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Synthesis of CaCO 3 nanoparticles by controlled precipitation of saturated carbonate and calcium nitrate aqueous solutions
Author(s) -
BabouKammoe Romuald,
Hamoudi Safia,
Larachi Faïçal,
Belkacemi Khaled
Publication year - 2012
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.20673
Subject(s) - calcium carbonate , aragonite , particle size , calcite , aqueous solution , nanoparticle , precipitation , thermogravimetric analysis , carbonate ion , calcium nitrate , inorganic chemistry , carbonate , sodium carbonate , mineralogy , chemical engineering , particle (ecology) , chemistry , calcium , materials science , nuclear chemistry , sodium , nanotechnology , geology , organic chemistry , physics , oceanography , meteorology , engineering
Abstract Calcium carbonate nanoparticles (CCNP) were synthesised by precipitation from saturated sodium carbonate and calcium nitrate aqueous solutions. The effect of agitation rate, mixing time, calcium/carbonate ions concentration and temperature on particle size and morphology were investigated. Particles were characterised using X‐ray diffraction (XRD), transmission electron microscopy (TEM) and thermogravimetric analysis (TGA). Increasing the mixing time from 30 to 180 min resulted in a decrease in particles size. Mixing rate variation between 300 and 14 000 rpm decreased the particle size. Temperature increase favoured a significant growth in particle size and in the formation of aragonite beginning from 80°C. Calcium and carbonate ion concentrations are key parameters controlling the CCNP particle size. Calcite is the main polymorph obtained as revealed by XRD analysis. © 2011 Canadian Society for Chemical Engineering