2026-06-01T09:02:16Zhttps://riuma.uma.es/rest/oai/requestoai:riuma.uma.es:10630/261002026-02-03T11:33:38Zcom_10630_2254col_10630_37953
RIUMA. Repositorio Institucional de la Universidad de Málaga
author
Meriem, Jebali
author
Gianpiero, Colangelo
author
Gómez-Merino, Ana Isabel
2023-03-08T07:46:26Z
2023-03-08T07:46:26Z
2023-02-12
Jebali M, Colangelo G, Gómez-Merino AI. Green Synthesis, Characterization, and Empirical Thermal Conductivity Assessment of ZnO Nanofluids for High-Efficiency Heat-Transfer Applications. Materials. 2023; 16(4):1542. https://doi.org/10.3390/ma16041542
https://hdl.handle.net/10630/26100
https://doi.org/10.3390/ma16041542
ZnO nanoparticles were synthesized using lemon juice and zinc nitrate (1:1) through the green method. The structure of the biosynthesized ZnO nanoparticles was analyzed by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and thermogravimetric analysis (TGA). The morphology and the size of ZnO nanoparticles were elucidated by transmission electron microscopy (TEM) and scanning electron microscopy (SEM). The powder was highly dispersed and irregularly shaped and the size of the nanoparticles ranged from 28 to 270 nm, depending on the shape of the particles. Thermal conductivity of the biosynthesized ZnO PG/W mixture 40:60 (v/v) nanofluids was measured within the temperature range of 20–70 °C. Experimental results revealed a linear increase in thermal conductivity with the rise of temperature and volume fraction. The enhancement of this parameter with temperature was probably due to the different shapes of the former agglomerates. They were broken by the thermal energy in aggregates of different forms. A correlation of these structures with temperature was established. Finally, an empirical model was developed for predicting thermal conductivity with particle volume fraction and temperature.
eng
Atribución 4.0 Internacional
Física
Green Synthesis, Characterization, and Empirical Thermal Conductivity Assessment of ZnO Nanofluids for High-Efficiency Heat-Transfer Applications
journal article
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URL
https://riuma.uma.es/bitstreams/97c22a50-3284-465f-9569-01cecf516cf0/download
File
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028e5bfe40b28b05ca54d74151422bf0
5511341
application/pdf
materials-16-01542-v2.pdf