共沉淀法合成Mg-Al-类水滑石影响因素研究  

Study of the effects on synthesis Mg-Al-hydrotalcite-like compounds

作　　者：王冬青[1] 李丽芳[1] 王建伟[1] 

机构地区：[1]山东农业大学化学与材料化学学院,山东泰安271018

出　　处：《山东大学学报（理学版）》2011年第3期18-22,共5页Journal of Shandong University(Natural Science)

基　　金：山东省优秀中青年科学家科研奖励基金资助项目(2008BS07016)

摘　　要：混合共沉淀法制备类水滑石(HTlc)纳米粒子时,其粒径及粒径分布会受到多种因素的影响。本文采用正交设计法研究了Mg-Al-HTlc纳米粒子的合成,比较了胶溶时间、胶溶温度、碱用量及老化时间对晶胞参数、粒径及粒度分布的影响及作用。各因素对平均粒径影响顺序为:胶溶温度>老化时间>胶溶时间>碱用量。各因素对粒度分布影响顺序为:碱用量>胶溶温度>老化时间>胶溶时间。单分散HTlc纳米粒子最佳制备条件为:胶溶时间48 h,胶溶温度100℃,碱用量nNH3.H2O/(2n(Mg2+)+3n(Al3+))=1,老化时间45 min。The size and size distribution will be affected by many factors in the process to synthesize Mg-Al-HTlc（hydrotalcite-like compounds,HTlc） nanoparticles using the mixed co-precipitation method.Orthogonal design was used in this study to synthesize Mg-Al-HTlc nanoparticles and to estimate the factors（such as peptizing time,peptizing temperature,aging time and alkali dosage） effect on the unit cell parameters,size and size distribution in the monodispersed Mg-Al-HTlc nanopartical preparation process.The result showed that the order of factors influencing HTlc mean size was：peptizing temperature aging time peptizing time alkali dosage.The order of factors influencing HTlc size distribution was：alkali dosage peptizing temperature aging time peptizing time.The optimal condition for preparing monodispersed HTlc was：peptizing time 48 h,peptizing temperature 100 ℃,and alkali dosage n（NH3·H2O）/（2n（Mg2＋）＋3n（Al3＋））=1,aging time 45 min.

关 键 词：类水滑石 合成 纳米粒子 正交设计 

分 类 号：O648.2[理学—物理化学]