谷氨酸柱撑类水滑石的合成及其生长机制

 以MgCl₂·6H₂O,AlCl₃·6H₂O、谷氨酸为原料，NaOH为沉淀剂，采用乙二醇－水热法合成了六方状谷氨酸柱撑类水滑石，样品采用XRD、SEM、TG－DAT、红外、N2吸附－解吸的表征进行了物相、晶体形貌结构、热分析和比表面分析，结果表明采用乙二醇-水热法可获得晶形好、板层结构显著的谷氨酸柱撑类水滑石。文章运用负离子配位多面体生长模型讨论了谷氨酸柱撑类水滑石生长形态及其生长机制，结果发现谷氨酸柱撑类水滑石生长机制符合该模型机制，其生长形态为生长基元先叠合为金属板层，然后板层再吸附谷氨酸根及H2O组成规整的层状结构化合物，乙二醇在其中起了重要的“桥连”作用。

Synthesis and Growth Mechanism of the HTlc-glutamate

A hexagonal HTlc-glutamate was assembled via glycol-hydrothermal using MgCl₂·6H₂O,AlCl₃·6H₂O,glutamic acid as raw material and sodium hydroxide as precipitator. Samples were characterized by X-ray diffraction(XRD)，scan electron microscope(SEM)，IR，thenna1 analysis (TG DTA) and BET-N₂ surface area measurements．The result indicated that HTlc-glutamate exhibited well-defined shape and obvious intercalated structure during the glycol-hydrothermal process. From the point of the model of anion coordination polyhedron growth units，the growth mechanism and morphology of the HTlc-glutamate was also studied. The result indicated that the growth morphology of HTlc-glutamate was consistent with the model. The HTlc-glutamate growth process included ① growth units incorporated to metal layers first, ② metal layers adsorbed glutamate and H₂O, ③ growth units incorporated to layer compounds according. As a result, glycol played important role in bridging.