Open AccessSurface Modified Chitosan with Cadmium Sulfide Quantum Dots as Luminescent Probe for Detection of Silver Ions
Author(s) -
Chella Santhosh,
R. S. Ernest Ravindran
Publication year - 2021
Publication title -
asian journal of chemistry/asian journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.145
H-Index - 34
eISSN - 0975-427X
pISSN - 0970-7077
DOI - 10.14233/ajchem.2021.23003
Subject(s) - chitosan , cadmium sulfide , quantum dot , chemistry , transmission electron microscopy , luminescence , aqueous solution , silver sulfide , photoluminescence , quenching (fluorescence) , fluorescence , nuclear chemistry , chemical engineering , nanotechnology , inorganic chemistry , materials science , organic chemistry , optoelectronics , physics , quantum mechanics , engineering
In present work, the surface modified cadmium sulfide quantum dots (CdS QDs) was synthesizedwith chitosan for the detection of silver ions. Chitosan was employed as matrix medium to fabricateCdS QDs, resulting in the formation of novel QDs/chitosan composite. The CdS quantum dots surfacecoated with chitosan were analyzed using UV-vis spectrophotometer, X-ray diffraction and transmissionelectron microscope. The chitosan + CdS QDs exhibited high aqueous solubility with better steadiness.By using chitosan + CdS, the silver ions were not only detected but also reduced to nanosize due to thereducing property of chitosan. The mechanism of fluorescence quenching of chitosan + CdS by Ag+was investigated using photoluminescence spectroscopy.