Graphene nanodots-encaged porous gold electrode fabricated via ion beam sputtering deposition for electrochemical analysis of heavy metal ions
Data(s) |
01/01/2015
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Resumo |
All rights reserved. A graphene nanodots-encaged porous gold electrode via ion beam sputtering deposition (IBSD) for electrochemical sensing is presented. The electrodes were fabricated using Au target, and a composite target of Al and graphene, which were simultaneously sputtered onto glass substrates by Ar ion beam, followed with hydrochloric acid corrosion. The as-prepared graphene nanodots-encaged porous gold electrodes were then used for the analysis of heavy metal ions, e.g. Cu2+ and Pb2+ by Osteryoung square wave voltammetry (OSWV). These porous electrodes exhibited enhanced detection range for the heavy metal ions due to the entrapped graphene nanodots in 3-D porous structure. In addition, it was also found that when the thickness of porous electrode reached 40 nm the detection sensitivity came into saturation. The linear detection range is 0.009-4 μM for Cu2+ and 0.006-2.5 μM for Pb2+. Good reusability and repeatability were also observed. The formation mechanism and 3-D structure of the porous electrode were also investigated using scanning electron microscope (SEM), transmission electron microscope (TEM) and X-ray photoelectron spectra (XPS). This graphene entrapped 3-D porous structure may envision promising applications in sensing devices. |
Identificador | |
Idioma(s) |
eng |
Publicador |
Elsevier |
Relação |
http://dro.deakin.edu.au/eserv/DU:30074234/yang-graphinenanodots-2015.pdf http://www.dx.doi.org/10.1016/j.snb.2014.10.009 |
Direitos |
2015, Elsevier |
Palavras-Chave | #Science & Technology #Physical Sciences #Technology #Chemistry, Analytical #Electrochemistry #Instruments & Instrumentation #Chemistry #Graphene nanodots #Porous gold #OSWV #Heavy metal ion detection #Ion beam sputtering deposition #NANOPOROUS GOLD #THIN-FILMS #SELECTIVE DETECTION #OXIDE #PB2+ #NANOPARTICLES #PERFORMANCE #REDUCTION #LEAD #NANOCOMPOSITES |
Tipo |
Journal Article |