EFFECTS OF TEMPERATURE AND CONCENTRATION CHANGES ON THE SIZE AND BIOSYNTHESIS OF GREEN GOLD NANOPARTICLES

Abstract

Various chemical and physical methods are used to prepare gold nanoparticles
(AuNPs). However, these methods involve the use of chemicals that are toxic and
harmful to the environment. Therefore, researchers have been investigating the use of
green chemistry to develop eco-friendly AuNPs. One approach is green
nanotechnology, which uses plant-derived phytochemicals to reduce gold ions and
produce AuNPs. This study aimed to follow a simple method to screen some aqueous
plant extracts and to clarify the effect of changing the concentration of the plant extract
and temperature on the synthesis of nanoparticles while determining the optimum
concentration (OC) for biosynthesizing AuNPs. Ten Libyan medicinal plants
successfully synthesized AuNPs of different sizes. It was found that concentration and
temperature changes have a role and influence on the synthesis and size of the AuNPs.