Spectrally selective single layered Ag@CuO nanocermet coatings for photothermal application: Green synthesis method

Welegergs, G. G.; Gebretinsae, H.G.; Tsegay, M.G.; Mathur, S.; Kebede, T.G.; Nuru, Z.Y.; Dube, Simiso; Mâaza, M.

doi:10.1016/j.optmat.2022.113247

Cited by 13 publications

(3 citation statements)

References 52 publications

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“…Solar absorptance (α) and selectivity (ξ) of the selective absorber coatings were determined using the Equations (1) and (2), respectively [33,34]

\vcenter{\openup.5em\halign{$\displaystyle{#}$\cr {\rm { Absorptance\ }}\left(\alpha \right)={{\mathop{\mathop{\int }\limits^{2.0\mu m}}\limits_{0.3\mu m}{I}_{sol}\left(\lambda \right)(1-R(\lambda \left)\right)d\lambda }\over{\mathop{\mathop{\int }\limits^{2.0\mu m}}\limits_{0.3\mu m}{I}_{sol}\left(\lambda \right)d\lambda }}\hfill\cr}}

…”

Section: Methodsmentioning

confidence: 99%

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Solar to Thermal Energy Conversion Potential of Carbon Nanotubes Modified Copper Oxide Nanocomposite Thin Film Solar Selective Absorbers

Vinayagar,

Karthick Kumar,

Almansour

et al. 2024

ChemistrySelect

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Carbon nanotubes modified copper oxide nanocomposite (CNTs–CuO NC) selective absorbers were prepared through a sol‐gel method by varying weight percentage of CNTs and coated on aluminum (Al) substrates using a dip coating technique to form thin films (TFs). The surface morphology of CNTs–CuO NC TF examined by scanning electron microscopy disclosed linear arrangement of CNTs–CuO NC TF with average particle diameter of 200±30 nm. The X‐ray diffractometer analysis of the CNTs–CuO NC TF revealed the presence of CuO in monoclinic crystal structure. Moreover, the X‐ray diffractometer analysis disclosed good crystalline quality of the CNTs–CuO NC TF and average crystallite size of the CuO and CNTs–CuO NC TF was found to be 69.38 and 85.94 nm, respectively. The energy dispersive X‐ray spectrum of CNTs–CuO NC TF ascertained the presence of Cu, O and C elements with atomic weight proportion of 71.07, 21.61 and 7.32 %, respectively. The functional groups investigation by FTIR spectroscopy exhibited distinct spectral features of CNTs and the peaks observed at 516.78 and 588.70 cm−1 correspond to the characteristic vibrations of metal‐oxygen (M−O) bond that indicates the presence of CuO in the hybrid CNTs‐CuO NC TF. The optical property of the CNTs–CuO NC TF with CNTs weight proportion of 0.5 % inspected through UV‐Vis‐NIR spectroscopy exhibited high solar absorptance and thermal emittance values of 85.9 and 4.3 %, respectively. The observed highest solar selectivity value of 19.98 suggests that the CNTs–CuO NC TF coating can be apparently used as solar selective absorber.

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“…Solar absorptance (α) and selectivity (ξ) of the selective absorber coatings were determined using the Equations (1) and (2), respectively [33,34]

\vcenter{\openup.5em\halign{$\displaystyle{#}$\cr {\rm { Absorptance\ }}\left(\alpha \right)={{\mathop{\mathop{\int }\limits^{2.0\mu m}}\limits_{0.3\mu m}{I}_{sol}\left(\lambda \right)(1-R(\lambda \left)\right)d\lambda }\over{\mathop{\mathop{\int }\limits^{2.0\mu m}}\limits_{0.3\mu m}{I}_{sol}\left(\lambda \right)d\lambda }}\hfill\cr}}

…”

Section: Methodsmentioning

confidence: 99%

“…Solar absorptance (α) and selectivity (ξ) of the selective absorber coatings were determined using the Equations ( 1) and (2), respectively. [33,34]…”

Section: Characterization Techniquesmentioning

confidence: 99%

Solar to Thermal Energy Conversion Potential of Carbon Nanotubes Modified Copper Oxide Nanocomposite Thin Film Solar Selective Absorbers

Vinayagar,

Karthick Kumar,

Almansour

et al. 2024

ChemistrySelect

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“…Photothermal nanomaterials are classified into organic polymer materials (PANI, − PPy, − etc. ), metal nanomaterials (Cu, , Au, , etc. ), carbon-based materials (CNT, − CB, , etc.…”

Section: Introductionmentioning

confidence: 99%

Hanging Photothermal Fabric Based on Polyaniline/Carbon Nanotubes for Efficient Solar Water Evaporation

Wang,

Lin,

et al. 2023

ACS Omega

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Solar-driven water evaporation is essential to provide sustainable and ecofriendly sources of fresh water. However, there are still great challenges in preparing materials with broadband light absorption for high photothermal efficiency as well as in designing devices with large evaporation areas and small heat dissipation areas to boost the water evaporation rate. We designed a hanging-mode solar evaporator based on the polyaniline/carbon nanotube (PANI/CNT) fabric, in which the photothermal fabric acts as the solar evaporator and the micropores on the cotton fabric act as the water transfer channels. The hanging mode provides efficient evaporation at both interfaces by greatly reducing the heat dissipation area. The hanging mode PANI/CNT fabric solar evaporator can achieve an evaporation rate of 2.81 kg•m −2 •h −1 and a photothermal efficiency of 91.74% under a solar illumination of 1 kW•m −2 . This high-performance evaporator is designed by regulating the photothermal material and evaporation device, which provides a novel strategy for sustainable desalination.

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Solar Selectivity of Silver Nanoparticles Modified Copper Oxide Nanocomposite Thin Films Prepared by Facile Chemical Oxidation Method

Vijay Arasu,

Suresh,

Kathiresan

et al. 2024

ChemistrySelect

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Silver nanoparticles modified copper oxide nanocomposite thin films (Ag‐CuO NC TFs) and pristine CuO TF were successfully synthesized on copper substrates using a chemical oxidation route. X‐ray diffractometry (XRD) characterization of Ag‐CuO NC TFs revealed the formation of monoclinic crystal structured CuO. Scanning electron microscopy (SEM) images showed a star‐like grain morphology of the Ag‐CuO NC TFs. Energy dispersive X‐ray spectroscopy (EDX) analysis ascertained the presence of anticipated elements without impurities. Fourier transform infrared spectroscopy (FTIR) investigation confirmed the presence of Ag NPs on CuO in the Ag‐CuO NC TFs. Raman spectroscopy examination indicated the presence of a spinel structure with vibrational and tetrahedral sites. UV‐Vis‐NIR reflectance analysis demonstrated that Ag‐CuO NC TFs with 2.0 wt.% Ag NPs exhibited solar absorptance of 72.39 %, thermal emittance of 4.3 %, and a highest solar selectivity of 16.83 among the prepared thin films. These results suggest that the Ag‐CuO NC TFs could be promising candidates for use as solar selective absorbers in solar thermal energy conversion devices.

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Spectrally selective single layered Ag@CuO nanocermet coatings for photothermal application: Green synthesis method

Cited by 13 publications

References 52 publications

Solar to Thermal Energy Conversion Potential of Carbon Nanotubes Modified Copper Oxide Nanocomposite Thin Film Solar Selective Absorbers

Solar to Thermal Energy Conversion Potential of Carbon Nanotubes Modified Copper Oxide Nanocomposite Thin Film Solar Selective Absorbers

Hanging Photothermal Fabric Based on Polyaniline/Carbon Nanotubes for Efficient Solar Water Evaporation

Solar Selectivity of Silver Nanoparticles Modified Copper Oxide Nanocomposite Thin Films Prepared by Facile Chemical Oxidation Method

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