在石墨烯原始和空缺类型缺陷中定水的初步研究
Mariana Zancan Tonel1, João Pedro Kleinubing Abal2, Solange Binotto Fagan3
1Universidade Franciscana-UFN, PPGNANO - Postgraduate Program in Nanoscience, Rua dos Andradas, 1614, ZIP, Santa Maria, RS, 97010-032, Brazil. marianaztonel@gmail.com.
Journal of molecular modeling
|June 2, 2023
概括
这项研究使用密度功能理论 (DFT) 来研究水与原始和缺陷石墨烯的相互作用. 纯粹的石墨烯倾向于下方配置,而空缺则会对水的相互作用产生不同的影响,影响纳米膜技术和石墨烯的湿透性.
科学领域:
- 材料科学 材料科学 材料科学
- 计算化学计算化学
- 表面科学是一门学科.
背景情况:
- 研究水与原始和有缺陷的石墨烯板的相互作用.
- 使用基于密度函数理论 (DFT) 的第一原则计算.
研究的目的:
- 了解水与原始和空白石墨烯的相互作用机制.
- 探索碳空缺对石墨烯表面特性和水浸透性的影响.
主要方法:
- 通过SIESTA程序使用密度函数理论 (DFT) 计算.
- 通过Kohn-Sham方程分析电子,能量和结构性质.
- 使用双 ζ 加极化函数 (DZP) 基础集和局部密度近似 (LDA) 与 BSSE 校正.
主要成果:
- 纯石墨烯在下方配置中显示稳定的水相互作用 (在2.375 Å时13.62 kJ/mol).
- 瓦克-1C石墨烯倾向于 DOWN 配置,其结合能从 -20.60 到 -18.41 kJ/mol.
- 瓦克-4C石墨烯通过空缺中心 (-13.28 到 -20.49 kJ/mol) 显示出有利的相互作用.
结论:
- 结果为纳米膜技术发展提供了洞察力.
- 提高对原始和有缺陷的石墨烯板的湿度影响的理解.
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