Advanced Engineering S-Scheme BiCoO₃/Co-g-C₃N₄ Composite Material support on reduced Graphene Oxide for Efficient Photocatalytic Activity

Abstract

Photo-assisted catalysis, distinguished by mild reaction conditions, robust efficacy, and sustainable nature, is envisioned as a transformative solution for future environmental protection.Perovskites have garnered significant attentions and application in degrading the organic matters owing to their structural and catalytic efficacy. Moreover, bismuth-based perovskites exhibit exceptional crystal architecture coupled with an extensive light-responsive range, facilitating the effective harnessing of solar energy. This study seeks to design the S-scheme based heterostructure by integrating the BiCoO 3 with Co-g-C 3 N 4 markedly improve the photocatalytic efficacy and providing the support of the reduced graphene oxide. UV-vis DRS results reveal the optimal band gap of BiCoO 3 (1.90 eV), g-C 3 N 4 (2.82 eV), and Co-g-C 3 N 4 (2.68 eV) depicting Co dopant effectively improves the energy gap of g-C 3 N 4 and elevates its ability to absorb visible light.Subsequent photocatalytic evaluation demonstrated that the BCO/Co-g-C 3 N 4 /rGO heterostructure showing superior activity towards both safranin-O (99%) and methyl orange (97%). Radical scavenging tests provide the evidence that •O 2 -and •OH are the key factors that are responsible for the dye's degradation process. The outstanding efficacy and stability of BCO/Co-g-C 3 N 4 /rGO up to 4 cycles is facilitated by the synergistic cooperation among BiCoO 3 and Co-g-C 3 N 4 , with rGO functioning as a key factor in accelerating the transfer of the e -across the heterojunction.