Green Full Conversion of ZnO Nanopowders to Well-Dispersed Zeolitic Imidazolate Framework-8 (ZIF-8) Nanopowders via a Stoichiometric Mechanochemical Reaction for Fast Dye Adsorption,Crystal Growth & Design

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Green Full Conversion of ZnO Nanopowders to Well-Dispersed Zeolitic Imidazolate Framework-8 (ZIF-8) Nanopowders via a Stoichiometric Mechanochemical Reaction for Fast Dye Adsorption
Crystal Growth & Design ( IF 3.2 ) Pub Date : 2020-03-06 , DOI: 10.1021/acs.cgd.0c00129
Mahdiar Taheri ₁ , Iolanda Di Bernardo ₂ , Adrian Lowe ₃ , David R. Nisbet ₄ , Takuya Tsuzuki ₁

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In recent years, many nanofabrication methodologies to engineer metal organic frameworks (MOFs) have been investigated. However, there is only a small number of studies that explores scalable and environmentally friendly synthesis routes. This study reports the production of well-dispersed MOF nanopowders from an inexpensive precursor, in a green and scalable manner, with a high yield and minimal waste, for water remediation applications. One-step mechanochemical processing of a stoichiometric ratio of ZnO nanoparticles and 2-methylimidazole resulted in the full conversion of ZnO nanopowders into zeolitic imidazolate framework-8 (ZIF-8) of ca. 80 nm in diameter with little agglomeration. The particles had a surface area of 1885 m²/g, among the highest reported for ZIF-8 and close to the theoretical maximum of 1947 m²/g. For the first time, we studied the enhanced ability of our converted nanopowders to adsorb more model organic pollutants than ZIF-8 nanopowders synthesized via the most commonly used solution-based method. Details of the processing conditions, including milling-ball size, milling time, and postmilling treatment that influence the conversion yield, were systematically investigated using dry reactive grinding and liquid-assisted grinding. This work provides a new strategy for the commercial production of wide-ranging MOFs for environmental applications.

中文翻译：

ZnO纳米粉通过化学计量机械化学反应快速分散为良好分散的沸石咪唑盐骨架8（ZIF-8）纳米粉的绿色完全转化。

近年来，已经研究了许多用于制造金属有机框架（MOF）的纳米制造方法。但是，只有少数研究探索了可扩展且环保的合成路线。这项研究报告了一种廉价的前体以绿色，可扩展的方式生产出分散良好的MOF纳米粉，具有高收率和极少的浪费，可用于水修复应用。ZnO纳米粒子和2-甲基咪唑的化学计量比的一步机械化学处理导致ZnO纳米粉完全转化为约2.7的沸石咪唑酸酯骨架8（ZIF-8）。直径80 nm，几乎没有团聚。颗粒的表面积为1885m ^2。/ g，是ZIF-8报告的最高值，接近理论最高值1947 m ² / g。与通过最常用的基于溶液的方法合成的ZIF-8纳米粉相比，我们首次研究了转化后的纳米粉吸附更多模型有机污染物的能力。使用干式反应研磨和液体辅助研磨系统地研究了加工条件的细节，包括磨球尺寸，磨时间和影响转化率的后磨处理。这项工作为用于环境应用的各种MOF的商业生产提供了新的策略。

更新日期：2020-04-23

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