Green route of silver nanoparticles synthesis using grape (Vitis vinivera) fruit extract for mercury ion detection
M Lutfi Firdaus1, Hadi Apriyoanda1, Elvinawati1, Lena Rahmidar2, Eko Swistoro1 and Agus Sundaryono1
1 Graduate School of Science Education, Bengkulu 38371, Indonesia
2 Material Science Research Group, Universitas BSI, Bandung 40291, Indonesia
Abstract
Here we report the green synthesis of silver nanoparticles using a reductant of fruit extract of common grape vine (Vitis vinivera), and its application for mercury ion detection. The precursor of silver nanoparticles was silver nitrate, and the formation of silver nanoparticles was accelerated in the presence of sunlight. After 30 minutes of sunlight irradiation, the yellowish-brown silver nanoparticles were formed with peak absorbance at 420 nm wavelength. The formed silver nanoparticles were then tested to various alkaline, alkaline earth and transition metals. Most of the metals has no effect to the silver nanoparticles except for mercury ions that change the color of silver nanoparticles to colorless. Therefore, silver nanoparticles are selective to detect mercury ions in aqueous solution. In addition, we used the digital image-based colorimetry method to quantify mercury ions in samples solution. Compared to the reference method, the developed colorimetry was accurate up to 99.38%.
Keywords: mercury; silver nanoparticles; vitis vinivera; colorimetry; spectrophotometry; digital image.
Topic: Chemistry