Three different types of tea as surfactant in liquid exfoliation of graphite : Green tea, black tea and oolong tea
Liquid phase exfoliation (LPE) with surfactant-assisted is a method to produce graphene that used water and surfactant as solvent. Tea is one of possible surfactants that can be used in LPE of graphite as it reduced the surface tension energy of water (72.75 mJ m-2) to ∼40-50 mJ m-2 which is suitabl...
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| Format: | Conference or Workshop Item |
| Language: | English |
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IOP Publishing Ltd
2019
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| Online Access: | http://umpir.ump.edu.my/id/eprint/35834/ http://umpir.ump.edu.my/id/eprint/35834/1/Three%20different%20types%20of%20tea%20as%20surfactant%20in%20liquid%20exfoliation%20of%20graphite_Green%20tea%2C%20black%20tea%20and%20oolong%20tea.pdf |
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| author | Fadwa Sameeha, Ismail Kamal, Yusoh Anis Sakinah, Zainal Abidin Abu Hannifa, Abdullah Zulhelmi, Ismail |
| author_facet | Fadwa Sameeha, Ismail Kamal, Yusoh Anis Sakinah, Zainal Abidin Abu Hannifa, Abdullah Zulhelmi, Ismail |
| author_sort | Fadwa Sameeha, Ismail |
| building | UMP Institutional Repository |
| collection | Online Access |
| description | Liquid phase exfoliation (LPE) with surfactant-assisted is a method to produce graphene that used water and surfactant as solvent. Tea is one of possible surfactants that can be used in LPE of graphite as it reduced the surface tension energy of water (72.75 mJ m-2) to ∼40-50 mJ m-2 which is suitable level to exfoliate graphite. Three different types of tea were used as surfactant through one-step production of graphene which were green tea (GT), black tea (BT) and oolong tea (OT). The exfoliation of graphite in each tea solutions were successful as the UV spectra of supernatant samples show peak at 270 nm which indicates the C-C bond of graphene flakes. Morphology analysis (AFM) of resulted graphene samples show that graphene sheets have sharp edges caused by sonication process. The effect of sonication time was being investigated in this work. Green tea has higher exponent factor of time (1.715) compare to black tea (1.033) and oolong tea (0.762) due to high quantity of small molecules of polyphenols present in green tea solution. Thus, it is better to used GT as surfactant in LPE of graphite compare to BT and OT. |
| first_indexed | 2025-11-15T03:20:05Z |
| format | Conference or Workshop Item |
| id | ump-35834 |
| institution | Universiti Malaysia Pahang |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T03:20:05Z |
| publishDate | 2019 |
| publisher | IOP Publishing Ltd |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | ump-358342023-05-17T06:46:42Z http://umpir.ump.edu.my/id/eprint/35834/ Three different types of tea as surfactant in liquid exfoliation of graphite : Green tea, black tea and oolong tea Fadwa Sameeha, Ismail Kamal, Yusoh Anis Sakinah, Zainal Abidin Abu Hannifa, Abdullah Zulhelmi, Ismail T Technology (General) TJ Mechanical engineering and machinery TP Chemical technology TS Manufactures Liquid phase exfoliation (LPE) with surfactant-assisted is a method to produce graphene that used water and surfactant as solvent. Tea is one of possible surfactants that can be used in LPE of graphite as it reduced the surface tension energy of water (72.75 mJ m-2) to ∼40-50 mJ m-2 which is suitable level to exfoliate graphite. Three different types of tea were used as surfactant through one-step production of graphene which were green tea (GT), black tea (BT) and oolong tea (OT). The exfoliation of graphite in each tea solutions were successful as the UV spectra of supernatant samples show peak at 270 nm which indicates the C-C bond of graphene flakes. Morphology analysis (AFM) of resulted graphene samples show that graphene sheets have sharp edges caused by sonication process. The effect of sonication time was being investigated in this work. Green tea has higher exponent factor of time (1.715) compare to black tea (1.033) and oolong tea (0.762) due to high quantity of small molecules of polyphenols present in green tea solution. Thus, it is better to used GT as surfactant in LPE of graphite compare to BT and OT. IOP Publishing Ltd 2019-12-09 Conference or Workshop Item PeerReviewed pdf en cc_by http://umpir.ump.edu.my/id/eprint/35834/1/Three%20different%20types%20of%20tea%20as%20surfactant%20in%20liquid%20exfoliation%20of%20graphite_Green%20tea%2C%20black%20tea%20and%20oolong%20tea.pdf Fadwa Sameeha, Ismail and Kamal, Yusoh and Anis Sakinah, Zainal Abidin and Abu Hannifa, Abdullah and Zulhelmi, Ismail (2019) Three different types of tea as surfactant in liquid exfoliation of graphite : Green tea, black tea and oolong tea. In: IOP Conference Series: Materials Science and Engineering; 1st Process Systems Engineering and Safety Symposium 2019, ProSES 2019 , 4 September 2019 , Kuantan, Pahang, Malaysia. pp. 1-9., 702 (1). ISSN 1757-8981 (Published) https://doi.org/10.1088/1757-899X/702/1/012036 |
| spellingShingle | T Technology (General) TJ Mechanical engineering and machinery TP Chemical technology TS Manufactures Fadwa Sameeha, Ismail Kamal, Yusoh Anis Sakinah, Zainal Abidin Abu Hannifa, Abdullah Zulhelmi, Ismail Three different types of tea as surfactant in liquid exfoliation of graphite : Green tea, black tea and oolong tea |
| title | Three different types of tea as surfactant in liquid exfoliation of graphite : Green tea, black tea and oolong tea |
| title_full | Three different types of tea as surfactant in liquid exfoliation of graphite : Green tea, black tea and oolong tea |
| title_fullStr | Three different types of tea as surfactant in liquid exfoliation of graphite : Green tea, black tea and oolong tea |
| title_full_unstemmed | Three different types of tea as surfactant in liquid exfoliation of graphite : Green tea, black tea and oolong tea |
| title_short | Three different types of tea as surfactant in liquid exfoliation of graphite : Green tea, black tea and oolong tea |
| title_sort | three different types of tea as surfactant in liquid exfoliation of graphite : green tea, black tea and oolong tea |
| topic | T Technology (General) TJ Mechanical engineering and machinery TP Chemical technology TS Manufactures |
| url | http://umpir.ump.edu.my/id/eprint/35834/ http://umpir.ump.edu.my/id/eprint/35834/ http://umpir.ump.edu.my/id/eprint/35834/1/Three%20different%20types%20of%20tea%20as%20surfactant%20in%20liquid%20exfoliation%20of%20graphite_Green%20tea%2C%20black%20tea%20and%20oolong%20tea.pdf |