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Nanocomposites Based on Polystyrene Sulfonate as Sensing Platforms. Comprehensive Electrochemical Study of Carbon Nanopowders and Carbon‐Nanofibers Composite Membranes
Author(s) -
Cantalapiedra Alberto,
Gismera Ma Jesús,
Procopio Jesús R.,
Sevilla Ma Teresa
Publication year - 2015
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.201400342
Subject(s) - materials science , nanocomposite , carbon nanofiber , membrane , polystyrene sulfonate , electrochemistry , polystyrene , composite number , chemical engineering , cyclic voltammetry , nanofiber , scanning electron microscope , electrode , carbon fibers , composite material , carbon nanotube , polymer , chemistry , biochemistry , pedot:pss , engineering
Nanocomposite membranes, prepared from carbon nano‐powders (CnP) or carbon nano‐fibers (CnF) dispersions in polystyrene sulfonate (PSS), were evaluated as sensing platforms. Composite surfaces were analyzed by scanning electron microscopy and field‐emission electron microscopy. Electrical and electrochemical properties of composite membranes were evaluated. Percolation threshold was reached at percentages higher than 5 % CnP or 0.5 % CnF. Best electrochemical responses were obtained on electrodes modified with composites containing 10 % CnP and 1 % CnF. Using a PSS‐10 % CnP composite modified electrode, a limit of detection of 0.3 µg L −1 (1 nM) was obtained in lead determination by differential pulse anodic stripping voltammetry.