Journal
KOREAN JOURNAL OF CHEMICAL ENGINEERING
Volume 39, Issue 1, Pages 209-215Publisher
KOREAN INSTITUTE CHEMICAL ENGINEERS
DOI: 10.1007/s11814-021-0938-6
Keywords
Anatase TiO2; Electrochemical Sensor; Electrode Modifier; Graphene; Phenol
Funding
- Ministry of Education and Culture of the Republic of Indonesia [270/E4.1/AK.04.PT/2021]
- Ministry of Education, Culture, Research and Technology of the Republic of Indonesia [2817/E4.1/KK.04.05/2021]
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This study developed an electrochemical sensor for detecting phenol using TiO2-anatase as a modifier for graphene electrodes. The optimal mass of TiO2-anatase was found to be 1.0 g, which increased the oxidation current of phenol. The sensor showed good performance with a low %RSD value.
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 (I-pa) of phenol by 450 A, which is observed at an oxidation potential (E-pa) of -0.30 V. 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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