ResearchSpace

Preparation and characterization of carbon/nickel oxide nanocomposite coatings for solar absorber applications

Show simple item record

dc.contributor.author Roro, Kittessa T
dc.contributor.author Tile, N
dc.contributor.author Forbes, A
dc.date.accessioned 2012-07-30T08:17:31Z
dc.date.available 2012-07-30T08:17:31Z
dc.date.issued 2012-04
dc.identifier.citation Roro, KT, Tile, N and Forbes, A. 2012. Preparation and characterization of carbon/nickel oxide nanocomposite coatings for solar absorber applications. Applied Surface Science, vol. 258(18), pp 7174-7180 en_US
dc.identifier.issn 0169-4332
dc.identifier.uri http://www.sciencedirect.com/science/article/pii/S016943321200671X
dc.identifier.uri http://hdl.handle.net/10204/6019
dc.description Copyright: 2012 Elsevier. This is an ABSTRACT ONLY. en_US
dc.description.abstract Nanocomposite materials have wide range of applications in solar energy conversion. In this work, C/NiO nanocomposite solar energy absorbing surfaces were prepared using sol-gel synthesis and deposited on aluminium substrates using a spin coater. The coatings were prepared from alcoholic sols based on Ni-acetate using diethalonamine as a chelating agent and polyethylene glycol (PEG) as organic template. Sucrose was used as a carbon source. Sols with different heating temperature and PEG concentrations were fabricated. Thermal analysis on the gel revealed that the xerogels weight loss stabilized at around 430 °C. It was found that the absorption edge shifts to the higher wavelength with an increase in the heating temperature in the temperature range studied, 300-550 °C, due to an increase in carbon content in the material. The main features of Raman spectra obtained from the composite films are the D and G bands, characteristic of graphitic carbon films. The G peak width narrowed while the ratio of the integrated intensities of the D and G peaks, ID/IG, increased with the heating temperature, suggesting a progressive increase of the graphitic domain within the films. The solar absorption property of the films was enhanced with the increase of PEG concentrations in the sols from 0 to 2 g and decreases with further increase of PEG. The best solar absorption, asol, and the surface thermal emittance, etherm, at 100 °C obtained were 85% and 5% for a single layer, respectively, yielding an optical selectivity S = asol/etherm of 17.1 en_US
dc.language.iso en en_US
dc.publisher Elsevier en_US
dc.relation.ispartofseries Workflow;9189
dc.subject Thin films en_US
dc.subject Sol-gel preparation en_US
dc.subject Selective surfaces en_US
dc.subject Nanocomposites en_US
dc.subject Nanocomposite materials en_US
dc.title Preparation and characterization of carbon/nickel oxide nanocomposite coatings for solar absorber applications en_US
dc.type Article en_US
dc.identifier.apacitation Roro, K. T., Tile, N., & Forbes, A. (2012). Preparation and characterization of carbon/nickel oxide nanocomposite coatings for solar absorber applications. http://hdl.handle.net/10204/6019 en_ZA
dc.identifier.chicagocitation Roro, Kittessa T, N Tile, and A Forbes "Preparation and characterization of carbon/nickel oxide nanocomposite coatings for solar absorber applications." (2012) http://hdl.handle.net/10204/6019 en_ZA
dc.identifier.vancouvercitation Roro KT, Tile N, Forbes A. Preparation and characterization of carbon/nickel oxide nanocomposite coatings for solar absorber applications. 2012; http://hdl.handle.net/10204/6019. en_ZA
dc.identifier.ris TY - Article AU - Roro, Kittessa T AU - Tile, N AU - Forbes, A AB - Nanocomposite materials have wide range of applications in solar energy conversion. In this work, C/NiO nanocomposite solar energy absorbing surfaces were prepared using sol-gel synthesis and deposited on aluminium substrates using a spin coater. The coatings were prepared from alcoholic sols based on Ni-acetate using diethalonamine as a chelating agent and polyethylene glycol (PEG) as organic template. Sucrose was used as a carbon source. Sols with different heating temperature and PEG concentrations were fabricated. Thermal analysis on the gel revealed that the xerogels weight loss stabilized at around 430 °C. It was found that the absorption edge shifts to the higher wavelength with an increase in the heating temperature in the temperature range studied, 300-550 °C, due to an increase in carbon content in the material. The main features of Raman spectra obtained from the composite films are the D and G bands, characteristic of graphitic carbon films. The G peak width narrowed while the ratio of the integrated intensities of the D and G peaks, ID/IG, increased with the heating temperature, suggesting a progressive increase of the graphitic domain within the films. The solar absorption property of the films was enhanced with the increase of PEG concentrations in the sols from 0 to 2 g and decreases with further increase of PEG. The best solar absorption, asol, and the surface thermal emittance, etherm, at 100 °C obtained were 85% and 5% for a single layer, respectively, yielding an optical selectivity S = asol/etherm of 17.1 DA - 2012-04 DB - ResearchSpace DP - CSIR KW - Thin films KW - Sol-gel preparation KW - Selective surfaces KW - Nanocomposites KW - Nanocomposite materials LK - https://researchspace.csir.co.za PY - 2012 SM - 0169-4332 T1 - Preparation and characterization of carbon/nickel oxide nanocomposite coatings for solar absorber applications TI - Preparation and characterization of carbon/nickel oxide nanocomposite coatings for solar absorber applications UR - http://hdl.handle.net/10204/6019 ER - en_ZA


Files in this item

This item appears in the following Collection(s)

Show simple item record