白云石精制液中不同离子对碳酸钙晶须的影响

人工晶体学报 ›› 2021, Vol. 50 ›› Issue (5): 908-914.

白云石精制液中不同离子对碳酸钙晶须的影响

王东意¹, 郑强¹, 于亚杰¹, 徐少伟¹, 王禹博¹, 邓晓阳¹, 曹笑宁¹, 岳岩¹, 李雪^1,2, 刘云义^1,2

1.沈阳化工大学化学工程学院,辽宁省化工应用重点实验室,沈阳 110142;
2.辽宁精细化工协同创新中心,沈阳 110142

收稿日期:2021-01-13 出版日期:2021-05-15 发布日期:2021-06-15
通讯作者: 李雪,教授。E-mail:ltmlx@163.com
作者简介:王东意(1994—),男,安徽省人,硕士研究生。E-mail:1132019372@qq.com
基金资助:
辽宁省自然基金(2015020609);沈阳市中青年科技创新人才支持计划(RC180140);辽宁省“百千万人才工程”A类项目

Effects of Different Ions in Dolomite Refining Solution on Calcium Carbonate Whiskers

WANG Dongyi¹, ZHENG Qiang¹, YU Yajie¹, XU Shaowei¹, WANG Yubo¹, DENG Xiaoyang¹, CAO Xiaoning¹, YUE Yan¹, LI Xue^{1, 2}, LIU Yunyi^{1, 2}

1. Liaoning Key Laboratory of Chemical Application, School of Chemical Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China;
2. Liaoning Fine Chemical Collaborative Innovation Center, Shenyang 110142, China

Received:2021-01-13 Online:2021-05-15 Published:2021-06-15

摘要/Abstract

摘要： 以白云石精制液和二氧化碳为实验原料,采用气液接触法制备碳酸钙晶须。研究了杂质离子Mg²⁺、NH⁺₄和NO^-₃对碳酸钙晶须长径比和形貌的影响。采用扫描电镜(SEM)和X射线衍射仪(XRD)对样品的形貌和晶体结构进行表征。结果表明:NH⁺₄浓度在0.3 mol/L,Mg²⁺浓度在0.05 mol/L,NO^-₃浓度在0.2 mol/L的情况下碳酸钙晶须的形貌和长径比最佳,其中长径比最高可以达到25以上;最后再结合晶体生长理论,阐明了碳酸钙晶须的结晶过程和生长机理。

关键词: 白云石, 二氧化碳, 杂质离子, 气液接触法, 碳酸钙晶须, 形貌, 长径比

Abstract: Dolomite mineral deposits are abundant and widely distributed in our country.Calcium carbonate whiskers were prepared by gas-liquid contact method using dolomite refining solution and carbon dioxide as experimental raw materials. The effects of impurity ions Mg²⁺, NH⁺₄ and NO^-₃ on the aspect ratio and morphology of calcium carbonate whiskers were studied. Morphology and phase structure of the products were characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD). The results show that the morphology and aspect ratio of calcium carbonate whiskers are the best when the concentration of NH⁺₄ is 0.3 mol/L, the concentration of Mg²⁺ is 0.05 mol/L, and the concentration of NO^-₃is 0.2 mol/L, the aspect ratio reaches above 25 at the highest. Finally, the crystallization process and growth mechanism of calcium carbonate whiskers are explained by combining with crystal growth theory.

Key words: dolomite, carbon dioxide, impurity ion, gas-liquid contact method, calcium carbonate whisker, morphology, aspect ratio

中图分类号:

王东意, 郑强, 于亚杰, 徐少伟, 王禹博, 邓晓阳, 曹笑宁, 岳岩, 李雪, 刘云义. 白云石精制液中不同离子对碳酸钙晶须的影响[J]. 人工晶体学报, 2021, 50(5): 908-914.

WANG Dongyi, ZHENG Qiang, YU Yajie, XU Shaowei, WANG Yubo, DENG Xiaoyang, CAO Xiaoning, YUE Yan, LI Xue, LIU Yunyi. Effects of Different Ions in Dolomite Refining Solution on Calcium Carbonate Whiskers[J]. JOURNAL OF SYNTHETIC CRYSTALS, 2021, 50(5): 908-914.

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