Highly stable copper/carbon dot nanofluid |
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Authors: | Zoha Azizi Abdolmohammad Alamdari Mohammad Mahdi Doroodmand |
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Institution: | 1.Department of Chemical Engineering,Mahshahr Branch, Islamic Azad University,Mahshahr,Iran;2.Department of Chemical Engineering, School of Chemical and Petroleum Engineering,Shiraz University,Shiraz,Iran;3.Department of Chemistry, College of Sciences,Shiraz University,Shiraz,Iran |
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Abstract: | Copper/carbon dot nanohybrids (Cu/CD NHs) were prepared via a facile precipitation method through a disproportionation reaction. The surface characterization was performed by various techniques such as XRD, FTIR and TEM. Then, water-based nanofluids composed of Cu/CD NHs at 0.1 and 0.5 mass% were prepared, and their thermo-physical properties including thermal conductivity, viscosity, density and specific heat were evaluated at various temperatures. The water-based Cu/CD nanofluid demonstrated to be a potential heat transfer fluid with a high stability. It was found that the thermal conductivity can be enhanced by increasing the nanoparticle concentration and temperature. Almost 1.25-fold increase in thermal conductivity has been achieved by raising the temperature up to 50 °C and at the concentration of 0.5 mass%. The heat capacity was found to increase with increasing concentration. Moreover, by increasing temperature the density and viscosity of the as-prepared nanofluid decreased, whereas the heat capacity showed an increasing trend. |
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