谷氨酸柱撑类水滑石的合成及其生长机制  

Synthesis and Growth Mechanism of the HTlc-glutamate

作　　者：吴健松[1] 梁海群 林志仙[3] 

机构地区：[1]湛江师范学院化学科学与技术学院,广东湛江524048 [2]广东省高州市第一中学,广东高州525200 [3]湛江师范学院生物科学与技术学院,广东湛江524048

出　　处：《中山大学学报（自然科学版）》2013年第1期77-82,共6页Acta Scientiarum Naturalium Universitatis Sunyatseni

基　　金：国家自然科学基金资助项目(40776071;40976074)

摘　　要：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、N2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H2O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。A hexagonal HTlc-glutamate was assembled via glycol-hydrothermal using MgC12 6H20, A1C13 6H20, glutamic acid as raw material and sodium hydroxide as precipitator. Samples were char- acterized by X-ray diffraction （XRD）, scan electron microscope （SEM）, IR, thennal 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 growth units incorporated to metal layers first, metal layers adsorbed glutamate and H20, growth units incorporated to layer compounds according. As a result, glycol played important role in bridging.

关 键 词：负离子配位多面体生长模型 镁铝类水滑石 生长基元 生长形态 

分 类 号：O784[理学—晶体学]