通过直接水热合成法在吡咯烷和四甲基氢氧化铵双模板剂体系下制备出具有层状薄片组成的球形镁碱沸石,并且考察了四甲基氢氧化铵加入量对镁碱沸石的结晶度、晶化曲线、晶体形貌、比表面和孔结构的影响,采用X射线衍射(XRD)、扫描电镜(SEM)、氮气吸附脱附等手段对合成样品进行分析表征.结果表明:随着四甲基氢氧化铵加入量的增加,其晶化过程逐渐延长,但最终得到的镁碱沸石相对结晶度无明显变化;四甲基氢氧化铵的加入可以显著改变镁碱沸石的晶体形貌、比表面和孔结构.
Hierarchical ferrierite (FER) assemblies with a ball-shaped morphology were synthesized successfully employing pyrrolidine and tetramethlammonium hydroxide (TMAOH) as cooperative structure directing agents.The effect of the amounts of TMAOH on the crystallization, crystallization curve, morphology and textural properties of the products were investigated.The products were characterized by X-ray diffraction, scanning electron microscopy and N2 adsorption/desorption.The results show that the more the TMAOH, the longer the crystallization process is, but the reletive crystallization are always similar.When TMAOH was adding to the gel, the products not only have a significant change of morphology (from plant-like to ball-shaped) but also a more mesopore volume, higher hierarchical factor.
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