Sr@FeNi-S Nanoparticle/Carbon Nanotube Nanocomposite with Superior Electrocatalytic Activity for Electrochemical Detection of Toxic Mercury(II)

Abstract

the selective and sensitive electrochemical determination of trace amounts of mercury (Hg (II) ). The electrochemical behavior of the modified electrode and the mechanism of the Hg (II) were investigated by cyclic voltammetry. By differential pulse voltammetry at optimum parameters such as a wide linear range (WLR: 0.05−279 μM), an ultralow level detection limit (LOD: 0.52 nM) of Hg (II) is observed with a sensitivity of 1.838 μA μM −1 cm −2 . The practical feasibility of the electrode was assessed in lake water and river water samples with satisfactory recovery results of Hg (II) added. Moreover, this work not only demonstrates the tremendous potential of electrochemical detection of Hg (II) but also highlights a simple and robust methodology to develop material discovery and design for improved electrochemical performance.

Metal-Organic Framework MIL-53(Fe): Synthesis, Electrochemical Characterization, and Application in Development of a Novel and Sensitive Electrochemical Sensor for Detection of Cadmium Ions in Aqueous Solutions

“…The important characteristics of the sensor include sensitivity, stability, selectivity, response time, cost, and reusability [9]. To improve the sensitivity of electrochemical sensors, advanced materials have been applied to modified electrodes, including nanostructured conducting polymers [12,15], metal and metal oxide nanoparticles [16][17][18], nanostructured carbon materials (such as porous carbon, carbon nanotube, and graphene/graphene oxide) [17][18][19], and metal-organic frameworks (MOFs) [6,9,[20][21][22][23][24]. Among them, MOF materials which are constructed by metal ions or clusters and organic ligands via coordination bonds have unique properties including their structural diversity, flexible framework functionality, large metal cluster density, high stability, abundant adsorption sites, and a large surface area exceeding that of activated carbons and zeolites which are traditional porous materials [9,21,[23][24][25][26].…”

Biothiol-Functionalized Cuprous Oxide Sensor for Dual-Mode Sensitive Hg2+ Detection

“…Compared with previously reported electrochemical detection methods for Hg 2+ , this sensor exhibits satisfactory sensitivity and a wide detection range (Table ). ,− …”

Toward the Development of Disposable Electrodes Based on Holmium Orthovanadate/f-Boron Nitride: Impacts and Electrochemical Performances of Emerging Inorganic Contaminants

“…Divalent mercury ion (Hg 2+ ion) is a prevalent pollutant that causes enormous problems worldwide regarding its toxicity, persistence, and bioaccumulation. Categorization of this contaminant among those in the list of priority substances in the European Union Water Framework Directive highlights its implications on various compartments of the environment. − In addition, oceanic mercury pollution is of global concern due to the transformation of Hg 2+ ion into highly toxic methyl mercury via microbial methylation, which can have far-reaching consequences even at low levels of exposure . Furthermore, tuna fish is a widely consumed fish species around the world because it is high in protein, omega-3 fatty acids, and B vitamins.…”

“…36−38 In addition, oceanic mercury pollution is of global concern due to the transformation of Hg 2+ ion into highly toxic methyl mercury via microbial methylation, which can have farreaching consequences even at low levels of exposure. 39 Furthermore, tuna fish is a widely consumed fish species around the world because it is high in protein, omega-3 fatty acids, and B vitamins. However, canned tuna is naturally most enriched with mercury.…”