利用固态离子交换的方法制备出FeCl3改性的β沸石固相催化剂。采用XRD, TG-DSC及低温N2吸附法对所制的催化剂进行了表征。用H2 O2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。%FeCl3 modified β zeolite catalyst was prepared by using a convenient solid-state ion exchange instead of a traditional ion exchange and characterized by XRD, TG-DSC, and low temperature N2 adsorption methods. The catalyst is active and selective for the direct hydroxylation of benzene to phe-nol with hydrogen peroxide ( H2 O2 ) . And its phenol selectivity can be further improved through tailoring its surface hydrophobicity/hydrophilicity with dimethyldiethoxysilane ( DDS) to restrain the sequent oxi-dation of phenol. In addition, it can be recovered and reused for three times with little loss of reactivity. Hence , an overall green process from the preparation of the catalyst to its application in catalytic reaction has been establised here.
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