3-巯基丙酸自组装单层控制碳酸钙晶型及形貌的研究  

Control of Crystalline Forms and Morphologies for CaCO_3 Crystals on 3-Mercaptopropionic Acid Self-assembled Monolayers

作　　者：张素[1] 王海水[1] 

机构地区：[1]华南理工大学化学与化工学院,广州510640

出　　处：《无机化学学报》2013年第1期31-35,共5页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.20873136)资助项目

摘　　要：采用碳酸铵分解产生的NH3和CO2扩散并溶入氯化钙溶液中,得到了碳酸钙晶体。研究结果表明,3-巯基丙酸自组装单层和溶液温度对碳酸钙晶体的晶型和形貌具有重要影响。25℃条件下,纯溶液中得到了方解石,文石和球霰石三种晶型的混合沉淀物,而在自组装单层存在条件下只得到了表面光滑的菱面体方解石。改变温度,自组装单层调控得到的方解石晶体具有不同的形貌。在60℃得到了多孔方解石,与25℃时典型菱面体方解石有重要区别。XRD分析表明自组装膜上所得碳酸钙晶体为沿着(104)和(006)晶面取向生长的方解石。In the present study, the crystals of CaCO3 were obtained by the slow diffusion of NH3 and CO2 into the CaC12 solutions. Experimental results showed that both 3-mercaptopropionic acid self-assembled monolayers （SAMs） and solution temperature have significant influence on the crystalline forms and morphologies of calcium carbonates crystals. The precipitations of calcium carbonate were easily obtained from solutions at 25 ℃ but with polymorphism including calcite, vaterite and aragonite, while on the self-assembled monolayers there exist calcite crystals only. The morphologies of calcite crystals can be mediated by temperature. For example, the calcite precipitated at 25 ℃ has smooth surface while that precipitated at ＇60 ℃ has porous structure even though they were obtained on the same SAMs. XRD analysis showed that the growth of calcite on SAMs were along （104） and （006） planes.

关 键 词：碳酸钙 生物矿化 3-巯基丙酸 自组装单层 方解石 

分 类 号：O614.23[理学—无机化学]