Farklı Metalik Parçacıklarla Modifiye Edilmiş Polikaprolakton Filmlerin Difüzyon Katsayısına Etkisi

Yıl 2024, Cilt: 14 Sayı: 4, 1665 - 1678, 15.12.2024

Muhammet Samet Kılıç

https://doi.org/10.31466/kfbd.1415301

Öz

Modifiye elektrotların arzu edilen özelliklere göre tasarlanması (biyo)elektro-katalitik ve (biyo)sensör gibi farklı çalışma alanları için büyük bir çeşitlilik sağlamaktadır. Kullanılacak modifiye filmlerin elektrot yüzeylerindeki elektrokimyasal davranışı çalışmaların analitik parametrelerine etki etmektedir. Bu çalışmada, modifiye elektrotların (polikaprolakton/iridyum(IV) oksit (PCL/(IrO2), polikaprolakton/kobalt(II) oksit (PCL/CoO), polikaprolakton/alüminyum oksit (PCL/Al2O3) ve polikaprolakton/ferrosen (PCL/Fe (C5H5)2)) yüzeylerinde potasyum hekzasiyanoferratın [K3Fe(CN)6] redoks reaksiyonu döngüsel voltametri tekniği ile gerçekleştirilmiştir. Elde edilen voltamogram dataları ve Randles-Sevcik denklemi yardımıyla her bir kompozit için oksidasyon ve redüksiyon difüzyon katsayıları hesaplanmıştır. Kompozit filmlerin difüzyon katsayısı değerleri birbirleriyle kıyaslanmış ve [K3Fe(CN)6]’dan sağlanan demir iyonlarının IrO2 ile modifiye edilmiş elektrodun yüzeyinde, hazırlanan diğer modifiye elektrotlara göre daha iyi oksidasyon ve redüksiyon performansı gösterdiği tespit edilmiştir.

Anahtar Kelimeler

Difüzyon katsayısı, Randles-Sevcik denklemi, iridyum oksit, kobalt oksit, alüminyum oksit, ferrosen

Effect of Polycaprolactone Films Modified with Different Metallic Particles on Diffusion Coefficient

Öz

Designing modified electrodes according to the desired properties provides a great diversity for different fields of study such as (bio)electro-catalytic and (bio)sensor. The electrochemical behavior of the modified films to be used on the electrode surfaces affects the analytical parameters of the studies. In this study, the redox reaction of potassium hexacyanoferrate [K3Fe(CN)6] on the surfaces of modified electrodes (polycaprolactone/iridium(IV) oxide (PCL/(IrO2), polycaprolactone/cobalt(II) oxide (PCL/CoO), polycaprolactone/aluminum oxide (PCL/Al2O3) and polycaprolactone/ferrocene (PCL/Fe (C5H5)2)) was carried out by cyclic voltammetry technique. Oxidation and reduction diffusion coefficients were calculated for each composite using the voltammogram data and Randles-Sevcik equation. The diffusion coefficient values of the composite films were compared with each other and it was found that the iron ions provided from [K3Fe(CN)6] showed better oxidation and reduction performance on the surface of the IrO2 modified electrode than the other prepared modified electrodes.

Anahtar Kelimeler

Diffusion coefficient, Randles-Sevcik equation, iridium oxide, cobalt oxide, aluminum oxide, ferrocene

Kaynakça

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