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通过玛辐射对氧化石烯气凝单体的修改

Y M Shulga¹, S A Baskakov¹, E N Kabachkov¹

¹Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry of RAS, Acad. Semenov ave. 1, Chernogolovka, 142432, Russian Federation.

Chemphyschem : a European journal of chemical physics and physical chemistry

|March 12, 2025

概括

石墨烯氧化物气凝 (GOA) 的马辐射改变了它们的结构,降低了氧/碳比,增加了sp3键. 在40kGy的表面层脱落改善了n-hexane吸附特性.

科学领域:

材料科学材料科学材料科学
纳米技术纳米技术
辐射化学辐射化学

背景情况:

氧化石墨烯气凝 (GOA) 是具有可调节性质的先进多孔材料.
了解像玛辐射这样的外部刺激的影响对于材料修饰至关重要.

研究的目的:

研究60Co玛辐射对单体石墨烯氧化物气凝结构和化学性质的影响.
探索辐射剂量与GOA形态和表面化学变化之间的关系.
为了评估辐射诱导的表面修饰对吸附能力的影响.

主要方法:

合成单质石墨烯氧化物气凝 (GOA),体积大约为4厘米3.
使用60Co玛射线对GOA样品进行辐射,其剂量范围为10220 kGy.
使用X射线光电谱 (XPS) 进行表征,以确定元素组成 (O/C比).
使用拉曼光谱法进行分析,以评估结合的变化 (sp2与sp3).
显微镜检查,观察表面形态和毛孔结构.
使用n-hexane进行吸附试验,以评估材料性能.

主要成果:

XPS分析显示,随着马辐射剂量的增加,氧/碳比下降.
拉曼光谱显示G峰值的蓝色转移,表明sp3债券的比例增加.
观察到,在40kGy的剂量下,表面层脱离亚洲政府的单体石开始脱离.
与内部层相比,脱皮的表面层呈现出较小的孔径.
在移除表面层后,获得了GOA对n-hexane的改善吸附特性.

结论:

玛辐射有效地改变了石墨烯氧化物气凝的化学结构和表面特性.
辐射诱导的表面脱皮是影响GOA形态的一个关键现象.
观察到的变化,特别是表面层的去除,增强了GOA对n-hexane等特定化合物的吸附能力.

关键词:

氧化石墨烯气凝是氧化石墨烯气凝.马辐射辐射的马辐射辐射.扫描电子显微镜扫描电子显微镜这是光谱学.空气凝单体的表面.

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