Recovery and recycling of silica fabric from waste printed circuit boards to develop epoxy composite for electrical and thermal insulation applications.

Printed Circuit Boards (PCBs), a primary component of electronic waste (E-waste), contain silica fabric as a major non-metallic material, which needs to be reutilized for high-performance applications. This study focuses on the separation and recovery of silica fabrics through pyrolysis and their subsequent use in developing silica fabric-epoxy composites (SFR). Extracted silica fabric was characterized through FTIR, XRD, XPS, and SEM for morphology analysis.

Green synthesis of silver nanoparticles using Annona squamosa L. seed extract: characterization, photocatalytic and biological activity assay.

The aqueous seed extract of Annona squamosa L. was used as a reducing and stabilizing agent for the synthesis of silver nanoparticles (AgNPs). The formation of AgNPs in aqueous silver nitrate solution after the addition of the extract was indicated by a colour change from pale yellow to dark brown corresponding to a λ at 430 nm.