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All Journal International Journal of Acta Material
T. Azis
Department of Chemistry, Faculty of Mathematics and Natural Sciences, Halu Oleo University, Kampus Hijau Bumi Tridharma, Anduonohu, Kendari, Sulawesi Tenggara 93232, Indonesia
Chemistry Materials Science & Nanotechnology Physics

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The Effect of Doping Concentration in the Work Electrodes of Graphene-MnxOy and Test on Glucose by Cyclic Voltametry L Agusu; T. Azis; Imran; Fitrianti; A. T. Nurwahida; S. Misudo; Alimin
International Journal of Acta Material Vol. 1 No. 1 (2024): August 2024
Publisher : Faculty Mathematics and Natural Sciences, Halu Oleo University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62749/ijactmat.v1i1.5

Abstract

A study was conducted to investigate the impact of concentration on the graphene-manganese oxide (EPG/MnxOy) working electrode for glucose analysis using the cyclic voltammetry method. To characterize the electrode material, SEM-EDX, FTIR, and XRD analyses were performed. The results revealed that the graphene surface contained aggregates in the form of small particles attached to the graphene. Various absorption bands corresponding to aliphatic -O-H, -C-H, -C=C aromatic, -C=O, -C=C, -C-O, and Mn-O groups were identified in the graphene and graphene/MnxOy materials. Crystal patterns of manganese oxide were also identified at angles 2q = 30.57o and 44.39o, representing the Mn3O4 crystal pattern, at the angle 2q=34.12o denoting the MnO2 crystal pattern, and at angles 2q= 39.85o, 57.85o, and 68.94o representing the MnO crystal patterns. The optimal electrode composition was found to be graphene:MnxOy 0.8:0.5, as indicated by an anodic peak current (Ipa) of 122 µA at a potential of -0.11 V. The most effective supporting electrolyte was determined to be NaNO3, with an anodic peak current (Ipa) of 26.4 µA at a potential of -0.13 V. The detection limit for glucose was 4.45×10-3 M. The repeatability test of EPG/MnxOy yielded a result of 1.77%.
Effect of Adding Hydrochloric Acid to Alumina Oxide (LAO) Clay on Adsorption Capacity of Pb and Cd Metal Ions C.M. Bijang; T. Azis; T. Timisela; Nohong; A. T. Nurwahida
International Journal of Acta Material Vol. 1 No. 1 (2024): August 2024
Publisher : Faculty Mathematics and Natural Sciences, Halu Oleo University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62749/ijactmat.v1i1.8

Abstract

Research has been conducted on the application of Ouw Natural Clay (LAO) as an adsorbent for Pb metal ions and Cd metal ions, following the addition of hydrochloric acid (HCl). The concentrations of HCl used were 2, 3, and 4 M. Characterization was performed to evaluate the differences in clay characteristics before and after the addition of HCl. The Surface Area Analyzer (SAA) was utilized for characterization, specifically to determine the specific surface area, pore volume, and pore size. The results of the characterization indicated an increase in specific surface area, from 31.37 m2/g for pure LAO to 99.68 m2/g for LAO-HCl 4 M. Furthermore, the addition of hydrochloric acid to the Ouw clay natural resulted in a reduction in the capacity to adsorb Pb metal ions and Cd metal ions.
Co-Authors A. T. Nurwahida Alimin C.M. Bijang Fitrianti Imran L Agusu Nohong S. Misudo T. Timisela