Photocatalytic Drug Degradation and Supercapacitor Applications of FeVO₄ and rGO‐FeVO₄ Nanocomposite

Abstract Constructing novel multifunctional materials is a promising approach to boost the catalytic activity and electrochemical performance simultaneously. Herein, hydrothermal synthesized FeVO₄ nanosized particles dispersed on reduced graphene oxide (rGO) through cost‐effective simple sonochemical assisted route are developed as an efficient material for photocatalysis activity and high‐value‐added supercapacitor applications. The synthesized materials were characterized for structural and morphological purity and found to be in single phase and nanostructured. rGO‐FeVO₄ composite shows excellent photodegradation of Levofloxacin (LVO) drug (100 % over 80 min) compared with FeVO₄ owing to the bandgap in visible region and larger surface area. Further, the optimized rGO‐FeVO₄ composite was employed into supercapacitors and it showed 3 times higher capacitance (211.4 F/g at 0.5 A/g) compared with FeVO₄ (70.4 F/g) using half‐cell measurements. Moreover, the developed symmetric supercapacitors (full cell; SSCs) using rGO‐FeVO₄ composite device showed 109 F/g capacitance at 0.5 A/g current density having high energy density of 13.6 Wh/kg at the power density of 450 W/kg. The proposed rGO‐FeVO₄ composite proved its multifunctional outcomes, which can open new opportunities to develop such materials for numerous future applications.