Reduced graphene oxide/copper nanoparticle composites as electrochemical sensor materials for nitrate detection
Document Type
Article
Publication Date
11-26-2021
Abstract
An efficient electrochemical nitrate (NO3-) sensor consisting of a copper nanoparticle-reduced graphene oxide composite (Cu-rGO) with different rGO loadings was fabricated on indium tin oxide glass (ITO) by simple one-pot electrochemical deposition. The one-pot electrochemical deposition allows for the formation of Cu nanoparticles, reduction of graphene oxide, and decoration of Cu nanoparticles onto the rGO surface simultaneously. The as-electrochemically deposited Cu-rGO-modified ITO electrode was characterized using X-ray diffraction, transmission electron microscopy, and X-ray photoelectron spectroscopy. The effect of rGO on the electrocatalytic activity of the Cu-rGO-modified ITO electrode toward NO3- reduction was investigated. The Cu-rGO composite with 0.5 mg mL(-1) rGO loading shows better sensitivity, a lower detection limit, and a wide linear detection range. Finally, the Cu-rGO-modified ITO electrode with 0.5 mg mL(-1) rGO loading was used to measure nitrate in real samples.
Keywords
Copper nanoparticles, Reduced graphene oxide, Electrodeposition, Nitrate sensor, Acidic medium
Divisions
Science
Funders
AUA-UAE Joint Research Grant Project[IF016-2021],AUA-UAE Joint Research Grant Project[G00003485],Indonesian Ministry of Research and Technology/National Research and Innovation Agency through Hibah Penelitian Dasar Unggulan Perguruan Tinggi (PDUPT) 2021[NKB-177/UN2.RST/HKP.05.00/2021]
Publication Title
ACS Applied Nano Materials
Volume
4
Issue
11
Publisher
Amer Chemical Soc