▎ 摘　　要

In this work, bismuth hexacyanoferrate/graphene/carbon fibers composite (BiHCF/GN/CFs) was used as a multifunctional air diffusion electrode, which exhibited a promising catalytic effect in air O-2 reduction (ORR) during photo-electro-Fenton process (PEF). BiHCF/GN/CFs, being a heterogeneous photo-electro-Fenton catalyst in PEF, could further simultaneously generate H2O2 and (OH)-O-center dot in ORR, and the generating rate of (OH)-O-center dot was 0.31 mmoL h(-1). The photo-electro-catalytic properties of BiHCF/GN/CFs in PEF process were evaluated using three types of dye wastewater including methyl orange (MO), methylene blue (MB) and rhodamine B (RB). MO, MB and RB could be, respectively, decolorized with three first-order kinetic constants of 8.9 h(-1), 3.3 h(-1) and 3.0 h(-1) at the same mass ratio of 3.8/1 in pH 4.0, 0.1 M Na2SO4. The degradation efficiency of MO was excellent with a higher TOC removal rate. [GRAPHICS]