Sharif University of Technology Scientia Iranica 1026-3098 31 12 2024 06 01 Investigation of structural, photo-luminescence and self-cleaning properties of thin layers of GO-ZnO and GO, GO-Ag and composite bilayer of GO-ZnO/GO-Ag prepared by spray pyrolysis method 958 966 23414 10.24200/sci.2023.61099.7140 EN M. H. Saeed Department of Science, Mustansiriyah University, Collage of Basic Education, Baghdad, Iraq. S. M. Alduwaib Department of Science, Mustansiriyah University, Collage of Basic Education, Baghdad, Iraq. D. J. Fakar Al-den Department of Science, Mustansiriyah University, Collage of Basic Education, Baghdad, Iraq. Journal Article 2022 10 24 The synthesis of graphene oxide-zinc oxide, graphene oxide- silver, graphene oxide thin layers, and graphene oxide-zinc/graphene oxide-silver bilayer was done using a method called spray pyrolysis. Characterization of the synthesized layers was done by X ray diffraction, transmission electron microscope, atomic force microscope, photo-luminescence, FTIR and BET analyses. Based on the TEM images, the given nano-composites are formed and GO can be a suitable platform for the growth of silver and ZnO nano-particles and prevents their accumulation. According to the AFM images, GO-ZnO/GO-Ag sample has the lowest roughness. PL spectrum showed a broad emission peak for GO-Ag layer at a wavelength of approximately 550 nm, which is consistent with the reported band gap of 3.6eV. From BET results, the surface area was obtained 4 m2g-1 and 14 m2g-1, for GO and GO-Ag samples respectively which were greater than the similar work. The pore diameter of GO-ZnO sample was obtained equal to 16.5 nm, indicating the superiority of the meso-holes in GO-ZnO sample. Also, the surface area of GO-ZnO/GO-Ag bilayer was around 3.6 times larger than the surface area of ZnO. The contact angles of droplet with the surface in GO, GO-Ag, GO-ZnO, GO-ZnO/GO-Ag samples are 55.02, 60.24, 31.28, 56.35, respectively. https://scientiairanica.sharif.edu/article_23414_17f1f95b9ecaaa5774e65ddafd2d43ea.pdf