Diamond electrodes for trace alpha pollutant sequestration via covalent grafting of nitrilotriacetic acid (NTA) ligand

Quang Thuan Tran (1) , Jacques Sanoit (de) (1) , Sylvie Pierre (2) , Jean-Charles Arnault (1) , Philippe Bergonzo (1)

1 LCD-LIST - Laboratoire Capteurs Diamant
2 LNHB - Laboratoire National Henri Becquerel

We describe a very simple and efficient route to functionalize boron-doped-diamond (BDD) electrodes with a chelating nitrilotriacetic acid (NTA) ligand. The BDD electrode surface was first functionalized with a carboxylic acid group via electrochemical grafting of 4-aminophenylcarboxylic acid in aqueous solution and subsequently linked to NTA ligand via a coupling reaction with amine terminated NTA ligand in PBS solution (pH 7.5). Modified BBD surfaces were characterized using X-ray photoelectron spectroscopy (XPS), cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The present study has demonstrated that NTA functionalized BDD surfaces can successfully be used for reversible Am-241 sequestration in aqueous solution

Keywords: Boron-doped-diamond; amine electrografting; nitrilotriacetic acid ligand; alpha-particle spectrometry; GLASSY-CARBON ELECTRODE; AQUEOUS-SOLUTION; ELECTROCHEMICAL OXIDATION; 4-AMINOBENZOIC ACID; MULTILAYER FILMS; DOPED DIAMOND; SURFACE; IMMOBILIZATION; THERMODYNAMICS; STABILITY

Domains: Engineering Sciences [physics]; Micro and nanotechnologies/Microelectronics; Chemical Sciences; Inorganic chemistry; Physics [physics]; Nuclear Experiment [nucl-ex]

Quang Thuan Tran, Jacques Sanoit (de), Sylvie Pierre, Jean-Charles Arnault, Philippe Bergonzo. Diamond electrodes for trace alpha pollutant sequestration via covalent grafting of nitrilotriacetic acid (NTA) ligand. Electrochimica Acta, 2014, 136, pp.430 - 434. ⟨10.1016/j.electacta.2014.05.087⟩. ⟨cea-01863446⟩