Ordered mesoporous molecular sieve materials, Al-SBA-15 was respectively synthesized from the strong acidic and the acid-free media by using a very small quantity of surfactants because of the economic and environmental considerations. The effects of various Al sources on the structural and acidic properties of the final materials were investigated with powder X-ray diffraction (XRD), nitrogen adsorption–desorption at 77 K, transmission electron microscopy (TEM), scanning electron microscopy (SEM), inductively coupled plasma (ICP) analyses, and chemical sorption (Py-IR). When following the acid-free strategy, a highly ordered mesostructure can be facilely constructed even with a very low surfactant concentration, extremely regardless of the kind of Al source that used. The resulting Al-SBA-15 exhibited a much higher aluminum content, a stronger acid strength and especially the predominant Brønsted acidic properties in comparison with those synthesized under the traditional strong acidic conditions, thanks to the high-quality crosslinking and self-assembly of silica and alumina species. In addition, the morphology of the product can also be modulated by simply altering the type of aluminum sources. The Al-SBA-15 synthesized with the aluminum nitrate as Al source exhibited very high catalytic activity in the Low Density Polyethylene (LDPE) cracking reaction, and the temperature corresponding to the maximum cracking rate was even comparable to the zeolitic catalyst.

出于经济和环境方面的考虑，有序介孔分子筛材料Al-SBA-15分别使用极少量的表面活性剂由强酸性和无酸介质合成。通过粉末X射线衍射（XRD），77 K下的氮吸附-脱附，透射电子显微镜（TEM），扫描电子显微镜（SEM）研究了各种铝源对最终材料的结构和酸性的影响。电感耦合等离子体（ICP）分析和化学吸附（Py-IR）。当遵循无酸策略时，即使使用非常低的表面活性剂浓度，也可以轻松构建高度有序的介观结构，而与所使用的Al源类型无关。所得的Al-SBA-15铝含量高得多，与传统强酸性条件下合成的酸强度相比，具有更强的酸强度，尤其是主要的布朗斯台德酸性，这归功于二氧化硅和氧化铝物种的高质量交联和自组装。另外，还可以通过简单地改变铝源的类型来调节产品的形态。以硝酸铝为铝源合成的Al-SBA-15在低密度聚乙烯（LDPE）裂解反应中表现出很高的催化活性，对应于最大裂解速率的温度甚至与沸石催化剂相当。得益于高质量的二氧化硅和氧化铝物种的交联和自组装。另外，还可以通过简单地改变铝源的类型来调节产品的形态。以硝酸铝为铝源合成的Al-SBA-15在低密度聚乙烯（LDPE）裂解反应中表现出很高的催化活性，对应于最大裂解速率的温度甚至与沸石催化剂相当。得益于高质量的二氧化硅和氧化铝物种的交联和自组装。另外，还可以通过简单地改变铝源的类型来调节产品的形态。以硝酸铝为铝源合成的Al-SBA-15在低密度聚乙烯（LDPE）裂解反应中表现出很高的催化活性，对应于最大裂解速率的温度甚至与沸石催化剂相当。