【摘要】 采用一步合成法合成固体催化剂Mo-SBA-15,并将其用于催化丙烯与异丙苯过氧化氢的反应。采用N2吸附-脱附、X-射线衍射、拉曼光谱、紫外-可见光谱等手段对催化剂的结构及活性组分进行了表征。结果表明,相比于浸渍法制备的MoO3/SBA-15和溶胶凝胶法制备的MoO3/SiO2,该催化剂在丙烯与异丙苯过氧化氢的反应中显示出更高的催化活性。一步法合成的Mo-SBA-15保持了SBA-15的特征骨架结构,其中MoO3晶相的质量分数相比于MoO3/SBA-15和MoO3/SiO2分别下降了32.7%和55.3%,提高了其催化性能。更多还原

【Abstract】 One-step synthesized Mo-SBA-15 was used to catalyze the epoxidation of propylene with cumene hydroperoxide.The structure and surface Mo species were characterized by N2 adsorptiondesorption,XRD,Raman and UV-Vis spectroscopy.The results showed that compared with impregnated MoO3/SBA-15 and sol-gel MoO3/SiO2,the Mo-SBA-15 prepared by one-step method,with the crystalline MoO3 mass fraction reduction of 32.7% and 55.3%,respectively,had better catalytic performance in epoxidation of propylene.Introduction of Mo species into SBA-15 by the one-step method did not destroy the structure of SBA-15,so the better distribution of heterogeneous MoOxon silica support and better catalytic performance could be obtained.更多还原