Biosynthesis of silver nanoparticles: A colorimetric optical sensor for detection of hexavalent chromium and ammonia in aqueous solution

摘要

The current study is focussed on bio-fabrication of single step Durenta erecta (D. erecta) fruit extract synthesis of silver nanoparticles (Ag NPs). The prepared materials were examined through UV-Vis spectrophotometry due to localized surface plasmon resonance (SPR) and were found highly stable. X-ray diffraction (XRD) revealed face centered cubic (fcc) crystalline nature of Ag NPs. Morphologies and average size of Ag NPs was evaluated by field emission-scanning electron microscopy (FE-SEM), while elemental analysis was carried out by energy dispersive X-rays spectroscopy (EDS) and X-ray photo electron spectroscopy (XPS). Fourier transform infrared spectroscopy (FTIR) displayed the presence of the functional groups responsible for reducing as well as stabilizing of Ag NPs.