Structural Thermal Stability of Graphene Oxide-Doped Copper–Cobalt Oxide Coatings as a Solar Selective Surface

M. Mahbubur Rahman, Zhong Tao Jiang, Chun Yang Yin, Lee Siang Chuah, Hooi Ling Lee, Amun Amri, Bee Min Goh, Barry J. Wood, Chris Creagh, Nicholas Mondinos, Mohmmednoor Altarawneh, Bogdan Z. Dlugogorski

Research output: Contribution to journalArticleResearchpeer-review

Abstract

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 (SR-XRD), 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 CuxCoyOz 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.

Original languageEnglish
Pages (from-to)1179-1191
Number of pages13
JournalJournal of Materials Science and Technology
Volume32
Issue number11
Early online date13 Sep 2016
DOIs
Publication statusPublished - 1 Nov 2016
Externally publishedYes

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Graphite
Oxides
Graphene
Thermodynamic stability
Coatings
Infrared radiation
Synchrotron radiation
Fourier transform infrared spectroscopy
Metals
X ray diffraction
Thin films
Coating techniques
Photoelectrons
Aluminum
Oxide films
Sol-gels
Transition metals
Microscopic examination
Annealing
Heating

Cite this

Rahman, M. Mahbubur ; Jiang, Zhong Tao ; Yin, Chun Yang ; Chuah, Lee Siang ; Lee, Hooi Ling ; Amri, Amun ; Goh, Bee Min ; Wood, Barry J. ; Creagh, Chris ; Mondinos, Nicholas ; Altarawneh, Mohmmednoor ; Dlugogorski, Bogdan Z. / Structural Thermal Stability of Graphene Oxide-Doped Copper–Cobalt Oxide Coatings as a Solar Selective Surface. In: Journal of Materials Science and Technology. 2016 ; Vol. 32, No. 11. pp. 1179-1191.
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title = "Structural Thermal Stability of Graphene Oxide-Doped Copper–Cobalt Oxide Coatings as a Solar Selective Surface",
abstract = "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 (SR-XRD), 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 CuxCoyOz 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.",
keywords = "Coatings, Fourier transform infrared spectroscopy, Sol-gel method, Synchrotron radiation, X-ray diffraction, X-ray photoelectron spectroscopy",
author = "Rahman, {M. Mahbubur} and Jiang, {Zhong Tao} and Yin, {Chun Yang} and Chuah, {Lee Siang} and Lee, {Hooi Ling} and Amun Amri and Goh, {Bee Min} and Wood, {Barry J.} and Chris Creagh and Nicholas Mondinos and Mohmmednoor Altarawneh and Dlugogorski, {Bogdan Z.}",
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Rahman, MM, Jiang, ZT, Yin, CY, Chuah, LS, Lee, HL, Amri, A, Goh, BM, Wood, BJ, Creagh, C, Mondinos, N, Altarawneh, M & Dlugogorski, BZ 2016, 'Structural Thermal Stability of Graphene Oxide-Doped Copper–Cobalt Oxide Coatings as a Solar Selective Surface', Journal of Materials Science and Technology, vol. 32, no. 11, pp. 1179-1191. https://doi.org/10.1016/j.jmst.2016.09.002

Structural Thermal Stability of Graphene Oxide-Doped Copper–Cobalt Oxide Coatings as a Solar Selective Surface. / Rahman, M. Mahbubur; Jiang, Zhong Tao; Yin, Chun Yang; Chuah, Lee Siang; Lee, Hooi Ling; Amri, Amun; Goh, Bee Min; Wood, Barry J.; Creagh, Chris; Mondinos, Nicholas; Altarawneh, Mohmmednoor; Dlugogorski, Bogdan Z.

In: Journal of Materials Science and Technology, Vol. 32, No. 11, 01.11.2016, p. 1179-1191.

Research output: Contribution to journalArticleResearchpeer-review

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T1 - Structural Thermal Stability of Graphene Oxide-Doped Copper–Cobalt Oxide Coatings as a Solar Selective Surface

AU - Rahman, M. Mahbubur

AU - Jiang, Zhong Tao

AU - Yin, Chun Yang

AU - Chuah, Lee Siang

AU - Lee, Hooi Ling

AU - Amri, Amun

AU - Goh, Bee Min

AU - Wood, Barry J.

AU - Creagh, Chris

AU - Mondinos, Nicholas

AU - Altarawneh, Mohmmednoor

AU - Dlugogorski, Bogdan Z.

PY - 2016/11/1

Y1 - 2016/11/1

N2 - 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 (SR-XRD), 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 CuxCoyOz 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.

AB - 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 (SR-XRD), 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 CuxCoyOz 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.

KW - Coatings

KW - Fourier transform infrared spectroscopy

KW - Sol-gel method

KW - Synchrotron radiation

KW - X-ray diffraction

KW - X-ray photoelectron spectroscopy

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JO - Journal of Materials Science and Technology

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SN - 1005-0302

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