SYNTHESIS OF COPPER NANOPARTICLES FROM WASTE ONION PEELS


Açıkel Ü. , Keskin Z. S. , Topal Canbaz G. , Sağ Açıkel Y.

The Fifth International Symposium on Pharmaceuticaland Biomedical Sciences, Nevşehir, Türkiye, 26 - 28 Nisan 2019, ss.107-112

  • Basıldığı Şehir: Nevşehir
  • Basıldığı Ülke: Türkiye
  • Sayfa Sayıları: ss.107-112

Özet

Nanoparticles have extremely small dimensions and a high surface area/volume ratio, so they have chemical and physical differences, such as catalytic reactivity, thermal and electrical conductivity, chemical stability, optical performance, antimicrobial activity, compared to larger particles of the same chemical composition. The physical and chemical processes used in the synthesis of nanoparticles have the disadvantages of producing many toxic substances that pollute the environment because they require high amounts of temperature and energy. In recent years, in the synthesis of Au, Ag, Pt, Pd, Zn, Cu metal nanoparticles; biocompatible, non-toxic solvents, high cost-free, synthesized nanoparticles with good distribution, environmentally friendly biological synthesis methods are preferred. In this study, copper nanoparticles (CuNPs) were synthesized by the green, fast and environmentally friendly method using the extract of onion peel which is a waste material. Onion peel and CuSO4.5H2O were used as a starting material for the synthesis of CuNPs. The color of the solution changed from the blue color of Cu solution to black revealing the formation of CuNPs. Formation of CuNPs was easily observed by UV-Visspectroscopy. In addition, the characterization of CuNPs was performed by SEM images and FTIR analyses. For CuNPs synthesis, the optimum ratio of onion extract CuSO4.5H2O solution was determined as 70:50. The optimum copper concentration in solution and synthesis temperature were determined as 0.5 M and 20oC, respectively. In this study, both the environmentally hazardous agricultural and domestic wastes were evaluated, reused, and the onion peel waste was shown to be suitable for the production of CuNPs.