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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。
Al-SBA-15 mesoporous molecular sieves were synthesized by using tetraethoxysilane as silica source, nonionic surfactant P123 as templating agent and aluminum isopropoxide as aluminum source. The physicochemical properties of the obtained materials were investigated by XRD, TEM, SEM, N2-BET and TG-DTA. The effect of Si / Al ratio on mesoscopic structure in the initial solution was analyzed. The obtained material showed strong diffraction peaks at (100), (110) and (200) in the XRD spectrum. The nitrogen adsorption-desorption curves were typical type IV with H1 hysteresis loop. The TEM analysis showed that the product had two- The hexagonal arrangement of mesoporous structure (space group p6mm), SEM results show that relatively pure silicon SBA-15, Al-SBA-15 mesoporous molecular sieve long-range order is not limited.