将微生物还原法制备银纳米颗粒的技术引入到催化剂的制备当中,以毕赤酵母菌体干粉作为还原剂制备纳米银粉,采用溶胶负载法将银负载获得Ag/zrO2催化剂,利用TEM、Xrd、uV-VIS drS等方法对催化剂进行了表征,并将所制备的催化剂用于1,2-丙二醇选择氧化制备丙酮醛的反应中。研究表明,在1,2-丙二醇的空速为5.2 H-1,反应温度340℃时,450℃下焙烧的银负载量为8%的Ag/zrO2催化剂获得了最佳的催化反应性能,1,2-丙二醇的转化率达到96.8%,丙酮醛的选择性达到78.3%。Ag/ZrO2 catalysts for the selective oxidation of 1,2-propanediol to methylglyoxal with molecular oxygen were prepared by an immobilization method based on the microorganism-mediated biosynthesis process with Pichia pastoris.The catalyst was characterized by XRD, TEM, UV-Vis DRS and TG techniques.The effects of reaction conditions(temperature and space velocity), Ag loading amount and calcination temperature of the as-produced Ag/ZrO2 catalysts on the catalytic performance were investigated.And the results showed that the 8% Ag/ZrO2 catalyst calcined at 450℃ exhibited the best catalytic activity with 96.8% 1,2-propanediol conversion and 78.3% methylglyoxal selectivity.稀贵金属综合利用新技术国家重点实验室开放课题(SKL-SMP-201210
