水热法制备Zn-Mg-Al花状水滑石

Hydrothermal Synthesis and Characterization of Zn-Mg-Al Hydrotalcite

摘要:

采用水热法，以尿素为沉淀剂，Zn(NO3)2、Mg(NO3)2和Al(NO3)3为原料，在120℃条件下连续反应10h后制备了Zn-Mg-Al水滑石纳米片以及由纳米片组装成的花状结构水滑石。利用XRD、FT-IR、TG-DTA、ICP和SEM分别对产物的尺寸、结构和形貌进行了分析。研究结果表明，本法合成的水滑石具有均一的花状形貌，花状晶体直径约8μm左右，构成花状结构的纳米片厚度约为100nm，花状水滑石晶体具有良好的“记忆效应”。初步阐释了花状水滑石的可能形成机理。

Abstract:

Zn-Mg-Al hydrotalcite nanoflake and Zn-Mg-Al hydrotalcite microstructure constructed by nanoflake had been synthesized via a hydrothermal condition at 120℃ for 10h with Zn(NO3)2、Al(NO3)3 and Mg(NO3)2 as reactants, using CO(NH2)2 as precipitation agent. The size, structure and morphology of as-prepared products were characterized by the XRD, FT-IR,TG-DTA,ICP and SEM, demonstrating that the as-prepared hydrotalcite has morphology of a homogeneous and regular flower-like structures with diameter of about 8μm and the measured thickness of the nanoflake is about 100nm and displayed excellent memory function. A possible formation mechanism of flower-like hydrotalcite was also discussed.