加压碳酸化法制备片状纳米碳酸钙及其表征

doi:10.11896/cldb.21110049

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Abstract With calcium hydroxide and carbon dioxide as raw materials, trisodium citrate dihydrate as crystal control agents and ethanol as co-surfactant, flake-like calcium carbonate were successful prepared by pressurized carbonation. The morphology and structure of the samples were characterized by FESEM, XRD, FTIR, AFM, etc. And the influences of calcium carbonate morphology are investigated by changing the amount of adding trisodium citrate dehydrate and ethanol, the reaction temperature, the pressure of the CO₂, etc. The results showed that under the conditions of reaction temperature of 100 ℃, sodium citrate content of 8%, ethanol content of 10 mL and CO₂ pressure of 1.5 MPa, flake-like nano calcium carbonate with thickness of about 7—8 nm, width of about 3.5 μm, length of about 25 μm and length to width ratio of about 7∶1 was successfully prepared, and the products were of uniform sizes and relatively regular morphologies. The crystalline form of flake-like calcium carbonate was calcite, and the specific surface area was about 27.11 m²·g^-1. Pressurized carbonation increased the solubility of CO₂ in solution, and under the action of trisodium citrate, flake-like nano calcium carbonate was directionally formed.

Key words： words pressurize carbonation flake-like calcium carbonate trisodium citrate dihydrate bubbling

Published: 10 September 2023 Online: 2023-09-05

CLC number:

TQ13

Fund:Guangxi Calcium-based Materials Collaborative Innovation Center Project(CZNF-JSZX20-03) and Guangxi Calcium Carbonate Industrialization Engineering Institute Company-level Scientific Research Project(TSGGCY-201907001).

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	Articles by authors
	TANG Yong
	TANG Mingde
	JIAO Yanhui
	GUO Yaning
	WEI Deen
	TONG Zhangfa
	LI Lishuo

Cite this article:

TANG Yong,TANG Mingde,JIAO Yanhui, et al. Preparation and Characterization of Flake-like Nano Calcium Carbonate by Pressurized Carbonation[J]. Materials Reports, 2023, 37(17): 21110049-7.

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http://www.mater-rep.com/EN/10.11896/cldb.21110049 OR http://www.mater-rep.com/EN/Y2023/V37/I17/21110049

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