• Roduan, Mohamad Rafizie Aiman Mohamed
• Yazid, Siti Nur Akmar Mohd
• Ahmad, Mohamad Syahrizal
• Isa, Illyas Md
• Bahari, Aireen Aina
• Ul-Hamid, Anwar
• Sidik, Siti Munirah
• Saidin, Mohamad Idris
• Hashim, Norhayati

Abstract

<jats:p>In this research, bimetallic nickel-zirconia supported on mesoporous nanoparticles (Ni-Zr/MSN) were successfully synthesized by a simple in situ electrolysis method. Ni-Zr/MSN were well-characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Brunauer-Emmett-Teller (BET) analyzer, field emission scanning electron microscopy (FESEM), and transmission electron microscopy (TEM). Ni-Zr/MSN were then cast onto a modified glassy carbon electrode (Ni-Zr/MSN/GCE) as dopamine (DA) sensor. Under optimal conditions, the sensor showed a linear concen­tration relationship in the range of 0.3 µM–0.1 mM with a limit of detection of 0.13 µM. The relative standard deviation for 0.1 mM DA solution was 2.1 % (n = 5). The presence of excess catechol, saccharose, glycine, lactose, uric acid, and Cr3+, Fe2+ and Na+ as interferents was negligible, except for uric acid in 10-fold excess. The analytical recovery of the sensor was successfully demonstrated by the determination of DA in DA-containing medicine and wastewater samples. The results presented herein provide new perspectives on Ni-Zr/MSN as a potential nanomaterial in the development of DA sensors.</jats:p>

Topics

• nanoparticle
• Carbon
• nickel
• scanning electron microscopy
• x-ray diffraction
• x-ray photoelectron spectroscopy
• transmission electron microscopy
• Fourier transform infrared spectroscopy