Synthesis of Nano-Cr/Mn Composite Metal Oxides-SBA-15 Material and Its Catalytic Performance in Aerobic Oxidations of Benzyl Alcohols

摘要

The mesoporous silica SAB-15 material and a series of nano-composite bimetal oxides-SBA-15 materials are synthesized. The oxidation of various benzyl alcohols to aromatic aldehydes has been studied using nano-composite bimetal oxides-SBA-15 materials as catalysts in air. The results indicate that the CrMnOx-SBA-15 material can promote the oxidation of benzyl alcohols to aromatic aldehydes with excellent yields smoothly. The microstructure and morphology of SBA-15 and CrMnOx-SBA-15 materials are characterized by SEM, TEM, XRD and nitrogen adsorption/desorption isotherms, respectively. In addition, the UHRTEM images, EDS image mapping, and the X-ray photoelectron spectroscopy (XPS) of CrMnOx-SBA-15 material also are characterized, which indicate the structure of the catalyst is advantageous to improve its catalytic activity.