O, and the phase CuO. The configuration of an AEMWE single cell, composed of an etched coppercobalt oxide anode (eCCO) by a simple chemical etching and a polycarbazole-based anion exchange membrane (QPC-TMA) was. These bio-chemical compounds act as an encapsulating agent and reduce copper and cobalt hydroxide which are generated after reaction between metal precursor with hydroxyl anion generated by water to form copper oxide and cobalt oxide nanocomposites (Nagajyothi et. fulica contains number of proteins, amino acids, carbohydrates, etc. x-ray analyses, the occurrence of the following phases was established: a cubic spinel phase CuxCo3-xO4 (0 ? x ? 0.3) a cubic rock-salt phase Cu圜o1-yO (0 ? y ? 0.39), a phase Cu圜o1-yO (0.63 ? y ? 0.68) with a specific structure, a liq. Characterization of SM-CuO and SM-Co 3 O 4 NCs. The characterizations of tri-composite and coating fabrics were investigated by SEM, XRD, TGA and other characterizations. From x-ray analyses of quenched samples and from high-temp. A copper cobalt nickel ferrite/graphene oxide/polyaniline tri-composite was prepared by a two-step method. N2 - A phase diagram is proposed for the system Co oxide/Cu oxide showing the phases which are stable in air at 600-1200 Deg. To surface oxidation (NiO) of the Ni foam (0.7 cm × 0.7 cm) substrate, etching with HCl (5 M) for 30 min was carried out, and the residual acid was removed from the substrate by washing with deionized (DI) water 30,31. T1 - Phase equilibria in the system cobalt oxide-copper oxide in air Preparation of CopperCobalt Oxide Electrodes by Cathodic Electrodeposition.
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |