Facile synthesis of vaterite core-shell microspheres

• Published in: Colloids and surfaces. A, Physicochemical and engineering aspects Vol. 374; no. 1-3; pp. 102 - 107
• Main Authors: Yang, Ming, Jin, Xiaoqi, Huang, Qiao
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier B.V 20.01.2011; Elsevier
• Subjects: Calcite; Calcium carbonate; Chemistry; Colloidal state and disperse state; Core-shell; Crystal growth; Exact sciences and technology; General and physical chemistry; Microspheres; Nanomaterials; Nanoparticles; Nanostructure; Physical and chemical studies. Granulometry. Electrokinetic phenomena; Polyelectrolyte; Polystyrene resins; Scanning electron microscopy; Sodium salts; Surface physical chemistry; Synthesis; Crystal growth; Polyelectrolyte; Core-shell; Calcium carbonate; Scanning electron microscopy; Microsphere; Hydrocarbon; Nanoparticle; Crystals; Crystallization; Calcite; X ray diffraction; Sulfonic acid; Plate; Ammonia; Precipitation; Synthesis; Adsorption; Sodium; Styrene; Benzenic compound
• ISSN: 0927-7757; 1873-4359
• DOI: 10.1016/j.colsurfa.2010.11.018

[Display omitted] ▶ Vaterite core-shell microspheres are synthesized through a facile way. ▶ Crystal phase of calcium carbonate is transferred from calcite to vaterite. ▶ Hexagonal plates are attributed to adsorption of ammonia and re-crystallization. Vaterite core-shell microspheres composed of core-nanoparticles and shell-hexagonal nanoplates are synthesized by precipitation route assisted by poly(styrene sulfonic acid) sodium salt (PSS). The as-prepared products are characterized by XRD and SEM. With the addition of PSS, the crystal phase of calcium carbonate is transferred from calcite to vaterite. The growth process of vaterite microspheres is investigated by SEM. It is supposed that the core-shell structured microspheres with the nanoparticles in core and the hexagonal plates at the outer layer are attributed to the adsorption of PSS, ammonia and the re-crystallization of the nanoparticles.