The preparation of Red-Ox nano composite based on Zinc oxide (ZnO) and its application in removal of organic dye from aqueous solution

Wastewater from textile, paper and some other industries contain residual dyes which are not readily biodegradable and advanced oxidation processes (AOPs) are alternative techniques of removing dyes and many other organics in wastewater and effluents [1]. In this work, simultaneous synthesis of nano zero-valent iron (reductive catalyst) on ZnO (photocatalyst) was done. The results showed the photocatalytic activity of prepared photocatalyst compared with nanosized ZnO as a standard photocatalyst was increased in same operational condition. The proposed technology employs reductive decolorization by Fe0, sequentially connected to the oxidative ZnO/UV process for mineralization of organics.