Kinetic Investigation of Photocatalytic Degradation of Methyl Orange Dye Using Mg‐Doped Ag 2 O Nanoparticle

In the current research, the Mg‐doped Ag 2 O nanoparticles were produced by the coprecipitation method. The characterization of the as‐prepared nanoparticles was conducted through a series of techniques. SEM confirmed homogenous morphology of a sphere with minimal agglomeration. The band gap of Mg–AgO 2 was determined to be 2.6 eV. The materials were observed to possess a particle dimension of 23.87 nm. X‐ray diffraction (EDX) proved that the substance is 97% Ag, 1.58% oxygen, and 1.42% Mg. The FTIR, PL, DRS, PZC, TEM, and XRD results proved that Mg‐doped Ag 2 O nanoparticles were successfully doped. In this study, the first application of the synthesized Mg‐doped Ag 2 O particles was studied for the decolorization of methyl orange in an aqueous solution. At ideal conditions of dye (30 ppm), neutral pH and the dosage of catalyst (0.4 g), 96.1% of decolorization was obtained in 150 min. The degradation was first order and the activation energy was found to be 13.19 kJ/mol. The recyclability of the material was studied, and it was confirmed that the material could be reused multiple times.