Abstract
This paper reports the results of structural, morphological, and optical analysis of Cu core Ag shell (CucAgs) nanoparticles (NPs) and CucAgs polyvinyl alcohol (PVA) nanocomposite (NC) films. Further their application for colorimetric cyanide (CN‾) sensing has been demonstrated. High resolution transmission electron microscopy (HRTEM) confirmed the growth of CucAgs NPs. Morphological investigations have been performed using field-emission scanning electron microscopy (FE-SEM). CucAgs NPs and CucAgs PVA NC films have been used for colorimetric CN‾ sensing in water. CucAgs NPs show good sensitivity and selectivity for CN‾ ion among other related anions with a limit of detection (LOD) of 0.15 μM. The potential application of CucAgs NPs for the detection of CN‾ in apricot seed extract has also been explored. Further, UV–visible analysis reveals that NC containing 1.6 wt% CucAgs NPs completely blocks the UV region of electromagnetic spectrum.
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