Iranian Research Organization for Science and Technology Journal of Particle Science and Technology 2423-4087 8 2 2022 11 01 Fabrication of Zn1-XCuXO nanoparticles and investigation of their effect on the thermal conductivity of nanofluids 95 102 1273 10.22104/jpst.2023.6200.1225 EN Ameneh Ahangarpour Department of Physics, Faculty of science, Shahid Chamran University of Ahvaz, Ahvaz, Iran 0000-0001-8239-7440 Amal Shakhi Department of Physics, Faculty of science, Shahid Chamran University of Ahvaz, Ahvaz, Iran 0000-0002-0048-6085 Mansoor Farbod Department of Physics, Faculty of science, Shahid Chamran University of Ahvaz, Ahvaz, Iran Journal Article 2023 03 25 The main purpose of this research is to investigate the effect of doped nanoparticles on the thermal conductivity of nanofluids. ZnO, CuO, and Zn_1-XCu_XO 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 Zn_1-XCu_XO 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 Zn_1-XCu_XO doped nanoparticles. The Zno, CuO, and Zn_0.97Cu_0.03O 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 Zn_0.97Cu_0.03O 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 Zn_0.97Cu_0.03O doped nanoparticles due to its high thermal conductivity. https://jpst.irost.ir/article_1273_f91e24dfe80012e2a7984afa4480a6d6.pdf