Fabrication of Sn-doped In2O3 nanoparticles anchored on g-C3N4 nanosheets for enhanced degradation of Rhodamine B

Abstract

The application of visible light for the degradation of organic pollutants in wastewater represents a highly effective strategy. In this study, a series of Sn-In₂O₃/g-C₃N₄ composites were synthesized using a simple thermal polymerization method. The composites demonstrated a significant enhancement in photocatalytic properties compared to those of g-C₃N₄ or Sn-In₂O₃ alone. The optimal degradation efficiency was achieved with a RhB removal rate of 96.5 % under 150min of illumination. Furthermore, the photocatalyst maintained a consistent RhB degradation rate of 90.3 % after 5 cycles. ESR and radical scavenging experiments indicated that ·OH and ·O₂⁻ are the primary active species responsible for the degradation process. This study presents an innovative design approach for the cost-effective synthesis of highly efficient photocatalysts aimed at the degradation of organic matter.