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利用中性伯胺(十二胺)作模板剂 ,合成了过渡金属Ti取代的HMS中孔材料。XRD和FT -IR表征表明Ti能有效地嵌入HMS骨架壁中而不会造成其中孔有序度的下降。钛在HMS中的嵌入量是随合成原料Ti/Si的增加而上升的 ,最高可达1.61mmolTi.g-1 HMS。IR中960cm-1 带强度与钛嵌入量呈正比 ,这可能表明960cm -1 是由钛嵌入中孔骨架而引起硅氧四面体结构发生畸变所致。催化实验结果表明 :Ti-HMS能有效地催化叔丁基过氧化氢(TBHP)氧化苯乙烯生成环氧苯乙烷(65 %～86 %)、苯乙醛(6 %～15 %)和苯甲醛(8 %～20%) ,且能重复使用数次而不失活 ,此外催化剂的制备条件和反应条件对其活性和产物分布也有不同程度的影响
Using neutral primary amine (dodecylamine) as templating agent, a transition metal Ti-substituted HMS mesoporous material was synthesized. XRD and FT-IR characterization indicated that Ti could be effectively embedded into the HMS framework without decreasing the degree of pore ordering. The amount of titanium embedded in HMS increased with the increase of Ti / Si, up to 1.61 mmol Ti.g-1 HMS. The intensity of 960cm-1 in IR is proportional to the amount of titanium embedded, which may indicate that the 960cm-1 is due to the distortion of the Si-Si tetrahedral structure caused by the insertion of titanium into the mesoporous framework. The results of catalytic experiments show that Ti-HMS can effectively catalyze the oxidation of styrene by tert-butyl hydroperoxide (TBHP) to form styrene oxide (65% ~ 86%), benzene acetaldehyde (6% ~ 15% Formaldehyde (8% ~ 20%), and can be reused several times without deactivation, in addition to the catalyst preparation conditions and reaction conditions on the activity and product distribution also have varying degrees of impact