Fabrication of Zn1-XCuXO nanoparticles and investigation of their effect on the thermal conductivity of nanofluids

Document Type : Research Paper

Authors

Department of Physics, Faculty of science, Shahid Chamran University of Ahvaz, Ahvaz, I.R. Iran

Abstract

The main purpose of this research is to investigate the effect of doped nanoparticles on the thermal conductivity of nanofluids. ZnO, CuO, and Zn1-XCuXO doped nanoparticles were first fabricated by the sol-gel auto-combustion method using glycine as fuel with different molar ratios of glycine/metal ions. Different values of X = 0.02, 0.03, 0.04, 0.06, 0.07, and 0.08 were used to fabricate the Zn1-XCuXO doped nanoparticles. The X-ray diffraction patterns showed that the substitution of Zn atoms with Cu atoms was completed for X = 0.02 and 0.03, so X = 0.03 was obtained as the solubility limit for fabricating Zn1-XCuXO doped nanoparticles. The Zno, CuO, and Zn0.97Cu0.03O doped nanoparticles were then used as an additive to prepare ethylene glycol-based nanofluids with different nanoparticle concentrations. The results showed the highest observed thermal conductivity enhancement was 12.5 % and related to the nanofluid containing Zn0.97Cu0.03O doped nanoparticles at a concentration of 0.5 wt%. Moreover, adding Cu to the ZnO structure increased the thermal conductivity of the ethylene glycol-based nanofluid containing Zn0.97Cu0.03O doped nanoparticles due to its high thermal conductivity.

Graphical Abstract

Fabrication of Zn1-XCuXO nanoparticles and investigation of their effect on the thermal conductivity of nanofluids

Highlights

  • There are few reports on the use of doped nanoparticles to prepare nanofluids. So in this study, Zn0.97Cu0.03O doped nanoparticles were used as an additive to prepare ethylene glycol-based nanofluids.
  • The results showed that the thermal conductivity of nanofluids containing Zn0.97Cu0.03O nano-particles was improved.
  • The highest observed thermal conductivity enhancement was 12.5 %.
  • An advantage of using doped nanoparticles as additives in the preparation of nanofluids is enhanced nanofluid stability.

Keywords

Main Subjects


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Volume 8, Issue 2
November 2022
Pages 95-102
  • Receive Date: 25 March 2023
  • Revise Date: 11 May 2023
  • Accept Date: 13 May 2023
  • First Publish Date: 13 May 2023