Abstract
| Original language | English |
|---|---|
| Pages (from-to) | 3552 - 3559 |
| Number of pages | 8 |
| Journal | Langmuir: the ACS journal of surfaces and colloids |
| Volume | 32 |
| Issue number | 14 |
| DOIs | |
| Publication status | Published - 26 Apr 2016 |
Cite this
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Shear assisted electrochemical exfoliation of graphite to graphene. / Shinde, Dhanraj B.; Brenker, Jason ; Easton, Christopher D.; Tabor, Rico F.; Neild, Adrian; Majumder, Mainak.
In: Langmuir: the ACS journal of surfaces and colloids, Vol. 32, No. 14, 26.04.2016, p. 3552 - 3559.Research output: Contribution to journal › Article › Research › peer-review
TY - JOUR
T1 - Shear assisted electrochemical exfoliation of graphite to graphene
AU - Shinde, Dhanraj B.
AU - Brenker, Jason
AU - Easton, Christopher D.
AU - Tabor, Rico F.
AU - Neild, Adrian
AU - Majumder, Mainak
PY - 2016/4/26
Y1 - 2016/4/26
N2 - The exfoliation characteristics of graphite as a function of applied anodic potential (1-10V) in combination with shear field (400- 74 400 s-1) have been studied in a custom-designed microfluidic reactor. Systematic investigation by atomic force microscopy (AFM) indicates that at higher potentials thicker and more fragmented graphene sheets are obtained, while at potentials as low as 1 V, pronounced exfoliation is triggered by the influence of shear. The shear-assisted electrochemical exfoliation process yields large (∼10 μm) graphene flakes with a high proportion of single, bilayer, and trilayer graphene and small ID/IG ratio (0.21-0.32) with only a small contribution from carbonoxygen species as demonstrated by Xray photoelectron spectroscopy measurements. This method comprises intercalation of sulfate ions followed by exfoliation using shear induced by a flowing electrolyte. Our findings on the crucial role of hydrodynamics in accentuating the exfoliation efficiency suggest a safer, greener, and more automated method for production of high quality graphene from graphite.
AB - The exfoliation characteristics of graphite as a function of applied anodic potential (1-10V) in combination with shear field (400- 74 400 s-1) have been studied in a custom-designed microfluidic reactor. Systematic investigation by atomic force microscopy (AFM) indicates that at higher potentials thicker and more fragmented graphene sheets are obtained, while at potentials as low as 1 V, pronounced exfoliation is triggered by the influence of shear. The shear-assisted electrochemical exfoliation process yields large (∼10 μm) graphene flakes with a high proportion of single, bilayer, and trilayer graphene and small ID/IG ratio (0.21-0.32) with only a small contribution from carbonoxygen species as demonstrated by Xray photoelectron spectroscopy measurements. This method comprises intercalation of sulfate ions followed by exfoliation using shear induced by a flowing electrolyte. Our findings on the crucial role of hydrodynamics in accentuating the exfoliation efficiency suggest a safer, greener, and more automated method for production of high quality graphene from graphite.
U2 - 10.1021/acs.langmuir.5b04209
DO - 10.1021/acs.langmuir.5b04209
M3 - Article
VL - 32
SP - 3552
EP - 3559
JO - Langmuir: the ACS journal of surfaces and colloids
JF - Langmuir: the ACS journal of surfaces and colloids
SN - 0743-7463
IS - 14
ER -