Superhydrophobic kaolinite modified graphene oxide-melamine sponge with excellent properties for oil-water separation
| Autor: | Guangming Zeng, Hui Li, Kai He, Lei Yuan, Tiantian Huang, Liang Hu, Min Peng, Zhenzhen Huang, Jiangbo Shi, Guiqiu Chen, Anwei Chen |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Graphene Oxide Geology 02 engineering and technology Surface finish 010501 environmental sciences 021001 nanoscience & nanotechnology 01 natural sciences law.invention Contact angle chemistry.chemical_compound Diesel fuel Adsorption chemistry Chemical engineering Geochemistry and Petrology law Kaolinite 0210 nano-technology Melamine 0105 earth and related environmental sciences |
| Zdroj: | Applied Clay Science. 163:63-71 |
| ISSN: | 0169-1317 |
| Popis: | In this work, a facile and cost-effective method was reported to fabricate a novel, robust, and superhydrophobic kaolinite modified graphene oxide-melamine sponge (K-GOMS). The GO sheets were used to increase the roughness of the sponge smooth surface. The hydrophobic kaolinite adhered on GO sheets significantly enhanced the superhydrophobicity of the K-GOMS surface with a water contact angle of 152.3°. Several organic solvents and oils were selected to test the adsorption performance of the obtained adsorbents. The results revealed that the superhydrophobic K-GOMS exhibited not only superior adsorption capacity for various organic solvents and oils, from 60 to 113 times of its own weight, but also outstanding recyclability with an adsorption capacity retention higher than 94% after 30 cycles of diesel oil adsorption, and excellent environmental tolerance in wide range of pH values and temperatures. Therefore, this study provides an effective way for constructing facile, low-cost, and large-scale production of superhydrophobic adsorbents for oil-water separation. |
| Databáze: | OpenAIRE |
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