P-nitrofenol’ün elektrokimyasal yöntemle belirlenmesi için esnek ve müstakil PtCu ile modifiye edilmiş grafen esaslı kağıt

Bu çalışmada; esnek, müstakil ve dayanıklı PtCu/indirgenmiş grafen oksit (iGrO) hibrit kağıt sentezlenmiş ve p-nitrofenolün (PNP) elektrokimyasal olarak tespiti için kullanılmıştır. PtCu/iGrO hibrit kağıt, PtCu alaşım nanokompozit yapısının iGrO kağıt elektrot üzerine elektrokimyasal olarak kaplanmasıyla üretilmiştir. Elde edilen PtCu/iGrO hibrit kağıt, taramalı elektron mikroskobu, X-ışını kırınım spektroskopisi, X-ışını fotoelektron spektroskopisi, Raman spektroskopisi, elektrokimyasal empedans spektroskopisi ile karakterize edildi. PtCu/iGrO hibrit kağıdının morfolojik analizi, iGrO elektrot yüzeyinde oluşan çiçek benzeri nanoyapıların çok sayıda keskin kenarlı PtCu nanotabakalarından oluştuğunu göstermiştir. PNP’nin elektrokimyasal belirlenmesinde kullanılan, PtCu/iGrO hibrit kağıt elektrotun, iGrO kağıda kıyasla yüksek elektrokatalitik performans, geniş doğrusal aralık (0.08-760 µM) ve düşük algılama limiti (0.022 µM) sergilediği belirlenmiştir. PtCu/iGrO hibrit kağıt sensör ayrıca musluk suyunda PNP tespiti için yüksek geri kazanım değerleri göstermiştir. Pratik ve uygulanması kolay bir yöntem ile hazırlanan hibrit kağıt sensörü mekanik olarak esnek ve dayanık özellik sergilemiştir. Ayrıca, PtCu/iGrO kağıdın stabilite testleri, bu hibrit elektrotun yüksek performanslı esnek sensör uygulamaları için önemli bir aday olduğunu göstermiştir.

Anahtar Kelimeler:

Elektrokimyasal sensör, Esnek materyal, Grafen esaslı kağıt, P-nitrofenol, PtCu alaşım nanokompozit

A flexible and self-standing PtCu modified graphene-based paperfor detection of p-nitrophenol with electrochemical method

In this study; a flexible, self-contained and durable PtCu/reduced graphene oxide (iGrO) hybrid paper was synthesized and used for the electrochemical detection of p-nitrophenol (PNP). PtCu/iGrO hybrid paper was fabricated through electrodeposition of PtCu composite structure on iGrO paper electrode. The obtained PtCu/iGrO hybrid paper was characterized by field emission scanning electron microscopy (FESEM), X-ray diffraction spectroscopy (XRD), X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, electrochemical impedance spectroscopy. The morphological analysis of PtCu/iGrO hybrid paper showed that flower-like nanostructures formed on the iGrO electrode surface consist of numerous sharp-edged nano layer of PtCu. PtCu/iGrO hybrid paper electrode demonstrated high electrocatalytic performance compared to iGrO paper and exhibited a wide linear range (0.08-760 µM) and a low detection limit (0.022 µM) for the determination of PNP. The PtCu/iGrO hybrid paper sensor also showed high recovery values for PNP detection in tap water. The hybrid paper sensor prepared with a practical and easy-to-apply method exhibited mechanically flexible and durable properties. Moreover, stability tests of PtCu/iGrO paper displayed that this hybrid electrode is an important candidate for high-performance flexible sensor applications.

Keywords:

Electrochemical sensor, Flexible material, Graphene-based paper, P-nitrophenol, PtCu alloy nanocomposite,

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