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Absorption and scattering properties of carbon nanohorn-based nanofluids for direct sunlight absorbers.

Mercatelli L, Sani E, Zaccanti G, Martelli F, Di Ninni P, Barison S, Pagura C, Agresti F, Jafrancesco D - Nanoscale Res Lett (2011)

Bottom Line: Scattered light was found to be not more than about 5% with respect to the total attenuation of light.Both these effects, together with the possible chemical functionalization of carbon nanohorns, make this new kind of nanofluids very interesting for increasing the overall efficiency of the sunlight exploiting device.PACS: 78.40.Ri, 78.35.+c, 78.67.Bf, 88.40.fh, 88.40.fr, 81.05.U.

View Article: PubMed Central - HTML - PubMed

Affiliation: National Institute of Optics, National Council of Research, Firenze, 50125, Italy. elisa.sani@ino.it.

ABSTRACT
In the present work, we investigated the scattering and spectrally resolved absorption properties of nanofluids consisting in aqueous and glycol suspensions of single-wall carbon nanohorns. The characteristics of these nanofluids were evaluated in view of their use as sunlight absorber fluids in a solar device. The observed nanoparticle-induced differences in optical properties appeared promising, leading to a considerably higher sunlight absorption with respect to the pure base fluids. Scattered light was found to be not more than about 5% with respect to the total attenuation of light. Both these effects, together with the possible chemical functionalization of carbon nanohorns, make this new kind of nanofluids very interesting for increasing the overall efficiency of the sunlight exploiting device. PACS: 78.40.Ri, 78.35.+c, 78.67.Bf, 88.40.fh, 88.40.fr, 81.05.U.

No MeSH data available.


Related in: MedlinePlus

Transmittance spectra of water and glycol-based nanofluids with the same SWCNH concentrations (0.005 g/L for G1 and A1 and 0.05 g/L for G4 and A4). Spectra of the pure base fluids are shown for comparison (G0 and A0).
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Figure 3: Transmittance spectra of water and glycol-based nanofluids with the same SWCNH concentrations (0.005 g/L for G1 and A1 and 0.05 g/L for G4 and A4). Spectra of the pure base fluids are shown for comparison (G0 and A0).

Mentions: The acquired transmittance spectra were corrected for the reflectance term. In Figure 3 we show the comparison of some transmittance spectra of pure fluids and nanofluids of both kinds with the same SWCNH concentrations.


Absorption and scattering properties of carbon nanohorn-based nanofluids for direct sunlight absorbers.

Mercatelli L, Sani E, Zaccanti G, Martelli F, Di Ninni P, Barison S, Pagura C, Agresti F, Jafrancesco D - Nanoscale Res Lett (2011)

Transmittance spectra of water and glycol-based nanofluids with the same SWCNH concentrations (0.005 g/L for G1 and A1 and 0.05 g/L for G4 and A4). Spectra of the pure base fluids are shown for comparison (G0 and A0).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3211347&req=5

Figure 3: Transmittance spectra of water and glycol-based nanofluids with the same SWCNH concentrations (0.005 g/L for G1 and A1 and 0.05 g/L for G4 and A4). Spectra of the pure base fluids are shown for comparison (G0 and A0).
Mentions: The acquired transmittance spectra were corrected for the reflectance term. In Figure 3 we show the comparison of some transmittance spectra of pure fluids and nanofluids of both kinds with the same SWCNH concentrations.

Bottom Line: Scattered light was found to be not more than about 5% with respect to the total attenuation of light.Both these effects, together with the possible chemical functionalization of carbon nanohorns, make this new kind of nanofluids very interesting for increasing the overall efficiency of the sunlight exploiting device.PACS: 78.40.Ri, 78.35.+c, 78.67.Bf, 88.40.fh, 88.40.fr, 81.05.U.

View Article: PubMed Central - HTML - PubMed

Affiliation: National Institute of Optics, National Council of Research, Firenze, 50125, Italy. elisa.sani@ino.it.

ABSTRACT
In the present work, we investigated the scattering and spectrally resolved absorption properties of nanofluids consisting in aqueous and glycol suspensions of single-wall carbon nanohorns. The characteristics of these nanofluids were evaluated in view of their use as sunlight absorber fluids in a solar device. The observed nanoparticle-induced differences in optical properties appeared promising, leading to a considerably higher sunlight absorption with respect to the pure base fluids. Scattered light was found to be not more than about 5% with respect to the total attenuation of light. Both these effects, together with the possible chemical functionalization of carbon nanohorns, make this new kind of nanofluids very interesting for increasing the overall efficiency of the sunlight exploiting device. PACS: 78.40.Ri, 78.35.+c, 78.67.Bf, 88.40.fh, 88.40.fr, 81.05.U.

No MeSH data available.


Related in: MedlinePlus