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Brunauer–Emmett–Teller (BET) Specific Surface Area Analysis of Different Graphene Materials: A Comparison to their Structural Regularity and Electrical Properties
Solid State Communications ( IF 2.1 ) Pub Date : 2020-10-01 , DOI: 10.1016/j.ssc.2020.114004
Velram Balaji Mohan , Krishnan Jayaraman , Debes Bhattacharyya

Abstract Graphene has obtained a great interest both in research and industries due to its potential and promising physical, electrical and mechanical properties. While it has been widely researched for advanced applications, its fundamental properties are still being explored and have to be well understood. The physical properties such as specific surface area (SSA), inter-sheet distance (d-spacing) and Raman spectroscopy data for graphene derivatives are closely related to each other, and this work focused on establishing the correlation between these critical factors with respect to their electrical conductivities. Different graphitic materials f(graphene oxide (GO), reduced graphene oxides (rGO), functionalised graphene oxide (frGO) and graphene nanoplatelets (GNP)) were taken in to account to elaborate the underlying mechanisms between extrinsic SSA and other physical parameters, such as intrinsic electrical conductivity. It has been analytically observed that SSA has a direct relationship with d-spacing and defect density of the graphene materials and thus their electrical conductivity highly depends on how large their SSA is the largest the SSA, the highest the electrical conductivity. Materials that poorly reduced were identified to be having low SSA and a higher level of discrepancies. Among different reducing agents used, hydroiodic reduced graphene oxide found to be having larger SSA as 670.98 m2 g−1 and higher electrical conductivity up to 103.3 S cm−1.

中文翻译:

Brunauer-Emmett-Teller (BET) 不同石墨烯材料的比表面积分析:比较它们的结构规律和电性能

摘要 石墨烯因其潜在的物理、电学和机械性能而在研究和工业领域引起了极大的兴趣。虽然它已被广泛研究用于高级应用,但其基本特性仍在探索中,必须很好地理解。石墨烯衍生物的比表面积 (SSA)、层间距离 (d-spacing) 和拉曼光谱数据等物理性质彼此密切相关,这项工作的重点是建立这些关键因素之间的相关性。它们的导电性。不同的石墨材料 f(氧化石墨烯 (GO)、还原氧化石墨烯 (rGO)、功能化氧化石墨烯(frGO)和石墨烯纳米片(GNP))被考虑在内,以阐述外在 SSA 与其他物理参数(如内在电导率)之间的潜在机制。已经分析观察到 SSA 与石墨烯材料的 d 间距和缺陷密度有直接关系,因此它们的导电性高度取决于它们的 SSA 有多大,SSA 最大,电导率最高。还原不良的材料被确定为具有低 SSA 和更高水平的差异。在使用的不同还原剂中,氢碘还原氧化石墨烯的 SSA 更大,为 670.98 m2 g-1,电导率高达 103.3 S cm-1。已经分析观察到 SSA 与石墨烯材料的 d 间距和缺陷密度有直接关系,因此它们的导电性高度取决于它们的 SSA 有多大,SSA 最大,电导率最高。还原不良的材料被确定为具有低 SSA 和更高水平的差异。在使用的不同还原剂中,氢碘还原氧化石墨烯的 SSA 更大,为 670.98 m2 g-1,电导率高达 103.3 S cm-1。已经分析观察到 SSA 与石墨烯材料的 d 间距和缺陷密度有直接关系,因此它们的导电性高度取决于它们的 SSA 有多大,SSA 最大,电导率最高。还原不良的材料被确定为具有低 SSA 和更高水平的差异。在使用的不同还原剂中,氢碘还原氧化石墨烯的 SSA 更大,为 670.98 m2 g-1,电导率高达 103.3 S cm-1。还原不良的材料被确定为具有低 SSA 和更高水平的差异。在使用的不同还原剂中,氢碘还原氧化石墨烯的 SSA 更大,为 670.98 m2 g-1,电导率高达 103.3 S cm-1。还原不良的材料被确定为具有低 SSA 和更高水平的差异。在使用的不同还原剂中,氢碘还原氧化石墨烯的 SSA 更大,为 670.98 m2 g-1,电导率高达 103.3 S cm-1。
更新日期:2020-10-01
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