Photo-Fenton-inspired deoxygenation of tea polyphenol–graphene by household bleach
A liquid-phase exfoliation of few-layer graphene in tea is considered as one of the alternative approaches for the preparation of environment-friendly graphene. However, the removal of chemically adsorbed tea-polyphenols from graphene is known to be difficult and the application of centrifugation or...
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| Format: | Article |
| Language: | English |
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Springer
2020
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| Online Access: | http://umpir.ump.edu.my/id/eprint/28866/1/Photo-Fenton-inspired%20deoxygenation%20of%20tea%20polyphenol%E2%80%93graphene%20by%20household%20bleach.pdf |
| _version_ | 1825813428158070784 |
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| author | Zulhelmi, Ismail |
| author_facet | Zulhelmi, Ismail |
| author_sort | Zulhelmi, Ismail |
| collection | UMP |
| description | A liquid-phase exfoliation of few-layer graphene in tea is considered as one of the alternative approaches for the preparation of environment-friendly graphene. However, the removal of chemically adsorbed tea-polyphenols from graphene is known to be difficult and the application of centrifugation or filtration alone for the purification of graphene against tea-polyphenols is regarded to be almost technically impossible. Notably, a strategy for facile deoxygenation of tea-graphene must be established for a green and economical production of graphene to be realized. In this work, a simple purification method of graphene through the application of merely a household bleach (Clorox®) after the pre-exfoliation in black tea has been proposed. It has been found that the carbon–oxygen (C/O) value for graphene increases from 2.7 to 8.1 while the values of C–OH, C–O–C and C=O region in the C1s spectrum of graphene decrease significantly after being purified in bleach for 5 h. The stretching and shift of C–OH, C=O and C–O–C at 3468 cm−1, 1637 cm−1 and 1008 cm−1 from IR spectrum of purified graphene seems to be in agreement with the produced data from the XPS and Raman spectroscopy. Despite the enhanced ID/IG of Raman from the hybridization of sp2 by hydroxylation, the deoxygenation of tea-graphene does not negatively affect the electrical performance since the sheet resistance was impressively reduced to 193 Ω from 2.1 kΩ. It is believed that this photo-Fenton-inspired purification strategy would assist in the washing issue of polyphenol-stabilized graphene for various future electronic applications. |
| first_indexed | 2024-03-06T12:43:52Z |
| format | Article |
| id | UMPir28866 |
| institution | Universiti Malaysia Pahang |
| language | English |
| last_indexed | 2024-03-06T12:43:52Z |
| publishDate | 2020 |
| publisher | Springer |
| record_format | dspace |
| spelling | UMPir288662020-08-10T02:13:51Z http://umpir.ump.edu.my/id/eprint/28866/ Photo-Fenton-inspired deoxygenation of tea polyphenol–graphene by household bleach Zulhelmi, Ismail QC Physics TK Electrical engineering. Electronics Nuclear engineering TP Chemical technology A liquid-phase exfoliation of few-layer graphene in tea is considered as one of the alternative approaches for the preparation of environment-friendly graphene. However, the removal of chemically adsorbed tea-polyphenols from graphene is known to be difficult and the application of centrifugation or filtration alone for the purification of graphene against tea-polyphenols is regarded to be almost technically impossible. Notably, a strategy for facile deoxygenation of tea-graphene must be established for a green and economical production of graphene to be realized. In this work, a simple purification method of graphene through the application of merely a household bleach (Clorox®) after the pre-exfoliation in black tea has been proposed. It has been found that the carbon–oxygen (C/O) value for graphene increases from 2.7 to 8.1 while the values of C–OH, C–O–C and C=O region in the C1s spectrum of graphene decrease significantly after being purified in bleach for 5 h. The stretching and shift of C–OH, C=O and C–O–C at 3468 cm−1, 1637 cm−1 and 1008 cm−1 from IR spectrum of purified graphene seems to be in agreement with the produced data from the XPS and Raman spectroscopy. Despite the enhanced ID/IG of Raman from the hybridization of sp2 by hydroxylation, the deoxygenation of tea-graphene does not negatively affect the electrical performance since the sheet resistance was impressively reduced to 193 Ω from 2.1 kΩ. It is believed that this photo-Fenton-inspired purification strategy would assist in the washing issue of polyphenol-stabilized graphene for various future electronic applications. Springer 2020-08 Article PeerReviewed pdf en http://umpir.ump.edu.my/id/eprint/28866/1/Photo-Fenton-inspired%20deoxygenation%20of%20tea%20polyphenol%E2%80%93graphene%20by%20household%20bleach.pdf Zulhelmi, Ismail (2020) Photo-Fenton-inspired deoxygenation of tea polyphenol–graphene by household bleach. Carbon Letters, 30 (4). pp. 449-456. ISSN 1976-4251. (Published) https://doi.org/10.1007/s42823-019-00114-z https://doi.org/10.1007/s42823-019-00114-z |
| spellingShingle | QC Physics TK Electrical engineering. Electronics Nuclear engineering TP Chemical technology Zulhelmi, Ismail Photo-Fenton-inspired deoxygenation of tea polyphenol–graphene by household bleach |
| title | Photo-Fenton-inspired deoxygenation of tea polyphenol–graphene by household bleach |
| title_full | Photo-Fenton-inspired deoxygenation of tea polyphenol–graphene by household bleach |
| title_fullStr | Photo-Fenton-inspired deoxygenation of tea polyphenol–graphene by household bleach |
| title_full_unstemmed | Photo-Fenton-inspired deoxygenation of tea polyphenol–graphene by household bleach |
| title_short | Photo-Fenton-inspired deoxygenation of tea polyphenol–graphene by household bleach |
| title_sort | photo fenton inspired deoxygenation of tea polyphenol graphene by household bleach |
| topic | QC Physics TK Electrical engineering. Electronics Nuclear engineering TP Chemical technology |
| url | http://umpir.ump.edu.my/id/eprint/28866/1/Photo-Fenton-inspired%20deoxygenation%20of%20tea%20polyphenol%E2%80%93graphene%20by%20household%20bleach.pdf |
| work_keys_str_mv | AT zulhelmiismail photofentoninspireddeoxygenationofteapolyphenolgraphenebyhouseholdbleach |