Tailoring properties of reduced graphene oxide by oxygen plasma treatment

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Kondratowicz I., Nadolska M., ŞAHİN S., Łapiński M., Prześniak-Welenc M., Sawczak M., ...Daha Fazla

Applied Surface Science, cilt.440, ss.651-659, 2018 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 440
  • Basım Tarihi: 2018
  • Doi Numarası: 10.1016/j.apsusc.2018.01.168
  • Dergi Adı: Applied Surface Science
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.651-659
  • Anahtar Kelimeler: Bilirubin oxidase adsorption, Enzyme electrode, Oxygen plasma treatment, Reduced graphene oxide, Surface engineering, Wettability
  • Bilecik Şeyh Edebali Üniversitesi Adresli: Evet

Özet

© 2018We report an easily controllable, eco-friendly method for tailoring the properties of reduced graphene oxide (rGO) by means of oxygen plasma. The effect of oxygen plasma treatment time (1, 5 and 10 min) on the surface properties of rGO was evaluated. Physicochemical characterization using microscopic, spectroscopic and thermal techniques was performed. The results revealed that different oxygen-containing groups (e.g. carboxyl, hydroxyl) were introduced on the rGO surface enhancing its wettability. Furthermore, upon longer treatment time, other functionalities were created (e.g. quinones, lactones). Moreover, external surface of rGO was partially etched resulting in an increase of the material surface area and porosity. Finally, the oxygen plasma-treated rGO electrodes with bilirubin oxidase were tested for oxygen reduction reaction. The study showed that rGO treated for 10 min exhibited twofold higher current density than untreated rGO. The oxygen plasma treatment may improve the enzyme adsorption on rGO electrodes by introduction of oxygen moieties and increasing the porosity.