An effective heterogeneous WO3/TiO2-SiO2 catalyst for selective oxidation of cyclopentene to glutaraldehyde by H2O2

摘要: TiO2–SiO2 mixed oxide with large pore size was synthesized by the xerogel method and it then used to prepare WO3/TiO2–SiO2 catalyst an incipient wetness method. The as‐prepared sample employed as first heterogeneous in liquid‐phase cyclopentene oxidation aqueous H2O2, which exhibited higher selectivity (about 75%) glutaraldehyde (GA) and, turn, GA yield than WO3/SiO2 even tungstic acid homogeneous under same reaction conditions. amorphous WO3 phase identified active sites loss of proved be not important. lifetime determined its regeneration proposed. effects various factors on catalytic behaviors, such loading, calcination temperature, surface acidity media, were investigated discussed based characterizations including BET, XRD, XPS, FTIR, EXAFS Raman spectra etc.