维生素C调控合成纯球霰石及其形成机理  

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

作　　者：吴广武 白蓉[2] 方虎 赵成 陈佩圆 WU Guangwu;BAI Rong;FANG Hu;ZHAO Cheng;CHEN Peiyuan(School of Civil Engineering and Architecture,Anhui University of Science and Technology,Huainan 232001,China;China Construction Fourth Engineering Division Corp.Ltd.,Guangzhou 510665,China;State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines,Anhui University of Science and Technology,Huainan 232001,China)

机构地区：[1]安徽理工大学土木建筑学院,淮南232001 [2]中国建筑第四工程局有限公司,广州510665 [3]安徽理工大学深部煤矿采动响应与灾害防控国家重点实验室,淮南232001

出　　处：《硅酸盐通报》2025年第1期195-201,242,共8页Bulletin of the Chinese Ceramic Society

基　　金：安徽理工大学高层次人才科研基金(2022yjrc27);安徽省住房城乡建设科技计划项目(2022-YF071)。

摘　　要：为建立一种以氯化钙为原料合成高纯度球霰石型碳酸钙并封存CO_(2)的工艺,本文采用氯化钙为钙源,使用CO_(2)碳化法,维生素C为晶型调控剂调控合成球霰石。利用X射线衍射仪、傅里叶变换红外光谱仪、扫描电子显微镜等对产物进行表征,研究不同维生素C浓度对制备碳酸钙晶型和形貌的影响,并探讨在维生素C调控下球霰石可能的形成机理。结果表明:维生素C对稳定球霰石多晶型的效果显著,未加入维生素C时,产物为球霰石与方解石的混合物,添加质量分数0.1%的维生素C即可得到纯度为100%的球霰石。此外,随着维生素C浓度增加,碳酸钙比表面积由3.63 m^(2)/g提高到11.62 m^(2)/g,晶体粒径由1~3μm减小到0.3~0.6μm。本研究提供了一种简便、绿色、低成本制备纯球霰石的方法,同时可以安全有效地封存CO_(2)温室气体。In order to establish a process of synthesizing high purity vaterite calcium carbonate with calcium chloride as raw material and storing CO_(2),this paper used calcium chloride as calcium source,CO_(2)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 m^(2)/g to 11.62 m^(2)/g,and the crystal size decreases from 1~3μm to 0.3~0.6μm.This study provides a simple,green,and low-cost method to prepare pure vaterite while safely and effectively sequestering CO_(2)greenhouse gases.

关 键 词：球霰石 维生素C 碳酸钙 二氧化碳 晶型调控剂 

分 类 号：TQ132.3[化学工程—无机化工]