超声辅助生物还原法制备银催化剂及其催化氧化1,2-丙二醇性能研究

g/ZrO2 catalysts for the selective oxidation of 1,2-propanediol to methylglyoxal with molecular oxygen were prepared by an ultrasonic-assisted biosynthesis with cinnamomum camphoratrees extract. Influence of reaction temperature and preparation conditions of the catalysts on the catalytic activity were investigated. The catalyst was characterized by XRD, TEM and UV-Vis DRS techniques. The results showed that the optimum preparation conditions were as follows: silver loading was 9 wt%, leachate concentration was 0.05 g?mL-1, ultrasound power was 70 W, ultrasound time was 60 min,calcination temperature was 450 C, calcination time was 2 h. The Ag/ZrO2 catalyst prepared under above optimum conditions demonstrated good performance at 340 C, the conversion of 1,2-propane glycol was 96.8% and the selectivity of methyglyoxal was 73.3%.