Premium
Hydroxyapatite Wrapped Multiwalled Carbon Nanotubes/Ionic Liquid Composite Electrode: A High Performance Sensor for Trace Determination of Lead Ions
Author(s) -
Safavi Afsaneh,
Sorouri Mohsen,
Khanipour Peyman
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.201300325
Subject(s) - detection limit , materials science , electrode , nanocomposite , stripping (fiber) , metal ions in aqueous solution , ionic liquid , composite number , linear range , aqueous solution , selectivity , analytical chemistry (journal) , inorganic chemistry , chemical engineering , metal , nanotechnology , composite material , chemistry , chromatography , catalysis , metallurgy , organic chemistry , engineering
A nanocomposite consisting of multiwalled carbon nanotubes wrapped with hydroxyapatite (HA/MWCNTs) was used in the construction of a new composite paste electrode using an ionic liquid as the binder. The stable surface in aqueous solutions as well as the high sorptive behaviors towards heavy metal ions and the favorable charge transfer make the electrode highly efficient especially for stripping or adsorptive analysis. The analysis of Pb 2+ as a model of heavy metal ions has been performed. Good sensitivity, detection limit, selectivity and reproducibility were obtained for the suggested sensor. The linear range of the electrode response covered four orders of magnitude (1 nM–10 µM), in two linear ranges. The obtained detection limit for Pb 2+ was 2×10 −11 M.