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分别利用十六烷基三甲基溴化铵(CTAB)、正硅酸乙酯(TEOS)为模板剂和硅源,合成了高度有序的MCM-48材料。通过浸渍法制备了Ce含量不同的MCM-48(Ce-MCM-48s)材料。采用TG-DTA、小角XRD、N2吸-脱附、FT-IR、TEM、XPS和UV-vis等对Ce-MCM-48s进行了表征。XRD、N2吸-脱附和TEM证明Ce-MCM-48s具有与MCM-48相似的三维螺旋立体结构;FT-IR和XPS表明MCM-48孔道及其表面已被Ce氧化物所覆盖。可见光催化降解罗丹明B的实验证明,10%Ce-MCM-48的催化降解效率好于纯CeO2,商用TiO2(P125),5%Ce-MCM-48和15%Ce-MCM-48的。
Highly ordered MCM-48 materials were synthesized using cetyltrimethylammonium bromide (CTAB), tetraethyl orthosilicate (TEOS) as template and silicon source respectively. MCM-48 (Ce-MCM-48s) materials with different Ce contents were prepared by impregnation method. Ce-MCM-48s was characterized by TG-DTA, small angle XRD, N2sorption-desorption, FT-IR, TEM, XPS and UV- XRD, N2 adsorption-desorption and TEM showed that Ce-MCM-48s had a similar three-dimensional helical structure as MCM-48. FT-IR and XPS indicated that the MCM-48 pore and its surface were covered by Ce oxide. Visible photocatalytic degradation of rhodamine B proved that the catalytic degradation efficiency of 10% Ce-MCM-48 was better than pure CeO2, commercial TiO2 (P125), 5% Ce-MCM-48 and 15% Ce-MCM-48.