Journal
ACS NANO
Volume 17, Issue 18, Pages 18392-18401Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.3c05792
Keywords
Nanosheet; Nanofiber; Polyacrylonitrile; Crystallization; Superhydrophobic
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A versatile method for synthesizing nanostructured carbon materials based on flower-like PAN chemistry is reported. The resulting PAN superstructures can be easily converted to carbon superstructures. Surface modification of the nanostructured films resulted in high surface roughness and a contact angle of approximately 180 degrees. This study offers a strategy for the synthesis of nanostructured carbon materials for various applications.
Carbon superstructures are widely applied in energy and environment-related areas. Among them, the flower-like polyacrylonitrile (PAN)-derived carbon materials have shown great promise due to their high surface area, large pore volume, and improved mass transport. In this work, we report a versatile and straightforward method for synthesizing one-dimensional (1D) nanostructured fibers and two-dimensional (2D) nanostructured thin films based on flower-like PAN chemistry by taking advantage of the nucleation and growth behavior of PAN. The resulting nanofibers and thin films exhibited distinct morphologies with intersecting PAN nanosheets, which formed through rapid nucleation on existing PAN. We further constructed a variety of hierarchical PAN superstructures based on different templates, solvents, and concentrations. These PAN nanosheet superstructures can be readily converted to carbon superstructures. As a demonstration, the nanostructured thin film exhibited a contact angle of similar to 180 degrees after surface modification with fluoroalkyl monolayers, which is attributed to high surface roughness enabled by the nanosheet assemblies. This study offers a strategy for the synthesis of nanostructured carbon materials for various applications.
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