An Ordered Mesoporous Carbon Nanofiber Array for the Sensitive Electrochemical Detection of Malachite Green

Abstract

The recycling of environmental wastes to produce value‐added materials is an attractive prospect for both economic and social development. Herein, we use natural crab shell as the templates to synthesize ordered mesoporous carbon nanofiber arrays (OMCNs) based on a combined hard‐templating and surfactant self‐assembly approach. The Brunauer‐Emmett‐Teller surface area of the OMCNs is calculated to be 1200 m2 g−1, which is accompanied by good conductivity and a mesoporous structure. The as‐prepared OMCNs exhibit a remarkable electrochemical performance for the detection of malachite green (MG). Differential pulse voltammetry (DPV) reveals that the MG sensor has a wide linear range from 0.1 μM to 22.1 μM with a low detection limit of 0.05 μM. The MG sensor also shows a good stability and excellent anti‐interference, which are investigated by cyclic voltammetry. Furthermore, such an electrochemical sensor is successfully applied for the determination of MG in fishery water samples.

Core–Shell ZIF‐8@ZIF‐67‐Derived Cobalt Nanoparticles In Situ Grown on N‐doped Carbon Nanotube Polyhedra for Ultrasensitive Electrochemical Detection of Chloramphenicol

“…As shown in Figure 3b, the chronocoulometry curves of the charge (Q) with respect to time were used to calculate the active surface areas of the modified electrodes according to the Cottrell equation Eq. : [17] …”

Biomass-Derived Carbon-Based Electrodes for Electrochemical Sensing: A Review

“… ( a ) Cyclic voltammograms of 25 μM malachite green in 0.05 M H 2 SO 4 on the ordered mesoporous carbon nanofiber arrays on glassy carbon (red line) and glassy carbon (black line), with the scan rate = 100 mVs −1 and ( b ) Nyquist plots corresponding to the glassy carbon and ordered mesoporous carbon nanofiber arrays on glassy carbon surface in 5 mM Fe(CN) −3 / −4 +0.1 M KCl [ 85 ]. …”

“…The sensor performance achieved a low LOD of 5.96 µM, a wide linear range of 9.9-280.5 µM, and a good sensitivity of 2.1969 µA/µmol dm −3 . Yang et al [85] demonstrated the utilization of a natural crab shell as a template to synthesize ordered mesoporous carbon nanofiber arrays to prepare an electrochemical sensor for the dye malachite green by DPV. Crab shell has been used as a biological template for generating hierarchical structures, allowing the recycling of environmental waste to produce value-added materials.…”

Controllable Construction of Two-Dimensional Conductive M3(HHTP)2 Nanorods for Electrochemical Sensing of Malachite Green in Fish

“…Recently, conductive MOF (CMOF) nanomaterials have become a hot spot in electrochemical area, which is ascribed to high electrical conductivity besides other already known properties of MOFs. , The CMOFs were constructed by linking fully conjugated aromatic ligands with transition-metal centers (e.g., Cu­(II), Ni­(II), and Co­(II)), in which the stacked π-conjugated nanostructures promote charge transfer. It has been found that the same CMOF materials with physical forms have very different properties due to their different microstructures. − Moreover, the electrocatalytic and electrochemical sensing properties of the same series of conductive MOFs with different metal atomic centers also differ . For the linkers, a tricatecholate with a highly conjugated structure, 2,3,6,7,10,11-hexahydroxy­triphenylene (H 12 C 18 O 6 , HHTP), is redox-active and capable of reversible interconversions among catecholate, quinone, and semiquinonate, − making it have a variety of applications in electrocatalysis, , charge storage, ,− and chemical resistance sensing. − The M 3 (HHTP) 2 nanorod materials based on an electrochemically active metal as the metal center are expected to show high electrocatalytic activity for construction of electrochemical sensors.…”