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中文摘要：
通过共沉淀法制备了一系列Mg基复合金属氧化物，采用X射线衍射（XRD）、热重（TG）以及N2吸附（BET）等表征手段对催化剂的结构进行了表征，并研究了其对双氧水体系中环己酮Baeyer-Villiger氧化制己内酯的催化反应性能，考察了不同组成和配比的催化剂以及反应条件对催化活性的影响．结果表明，在以H2O2水溶液为氧化剂，苯甲腈和二氧六环混合溶液为溶剂时，复合金属氧化物MgO／SnO2体现出比MgO／La2O3，MgO／TiO，MgO／ZnO，MgO／ZrO2等催化剂更优异的催化性能．同时发现金属物质的量比为7：3，焙烧温度为600℃的MgO／SnO2催化剂在优选反应条件下可使环己酮的最高转化率达90．5％，己内酯的选择性达到100％．
英文摘要：
A series of Mg-based catalysts were prepared by a coprecipitation method and characterized by XRD, BET, and TG-DTA. As compared with other composite catalysts, including MgO/Al2O3, MgO/La2O3, MgO/TiO2, MgO/ZnO and MgO/ZrO2, MgO/SnO2 showed the most efficient catalytic performance in the Baeyer-Villiger oxidation of cyclohexanone to e-caprolactone with aqueous hydrogen peroxide as an oxidant. Under optimal reaction conditions, the as-prepared MgO/SnO2 catalyst after being calcined at 600 ℃ with the Mg/Sn molar ratio of 7 ： 3 presented an excellent performance with the cyclohexanone conversion of 90.5% and the caprolactone selectivity of 100%.
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