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, L. S.; Lee, Hooi Ling; Amri, Amun; Goh, Bee Min; Wood, Barry; Creagh, Christine; Mondinos, Nicholas; Altarawneh, Mohammednoor; Dlugogorski, Bogdan Z.

doi:10.1016/j.jmst.2016.09.002

Cited by 28 publications

(4 citation statements)

References 62 publications

(8 reference statements)

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“…A UV-Vis double beam spectrophotometer with 60 mm integrating sphere (Model: UV-670 UV-Vis spectrophotometer, JASCO, USA) was used to obtain UV-Vis reflectance spectra in the wavelength range from 190 to 2300 nm. For a given wavelength range, the solar absorptance (α) is defined as the weighted fraction between absorbed radiation and incoming solar radiation (Isol) (popularly known as the Beckman-Duffie method) [33][34][35]:…”

Section: Uv-vis Studiesmentioning

confidence: 99%

Structural, morphological, and optical characterizations of Mo, CrN and Mo:CrN sputtered coatings for potential solar selective applications

Khalil

Rahman

Taha

et al. 2018

Applied Surface Science

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Mo, CrN, and Mo:CrN sputtered coatings synthesized onto silicon Si(100) substrates were investigated as solar selective surfaces and their potential applications in optical devices. These coatings were characterized using XRD, SEM, UV-Vis, and FTIR techniques. XRD investigation, showed a change in CrN thin film crystallite characteristic due to Mo doping. Compared to the CrN coating, the Mo:CrN film has a higher lattice parameter and lower grain size of 4.19 nm and 106.18 nm, respectively. FESEM morphology confirmed the decrement in Mo:CrN crystal size due to Mo doping. Optical analysis showed that in the visible range of the solar spectrum, the CrN coatings exhibit the highest solar absorptance of 66% while the lowest thermal emittance value of 5.67 was recorded for the CrN coating doped with Mo. Consequently, the highest solar selectivity of 9.6, and the energy band-gap of 2.88 eV were achieved with the Mo-doped CrN coatings. Various optical coefficients such as optical absorption coefficient, refractive index, extinction coefficient, real and imaginary parts of dielectric constants, and energy loss functions of these coatings were also estimated from the optical reflectance data recorded in the wavelength range of 190-2300 nm.

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Section: Uv-vis Studiesmentioning

confidence: 99%

Structural, morphological, and optical characterizations of Mo, CrN and Mo:CrN sputtered coatings for potential solar selective applications

Khalil

Rahman

Taha

et al. 2018

Applied Surface Science

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“…Industrial SSSs use metal particles based ceramic cermet structures synthesized via vacuum, electroplating, sputtering, and electrochemical procedures [18,19]. Recently we reported our work on copper-cobalt oxide thin film coatings on the top of highly reflective aluminium substrates using a customized, and yet, cost-effective sol−gel dip-coating method [6,20]. The new coatings demonstrated distinct optical properties with promising prospects for solar selective absorber application.…”

Section: Introductionmentioning

confidence: 99%

Structural and optical characteristics of pre- and post-annealed sol-gel derived CoCu-oxide coatings

Miran

Rahman

Jiang

et al. 2017

Journal of Alloys and Compounds

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Sol-gel derived CuCo-oxide coatings as solar selective surfaces, synthesized onto aluminium substrates at various annealing temperatures, are analysed by correlating their structural, chemical bonding states, and surface morphological topographies. As the annealing progressed, all the coatings displayed a Cu 0.56 Co 2.44 O 4 (ICSD 78-2175) phase with preferential orientation along (400) reflection plane. Rietveld refinement of X-ray diffraction (XRD) data indicate that residual stress and microstrains developed around the coating surfaces are reduced resulting in mechanically stable thin films. Enhancement of the crystallite size and preferred orientation of the surface were confirmed via XRD, field emission scanning electron microscopy (FESEM), and atomic force microscopy (AFM) analysis. X-ray photoelectron spectroscopy (XPS) analysis shows tetrahedral, octahedral and mixed states of Cu and Co ions with a stable atomic ratio of Co/Cu, and an increase of O and C contents but no metal-carbon bonding on the surface of materials. Optical reflectance investigations indicated that solar selectivity of the coatings increased from 3.81 to 24 as the annealing temperature reached up to 500 °C.

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“…This band is the only band coming from a normal first-order Raman scattering process in graphene (Malard et al, 2009). The 2D band is the secondorder of zone-boundary phonons (Ferrari et al, 2006) and comes from the inelastic scattering of phonons (Rahman et al, 2016). This band is sensitive to the number of graphene layers (Malard et al, 2009).…”

Section: Raman Spectroscopy and Dft Calculationsmentioning

confidence: 99%

Very-few-layer graphene obtained from facile two-step shear exfoliation in aqueous solution

Amri

Hendri

Yin

et al. 2021

Chemical Engineering Science

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

Abstract: 25(M.M. Rahman).

Cited by 28 publications

References 62 publications

Structural, morphological, and optical characterizations of Mo, CrN and Mo:CrN sputtered coatings for potential solar selective applications

Structural, morphological, and optical characterizations of Mo, CrN and Mo:CrN sputtered coatings for potential solar selective applications

Structural and optical characteristics of pre- and post-annealed sol-gel derived CoCu-oxide coatings

Very-few-layer graphene obtained from facile two-step shear exfoliation in aqueous solution

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