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[Display omitted] • TiO 2 -WO 3 @GO/PVDF-DLHF photocatalytic membrane with catalytic memory was fabricated. • 3 wt% photocatalyst loaded membrane achieved 98.62% TOC rejection in visible light. • Good anti-fouling and self-cleaning with water flux of 99.51 L/m2h and FRR of 91.35 % • 3 wt% loaded membrane achieved 68.56% TOC rejection for memory catalysis. • Excellent stability after prolonged use with a TOC rejection of 89.76% Oilfield-produced water (OPW) is a complex wastewater that is difficult to treat causing significant harm to the environment. Photocatalytic membranes are emerging for OPW treatment. However, they suffer significant fouling due to the inability to self-clean during prolonged treatment. They also require continuous photo assistance to sustain the catalytic process. This limits their applications in the absence of light referred to as memory catalysis. This work reported the fabrication of a unique ternary photocatalyst TiO 2 -WO 3 @GO/PVDF dual-layer hollow fiber (DLHF) photocatalytic membranes for photodegradation and memory catalysis of total organic carbon (TOC) in OPW. The photocatalytic membranes were fabricated via phase inversion and co-extrusion method varying (0,1,3,5) wt% of the TiO 2 -WO 3 @GO photocatalyst. The membranes were characterized and their performances for TOC removal under visible light and memory catalysis were evaluated. The membranes exhibited excellent TOC degradation, rejection, anti-fouling, self-cleaning, and catalytic memory. The WO 3 was responsible for electron storage within the system and improved the absorptive capacity of TiO 2 in the visible range while the GO promoted the electron-hole transfer creating abundant active sites for photocatalytic reaction. The 3 wt% loaded membrane showed the best TOC rejection of 98.62 % after 6 h of operation, water and permeate fluxes of 99.51 L/m2h, and 76.54 L/m2h respectively. The membrane showed good catalytic memory in the dark with a TOC rejection of 68.56 % after 6 h, OPW flux recovery ratio (FRR), and TOC rejection of 91.35 % and 89.76 % respectively after 5 cycles of operation under visible light. This work is expected to bring a paradigm shift toward the fabrication of memory catalytic membranes for wastewater treatment. [ABSTRACT FROM AUTHOR]