Reduced graphene oxide/copper nanoparticle composites as electrochemical sensor materials for nitrate detection

Sookhakian, Mehran and Teridi, Mohd Asri Mat and Tong, Goh Boon and Woi, Pei Meng and Khalil, Munawar and Alias, Yatimah (2021) Reduced graphene oxide/copper nanoparticle composites as electrochemical sensor materials for nitrate detection. ACS Applied Nano Materials, 4 (11). pp. 12737-12744. ISSN 2574-0970, DOI

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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.

Item Type: Article
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]
Uncontrolled Keywords: Copper nanoparticles;Reduced graphene oxide;Electrodeposition;Nitrate sensor;Acidic medium
Subjects: Q Science > QC Physics
Q Science > QD Chemistry
Divisions: Faculty of Science
Depositing User: Ms Zaharah Ramly
Date Deposited: 17 Oct 2022 02:12
Last Modified: 17 Oct 2022 02:12

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