Sadasivan Rajesh, Patel Anjali
Polyoxometalates & Catalysis Laboratory, Department of Chemistry, Faculty of Science, The Maharaja Sayajirao University of Baroda Vadooara Gujarat India
RSC Adv. 2019 Sep 3;9(48):27755-27767. doi: 10.1039/c9ra04892h.
A heterogeneous catalyst comprising mono-copper substituted phosphotungstate and hydrous zirconia was synthesized using wet impregnation method, characterized by various physico-chemical techniques and evaluated for solvent-free oxidation of styrene using TBHP as oxidant. Various reaction parameters like time, catalyst amount, amount of TBHP and temperature were optimized with focus on optimum selectivity of styrene-oxide. Further, the catalytic activity was compared with that of unfunctionalized PWCu to understand the role of the support. Finally, the role of each component of the reaction was clearly elucidated by a detailed kinetic study of the reaction using both the catalysts.
采用湿浸渍法合成了一种包含单铜取代磷钨酸盐和水合氧化锆的多相催化剂，通过各种物理化学技术对其进行了表征，并以叔丁基过氧化氢（TBHP）为氧化剂，对苯乙烯的无溶剂氧化反应进行了评估。对时间、催化剂量、TBHP用量和温度等各种反应参数进行了优化，重点是氧化苯乙烯的最佳选择性。此外，将催化活性与未官能化的磷钨酸铜进行了比较，以了解载体的作用。最后，通过使用这两种催化剂对反应进行详细的动力学研究，明确阐明了反应各组分的作用。
