Reduced graphene aerogels as energy efficient selective oil sorbents
Graphene aerogels are widely used in the oil–water system as they possess high internal surface area and super-oleophilic properties. However, they tend to absorb water along with oil, and to overcome this problem; surface coatings are generally employed using expensive fluoro-silane compounds. It l...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-11-01
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| Series: | Energy Reports |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S235248472202011X |
| _version_ | 1828063342892154880 |
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| author | Junaid Saleem Moghal Zubair Khalid Baig Usman Bin Shahid Said Mansour Gordon McKay |
| author_facet | Junaid Saleem Moghal Zubair Khalid Baig Usman Bin Shahid Said Mansour Gordon McKay |
| author_sort | Junaid Saleem |
| collection | DOAJ |
| description | Graphene aerogels are widely used in the oil–water system as they possess high internal surface area and super-oleophilic properties. However, they tend to absorb water along with oil, and to overcome this problem; surface coatings are generally employed using expensive fluoro-silane compounds. It leads to an increase in production costs and environmental concerns. Herein, we report super-hydrophobic 3D graphene aerogels as selective oil sorbent for oil–water separation. The reduction of oxygen-containing functional groups on the surface of graphene aerogels has been studied and characterized with FTIR. The thermal treatment of up to 700 °C was carried out using an in-house flow system. The gases used to reduce graphene oxide aerogel are H2and N2with an optimized ratio of 5:95. The presence of H2significantly decreased the oxygen-containing functional groups in graphene aerogel. The increase in the C/O ratio results in higher uptake capacity due to higher surface area and pore volume. The thermal reduction yields a C/O ratio of 24:1, slightly higher than most reported values. |
| first_indexed | 2024-04-10T22:42:39Z |
| format | Article |
| id | doaj.art-723c47ab7b4044709e812a15a72f3f4c |
| institution | Directory Open Access Journal |
| issn | 2352-4847 |
| language | English |
| last_indexed | 2024-04-10T22:42:39Z |
| publishDate | 2022-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Energy Reports |
| spelling | doaj.art-723c47ab7b4044709e812a15a72f3f4c2023-01-16T04:08:15ZengElsevierEnergy Reports2352-48472022-11-018117123Reduced graphene aerogels as energy efficient selective oil sorbentsJunaid Saleem0Moghal Zubair Khalid Baig1Usman Bin Shahid2Said Mansour3Gordon McKay4Division of Sustainable Development, College of Science and Engineering, Hamad Bin Khalifa University, Qatar Foundation, Doha, Qatar; Corresponding author.Center for Advanced Materials, Qatar University, QatarDepartment of Chemical and Biological Engineering, The Hong Kong University of Science and Technology, Kowloon, Hong Kong, ChinaQatar Environment and Energy Research Institute, Hamad Bin Khalifa University, Qatar Foundation, Doha, QatarDivision of Sustainable Development, College of Science and Engineering, Hamad Bin Khalifa University, Qatar Foundation, Doha, QatarGraphene aerogels are widely used in the oil–water system as they possess high internal surface area and super-oleophilic properties. However, they tend to absorb water along with oil, and to overcome this problem; surface coatings are generally employed using expensive fluoro-silane compounds. It leads to an increase in production costs and environmental concerns. Herein, we report super-hydrophobic 3D graphene aerogels as selective oil sorbent for oil–water separation. The reduction of oxygen-containing functional groups on the surface of graphene aerogels has been studied and characterized with FTIR. The thermal treatment of up to 700 °C was carried out using an in-house flow system. The gases used to reduce graphene oxide aerogel are H2and N2with an optimized ratio of 5:95. The presence of H2significantly decreased the oxygen-containing functional groups in graphene aerogel. The increase in the C/O ratio results in higher uptake capacity due to higher surface area and pore volume. The thermal reduction yields a C/O ratio of 24:1, slightly higher than most reported values.http://www.sciencedirect.com/science/article/pii/S235248472202011XGrapheneAerogelThermal reductionOil sorptionOil–water separation |
| spellingShingle | Junaid Saleem Moghal Zubair Khalid Baig Usman Bin Shahid Said Mansour Gordon McKay Reduced graphene aerogels as energy efficient selective oil sorbents Energy Reports Graphene Aerogel Thermal reduction Oil sorption Oil–water separation |
| title | Reduced graphene aerogels as energy efficient selective oil sorbents |
| title_full | Reduced graphene aerogels as energy efficient selective oil sorbents |
| title_fullStr | Reduced graphene aerogels as energy efficient selective oil sorbents |
| title_full_unstemmed | Reduced graphene aerogels as energy efficient selective oil sorbents |
| title_short | Reduced graphene aerogels as energy efficient selective oil sorbents |
| title_sort | reduced graphene aerogels as energy efficient selective oil sorbents |
| topic | Graphene Aerogel Thermal reduction Oil sorption Oil–water separation |
| url | http://www.sciencedirect.com/science/article/pii/S235248472202011X |
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