Effects of hybrid surfactants on the quality and yield of graphene using a novel electrochemical-mechanical exfoliation process

Zi Ying Chen, Chun Kai Huang, Chii Rong Yang*, Shih Feng Tseng

*此作品的通信作者

研究成果: 雜誌貢獻期刊論文同行評審

摘要

In this study, a novel electrochemical–mechanical exfoliation (EME) process combined with hybrid surfactants was used to prepare graphene nanosheets (GNSs). The effects of hybrid surfactants and post-treatments on the yield and quality of the prepared GNSs were investigated. Before and after the EME process, X-ray powder diffraction, Raman spectroscopy, X-ray photoelectron spectroscopy, field emission scanning electron microscopy (FE-SEM), transmission electron microscopy, and atomic force microscopy were conducted to evaluate the crystallinity, degree of defects, oxygen-to-carbon (O/C) ratio, surface morphology, size, and thickness of graphite powder and the prepared GNSs, respectively. The experimental results revealed that the maximum yield of the GNSs was 19.68% when 1 wt.% polydimethyldiallylammonium chloride (PDDA) and 0.005 wt.% sodium dihexyl sulfosuccinate (SDSS) were mixed in deionized water for graphite pretreatment and high-speed shear exfoliation and when 1 wt.% PDDA and 0.01 wt.% SDSS were mixed in H2SO4 solution for electrochemical intercalation. The lowest O/C ratio, highest I2D/IG ratio, and lowest ID/IG ratio of the supernatant centrifuged at 3000 rpm were 1.12, 1.085, and 0.274, respectively. The FE-SEM images of the GNSs clearly indicated the effectiveness of exfoliation. Moreover, the average diameter and thickness of the prepared GNSs were approximately 5.2 µm and 2.4 nm, respectively.

原文英語
頁(從 - 到)6809-6817
頁數9
期刊International Journal of Advanced Manufacturing Technology
119
發行號9-10
DOIs
出版狀態已發佈 - 2022 4月

ASJC Scopus subject areas

  • 控制與系統工程
  • 軟體
  • 機械工業
  • 電腦科學應用
  • 工業與製造工程

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