Article Title
Three-dimensional porous graphene sponges assembled with the combination of surfactant and freeze-drying
Authors
Rujing Zhang, School of Materials Science and Engineering, State Key Laboratory of New Ceramics and Fine Processing, Key Laboratory of Materials Processing Technology of MOE, Tsinghua University, Beijing 100084, China
Yachang Cao, School of Materials Science and Engineering, State Key Laboratory of New Ceramics and Fine Processing, Key Laboratory of Materials Processing Technology of MOE, Tsinghua University, Beijing 100084, China
Peixu Li, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China
Xiaobei Zang, School of Materials Science and Engineering, State Key Laboratory of New Ceramics and Fine Processing, Key Laboratory of Materials Processing Technology of MOE, Tsinghua University, Beijing 100084, China
Pengzhan Sun, School of Materials Science and Engineering, State Key Laboratory of New Ceramics and Fine Processing, Key Laboratory of Materials Processing Technology of MOE, Tsinghua University, Beijing 100084, China
Kunlin Wang, School of Materials Science and Engineering, State Key Laboratory of New Ceramics and Fine Processing, Key Laboratory of Materials Processing Technology of MOE, Tsinghua University, Beijing 100084, China
Minlin Zhong, School of Materials Science and Engineering, State Key Laboratory of New Ceramics and Fine Processing, Key Laboratory of Materials Processing Technology of MOE, Tsinghua University, Beijing 100084, China
Jinquan Wei, School of Materials Science and Engineering, State Key Laboratory of New Ceramics and Fine Processing, Key Laboratory of Materials Processing Technology of MOE, Tsinghua University, Beijing 100084, China
Dehai Wu, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China
Feiyu Kang, School of Materials Science and Engineering, State Key Laboratory of New Ceramics and Fine Processing, Key Laboratory of Materials Processing Technology of MOE, Tsinghua University, Beijing 100084, China
Advanced Materials Institute, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China
Hongwei Zhu, School of Materials Science and Engineering, State Key Laboratory of New Ceramics and Fine Processing, Key Laboratory of Materials Processing Technology of MOE, Tsinghua University, Beijing 100084, China
Advanced Materials Institute, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China
Center for Nano and Micro Mechanics, Tsinghua University, Beijing 100084, China
Keywords
graphene sponge, hierarchical, freezing media, porous, foams
Abstract
With the combination of surfactant and freeze-drying, we have developed two kinds of graphene spongy structures. On the one hand, using foams of soap bubbles as templates, three-dimensional porous graphene sponges with rich hierarchical pores have been synthesized. Pores of the material contain three levels of length scales, including millimeter, micrometer and nanometer. The structure can be tuned by changing the freezing media, adjusting the stirring rate or adding functional additives. On the other hand, by direct freeze-drying of a graphene oxide/surfactant suspension, a porous framework with directionally aligned pores is prepared. The surfactant gives a better dispersion of graphene oxide sheets, resulting in a high specific surface area. Both of the obtained materials exhibit excellent absorption capacity and good compression performance, providing a broad range of possible applications, such as absorbents, storage media, and carriers.
Graphical Abstract
Publisher
Tsinghua University Press
Recommended Citation
Rujing Zhang,Yachang Cao,Peixu Li,Xiaobei Zang,Pengzhan Sun,Kunlin Wang,Minlin Zhong,Jinquan Wei,Dehai Wu,Feiyu Kang,Hongwei Zhu, Three-dimensional porous graphene sponges assembled with the combination of surfactant and freeze-drying. NanoRes.2014, 7(10): 1477–1487
