Luo Xianping, Song Xuewen, Cao Yuwei, Song Lei, Bu Xianzhong
College of Material Science and Engineering, Xian University of Architecture and Technology Xian 710055 China
School of Resources Engineering, Xian University of Architecture and Technology Xian 710055 China.
RSC Adv. 2020 Mar 2;10(13):7976-7986. doi: 10.1039/c9ra10460g. eCollection 2020 Feb 18.
The aim of this work is to study the effect of reaction conditions using steamed ammonia liquid waste without the use of additives on the crystallization of calcium carbonate. CaCO was prepared by steamed ammonia liquid waste (CaCl) and (NH)CO solution. The produced crystals were characterized by scanning electron microscopy (SEM), Fourier transform infrared spectrometry (FTIR) and X-ray diffraction (XRD). We have investigated the effect of the concentration of reactants, stirring speed, Ca : CO ratio, aging time and adding mode on the particle size and size distribution, final morphology and polymorph of calcium carbonate crystals during precipitation. The influence of concentration of reactants, stirring speed, Ca : CO ratio, aging time and adding mode on the morphology, size and polymorph of CaCO particles and possible formation mechanism were discussed. The exploration provides the possibility for large-scale synthesis of CaCO materials with controllable morphology and crystallographic structure by steamed ammonia liquid waste without use of additives at room temperature.
这项工作的目的是研究在不使用添加剂的情况下，利用蒸氨废液的反应条件对碳酸钙结晶的影响。通过蒸氨废液（CaCl）和（NH）CO溶液制备碳酸钙。采用扫描电子显微镜（SEM）、傅里叶变换红外光谱（FTIR）和X射线衍射（XRD）对所制备的晶体进行表征。我们研究了反应物浓度、搅拌速度、Ca∶CO比、陈化时间和添加方式对沉淀过程中碳酸钙晶体的粒径和粒径分布、最终形态及多晶型的影响。讨论了反应物浓度、搅拌速度、Ca∶CO比、陈化时间和添加方式对碳酸钙颗粒形态、尺寸和多晶型的影响以及可能的形成机理。该探索为在室温下不使用添加剂利用蒸氨废液大规模合成具有可控形态和晶体结构的碳酸钙材料提供了可能性。
