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Synthesis of hollow calcium carbonate particles by the bubble templating method
Affiliation:1. Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, Polizu 1-5, Bucharest, Romania;2. S.C. Chimcomplex S.A., Borzesti, Romania;1. Department of Physics, University of Trento, 38122 Trento, Italy;2. A.V. Shubnikov Institute of Crystallography RAS, 119333 Moscow, Russia;3. Faculty of Nano- and Biomedical Technologies, Saratov State University, 410012 Saratov, Russia;4. Max Plank Institute of Colloids and Interfaces, Potsdam, Germany;5. Institute of Nanostructures and Biosystems, Saratov State University, 410012 Saratov, Russia;6. Healthcare Research and Innovation Program (IRCS), Bruno Kessler Foundation, 38122 Trento, Italy;7. Department of Industrial Engineering, University of Trento, 38122 Trento, Italy;1. Department of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, United Kingdom;2. Department of Molecular and Clinical Pharmacology, University of Liverpool, Block H, 70 Pembroke Place, Liverpool L69 3GF, United Kingdom;1. School of Chemical Engineering and Technology, Hebei University of Technology, No.8, Guangrong Road, Hongqiao District, Tianjin 300130, China;2. Engineering Research Center of Synthetic seawater Utilization of Ministry of Education, No.8, Guangrong Road, Hongqiao District, Tianjin 300130, China;3. Hebei Collaborative Innovation Center of Modern Marine Chemical Technology, No.8, Guangrong Road, Hongqiao District, Tianjin 300130, China;4. Tianjin Key Laboratory of Chemical Process Safety, Tianjin 300130, China
Abstract:Hollow calcium carbonate (CaCO3) is a potential component in many industrial fields such as plastics, rubbers, papermaking, and drug delivery. This paper described a novel approach to synthesize hollow CaCO3 particles by using bubble as template via passing CO2 bubbles into calcium chloride (CaCl2) solution in the presence of ammonia (NH3) at 27 °C. The CO2 bubble is not only the reactive material, but also the template of hollow particles. The newly-formed primary particles attach to bubbles and form a solid shell. After filtering and drying the hollow CaCO3 particles were obtained. Physical characteristics of the precipitate were evaluated using scanning electron microscopy (SEM) and X-ray diffraction (XRD).
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