Solar absorption and thermal emission properties of multiwall carbon nanotube/nickel oxide nanocomposite thin films synthesized by sol–gel process

Roro, Kittessa T; Tile, Ngcali; Mwakikunga, Bonex W.; Yalisi, B; Forbes, Andrew

doi:10.1016/j.mseb.2012.03.017

Cited by 47 publications

(29 citation statements)

References 20 publications

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“…The multiwall carbon nanotubes (MWCNTs) embedded in NiO matrix composite on an aluminum substrate as a solar selective absorber has been synthesized by Roro et al [108]. The synthesis was carried out via sol-gel process using nickel acetate in ethanol solution, chelating agent, chemically functionalized MWCNTs and a structure directing template.…”

Section: Carbon Particles In Dielectric Matricesmentioning

confidence: 99%

Developments in the synthesis of flat plate solar selective absorber materials via sol–gel methods: A review

Amri

Jiang

Pryor

et al. 2014

Renewable and Sustainable Energy Reviews

145

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Section: Carbon Particles In Dielectric Matricesmentioning

confidence: 99%

Developments in the synthesis of flat plate solar selective absorber materials via sol–gel methods: A review

Amri

Jiang

Pryor

et al. 2014

Renewable and Sustainable Energy Reviews

145

View full text Add to dashboard Cite

“…Only Selvakumar et al reported high absorptance of 0.95 and low emittance of 0.2 using CNT‐based tandem absorber fabricated by CVD . Wet deposition processes were also reported; Rincon et al fabricated spectrally selective coatings using CNT‐TiO 2 composite by sol–gel and dipping, but they exhibited low absorptance, Roro et al fabricated functional multi‐walled CNT‐nickel oxide nanocomposite coatings by dip‐coating, yielding absorptance of 0.84 and emittance of 0.2 . From the literature survey, it is evident that most of the CNT‐based coating suffer from low spectral selectivity.…”

Section: Introductionmentioning

confidence: 99%

“…Carbon nanotubes (CNTs) which are the most absorbing material ever produced, seem ideally suited as solar thermal absorbers. [29][30][31][32][33][34][35][36][37][38][39][40][41] Moreover, CNTs exhibit high physical and chemical stability, large surface area, and high thermal conductivity. [42] Indeed, there are a few studied whereby CNTs were used as solar thermal absorbers; however, most of these were formed from the gaseous phase by CVD.…”

Section: Introductionmentioning

confidence: 99%

Highly Selective Solar Thermal Sprayable Coating Based on Carbon Nanotubes

et al. 2017

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A key component in solar thermal energy conversion system is the light collector that is coated with an absorbing material. Optimal performance is accomplished by high absorptance and low emittance. The best collectors are fabricated by vacuum deposition processes, which are limited to small size and flat objects. Here, the formation and performance of a new three‐layer solar selective coating, which is formed by a simple wet‐deposition process is reported. The solar absorbing layer is based on carbon nanotubes, which are considered the most absorbing material. This layer is coated by a second layer of ITO, which functions as an IR reflecting layer, followed by an AlOOH anti‐reflective layer. The resulting CNT/ITO/AlOOH coating exhibited the best‐reported spectral selectivity by wet deposition process, with high absorptance of 0.941 ± 0.004 and low emittance of 0.13 ± 0.02 at room temperature. Furthermore, the multilayer sprayable coating is stable at elevated temperature for a prolong time and therefore, shows promise for application in large scale and on‐site solar thermal facilities.

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“…Unfortunately, VACNT arrays can't be synthesized on any substrates, which greatly limits the applications of VACNT arrays. On the other hands, tangled carbon nanotube films or carbon nanotube composite thin films which can be easily coated on any substrates exhibit higher reflectance and lower absorptivity than VACNT arrays [8,11].…”

Section: Introductionmentioning

confidence: 99%

Enhanced Light Absorptivity of Carbon Nanotube Composite Coatings with Conical Micro-structure

Liu¹,

Yang²,

Li³

et al. 2017

dtetr

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ABSTRACT Black coatings with high light absorptivity are of great importance for many applications. It is concluded that the morphology of the coatings can greatly affect the absorptivity. Here, the influence of the morphology in controlling the light absorptivity of carbon nanotube composite coating has been studied. Carbon nanotube composite films are fabricated by painting carbon nanotube-cyanoacrylate slurry on the substrate. Uniform micro-cones on the surface of the coatings were fabricated by laser irradiation in air. The angles of the microcones obtained could be controlled by changing the energy density of the laser pulses. The spectral absorptivity measurement from 0.25 μm to 2 μm shows that the carbon nanotube composite coatings with such conical micro-structure have enhanced light absorptivity. It is also shown that the conical micro-structure with smaller cone angles exhibited much higher light absorptivity. It is proposed that carbon nanotube composite film being irradiated by laser is a simple and efficient method to fabricate black coatings with high light absorptivity.

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Solar absorption and thermal emission properties of multiwall carbon nanotube/nickel oxide nanocomposite thin films synthesized by sol–gel process

Cited by 47 publications

References 20 publications

Developments in the synthesis of flat plate solar selective absorber materials via sol–gel methods: A review

Developments in the synthesis of flat plate solar selective absorber materials via sol–gel methods: A review

Highly Selective Solar Thermal Sprayable Coating Based on Carbon Nanotubes

Enhanced Light Absorptivity of Carbon Nanotube Composite Coatings with Conical Micro-structure

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