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利用固态离子交换的方法制备出FeCl_3改性的β沸石固相催化剂.采用XRD,TG-DSC及低温N_2吸附法对所制的催化剂进行了表征.用H_2O_2作氧化剂将苯催化氧化成苯酚考察了催化剂的催化活性和选择性.通过调节二甲基二乙氧基硅烷(DDS)表面的亲水基和疏水基可以阻止苯酚进一步发生氧化反应从而提高催化反应的选择性.此外,在催化剂的回收实验中发现催化剂可以重复使用3次,而其催化活性没有太大的变化.所以从催化剂的制备到催化剂的催化过程都是绿色环保的.
The solid state ion exchange method was used to prepare FeCl_3 modified β zeolite solid phase catalyst.The catalysts were characterized by XRD, TG-DSC and low temperature N_2 adsorption.The catalytic oxidation of benzene to phenol was investigated using H_2O_2 as oxidant The catalytic activity and selectivity of the catalyst can be increased by adjusting the hydrophilic and hydrophobic groups on the surface of the dimethyldiethoxysilane (DDS) to further enhance the selectivity of the catalytic reaction.Furthermore, in the catalyst recovery The experiment found that the catalyst can be reused three times, but its catalytic activity does not change much, so from the catalyst preparation to the catalytic process of the catalyst are green.