ABSTRACT
This project involves modification of the photoresponse of zinc oxide by sensitization with
riboflavin (RF) as a photosensitizer. Sensitization of the surface of zinc oxide with RF was performed
using impregnation method. Modification of zinc oxide surface with this photosensitizer was
investigated using different techniques such as XRD, FTIR, SEM and UV-Visible spectroscopy. The
photocatalytic activity of both neat and sensitized zinc oxide was investigated by removal of
methylene blue dye (MB) from the simulated industrial wastewater. Removal of this dye from the
aqueous solutions was conducted by measuring the absorbance of this dye at 665 nm
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