Synthesis Of Alkaline Earth/Rare Earth Oxalate Micro/Nano-materials By Living Bi-template

In recent years, the biomimetic synthesis of nano-materials becomes more and more popular in Materials Chemistry field. Inspired by the biological concept, nano-materials were prepared by bio-template. We use alkaline earth oxalate as our research object and select corresponding biomimetic synthesis system. And we explore the synthesis of rare earth oxalate.Firstly, the crystallization and morphology control of alkaline oxalate were investigated in living template, mung bean sprouts (MBS). The result prove that the MBS has a very clearly selectivity of the polymoph of calcium oxalate. Alkaline oxalate superstructure can be readily generated in a normal condition. Some interesting morphologies including elaborate piny dendritic, flowerlike, rods were also be prepared by using SDS or EDTA as cooperation modifiers in the mineralization process. These morphologies were assembled by some elaborate substructure, just like nano-wire and featherlike crystals. The products are respectively characterized by SEM, XRD and FTIR. A new method of simultaneous synthesis of different nano-structure materials by living bi-template was given.Secondly, on the basis of the research of alkaline oxalate, we explore the synthesis of gadolinium oxalate by the same system and compare with the synthesis of alkaline oxalate, some rules of the living bi-template was discovered.Finally, the structure of MBS bi-template was investigated, and we found that the inside and outside of MBS has different structure. So the morphology of products are also different. And different morphology products can be got simultaneously. Additionally, the reaction mechanism was preliminary explored. We think that our work is benefit for the application of the synthesis of nano-materials. As calcium oxalate is the main ingredient of urine stone, our research will be helpful for the study of urine stone.