Bayu, Indra (2024) Deteksi Oksalat Secara Elektrokimia Menggunakan Screen-Printed Carbon Electrode Termodifikasi Tinta Karbon Konduktif/Ni-Nanopartikel. Masters thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Pengembangan elektroda Screen-Printed Carbon Electrode (SPCE) termodifikasi tinta karbon konduktif dan Nikel nanopartikel untuk mendeteksi asam oksalat secara elektrokimia telah dilakukan. Sintesis Nikel nanopartikel dilakukan melalui metode elektrolisis dengan potensial 55 V. Tinta karbon konduktif dikombinasikan dengan Nikel nanopartikel untuk meningkatkan kinerja elektroda. Kinerja elektroda dievaluasi menggunakan metode voltametri siklik terhadap larutan asam oksalat pada rentang potensial -0,5 V hingga 1,5 V. Hasil pengujian menunjukkan bahwa elektroda SPCE termodifikasi tinta karbon konduktif dan Nikel nanopartikel mampu mendeteksi asam oksalat pada larutan. Puncak oksidasi asam oksalat muncul pada kurva anodik di potensial 1,2 V. Analisis kurva linear menunjukkan bahwa terdapat korelasi antara konsentrasi asam oksalat dan arus puncak anodik. Batas deteksi elektroda terhadap asam oksalat diperoleh sebesar 0,45 mM. Sensitivitas elektroda diperoleh sebesar 4,31×10-2 μA mM-1cm-2. Pengujian variasi scan rate menunjukkan bahwa reaksi interaksi yang terjadi pada antarmuka elektroda dikontrol oleh proses difusi. Uji repeatability dan reproducibility menunjukkan hasil yang stabil ketika proses diulang hingga 15 kali, namun kurang baik ketika digunakan berulang selama lima hari. Secara umum, elektroda SPCE termodifikasi tinta karbon konduktif dan Nikel nanopartikel ini menjadi alternatif dalam mendeteksi asam oksalat secara elektrokimia dan juga memiliki potensial untuk dikembangkan sebagai bagian dari instrumen deteksi portable.
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The development of Screen-Printed Carbon Electrode (SPCE) modified with conductive carbon ink and nickel nanoparticles for electrochemical detection of oxalic acid has been carried out. Nickel nanoparticle synthesis was performed through the electrolysis method with a potential of 55 V. Conductive carbon ink was combined with nickel nanoparticles to enhance electrode performance. The fabricated electrode’s performance was evaluated using cyclic voltammetry on an oxalic acid solution in the potential range of -0.5 to 1.5 V. Test results showed that the conductive carbon ink and nickel nanoparticles modified SPCE electrode could detect oxalic acid in the solution. The peak oxidation of oxalic acid appeared on the anodic curve at a potential of 1.2 V. Linear curve analysis indicated a correlation between oxalic acid concentration and peak current. Detection limits and sensitivity test resulted in values of 0.45 mM and 4.31×10-2 μA mM-1cm-2, respectively. Variation in scan rate testing also showed that the interaction reaction at the electrode interface was controlled by diffusion process. Repeatability and reproducibility tests demonstrated stable results when the process was repeated up to 15 times, but were less favorable when used repeatedly over several days. In general, this conductive carbon ink and nickel nanoparticles modified SCPE electrode offers an alternative for electrochemical oxalic acid detection and also has the potential for development as part of portable instruments.
| Item Type: | Thesis (Masters) |
|---|---|
| Uncontrolled Keywords: | Nikel Nanopartikel, Oksalat, Sensor elektrokimia, Tinta karbon konduktif, Voltametri Siklik Conductive carbon ink, Cyclic Voltammetry, Electrochemical sensor, Nickel Nanoparticle, Oxalates |
| Subjects: | Q Science > QD Chemistry > QD115 Electrochemical analysis |
| Divisions: | Faculty of Science and Data Analytics (SCIENTICS) > Chemistry > 47101-(S2) Master Thesis |
| Depositing User: | Indra Bayu |
| Date Deposited: | 14 Feb 2024 15:40 |
| Last Modified: | 14 Feb 2024 15:40 |
| URI: | http://repository.its.ac.id/id/eprint/107032 |
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