Eco‐friendly Synthesis of Silver Nanoparticles and its Application in Hydrogen Photogeneration and Nanoplasmonic Biosensing

Abstract

Environmentally friendly methods for silver nanoparticles (AgNPs) synthesis without the use of hazardous chemicals have recently drawn attention. In this work, AgNPs have been synthesized by microwave irradiation using only honey solutions or aqueous fresh pink radish extracts. The concentrations of honey, radish extract, AgNO3 and pH were varied. AgNPs presented mean sizes between 7.0 and 12.8 nm and were stable up to 120 days. The AgNPs were employed as co‐catalyst (TiO2@AgNPs) to increase the hydrogen photogeneration under UV‐vis and only visible light irradiation, when compared to pristine TiO2 NPs. The prepared photocatalyst also showed hydrogen generation under visivel light. Additionally, AgNPs were used to assemble a nanoplasmonic biosensor for the biodetection of extremely low concentrations of streptavidin, owing to its specific binding to biotin. It was shown here that green AgNPs are versatile nanomaterials, being potential candidates for hydrogen photogeneration and biosensing applications.

Green synthesis and characterization of Ag nanoparticles using fresh and dry Portulaca Oleracea leaf extracts: Enhancing light reflectivity properties of ITO glass

“…Biomanufacturing is a vital element of the green approach since it utilizes active organisms or biological parts as a replacement for costly physical or chemical approaches and delivers an ecologically harmless, and inexpensive technique for the synthesis of NPs. Biological or eco-friendly synthesis has been utilized as a green synthesis method for various range of NPs including metals, semiconductors, and quantum dots [27][28][29].…”