Premium
Electroanalytical Performance of a Freestanding Three‐Dimensional Graphene Foam Electrode
Author(s) -
FigueiredoFilho Luiz C. S.,
Brownson Dale A. C.,
FatibelloFilho Orlando,
Banks Craig E.
Publication year - 2014
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201300363
Subject(s) - graphene , materials science , aqueous solution , graphene foam , cyclic voltammetry , electrode , detection limit , electrochemistry , electroanalytical method , nanotechnology , analyte , voltammetry , carbon fibers , chemical engineering , chromatography , chemistry , composite number , composite material , organic chemistry , graphene oxide paper , engineering , potentiometric titration
The electroanalytical performance of a freestanding three‐dimensional (3D) quasi‐graphene macrostructure is evaluated and benchmarked towards model analytes in aqueous solutions. Due to the freestanding 3D graphene foam exhibiting near‐super‐hydrophobicity and consequently giving rise to poor voltammetric signatures in aqueous solutions (Brownson et al., J. Mater. Chem. A , 2013 , 1 , 5962), we explore a ‘washing’ pretreatment procedure to reduce the hydrophobic behaviour of the 3D graphene macrostructure in order to try and allow its effective application in such cases. Herein, the electrochemical properties and resultant electroanalytical performance of the pretreated 3D graphene foam (3D‐GF) is critically explored and compared to a freestanding 3D reticulated vitreous carbon (3D‐RVC) foam alternative towards the sensing of a range of important analytes via cyclic voltammetry in aqueous solutions; namely, uric acid (UA), acetaminophen (AP) and dopamine hydrochloride (DA). It is found that the 3D‐RVC exhibits improved electroanalytical characteristics with larger linear ranges and lower limit of detections achievable over that of the 3D‐GF towards the target analytes. This work provides a vital insight into electroanalysis using 3D graphene and carbon foams.