Enzyme biosensor based on an N-doped activated carbon fiber electrode prepared by a thermal solid-state reaction

Kim, Jihyun; Cho, Seho; Bae, Tae‐Sung; Lee, Young-Seak

doi:10.1016/j.snb.2014.02.054

Cited by 41 publications

(20 citation statements)

References 38 publications

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“…The presence of O likely stems from the fact that the NMPs were easily oxidized partially by oxygen when exposed to air. Two C (1s) peaks were identified at 284.5 and 287.6 eV, allotted to C-C/C-H and COO bonds, respectively [22][23]. However, after the reaction, these peaks were shifted to 283.4 and 286.99 eV, respectively.…”

Section: Characterization Of the Nmpsmentioning

confidence: 98%

Rapid Fenton-like degradation of methyl orange by ultrasonically dispersed nano-metallic particles

Singh

Chang

Koduru

et al. 2017

Environmental Engineering Research

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This study investigates methyl orange (MO) degradation by an ultrasonically dispersed nano-metallic particle (NMP) assisted advanced Fenton process. The NMPs were synthesized from the leachate of automobile-shredder residue. X-ray photoelectron spectroscopy and Fourier-transform infrared spectroscopy were performed for the prepared NMPs. Various parameters, such as the effects of the NMP dosage, the pH value of the solution, the initial concentration of MO, and the amount of H2O2 on the degradation efficiency of MO were studied. The MO degradation efficiency could be increased by approximately 100% by increasing the dosages of the NMPs and H2O2 to certain limits, after which in both cases the degradation efficiency was reduced when an excess amount was added. The MO degradation efficiency was found to be 100% at pH 2.0 and 2.5 with the 10 mg/L of initial concentration of the MO. The degradation of MO by ultrasonically dispersed NMPs was appropriate with the pseudo-first-order kinetics.

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Section: Characterization Of the Nmpsmentioning

confidence: 98%

Rapid Fenton-like degradation of methyl orange by ultrasonically dispersed nano-metallic particles

Singh

Chang

Koduru

et al. 2017

Environmental Engineering Research

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“…For the DPV measurements, the potential was scanned from 0.3 to 0.9 V vs. reference electrode (RE) at a scan rate of 50 mV s À 1 with pulse amplitude of 40 mV and a pulse width of 0.2 s. Amperometry experiments were carried out at a constant applied potential of 400 mV vs. RE. In this applied potential, the current of phenol oxidation started to decrease and then leveled off to a constant value, due to the enzymatic reaction [34]. This steady state current (I ss ) was recorded as a function of phenol concentration.…”

Section: Electrochemical Measurementsmentioning

confidence: 99%

Rapid Determination of Phenolic Compounds in Water Samples: Development of a Paper‐based Nanobiosensor Modified with Functionalized Silica Nanoparticles and Potato Tissue

et al. 2019

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In this study, we present a fast, simple, low‐cost and disposable method for determination of phenolic content in water samples, using a paper based polyphenol oxidase biosensor. The propylamine functionalized silica nanoparticles was dropped onto a paper sheet. After drying at room temperature, the potato tissue extract including polyphenol oxidase was immobilized on the paper via physical and chemical adsorption. The modified paper was placed on the top of the graphite screen printed electrode. To construct of an electrochemical nanobiosensor, the electrochemical behavior of the modified electrode in different steps was investigated by cyclic voltammetry and electrochemical impedance spectroscopy methods. After being optimized the effective parameters, the changes in the biosensor electrochemical response vs. to the different concentrations of the substrate (phenol solution) were monitored by differential pulse voltammetry and amperometry methods. The linear relationships for phenol detection were obtained in the concentration ranges of 0.01–160 μM and 0.1–300 μM with a detection limit of 0.007 μM and 0.042 μM with DPV and amperometry methods, respectively. This method was successfully used in the voltammetric determination of the phenol content in the real samples, like the river water and the wastewater of wood factory.

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“…These carbon nanomaterials usually show hydrophobic behavior, but the biosensor needs to operate in a hydrophilic environment. The poor interfacial affinity between hydrophobic carbon nanomaterials and the hydrophilic biomaterials results in low sensitivity due to the decreased electron transfer . Some nanostructured metal oxides have been used to fabricate sensitive enzyme electrodes by immobilizing enzyme molecules with low isoelectric point on metal oxides with high isoelectric point through the electrostatic binding interaction.…”

Section: Introductionmentioning

confidence: 99%

“…The poor interfacial affinity between hydrophobic carbon nanomaterials and the hydrophilic biomaterials results in low sensitivity due to the decreased electron transfer. 11 Some nanostructured metal oxides have been used to fabricate sensitive enzyme electrodes by immobilizing enzyme molecules with low isoelectric point on metal oxides with high isoelectric point through the electrostatic binding interaction. Nanostructured titania (TiO 2 ) is an excellent metal oxide nanomaterial with nontoxicity, low cost, good biocompatibility and good hydrophilicity, and is used to immobilize enzymes for fabricating enzyme electrodes.…”

Section: Introductionmentioning

confidence: 99%

Bioelectrocatalytic performance of glucose oxidase/nitrogen-doped titania nanotube array enzyme electrode

Xie

Wang

2015

J. Chem. Technol. Biotechnol.

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BACKGROUND The substrate materials of enzyme electrodes strongly affect bioelectrocatalytic activity. TiO2 nanotube arrays (NTAs) show good affinity to glucose oxidase (GOx) but low conductivity. TiN NTAs show good conductivity but low affinity to GOx. Nitrogen‐doped TiO2 (N‐TiO2) NTA with good hydrophilicity and conductivity was designed to prepare a GOx/N‐TiO2 NTA enzyme electrode to promote bioelectrocatalytic performance. RESULTS N‐TiO2 NTA had a well‐ordered nanoarray structure with slightly distorted pore mouth and wrinkled nanotube wall. N‐TiO2 NTA exhibited decreased charge transfer resistance and similar contact angle to TiO2 NTA, presenting high electrical conductivity and good hydrophilicity. GOx/N‐TiO2 NTA exhibited highly increased current response at a potential of −0.45 V, presenting good bioelectrocatalysis towards glucose. A GOx/N‐TiO2 NTA enzyme electrode was used to fabricate a glucose biosensor, showing a high sensitivity of 733.17 µA mM−1 cm−2 and a linear range of 0.05–0.85 mmol L−1 and low detection limit of 2.9 µmol L−1 for glucose determination. It exhibited high selectivity in the presence of common interfering substances and was used to determine glucose in serum. It also had good reproducibility and long‐time storage stability. In addition, the GOx/N‐TiO2 NTA enzyme electrode was used to fabricate a glucose fuel cell, showing maximum power density of 23.92 µW cm−2 as well as good bioelectrocatalytic stability. CONCLUSION High bioelectrocatalytic activity and stability of GOx/N‐TiO2 NTA proved that N‐TiO2 NTA could act as a reasonable supporting substrate material for enzyme electrodes for various bioelectrocatalytic applications. © 2015 Society of Chemical Industry

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Enzyme biosensor based on an N-doped activated carbon fiber electrode prepared by a thermal solid-state reaction

Cited by 41 publications

References 38 publications

Rapid Fenton-like degradation of methyl orange by ultrasonically dispersed nano-metallic particles

Rapid Fenton-like degradation of methyl orange by ultrasonically dispersed nano-metallic particles

Rapid Determination of Phenolic Compounds in Water Samples: Development of a Paper‐based Nanobiosensor Modified with Functionalized Silica Nanoparticles and Potato Tissue

Bioelectrocatalytic performance of glucose oxidase/nitrogen-doped titania nanotube array enzyme electrode

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