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Received March 29, 2021
Accepted August 24, 2021
articles This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Nanocomposite design of graphene modified TiO2 for electrochemical sensing in phenol detection

Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Halu Oleo, Kendari 93232 - Southeast Sulawesi, Indonesia 1Department of Mathematics and Natural Sciences, Institute Agama Islam Negeri (IAIN), Kendari 93563 - Southeast Sulawesi, Indonesia 2Department of Environmental Engineering, Universitas Muhammadiyah Kendari, Kendari 93127 - Southeast Sulawesi, Indonesia 3Institute of Microengineering and Nanoelectronics, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia
Korean Journal of Chemical Engineering, January 2022, 39(1), 209-215(7), 10.1007/s11814-021-0938-6
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Abstract

This study is the stage of developing a phenol detection electrochemical sensor. Phenol is one of the organic pollutants harmful to human life and ecosystems. The development of this sensor was carried out by studying the use of TiO2 anatase as a modifier of graphene electrodes. The mass of TiO2 anatase was varied, while the mass of graphene and paraffin was fixed. The results showed that the TiO2 mass of 1.0 g was the best mass as a graphene electrode modifier. The use of this mass increases the oxidation current (Ipa) of phenol by 450 A, which is observed at an oxidation potential (Epa) of -0.30V. The presence of interfering ions such as K+, Fe2+, and OH? can decrease the measurement current. However, based on the %RSD value, it shows that the performance of TiO2-graphene is in a good category, where the %RSD value obtained is 0.6%. TiO2-graphene electrodes can be used repeatedly for 12 days. Overall, this work demonstrates the potential of TiO2-graphene electrodes as electrode candidates for electrochemical-based phenol sensors.

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