Journal Article

Electrochemical sensor for detection of mercury (II) ions in water using nanostructured bismuth hexagons

Singh, Rini, Ray, Kanad, Anoop, M. D., Srivastava, Divesh N., Gupta, Sandeep, Awasthi, Kamlendra, Kothari, S. L., Kulshrestha, Vaibhav, Kumar, Manoj

2018

Overview

This study presents a systematic observation of the ability of bismuth nanostructures to detect trace amounts of mercury. Nanostructured hexagons of bismuth were synthesized using electrochemical deposition with potentiostatic mode on indium tin oxide-coated glass electrodes. Regular hexagons composed of nano-sized hexagonal building blocks (edge length ≈ 80 to 700 nm) with well-defined edges were observed in scanning electron microscopy studies. X-ray diffraction pattern indicates the presence of polycrystalline bismuth and bismuth oxide in rhombohedral and cubic phases, respectively. X-ray photoelectron spectroscopy was done to analyze the chemical structure of the prepared nanostructures. Square wave anodic stripping voltammetry technique confirms that these nanostructured electrodes are highly sensitive to H g 2 + ions down to concentrations as low as 0.74 ppb.

• Publisher: Springer Berlin Heidelberg,Springer Nature B.V
• Subject: Acids / Anodic stripping / Applied physics / Bismuth oxides / Carbon / Characterization and Evaluation of Materials / Chemical sensors / Coated electrodes / Condensed Matter Physics / Diffraction patterns / Electrodes / Electrolytes / Glass electrodes / Gold / Hexagons / Indium tin oxides / Machines / Manufacturing / Materials science / Mercury (metal) / Metal oxides / Morphology / Nanostructure / Nanotechnology / Nitrates / Optical and Electronic Materials / Organic chemistry / Oxidation / Photoelectrons / Physics / Physics and Astronomy / Processes / Scanning electron microscopy / Spectrum analysis / Square waves / Surfaces and Interfaces / Thin Films / Voltammetry / X ray photoelectron spectroscopy / X-ray diffraction