Facile preparation of a cellulose microfibers–exfoliated graphite composite: a robust sensor for determining dopamine in biological samples

Palanisamy, Selvakumar; Pan, Yifan; Chen, Shen‐Ming; Velusamy, Vijayalakshmi; Hall, James M.

doi:10.1007/s10570-017-1425-4

Cited by 11 publications

(3 citation statements)

References 38 publications

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“…3B. The Raman spectrum GR shows the two distinct characteristic peaks in 1580 and 2721 cm À1 , is resulting from the presence of G and 2D band of graphene [34,35]. The G/2D intensity ratio was 0.9, which shows the utilized GR contain few-layered GR, which is consistent with our previous report [36].…”

Section: Characterization Of Gr-b-cd/cuo Nps Compositesupporting

confidence: 90%

Novel electrochemical synthesis of copper oxide nanoparticles decorated graphene-β-cyclodextrin composite for trace-level detection of antibiotic drug metronidazole

Velusamy

Palanisamy

Kokulnathan

et al. 2018

Journal of Colloid and Interface Science

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Over the past decades, the synthesis of inorganic and organic nanocomposites has received much attention in the range of fields including electroanalysis of organic chemicals. In this regard, we have prepared copper oxide nanoparticle (CuO NPs) decorated graphene/β-cyclodextrin (GR-β-CD) composites using a simple electrochemical methodology, where the CuO NPs are electrodeposited on GR-β-CD composite modified electrodes. A stable GR-β-CD composite was prepared by sonication of GR in β-CD aqueous solution. As-prepared GR-β-CD/CuO NPs composites were characterized by the high-resolution scanning electron microscopy, X-ray diffraction, and Raman spectroscopy. Cyclic voltammetry results reveal that the GR-β-CD/CuO NPs composite modified electrode exhibits an excellent catalytic activity and lower reduction potential towards the electrochemical detection of metronidazole (MTZ) over other modified electrodes including GR, GR-β-CD, and CuO NPs. Under optimized conditions, amperometry was used for the determination of MTZ using GR-β-CD/CuO NPs composite modified electrodes. The response of MTZ using the composite electrodes was linear over the range from 0.002 to 210.0 µM. This sensor showed the lowest limit of detection of 0.6 nM and was much lower than the previously reported MTZ sensors. In addition, the sensor is highly sensitive, selective and durable in the presence of a range of potentially interfering electroactive compounds.

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Section: Characterization Of Gr-b-cd/cuo Nps Compositesupporting

confidence: 90%

Novel electrochemical synthesis of copper oxide nanoparticles decorated graphene-β-cyclodextrin composite for trace-level detection of antibiotic drug metronidazole

Velusamy

Palanisamy

Kokulnathan

et al. 2018

Journal of Colloid and Interface Science

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“…Table illustrates a comparison for the determination of DA at Au/NF/CD/AuNPs with other modified electrodes mentioned in the literature. ,− Reasonable sensitivity, linear concentration range, and lower DL were the achievements of the proposed electrode.…”

Section: Resultsmentioning

confidence: 99%

Novel Design of a Layered Electrochemical Dopamine Sensor in Real Samples Based on Gold Nanoparticles/β-Cyclodextrin/Nafion-Modified Gold Electrode

Atta

El-Said

2019

ACS Omega

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Change in the level of dopamine (DA) concentration in the human body causes critical diseases such as schizophrenia and Parkinson’s disease. Therefore, the determination of DA concentration and monitoring its level in human body fluids is of great importance. An electrochemical sensor based on modification of the gold electrode surface with Nafion (NF), β-cyclodextrin (CD), and gold nanoparticles (AuNPs) was fabricated for the determination of DA in biological fluids. Combined impact of all the modifiers enhances the catalytic activity of the sensor. Gold nanoparticles increase the surface area of the sensor and enhance the electron transfer rate. CD plays a main role in enhancing the accumulation of protonated DA and forming stable complexes via electrostatic interactions and hydrogen bond formation. In addition, extra preconcentration of positively charged DA is achieved through ionic selectivity of NF. High electrocatalytic activity was achieved using the modified sensor for determination of DA in real urine samples in a wide concentration range, 0.05–280 μM with a low detection limit of 0.6 nM in the small linear dynamic range, 0.05–20 μM. Furthermore, common overlapped oxidation peaks of DA in presence of biologically interfering compounds at the gold electrode were resolved by using the modified sensor. Excellent recovery results were obtained using the proposed method for determination of DA in real urine samples.

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“…Copper-based materials are used as electrodes for the biosensing of dopamine biomolecules . Also, cellulose-graphene oxide composites are used to determine dopamine in biological samples. , Developing such exotic materials from e-waste is advantageous from economic and environmental perspectives.…”

Section: Introductionmentioning

confidence: 99%

Copper Recovery from Mobile Phone Printed Circuit Board E-Waste and Transforming into CuO@C for Electrode Material in Extended Gate Field-Effect Transistors Facilitating Non-Enzymatic Ascorbic Acid Detection

Mathaiyan,

Shabanur Matada,

Sivalingam

et al. 2024

ACS Sustainable Chem. Eng.

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This study presents a new approach for the simultaneous leaching and sorption of Cu(II) from waste printed circuit board (PCB) flakes using phosphorylated cellulose (P(O)-cellulose). The leaching-sorption experiments were conducted at various temperatures (25, 45, and 60 °C) and pH values (4, 7, and 10). Phosphorylated cellulose successfully facilitated the recovery of Cu(II) under optimal conditions identified at pH 7 and 60 °C, achieving a recovery efficiency of 35.9 mg/g. Further, the recovered Cu(II)-P(O)-cellulose was treated with glycine to form copper-glycinate for quantification. Cu(II)-P(O)-cellulose was then used to synthesize Cu/CuO and CuO nanoparticles supported on carbon (Cu/CuO@C and CuO@C) through calcination at 400 and 700 °C, respectively. The synthesized CuO@ C material exhibited remarkable performance as an electrode for ascorbic acid biosensing via the EGFET configuration. The dynamic study demonstrated its superior response to ascorbic acid in the concentration range of 20−2300 μM, with a response time of less than 6 s in 1× PBS, which mimics the physiological condition of body fluids. The CuO@C electrode displayed high sensitivity (821.94 μA•dec −1 •cm −2 ) with a low detection limit of 0.047 μM, showcasing its potential for sensitive and selective ascorbic acid detection. Utilizing a sustainable cellulose functionalized derivative, copper was extracted from e-waste PCBs and repurposed for biosensing applications.

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Facile preparation of a cellulose microfibers–exfoliated graphite composite: a robust sensor for determining dopamine in biological samples

Cited by 11 publications

References 38 publications

Novel electrochemical synthesis of copper oxide nanoparticles decorated graphene-β-cyclodextrin composite for trace-level detection of antibiotic drug metronidazole

Novel electrochemical synthesis of copper oxide nanoparticles decorated graphene-β-cyclodextrin composite for trace-level detection of antibiotic drug metronidazole

Novel Design of a Layered Electrochemical Dopamine Sensor in Real Samples Based on Gold Nanoparticles/β-Cyclodextrin/Nafion-Modified Gold Electrode

Copper Recovery from Mobile Phone Printed Circuit Board E-Waste and Transforming into CuO@C for Electrode Material in Extended Gate Field-Effect Transistors Facilitating Non-Enzymatic Ascorbic Acid Detection

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