模板剂对合成硅铝酸盐介孔材料的影响

Effect of template agent on synthetic aluminosilicate mesoporous material

为探究模板剂在合成介孔材料过程中的关键作用,本文以偏铝酸钠和水玻璃为导向剂,采用水热法在不同模板剂条件下合成硅铝酸盐介孔材料。利用X射线衍射仪(XRD),扫描电子显微镜(SEM)以及比表面积测定仪(N2吸附/脱附)对合成样品进行表征分析,研究了模板剂种类、质量浓度及煅烧脱除模板剂温度对合成硅铝酸盐介孔材料的孔结构、形貌及性能参数的影响。研究表明,6种不同模板剂合成的硅铝酸盐介孔材料均存在明显短程有序结构,最佳模板剂为F108(PEO133-PPO50-PEO133),质量浓度为0.04 g/mL,煅烧温度550℃时合成的硅铝酸盐介孔材料的结构参数达到最优。

In order to explore the key role of templating agent in the synthesis of mesoporous materials, aluminosilicate mesoporous materials were synthesized by hydrothermal method under different templating conditions by using sodium metaaluminate and water glass as guiding agents.The synthesized samples were characterized by X-ray Diffractometry(XRD), Scanning Electron Microscopy(SEM), and specific surface area analyzer(N2 adsorption/desorption). The effects of the type and concentration of the template and the temperature of the calcining removal template on pore structure, morphology, and performance parameters of the synthesized aluminosilicate mesoporous materials were studied. The results show that the aluminosilicate mesoporous materials synthesized by the six different templating agents have obvious short-range order structure. The as-synthesized aluminosilicate mesoporous material has the best structural parameters using F108(PEO133-PPO50-PEO133) as the templating agent at a concentration of 0.04 g/mL and a calcination temperature of 550 ℃.