ATTENZIONE! IL REPOSITORY E’ APERTO ESCLUSIVAMENTE ALL’IMMISSIONE DEI RAPPORTI TECNICI (COLLEZIONE 4.01). NON E’ POSSIBILE INSERIRE PRODOTTI IN TUTTE LE ALTRE COLLEZIONI, A CAUSA DI PROBLEMI TECNICI. THE REPOSITORY IS OPEN EXCLUSIVELY FOR THE SUBMISSION OF TECHNICAL REPORTS (COLLECTION 4.01). SUBMISSIONS TO ALL OTHER COLLECTIONS ARE TEMPORARILY UNAVAILABLE, DUE TO TECHNICAL ISSUES.
 

Comparative study of different functionalized graphene-nanoplatelet aqueous nanofluids for solar energy applications

Journal
Date Issued
2019
Author(s)
Vallejo, Javier P.
•
Mercatelli, Luca
•
Martina, Maria Raffaella
•
Di Rosa, Daniele
•
•
Lugo, Luis
•
Sani, Elisa
DOI
Abstract
The optical properties of nanofluids are peculiar and interesting for a variety of applications. Among them, the high light extinction coefficient of nanofluids can be useful in linear parabolic concentrating solar systems, while their properties under high light irradiation intensities can be exploited for direct solar steam generation. The optical characterization of colloids, including the study of non-linear optical properties, is thus a needed step to design the use of such novel materials for solar energy exploitation. In this work, we analysed two different types of nanofluids, consisting of polycarboxylate chemically modified graphene nanoplatelets (P-GnP) and sulfonic acid-functionalized graphene nanoplatelets (S-GnP) dispersed in water, at three concentrations from 0.005 wt% to 0.05 wt%. Moderately stable nanofluids were achieved with favourable light extinction properties, as well as a non-linear optical behaviour under high input solar intensities.
Volume
141
Start page
791
Uri
Url
Issn Identifier
0960-1481
Rights
open.access
File(s)
Loading...
Thumbnail Image
Name

Vallejo_2019_RE_Optical_profile_PGnP_SGnP_Water.pdf

Description
[Administrators only]
Size

4.33 MB

Format

Adobe PDF

Checksum (MD5)

d68bdc9484a2989812f53bfddeb9b64e

Loading...
Thumbnail Image
Name

2019_Renew_En.pdf

Description
preprint
Size

1.54 MB

Format

Adobe PDF

Checksum (MD5)

bb23239e29301d57408d847b7aa22c1d