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BULLETIN OF THE CHINESE CERAMIC SOCIETY ›› 2025, Vol. 44 ›› Issue (1): 195-201.DOI: 10.16552/j.cnki.issn1001-1625.2024.0824

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Synthesis of Pure Vaterite Regulated by Vitamin C and Its Formation Mechanism

WU Guangwu1, BAI Rong2, FANG Hu1, ZHAO Cheng1, CHEN Peiyuan1,3   

  1. 1. School of Civil Engineering and Architecture, Anhui University of Science and Technology, Huainan 232001, China;
    2. China Construction Fourth Engineering Division Corp. Ltd., Guangzhou 510665, China;
    3. State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and Technology, Huainan 232001, China
  • Received:2024-07-18 Revised:2024-09-09 Online:2025-01-15 Published:2025-01-23

Abstract: In order to establish a process of synthesizing high purity vaterite calcium carbonate with calcium chloride as raw material and storing CO2, this paper used calcium chloride as calcium source, CO2 carbonization method and vitamin C as crystal form regulator to control the synthesis of vaterite. The products were characterized by X-ray diffractometer, Fourier transform infrared spectrometer, scanning electron microscope, etc. The effects of different concentrations of vitamin C on calcium carbonate crystals and morphology were studied, and the possible formation mechanism of vaterite under the regulation of vitamin C was discussed. The results show that vitamin C has a significant effect on stabilizing the crystalline form of vaterite. When vitamin C is not added, the product is a mixture of vaterite and calcite, while vaterite with a purity of 100% can be obtained by adding 0.1% (mass fraction) vitamin C. Moreover, with the increase of vitamin C concentration, the specific surface area of calcium carbonate increases from 3.63 m2/g to 11.62 m2/g, and the crystal size decreases from 1~3 μm to 0.3~0.6 μm. This study provides a simple, green, and low-cost method to prepare pure vaterite while safely and effectively sequestering CO2 greenhouse gases.

Key words: vaterite, vitamin C, calcium carbonate, carbon dioxide, crystal form regulator

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