Preparation of environment-friendly 3D eggshell membrane-supported anatase TiO2 as a reusable photocatalyst for degradation of organic dyes

We fabricated a low-cost and efficient composite photocatalyst material, combining eggshell membrane (ESM) and titanium dioxide (TiO 2 ) nanoparticles, through self-assembly method. ESM with 3D porous structures provide scaffolds for TiO 2 nanoparticles. Polyethyleneimine (PEI) was used to modify ESM by grafting amine groups. The microstructure and property of the fabricated composites were studied by various characterization methods. The composite was used for the photodegradation of Rhodamine B (RhB). The results demonstrate that the composite catalyst possesses good photocatalytic performance for dye degradation under sunlight irradiation simulated by a xenon lamp. Functionalization based on nanomaterials may promote the applications of ESM.