Journal of Inorganic Materials ›› 2019, Vol. 34 ›› Issue (7): 755-760.DOI: 10.15541/jim20180472

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Synthesis of Metastable Vaterite Phase of CaCO3 via Ethanol-calcium Method and Ethanol-water Binary Solvent Method

CHEN Chuan-Jie1,WEI Li-Geng1,WU Yue1,HU Cheng-Pei1,HU Yuan-Cong1,JIANG Jiu-Xin1,2,3()   

  1. 1. Hubei Provincial Key Laboratory of Green Materials for Light Industry, Hubei University of Technology, Wuhan 430068, China
    2. Collaborative Innovation Center of Green Light-weight Materials and Processing, Hubei University of Technology, Wuhan 430068, China
    3. School of Material and Chemistry Engineering, Hubei University of Technology, Wuhan 430068, China
  • Received:2018-10-10 Revised:2018-12-03 Published:2019-07-20 Online:2019-06-26
  • Supported by:
    National Natural Science Foundation of China(51402097);Open Foundation of Collaborative Innovation Center of Green Light-weight Materials and Processing, Hubei Provincial Key Laboratory of Green Materials for Light Industry(201806B06);Training Program of Innovation and Entrepreneurship for Undergraduates(201810500098)

Abstract:

Ethanol-calcium method was proposed, and the metastable vaterite phase of CaCO3 was synthesized by this method, i.e. the complex compound between CaCl2 and ethanol reacted with Na2CO3 aqueous solution. Effects of aging time and reaction temperature on the polymorphs and morphologies of CaCO3 were investigated, and the comparative study on the synthesis of CaCO3 via ethanol-water binary solvent (EWBS) method at the same conditions was carried out. XRD results indicate that the fraction of vaterite in the product decreases with the aging time prolonging and reaction temperature increasing in both systems. However, the fraction of vaterite in the product prepared by ethanol-calcium method is much higher than that in the product prepared by EWBS method, and the stability of vaterite prepared by ethanol-calcium method is also much better. SEM observation shows that the morphologies of vaterite and calcite are their typical sphere and rhombohedra, respectively.

Key words: vaterite, calcium carbonate, ethanol-calcium, aging time, reaction temperature

CLC Number: