Performance of The Composite Electrode of Reduced Graphene Oxide Palm Oil Shell - Zinc Oxide (rGOCKS - ZnO) as a Chemical Oxygen Demand (COD) Sensor by Photoelectrocatalysis

Authors

Thamrin Azis University of Halu Oleo
Muhammad Z. Muzakkari University of Halu Oleo
Muh. Nurdin University of Halu Oleo
Maulidiyah Maulidiyah University of Halu Oleo
Wa O. Muslia University of Halu Oleo
Catherina M. Bijang University of Pattimura
Tahril Tahril Universitas Tadulako

DOI:

https://doi.org/10.22487/j24775185.2023.v12.i2.pp123-131

Keywords:

Cocoa shell charcoal, reduced graphene oxide (rGO), zinc oxide (ZnO), COD sensor, photo electrocatalysis

Abstract

The preparation of reduced graphene oxide composite electrodes from palm shells (rGOCKS-ZnO) as a chemical oxygen demand (COD) sensor by photoelectrocatalysis has been successfully carried out. The preparation of rGO_PS- ZnO electrodes by thermal reduction method and modified Hummer. The XRD results showed several peaks of rGOCKS - ZnO namely 23.287 º, 26.781 °, 29.889 °, 32.468 °, 35.109 °, 37.14 °, 39.822 °, 43.559 °, 47.927 °, and 48.537 °. SEM-EDX analysis reveals the surface of graphene sheets containing aggregates in the shape of small particles attached to graphene sheets. The results of the EDX analysis consisted of C 67.82 %, O. 19.2 %, Zn. 7.85 % and 5.13 % impurity. The CV and LSV tests showed that the rGOAK - ZnO electrode with a variation of 1 gram: 0.3 gram had a good response to the oxidation process under visible light. The profile tests of these organic dyes (methylene blue) in concentrations of 0.5 ppm, 1.0 ppm, 2.0 ppm, and 3.0 ppm were applied by Multi Pulse Amperometry (MPA). The performance of the rGO_PS- ZnO electrode has been in determining the value of COD by photo electrocatalytic good sensitivity, linearity, limit of detection, repeatability, and service life. The COD value was determined using the rGO_PS- ZnO electrode and obtained 2.97897 mg/LO2 close to the theoretical value.

Author Biographies

Thamrin Azis, University of Halu Oleo

Department of Chemistry, Faculty of Mathematics and Natural Sciences

Muhammad Z. Muzakkari, University of Halu Oleo

Department of Chemistry, Faculty of Mathematics and Natural Sciences

Muh. Nurdin, University of Halu Oleo

Department of Chemistry, Faculty of Mathematics and Natural Sciences

Maulidiyah Maulidiyah, University of Halu Oleo

Department of Chemistry, Faculty of Mathematics and Natural Sciences

Wa O. Muslia, University of Halu Oleo

Department of Chemistry, Faculty of Mathematics and Natural Sciences

Catherina M. Bijang, University of Pattimura

Chemistry Department, Faculty of Mathematics and Natural Sciences

Tahril Tahril, Universitas Tadulako

Chemistry Education Study Program/ Department of Mathematics and Natural Science Education, Faculty of Teacher Training and Education

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Published

2023-05-31

How to Cite

Azis, T. ., Muzakkari, M. Z. ., Nurdin, M. ., Maulidiyah, M., Muslia, W. O. ., Bijang, C. M. ., & Tahril, T. (2023). Performance of The Composite Electrode of Reduced Graphene Oxide Palm Oil Shell - Zinc Oxide (rGOCKS - ZnO) as a Chemical Oxygen Demand (COD) Sensor by Photoelectrocatalysis. Jurnal Akademika Kimia, 12(2), 123-131. https://doi.org/10.22487/j24775185.2023.v12.i2.pp123-131

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Vol. 12 No. 2 (2023)

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Copyright (c) 2023 Thamrin Azis, Muhammad Z. Muzakkari, Muh. Nurdin, Maulidiyah Maulidiyah, Wa O. Muslia, Catherina M. Bijang, Tahril Tahril

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