Efficacy of Cobalt-Incorporated Mesoporous Silica towards Photodegradation of Azodyes and Its Kinetic Study for Advanced Application

Along with MCM-41, cobalt-incorporated mesoporous silica (Co-MCM-41) has been created. Powder X-ray diffraction, scanning electron microscopy, and nitrogen adsorption-desorption studies were used to describe the materials. It has been discovered that the Co-MCM-41 has less surface area (SBET, m2 g−1), pore volume (cc·g−1), and pore size (Å) than the MCM-41. The SEM-EDAX analysis has also unmistakably demonstrated the existence of the appropriate elements in the materials. The photoactivity was significantly impacted by the extremely distributed Co3+ species present on the MCM-41 structure. A theoretical loading of 3.5 wt% permitted an AO7 degradation percentage of about 70% for the samples that were simply treated with Co. Increased Co3+ inactive species, such as clusters or −Co2O3 nanoparticles, are present at higher loadings, but the photoactivity is not noticeably increased. By using the Kubelka-Munk function to the UV-Vis DRS results, it was discovered that the band gap (eV) in the Co-MCM-41 was also substantially smaller than in its parent template. The Alizarin Red S dye was successfully photodegraded employing the materials as photocatalysts, and pseudo-first order kinetics was carried out using the Langmuir-Hinshelwood kinetic model. The necessary experimental setups were all optimised

A novel vanadium n-propylamino phosphate catalyst: synthesis, characterization and applications

A novel, lamellar type Vanadium n-propylamino phosphate catalyst is synthesized and characterized by using various physicochemical techniques such as Powder X-ray diffraction, Scanning electron microscopy/Energy dispersive X-ray analysis, Thermogravimetry/Differential thermal analysis, Fourier transform Infrared analysis, Electron spin resonance spectroscopy, Ultraviolet - Visible Diffuse reflectance spectroscopy, X-ray Photoelectron spectroscopy, 31P Magic angle spinning Nuclear Magnetic Resonance spectroscopy and Catalytic applications toward Octahydroquinazolinone synthesis. It is found that the n-propylamine is present as sandwich between Vanadyl phosphate layers. Most of the Vanadium is present as V4+ ions in tetrahedral co-ordination. Vanadium n-propylamino phosphate catalyses Octahydroquinazolinone synthesis more effeciently and the optimum conditions required for Octahydroquinazolinone synthesis are, Benzaldehyde (2 mmol), Dimedone (2 mmol), Urea (4 mmol), Methanol + Water (1:1, 5 mL) and Catalyst (0.05 g). A plausible mechanism is also proposed