Synergetic Photocatalytic Fuel Cell and Cufe Layered Doubled Hydroxide as Photoactivator of Persulfate for Dramatically Electricity Generation of Organic Pollutants Degradation

A novel self-driven photo-assisted fuel cell (PFC) system composed of a visible responsive photoanode (TiO2 nanotubes/Ag/AgBr) and polypyrrol/multi walled carbon nanotube/Fe3O4 (Ppy/MWCNT/Fe3O4) cathode was constructed. In the present study, a coupling method by introducing Cu-Fe layered doubled hydroxide (CuFe-LDH) as photoactivator of persulfate (PS) into a photo fuel cell (PFC) was employed to promote the degradation of quinoline and synchronous electricity generation. The optimum PFC system indicated an efficient and stable removal of quinoline (98.2 ℅) with a rate constant 1.69 min−1, and yields an open circuit voltage 1.1 V, a short circuit current 2.85 mA cm−2, a power density 0.76 mW cm−2. The PFC/ CuFe-LDH/PS indicated significant cell performance, incrementing the quinoline degradation by 42.76% and electricity production by 80.26% compared to the single photocatalytic fuel cell system. This work presents a high-efficient approach to eliminate organic compounds and synchronously generate electrical power.