滚动减少的石墨烯氧化物诱导室温磁力通过缺陷的空间合
Ting Shi1, Yuan Yao1, Yang Hong1
1MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, People's Republic of China. yyuan@hit.edu.cn.
Materials horizons
|July 13, 2023
概括
研究人员使用缺陷丰富的减少氧化石墨烯 (DR-rGO) 纳米卷创建了室温磁性碳材料. 这一突破使磁力和电磁波吸收的先进应用成为可能.
科学领域:
- 材料科学 材料科学 材料科学
- 凝聚物质物理学 凝聚物质物理学
- 纳米技术 纳米技术
背景情况:
- 石墨烯因其独特的特性和应用而备受追捧.
- 纯石墨烯具有二磁性,使得没有过渡金属或稀土元素的室温磁铁具有挑战性.
- 开发磁性碳材料对于各种技术进步至关重要.
研究的目的:
- 在不依赖过渡金属或稀土元素的情况下,在石墨烯基材料中实现室温铁磁性.
- 研究在缺陷工程石墨烯纳米卷轴中诱导磁性的背后机制.
- 探索这些磁性材料在吸收电磁波方面的潜力.
主要方法:
- 制造缺陷丰富的减少氧化石墨烯 (DR-rGO) 纳米卷.
- 在室温下对磁性特性进行实验性表征.
- 密度函数理论 (DFT) 的计算,以了解磁力诱导.
主要成果:
- 在DR-rGO纳米卷中实现了室温铁磁性,其和磁化值为0.93emu g-1在300K.
- 证明缺陷的空间合增强了鲁德曼-基特尔-卡苏亚-约西达相互作用,诱导了磁性.
- 观察到高效率的电磁波吸收,反射损失最小 (-62.1dB) 和广泛的有效吸收带宽 (7.8GHz在3.0mm).
结论:
- 在DR-rGO纳米卷中的空间缺陷合是一种有效的策略,可以在碳材料中诱导室温铁磁.
- 开发的磁石墨烯纳米卷显示了先进的电磁波吸收应用的前景.
- 这项工作为创建各种技术领域的新型磁性碳材料提供了基础.
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