Continuous and Rapid Synthesis of UiO-67 by Electrochemical Methods for the Electrochemical Detection of Hydroquinone

Abstract

Continuous and rapid synthesis of UiO-67 under mild conditions has been achieved by electrochemical methods for the first time. In the reaction system, a zirconium sheet was utilized as electrodes and a metal source for the assembly of UiO-67. High-crystalline UiO-67 with a regular tetrahedral morphology of around 1 μm was obtained within 1.5 h under the optimized solvent composition, voltage, and temperature conditions. This electrochemical synthetic method of UiO-67 in our work overcomes the shortcomings of high temperature and pressure of a traditional solvothermal method, which proposes new ideas for the large-scale and rapid synthesis of UiO-67. The UiO-67 synthesized by an electrochemical method was prepared as a UiO-67−carbon paste electrode (CPE), which exhibited a linear response to hydroquinone (HQ) in the range of 5−300 μM with a detection limit of 3.6 × 10 −9 M (S/N = 3), for the electrochemical detection of HQ. It was confirmed that UiO-67−CPE possessed excellent reusability and antiinterference ability for the detection of HQ, and its detection ability even did not change after standing for 3 months. We further tried to apply UiO-67−CPE to the practical determination of HQ in tap water and river water samples, and the results proved that the recovery rate is 97.9−104.7% in real samples.

Facile Green Approach for Developing Electrochemically Reduced Graphene Oxide-Embedded Platinum Nanoparticles for Ultrasensitive Detection of Nitric Oxide

“…Furthermore, modification of the GCE surface with GO, erGO, Pt NPs, and Pt−GO gradually increased the anodic peak current in the order of 31, 46, 83, and 102.9 μA in accordance with the increased electrochemically active sites on the modified electrode (Figure6c). Also it is worthy of note that a remarkable performance in terms of the electrochemical oxidation current response (184 μA) and current density(23,507.00 μA/cm 2 ) was obtained for SQ-I (Pt−erGO/GCE) in comparison to the individual counterparts in the current response of Pt/GCE, GO/GCE, erGO/GCE, and Pt−GO/ GCE. This enhancement in the current response and current density is because of the synergistic effect of Pt and erGO during the electrocatalytic oxidation of NO.…”

“…These demerits of conventional electrodes hinder the accurate detection of biomolecules at low concentrations with high sensitivity and selectivity. In order to overcome these limitations, conventional electrodes, such as a glassy carbon electrode surface could be modified by introducing various potential nanomaterials. − …”

Synthesis of dual function Fe3O4@MnO2@HKUST-1 magnetic micromotors for efficient colorimetric detection and degradation of hydroquinone

“…Hydroquinone (HQ) has been widely used in the fields of dyes, antibiotic intermediates, cosmetics, photographic developers and antioxidants [1][2][3] because of its strong reducibility. However, HQ is highly toxic and difficult to degrade in ecosystems, 4 so that when too much HQ is discharged into the water environment as an industrial pollutant, it would endanger the health of humans and animals.…”

Bifunctional Sensors Based on Phosphomolybdates for Detection of Inorganic Hexavalent Chromium and Organic Tetracycline

“…Until now, various techniques have been developed for the detection of Cr­(VI) and TC, including capillary electrophoresis, , high-performance liquid chromatography, , fluorescence, , and electrochemical sensors. Among them, electrochemical sensors have aroused far-flung research interest owing to their advantages, such as simplicity, low cost, and quick response. ,− As is known, the performance of electrochemical sensors is highly related to the modified electrode materials, which can facilitate the electrochemical reaction and ample the current signals. However, the structural stability and electrocatalytic activity are two key indicators for an effective electrochemical sensor.…”