以正硅酸乙酯为硅源,非离子表面活性剂P123为模板剂,异丙醇铝为铝源,在磷酸介质中合成出了Al-SBA-15介孔分子筛.采用XRD、TEM、SEM、N2 -BET、TG-DTA等表征手段,考察了所得材料的物化性能.分析了初始溶液中硅铝比对介观结构的影响.所得材料在XRD谱图中(100)、(110)和(200)处出现较强衍射峰,氮气吸-脱附曲线为典型的Ⅳ型且有H1滞后环,结合TEM分析表明产物具有二维六方排列的介孔结构(空间群为p6mm),SEM结果表明相对纯硅SBA-15,Al-SBA-15介孔分子筛长程有序性没有受到限制.
Using tetraethyl orthosilicate as silica source,non-ionic surfactant P123 as template and aluminum isopropoxide as aluminum source,Al-SBA-15 mesoporous molecular sieves were obtained in the presence of phosphoric acid.By means of XRD,TEM,SEM,N2-BET,TG-DTA techniques,the properties of the samples were characterized.The effect of the molar ratio of Si/Al in the starting reactant solution on the mesoporous structure was investigated.The materials exhibited strong reflection peaks at (100),(110) and (200) reflection lines.N2 adsorption-desorption isotherms were typical Ⅳ type with a H1 hysteresis loop.XRD and TEM results showed that the samples possessed 2D hexagonal symmetry (p6mm) mesostructure.SEM images revealed that Al-SBA-15 hold the long range ordering mesoporous structure compared with pure silica SBA-15.
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