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Sintesis Hijau Fotokatalis Zno Ko-Doping Ag, cu berbasis ekstrak kulit manggis untu degradasi Metil Jingga
The clean-water crisis caused by the textile industry due to the disposal of organic compounds waste, can be effectively addressed using a ZnO semiconductor-based photocatalyst method. This research aims to enhance the activity of ZnO photocatalysts through Ag and Cu doping synthesized with mangosteen peel extract. The composition of Ag and Cu doping in ZnO follows the molar fractions of AgxCuyZnO(1−x−y), where (x = 0,01 and y =0,01, 0,02, 0,03, 0,04). The samples were characterized using UV-Vis, XRD, SEM-EDS, and FTIR. The results showed an absorbance peak in the wavelength range of 371-400 nm, with an energy band gap of 2,66-3,13 eV. The crystal structure of ZnO and (Ag, Cu)/ZnO samples was hexagonal wurtzite. SEM morphology revealed nanoflower-shaped particles for pure ZnO and spherical particles for the doped samples. EDS confirmed the presence of Zn, O, Ag, and Cu. The FTIR spectrum showed an absorption peak at 3500-3156.64 cm⁻¹, indicating the O-H functional group (hydroxyl) originating from phenolic and flavonoid compounds. The photocatalytic activity test showed that the 1% Cu sample (Ag0.01Cu0.01ZnO0.98) was the most effective, degrading 85.95% of the methyl orange. Thus, (Ag, Cu)/ZnO proved more effective in accelerating the degradation of methyl orange under UV light compared to pure ZnO.
Keywords : ZnO, Ag, Cu, Methyl Orange, Photocatalyst
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