超声辅助生物法还原法制备Ag/ZrO_2及其催化研究  

Ultrasonic-assisted biosynthesis of Ag/ZrO_2 and its catalysis research

作　　者：汪静[1] 王慧[1] 景孝廉[2] 黄加乐[1] 孙道华[1] 李清彪[1,2] 

机构地区：[1]厦门大学化学化工学院化学工程与生物工程系,福建厦门361005 [2]厦门大学环境与生态学院环境科学研究中心,福建厦门361005

出　　处：《中国科技论文》2015年第6期629-632,共4页China Sciencepaper

基　　金：国家自然科学基金资助项目(21036004;21106117);高等学校博士学科点专项科研基金资助项目(20110121120018)

摘　　要：为了实现丙酮醛的经济、"绿色"规模化生产,低温条件下具有高催化性能的催化剂的研究成为关键。以芳樟叶浸出液作为还原剂,在超声辅助下,制备了用于1,2-丙二醇选择氧化制备丙酮醛的反应的Ag/ZrO2催化剂。考察了催化反应温度和催化剂制备条件对其反应性能的影响,并采用XRD、TEM、UV-vis DRS实验技术对所制备的催化剂进行了表征。实验结果表明:在银的理论负载量为9%(质量分数)、芳樟叶浸出液质量浓度为0.05g/mL、70 W功率下超声60min、450℃焙烧2.0h条件下得到的Ag/ZrO2催化剂可获得最佳催化反应性能,在340℃,1,2-丙二醇的转化率达到96.8%,丙酮醛的选择性达到73.3%。In order to produce methylglyoxal economically and environmental-friendly in a large scale,catalysts with high performance in low temperatures are of greatest importance.Ag/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 catalysts were characterized by XRD,TEM and UV-Vis DRS techniques.The results show that the optimum preparation conditions are as follows：silver loading is 9%,leachate concentration is 0.05g·mL^-1,ultrasound power is 70 W,ultrasound time is 60 min,calcination temperature is 450 ℃,calcination time is 2h.The Ag/ZrO2 catalyst prepared under above optimum conditions demonstrates good performance at 340 ℃,the conversion of 1,2-propane glycol is 96.8% and the selectivity of methyglyoxal is73.3%.

关 键 词：工业催化 超声辅助生物还原 银催化剂 1 2-丙二醇 选择氧化 

分 类 号：TQ426[化学工程]