Rational Design and Fabrication of Novel MnSeO3/GO Nanocomposites for Catalysis Applications: Analysis of Degradation Efficacy, Stability and Degradation Pathway

The MnSeO3/GO nanocomposites were effectively synthesized using a hydrothermal technique. The structural analyses of the heterogeneous catalyst were validated through the utilization of diverse characterization techniques, including X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), transmission electron microscopy (TEM), ultraviolet-visible diffuse reflectance spectroscopy (UV-DRS), and energy-dispersive X-ray spectroscopy (EDX) investigations. The surface of graphene oxide (GO) exhibits well-aggregated MnSeO3 particles, as shown by the utilization of analytical techniques such as FT-IR,EDX, and SEM. The structural characteristic of the sample demonstrated a satisfactory synthesis process, resulting in well-formed crystals and high purity of the final products. The results of the morphological study suggest that MnSeO(3)nanorods are formed, characterized by the presence of small particles on their surface. Simultaneously, the formation of GO nanosheets exhibiting pronounced aggregation occurred, potentially attributed to the influence of van der Waals forces. The optical properties of different samples were determined and the values are 2.06 eV for MnSeO3 and 1.81 eV for MnSeO3/GO. The photodegradation process of antibiotic drug Cefuroxime (CEF) and pesticide Methyl parathion (MP) was investigated using UV-visible spectroscopy, with the involvement of MnSeO3/GO nanocomposites. The results demonstrate a photocatalytic activity over 90 % during a time frame of 50 and 60 min under visible light exposure for CEF and MP degradation. In the field of scavenger research, the hydroxide radical assumes a prominent role in the mechanism of photodegradation. In addition, the stability of the photocatalyst were determined by recycle analysis. The analysis of the intermediates resulting from photocatalytic degradation was conducted by GC-MS investigations.