具有层状碱金属盐结构的氢氧化氨基苯甲酸锌的制备及表征

以自制的β-Zn(OH)2和氨基苯甲酸为原料,水热合成了具有层状碱金属盐(LBMS)结构的氢氧化氨基苯甲酸锌化合物。通过XRD、TG-DTA、SEM和TEM分析研究了合成产物的结构、形貌和热稳定性,探讨了合成条件对水热反应产物的影响及合成产物在有机溶剂中的剥离反应。当o-NH2C6H4COOH/Zn的摩尔比为1.2,水热温度70℃下反应12h时,得到的层状物具有板块状粒子特征,层间距为1.33nm;当m-NH2C6H4COOH/Zn的摩尔比为1.8,水热温度40℃下反应24h时,得到的层状化合物具有纤维状粒子特征,层间距为1.08nm。合成的层状物在醇溶剂中可发生剥离反应,层状氢氧化邻氨基苯甲酸锌在正丁醇中的剥离量为0.12g.L-1,层状氢氧化间氨基苯甲酸锌在乙醇中的剥离量为0.18g·L-1。

Hydrothermal synthesis and characterization of layered hydroxide zinc aminobenzoate compounds with structure of layered basic metal salts

Two types of layered hydroxide zinc aminobenzoate compounds with a basal spacing of 1.33nm and 1.08nm,and with structure of layered basic metal salts(LBMS)were prepared using β-Zn(OH)2 and aminobenzoic acid by hydrothermal reaction.XRD,TG-DTA,SEM and TEM were used to characterize the structure and particle morphology of the synthesized layered compounds.Meanwhile,the effect of the synthetic conditions on the obtained compounds and its exfoliation in different alcohol solvents were also investigated.When the molar ratio of x(o-NH2C6H4COOH/Zn)was 1.2,the temperature of 70℃ and the reaction time for 12h,the layered phase showed plate-like particle morphology with a basal spacing of 1.33nm.When the molar ratio of x(m-NH2C6H4COOH/Zn)was 1.8,the temperature of 40℃ and the reaction time for 24h,the layered phase showed strip-like particle morphology with a basal spacing of 1.08nm.Both the plate-like crystals and the strip-like crystals can all be exfoliated in alcohol solvents.The saturation concentration of the exfoliated samples were 0.12g/L for layered hydroxide zinc o-aminobenzoate compound in the n-butyl alcohol solvent and 0.18g/L for layered hydroxide zinc m-aminobenzoate compound in the alcohol solvent.