L-天冬氨酸诱导叠层碳酸钙微晶的形成

Laminated Structure Control of CaCO_3 Micro-crystal by L-aspartic Acid

利用气相扩散的方法得到一种特殊形貌的碳酸钙层状聚集体。探讨了L-天冬氨酸的浓度、反应时间对碳酸钙的形貌和晶型的影响。采用扫描电镜(SEM)、X射线粉末衍射(XRD)及红外吸收光谱(FT-IR)对合成出的样品的形貌、结构进行了表征。结果表明:L-天冬氨酸的浓度及反应时间对碳酸钙的形貌和晶型有着重要的影响,并对L-天冬氨酸浓度影响碳酸钙的形貌和晶型的机理进行了解释。

High ordered CaCO3 multilayer-stacking assemblies were easily synthesized by a gaseous diffusion route.Scanning electron microscopy （SEM）,powder X-ray diffraction （XRD）,Fourier transform infrared spectroscopy （FT-IR） were employed to characterize the samples.Results indicate that the concentration of L-aspartic acid and reaction time have great influence on both the morphology and crystal phase of the produced CaCO3.The mechanism of L-aspartic acid concentration how to affect the morphology and crystal of calcium carbonate was tentatively explained.