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Graphene Aerogel Synthesis.pdf (533.29 kB)

Synthesis of Polyacetylene-like Modified Graphene Oxide Aerogel and Its Enhanced Electrical Properties

preprint
submitted on 08.06.2019, 17:20 and posted on 10.06.2019, 19:23 by Enrico Greco, Jing Shang, jiali zhu, Tong Zhu

A graphene-based or carbon-based aerogel is a three-dimensional (3D) solid material in which the carbon atoms are arranged in a sheet-like nanostructure. In this study, we report the synthesis of low-density polymer-modified aerogel monoliths by 3D macro-assemblies of graphene oxide sheets that exhibit significant internal surface areas (982 m2/g) and high electrical conductivity (∼0.1 to 1 × 102 S/cm). Different types of materials were prepared to obtain a single monolithic solid starting from a suspension of single-layer graphene oxide (GO) sheets, and a polymer, made from the precursors 4-carboxybenzaldehyde and polyvinyl alcohol. These materials were used to cross-link the individual sheets by covalent bonds, resulting in wet-gels that were supercritically dried and then, in some cases, thermally reduced to yield graphene aerogel composites. The average densities were approaching 15-20 mg/cm3. This approach allowed for the modulation of distance between the sheets, pore dimension, surface area, and related properties. This specific GO/Polymer ratio has suitable malleability making it a viable candidate for use in conductivity 3D printing; it also has other properties suitable for energy storage, catalysis, sensing and biosensing applications, bioelectronics, and superconductors.

Funding

National Natural Science Foundation of China n. 21876003

National Natural Science Foundation of China n. 21577003

National Natural Science Foundation of China n. 41421064

National Key Research and Development Program of China (No. 2016YFC0202200).

History

Email Address of Submitting Author

enrico.greco@pku.edu.cn

Institution

Peking University

Country

China

ORCID For Submitting Author

0000-0003-1564-4661

Declaration of Conflict of Interest

The authors declare no conflict of interest

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