Quantum dots@porous carbon platform for the electrochemical sensing of oxytetracycline

Lin, Jinyu; Qian, Junchao; Wang, Yaping; Yang, Yue; Zhang, Yuxuan; Chen, Jianping; Chen, Xingwang; Chen, Zhigang

doi:10.1016/j.microc.2021.106341

Cited by 16 publications

(6 citation statements)

References 32 publications

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“…The peak current of OTC reaches a maximum value of 11.6 × 10 − 4 A at pH = 7.2, optimal pH value for detecting OTC. Its electrochemical behavior is similar to that of Lin et al (2021).…”

Section: Electrochemical Surface Area and Effect Of Ph Valuementioning

confidence: 67%

“…From Fig. 1c, it can be seen that the quantum dots have been successfully synthesized and dispersed well (Lin et al 2021).…”

Section: Physicochemical Characterizationmentioning

confidence: 81%

“…This research aims to prepare an electrochemical sensor for the electrochemical detection of OTC in water samples. To this end, CeO 2 -Co 3 O 4 quantum dots (CeO 2 -Co 3 O 4 QDs) composites were synthesized using SB as a template for modifying electrodes, and the PC gave them higher mono dispersity, Ce 3+ /Ce 4+ redox cycling ability, and more oxygen vacancies (Lin et al 2021). In addition, MWCNTs were loaded on the surface of the modi ed Graphite Electrode (GE) to improve the conductivity of the electrode and increase the electron transfer ability between the target molecule and the electrode surface (Bölükbaşı et al 2022).…”

Section: Introductionmentioning

confidence: 99%

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Electrochemical Detection of Oxytetracycline employing Sugarcane Carbon modified Graphite Electrode

Jiang

Rani

Nguyen

et al. 2023

Preprint

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Oxytetracycline (OTC) is an antibiotic and belongs to contaminants of emerging concern seriously impacting human health, which makes necessary to develop a simple, fast, sensitive, and low-cost detection technology to detect OTC in the environment, and electrochemical sensors have these advantages. This study used CeO2-Co3O4 quantum dots@porous carbon/multi-walled carbon nanotube (CeO2-Co3O4 QDs@PC/MWCNT/GE) composites to modify graphite electrodes to fabricate high-sensitivity electrochemical sensors. The quantum dots were made from waste sugarcane-bagasse. In order to evaluate its performance, scanning electron microscopy, energy-dispersive X-ray spectroscopy, Fourier-transform infrared spectroscopy, X-ray diffractometer, Raman spectroscopy, cyclic & differential pulse voltammograms, electrochemical impedance spectroscopy, and other instrumental analysis were performed. The results showed that the CeO2-Co3O4 QDs@PC/MWCNT/GE had excellent performance for OTC detection, and its linear calibration range was 1.007 × 10-8 M to 2.04 × 10-7 M (i.e., 0.005 – 0.1 ppm) and 1.007 × 10-6 M to 1.209 × 10-4 M (i.e., 0.5 – 60 ppm). The limit of detection and limit of quantification were 1.23 nM (0.61 ppb) and 4.09 nM (2.03 ppb) (S/N = 3), respectively. This method provides a new way to prepare electrochemical sensors for OTC detection.

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“…The peak current of OTC reaches a maximum value of 11.6 × 10 − 4 A at pH = 7.2, optimal pH value for detecting OTC. Its electrochemical behavior is similar to that of Lin et al (2021).…”

Section: Electrochemical Surface Area and Effect Of Ph Valuementioning

confidence: 67%

“…From Fig. 1c, it can be seen that the quantum dots have been successfully synthesized and dispersed well (Lin et al 2021).…”

Section: Physicochemical Characterizationmentioning

confidence: 81%

Section: Introductionmentioning

confidence: 99%

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Electrochemical Detection of Oxytetracycline employing Sugarcane Carbon modified Graphite Electrode

Jiang

Rani

Nguyen

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…Quantum dot-based electrodes could be used to enhance the sensitivity of aflatoxin B1—a toxin produced by fungus occurring in food, i.e., grains, peanuts, maize, and groundnuts—detection in maize samples with a detection limit of 0.09 ng/mL [ 197 ]. The quantum dots@porous carbon platform for the electrochemical detection of oxytetracycline—an antibiotic—was developed by Lin et al with the limit of detection of 3.23 × 10 −9 mol/L [ 198 ]. Recently, the electrochemical analysis system-based nanostructure was concerned with the detection of organic molecules in foods.…”

Section: Nanotechnology In Food Monitoringmentioning

confidence: 99%

Recent Progress in Nanotechnology-Based Approaches for Food Monitoring

et al. 2022

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Throughout the food supply chain, including production, storage, and distribution, food can be contaminated by harmful chemicals and microorganisms, resulting in a severe threat to human health. In recent years, the rapid advancement and development of nanotechnology proposed revolutionary solutions to solve several problems in scientific and industrial areas, including food monitoring. Nanotechnology can be incorporated into chemical and biological sensors to improve analytical performance, such as response time, sensitivity, selectivity, reliability, and accuracy. Based on the characteristics of the contaminants and the detection methods, nanotechnology can be applied in different ways in order to improve conventional techniques. Nanomaterials such as nanoparticles, nanorods, nanosheets, nanocomposites, nanotubes, and nanowires provide various functions for the immobilization and labeling of contaminants in electrochemical and optical detection. This review summarizes the recent advances in nanotechnology for detecting chemical and biological contaminations in the food supply chain.

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“…Porous carbon sheets have been utilized to support graphene QDs, CeO 2 and Co 3 O 4 QDs for detecting trace amounts of chemicals and biochemicals. [11,12] In addition to QDs, porous carbon has been used for hosting Pt, [10] Cu, [9] and Fe nanoparticles [8] aimed at sensing cholesterol, glucose, and dopamine, respectively. Porous carbons can also be co-doped with heteroatoms (e.g., Co, N) to enhance its electrical conductivity and sensitivity toward an analyte.…”

Section: Introductionmentioning

confidence: 99%

Laser‐Patterned Carbon‐Supported Graphitic Carbon Nitride Quantum Dots for Flexible Nanozyme‐Based Fluoride Sensor

Devi

Raut

Sharma

2023

Part & Part Syst Charact

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Graphitic carbon nitride quantum dots (g‐CNQDs)‐based colorimetric sensors are typically solution‐based and hence incompatible with wearable electronics. Today's competitive technology demands safe and reliable, high‐performance sensors suitable for integration with sophisticated electronics—all at a low cost. Herein, a flexible and reusable solid‐state fluoride ion sensor manufactured by combining the intriguing surface properties of laser‐patterned carbon (LP‐C) with the sensitivity of g‐CNQDs is reported. LP‐C is obtained by direct IR‐laser writing onto polyimide films, and g‐CNQDs are synthesized via a solvent‐free and zero‐waste green process. The hybrid of LP‐C and g‐CNQDs (g‐CNQDs/LP‐C), mimics the natural enzyme horseradish peroxidase and oxidizes the chromogenic substrate 3,3’,5,5’‐tetramethylbenzidine in the presence of H2O2 in acidic media. The highly selective and user‐friendly nanozyme sensors feature a lower limit of detection of 0.568 ± 0.006 × 10−6 m (23.8 ± 1.5 µg L−1) with linearity in the range of 0.5 × 10−6 to 100 × 10−6 m. A sensing mechanism based on the electronic transitions of g‐CNQDs and LP‐C, the two variants of nitrogen‐containing carbon used in this work, is established. Finally, the device is tested for fluoride ion sensing in natural water samples collected from the Uhl river in Mandi, India.

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Quantum dots@porous carbon platform for the electrochemical sensing of oxytetracycline

Cited by 16 publications

References 32 publications

Electrochemical Detection of Oxytetracycline employing Sugarcane Carbon modified Graphite Electrode

Electrochemical Detection of Oxytetracycline employing Sugarcane Carbon modified Graphite Electrode

Recent Progress in Nanotechnology-Based Approaches for Food Monitoring

Laser‐Patterned Carbon‐Supported Graphitic Carbon Nitride Quantum Dots for Flexible Nanozyme‐Based Fluoride Sensor

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