摘要：甘氨酸存在下，分别在超纯水、CH3OH/H2O（v/v:3:2）和DMF/H2O（v/v:3:2）混合溶剂120 oC水热法合成了CaCO3晶体，用粉末XRD衍射方法对合成的晶体进行了表征，用扫描电子显微镜观察分析了生成的CaCO3晶体的形貌，研究溶剂对CaCO3晶体的晶型和形貌的影响。结果发现，在纯水中得到主要是文石晶体；在CH3OH/H2O混合溶剂中得到的是文石和球霰石的混合物；而在DMF/H2O混合溶剂中得到的是文石和方解石的混合物。
关键词: L-甘氨酸；水热；文石；方解石；球霰石
Abstract: In this paper, calcium carbonate particles were prepared by a precipitation reaction of urea with calcium acetate from mixed solution of organic solvents and water in the presence of glycine (gly) at 120°C. The as-prepared products were characterized with X-ray diffraction and FT-IR. The shapes are observed by scanning electron microscopy. The effects of different mixture solvents on the crystal shape and morphology of the as-prepared CaCO3 were investigated and discussed. The results show that organic solvents can have great influence on the shapes of CaCO3 at relative higher temperature in the presence of glycine.
Keywords: glycine; hydrothermial method; aragonite; calcite; solvent,
