PSSS‐controlled synthesis of CaCO3 superstructures
PSSS‐controlled synthesis of CaCO3 superstructures
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PSSS 控制的 CaCO3 超结构合成
DOI：
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
D. Ng
中科院分区：
文献类型：
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作者：
H. Tang;Jaguo Yu;D. Ng
通过使用聚（4-苯乙烯磺酸钠）（PSSS）作为结构导向剂来指导碳酸钙从水溶液中的受控沉淀，可以轻松合成复杂的 CaCO3 超结构。通过扫描电子显微镜（SEM）和粉末X射线衍射（XRD）分析对产物进行了表征。结果表明，随着溶液中PSSS浓度的增加，产物的形貌发生显着变化，从菱形颗粒到板状聚集体，再到表面光滑的球体，再到海绵状球体，最后到由板状亚单元组成的复杂球形超结构。我们假设，随着 PSSS 浓度的增加，观察到的 CaCO3 颗粒形态的连续变化可能是由于 PSSS 对 CaCO3 晶体的成核、生长和聚集的影响。讨论了不同形貌CaCO3晶体的形成机制。 （© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA，魏因海姆）
Complex CaCO3 superstructure can be easily synthesized by using poly (sodium 4‐styrenesulfonate) (PSSS) as a structure directing agent to direct the controlled precipitation of calcium carbonate from aqueous solution. The products were characterized by scanning electron microscopy (SEM), and powder X‐ray diffraction (XRD) analysis. The results revealed that the morphology of the products changed significantly with the increasing of the concentration of PSSS in solution, from rhombohedral particles to plate‐packed aggregates to spheres with smooth surface, to sponge‐like spheres and finally to complex spherical superstructure consisted of plate‐like sub‐units. We hypothesize that the observed sequential changes in morphology of CaCO3 particles with added PSSS concentration may be due to the influence of PSSS on nucleation, growth and aggregation of CaCO3 crystals. The formation mechanisms of CaCO3 crystals with different morphologies were discussed. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)