Abstract
Gold nanoparticles were synthesized using Ananas comosus as reducing agent. UV-visible spectra show the surface plasmon resonance peak at 544 nm. TEM measurement shows that the formation of monodispersed spherical nanoparticles with average size of 7 nm. Crystalline nature of the nanoparticles was evident from TEM images and peaks in the XRD pattern. FTIR analysis provides the presence of biomolecules responsible for the reduction and capping of the prepared gold nanoparticles. A selective and sensitive method is proposed for detecting mercury based on the SPR change of gold nanoparticles. This mercury sensor based on surface plasmon optical sensor can be used in water analysis.
Highlights
The determination of heavy metal ions in water is of great importance because of their role in the physiological functions of biological systems.[1]
The prepared nanoparticles were characterized by UV-visible, Fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM) and energy dispersive spectroscopy (EDS) technique to identify the size, shape of nanoparticles and biomolecules act as reducing agents
Fourier Transform Infrared Radiation (FTIR) measurements show that carboxylic acid groups present in Ananas comosus fruit extract was used as reducing agent
Summary
The determination of heavy metal ions in water is of great importance because of their role in the physiological functions of biological systems.[1]. A variety of methods have been developed for quantification of Hg2+ concentrations such as atomic absorption spectroscopy, inductive coupled plasma mass spectroscopy, electrochemical impedance spectroscopy, voltammetry and polarography. These methods are expensive, complicated sample treatment and mostly take a long measuring period. The selective optical sensor is an alternative method and has been attracted due to the excellent sensitivity, rapid response, the ability to do the detection in a non-destructive manner and cost-effective
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