Hemin-graphene oxide-pristine carbon nanotubes complexes with intrinsic peroxidase-like activity for the detection of H2O2 and simultaneous determination for Trp, AA, DA, and UA

Zhang, Yu; Xia, Zhi; Liu, Hong; Yang, Manyi; Lin, Longli; Li, Qianzhu

doi:10.1016/j.snb.2013.07.010

Cited by 74 publications

(37 citation statements)

References 31 publications

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“…The limit of detection (3S/N) was estimated to be 7.2 × 10 −8 mol · L −1 , which was lower than previously reported results. 1,[27][28][29] For comparison, the amperometric responses of pure TiO 2 and hemin modified electrodes to H 2 O 2 were also studied under the same experimental conditions. As shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

Hemin Modified TiO₂Nanoparticles with Enhanced Photoelectrocatalytic Activity for Electrochemical and Photoelectrochemical Sensing

Zhu

Yan

et al. 2016

J. Electrochem. Soc.

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Hemin-functionalized TiO 2 nanoparticles were prepared and assembled on glassy carbon electrode through the electrostatic attraction between positively charged poly(diallyldimethylammonium chloride) and negatively charged hemin and TiO 2 . The scanning electron microscopy and X-ray diffraction characterization showed that the assembled hemin-TiO 2 film displayed a mesoporous structure comprising plenty of TiO 2 nanoparticles in rutile phase. The Fourier transform infrared spectra and UV-visible diffuse reflectance spectra indicated that hemin was successfully incorporated into TiO 2 film and significantly enhanced the absorption of TiO 2 film to visible light. The hemin-TiO 2 film exhibited a pair of well-defined redox peaks of hemin by cyclic voltammetry, which could effectively catalyze the electroreduction of H 2 O 2 . Thus, the hemin-TiO 2 modified electrode was employed as an electrochemical sensor for H 2 O 2 determination, showing a sensitive response linearly proportional to the concentration of H 2 O 2 from 3.0 × 10 −7 to 4.7 × 10 −4 mol · L −1 . At the same time, the photoelectrocatalytic activity of TiO 2 under visible light illumination was dramatically promoted by hemin. The hemin-TiO 2 modified electrode produced a photoelectrochemical response linearly proportional to hydroquinone in the concentration range from 4. Hemin is an iron-containing porphyrin, namely protoporphyrin IX Fe(III) complex, which is well-known as the active center of the hemeprotein family. Because of the reversible reaction of Fe(III)/Fe(II) redox couple, hemin has been extensively demonstrated as an efficient electrocatalyst for many small molecules such as hydrogen peroxide, 1-3 oxygen, 4 nitrite, 5 L-tyrosine 6 and artemisinin. 7 Generally, hemin is loaded on some supporting materials to avoid the molecular aggregation of hemin molecules in aqueous solution and improve the stability and activity of catalyst.8 On the other hand, hemin is a structural analogue of chlorophyll, which can serve as a promising photosensitizer for TiO 2 photocatalyst to harvest visible light. 9,10 Moreover, the presence of Fe(III) porphyrin ring on the surface of TiO 2 can reduce the electron-hole recombination rate and act as a mediator for continuous production of enriched concentration of hydroxyl radicals to enhance the photocatalytic activity of TiO 2 . 11TiO 2 is the most intensively studied photocatalyst for degradation of various organic pollutants.12 In recent years, TiO 2 nanomaterials have been widely utilized for fabrication of sensing devices because of their fascinating properties such as large surface area, good biocompatibility, high stability, and unique electronic and photocatalytic performances.13 When catalytic materials including metal nanoparticles, small molecules and biological macromolecules are immobilized on nanostructured TiO 2 , the obtained nanocomposites can act as bifunctional catalysts which not only possess the catalytic activity of introduced materials but also preserve the intrinsic photocatalytic capacity of T...

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Section: Resultsmentioning

confidence: 99%

Hemin Modified TiO₂Nanoparticles with Enhanced Photoelectrocatalytic Activity for Electrochemical and Photoelectrochemical Sensing

Zhu

Yan

et al. 2016

J. Electrochem. Soc.

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“…The detection limit is lower by at least one order of magnitude than those of most CNTs-based composite electrodes. 17,[27][28][29] For 5 μM UA, the relative standard deviation (RSD %) is 7.5% (n = 6), confirming that the modified electrode for the determination of UA is stable. For the selective determination of UA at the modified electrode, DPV was carried out to study the interference of AA and DA.…”

Section: Electrocatalytic Oxidation Of Aa Da and Ua At Mwcnts-nad + mentioning

confidence: 92%

A Nicotinamide Adenine Dinucleotide Dispersed Multi-walled Carbon Nanotubes Electrode for Direct and Selective Electrochemical Detection of Uric Acid

Chen

et al. 2015

ANAL. SCI.

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+ has an adenine subunit and a nicotinamide subunit, which can absorb MWCNTs through the π-stacking interaction, 24 A nanocomposite platform built with multi-walled carbon nanotubes (MWCNTs) and nicotinamide adenine dinucleotide (NAD + ) via a noncovalent interaction between the large π systems in NAD + molecules and MWCNTs on a glassy carbon substrate was successfully developed for the sensitive and selective detection of uric acid (UA) in the presence of ascorbic acid (AA), dopamine (DA). NAD + has an adenine subunit and a nicotinamide subunit, which enabled interaction with the purine subunit of UA through a strong π-π interaction to enhance the specificity of UA. Compared with a bare glassy carbon electrode (GCE) and MWCNTs/GCE, the MWCNTs-NAD + /GCE showed a low background current and a remarkable enhancement of the oxidation peak current of UA. Using differential pulse voltammetry (DPV), a high sensitivity for the determination of UA was explored for the MWCNTs-NAD + modified electrode. A linear relationship between the DPV peak current of UA and its concentration could be obtained in the range of 0.05 -10 μM with the detection limit as low as 10 nM (S/N = 3). This present strategy provides a novel and promising platform for the detection of UA in human urine and serum samples.

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“…The synthesis of H-GN hybrid materials by simple wet-chemical method (Zhang et al 2013a) is shown in Fig. 1.…”

Section: Synthesismentioning

confidence: 99%

Graphene/Hemin Hybrid Material as a Catalyst for Degradation of Alkaline Lignin with Hydrogen Peroxide

Chen

Yan

2017

BioResources

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A graphene/hemin (H-GN) catalyst for lignin degradation was prepared by a wetchemistry method with graphene oxide and hemin. Hemin was absorbed onto the graphene surface through π-π interaction. Graphene served as a supporting material for hemin, providing a large contact area between the active molecules of catalyst and substrate, as well as protecting hemin from self-oxidation and maintaining its active molecules. The H-GN catalyst showed high catalytic efficiency in the degradation of alkaline lignin under gentle conditions. At pH 13.0, the degradation rate was 49.7% with H-GN and H2O2 (mass ratio of H2O2 to lignin of 10:1) under 60 °C, which was higher than 34.9% for non-catalyst degradation. At pH 13.2, it was as high as 92.9 wt.% at 100 °C. The lignin was decomposed into small molecules with styrene as the main final product below pH 13 and with the major products of 4-hydroxy-4-methyl-2-pentanone and bis(2-ethylhexyl) phthalate at pH 13.2.

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Hemin-graphene oxide-pristine carbon nanotubes complexes with intrinsic peroxidase-like activity for the detection of H2O2 and simultaneous determination for Trp, AA, DA, and UA

Cited by 74 publications

References 31 publications

Hemin Modified TiO₂Nanoparticles with Enhanced Photoelectrocatalytic Activity for Electrochemical and Photoelectrochemical Sensing

Hemin Modified TiO₂Nanoparticles with Enhanced Photoelectrocatalytic Activity for Electrochemical and Photoelectrochemical Sensing

A Nicotinamide Adenine Dinucleotide Dispersed Multi-walled Carbon Nanotubes Electrode for Direct and Selective Electrochemical Detection of Uric Acid

Graphene/Hemin Hybrid Material as a Catalyst for Degradation of Alkaline Lignin with Hydrogen Peroxide

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Hemin-graphene oxide-pristine carbon nanotubes complexes with intrinsic peroxidase-like activity for the detection of H2O2 and simultaneous determination for Trp, AA, DA, and UA

Cited by 74 publications

References 31 publications

Hemin Modified TiO2Nanoparticles with Enhanced Photoelectrocatalytic Activity for Electrochemical and Photoelectrochemical Sensing

Hemin Modified TiO2Nanoparticles with Enhanced Photoelectrocatalytic Activity for Electrochemical and Photoelectrochemical Sensing

A Nicotinamide Adenine Dinucleotide Dispersed Multi-walled Carbon Nanotubes Electrode for Direct and Selective Electrochemical Detection of Uric Acid

Graphene/Hemin Hybrid Material as a Catalyst for Degradation of Alkaline Lignin with Hydrogen Peroxide

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Product

Resources

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Hemin Modified TiO₂Nanoparticles with Enhanced Photoelectrocatalytic Activity for Electrochemical and Photoelectrochemical Sensing

Hemin Modified TiO₂Nanoparticles with Enhanced Photoelectrocatalytic Activity for Electrochemical and Photoelectrochemical Sensing