1. Modification of glassy carbon electrode with NiO nanoparticles prepared using Ocimum sanctum leaf extract as urea sensor
- Author
-
Yoki Yulizar, Tribidasari A. Ivandini, and P R Arief
- Subjects
chemistry.chemical_compound ,Materials science ,biology ,chemistry ,Glassy carbon electrode ,Urea ,Nio nanoparticles ,Ocimum ,biology.organism_classification ,Nuclear chemistry - Abstract
NiO nanoparticles (NiO NPs) have been prepared with green synthesis method using Ocimum sanctum leaf extract (OSLE), which contains secondary metabolite compounds of alkaloids as a weak base source and capping agent. Characterization using Particle Size Analyser (PSA) showed a particle size of NiO about 52.42 nm. NiO NPs was used as modified on glassy carbon (GC) electrode, and then characterized using cyclic voltammetry (CV) and Scanning Electron Microscopy-Energy Dispersive X-Ray (SEM-EDX). GC-NiO NPs was used for preliminary studies of urea sensor. The results showed that GC-NiO NPs can detect urea with limit of detection (LOD) values of 0.12 mM and linearity R2 of 0.97. In addition, the repeatability of urea sensor studies with GC-NiO NPs electrode shows % RSD of 2.854, while its stability shows % RSD of 7.90 for 3 days.
- Published
- 2020
- Full Text
- View/download PDF