RT journal article
T1 WSe2 nanosheets synthesized by a solvothermal process as advanced nanofluids for thermal solar energy
A1 Martínez Merino, Paloma
A1 Sani, Elisa
A1 Mercatelli, Luca
A1 Alcántara Puerto, Rodrigo
A1 Navas Pineda, Francisco Javier
A2 Química Física
AB Nanofluids are colloidal systems based on the suspension of nanoparticlesin a fluid. Their thermal properties mean that they are promising heat transfer fluids withpossible applications in different fields, concentrating solar energy being one of particularinterest. Thus, this study presents the preparation of nanofluids based on WSe2nanoparticles suspended in the eutectic mixture of biphenyl and diphenyl oxide, whichis a heat transfer fluid widely used in concentrating solar power plants. To this end,solvothermal synthesis was used to prepare WSe2 nanosheets, which were characterizedby means of scanning transmission electron microscopy, X-ray diffraction, X-rayphotoelectron spectroscopy, and Raman spectroscopy. The physical and chemicalstability of the nanofluids was analyzed, observing that they became more stable when Triton X-100 was used as the surfactant. The presence of WSe2 nanosheets did not result in a significant increase in density or viscosity, but, by contrast, improvements were obtained in their isobaric specific heat and thermal conductivity, up to 4.7 and 64%, respectively. Spectral optical properties were investigated as well, showing a significant effect of the WSe2 nanosheet addition to the extinction coefficient of the base fluid in the wavelength range of the solar spectrum, promising for direct absorption solar collectors. Finally, the efficiency of the nanofluids was analyzed in a solar collector considering the Ur parameter, obtaining a remarkable increase in the efficiency of up to 34% with respect to the pure heat transfer fluid. This proves the possibility to obtain a sustainable production of energy from the sun using these WSe2-based nanofluids.
PB AMER CHEMICAL SOC
SN 2168-0485
YR 2020
FD 2020
LK http://hdl.handle.net/10498/30297
UL http://hdl.handle.net/10498/30297
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 11-nov-2026