Electrochemical Oxidative Determination and Electrochemical Behavior of 4‐Nitrophenol Based on an Au Electrode Modified with Electro‐polymerized 3,5‐Diamino‐1,2,4‐triazole Film

Calam, Tuğba Tabanlıgil

doi:10.1002/elan.201900450

Cited by 42 publications

(12 citation statements)

References 62 publications

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“…On the other hand, the presence of nitrogen species resulting after DAT decomposition/reaction during the electrodeposition cannot be excluded. In fact, electro-induced polymerization of DAT and similar azoles was observed and studied on the surface of metal and carbon-based electrodes [38,39]. Likewise, the EDX mapping of DTAB electrode revealed the presence of bromine overlaid on the deposition of copper, indicating the inclusion of DTAB into the nanostructure.…”

Section: Energy-dispersive X-ray Mapping (Edx) X-ray Diffraction Analyses (Xrd) and X-ray Photoelectron Spectroscopy (Xps) Characterizatimentioning

confidence: 94%

Electrodeposited Copper Nanocatalysts for CO2 Electroreduction: Effect of Electrodeposition Conditions on Catalysts’ Morphology and Selectivity

et al. 2021

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Catalytic electroreduction of carbon dioxide represents a promising technology both to reduce CO2 emissions and to store electrical energy from discontinuous sources. In this work, electrochemical deposition of copper on to a gas-diffusion support was tested as a scalable and versatile nanosynthesis technique for the production of catalytic electrodes for CO2 electroreduction. The effect of deposition current density and additives (DAT, DTAB, PEG) on the catalysts’ structure was evaluated. The selectivity of the synthesized catalysts towards the production of CO was evaluated by analyzing the gaseous products obtained using the catalysts as cathodes in electroreduction tests. Catalyst morphology was deeply influenced by the deposition additives. Copper nanospheres, hemispherical microaggregates of nanowires, and shapeless structures were electrodeposited in the presence of dodecyltrimethylammonium bromide (DTAB), 3,5-diamino-1,2,4-triazole (DAT) and polyethylene glycol (PEG), respectively. The effect of the deposition current density on catalyst morphology was also observed and it was found to be additive-specific. DTAB nanostructured electrodes showed the highest selectivity towards CO production, probably attributable to a higher specific surface area. EDX and XPS analysis disclosed the presence of residual DAT and DTAB uniformly distributed onto the catalysts structure. No significant effects of electrodeposition current density and Cu(I)/Cu(II) ratio on the selectivity towards CO were found. In particular, DTAB and DAT electrodes yielded comparable selectivity, although they were characterized by the highest and lowest Cu(I)/Cu(II) ratio, respectively.

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Section: Energy-dispersive X-ray Mapping (Edx) X-ray Diffraction Analyses (Xrd) and X-ray Photoelectron Spectroscopy (Xps) Characterizatimentioning

confidence: 94%

Electrodeposited Copper Nanocatalysts for CO2 Electroreduction: Effect of Electrodeposition Conditions on Catalysts’ Morphology and Selectivity

et al. 2021

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“…The linear response for FTD was higher going from 50 nM to 5.0 μM and a LOD of 14 nM. A gold electrode modified with electrogenerated 3,5-diamino-1,2,4-triazole (35DT) was used for sensing 4-nitrophenol (4NP) [ 298 ]. The anodic current of the modified electrode compared to the bare one was ca.…”

Section: Electrochemical Sensors Based On Conducting Polymersmentioning

confidence: 99%

“… Differential pulse voltammetry of poly (35DT)/Au electrode without 4-nitrophenol (solid square line), a bare gold electrode with 50 mM of 4-nitrophenol (solid circle line), and poly (35DT)/Au electrode with 50 μM of 4-nitrophenol (solid line). Modified with permission from [ 298 ]. Copyright 2019 Wiley-VCH Verlag GmbbH and Co. …”

Section: Figurementioning

confidence: 99%

Electrochemical Sensors Based on Conducting Polymers for the Aqueous Detection of Biologically Relevant Molecules

et al. 2021

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Electrochemical sensors appear as low-cost, rapid, easy to use, and in situ devices for determination of diverse analytes in a liquid solution. In that context, conducting polymers are much-explored sensor building materials because of their semiconductivity, structural versatility, multiple synthetic pathways, and stability in environmental conditions. In this state-of-the-art review, synthetic processes, morphological characterization, and nanostructure formation are analyzed for relevant literature about electrochemical sensors based on conducting polymers for the determination of molecules that (i) have a fundamental role in the human body function regulation, and (ii) are considered as water emergent pollutants. Special focus is put on the different types of micro- and nanostructures generated for the polymer itself or the combination with different materials in a composite, and how the rough morphology of the conducting polymers based electrochemical sensors affect their limit of detection. Polypyrroles, polyanilines, and polythiophenes appear as the most recurrent conducting polymers for the construction of electrochemical sensors. These conducting polymers are usually built starting from bifunctional precursor monomers resulting in linear and branched polymer structures; however, opportunities for sensitivity enhancement in electrochemical sensors have been recently reported by using conjugated microporous polymers synthesized from multifunctional monomers.

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“…3 ve Eş. 4'de görüldüğü gibi Ip-v 1/2 arasındaki doğrusal ilişki, redoks sürecinin difüzyon kontrollü olduğunu doğrulamaktadır [36]. Şekil 7D'de logv-logIp grafiği verilmiştir.…”

Section: Dt-au Modifiye Elektrodun Hazırlanması (Preparation Of 35dunclassified

Elektropolimerize 3,5-Diamino-1,2,4-Triazol Film ile Modifiye Edilmiş Altın Elektrot Yüzeyinde Epinefrinin Voltametrik Tayini ve Elektrokimyasal Davranışı

Calam

2019

Gazi Üniversitesi Fen Bilimleri Dergisi Part C: Tasarım Ve Teknoloji

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In this study, 3,5-diamino-1,2,4-triazole (35DT) was deposited on the gold electrode (Au) to fabricate a new sensor and used for the determination of ephinephrine (EP). Comparing with the bare Au and modified electrode (35DT-Au), the 35DT-Au modified electrode has higher catalytic activities towards the oxidation of EP. Figure A shows that electrode modification process. Figure A. CVs of 1mM 35DT on the bare Au electrode (10 cycle) Purpose: The aim of this study to develop a new and applicable modified electrode in real samples such as drugs used for the determination of EP. Theory and Methods: Epinephrine (EP) is found in biological body fluids. If strong emotions such as fear or anger are felt, EP is released into the bloodstream and causes an increase in heart rate, blood pressure and sugar. Many physiological events are associated with EP levels in body fluid. Therefore, determination of EP concentration in pharmaceutical samples and various biological fluids is important for pharmacological research. The electrochemical behavior of EP on the 35DT-Au surface was investigated using the DPV and CV techniques and optimum conditions was determined. Results: The accuracy and precision studies for EP determination in the drug sample were expressed in values of RSD% and bias%, respectively. The bias% values for the determination of drug samples containing 5 μM and 15 μM EP were 0.4% and-4.07%, respectively; BSS% values were calculated as 0.4% and 2.72%, respectively. Conclusion: In this study, a gold electrode modified with 3,5-diamino-1,2,4-triazole was used for EP determination. It is important to develop methods for the determination of EP, since the concentration of EP in the body fluid is lower or higher than the normal level, leading to various diseases. The modified electrode showed a wide linear working range compared to the modified electrodes prepared by alternative methods in the literature. Furthermore, the preparation of this sensor is simple and fast. The proposed sensor (35DT-Au) provided accuracy, selectivity, short measuring time, ease of preparation, good accuracy and good analytical performance. This modified electrode preparation process is a simple and fast process, does not require any pretreatment, and shows satisfactory stability and reproducibility, provides a good alternative to current studies in the literature. In addition, the EP electrode was successfully applied with the modified electrode.

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Electrochemical Oxidative Determination and Electrochemical Behavior of 4‐Nitrophenol Based on an Au Electrode Modified with Electro‐polymerized 3,5‐Diamino‐1,2,4‐triazole Film

Cited by 42 publications

References 62 publications

Electrodeposited Copper Nanocatalysts for CO2 Electroreduction: Effect of Electrodeposition Conditions on Catalysts’ Morphology and Selectivity

Electrodeposited Copper Nanocatalysts for CO2 Electroreduction: Effect of Electrodeposition Conditions on Catalysts’ Morphology and Selectivity

Electrochemical Sensors Based on Conducting Polymers for the Aqueous Detection of Biologically Relevant Molecules

Elektropolimerize 3,5-Diamino-1,2,4-Triazol Film ile Modifiye Edilmiş Altın Elektrot Yüzeyinde Epinefrinin Voltametrik Tayini ve Elektrokimyasal Davranışı

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