Nanoparticle synthesis from pineapple waste using Copper (II) Sulphate Pentahydrate

Nanoparticles have been widely used especially metallic type as they have many potential applications that can be applied. Copper-based nanoparticles have been chosen to be synthesized by biological method. This green synthesizing method is easy, efficient and eco-friendly compared to chemical-mediated or microbe-mediated synthesis. Copper is highly conductive metal and less expensive compare to silver and gold also, they have excellent physical and chemical properties and also low cost of preparation. In this research project, different volume of ratio of CuSO₄.5H₂O and pineapple extract; 1:2, 1:3, 1:4 and temperature at room to 80°C were used to synthesize CuNPs. The result from UV-Vis shows that the broad peak was obtained mostly around 341 to 343 nm . Plus, large amount of aqueous pineapple and high range of temperature were required to make the reduction of Cu₂+ effectively. FTIR result shows that the stretching frequency region contains phenols and alcohol, alkyne and amide. These CuNPs were in shape of spherical through observation from FESEM. Plus, the size of sample with ratio (CuSO₄.5H₂O: pineapple extract) 1:2 was within the range of 40-70 nm while for ratio 1:4 the size was in between 30-50 nm.