A facile method was designed to synthesize CaCO3 particles with spindle morphology and an average diameter of 300 nmfrom CaCl2 and CO2-storage material (CO2SM), in which CO2SM was used as both CO32- source and crystal modifier to prepare CaCO3 crystals. The effects of CO2SM concentration, Ca2+ concentration, and stirring time on crystallization behavior of CaCO3 were investigated. Except of the rapid production of CaCO3 particles, the filtered solution without CaCO3 precipitate could be reused to prepare CaCO3 particles with the additional CO2 and CaCl2. In addition, a self-assembly formation mechanism of vaterite CaCO3 particles also was proposed. (C) 2016 Elsevier B.V. All rights reserved.