三维纳米层状双氢氧化物(SiO_2-LDH)的合成及影响因素探讨

Synthesis of Three-dimensional Nano-layered Double Hydroxides (SiO_2-LDH) and Discussion on Influencing Factors

采用共沉淀法合成了特殊形貌层状双氢氧化物,层间阴离子分别为硝酸根的SiO_2-NO_3-LDH和碳酸根的SiO_2-CO_3-LDH。采用透射电子显微镜和扫描电子显微镜对产物结构与形貌进行了表征,并研究了反应体系的层间阴离子、pH值、底液中二氧化硅的初始浓度、层板金属离子组成对合成的三维"红毛丹"状纳米层状双氢氧化物的形貌和结构的影响。

The special stratified dihydroxide was synthesized by coprecipitation,and the interlayer anions were SiO2-NO3-LDH of nitrate and SiO2-CO3-LDH of carbonate,respectively.The structure and morphology of the products were characterized by transmission electron microscope and scanning electron microscope.The effects of the initial concentration of silicon dioxide in the reaction system and the composition of laminar metal ions on the morphology and structure of the synthetic three-dimensional“red-haired dendrimer”-shaped bihydroxide were studied.