Hybrid system of photocatalytic fuel cell (PFC) and electro-Fenton (EF) process emerges as an environmentally sustainable technology for wastewater treatment and energy recovery. The established dual-cell hybrid system can reduce the recombination of electron and hole in photoanode and PFC acts as the power source for EF process. Hence, the optimal conditions for dye degradation synchronized with electricity generation in the dual-cell hybrid system should be determined. The in-situ generation of hydroxyl radicals was the key factor for dye degradation in the system. Hence, the operating parameter such as aeration and initial pH of dye were assessed. Higher decolourization efficiency was attained in aerated PFC (76.6 %) and aerated EF process (84.5%). Enhanced power density (1.493 μW cm^-2) was achieved in aerated hybrid system through the elevated transfer of electrons from photoanode in PFC to the cathode of EF process. Acidic environment was favoured for the dye degradation in both PFC and EF process. At optimal pH 3, PFC and EF process attained highest colour removal efficiency which were 88.5 % and 84.5 %, respectively. Consequently, largest power density (2.221 μW cm^-2) and maximum current density (0.012 mA cm^-2) were achieved in the hybrid system under pH 3 condition in both PFC and EF process.

光催化燃料电池（PFC）和电芬顿（EF）工艺的混合系统作为废水处理和能量回收的环境可持续技术而出现。已建立的双电池混合系统可以减少光阳极中电子和空穴的复合，而PFC可以作为EF工艺的电源。因此，应该确定在双电池混合系统中与发电同步的染料降解的最佳条件。羟基自由基的原位生成是系统中染料降解的关键因素。因此，评估了操作参数，例如曝气和染料的初始pH。充气PFC（76.6％）和EF充气（84.5％）可获得更高的脱色效率。增强的功率密度（1.493μWcm ^-2）是在充气混合系统中通过将电子从PFC中的光电阳极到EF过程的阴极的转移转移提高而实现的。酸性环境有利于PFC和EF工艺中的染料降解。在最佳pH 3下，PFC和EF工艺获得最高的脱色效率，分别为88.5％和84.5％。因此，在PFC和EF工艺中，在pH 3条件下的混合系统中，获得了最大功率密度（2.221μWcm ^-2）和最大电流密度（0.012 mA cm ^-2）。