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缺陷和电荷对水中的石墨烯的体稳定性的影响

João Paulo Vita Damasceno^1,2,3, Emmanuel Picheau^2,3, Ferdinand Hof^2,3

¹Department of Chemistry, Federal University of Paraná (UFPR), CP 19032, CEP 81531-980, Curitiba, PR, Brazil.

Chemistry (Weinheim an der Bergstrasse, Germany)

|February 18, 2024

概括

稳定的水性石墨烯分散物是使用石墨间化合物 (GIC) 生产的. 这种方法最大限度地减少了缺陷,并通过静电力增强了石墨烯在水中的稳定性,从而实现了实际应用.

科学领域:

材料科学材料科学材料科学
纳米技术纳米技术
化学化学化学

背景情况:

大规模的石墨烯生产需要克服石墨中的强范德瓦尔斯力,这往往会导致缺陷和高能源成本.
石墨间化合物 (GICs) 提供了一个有前途的替代品,通过提供预先分离的层来进行更温和的脱皮.
稳定的水性石墨烯分散对于将石墨烯整合到各种应用中至关重要.

研究的目的:

研究一种方法,从GIC中产生稳定的水性石墨烯分散物 (EdG).
阐明静电力的作用在水中的脱皮石墨烯的稳定性.
优化氧化和溶剂交换程序,以获得高质量的EDG.

主要方法:

使用石墨间化合物 (GIC) 作为石墨烯剥落的起始材料.
使用溶剂交换策略与石墨烯酸氧化相结合,产生石墨烯片.
研究了氧化时间和脱水技术对石墨烯质量和分散稳定性的影响.

主要成果:

证明静电力是稳定在水性介质中的脱皮石墨烯的主要机制.
表明氧化石墨烯在暴露在水中之前限制了缺陷的引入.
证实,在加入预氧化石墨烯之前去除水气增强了长期的EdG稳定性.

结论:

使用GICs建立了一个更温和,缺陷最小化的途径,以稳定水性石墨烯分散 (EdG).
氧化和溶剂交换的优化程序对于生产高质量,稳定的石墨烯至关重要.
这些发现有助于将石墨烯通过稳定,以水为基础的配方纳入实际应用.

关键词:

石墨烯的分散稳定性石墨烯的分散稳定性石墨烯是一种石墨烯.石墨烯拉曼光谱法拉曼光谱法基于石墨烯的分散剂.石墨间化合物石墨间化合物

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