XPS valence band observable light-responsive system for photocatalytic acid Red114 dye decomposition using a ZnO-CuO heterojunction.

ZnO-CuO composites were made as photocatalysts in a range of different amounts using an easy, cheap, and environment-friendly coprecipitation method due to their superior visible light activity to remove pollutants from the surrounding atmosphere. X-ray diffraction and Fourier transform infrared spectroscopy (FT-IR) have demonstrated that ZnO-CuO catalysts are made of highly pure hexagonal ZnO and cubic CuO. X-ray photoelectron spectroscopy has confirmed that there is a substantial interaction between the two phases of the resultant catalyst.