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

Abstract

Physiological storage disorders are caused by ineffective post-harvest handling of horticultural crops, particularly fruits. To address these post-harvest concerns, diphenylamine (DPAH •+ ) is widely used as a preservative to prevent fruit degradation and surface scald during storage around the world. Humans are negatively affected by the use of high concentrations of DPAH •+ because of the various health complications related to its exposure. As a result, accurate detection and quantification of DPAH •+ residues in treated fruits are critical. Rare earth metal orthovanadates, which have excellent physical and chemical properties, are potential materials for electrochemical sensors in this area. Herein, we present a simple and direct ultrasonication technique for the surfactant-assisted synthesis of praseodymium orthovanadate (PrVO 4 or PrV) loaded on nickel iron layered double hydroxide (NiFe-LDH) synthesized with deep eutectic solvent assistance, as well as its application as an effective catalyst in the detection and degradation of DPAH •+ in fruits and water samples. The current work presents supreme electrochemical features of a PrV@NiFe-LDH-modified screen-printed carbon electrode (SPCE) where cetyltrimethylammonium bromide (CTAB) surfactant-driven fabrication of PrV directs the formation of highly qualified engineered structures and the deep eutectic solvent based green synthesis of NiFe-LDH creates hierarchical lamellar structures following the principles of green chemistry. PrV and NiFe-LDH combine to produce a synergistic effect that improves the number of active sites, charge transfer kinetics, and electronic conductivity. Differential pulse voltammetry analysis of PrV@NiFe-LDH/SPCE reveals a dynamic working range (0.005−226.26 μM), increased sensitivity (133.13 μA μM −1 cm −2 ), enhanced photocatalytic activity, and low detection limit (0.001 μM), which are considered significant when compared with the former reported electrodes in the literature for the determination of DPAH ̇+ for its real-time applications.

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

“…The XRD pattern associated to the tetragonal crystal structure of PrVO 4 (JCPDS no. 82-1970) , located and indexed to 18.3° (011), 24.1° (020), 30.2° (121), 32.8° (112), 34.2° (220), 36.7° (022), 39.3° (031), 43.7° (013), 46.3° (231), 48.2° (132), 49.6° (040), 50.5° (123), 53.2° (141), 55.9° (240), 56.8° (004), 60.5° (332), 62.6° (233), 64.8° (143), 68.2° (224), 71.4° (152), and 77.6° (404) crystal planes. Furthermore, the lattice parameters were determined ( a = 7.36; b = 7.36; and c = 6.46).…”

Induced abundant oxygen vacancies in Sc2VO5−δ/g-C3N4 heterojunctions for enhanced photocatalytic degradation of levofloxacin

“…Nevertheless, the low visible light utilization and the high charge recombination are still the key factors of low photocatalytic efficiency of rare earth vanadates. 27 Doping, 28 metalsubstitution, 29 morphology control, 19 introduction of surface OVs 30,31 and construction of heterojunction 18,24,25,27 have been adopted to meliorate its photocatalytic quantum efficiency. Among them, surface OVs engineering can effectively regulate the electronic structure and charge migration, produce the active surface phases, and ameliorate the adsorption of the contaminants and intermediates in the photocatalytic degradation process.…”

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

“…Hence, a considerable range of concentrations had to be covered for CT fabrication even at lower levels in the environmental samples. Numerous analytical methods have been established for the determination of CT, which include high-performance liquid chromatography, gas chromatography, flow-injection analysis, chemiluminescence, and electrochemical techniques. − Among these methods, electrochemical techniques are more prominent due to their cost-effectiveness, easy handling, and facile approach for the impulsive monitoring of environmental pollutants. − …”