Non-Enzymatic Glucose Sensing Using Carbon Quantum Dots Decorated with Copper Oxide Nanoparticles

Maaoui, Houcem; Teodoresu, Florina; Wang, Qian; Pan, Guohui; Addad, Ahmed; Chtourou, R.; Szunerits, Sabine; Boukherroub, Rabah

doi:10.3390/s16101720

Cited by 44 publications

(32 citation statements)

References 25 publications

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“…As shown in Figure 9, a response distinguishable from the background (the difference is at least three times the signal to noise ratio) can be detected at glucose concentration as low as 10 µM, representing the measured limit of detection. On this basis, our sensing system can be considered competitive with other non-enzymatic glucose sensors using the electrochemical transduction [30,31,32].…”

Section: Resultsmentioning

confidence: 99%

Phosphate Modified Screen Printed Electrodes by LIFT Treatment for Glucose Detection

et al. 2018

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The design of new materials as active layers is important for electrochemical sensor and biosensor development. Among the techniques for the modification and functionalization of electrodes, the laser induced forward transfer (LIFT) has emerged as a powerful physisorption method for the deposition of various materials (even labile materials like enzymes) that results in intimate and stable contact with target surface. In this work, Pt, Au, and glassy carbon screen printed electrodes (SPEs) treated by LIFT with phosphate buffer have been characterized by scanning electron microscopy and atomic force microscopy to reveal a flattening effect of all surfaces. The electrochemical characterization by cyclic voltammetry shows significant differences depending on the electrode material. The electroactivity of Au is reduced while that of glassy carbon and Pt is greatly enhanced. In particular, the electrochemical behavior of a phosphate LIFT treated Pt showed a marked enrichment of hydrogen adsorbed layer, suggesting an elevated electrocatalytic activity towards glucose oxidation. When Pt electrodes modified in this way were used as an effective glucose sensor, a 1–10 mM linear response and a 10 µM detection limit were obtained. A possible role of phosphate that was securely immobilized on a Pt surface, as evidenced by XPS analysis, enhancing the glucose electrooxidation is discussed.

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Section: Resultsmentioning

confidence: 99%

Phosphate Modified Screen Printed Electrodes by LIFT Treatment for Glucose Detection

et al. 2018

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“…Carbon quantum dots (CQDs) were synthesized by a one-pot method at a relatively low reaction temperature [19]. In a typical procedure, fructose (500 mM) and sodium hydroxide (500 mM) were added to 20 mL water.…”

Section: Synthesis Of Carbon Dotsmentioning

confidence: 99%

“…Copper perchlorate (1.35 g) was dissolved in 10 mL of previously prepared CQDs solution and heated at 80 °C for 3 h. The formed precipitate was separated by centrifugation, washed with water three times and annealed at 120 °C overnight [19]. For comparison, Cu2O was prepared by the same procedure using copper chloride and sodium hydroxide without adding fructose as mentioned above.…”

Section: Synthesis Of Cu2o/cqdsmentioning

confidence: 99%

“…The Cu2O/CQDs investigated in this work was prepared according to a previous protocol published by some of us [19]. The morphology of the synthesized Cu2O/CQD nanocomposite was investigated by scanning electron microscopy (SEM) and transmission electron microscopy (TEM).…”

Section: Synthesis and Characterization Of Photocatalystmentioning

confidence: 99%

“…The UV-vis absorption spectrum of CQDs in water revealed a main absorption peak at 293 and a shoulder at 340 nm attributed to the π-π* transition of the conjugated C=C and the n-π* transition of the C=O, respectively [19]. Interestingly, both Cu2O and Cu2O/CQD absorb remarkably in the visible region, making these materials suitable for photocatalytic processes under visible light irradiation.…”

Section: T H E T a (°)mentioning

confidence: 99%

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Visible light assisted oxidative coupling of benzylamines using heterostructured nanocomposite photocatalyst

Kumar

Hamdi

Coffinier

et al. 2018

Journal of Photochemistry and Photobiology A: Chemistry

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This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. Highlights of the research  Facile synthesis of hybrid nanocomposite consisting of copper (I) oxide and carbon quantum dots.  Heterogeneous photocatalyst for organic transformation  Visible light assisted oxidative coupling of benzyl amine  A green, economical and efficient photochemical approach  Higher activity and robustness of hybrid photocatalyst than neat Cu2O and CQDs.  Facile recovery and efficient recycling of the photocatalyst.

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Preparation of nanocellulose/reduced graphene oxide matrix loaded with cuprous oxide nanoparticles for efficient catalytic reduction of 4‐nitrophenol

Khili,

Omrani

2024

Biopolymers

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The paper reports on the preparation of cellulose nanocrystals/reduced graphene oxide matrix loaded with cuprous oxide nanoparticles (CNC/rGO‐Cu2O) through a simple solvothermal method and its application for 4‐nitrophenol reduction to 4‐aminophenol using sodium borohydride. The CNC/rGO‐Cu2O nanocomposite was formed chemically by first mixing CNC and graphene oxide (GO) followed by complexation of the negatively charged functional groups of CNC/GO with Cu2+ ions and subsequent heating at 100°C. This resulted in the simultaneous reduction of GO to rGO and the formation of Cu2O nanoparticles. The as‐elaborated nanocomposite was firstly characterized using different techniques such as atomic force microscopy, scanning electron microscopy, transmission electron microscopy, UV–Vis spectrophotometry, Raman spectroscopy and x‐ray photoelectron spectroscopy. Then, it was successfully applied for efficient catalytic reduction of 4‐nitrophenol to 4‐aminophenol using sodium borohydride: the reduction was completed in about 6 min. After eight times use, the catalyst still maintained good catalytic performance. Compared to CNC/rGO, rGO/Cu2O and free Cu2O nanoparticles, the CNC/rGO‐Cu2O nanocomposite exhibits higher catalytic activity even at lower copper loading.

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Non-Enzymatic Glucose Sensing Using Carbon Quantum Dots Decorated with Copper Oxide Nanoparticles

Cited by 44 publications

References 25 publications

Phosphate Modified Screen Printed Electrodes by LIFT Treatment for Glucose Detection

Phosphate Modified Screen Printed Electrodes by LIFT Treatment for Glucose Detection

Visible light assisted oxidative coupling of benzylamines using heterostructured nanocomposite photocatalyst

Preparation of nanocellulose/reduced graphene oxide matrix loaded with cuprous oxide nanoparticles for efficient catalytic reduction of 4‐nitrophenol

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