The characterization of gamma-irradiated carbon-nanostructured materials carried out using a multi-analytical approach including Raman spectroscopy
The characterization of gamma-irradiated carbon-nanostructured materials carried out using a multi-analytical approach including Raman spectroscopy
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DOI：
10.1016/j.apsusc.2019.05.294
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发表时间：
2019-09-15
影响因子：
6.7
通讯作者：
Malekie, Shahryar
中科院分区：
文献类型：
--
作者：
Vatankhah, Ahmad Reza;Hosseini, Mohammad Amin;Malekie, Shahryar
在本实验工作中，使用拉曼光谱对伽马辐照碳纳米结构材料（CNM）中的结构缺陷进行了比较研究，包括石墨烯纳米板（GNP）、氧化石墨烯（GO）、单壁碳纳米管（SWCNT）、多壁碳纳米管（MWCNT）、SWCNT-OH和MWCNT-OH，以获得I-D/I-G参数。所有样品均在环境条件下在空气中以 0-100 kGy 的不同吸收剂量接受 Co-60 辐照。此外，还使用 XRD、FTIR、FESEM 和 HRTEM 分析来表征 CNM 中的缺陷。 GO 的 FTIR 分析证实了 C-O、C=O 和 OH 官能团的存在。 GO 在 30 和 50 kGy 下的 HRTEM 分析结果表明 GO 边缘发生弯曲和收缩，并产生碳洋葱。所有样品的拉曼光谱表明，根据吸收剂量和 CNM 的种类，CNM 中的缺陷产生和石墨化之间同时存在竞争；其中到10 kGy时，由于碳原子对称顺序的破坏，I-D/I-G值增加，而100 kGy时碳原子的石墨化是主要影响，除了SWCNT之外。 GO和MWCNT的I-D/I-G参数最小值分别为3.9%和4%。
In this experimental work, the comparative study of structural defects in gamma-irradiated carbon nanostructured materials (CNMs) including Graphene Nanoplate (GNP), Graphene Oxide (GO), Single-Walled Carbon Nanotube (SWCNT), Multi-Walled Carbon Nanotube (MWCNT), SWCNT-OH, and MWCNT-OH was investigated using Raman spectroscopy to obtain I-D/I-G parameter. All the samples were irradiated by Co-60 in different absorbed doses of 0-100 kGy in air at ambient conditions. Also, XRD, FTIR, FESEM, and HRTEM analyses were used to characterize defects in the CNMs. FTIR analysis of GO confirmed the presence of C-O, C=O, and OH functional groups. Results of HRTEM analysis for GO at 30 and 50 kGy indicated bending and shrinkage of GO edges and creation of carbon onions. Raman spectroscopy of the all samples showed that there was a simultaneous competition between defect creation and graphitization in the CNMs depending on the absorbed dose and the kind of CNM; In which up to 10 kGy, due to breakage of symmetric order of the carbon atoms, the value of I-D/I-G was increased, while graphitization of the carbon atoms at 100 kGy was the predominant effect, except for SWCNT. The minimum values of I-D/I-G parameter belonged to GO and MWCNT equaled 3.9% and 4% respectively.