High thermal conductivity of green nanofluid containing Ag nanoparticles prepared by using solution plasma process with Paramignya trimera extract

Herein, we present for the first time a quick, easy, effective, and green method for preparing green nanofluids containing silver nanoparticles. The solution plasma method with a high-voltage DC power source and extracts from the Paramignya trimera was employed to prepare silver nanoparticles. The obtained results showed that silver nanoparticles were spherical, with a small average size of - 8 nm and fairly uniformly dispersed in solution. Surface plasmon resonance spectra show a strong peak at 410 nm for the prepared samples. The Fourier transform infrared spectra revealed the presence of possible functional groups on the surface of silver nanoparticles. Furthermore, the formation mechanism of silver nanoparticles is also proposed. The effect of the preparation times on the thermal conductivity of nanofluid was also investigated. As a result, the nanofluids prepared with longer preparation times had higher thermal conductivity and the highest improvement of 18.3% was obtained for the nanofluid using 4 min preparation compared to the base fluid. The obtained results indicate promise for a simple, fast, and environmentally friendly method for producing nanofluids containing silver nanoparticles with high thermal conductivity for potential applications.

Automated summary

In this study, a quick, easy, effective, and green method for preparing green nanofluids containing silver nanoparticles was introduced for the first time. The solution plasma method with a high-voltage DC power source and extracts from the Paramignya trimera was utilized to prepare spherical silver nanoparticles with an average size of approximately 8 nm, which were uniformly dispersed in solution. The prepared nanofluids exhibited high thermal conductivity, with a maximum improvement of 18.3% obtained for the nanofluid prepared using a 4-minute preparation time compared to the base fluid. These results demonstrate the potential for this simple and environmentally friendly method in producing nanofluids with high thermal conductivity for various applications.