چكيده به لاتين
In this research, Copper oxide was synthesized using a simple co-precipitation method by different precursors (acetate, nitrate, and sulfate). All the synthesized materials were characterized using UV-visible, FT-IR, XRD techniques and the morphologies were studied using SEM images. Besides, the band gap of the synthesized material was investigated using DRS spectroscopy. For a comparative purpose, CuO was synthesized in two environmental conditions of pH, acidic and basic. After synthesizing of CuO, the photocatalytic activity of the prepared CuO was studied to determine its absorbance and performance in degradation of methylene blue. As the best performance obtained for the CuO synthesized in the acidic environment using copper nitrate precursor, it was chosen for the next synthesis.
Graphene oxide was synthesized using a simple modified hummer’s method. Furthermore, two routes of hydrothermal and co-precipitation methods were used to synthesize the CuO/rGO nanocomposite. In order to investigate the effect of GO on characteristics of nanocomposite, the different weight ratios of GO to CuO (1:5, 1:10, 1:15, 1:20 and 1:25) were used. The results indicated that weight ratio of 1 to 5 (GO to CuO) has the highest amount of photocatalytic degradation and absorbance of methylene blue (200 ppm) as high as 97%, while the CuO could degrade a 20 ppm methylene blue about of 70%. This noticeable improvement can be attributed to intrinsic absorption property of graphene and the probable increase in the amount of charge career caused by formation of the composite.
