Cobalt-doped cerium oxide nanocrystals shelled 1D SnO2 structures for highly sensitive and selective xanthine detection in biofluids

Malhotra, Deepanshu; Tran, Phan Khanh Linh; Tran, Duy Thanh; Kim, Nam Hoon

doi:10.1016/j.jcis.2021.05.024

Cited by 13 publications

(7 citation statements)

References 59 publications

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“…Replacing the acquired slope value (0.0255) into the linear equation, the values of n and α are calculated to be: α xan = 0.503, n xan = 2.02. From this result and combining it with the result of the buffer pH experiment, it was shown that the electrooxidation reaction of xanthine on the surface of the VS 4 @N-BPC electrode conformed to the two-electron and two-proton transfer process, and the reaction mechanism was speculated to be: 60,64 …”

Section: Resultsmentioning

confidence: 80%

Self-assembly encapsulation of vanadium tetrasulfide into nitrogen doped biomass-derived porous carbon as a high performance electrochemical sensor for xanthine determination

Zhu

Xin

2022

New J. Chem.

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Section: Resultsmentioning

confidence: 80%

Self-assembly encapsulation of vanadium tetrasulfide into nitrogen doped biomass-derived porous carbon as a high performance electrochemical sensor for xanthine determination

Zhu

Xin

2022

New J. Chem.

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“…However, these biosensors show a higher limit of detection, and the linear range may be due to slow electron transfer, poor stability, reusability, fragility, and poor absorption ability, which created requirement for introducing a system with a highly desirable lower detection limit and fast electron transfer. Even, most of the electrochemical biosensors reported for Xn detection usually involve active metal catalysts to provide a higher surface functionality for immobilizing enzymes, increased electroactive surface, and improved charge transfer efficiency …”

Section: Introductionmentioning

confidence: 99%

“…Even, most of the electrochemical biosensors reported for Xn detection usually involve active metal catalysts to provide a higher surface functionality for immobilizing enzymes, increased electroactive surface, and improved charge transfer efficiency. 28 Herein, efforts have been made to fabricate a metal-free biosensor based on PoPD@g-C 3 N 4 nanocomposites, synthesized using a simple oxidative polymerization method. To the best of our knowledge, PoPD@g-C 3 N 4 nanocomposite-based biosensors have never been used for Xn detection.…”

Section: Introductionmentioning

confidence: 99%

Graphitic Carbon Nitride-Wrapped Metal-free PoPD-Based Biosensor for Xanthine Detection

2022

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A metal-free, enzymatic biosensor was developed using graphitic carbon nitride (g-C3N4)-wrapped poly-ortho-phenylenediamine (PoPD) for the determination of xanthine (Xn). Field emission scanning electron microscopy, Fourier transform infrared spectroscopy, and X-ray diffraction confirmed the successful formation of the PoPD, g-C3N4 nanosheets and PoPD@g-C3N4 nanocomposite. Furthermore, the electrochemical behavior of the biosensor was characterized by cyclic voltammetry and electrochemical impedance spectroscopy. The prepared enzyme electrode exhibited maximum response at pH 7.5 with a response time of 5 s, and its sensitivity was 5.798 μAM–1. The nanocomposite shows exceptional sensing capabilities for detecting Xn, having a wide linear range from 1 nM to 1 μM with a relatively low detection limit of 0.001 nM. The biosensor shows good stability (4 weeks) and reproducibility and can detect the presence of Xn from other interfering analytes. Validation of the biosensor with real samples obtained from Rohu (Labeo rohita) fish shows that the fabricated biosensor has the requisite potential to be used for Xn detection in meat samples.

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“…Although the rare-earth metals are attractive candidates as dopants, a reduction in the availability coupled with demand has led to increased prices for these compounds. Consequently, other metals such as zinc (Zn), cobalt (Co), bismuth (Bi), and copper (Cu) were studied as an alternative dopant. Among these, the copper ions (Cu 2+ or Cu + ) cause specific changes in the crystal lattice structure, mainly because of the Jahn–Teller effect .…”

Section: Introductionmentioning

confidence: 99%

Rietveld Refinement, Morphology, and Optical and Photoluminescence Properties of a β-Ag_1.94Cu_0.06MoO₄ Solid Solution

et al. 2022

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Corner-truncated cubic β-Ag 1.94 Cu 0.06 MoO 4 microcrystals were synthesized using the hydrothermal method. These were investigated by X-ray diffraction, confirming obtention of the spinel structure Fd3̅ m. Through Raman spectroscopy are confirmed all modes for the point group of O h 7. The E gap shows a decrease of the band gap from 3.20 to 3.07 eV, with reduction of the conduction band occurring from −0.20 eV (β-Ag 2 MoO 4 ) to −0.13 eV (β-Ag 1.94 Cu 0.06 MoO 4 ), suggesting a p-type behavior for the Cu 2+ ion. The fieldemission scanning electron microscopy images confirm the morphological changes for β-Ag 2 MoO 4 , where potato-like microcrystals were found. Meanwhile, corner-truncated cubic microcrystals for β-Ag 1.94 Cu 0.06 MoO 4 . The photoluminescence (PL) spectrum confirms the increase in the PL emission for β-Ag 1.94 Cu 0.06 MoO 4 , with suppression of the deep defects occurring in the structure caused by oxygen and silver atoms. In contrast, the green region is intensified because of distortions of the Ag−O and Mo−O bonds. Therefore, the β-Ag 1.94 Cu 0.06 MoO 4 solid solution has PL emission with CCT (4510 K) and CIE coordinates (x = 0.372 and y = 0.433), which could be interesting properties for applications as light-emitting diodes.

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Cobalt-doped cerium oxide nanocrystals shelled 1D SnO2 structures for highly sensitive and selective xanthine detection in biofluids

Cited by 13 publications

References 59 publications

Self-assembly encapsulation of vanadium tetrasulfide into nitrogen doped biomass-derived porous carbon as a high performance electrochemical sensor for xanthine determination

Self-assembly encapsulation of vanadium tetrasulfide into nitrogen doped biomass-derived porous carbon as a high performance electrochemical sensor for xanthine determination

Graphitic Carbon Nitride-Wrapped Metal-free PoPD-Based Biosensor for Xanthine Detection

Rietveld Refinement, Morphology, and Optical and Photoluminescence Properties of a β-Ag_1.94Cu_0.06MoO₄ Solid Solution

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Cobalt-doped cerium oxide nanocrystals shelled 1D SnO2 structures for highly sensitive and selective xanthine detection in biofluids

Cited by 13 publications

References 59 publications

Self-assembly encapsulation of vanadium tetrasulfide into nitrogen doped biomass-derived porous carbon as a high performance electrochemical sensor for xanthine determination

Self-assembly encapsulation of vanadium tetrasulfide into nitrogen doped biomass-derived porous carbon as a high performance electrochemical sensor for xanthine determination

Graphitic Carbon Nitride-Wrapped Metal-free PoPD-Based Biosensor for Xanthine Detection

Rietveld Refinement, Morphology, and Optical and Photoluminescence Properties of a β-Ag1.94Cu0.06MoO4 Solid Solution

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Product

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Rietveld Refinement, Morphology, and Optical and Photoluminescence Properties of a β-Ag_1.94Cu_0.06MoO₄ Solid Solution