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Nano Gold Hybrid Polyvinyl Alcohol Films for Sensing of Cu 2+ ions
Author(s) -
Sahu Deepak,
Sarkar Niladri,
Mohapatra Priyaranjan,
Swain Sarat K
Publication year - 2019
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201902167
Subject(s) - polyvinyl alcohol , nanocomposite , materials science , colloidal gold , detection limit , scanning electron microscope , nanoparticle , ion , nano , chemical engineering , analytical chemistry (journal) , nanotechnology , nuclear chemistry , chemistry , chromatography , organic chemistry , composite material , engineering
An efficient and eco‐friendly approach is adopted for the synthesis of highly stable L‐alanine assisted nano gold based polyvinyl alcohol nanocomposite hybrid films (Au/PVA).The –COOH groups of L‐alanine and oxygeneous groups of polyvinyl alcohol are utilized for the synthesis of size controlled gold nanoparticles. The as‐synthesized nanocomposites show rapid and selective detection of Cu 2+ ion in aqueous medium. With addition Cu 2+ ion to as‐synthesized nanocomposites, the SPR peaks of Au NPs (538 nm) decrease with occurrence of a red shift as well as a new peak is observed at higher wavelength which is due to the aggregation of gold nanoparticles in the nanocomposites hybrid films. Scanning electron microscope (SEM) micrograph and energy dispersive spectroscopy (EDS) reveal the aggregation of gold nanoparticles in the nanocomposite hybrid films. The limit of detection and limit of quantification for Cu 2+ ion are 40 nM and 133 nM respectively. This technique for detection of Cu 2+ ion in waste water samples is inexpensive and eco‐friendly since no any toxic chemicals are used. In the presence of Cu 2+ ion, the colour of the hybrid film is changed hence, this method also involves visual detection of Cu 2+ ion without use of electrolyte or transducer. Further, many reported methods represent the in situ monitoring of Cu 2+ ion, but the present hybrid film can be used for in situ as well as ex situ monitoring of Cu 2+ ion.