A Sweet Synthesis of MXenes

IF 9.1 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nano Letters Pub Date : 2024-08-14 DOI:10.1021/acs.nanolett.4c0258410.1021/acs.nanolett.4c02584

Wenkang Xu, Zenan Shi, Zhiyang Yu, Chao Peng, Guangxing Yang, Hao-Fan Wang, Jiangnan Huang, Yonghai Cao, Hongjuan Wang, Libo Li* and Hao Yu*,

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Abstract

Two-dimensional transition metal carbides/nitrides (MXenes) have shown great promise in various applications. However, mass production of MXenes suffers from the excessive use of toxic fluorine-containing reagents. Herein, a new method was validated for synthesizing MXenes from five MAX ceramics. The method features a minimized (stoichiometric) dosage of F-containing reagent (NaBF₄) and polyols (glycerol, erythritol, and xylitol) as the reaction solvent. Due to the sweetness of polyols and the low environmental impact, we refer to this method as a “sweet” synthesis of MXenes. An in-depth molecular dynamics simulation study, combined with experimental kinetic parameters, further revealed that the diffusion of F^– in the confined interplanar space is rate-determining for the etching reaction. The expansion of interlayer spacing by polyols effectively reduces the diffusion activation energy of F^– and accelerates the etching reaction.

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MXenes 的甜蜜合成

二维过渡金属碳化物/氮化物（MXenes）在各种应用中显示出巨大的前景。然而，MXenes 的大规模生产受到过量使用有毒含氟试剂的影响。本文验证了一种从五种 MAX 陶瓷合成 MXenes 的新方法。该方法的特点是将含氟试剂（NaBF4）的用量降至最低（化学计量），并使用多元醇（甘油、赤藓糖醇和木糖醇）作为反应溶剂。由于多元醇的甜味和对环境的低影响，我们将这种方法称为 MXenes 的 "甜味 "合成。深入的分子动力学模拟研究与实验动力学参数相结合，进一步揭示了 F- 在封闭的平面间隙中的扩散是蚀刻反应的速率决定因素。多元醇扩大了层间距，有效降低了 F- 的扩散活化能，加速了蚀刻反应。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Nano Letters 工程技术-材料科学：综合

CiteScore

16.80

自引率

2.80%

发文量

1182

审稿时长

1.4 months

期刊介绍： Nano Letters serves as a dynamic platform for promptly disseminating original results in fundamental, applied, and emerging research across all facets of nanoscience and nanotechnology. A pivotal criterion for inclusion within Nano Letters is the convergence of at least two different areas or disciplines, ensuring a rich interdisciplinary scope. The journal is dedicated to fostering exploration in diverse areas, including: - Experimental and theoretical findings on physical, chemical, and biological phenomena at the nanoscale - Synthesis, characterization, and processing of organic, inorganic, polymer, and hybrid nanomaterials through physical, chemical, and biological methodologies - Modeling and simulation of synthetic, assembly, and interaction processes - Realization of integrated nanostructures and nano-engineered devices exhibiting advanced performance - Applications of nanoscale materials in living and environmental systems Nano Letters is committed to advancing and showcasing groundbreaking research that intersects various domains, fostering innovation and collaboration in the ever-evolving field of nanoscience and nanotechnology.