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Facile synthesis of CaCO_3 and investigation on structural and optical properties of high purity crystalline calcite

机译：CaCO_3的简便合成及高纯度方解石晶体结构和光学性质的研究

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摘要

Crystalline calcium carbonate (CaCO3) is an inorganic substance readily available and able to be produced artificially. The widespread applications to industries especially as a filler has increased the need for further research on its properties and behavior. Crystalline CaCO3 may also provide a route to hydroxyapatite with biomedical applications. The physicochemical properties of CaCO3 can be manipulated via different preparation methods. This study focusses on a precipitation method to synthesize CaCO3. Calcium chloride (CaCl2) and ammonium carbonate (NH4CO3) were used for the synthesis in different concentrations ranging from 0.05 M to 1.0 M. Elemental and particle analysis were done to describe the resulting products structurally and phase identification. Elemental analysis was undertaken by X-Ray diffraction (XRD), Fourier transform infrared Spectroscopy (FT-IR), Raman Spectroscopy and Energy Dispersive X-Ray Analysis (ED-X). From elemental analysis, it was confirmed that the resulting product was calcite micro-particles. Further analysis was done on particle and crystallite sizes by Nano-Particle Sizer, XRD and FE-SEM micrograph. It was deduced from the aforementioned analysis, the smallest crystallite size measured by Scherrer equation is 85.71 nm obtained by precipitation CaCO3 at 0.5 M concentration. This also tallied with the smallest particle size measured by FESEM micrograph showing the smallest margin of particles with size 783 nm. Optical characteristic of CaCO3 was described by ultra-violet spectroscopy (UV-vis) showing UV was absorbed in UV-C range. This study is also informative by presenting calculated absorption coefficient 0.1154 M-1 cm(-1). Recent studies on CaCO3 precipitation method have rarely reported its absorption coefficient: hence this information is useful. It was concluded that the optimal concentration for CaCO3 precipitation is within the range of 0.1 M-0.5 M. Synthesized CaCO3 crystalline are all = 1000 nm. This study has demonstrated that the precipitation method is able to produce calcite in the micrometer range and is suitable for further study on biosensor technology or drug delivery system application.
机译：结晶碳酸钙（CaCO3）是一种易于获得的无机物质，可以人工生产。在工业上的广泛应用，特别是作为填充剂，已经增加了对其特性和性能进行进一步研究的需要。 CaCO3晶体在生物医学应用中也可能为羟基磷灰石提供一条途径。碳酸钙的理化性质可以通过不同的制备方法来控制。这项研究集中于沉淀法合成CaCO3。氯化钙（CaCl2）和碳酸铵（NH4CO3）用于合成，浓度范围为0.05 M至1.0M。进行元素和颗粒分析，以描述所得产物的结构和相鉴定。元素分析通过X射线衍射（XRD），傅立叶变换红外光谱（FT-IR），拉曼光谱和能量色散X射线分析（ED-X）进行。通过元素分析，证实了所得产物为方解石微粒。通过纳米粒子粒度仪，XRD和FE-SEM显微照片对颗粒和微晶尺寸进行了进一步分析。由上述分析推导，通过Scherrer方程测得的最小晶粒尺寸为通过沉淀0.5M浓度的CaCO 3获得的85.71nm。用FESEM显微照片测得的最小粒度也相符，显示出783nm尺寸的颗粒的最小裕度。 CaCO 3的光学特性通过紫外光谱法（UV-vis）描述，显示UV在UV-C范围内被吸收。通过提出计算的吸收系数0.1154 M-1 cm（-1），该研究也可提供很多信息。关于CaCO3沉淀法的最新研究很少报道其吸收系数：因此，该信息是有用的。结论是，CaCO3沉淀的最佳浓度在0.1 M-0.5 M的范围内。合成的CaCO3晶体均<= 1000 nm。这项研究表明，沉淀法能够产生微米范围内的方解石，适合进一步研究生物传感器技术或药物输送系统的应用。

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  • 来源
    《Materials Science and Engineering》 |2019年第4期|78-85|共8页
  • 作者

    Sulimai N. H.; Rani Rozina Abdul; Khusaimi Z.; Abdullah S.; Salifairus M. J.; Alrokayan Salman; Khan Haseeb; Sermon P. A.; Rusop Mohamad;

  • 作者单位

    Univ Teknol MARA UiTM, Inst Sci, NANO SciTech Ctr, Shah Alam 40450, Selangor, Malaysia|Univ Teknol MARA UiTM, Fac Sci Appl, Shah Alam 40450, Selangor, Malaysia;

    Univ Teknol MARA UiTM, Inst Sci, NANO SciTech Ctr, Shah Alam 40450, Selangor, Malaysia|Univ Teknol MARA UiTM, Fac Mech Engn, Shah Alam 40450, Selangor, Malaysia;

    Univ Teknol MARA UiTM, Inst Sci, NANO SciTech Ctr, Shah Alam 40450, Selangor, Malaysia|Univ Teknol MARA UiTM, Fac Sci Appl, Shah Alam 40450, Selangor, Malaysia;

    Univ Teknol MARA UiTM, Inst Sci, NANO SciTech Ctr, Shah Alam 40450, Selangor, Malaysia|Univ Teknol MARA UiTM, Fac Sci Appl, Shah Alam 40450, Selangor, Malaysia;

    Univ Teknol MARA UiTM, Inst Sci, NANO SciTech Ctr, Shah Alam 40450, Selangor, Malaysia|Univ Teknol MARA UiTM, Fac Sci Appl, Shah Alam 40450, Selangor, Malaysia;

    King Saud Univ, Coll Sci, Dept Biochem, Res Chair Biomed Applicat Nanomat, Riyadh 11451, Saudi Arabia;

    King Saud Univ, Coll Sci, Dept Biochem, Res Chair Biomed Applicat Nanomat, Riyadh 11451, Saudi Arabia;

    Brunel Univ, Nano & Biomimet Mat Lab, Uxbridge UB8 3PH, Middx, England;

    Univ Teknol MARA UiTM, Inst Sci, NANO SciTech Ctr, Shah Alam 40450, Selangor, Malaysia|Univ Teknol MARA UiTM, Fac Elect Engn, NANO ElecTron Ctr, Shah Alam 40450, Selangor, Malaysia;

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  • 正文语种 eng
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  • 关键词

    Calcite; Well disperse; Precipitation; Calcium chloride precursor; Ammonium carbonate precursor; Phase stability;

    机译：方解石;分散良好;沉淀;氯化钙前体;碳酸铵前体;相稳定性;

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