Electrochemical properties and electrocatalytic activity of FAD immobilized onto cobalt oxide nanoparticles: Application to nitrite detection

Salimi, Abdollah; Hallaj, Rahman; Mamkhezri, Hussein; Hosaini, Sayed Mohamad Taher

doi:10.1016/j.jelechem.2008.03.003

Cited by 73 publications

(34 citation statements)

References 65 publications

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“…The sensitivity is higher than many reported values [43][44][45] Full Paper AA, glucose or urea at 20-fold coexisting concentration had no interference from the detection of 0.20 mM NO 2 À , suggesting acceptable selectivity of the proposed method. A constant amperometric response was observed at PtNPs-TH-MWCNTs (r TH-Pt = 0.10 : 1)/Au after 2 weeks, and 4 % loss of the initial response signal was observed after 4 weeks by every day use, indicating the high stability of the sensing electrode.…”

Section: Nomentioning

confidence: 63%

High‐Performance Amperometric Sensors Using Catalytic Platinum Nanoparticles‐Thionine‐Multiwalled Carbon Nanotubes Nanocomposite

Yu¹,

Wang²,

Xie³

et al. 2010

Electroanalysis

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Thionine (TH) adsorbed on multiwalled carbon nanotubes (MWCNTs) increases the load and dispersion of platinum nanoparticles (PtNPs) generated by chemical reduction of H 2 PtCl 6 with NaBH 4 . Under the optimum conditions, the PtNPs-TH-MWCNTs/Au electrode electrocatalyzed the reduction and oxidation of H 2 O 2 with high sensitivity, and after glucose oxidase (GOx) adsorption it responded to glucose concentration with a sensitivity of 0.14 A M À1 cm À2. The cyclic voltammetric cathodic peak current for NO 2 À reduction on PtNPs-TH-MWCNTs/Au responded linearly to NO 2 À concentration from 0.5 to 150 mM, with a sensitivity of 5.52 A M À1 cm À2 and a detection limit of 0.2 mM.

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Section: Nomentioning

confidence: 63%

High‐Performance Amperometric Sensors Using Catalytic Platinum Nanoparticles‐Thionine‐Multiwalled Carbon Nanotubes Nanocomposite

Yu¹,

Wang²,

Xie³

et al. 2010

Electroanalysis

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“…Recently we used cobalt-oxide nanoparticles not only as excellent electrocatalyst for oxidation of H 2 O 2 and As(III) [26,27] but also as support for immobilization of hemoglobin and FAD [28,29]. In this paper we present our latest experimental results showing that electrodeposited CoOx nanoparticles can be used simultaneously for entrapping the ChOx enzyme and as charge transfer mediator for oxidation produced hydrogen peroxide in enzymatic reaction.…”

Section: Referenced Their In)mentioning

confidence: 98%

Fabrication of a Sensitive Cholesterol Biosensor Based on Cobalt‐oxide Nanostructures Electrodeposited onto Glassy Carbon Electrode

2009

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Electrodeposited cobalt oxide (CoOx) nanomaterials are not only used for immobilization of cholesterol oxidase (ChOx) but also as electron transfer mediator for oxidation of H 2 O 2 generated in the enzymatic reaction. Voltammetry and flow injection analysis (FIA) were used for determination of cholesterol. FIA determination of cholesterol with biosensors yielded a calibration curve with the following characteristics: linear range up to 50 mM, sensitivity of 43.5 nA mM À1 cm À2 and detection limit of 4.2 mM. The apparent Michaelis-Menten constant and the response time of the biosensor are 0.49 mM and 15 s, respectively. This biosensor also exhibits good stability, reproducibility and long life time.

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“…Previously, nitrite ions have been detected using electrodes modified with metal oxide NPs, including cobalt oxide NPs [18,19], ferric oxide (Fe3O4) nanospheres [20], and ferrous oxide (Fe2O3) NPs [21]. Although the determination of nitrite via CuO has seldom been studied, it is worth mentioning the report by Zhang et al [22] who casted hexamethylenetetramine-based CuO nanoflowers on the active surface of a GCE for the sensitive detection of hydrogen peroxide (H2O2) and nitrites.…”

Section: Introductionmentioning

confidence: 99%

Construction of an Ultrasensitive and Highly Selective Nitrite Sensor Using Piroxicam-Derived Copper Oxide Nanostructures

et al. 2018

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Abstract:In this work, piroxicam-based copper oxide nanostructures (Px-CuO NSs) were synthesized via hydrothermal precipitation in the presence of ammonia. The prepared Px-CuO NSs were subjected to scanning electron microscopy (SEM) and X-ray diffraction (XRD) to obtain morphology and crystallinity, respectively. The SEM study reveals that these Px-CuO NSs are in the form of porous rose-like nanopetals with dotted particles on their surface, while the XRD study confirms their crystalline nature. The Px-CuO NS-based sensors were fabricated by drop-casting them onto the surface of a glassy carbon electrode (GCE) and they were tested for nitrite detection using voltammetry and amperometry. The results show these Px-CuO NSs to be highly stable on the GCE surface with linear amperometric (current vs. time) responses to wide range of nitrite concentrations from 100 to 1800 nM, with limits of detection (LOD) and quantification (LOQ) being 12 nM and 40 nM, respectively. Importantly, the fabricated sensor showed negligible effects for a 10-fold higher concentration of common interfering agents and exhibited excellent selectivity. It was applied successfully for nitrite detection in water samples such as river water, mineral water, and tap water.

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Electrochemical properties and electrocatalytic activity of FAD immobilized onto cobalt oxide nanoparticles: Application to nitrite detection

Cited by 73 publications

References 65 publications

High‐Performance Amperometric Sensors Using Catalytic Platinum Nanoparticles‐Thionine‐Multiwalled Carbon Nanotubes Nanocomposite

High‐Performance Amperometric Sensors Using Catalytic Platinum Nanoparticles‐Thionine‐Multiwalled Carbon Nanotubes Nanocomposite

Fabrication of a Sensitive Cholesterol Biosensor Based on Cobalt‐oxide Nanostructures Electrodeposited onto Glassy Carbon Electrode

Construction of an Ultrasensitive and Highly Selective Nitrite Sensor Using Piroxicam-Derived Copper Oxide Nanostructures

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