Why to synthesize vaterite polymorph of calcium carbonate on the cellulose matrix via sonochemistry process?

• The influences of synthesis parameters on the CaCO3 crystals were researched.
• Ultrasound agitation method favors the synthesis of vaterite spheres.
• Microcrystalline cellulose favors the synthesis of vaterite phase.
• Solvent and reactant favors the synthesis of vaterite phase.
• The mechanism of vaterite spheres was suggested.

Vaterite is an important biomedical material due to its features such as high specific surface area, high solubility, high dispersion, and small specific gravity. The purposes of this article were to explore the growth mechanism of vaterite on the cellulose matrix via sonochmistry process. In the work reported herein, the influences of experimental parameters on the polymorph of calcium carbonate were investigated in detail. The calcium carbonate crystals on the cellulose matrix were characterized by means of X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM). Experimental results revealed that all the reactants, solvent, and synthesis method played an important role in the polymorph of calcium carbonate. The pure phase of vaterite polymorph was obtained using Na2CO3 as reactant in ethylene glycol on the cellulose matrix via sonochmistry process. Based on the experimental results, one can conclude that the synthesis of vaterite polymorph is a system process.