 In summary, this study has shown that olive fruit extract-based zinc oxide nanoparticles, Xeno and OFE endpiece, can be successfully synthesized using a one-pot sustainable method. These endpiece were characterized using UVVIS, FTIR, SEM, EDX and XRD, which showed that they had a crystalline structure with a hexagonal worksite phase. Furthermore, the photocatalytic and antioxidant activities of these endpiece were evaluated, showing that they are effective in degrading both methylene blue and methyl orange dyes under sunlight irradiation. Additionally, the endpiece also displayed strong antioxidant activity against DPPH, hydroxyl, peroxide and superoxide radicals. Therefore, Xeno and OFE endpiece could potentially be used as a cost-effective and green photocatalyst for wastewater treatment. This article was authored by Sadia Gaffer, Asa Abbas, Muhammad Naim al-Hassan and others.