Open AccessModification of glassy carbon electrode with NiO nanoparticles prepared using Ocimum sanctum leaf extract as urea sensor
Author(s) -
P R Arief,
Yoki Yulizar,
Tribidasari A. Ivandini
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/763/1/012039
Subject(s) - non blocking i/o , cyclic voltammetry , urea , detection limit , electrode , scanning electron microscope , nuclear chemistry , materials science , particle size , glassy carbon , electrochemical gas sensor , analytical chemistry (journal) , chemistry , electrochemistry , chromatography , organic chemistry , composite material , catalysis
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 R 2 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.