A glassy carbon electrode modified with an iron N4-macrocycle and reduced graphene oxide for voltammetric sensing of dissolved oxygen

Silva, Saimon Moraes; Aguiar, Lucas F.; Carvalho, Rita Maria Sousa; Tanaka, Auro Atsushi; Damos, Flávio Santos; Luz, Rita C. S.

doi:10.1007/s00604-016-1750-6

Cited by 18 publications

(12 citation statements)

References 32 publications

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“…Electrochemical dissolved oxygen sensors are now the most widely used sensors because they can realize in situ online measurements [48]. Most of the research on electrochemical dissolved oxygen sensors focuses on improving the sensitive materials, and it is expected that the service life of the sensor will be improved by using new sensitive materials [49]. Electrochemical dissolved oxygen sensors can be divided into current-type, conductance-type, and potentiometric-type sensors according to their different output signals.…”

Section: Dissolved Oxygen Detection Technologiesmentioning

confidence: 99%

Review of Dissolved Oxygen Detection Technology: From Laboratory Analysis to Online Intelligent Detection

Wei

Jiao

et al. 2019

Sensors

127

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Dissolved oxygen is an important index to evaluate water quality, and its concentration is of great significance in industrial production, environmental monitoring, aquaculture, food production, and other fields. As its change is a continuous dynamic process, the dissolved oxygen concentration needs to be accurately measured in real time. In this paper, the principles, main applications, advantages, and disadvantages of iodometric titration, electrochemical detection, and optical detection, which are commonly used dissolved oxygen detection methods, are systematically analyzed and summarized. The detection mechanisms and materials of electrochemical and optical detection methods are examined and reviewed. Because external environmental factors readily cause interferences in dissolved oxygen detection, the traditional detection methods cannot adequately meet the accuracy, real-time, stability, and other measurement requirements; thus, it is urgent to use intelligent methods to make up for these deficiencies. This paper studies the application of intelligent technology in intelligent signal transfer processing, digital signal processing, and the real-time dynamic adaptive compensation and correction of dissolved oxygen sensors. The combined application of optical detection technology, new fluorescence-sensitive materials, and intelligent technology is the focus of future research on dissolved oxygen sensors.

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Section: Dissolved Oxygen Detection Technologiesmentioning

confidence: 99%

Review of Dissolved Oxygen Detection Technology: From Laboratory Analysis to Online Intelligent Detection

Wei

Jiao

et al. 2019

Sensors

127

View full text Add to dashboard Cite

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“…So far,most electrochemical DO biosensors werereported to utilize precious metals( Pt [28] and Au [29] )o rn on-precious metals (Fe [30] and Co [2] )a se lectrocatalysts, which are expensive and toxic to tissues. Therefore, nontoxic and metal-free carbon electrocatalysts are very attractive for the fabrication of wear-able electrochemical DO biosensors.…”

Section: Resultsmentioning

confidence: 99%

Microporous N,P‐Codoped Graphitic Nanosheets as an Efficient Electrocatalyst for Oxygen Reduction in Whole pH Range for Energy Conversion and Biosensing Dissolved Oxygen

Lin

Chen

et al. 2018

Chemistry A European J

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Microporous N,P-codoped graphitic nanosheets (N,P-CMP-1000) were synthesized by thermal annealing (1000 °C) of as-synthesized conjugated microporous polymers (CMPs) in the presence of phytic acid, which can be used as an effective metal-free electrocatalyst for the oxygen reduction reaction (ORR) for energy conversion. In the whole pH range (i.e. alkaline, acidic, and neutral solutions), the obtained N,P-CMP-1000 exhibits superior electrocatalytic activity for ORR with a low overpotential, high current density, and good stability. Furthermore, N,P-CMP-1000 can also be applied for electrochemically sensing dissolved oxygen (DO), with a high sensitivity (1.89 μA mg L) and broad detection range (2.56 to 16.65 mg L ) due to its good electrocatalytic performance towards ORR in neutral solution. In vitro cytotoxicity tests (CCK-8 and Live/Dead Cell Double Staining Assay) of N,P-CMP-1000 extracts demonstrated its good biocompatibility to Human Corneal Epithelial Cells (HCEC), which shows its great potential as an eye-wearable biosensor for sensing DO in tears.

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“…On the other hand, the chemical modification of electrodes has become a rapidly growing area of research because of its importance in various domains, such as electro-and photo-catalysis, electro-synthesis, electro-analysis and molecular devices [11][12][13][14][15]. Chronologically, the concept of the modified electrode (ME) has attracted the attention of many researchers as soon as the first prototypes were produced by chemical modification of the metal surfaces.…”

Section: Introductionmentioning

confidence: 99%

Elaboration of new modified electrodes (MEs) by electropolymerization of Cu(II)-Schiff base complexes bearing pyrrole moieties: Application in electroreduction of acetophenone and carbon dioxide

Amer

Ilikti

Beyens

et al. 2019

European Polymer Journal

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Novel functional Schiff base ligands bearing pyrrole moieties in their structures, L1:1-(3-Pyrrole-1-yl-propylimino-methyl)-naphtalen-2-ol, L2:1-(3-Pyrrole-1-yl-propylimino-methyl)phenol and L3: 1-(3-Pyrrole-1-yl-phenylimino-methyl)-naphtalen-2-ol as well as their Cu(II) complexes, have been synthesized and characterized by means of common spectroscopic analysis methods such as FTIR, UV-Vis, 1 H NMR, 13 C NMR, GC-MS and thermogravimetric analysis (TGA). The complexes, along with their metallic centres, were electropolymerized by the cyclic voltammetry method on platinum (Pt) and indium tin oxide (ITO) substrates, so that new and original modified electrodes (MEs) could be obtained, i.e. ME Poly(L i-Cu)Pt and ME Poly (L i-Cu)ITO (i=1-3). MEs obtained on ITO were characterized by FTIR spectroscopy and their morphology was investigated using scanning electron microscopy (SEM) and elemental composition by EDX analysis. The catalytic activity of these modified electrodes was successfully evaluated using electroreduction reactions in aqueous media of organic substrates. The efficiently of acetophenone reduction was significantly improved by increasing the quantity of added substrate. The value of cathodic current intensity ipc goes up from 7 to 42μA for substrate volume values varying from 0 to 40 μL, respectively. In addition, a significant increase of current values from-70μA to 175μA was observed in the presence of a saturated solution of CO 2 .

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A glassy carbon electrode modified with an iron N4-macrocycle and reduced graphene oxide for voltammetric sensing of dissolved oxygen

Cited by 18 publications

References 32 publications

Review of Dissolved Oxygen Detection Technology: From Laboratory Analysis to Online Intelligent Detection

Review of Dissolved Oxygen Detection Technology: From Laboratory Analysis to Online Intelligent Detection

Microporous N,P‐Codoped Graphitic Nanosheets as an Efficient Electrocatalyst for Oxygen Reduction in Whole pH Range for Energy Conversion and Biosensing Dissolved Oxygen

Elaboration of new modified electrodes (MEs) by electropolymerization of Cu(II)-Schiff base complexes bearing pyrrole moieties: Application in electroreduction of acetophenone and carbon dioxide

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