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@article{ART002695582},
author={Ismail Zulhelmi},
title={Photo-Fenton-inspired deoxygenation of tea polyphenol–graphene by household bleach},
journal={Carbon Letters},
issn={1976-4251},
year={2020},
volume={30},
number={4},
pages={449-456},
doi={10.1007/s42823-019-00114-z}

TY - JOUR
AU - Ismail Zulhelmi
TI - Photo-Fenton-inspired deoxygenation of tea polyphenol–graphene by household bleach
JO - Carbon Letters
PY - 2020
VL - 30
IS - 4
PB - Korean Carbon Society
SP - 449
EP - 456
SN - 1976-4251
AB - 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 difcult and the application of centrifugation or fltration alone for the purifcation 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 purifcation 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 signifcantly after being purifed 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 purifed 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 afect 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 purifcation strategy would assist in the washing issue of polyphenol-stabilized graphene for various future electronic applications.
KW - Graphene · Purifcation · Bleach · Polyphenols · Liquid-phase exfoliation
DO - 10.1007/s42823-019-00114-z
ER -

Ismail Zulhelmi. (2020). Photo-Fenton-inspired deoxygenation of tea polyphenol–graphene by household bleach. Carbon Letters, 30(4), 449-456.

Ismail Zulhelmi. 2020, "Photo-Fenton-inspired deoxygenation of tea polyphenol–graphene by household bleach", Carbon Letters, vol.30, no.4 pp.449-456. Available from: doi:10.1007/s42823-019-00114-z

Ismail Zulhelmi "Photo-Fenton-inspired deoxygenation of tea polyphenol–graphene by household bleach" Carbon Letters 30.4 pp.449-456 (2020) : 449.

Ismail Zulhelmi. Photo-Fenton-inspired deoxygenation of tea polyphenol–graphene by household bleach. 2020; 30(4), 449-456. Available from: doi:10.1007/s42823-019-00114-z

Ismail Zulhelmi. "Photo-Fenton-inspired deoxygenation of tea polyphenol–graphene by household bleach" Carbon Letters 30, no.4 (2020) : 449-456.doi: 10.1007/s42823-019-00114-z

Ismail Zulhelmi. Photo-Fenton-inspired deoxygenation of tea polyphenol–graphene by household bleach. Carbon Letters, 30(4), 449-456. doi: 10.1007/s42823-019-00114-z

Ismail Zulhelmi. Photo-Fenton-inspired deoxygenation of tea polyphenol–graphene by household bleach. Carbon Letters. 2020; 30(4) 449-456. doi: 10.1007/s42823-019-00114-z

Ismail Zulhelmi. Photo-Fenton-inspired deoxygenation of tea polyphenol–graphene by household bleach. 2020; 30(4), 449-456. Available from: doi:10.1007/s42823-019-00114-z

Ismail Zulhelmi. "Photo-Fenton-inspired deoxygenation of tea polyphenol–graphene by household bleach" Carbon Letters 30, no.4 (2020) : 449-456.doi: 10.1007/s42823-019-00114-z