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

Abstract

Rare-earth metal orthovanadates have great technological relevance in the family of rare-earth compounds owing to their excellent physical and chemical properties. A significant number of studies have been carried out on this class of compounds to exploit their electrochemical properties in virtue of variable oxidation states. But holmium vanadate (HoV) and its morphology selective synthesis have not been considered, which can have potential applications similar to the rest of the family. In this work, we propose the synthesis of superior architectures of HoV with a functionalized boron nitride (f-BN) nanocomposite. The synergistic effect between HoV and f-BN can have a positive effect on the physical characteristics of the nanocomposite, which can be explored for its electrochemical capacity. Here, HoV incorporated with f-BN is explored for the electrochemical detection of Hg2+ ions, which is known for its toxicity-induced environmental health hazards. The structural and compositional revelation reveals higher conductivity and faster electron transfer in the composite, which facilitates a wide working range (0.02–53.8 and 64.73–295.4 μM), low limit of detection (5 nM), higher sensitivity (66.6 μA μM–1 cm–2), good selectivity over 10-fold higher concentration of other interfering compounds compared to Hg2+ ion concentration, and good cycles stability (30 segments) toward Hg2+ ion detection. This also envisages the morphology selective synthesis and utilization of other rare-earth metals, whose electrochemical capacities are unexplored.

Surfactant-Assisted Synthesis of Praseodymium Orthovanadate Nanofiber-Supported NiFe-Layered Double Hydroxide Bifunctional Catalyst: The Electrochemical Detection and Degradation of Diphenylamine

“…REVOs are used as electrode modifiers owing to their high energy density, wide range of oxidation states, and layered structures . According to the dated research, CeVO 4 , , LaVO 4 , LuVO 4 , SmVO 4 , EuVO 4 , , HoVO 4 , and YVO 4 , are recognized as active electrode materials in various electrochemical applications due to their outstanding catalytic activity, structural stability, and optimal band gaps . In general, praseodymium (Pr 3+ ) is one of the potential rare-earth elements, which displays outstanding modes of electronic transitions and has a unique structure due to the presence of intestinal vacant space .…”

Fabrication of Praseodymium Vanadate Nanoparticles on Disposable Strip for Rapid and Real-Time Amperometric Sensing of Arsenic Drug Roxarsone

“…Screen-printed carbon electrodes (SPCEs) are widely used in developing various electrochemical sensors as working electrodes that detect analyte species in the agricultural, ecological, and biomedical industries. , SPCE has a planar shape, and for electrochemical sensing, a few microliters of the sample are applied to the sensor’s surface in the form of a droplet. SPCE was chosen as the substrate electrode because of its multiple advantages, including low volume consumption, disposability, biocompatibility, durability, outstanding reproducibility, cost-effectiveness, design flexibility, and sample selection for onsite pollution detection. − Aforementioned distinguishing characteristics, a SPCE is a potential analyte detection working electrode.…”

Construction of a Copper Bismuthate/Graphene Nanocomposite for Electrochemical Detection of Catechol

“…In CBO, there exist divalent A II Cu ions (Cu + ) of the tetrahedral sites, where the trivalent B III Bi ion (Bi + ) cations occupy one-half (1/2) of the octahedral sites, whereas they are arranged with CuO 4 square planar groups that are associated to a distorted trigonal BiO 6 polyhedral, which is one essential factor of spinel structured compounds. − However, CBO delivers weak charge carrier mobility, and multiple experiments have been conducted to improve it. By controlling the morphology and hybridizing with immensely conductive materials, the electrical and electrochemical performance is improved. − …”