Tracking metal ions with polypyrrole thin films adhesively bonded to diazonium-modified flexible ITO electrodes.
Momath LoAbdou K D DiawDiariatou Gningue-SallJean-Jacques AaronMehmet A OturanMohamed Mehdi ChehimiPublished in: Environmental science and pollution research international (2018)
Adhesively bonded polypyrrole thin films doped with benzene sulfonic acid (BSA) were electrodeposited on aminobenzenediazonium-modified flexible ITO electrodes and further employed for the detection of Pb2+, Cu2+, and Cd2+ metal ions in aqueous medium. The aminophenyl (AP) adhesive layer was grafted to ITO by electroreduction of the in situ generated parent diazonium compound. Polypyrrole (PPy) thin films exhibited remarkable adhesion to aminophenyl (ITO-AP). The strongly adherent polypyrrole films exhibited excellent electroactivity in the doped state with BSA which itself served to chelate the metal ions in aqueous medium. The surface of the resulting, modified flexible electrode was characterized by XPS, SEM, and electrochemical methods. The ITO-AP-PPy electrodes were then used for the simultaneous detection of Cu2+, Cd2+, and Pb2+ by differential pulse voltammetry (DPV). The detection limits were 11.1, 8.95, and 0.99 nM for Cu2+, Cd2+, and Pb2+, respectively. In addition, the modified electrodes displayed a good reproducibility, making them suitable for the determination of heavy metals in real wastewater samples.
Keyphrases
- aqueous solution
- reduced graphene oxide
- heavy metals
- molecularly imprinted
- solid state
- quantum dots
- gold nanoparticles
- carbon nanotubes
- label free
- loop mediated isothermal amplification
- transcription factor
- metal organic framework
- ionic liquid
- real time pcr
- risk assessment
- solid phase extraction
- nk cells
- health risk assessment
- blood pressure
- wastewater treatment
- highly efficient
- water soluble
- staphylococcus aureus
- sewage sludge
- escherichia coli
- high resolution
- tandem mass spectrometry
- biofilm formation
- liquid chromatography