Grafen Temelli İletken Polimer-Nanokompozit Elektrodunun Sentezi, Elektrokimyasal ve Optik Özelliklerinin İncelenmesi

Üstün fizikokimyasal özelliklere sahip grafen türevi nanomateryaller son yıllarda farklı araştırma alanlarında kullanılmaktadır. Bu çalışmada grafen temelli nanomateryal olan indirgenmiş grafen oksit (rGO) şeffaf iletken cam yüzeyine modifiye edilmiştir. Bu kaliteli, modifiye elektrot üzerinde sentezi başarıyla tamamlanmış ve karakterize edilmiş olan tiyenil pirol türevi elektroaktif monomer dönüşümlü voltametri yardımıyla polimerleştirilerek PSN/rGO-ITO adı verilen nanokompozit elektrot sentezlenmiştir. Burada rGO, PSN polimer yapısıyla mükemmel etkileşim gösterip, elektron transferini kolaylaştırarak kompozit filmin elektrokimyasal ve optik özelliklerini geliştirmiştir. Örneğin, PSN/rGO-ITO kompoziti yalnızca PSN polimerinin kullanıldığı yüzeye göre elektrokimyasal kararlılığı döngü sayısı bakımından 5 kat artırmıştır. Yine band boşluğu enerjisi (Eg) değerini 2.01 eV’dan 1.91eV' a düşürerek iletkenliği artırmıştır. Bu kompozit film, iletken polimerlerin kullanılabileceği tüm alanlarda özellik geliştiren materyal olarak kullanılabilecek alternatif bir ürünü oluşturmaktadır.

Anahtar Kelimeler:

Elektrokimya, İletken Polimer, Nanokompozit, Spektroelektrokimya

Synthesis of Graphene Based Conducting-Polymer Nanocomposite Electrode and Investigation of Electrochemical and Optical Properties

Graphene derivative nanomaterials with superior physicochemical properties have been used in different research areas in recent years. In this work, graphene-based reduced graphene oxide (rGO) is modified to the transparent conductive glass surface. On this quality modified electrode, the nanocomposite electrode is synthesized by polymerizing (using cycling voltammetry) the thienyl pyrrole derivate electroactive monomer which has been successfully synthesized and characterized (called by PSN/rGO-ITO ). Here, the graphene based nanomaterial has excellent interaction with the polymer structure and has improved electrochemical and optical properties of composite film by facilitating electron transfer. For example, the PSN/rGO-ITO composite film has increased the electrochemical stability by 5 times in terms of the number of cycles when compared to bare PSN surface. Besides, reducing the band gap energy (Eg) value from 2.01 eV to 1.91 eV increased the conductivity. This composite film forms an alternative product that can be used as a material for improving properties in all areas where conductive polymers can be used.

Keywords:

Electrochemistry, Conducting Polymer, Nanocomposite, Spectroelectrochemistry,

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