Fabrication and morphology tuning of graphene oxide nanoscrolls

被引:68
作者
Amadei, Carlo A. [1 ]
Stein, Itai Y. [2 ]
Silverberg, Gregory J. [1 ]
Wardle, Brian L. [3 ]
Vecitis, Chad D. [1 ]
机构
[1] Harvard Univ, John A Paulson Sch Engn & Appl Sci, Cambridge, MA 02138 USA
[2] MIT, Dept Mech Engn, 77 Massachusetts Ave, Cambridge, MA 02139 USA
[3] MIT, Dept Aeronaut & Astronaut, 77 Massachusetts Ave, Cambridge, MA 02139 USA
基金
美国国家科学基金会;
关键词
QUALITY CARBON NANOSCROLLS; FACILE PREPARATION; ELASTIC PROPERTIES; CRYSTALLITE SIZE; EXFOLIATION; SHEETS; NANOTUBES; ASSEMBLIES; CAVITATION; REDUCTION;
D O I
10.1039/c5nr07983g
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Here we report the synthesis of graphene oxide nanoscrolls (GONS) with tunable dimensions via low and high frequency ultrasound solution processing techniques. GONS can be visualized as a graphene oxide (GO) sheet rolled into a spiral-wound structure and represent an alternative to traditional carbon nanomorphologies. The scrolling process is initiated by the ultrasound treatment which provides the scrolling activation energy for the formation of GONS. The GO and GONS dimensions are observed to be a function of ultrasound frequency, power density, and irradiation time. Ultrasonication increases GO and GONS C-C bonding likely due to in situ thermal reduction at the cavitating bubble-water interface. The GO area and GONS length are governed by two mechanisms; rapid oxygen defect site cleavage and slow cavitation mediated scission. Structural characterization indicates that GONS with tube and cone geometries can be formed with both narrow and wide dimensions in an industrial-scale time window. This work paves the way for GONS implementation for a variety of applications such as adsorptive and capacitive processes.
引用
收藏
页码:6783 / 6791
页数:9
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