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首页> 外文期刊>ACS Sustainable Chemistry & Engineering >CO2-Responsive Switchable Solvents to Induce Self-Assembled Crystallization and Phase Control of CaCO3
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CO2-Responsive Switchable Solvents to Induce Self-Assembled Crystallization and Phase Control of CaCO3

机译:CO2响应可切换溶剂诱导自组装结晶和CaCO3的相对照

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摘要

We propose a novel and cyclic synthetic approach for controlling crystal polymorphs of CaCO3 by using green CO2-responsive switchable solvents which acted as both the CO2 capturer for the carbonate source and the polymorphisms director. Five solvents were employed, and various reaction conditions such as calcium resources, calcium concentration, reaction temperature, and reaction time were investigated. Results show that this developed framework permits producing any crystalline CaCO3 phases including metastable vaterite and aragonite in pure phases by selecting a suitable solvent and adjustment of the reaction conditions. Furtherly, the mechanism study demonstrates that the solvents attach on the surface of the primary nanoparticles to selectively control and direct the growth of any specific polymorph phases. Eventually, the nuclei are self-assembled into an oriented geometry, allowing the growth and stability of specific crystals; as such, spherical vaterite, rods, and shuttle-like aragonite crystals can be obtained. This new configuration would be an appropriate and an efficient method to apply to large-scale production, therefore, a promising process attributed to complete solvent recovery and regeneration of the initial reactants, thus being an environmentally risk-free route.
机译:我们提出了一种通过使用绿色二氧化碳响应可切换溶剂来控制CaCO3晶体多晶型的新颖和环状合成方法,其作为碳酸盐源和多态性导向器的CO2捕获剂。研究了五种溶剂,研究了各种反应条件,例如钙资源,钙浓度,反应温度和反应时间。结果表明,该开发框架允许通过选择合适的溶剂和调节反应条件,在纯相中产生任何结晶Caco3阶段,包括纯相中的稳定相。此外,机制研究表明,溶剂附着在初级纳米颗粒的表面上以选择性地控制和引导任何特异性多晶型相的生长。最终,核自组装成定向几何形状,允许特定晶体的生长和稳定性;因此,可以获得球形Vaterite,棒和梭式的横梁晶体。这种新配置将是适用于大规模生产的有效和有效的方法,因此是归因于初始反应物的完全溶剂回收和再生的有希望的过程,因此是无害无地的无风险路线。

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  • 作者单位

    Xiamen Univ Natl Engn Lab Green Chem Prod Alcohols Ethers &

    E Coll Chem &

    Chem Engn Dept Chem &

    Biochem Engn Dept Chem 422 South Siming Rd Xiamen 361005 Fujian Peoples R China;

    Xiamen Univ Natl Engn Lab Green Chem Prod Alcohols Ethers &

    E Coll Chem &

    Chem Engn Dept Chem &

    Biochem Engn Dept Chem 422 South Siming Rd Xiamen 361005 Fujian Peoples R China;

    Xiamen Univ Natl Engn Lab Green Chem Prod Alcohols Ethers &

    E Coll Chem &

    Chem Engn Dept Chem &

    Biochem Engn Dept Chem 422 South Siming Rd Xiamen 361005 Fujian Peoples R China;

    Xiamen Univ Natl Engn Lab Green Chem Prod Alcohols Ethers &

    E Coll Chem &

    Chem Engn Dept Chem &

    Biochem Engn Dept Chem 422 South Siming Rd Xiamen 361005 Fujian Peoples R China;

    Xiamen Univ Natl Engn Lab Green Chem Prod Alcohols Ethers &

    E Coll Chem &

    Chem Engn Dept Chem &

    Biochem Engn Dept Chem 422 South Siming Rd Xiamen 361005 Fujian Peoples R China;

    Xiamen Univ Natl Engn Lab Green Chem Prod Alcohols Ethers &

    E Coll Chem &

    Chem Engn Dept Chem &

    Biochem Engn Dept Chem 422 South Siming Rd Xiamen 361005 Fujian Peoples R China;

    Xiamen Univ Natl Engn Lab Green Chem Prod Alcohols Ethers &

    E Coll Chem &

    Chem Engn Dept Chem &

    Biochem Engn Dept Chem 422 South Siming Rd Xiamen 361005 Fujian Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学工业;
  • 关键词

    Switchable solvent; CO2 capturer; Polymorph director; Vaterite; Aragonite;

    机译:可切换溶剂;CO2捕获器;多晶型指示;Vaterite;金色的;

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