Sensors: Chemically Modified Electrodes

Morrin, Aoife

doi:10.1016/b978-0-12-409547-2.14546-9

Cited by 5 publications

(4 citation statements)

References 71 publications

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“…The chemically modified electrode (CME) can be given with the desired sensing properties through the artificially customized electrode surface microstructure 12 to realize the design of the electrode function with a strong aN response. Furthermore, the development of nanomaterials provides new opportunities for the research of chemically modified electrodes.…”

Section: Introductionmentioning

confidence: 99%

Gold Nanoparticle-Modified Electrodes for Electrochemical Sensing of Ammonia Nitrogen in Water

Qin,

Zhang,

et al. 2023

ACS Appl. Nano Mater.

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As a common water pollutant, ammonia nitrogen (aN) has adverse effects on human life and production. Therefore, it is of great significance to realize the precision prevention of aN. Here, gold nanoparticle (AuNP)-modified carbon cloth (CC) electrodes were prepared for aN detection using cyclic voltammetry (CV). The first electrode was synthesized by in situ loading of AuNPs on the flexible CC (AuNPs/CC), and the second electrode was obtained by deposition of graphene coating on this basis (AuNPs/CC@G). Their selective response to aN was attributed to the formation and transformation of the gold ammonia complex through the electrodissolution of AuNPs. Two electrodes had a wide quantitative range (0.001−10000 μM); meanwhile, the limits of detection (LoDs) were down to the nanomolar level. From the aN standard to a real water sample, both nanocomposite electrodes also exhibited excellent sensing performance in the aspect of anti-interference, reusability, reproducibility, stability, and recovery. In the simultaneous comparison, the superior results of AuNPs/CC@G have confirmed the realization of optimization, which provided an innovative solution for the efficient and accurate monitoring of aN in water.

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Section: Introductionmentioning

confidence: 99%

Gold Nanoparticle-Modified Electrodes for Electrochemical Sensing of Ammonia Nitrogen in Water

Qin,

Zhang,

et al. 2023

ACS Appl. Nano Mater.

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“…Among the materials used for surface modification, carbon nanotubes stand out for their highly sensitive electrical properties, mechanical strength, chemical stability and volume-surface ratio, where their functionalization helps to improve specificity and interaction with the solution [10,11]. The surface modification can be performed by electrodeposition, whose process is controllable, simple, economical and fast, producing complex nanoscale structures that can be used as active sensor elements for the detection of various materials [12].…”

Section: Introductionmentioning

confidence: 99%

Morphological and Chemical Analysis of the Molecularly-Imprinted Polymer-Based D-Arabinose Sensor on a Modified Electrode with Functionalized Carbon Nanotubes

Sousa

Ferretti

Kneeteman

et al. 2019

The 23rd International Electronic Conference on Synthetic Organic Chemistry

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The sensors modified carbon nanotubes and molecularly imprinted polymers are an excellent choice for the determination of D-arabinose, because they have high selectivity and sensitivity for analysis. This allows the control and optimization of the second generation ethanol production process, given the clear understanding of the chemical changes that occur through the hydrolysis of lignocellulosic biomass. For this reason, the present work presents a chemical study of the functional groups of the chemical species present on the sensor surface by the Fourier transform infrared spectroscopy (FT-IR) technique and a morphological analysis by the scanning electron microscopy (SEM) technique.

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“…8,10,11 The modification of electrodes with CNTs can be carried out by electrodeposition, allowing the formation of active elements with nanoscale structures onto electrode surface, improving electrocatalytic efficiency. 8,12 Nowadays, nanomaterials are being used in sensors based on molecularly imprinted polymers (MIPs), being a promising technology that assigns high-selectivity predetermined to some analytes. 13,14 The modified sensors with molecular specificity are characterized by physical-chemical stability, high selectivity, sensitivity and applicability in chemically aggressive conditions.…”

mentioning

confidence: 99%

Impedimetric Sensor for Pentoses Based on Electrodeposited Carbon Nanotubes and Molecularly Imprinted poly-o-phenylenediamine

Sousa

Sá

Oliveira

et al. 2020

ECS J. Solid State Sci. Technol.

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Impedimetric D-Xylose and D-Arabinose sensors was development from composite electrodes of graphite and histological paraffin, modified with functionalized multi-walled carbon nanotubes (FMWCNTs) based on molecular imprinted poly-ophenylenediamine (poly-o-PD). The contribution of this work was not only the development of a D-xylose and D-Arabinose MIP impedimetric sensor with good performance, but also the electrodeposition method for FMWCNTs onto surface of graphite composites electrodes with ease of control and reproducibility of the electrodeposition process. The sensors were characterized by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), field emission gun scanning electron microscopy (FEG-SEM) and RAMAN spectroscopy. The MIPs sensors for the pentoses have good selectivity, sensitivity in the concentration range of 1.0 × 10 −11 to 1.0 × 10 −10 mol l −1 with limit of detection (LOD) of 4.50 × 10 −12 mol l −1 for D-Xylose and 4.25 × 10 −12 mol l −1 for D-Arabinose. MIPs was applied to determination of pentoses in samples of sugarcane bagasse hydrolysates using the standard addition method and validated by recovery study, which presented satisfactory results between 92.9% and 115.5%.

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Sensors: Chemically Modified Electrodes

Cited by 5 publications

References 71 publications

Gold Nanoparticle-Modified Electrodes for Electrochemical Sensing of Ammonia Nitrogen in Water

Gold Nanoparticle-Modified Electrodes for Electrochemical Sensing of Ammonia Nitrogen in Water

Morphological and Chemical Analysis of the Molecularly-Imprinted Polymer-Based D-Arabinose Sensor on a Modified Electrode with Functionalized Carbon Nanotubes

Impedimetric Sensor for Pentoses Based on Electrodeposited Carbon Nanotubes and Molecularly Imprinted poly-o-phenylenediamine

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