TY - JOUR
T1 - Geometry-Dependent Thermal Reduction of Graphene Oxide Solid
AU - Klemeyer, Lars
AU - Park, Hun
AU - Huang, Jiaxing
N1 - Funding Information:
This work is supported by the Office of Naval Research (ONR N000142012190).
Funding Information:
The work made use of materials characterization capabilities in the REACT Core facility, which has received funding from the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Catalysis Science program (DE-FG02-03ER15457) used for the purchase of the Altamira AMI-200, and the NUANCE core facility, which has received support from the SHyNE resource (NSF ECCS-1542205) and NU-MRSEC (NSF DMR-1121262). L.K. acknowledges the University of Hamburg for a scholarship (Hamburglobal) and Prof. Dorota Koziej for supporting his visit to Northwestern University. J.H. is thankful for an earlier Humboldt Research Award, which was used to provide supplementary support to L.K.’s visit. The authors thank Haiyue Huang for her extended help and support in the sample preparation and for helpful discussions about the interpretation of the data, Luke Prestowitz for initial help in collecting the XPS data, and Dr. Zhilong Yu for technical discussions, and assistance in graphic design.
Publisher Copyright:
©
PY - 2021/5/3
Y1 - 2021/5/3
N2 - Graphene oxide (GO) sheets have been used as a building block to construct various bulk forms of graphene structures such as films, fibers, foams, and dense solids. Thermal reduction of GO, where GO actually undergoes a disproportionation reaction to yield reduced GO (r-GO), accompanied by evolution of carbonaceous gases, has critical influence over the mechanical, thermal, and electrical properties and chemical stability of the resulting bulk graphene solids. Here, we report that this thermal reduction process is geometry-dependent for bulk GO solids, including the peak temperature of reaction, reaction rate, the chemical composition of released gases, and the C/O ratio of the resulting r-GO products, which can be largely attributed to additional reactions between trapped reaction intermediates. The work enriches the knowledge base of GO materials and offers insights for further tuning of the thermal reduction of GO solids to obtain high performance engineering graphene materials.
AB - Graphene oxide (GO) sheets have been used as a building block to construct various bulk forms of graphene structures such as films, fibers, foams, and dense solids. Thermal reduction of GO, where GO actually undergoes a disproportionation reaction to yield reduced GO (r-GO), accompanied by evolution of carbonaceous gases, has critical influence over the mechanical, thermal, and electrical properties and chemical stability of the resulting bulk graphene solids. Here, we report that this thermal reduction process is geometry-dependent for bulk GO solids, including the peak temperature of reaction, reaction rate, the chemical composition of released gases, and the C/O ratio of the resulting r-GO products, which can be largely attributed to additional reactions between trapped reaction intermediates. The work enriches the knowledge base of GO materials and offers insights for further tuning of the thermal reduction of GO solids to obtain high performance engineering graphene materials.
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U2 - 10.1021/acsmaterialslett.0c00423
DO - 10.1021/acsmaterialslett.0c00423
M3 - Article
AN - SCOPUS:85105027654
SN - 2639-4979
VL - 3
SP - 511
EP - 515
JO - ACS Materials Letters
JF - ACS Materials Letters
IS - 5
ER -