Preparation and Characterization of Ag Doping TiO2 Nanomaterial for the Photocatalytic Degradation of Malachite Green as a Model Cationic Dye
نویسندگان
1 Department of Chemistry, College of Sciences for Girls, University of Babylon, Hilla, Iraq
2 Department of Chemistry, College of Sciences for Girls, University of Babylon, Hilla, Iraq
doi
10.22052/JNS.2024.01.031چکیده
Titanium dioxide (TiO2) NPs were prepared using the modified hydrothermal process. Silver(Ag) doped Titanium dioxide (TiO2), were prepared photo reduction method, characterization Ag / TiO2 nanoparticles by x- ray diffraction(XRD), thermos gravimetric analysis (TGA), and UV-Vis Diffuse Reflectance Measurements(BG), FESEM , and TEM .Malachite green (MB) dye was used as a model pollutant to study the photocatalytic activity of Ag /TiO2 nanoparticles under UV light irradiation. The influence of the amount of Ag /TiO2 nanoparticles catalyst as well as of initial concentration of MG dye was investigated. When the increase in catalyst amount up to 0.3 g/L increase the number of active site, but beyond 0.3g/L there is little increase in % degradation. Thus best catalyst 0.3g/L used to removal MG dye. Photo catalytic activity rise was observed for Ag / TiO2 nanoparticles which is about 95.67%. Photocatalytic degradation efficiency (PDE %) increases as the dye concentration decreases from (98.67% - 40.76%), and the photo degradation capacity rise when light intensity increase. It probably deduced, the rise of light intensity caused to excited particles of Ag /TiO2 nanoparticles. The photo catalytic degradation efficiency was 83.9%, 78.8 %, and 68.5% during 3 cycle compared to standard solution (fresh) was 90.9%. The best reactive oxygen species (ROS) when used hydrogen peroxide (H2O2) comparative with methanol, thus the hydrogen peroxide important in enhancing the performance of photo catalytic degradation.
