In this study, a dual-chamber microbial photoelectrochemical cell (MPEC) composed of a bio anode and a photoresponse AgBr/ZnO-modified graphite as a photocathode was investigated. The cell efficacy in degrading reactive black 5 (RB5), a diazo dye, in the cathodic chamber and simultaneously, electricity generation was analyzed. The synthesized AgBr/ZnO photocatalyst was characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), UV–vis diffuse reflectance spectra (UV-vis DRS), photoluminescence (PL), linear sweep voltammetry (LSV), and electrochemical impedance spectroscopy (EIS). Under light irradiation, the MPEC equipped with AgBr/ZnO-modified photocathode yielded 61% RB5 dye degradation over 72 h which indicated a highly enhanced performance compared with the irradiated bare graphite (11.74%). Besides, the maximum power density produced was 53.8 mW m⁻² under visible light illumination and 32.5 mW m⁻² in dark conditions. The MPEC reported in this research seems to be a promising system for bioelectricity generation, wastewater treatment in the anodic chamber, and also, dye pollutant degradation in the cathodic chamber.

在这项研究中，研究了由生物阳极和作为光电阴极的光响应 AgBr/ZnO 改性石墨组成的双室微生物光电化学电池 (MPEC)。分析了在阴极室中降解活性黑 5 (RB5)（一种重氮染料）的电池效率，同时分析了发电量。采用X射线衍射(XRD)、X射线光电子能谱(XPS)、扫描电子显微镜(SEM)、紫外-可见漫反射光谱(UV-vis DRS)、光致发光(PL)对合成的AgBr/ZnO光催化剂进行表征、线性扫描伏安法 (LSV) 和电化学阻抗谱 (EIS)。在光照射下，配备 AgBr/ZnO 修饰的光电阴极的 MPEC 在 72 小时内产生 61% 的 RB5 染料降解，这表明与照射的裸石墨相比具有高度增强的性能 (1​​1. 74%）。此外，产生的最大功率密度为 53.8 mW m^-2在可见光照射下，32.5 mW m ^-2在黑暗条件下。本研究报告的 MPEC 似乎是一种很有前景的系统，可用于生物发电、阳极室废水处理以及阴极室染料污染物降解。