University of Kashan Journal of Nanostructures 2251-7871 15 4 2025 10 01 Graphite Nanosheet Prepared by Nickel Sulfate Exfoliating and Thermal Treatment and Its Action in Photodegradation of Crystal Violet 1741 1750 115023 10.22052/JNS.2025.04.017 EN Eman Turky Shamkhy Department of Basic Science, College of Dentistry, University of Baghdad, Iraq Amjed Mirza Oda Science Department, College of Basic Education, University of Babylon, Babylon, Iraq Journal Article 2025 06 06 Nanographite surface was prepared by heat treatment of graphite-saturated nickel sulfate as an exfoliating agent to produce a very fine brown powder. The procedure depends on heating the saturated sample and oxidation by 50% of nitric acid with ultrasonic bath. The resulting powder is easily dispersed in water and characterized by UV-vis spectroscopy, where the new absorption at 224 nm is not present in bulk graphite and reveals of formation of oxidized nanographite. FTIR showed the skeleton of graphite is changed and new absorption of C=O. XRD of highly crystallized graphite modified to low-intensity peak as an indication of sheets displacement. SEM image showed the microscale flake of nanographite as singular flakes with different dimensions. Photocatalysis reaction was done for crystal violate dye in aqueous solution combined with UV lamp. The nanosheets have the ability for photodegradation of CV lasted 180 min but in the presence of H2O2, the vanishing needs 15 min with 96% photodegradation efficiency. https://jns.kashanu.ac.ir/article_115023_a96310b41e62cc64535843cdc554c924.pdf