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Superhydrophobic, mechanically flexible and recyclable reduced graphene oxide wrapped sponge for highly efficient oil/water separation

引用

Frontiers of Chemical Science and Engineering 2018年第3期12卷 390-399页

作者： Lijuan Qiu Ruiyang Zhang Ying Zhang Chengjin Li Qian Zhang Ying Zhou State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum University Chengdu 610500 China The Center of New Energy Materials and Technology School of Materials Science and Engineering Southwest Petroleum University Chengdu 610500 China

Water pollution has become an urgent issue for our modem society, and it is highly desirable to rapidly deal with the water pollution without secondary pollution. In this paper, we have prepared a reduced graphene oxide （RGO） wrapped sponge with superhydrophobicity and mechanically flexibility via a facile low-temperature thermal treatment method under a reducing atmosphere. The skeleton of this sponge is completely covered with RGO layers which are closely linked to the skeleton. This sponge has an abundant pore structure, high selectivity, good recyclability, low cost, and outstanding adsorption capacity for floating oil or heavy oil underwater. In addition, this sponge can maintain excellent adsorption performance for various oils and organic solvents over 50 cycles by squeezing, and exhibits extremely high separa- tion efficiencies, up to 6 × 10^6 and 3.6 × 10^6 L·m^-3.h^-1 in non-turbulent and turbulent water/oil systems, respec- tively. This superhydrophobic adsorbent with attractive properties may find various applications, especially in large-scale removal of organic contaminants and oil spill cleanup.

关键词： superhydrophobicity mechanically flexibility water/oil separation reduced graphene oxide wrapped sponge

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