乙二醇-水体系中球霰石CaCO3的调控合成  

Controlled Synthesis of Vaterite Calcium Carbonate in EG-H_2O System

作　　者：张敏[1] 徐云龙[1] 赵崇军[1] 钱秀珍[1] 

机构地区：[1]华东理工大学材料科学与工程学院,超细材料制备与应用教育部重点实验室,上海市先进聚合物材料重点实验室,上海200237

出　　处：《华东理工大学学报（自然科学版）》2011年第1期55-59,共5页Journal of East China University of Science and Technology

基　　金：国家863项目(2007AA02Z4B4);上海市纳米科技专项项目(0952nm06000)

摘　　要：以乙二醇(EG)-水为介质,研究了在Ca(CHCOO)2和NaHCO3体系中球霰石CaCO3(V-CaCO3)的可控合成方法。采用X射线粉末衍射仪(XRD)、透射电子显微镜(TEM)、扫描电子显微镜(SEM)对CaCO3晶型和形貌进行了表征,考察了反应温度、搅拌速率和体系中EG体积分数等合成条件对V-CaCO3生长过程和晶型结构的影响。结果表明:在乙二醇-水中较温和的条件下可合成纯相的V-CaCO3,调控温度、搅拌速率或EG体积分数等实验条件可以实现球霰石晶型CaCO3的可控生长。Controlled synthesis of vaterite calcium carbonate（V-CaCO3） in the mixture of（Ca（CH3COO）2） and NaHCO3 solutions by using ethylene glycol-H2O（EG-H2O） as solvent was investigated.The crystal form and morphology of CaCO3 were characterized by X-ray diffraction,transmission electron microscopy（TEM） and scanning electron microscopy（SEM）.The effects of reaction temperature,stirring speed and the volume fraction of EG on the growth of crystals and crystal form were observed.The results showed that V-CaCO3 was synthesized in EG-H2O system at mild temperature,and the controllable growth of V-CaCO3 was easily obtained by controlling the temperature,stirring speed and the content of EG.

关 键 词：CACO3 球霰石 乙二醇-水 粒径 

分 类 号：TQ050.421[化学工程]