A Sensitive Pyrimethanil Sensor Based on Electrospun TiC/C Film

Sui, Ling; Wu, Tingting; Liu, Lijuan; Wang, Honghong; Wang, Qingqing; Hou, Haoqing; Guo, Qiaohui

doi:10.3390/s19071531

Cited by 11 publications

(7 citation statements)

References 31 publications

(32 reference statements)

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“…65 Likewise, TiC exhibits good chemical stability and electrical conductivity which results in electrochemical activity similar to that of noble metals. 36,66 Based on what has been stated above, the role of TiO 2 and TiC in the observed electrochemical activity cannot be ruled out completely.…”

Section: Discussionmentioning

confidence: 91%

“…However, the anatase phase of TiO 2 is also reported to show good electronic connectivity with the substrate and is considered an excellent electrocatalyst for electrochemical biosensing applications . Likewise, TiC exhibits good chemical stability and electrical conductivity which results in electrochemical activity similar to that of noble metals. , Based on what has been stated above, the role of TiO 2 and TiC in the observed electrochemical activity cannot be ruled out completely.…”

Section: Discussionmentioning

confidence: 95%

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Ni Drastically Modifies the Microstructure and Electrochemistry of Thin Ti and Cr Layers

Kousar,

Quliyeva,

Pande

et al. 2024

J. Phys. Chem. C

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There is a significant lack of literature addressing changes in the microstructure of different interfacial metal layer combinations employed in fabricating electrochemical sensors based on carbon nanomaterials. This research gap extends to analyzing their influence on the electrochemical performance, which, in turn, impacts the understanding of the properties of materials incorporating these layers. In this study, microstructural variations and electrochemical activity of chromium and titanium adhesion layers, in combination with nickel catalyst layers (designated as TiNi and CrNi), on silicon wafers were analyzed post annealing. Interestingly, during a brief annealing period of 5 min, TiNi developed a surface layer comprising graphitic carbon, alongside the formation of TiO 2 , TiC, and NiSi, and exhibited electrochemical activity toward both dopamine (DA) and ascorbic acid (AA). Conversely, CrNi annealed for 5 min did not show the presence of such a carbon layer and displayed no discernible electrochemical activity toward the target molecules. Only after an extended annealing time of 20 min, signs of a carbon layer appear on CrNi, displaying a moderate electrochemical activity toward DA and AA. The formation of a carbon layer on CrNi is delayed due to the presence of Ni near the surface, which disrupts the local equilibrium. Consequently, the formation of the Cr 2 O 3 barrier layer is delayed, which in turn permits carbon diffusion into the underlying Cr layer. Conversely, Ni stabilizes the β-Ti form and markedly decreases the solubility of carbon and oxygen within the TiNi system. By providing a comprehensive analysis of microstructural changes and their impact on the surface chemistry and electrochemical responses of commonly used interfacial metal layers, this paper offers invaluable insights in selecting suitable adhesion and catalyst layer combinations for carbon nanomaterial fabrication.

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Section: Discussionmentioning

confidence: 91%

Section: Discussionmentioning

confidence: 95%

Ni Drastically Modifies the Microstructure and Electrochemistry of Thin Ti and Cr Layers

Kousar,

Quliyeva,

Pande

et al. 2024

J. Phys. Chem. C

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“…Meanwhile, the parameters which related to the totally irreversible diffusion-controlled like electron transfer coefficient (α) and number of electrons transferred in this process were calculated by employing the following equations [ 28 , 29 , 30 , 31 ]:

where, v refer to the scan rate, R denotes the gas constant 8.314 J.K −1 mol −1 , F is Faraday’s constant 96500 C/mol and b is the Tafel slope resulting from the slope of graph in Figure S3 . Other parameters have their usual meaning.…”

Section: Resultsmentioning

confidence: 99%

Efficient Synthesis and Characterization of Polyaniline@Aluminium–Succinate Metal-Organic Frameworks Nanocomposite and Its Application for Zn(II) Ion Sensing

et al. 2021

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A new class of conductive metal-organic framework (MOF), polyaniline- aluminum succinate (PANI@Al-SA) nanocomposite was prepared by oxidative polymerization of aniline monomer using potassium persulfate as an oxidant. Several analytical techniques such as FTIR, FE-SEM, EDX, XRD, XPS and TGA-DTA were utilized to characterize the obtained MOFs nanocomposite. DC electrical conductivity of polymer-MOFs was determined by four probe method. A bare glassy carbon electrode (GCE) was modified by nafion/PANI@Al-SA, and examined for Zn (II) ion detection. Modified electrode showed improved efficiency by 91.9%. The modified electrode (PANI@Al-SA/nafion/GCE) exhibited good catalytic property and highly selectivity towards Zn(II) ion. A linear dynamic range of 2.8–228.6 µM was obtained with detection limit of LOD 0.59 µM and excellent sensitivity of 7.14 µA µM−1 cm−2. The designed procedure for Zn (II) ion detection in real sample exhibited good stability in terms of repeatability, reproducibility and not affected by likely interferents. Therefore, the developed procedure is promising for quantification of Zn(II) ion in real samples.

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“…Electrochemical variables such as diffusion coefficient and number of electrons responsible for electro‐oxidation of uric acid at the PDA/PPY modified GCE was evaluated using Randle‐Sevcik equation and Tafel slope given by the following equations respectively

true normali_{p} = (2.69 \times 10^{5}) An^{3 / 2} normalD^{1 / 2} Cv^{1 / 2}

true boldb = ((), boldt boldh bolde, boldT bolda boldf bolde boldl, bolds boldl boldo boldp bolde) = \frac{2.303 R T}{(1 - \propto) n F}

…”

Section: Resultsmentioning

confidence: 99%

“…The plot of potential (peak voltage) against logarithm of the scan rate exhibits a linear relationship, implies that the reactions at the PDA/PPY surface is irreversible. This reaction is controlled by the equation given below

true normalE_{p} = \frac{boldb ((), boldl boldo boldg boldv)}{2} + C o n s t a n t

…”

Section: Resultsmentioning

confidence: 99%

Enzymeless Electrocatalytic Detection of Uric Acid Using Polydopamine/Polypyrrole Copolymeric film

et al. 2020

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Uric acid is mainly produced from metabolism of purine nucleotide in human body and have several medical importance in human system. It is therefore very imperative to develop a sensitive and accurate method of its detection. This study aimed to develop uric acid biosensor based on polydopamine/polypyrole (PDA/PPY) composite decorated on glassy carbon electrode. The conductive polymer PDA/PPY was electrochemically synthesized and casted on glassy carbon electrode (GCE). The synthesized PDA/PPY was characterized by fourier transform infrared spectroscopy, field emission scanning electron microscopy, electrochemical impedance spectroscopy, energy dispersive x‐ray spectroscopy and x‐ray photoelectron spectroscopy. PDA/PPY/GCE showed good response towards uric acid with low limit of detection (0.1 μM, S/N =3), good linearity (0.5‐40 μM) and high sensitivity (2.1 μAμMcm−2). It was also found to have stable response for uric acid unaffected by common interferents. Also, when used for uric acid detection in human serum and urine, it showed a good recovery of 90–110%. The developed PDA/PPY composite is proposed as a promising biosensor for uric acid for human health protection.

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A Sensitive Pyrimethanil Sensor Based on Electrospun TiC/C Film

Cited by 11 publications

References 31 publications

Ni Drastically Modifies the Microstructure and Electrochemistry of Thin Ti and Cr Layers

Ni Drastically Modifies the Microstructure and Electrochemistry of Thin Ti and Cr Layers

Efficient Synthesis and Characterization of Polyaniline@Aluminium–Succinate Metal-Organic Frameworks Nanocomposite and Its Application for Zn(II) Ion Sensing

Enzymeless Electrocatalytic Detection of Uric Acid Using Polydopamine/Polypyrrole Copolymeric film

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