Electrocatalytic characteristics of uric acid oxidation at graphite–zeolite-modified electrode doped with iron (III)

Mazloum-Ardakani, Mohammad; Akrami, Zakyeh; Kazemian, Hossein; Zare, Hamid R.

doi:10.1016/j.jelechem.2005.09.015

Cited by 92 publications

(45 citation statements)

References 29 publications

(32 reference statements)

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“…Recent examples of electrocatalysts incorporated by ion exchange are phenothiazine-based mediators [88,95] and iron(III) [53,128]. Mordenite doped with methylene blue and faujasite (X) exchanged with methylene green were incorporated in carbon paste electrodes and successfully applied to the determination of ascorbic acid [88] and hydrogen peroxide [95], respectively.…”

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confidence: 99%

Electroanalytical Applications of Microporous Zeolites and Mesoporous (Organo)Silicas: Recent Trends

Walcarius¹

2008

Electroanalysis

149

101

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Microporous zeolites and ordered mesoporous (organo)silicas have been widely used as electrode modifiers because of their attractive properties (ion exchange and size selectivity of zeolites, well ordered nanoreactors containing a high number of widely accessible active centers in mesoporous (organo)silicas). These properties have been intelligently combined to selected redox processes to improve the response of the resulting modified electrodes or to design novel electrochemical detection schemes. This up-to-date review provides the recent advances made in the electroanalytical applications of zeolite modified electrodes and discusses the interest of ordered mesoporous (organo)silica materials in electroanalysis.

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mentioning

confidence: 99%

Electroanalytical Applications of Microporous Zeolites and Mesoporous (Organo)Silicas: Recent Trends

Walcarius¹

2008

Electroanalysis

149

101

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“…The different pore sizes of synthetic zeolites open up a wide range of possibilities in terms of sieving molecules of different size or shape from gases and liquids [3,4]. On the other hand, in zeolite structures, Si atoms can be substituted with Al atoms, resulting in a negatively charged structure.…”

Section: Introductionmentioning

confidence: 99%

“…Such ion exchange properties of zeolites make them inevitable candidates for preparing ion-selective membranes for potentiometric cation sensing [5]. Zeolites offer selectivity based on the size, shape, and charge of the reactants [3]. Another advantage of zeolites is that their basic/acidic nature can be modified by varying the Si/Al ratio with higher ratios indicating higher hydrophobicity and lower ion-exchange properties.…”

Section: Introductionmentioning

confidence: 99%

Application of Zeolites for Immobilization of Glucose Oxidase in Amperometric Biosensors

Горюшкина

Akata

Sacco

et al. 2014

SEMST

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Abstract. An investigation was performed to evaluate the effect of different zeolites (silicalite, zeolite Y and zeolite Beta with varying Si/Al ratio) on the performance of glucose amperometric biosensor based on immobilized glucose oxidase (GOD). It was observed that detection limit of biosensors based on GOD without zeolite was 0.64 mM of glucose. However, in the case of GOD immobilization with zeolites NH 4 -Beta-25, Na-Beta and silicalites, biosensors with smaller detection limits within the range of 0.01 to 0.04 mM of glucose were obtained. The study of selectivity of designed biosensors showed that biosensor based on GOD immobilized with zeolite NH 4 -Beta-25 was much selective comparing with biosensor based on GOD without zeolites. Stability of developed devises also was investigated, and in the case of biosensor with GOD and Silicalite-1 it was higher than for GOD without zeolite. Thus zeolites of different types can be effectively used for GOD immobilization in glucose amperometric biosensors development for optimization of sensitivity, selectivity and stability of these devises. Àíîòàö³ÿ. Ìåòîþ äîñë³äaeåííÿ áóëà îö³íêà âïëèâó ð³çíèõ òèï³â öåîë³ò³â (ñèë³êàë³ò³â, öå-îë³òó Y òà öåîë³ò³â Áåòà ç ð³çíèì ñï³ââ³äíîøåííÿì ñèë³ö³é-àëþì³í³é) íà ðîáî÷³ õàðàêòåðèñ-òèêè ãëþêîçíîãî àìïåðîìåòðè÷íîãî á³îñåíñîðà íà îñíîâ³ ³ììîá³ë³çîâàíî¿ ãëþêîçîîêñèäà-çè (ÃÎÄ). Áóëî âñòàíîâëåíî, ùî ãðàíèöÿ âèçíà÷åííÿ ñóáñòðàòó äëÿ á³îñåíñîðà ç ÃÎÄ áåç öåîë³ò³â ñòàíîâèòü 0,64 ìÌ ãëþêîçè, òîä³ ÿê ïðè ³ììîá³ë³çàö³¿ ÃÎÄ ç öåîë³òàìè NH 4 -Áå-òà-25, Na-Áåòà òà ñèë³êàë³òàìè áóëè îòðèìàí³ á³îñåíñîðè ç ìåíøåþ ãðàíèöåþ âèçíà÷åí-íÿ -â³ä 0,01 äî 0,04 ìÌ. Äîñë³äaeåííÿ ñåëåêòèâíîñò³ ñòâîðåíèõ á³îñåíñîð³â ïîêàçàëî, ùî ñåíñîð íà îñíîâ³ ÃÎÄ, ³ììîá³ë³çîâàíî¿ ç öåîë³òîì NH 4 -Áåòà-25, áóâ çíà÷íî ñåëåêòèâí³øèì ó ïîð³âíÿíí³ ç ñåíñîðîì íà îñíîâ³ ÃÎÄ áåç öåîë³ò³â. Òàêîae áóëî ïðîàíàë³çîâàíî ñòàá³ëü-í³ñòü ðîçðîáëåíèõ á³îñåíñîð³â òà ïîêàçàíî, ùî âîíà áóëà âèùîþ äëÿ ÃÎÄ, ³ììîá³ë³çîâàíî¿ ç Keywords: amperometric biosensor, glucose oxidase, zeolites, glucose

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“…The mixture of zeolite and graphite has been proposed since 1980s in various forms [7], leading to a class of electrodes named zeolite modified electrodes (ZMEs) [8].…”

Section: Introductionmentioning

confidence: 99%

Amperometric detection of dopamine and ascorbic acid with zeolite-graphite composite microelectrodes

et al. 2012

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Natural and synthetic zeolites were used to modify synthetic graphite based composite microelectrodes envisaging their use for simultaneous/selective detection of ascorbic acid (AA) and dopamine (DA) in aqueous solutions. Both natural and synthetic zeolite-modified synthetic graphite composite microelectrodes (ZN-GEC and SZ-GEC) were obtained in epoxy matrices, and the optimum composition was selected based on the electrochemical behavior. The composite electrodes were characterized electrochemically by cyclic voltammetry (CV) using the classical ferrycianide/ferrocyanide system method, in comparison with bare graphite composite microelectrode (GEC). The electrochemical oxidation of AA occurred at all three microelectrodes and the slowest kinetics was noticed for SZ-GEC, due to the synthetic zeolite presence with certain peculiarities in relation to the selectivity and the catalytic effect, while ZN-GEC and GEC microelectrodes exhibited very good sensitivity for AA detection in aqueous solution. Taking into consideration the fact that DA and AA coexist in real extracellular brain fluid and the fact that SZ-GEC microelectrode did not exhibited a good sensitivity towards AA detection, but a very good sensitivity for DA was obtained, makes this composite material a good

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Electrocatalytic characteristics of uric acid oxidation at graphite–zeolite-modified electrode doped with iron (III)

Cited by 92 publications

References 29 publications

Electroanalytical Applications of Microporous Zeolites and Mesoporous (Organo)Silicas: Recent Trends

Electroanalytical Applications of Microporous Zeolites and Mesoporous (Organo)Silicas: Recent Trends

Application of Zeolites for Immobilization of Glucose Oxidase in Amperometric Biosensors

Amperometric detection of dopamine and ascorbic acid with zeolite-graphite composite microelectrodes

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