Open AccessModification of gold nanoparticles through allyl mercaptan bridge at boron-doped diamond electrode for an arsen (V) sensor
Author(s) -
O. Magdalena,
N. A. Fauzillah,
Hanzhola Gusman Riyanto,
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/902/1/012013
Subject(s) - detection limit , colloidal gold , diamond , boron , nanoparticle , electrode , materials science , analytical chemistry (journal) , anodic stripping voltammetry , cyclic voltammetry , chemistry , nuclear chemistry , electrochemistry , inorganic chemistry , nanotechnology , chromatography , metallurgy , organic chemistry
A simple, cheap and fast analytical procedure for arsen (V) detection was developed by applying the BDD (boron-doped diamond) modified by gold nanoparticles (AuNPs-BDD). The gold nanoparticles (AuNPs) with an average particle size of 10 nm was synthesized through reduction reaction of gold ions by NaBH4 in the presence of allyl mercaptan. These nanoparticles could be successfully deposited on the surface of boron-doped diamond (BDD) by an immersion process under the exposure of UV light ( λ = 254 nm) for 6 h. An Au/C ratio of around 1:56 was observed at the prepared AuNPs-BDD. Preliminary study for arsen (V) detection by using anodic stripping voltammetry (ASV) technique using this electrode in a solution of 0.1 M HCl containing of NaBH 4 showed a good linearity (R 2 = 0.99) of the current flow in the concentration range of 0–100 µM with a limit detection of 0.105 µM.