Abstract
ABSTRACT In this study, developments were made for silver nanoparticles (AgNPs) synthesis as a colorimetric sensor that is rapid and selective using a bio-reductant of lemongrass extract. The synthesised AgNPs were designed to detect Pd2+ using aqueous, paper, and gel methods. AgNPs were characterised by UV-Vis, FTIR (Fourier Transform Infrared), TEM (Transmission Electron Microscopy), and XRD spectroscopic analysis (X-Ray Diffraction). These AgNPs aqueous colorimetric sensors showed a good selectivity towards Pd metal ions, which was characterised by AgNPs SPR (Surface Plasmon Resonance) tape shifts at 430 nm wavelengths, with the colour change from dark yellow to clear greyish within 5 seconds. The colour changed from yellow to white for AgNPs paper and dark yellow to bright yellow for the gel colorimetric sensor after 5 seconds interaction with Pd2+. The limit of detection for aqueous, paper, and gel were 48.635 ppb, 5 ppm and 5 ppm, respectively. Method validation has been conducted, and these AgNPs sensors were applied for monitoring the Lake Sasak, South Tangerang, water samples and the accuracy and precision of the sensor were tested. This sensor is expected to establish an alternative technique for in situ Pd2+ detection and lake water monitoring.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call