| Low Temperature Hydrothermal Synthesis of Ultra-light and Superelastic Graphene Oxide/Cellulose Aerogels for Absorption of Organic Liquids |
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| Author Name | Affiliation | | Meng Wang1 | 1. Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing, 100083, China | | ChangYou Shao1 | 1. Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing, 100083, China | | SuKun Zhou1 | 1. Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing, 100083, China | | Jun Yang1,2,* | 1. Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing, 100083, China
2. State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou, Guangdong Province, 510640, China | | Feng Xu1 | 1. Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing, 100083, China |
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| Fund Project:This work was supported by the State Key Laboratory of Pulp and Paper Engineering (201750), Chinese Ministry of Education (113014A), National Natural Science Foundation of China (21404011, 21674013), and Chinese Ministry of Education (113014A). |
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| Abstract:Two-dimensional (2D) graphene oxide (GO) nanosheets and 1D 2,2,6,6-tetramethylpiperidin-1-oxyl (TEMPO)-oxidized cellulose nanofibers (TOCN) were assembled into GO/TOCN aerogels via a low temperature hydrothermal and freeze-drying process. The as-prepared GO/TOCN aerogels exhibited interconnected 3D network microstructures, a low density of 6.8 mg/cm3, a high porosity up to 99.2% and excellent mechanical flexibility. The high porosity in conjunction with their hydrophobicity (contact angle of 121.5°), allowed the aerogels to absorb different organic liquids with absorption capacities up to 240 times of their own weight, depending on the density of the liquids. These results indicated that the aerogels were excellent candidates as sorbent materials for the clean-up of organic liquids. After five absorption-desorption cycles, the absorption capacity of the TOCN carbon aerogels could be regenerated up to 97% of the initial absorption capability, which demonstrated their excellent recyclability. |
| keywords:graphene oxide cellulose nanofiber carbon aerogel |
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