Structural Thermal Stability of Graphene Oxide-Doped Copper–Cobalt Oxide Coatings as a Solar Selective Surface
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2016年第11期
论文作者：M.Mahbubur Rahman Zhong-Tao Jiang Chun-Yang Yin Lee Siang Chuah Hooi-Ling Lee Bee-Min Goh Barry J.Wood Chris Creagh Nicholas Mondinos Mohmmednoor Altarawneh Bogdan Z.Dlugogorski
文章页码：1179 - 1191
摘 要：3d transition metal oxides based thin film coatings such as copper–cobalt oxides exhibit high absorption in the visible region and low emittance in the infrared to far-infrared region of the solar spectrum which is favourable for use as potential selective surface materials in photothermal devices. These materials have the potential to minimize heating while increasing absorption in the operative spectrum range and therefore achieve higher solar selectivity. A series of mixed copper–cobalt metal spinel oxides（CuxCoyOz）doped with graphene oxide thin films were deposited on commercial grade aluminium substrates using a sol-gel dip-coating technique at an annealing temperature of 500 °C in air for 1 h. Characterizations of the synthesized films were carried out by high temperature synchrotron radiation X-ray Diffraction（SRXRD）, UV–Vis, Fourier Transform infrared spectroscopy（FTIR） and X-ray photoelectron microscopy（XPS）techniques. High thermal stability of coatings with multiple phases, binary and ternary metal oxides, was defined through SR-XRD study. FTIR analysis shows moderate（<80%） to high（up to 99%） reflectance in the infrared region while the UV–Vis investigations demonstrate that, in the visible region, solar absorption increases gradually（up to 95%） with the addition of graphene oxide to the Cux Coy Oz coatings.With the incorporation of 1.5 wt.% of graphene oxide to the copper–cobalt oxide coatings, a high solar selectivity of 29.01（the ratio of the average solar absorptance in visible and the average thermal emittance in infrared to far infrared region; α/ε） was achieved.
M.Mahbubur Rahman1，Zhong-Tao Jiang1，Chun-Yang Yin2，Lee Siang Chuah3，Hooi-Ling Lee4，Bee-Min Goh6，Barry J.Wood7，Chris Creagh8，Nicholas Mondinos1，Mohmmednoor Altarawneh8，Bogdan Z.Dlugogorski8
1. Surface Analysis and Materials Engineering Research Group, School of Engineering & Information Technology, Murdoch University2. School of Science & Engineering, Teesside University3. Department of Physics, School of Distance Education, Universiti Sains Malaysia4. Department of Chemistry, School of Chemical Sciences, Universiti Sains Malaysia6. School of Chemistry, Bedson Building, Newcastle University7. School of Chemistry, The University of Queensland8. School of Engineering & Information Technology, Murdoch University
摘 要：3d transition metal oxides based thin film coatings such as copper–cobalt oxides exhibit high absorption in the visible region and low emittance in the infrared to far-infrared region of the solar spectrum which is favourable for use as potential selective surface materials in photothermal devices. These materials have the potential to minimize heating while increasing absorption in the operative spectrum range and therefore achieve higher solar selectivity. A series of mixed copper–cobalt metal spinel oxides（CuxCoyOz）doped with graphene oxide thin films were deposited on commercial grade aluminium substrates using a sol-gel dip-coating technique at an annealing temperature of 500 °C in air for 1 h. Characterizations of the synthesized films were carried out by high temperature synchrotron radiation X-ray Diffraction（SRXRD）, UV–Vis, Fourier Transform infrared spectroscopy（FTIR） and X-ray photoelectron microscopy（XPS）techniques. High thermal stability of coatings with multiple phases, binary and ternary metal oxides, was defined through SR-XRD study. FTIR analysis shows moderate（<80%） to high（up to 99%） reflectance in the infrared region while the UV–Vis investigations demonstrate that, in the visible region, solar absorption increases gradually（up to 95%） with the addition of graphene oxide to the Cux Coy Oz coatings.With the incorporation of 1.5 wt.% of graphene oxide to the copper–cobalt oxide coatings, a high solar selectivity of 29.01（the ratio of the average solar absorptance in visible and the average thermal emittance in infrared to far infrared region; α/ε） was achieved.
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