TY - JOUR
T1 - Nanostructured nitrogen doped diamond for the detection of toxic metal ions
AU - Deshmukh, Sujit
AU - Sankaran, Kamatchi Jothiramalingam
AU - Karneychuk, Svetlana
AU - Verbeeck, Johan
AU - McLaughlin, James
AU - Haenen, Ken
AU - Roy, Susanta S
PY - 2018/9/1
Y1 - 2018/9/1
N2 - This work demonstrates the applicability of one-dimensional nitrogen-doped diamond nanorods (N-DNRs) for the simultaneous electrochemical (EC) detection of Pb2+ and Cd2+ ions in an electrolyte solution. Well separated voltammetric peaks are observed for Pb2+ and Cd2+ ions using N-DNRs as a working electrode in square wave anodic stripping voltammetry measurements. Moreover, the cyclic voltammetry response of N-DNR electrodes towards the Fe(CN)6/4-/Fe(CN)6/3- redox reaction is better as compared to undoped DNR electrodes. This enhancement of EC performance in N-DNR electrodes is accounted by the increased amount of sp2 bonded nanographitic phases, enhancing the electrical conductivity at the grain boundary (GB) regions. These findings are supported by transmission electron microscopy and electron energy loss spectroscopy studies. Consequently, the GB defect induced N-DNRs exhibit better adsorption of metal ions, which makes such samples promising candidates for next generation EC sensing devices
AB - This work demonstrates the applicability of one-dimensional nitrogen-doped diamond nanorods (N-DNRs) for the simultaneous electrochemical (EC) detection of Pb2+ and Cd2+ ions in an electrolyte solution. Well separated voltammetric peaks are observed for Pb2+ and Cd2+ ions using N-DNRs as a working electrode in square wave anodic stripping voltammetry measurements. Moreover, the cyclic voltammetry response of N-DNR electrodes towards the Fe(CN)6/4-/Fe(CN)6/3- redox reaction is better as compared to undoped DNR electrodes. This enhancement of EC performance in N-DNR electrodes is accounted by the increased amount of sp2 bonded nanographitic phases, enhancing the electrical conductivity at the grain boundary (GB) regions. These findings are supported by transmission electron microscopy and electron energy loss spectroscopy studies. Consequently, the GB defect induced N-DNRs exhibit better adsorption of metal ions, which makes such samples promising candidates for next generation EC sensing devices
KW - Nitrogen-doped diamond nanorod
KW - Cyclic voltammetry
KW - Square wave anodic stripping voltammetry
KW - Nanographitic phase
KW - Electron energy loss spectroscopy
UR - https://pure.ulster.ac.uk/en/publications/nanostructured-nitrogen-doped-diamond-for-the-detection-of-toxic-
U2 - 10.1016/j.electacta.2018.07.067
DO - 10.1016/j.electacta.2018.07.067
M3 - Article
VL - 283
SP - 1871
EP - 1878
JO - Electrochimica Acta
JF - Electrochimica Acta
SN - 0013-4686
ER -