| 乙醇/水混合溶剂体系中碳酸钙晶体晶型和取向的控制 |
| Control of Crystalline Polymorphs and Orientations for Calcium Carbonate in Mixed Solvents of Ethanol and Water |
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| 摘要: 采用(NH4)2CO3分解法，制备得到了晶型和形貌可控的CaCO3晶体。研究结果表明，乙醇/水混合溶剂、陈化时间和L-半胱氨酸自组装单层模板对CaCO3晶体的晶型、取向和形貌都具有重要影响。无单层模板情况下，溶液中主要得到了球霰石，球霰石的形貌随陈化时间从花朵外形变为树叶形。同样的醇/水体系中，在自组装单层上却得到了取向为(104)晶面的方解石。这与水溶液中同一自组装单层上主要获得(001)结晶面的方解石有明显不同。方解石的形貌也随陈化时间变化而改变。陈化时间为3h时，得到具有孔洞结构的方解石；陈化时间为12h时，得到表面光滑的菱面体方解石。 |
| 关键词: 碳酸钙 乙醇/水混合溶剂 自组装单层 球霰石 方解石 |
| 基金项目: 国家自然科学基金(No.20873136)资助项目。 |
| Abstract: In the present study, the crystals of calcium carbonate were obtained by the diffusion of NH3 and CO2 into the CaCl2 solution. CaCl2 solution was prepared by dissolving CaCl2 into the mixed solvents of ethanol and water. Experimental results showed that the mixed solvents, the aging time and self-assembled monolayers (SAMs) of L-cysteine had significant influence on crystalline forms, orientations and even morphologies. Only calcite crystals were obtained on SAMs but in solution the main products were vaterite. In solution, flower-like and leaf-like vaterite were obtained depends on the aging time being3 h and 12 h, respectively. However on the templates of SAMs, calcites with quite different morphologies (from porous to smooth surfaces) were obtained when the aging time changed. |
| Keywords: calcium carbonate ethanol-water mixed solvents self-assembled monolayer vaterite calcite |
| 投稿时间：2013-11-06 修订日期：2013-12-30 |
| 摘要点击次数: 2133 |
| 全文下载次数: 1929 |
| 潘晓芳,王海水.乙醇/水混合溶剂体系中碳酸钙晶体晶型和取向的控制[J].无机化学学报,2014,30(6):1312-1316. |
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