BiOCl/g-C3N4-Br光催化降解罗丹明BOA北大核心CSTPCD

A binary heterojunction photocatalyst,BiOCl/g-C3N4-Br,was synthesized by in-situ growth method and characterized by XRD,SEM,FTIR,XPS,and UV-vis DRS.The photocatalytic degradation activity of BiOCl/g-C3N4-Br to RhB under simulated visible light irradiation was investigated.The experimental results show that:Compared to g-C3N4-Br and BiOCl alone,BiOCl/g-C3N4-Br exhibits significantly improved photocatalytic activity,and under the conditions of RhB mass concentration 20 mg/L,BiOCl/2%-g-C3N4-Br amount 5 g/L,fluorescent lamp power 40 W,and irradiation time 90 min,the RhB removal rate can reach 98%;After 4 cycles of reusing,the RhB removal rate gradually decreases from 98%to 90%,demonstrating good stability and reusability of the photocatalyst.The oxidation-reduction reactions in the photocatalytic degradation process occur on the surface of BiOCl and g-C3N4-Br,respectively.The Z-scheme heterojunction formed on the highly compact interface between BiOCl and g-C3N4-Br achieves rapid separation of electrons and holes and reduces their recombination rate inside the catalyst,thereby enhancing the catalytic performance.