Green synthesis of silver nanoparticles using Carica Papaya fruit extract under sunlight irradiation and their colorimetric detection of mercury ions

2nd International Symposium on Frontier of Applied Physics

Firdaus, M.^1 ; Andriana, S.^1 ; Elvinawati^1 ; Alwi, W.^1 ; Swistoro, E.^1 ; Ruyani, A.^1 ; Sundaryono, A.^1

Graduate School of Science Education, University of Bengkulu, 38371, Indonesia^1

关键词: Aqueous extracts;    Colorimetric detection;    Environmental sensor;    Green synthesis;    Hazardous heavy metals;    Silver nanoparticles (AgNps);    Sunlight irradiation;    UV-visible spectrophotometry;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/817/1/012029/pdf
DOI  :  10.1088/1742-6596/817/1/012029

来源: IOP

【 摘 要 】

We have successfully synthesized silver nanoparticles (AgNPs) by using aqueous extract of papaya (Carica papaya) fruit as bioreductant under sunlight irradiation without additional capping agent. Characterizations were done using UV-Visible spectrophotometry and Fourier Transform Infrared Spectroscopy (FTIR). The synthesized AgNPs have yellowish-brown color with surface plasmon resonance peak at 410 nm. Good selectivity of the AgNPs towards hazardous heavy metal of mercury ions in aqueous solution has been developed as a green environmental sensor. The presence of Hg(II) ions in the mixture changed the yellowish-brown color of AgNPs to colorless due to oxidation of Ag(0) in AgNPs to Ag(I) ions. Effect of samples matrix such as alkali metal, alkaline earth metal and transition metal ions were evaluated.