Fig. 7From: Review: Porous Metal Filters and Membranes for Oil–Water Separationa Schematic illustration of the growth of CuWO4@Cu2O on copper substrate by anodisation [68]. b, c Morphology and structure of the CuWO4@Cu2O film on copper mesh [68]. d Photodegradation curves of pollutants in water by using different photocatalysts under visible light irradiation [68]Back to article page