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PSSS‐controlled synthesis of CaCO 3 superstructures
Author(s) -
Tang Hua,
Yu Jaguo,
Ng Dickon H. L.
Publication year - 2007
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.200710952
Subject(s) - superstructure , nucleation , scanning electron microscope , aqueous solution , calcium carbonate , chemical engineering , precipitation , morphology (biology) , spheres , chemistry , materials science , sodium carbonate , crystallography , sodium , composite material , organic chemistry , oceanography , physics , astronomy , biology , meteorology , engineering , genetics , geology
Complex CaCO 3 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 CaCO 3 particles with added PSSS concentration may be due to the influence of PSSS on nucleation, growth and aggregation of CaCO 3 crystals. The formation mechanisms of CaCO 3 crystals with different morphologies were discussed. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)