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4 years ago

Oriented Arrangement: The Origin of Versatility for Porous Graphene Materials

Oriented Arrangement: The Origin of Versatility for Porous Graphene Materials
Qile Fang, Zhaoping Liu, Heran Huang, Jingbo Ma, Xufeng Zhou, Wei Deng
Macroscopic porous graphene materials composed of graphene sheets have demonstrated their advantageous aspects in diverse application areas. It is essential to maximize their excellent performances by rationally controlling the sheet arrangement and pore structure. Bulk porous graphene materials with oriented pore structure and arrangement of graphene sheets are prepared by marrying electrolyte-assisted self-assembly and shear-force-induced alignment of graphene oxide sheets, and the super elasticity and anisotropic mechanical, electrical, and thermal properties induced by this unique structure are systematically investigated. Its application in pressure sensing exhibits ultrahigh sensitivity of 313.23 kPa−1 for detecting ultralow pressure variation below 0.5 kPa, and it shows high retention rate for continuously intercepting dye molecules with a high flux of ≈18.7 L m−2 h−1 bar−1 and a dynamic removal rate of 510 mg m−2 h−1. Macroscopic graphene foam with oriented arrangement of graphene sheets and pore structure is prepared by the electrolyte-assisted and shear-arranged method. Such a unique architecture endows this novel graphene material with anisotropic mechanical, electrical and thermal properties and superior elasticity, which make it suitable for versatile applications, such as a high-sensitivity pressure sensor and organic pollutant removal membrane with high flux.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/smll.201701231

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