Enzyme-free detection of hydrogen peroxide from cerium oxide nanoparticles immobilized on poly(4-vinylpyridine) self-assembled monolayers

Gaynor, James D.; Karakoti, Ajay; Inerbaev, Talgat M.; Sanghavi, Shail; Nachimuthu, Ponnusamy; Shutthanandan, V.; Seal, Sudipta; Thevuthasan, Suntharampillai

doi:10.1039/c3tb20204f

Cited by 19 publications

(21 citation statements)

References 34 publications

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“…Hydrogen peroxide can undergo catalytic decomposition via reaction or by self‐dissociation in aqueous media by Equation :

true H_{2} O_{2} \to H_{2} O + \frac{1}{2} O_{2}

true H_{2} O_{2} \to 2 {normalH}^{+} + O_{2}^{2 -}

…”

Section: Resultsmentioning

confidence: 99%

“…Thep otential application of N-CNOs/GCEw as investigated by its performance for reduction of H 2 O 2 comparedw ith the CNOs modified GCE electrode in at hree-electrode cell (working electrode:G CE, reference:A g/ AgCl and counter:P t). Hydrogen peroxide can undergo catalytic decompositionv ia reaction(3) or by self-dissociation in aqueous mediab yE quation (4): [52] Analysis of theC Vs presented in Figure 8a llowed the following conclusions:( i) no obvious electrochemical reduction peak was observed at ab are GCE when hydrogen peroxidew as added;( ii)the nitrogen-dopeds amples have ah igher catalytic activity than the undoped prepared at the same temperatures; (iii)the highest electrocatalytic activity waso bserved for the samples prepared at 1650 8C; (iv) linear increases of reduction currents were observed with increasing H 2 O 2 concentrations from 4t o5 0mmol dm À3 ;a nd (v) the reduction of H 2 O 2 also occurs at lower overpotentials with N-CNOs than at undoped CNOs. Our research indicates that nitrogen-doping of CNOs is as imple method to increase their electrocatalytic properties.…”

Section: Electrochemical and Electrocatalyticp Ropertieso Fc Nos And mentioning

confidence: 99%

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Improvement of the Structural and Chemical Properties of Carbon Nano‐onions for Electrocatalysis

et al. 2017

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Heteroatom doping of carbon nanostructures is a convenient tool to control their physicochemical properties and to make them suitable for various applications. Carbon nano‐onions (CNOs) doped with nitrogen (N‐CNOs) have been prepared by annealing aminated‐nanodiamond particles (AM‐NDs) at different temperatures (1150, 1450 and 1650 °C) in an inert He atmosphere. Their physicochemical properties were compared with those of pristine CNOs obtained from non‐functionalized NDs under the same experimental conditions. The carbon nanostructures were characterized using transmission (TEM) and scanning (SEM) electron microscopy, X‐ray powder diffraction (XRD), Raman and Fourier transform infrared (FTIR) spectroscopy, porosimetry, and differential‐thermogravimetric analyses (TGA‐DTG). Their physicochemical properties are systematically discussed for undoped and for the nitrogen‐doped CNO samples. The results reveal that the surface morphology and the structure of undoped and nitrogen‐doped CNOs vary with the annealing temperature. All of these materials were electrochemically tested as electrode materials for enzyme‐free catalysis of hydrogen peroxide. The nitrogen‐doped carbon nanostructures have a higher catalytic activity than undoped nanostructures obtained under the same experimental conditions.

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“…Hydrogen peroxide can undergo catalytic decomposition via reaction or by self‐dissociation in aqueous media by Equation :

true H_{2} O_{2} \to H_{2} O + \frac{1}{2} O_{2}

true H_{2} O_{2} \to 2 {normalH}^{+} + O_{2}^{2 -}

…”

Section: Resultsmentioning

confidence: 99%

Section: Electrochemical and Electrocatalyticp Ropertieso Fc Nos And mentioning

confidence: 99%

Improvement of the Structural and Chemical Properties of Carbon Nano‐onions for Electrocatalysis

et al. 2017

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“…A thermometer-like patterned paper was fabricated using polymer screen-printing method. 23,24 Another 10 mL of deionized water was added to the sample reservoir to elute residual H 2 O 2 , which might remain in the sample zone (schematic diagram for the analytical procedure is shown in Fig. CeO 2 nanoparticles were uniformly coated on the channel part of the patterned paper (detection zone, Fig.…”

Section: Distance-based Detection Of H 2 O 2 Using Ceo 2 Nanoparticlesmentioning

confidence: 99%

“…Henry's group recently introduced a distancebased measurement paper device, where quantication was achieved by measuring the length of a colored zone generated by the reaction of the analyte with an indicator along the hydrophilic channel. 23 The addition of H 2 O 2 induced the oxidation of Ce 3+ to Ce 4+ , resulting in changes to Ce 3+ /Ce 4+ ratio causing the resulting color (list of the chemical equations is shown in ESI †). 6A).…”

Section: H 2 O 2 Analysismentioning

confidence: 99%

One-step polymer screen-printing for microfluidic paper-based analytical device (μPAD) fabrication

Sameenoi

Nongkai

Nouanthavong

et al. 2014

Analyst

157

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We report a simple, low-cost, one-step fabrication method for microfluidic paper-based analytical devices (μPAD) using only polystyrene and a patterned screen. The polystyrene solution applied through the screen penetrates through the paper, forming a three-dimensional hydrophobic barrier, defining a hydrophilic analysis zone. The optimal polystyrene concentration and paper types were first investigated. Adjusting polystyrene concentration allows for various types of paper to be used for successful device fabrication. Using an optimized polystyrene concentration with Whatman#4 filter paper, a linear relationship was found to exist between the design width and the printed width. The smallest hydrophilic channel and hydrophobic barrier that can be obtained are 670 ± 50 μm and 380 ± 40 μm, respectively. High device-to-device fabrication reproducibility was achieved yielding a relative standard deviation (%RSD) in the range of 1.12-2.54% (n = 64) of the measured diameter of the well-shaped fabricated test zones with a designed diameter of 5 and 7 mm. To demonstrate the significance of the fabricated μPAD, distance-based and well-based paper devices were constructed for the analysis of H2O2 and antioxidant activity, respectively. The analysis of H2O2 in real samples using distance-based measurement with CeO2 nanoparticles as the colorimetric agent produced the same results at 95% confidence level, as those obtained using KMnO4 titration. A proof-of-concept antioxidant activity determination based on the 2,2-diphenyl-1-picrylhydrazyl (DPPH) assay was also demonstrated. The results verify that the polymer screen-printing method can be used as an alternative method for μPAD fabrication.

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“…In this paper, a lowcost, simple, portable and sensitive paper-based electrochemical sensor was developed for the detection of K-562 cells (one of the most aggressive human chronic myelogenous leukemia cell lines) based on the release of H 2 O 2 from cells on origami paper device. Nano-materials have significantly contributed to the enlargement of the sensing interface [23][24][25]. Herein, 3D-AuNPs/GN composites with large specific surface area and good electroconductivity were synthesized to modify the working electrode for the fabrication of sensing interface in the assay [26].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical K-562 cells sensor based on origami paper device for point-of-care testing

Zhang

et al. 2015

Talanta

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Enzyme-free detection of hydrogen peroxide from cerium oxide nanoparticles immobilized on poly(4-vinylpyridine) self-assembled monolayers

Cited by 19 publications

References 34 publications

Improvement of the Structural and Chemical Properties of Carbon Nano‐onions for Electrocatalysis

Improvement of the Structural and Chemical Properties of Carbon Nano‐onions for Electrocatalysis

One-step polymer screen-printing for microfluidic paper-based analytical device (μPAD) fabrication

Electrochemical K-562 cells sensor based on origami paper device for point-of-care testing

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