The book "Synthesis, Characterization and Photocatalytic Applications of ZnO+GO" offers a comprehensive study of the synthesis and characterization of zinc oxide nanoparticles (ZnO) in combination with graphene oxide (GO). The authors provide a detailed description of the use of the sol-gel method for producing ZnO nanoparticles, which is achieved by neutralizing zinc chloride solutions with ammonia at pH 7. The resulting nanoparticles are calcined at high temperatures of 800 °C and 900 °C to optimize their properties. Furthermore, photocatalysis is investigated for the degradation of methylene blue to remove pollutants, incorporating various concentrations of GO into the ZnO samples. The characterization of the materials is conducted using modern techniques such as X-ray diffraction (XRD), scanning electron microscopy (SEM), and UV-Vis spectroscopy to analyze the structural and optical properties of the nanoparticles. This specialized book is aimed at professionals and students in the fields of chemistry, materials science, and environmental engineering.