A metal organic framework decorated 2-dimensional nanomaterial based nanocomposite photocatalyst for photocatalytic degradation of dyes from textile industry wastewater

Abstract

Photodegradation and removal of pollutants from textile industry wastewater is a critical challenge because it contains different types of complex organic pollutants. Hence, in the present research, octahedral structured MIL-101(Cr) surface modified h-BN and TiO₂ based polyvinylidene fluoride (PVDF) photocatalytic mixed matrix membranes (MMMs) are used for effective photodegradation of dyes and pollutant removal from textile industry wastewater. The effect of h-BN, TiO₂ and MIL-101(Cr) composite photocatalyst loading into the PVDF membrane is studied using XRD, FTIR, FE-SEM, XPS, EDX mapping, HR-TEM, AFM, tensile strength and water contact angle. H-BN and TiO₂ show good stability and resistance to the photo-corrosion of the MIL-101(Cr) photocatalyst. The recombination of h⁺ and ˙O₂⁻ is effectively controlled by PVDF photocatalytic MMMs for the degradation of dyes. 96.34% COD and 99.17% TSS removal are achieved by the photocatalytic PVDF MMMs. The h-BN@MIL-101(Cr)/PVDF photocatalytic MMM shows effective dye degradation performance and good commercial potential for practical applications in the future.