Heterogeneous Cu-Sn-Ppy Mediated Synergistic Photo-Fenton and Photothermal Catalysis for Dye Elimination

Abstract

Refinery organic contaminants (ROCs) have been widely studied for their harmless treatment through the photo-Fenton reaction. However, traditional photo-Fenton catalysts still suffer from issues such as high electron-hole recombination rates, low light absorption rates, and a narrow pH range. To address these problems, we have developed a Copper-Stannum-Polypyrolle-Heterogeneous (Cu-Sn-PPy Heterogeneous, CSPHGs) catalytic system. The system uses a PN junction formed by two oxide semiconductors (Cu2O and SnO2) as the core, which is then coated with polypyrolle (PPy) on the outer layer. Under near-infrared (NIR) light irradiation, the catalytic system exhibits excellent photo-thermal effects. The Rhodamine B (RhB) degradation experiments have demonstrated that the reactive oxygen species (·OH) generated by this catalytic system can effectively catalyze the decomposition of dyes. This research provides a new option for environmental remediation through the combination of photo-Fenton and photothermal processes.

Keywords: Refinery organic contaminants, Photothermal, Heterogeneous, Photocatalysis, dye degradation