Electrochemical Vanillin Determination on Gold Nanoparticles Modified Multiwalled Carbon Nanotube Electrode
Makaleler > Tam Makale · 2018
Yazarlar: Çağrı Ceylan Koçak, Şükriye KARABİBEROĞLU
Deu Muhendislik Fakultesi Fen ve Muhendislik, Uluslararası, 2018, cilt 20, ss 461-470
DOI: 10.21205/deufmd.2018205936
Özet
In this study, modified electrodes were prepared for Vanilline (VAN) determination.Multiwalled carbon nanotubes (MWCNT) were functionalized with acid treatment and then gold nanoparticles were electrodeposited on the MWCNTs by applying several repetitive scans in order to form gold nanoparticles modified multiwalled carbon nanotube glassy carbon electrode (Au-MWCNT/GCE) surface.The morphology and structure of electrode surfaces were characterized by scanning electron microscopy (SEM).The resulting Au-MWCNT/GC electrode showed efficient behavior to VAN electro-oxidation.The calibration graph consisted of two linear segments of 7.0x10 -8 -6.5x10 -6 mol L -1 and 7.0x10 -6 -7.5x10 -5 mol L -1 with a detection limit of 3.8x10 -8 mol L -1 that obtained from differential pulse studies.The practical applicability of the proposed modified electrode was tested for the determination of VAN in commercial ice cream and milk powder.The satisfactory results show that the Au-MWCNT/GCE has promising potential in sensor applications.