Direct electrochemistry and electrocatalytic activity of catalase immobilized onto electrodeposited nano-scale islands of nickel oxide

Salimi, Abdollah; Sharifi, Ensiyeh; Noorbakhsh, Abdollah; Soltanian, Saeid

doi:10.1016/j.bpc.2006.11.004

Cited by 135 publications

(69 citation statements)

References 47 publications

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“…This includes nanoparticles (graphite, 20 silica, 264,265 gold, [266][267][268] Pt,etc. )andnanotubes, 235,269 quantum dots, and mesoporous materials (electrodeposited oxides, 278,271 ITO, carbon, etc). The reader will find many examples in recent reviews.…”

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confidence: 99%

Direct Electrochemistry of Redox Enzymes as a Tool for Mechanistic Studies

2008

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confidence: 99%

Direct Electrochemistry of Redox Enzymes as a Tool for Mechanistic Studies

2008

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“…In this work, CdO shows better sensitivity than other metal oxide ( Table 1). The linear range of the CdO-MWCNT modified electrode is also comparable with electrodes modified with metal or metal oxide nanoparticles [10][11][12][13][14][15][16][17][18][19][20][21][22].…”

Section: Amperometric Detection Of H 2 O 2 At the Modified Cdo/mwcnt-mentioning

confidence: 61%

“…Nanoscale metal oxides are a very promising class of electrocatalysts because they are active, inexpensive and thermodynamically stable [9]. To date, different metal oxide particles and nanoparticles such as copper oxide [10] zirconium oxide [11], ruthenium oxide [12], cobalt oxide [13,14], iron oxide [15,16] and nickel oxide [17][18][19], manganese oxide [20], titanium oxide [21] and zinc oxide [22] have been successfully used for sensing H 2 O 2 . Nanoscale CdO with different morphologies has been synthesized [23][24][25] and this oxide is known to possess high electrical conductivity, high carrier concentration and high transparency in the visible range of the electromagnetic spectrum [26].…”

Section: Introductionmentioning

confidence: 99%

A sensitive nonenzymatic hydrogen peroxide sensor using cadmium oxide nanoparticles/multiwall carbon nanotube modified glassy carbon electrode

Butwong

Zhou

Ngeontae

et al. 2014

Journal of Electroanalytical Chemistry

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“…In the case of the catalytic oxidation of HRP to H 2 O 2 , the reaction of electrode is considered as a typical characteristic of Michaelis-Menten kinetics when a current response plateau can also be found at higher than 430 μM. The biological activity of an immobilized enzyme can be estimated by the value of Nano-NiO/MWCNTs/PANI presents more smaller than those of the HRP/Nano-CeO 2 /ITO, Mb/NiO/MWCNTs/GC, HRP/Nano-Pt-PNR/MWCNTs/GC and Cat/Nano-NiO/ GC in Table I 37 and 0.96 mM, 22 respectively. It is also found that the immobilization of nanostructure on the surface of PANI film shows more excellent biological catalytic performance among all modified electrode.…”

Section: Resultsmentioning

confidence: 96%

Nickel Oxide Nanoparticles Immobilized on MWCNTs/PANI Composite Film as an Electron Transfer Facilitator for Horseradish Peroxidase: Direct Electron Transfer and H₂O₂Determination

Zhang

Yang

Guo

et al. 2016

J. Electrochem. Soc.

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In this paper, we developed a new method for immobilization of horseradish peroxidase (HRP) on Nano-NiO/ MWCNTs/PANI composite film, which can effectively promote the direct electron transfer and electrocatalysis of enzyme in neutral solution. This composite film modified electrode was systematically investigated by altering the thickness of composite film, pH value of solution, and the mass ratio of MWCNT to NiO nanoparticles. The study showed that the effective immobilization of horseradish peroxidase on Nano-NiO/ MWCNTs/PANI was 30 cycles of cyclic voltammetry for the preparation of PANI film and the mass ratio of 10:1. The composite film possesses a high catalytic activity in pH 6.8 buffer solution containing H 2 O 2 . The plot of the response current to H 2 O 2 concentration exhibited a linear relation at a range of 3.0 × 10 −6 to 4.3 × 10 −4 M, with a correlation coefficient of 0.998. The detection limit is 4.3 × 10 −7 M(S/N = 3). These results indicated that the modified electrode was beneficial to retain the catalytic activity of the enzyme, and possessed good stability and reproducibility. The electrochemical technology has been most extensively applied in the determination of H 2 O 2 as an inexpensive and effective way. However, it is difficult to carry out slow reaction kinetics for many electrode materials in detecting hydrogen peroxide process, and is required a high overpotential to avoid interference of other compounds in the same potential region. Hence, the electrode was generally modified by polymer film to rapidly and sensitively measure H 2 O 2 . In the past research, polyaniline (PANI) has been widely investigated as a key modifying material in chemical and biological sensors 1-3 due to good environmental stability, facile synthesis, electrical and optical properties, and unique doping/de-doping behavior, 4,5 and its electrical property can be reversibly modulated by changing the state of oxidation. Additionally, it is suitable for PANI film due to a moderating effect for enzyme catalytic reaction signal and compatibility. 6,7 However, the conductivity of PANI depends on the pH values of solutions. Generally, the excellent redox characteristics are exhibited in acidic aqueous solutions at pH up to about 5, while a low conductivity can be found in a neutral solution and/or alkaline solutions. Therefore, the modified electrode with polyaniline cannot fabricate a high-sensitivity biosensor. Moreover, the low conductivity cannot effectively mediate electron transfer between redox enzymes and conductive supports in biosensor systems. To improve the conductivity of polyaniline film, a conductive material with high conductivity, such as carbon nanotube(CNT), is introduced into PANI matrix to form conducting polymer/carbon nanotube composites. 8,9 The addition of CNT promotes the electron transfer rate between film and electrode in this composite, and possesses high electroactivity in a neutral pH environment. [10][11][12] The combination between CNTs and polymer matrix could effectively improve sol...

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Direct electrochemistry and electrocatalytic activity of catalase immobilized onto electrodeposited nano-scale islands of nickel oxide

Cited by 135 publications

References 47 publications

Direct Electrochemistry of Redox Enzymes as a Tool for Mechanistic Studies

Direct Electrochemistry of Redox Enzymes as a Tool for Mechanistic Studies

A sensitive nonenzymatic hydrogen peroxide sensor using cadmium oxide nanoparticles/multiwall carbon nanotube modified glassy carbon electrode

Nickel Oxide Nanoparticles Immobilized on MWCNTs/PANI Composite Film as an Electron Transfer Facilitator for Horseradish Peroxidase: Direct Electron Transfer and H₂O₂Determination

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Direct electrochemistry and electrocatalytic activity of catalase immobilized onto electrodeposited nano-scale islands of nickel oxide

Cited by 135 publications

References 47 publications

Direct Electrochemistry of Redox Enzymes as a Tool for Mechanistic Studies

Direct Electrochemistry of Redox Enzymes as a Tool for Mechanistic Studies

A sensitive nonenzymatic hydrogen peroxide sensor using cadmium oxide nanoparticles/multiwall carbon nanotube modified glassy carbon electrode

Nickel Oxide Nanoparticles Immobilized on MWCNTs/PANI Composite Film as an Electron Transfer Facilitator for Horseradish Peroxidase: Direct Electron Transfer and H2O2Determination

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Nickel Oxide Nanoparticles Immobilized on MWCNTs/PANI Composite Film as an Electron Transfer Facilitator for Horseradish Peroxidase: Direct Electron Transfer and H₂O₂Determination