Al-SBA-15有序介孔材料的光化学合成与表征  

Photochemical synthesis and characterization of Al-SBA-15 ordered mesoporous materials

作　　者：潘哲[1] PAN Zhe(Department of Biology and Architecture Engineering, Baoji Vocational Technology College)

机构地区：[1]宝鸡职业技术学院生物与建筑工程学院,陕西宝鸡721013

出　　处：《化学工程师》2019年第3期13-16,共4页Chemical Engineer

基　　金：陕西省教育厅专项科研计划项目(16JK2003)

摘　　要：以三嵌共聚物PEG-PPG-PEG(P-123)为模板剂,正硅酸四乙酯为硅源,硫酸铝为铝源,通过光化学法合成了Al-SBA-15有序介孔材料。利用XRD、SEM、N_2物理吸附与化学吸附等对Al-SBA-15介孔材料进行了表征分析。研究了硫酸铝的加入量对SBA-15介孔材料的有序度、表面形貌、铝掺杂量和固体酸量等的影响。结果表明:光化学法合成了铝掺杂的SBA-15,随着硫酸铝加入量的增加,SBA-15的二维六方介观结构被逐渐破坏;当投料比Si/Al为5时,所得Al-SBA-15的介孔结构保持完好,骨架结构中Si/Al为16.5,产生了酸性活性位点,比表面积达到(693±5)m^2·g^(-1)。Mesoporous materials SBA-15 had been synthesized through photochemical synthesis by using triblock copolymer P123 as the template, tetraethyl orthosilicate as the silicon source and aluminum sulfate as the a-luminum source. The paper studied the effects of the substitution of aluminum sulfate on crystalline, surface morphology, specific surface area and solid acid of SBA-15 mesoporous materialsin the two different synthesis routes.The Al-SBA-15 mesoporous materials were characterized by X-ray powder diffraction, scanning electron microscopy, EDS spectroscopy, N2 physisorption and chemical adsorption. The results showed that the doping of Al into the framework of SBA-15 had been achieved. With the addition of aluminum sulfate, the 2-D hexagonal structure of SBA-15 was gradually destroyed. When the feeding ratio Si/Al was 5, the mesoporous structure of the obtained Al-SBA-15 remained intact, and the Si/Al in the framework was 16.5, resulting in acidic active sites, and the specific surface area reached(693±5)m^2·g^-1.

关 键 词：光化学法 铝掺杂 SBA-15 介孔材料 

分 类 号：O643[理学—物理化学]