Polymeric graphitic carbon nitride (g‐C3N4) supported CuBr2 hybrid material (CuBr2@g‐C3N4) was developed by impregnation of CuBr2 on g‐C3N4 sheets. The morphology and physiochemical properties were analyzed by powder XRD, SEM, and HRTEM studies. The hybrid CuBr2@g‐C3N4 material showed excellent selectivity in the aerobic oxidation of primary/secondary alcohols and benzoins to the corresponding carbonyl compounds in absence of any oxidizing agents. Further, CuBr2@g‐C3N4 demonstrated direct oxidation of toluene derivatives to corresponding aldehydes in excellent yields. The g‐C3N4 support provides excellent stability and heterogeneity to CuBr2 and was recovered simply by filtration and reused for ten times without appreciable loss in catalytic activity.
Cerium oxide synthesis (CeO2) nanoparticles were studied using a new and simple, eco-friendly process. The cerium oxide nanoparticles are synthesized with precursors of ammonium cerium nitrate and sodium hydroxide. Their chemical and physical properties are characterized by energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), Fourier transforming infrared spectroscopy (FTIR), and UV-Vis spectrophotometer scanning electron microscopy (SEM), high-resolution electron transmission microscopy (HRTEM). XRD analysis indicated the cubic structure of the nanoparticles containing cerium oxide. The standard particle size of CeO2 was determined at 30 nm using HR-TEM and XRD. SEM determine the surface morphology of biosynthesized cerium oxide nanoparticles. A Ce-O stretching mode was defined by the strong peaks in the FTIR range, and the peak of UV-Vis range absorbance revealed the 3.26 eV band energy difference.
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