Nitrogen-Doped Graphdiyne Quantum-dots as an Optical-Electrochemical sensor for sensitive detection of dopamine

Bai, Qiang; Luo, Hongyang; Yi, Xu; Shi, Shugao; Wang, Lina; Liu, Manhong; Du, Fanglin; Yang, Zhugen; Sui, Ning

doi:10.1016/j.microc.2022.107521

Cited by 18 publications

(10 citation statements)

References 46 publications

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“…Additionally, due to the increased electrical conductivity brought about by doping with N, N-GDQDs experienced strong electron transfer and good electrical conductivity, which made it easier for electron transfer from N-GDQDs. 87 Besides N-GDQDs, Kumar demonstrated that metal-free P-doped g-C 3 N 4 QDs (P-CNQDs)/TiO 2 photocatalysts could be used as effective catalysts for the H 2 production. P-CNQDs/TiO 2 structures enhance charge separation and electron transfer, resulting in significantly improved photocatalytic efficiency (Fig.…”

Section: Gqdsmentioning

confidence: 99%

Emerging carbon-based quantum dots for sustainable photocatalysis

Wang

Jiang

et al. 2023

Green Chem.

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Section: Gqdsmentioning

confidence: 99%

Emerging carbon-based quantum dots for sustainable photocatalysis

Wang

Jiang

et al. 2023

Green Chem.

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“…The unique structure endows GDY with fascinating properties, such as highly conjugated π-electronic structures, abundant chemical bonds, highly carrier mobility, and stability . Plenty of well-defined GDY nanostructures including 0D nanoparticles, 1D nanowires, 2D nanosheets, and 3D structures were reported . These GDY structures were used as electrode materials in versatile electrochemical sensing.…”

Section: Introductionmentioning

confidence: 99%

Ultrathin Graphdiyne/Graphene Heterostructure as a Robust Electrochemical Sensing Platform

Sun

Duan

et al. 2022

Anal. Chem.

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Graphdiyne (GDY) has been considered as an appealing electrode material for electrochemical sensing because of its alkyne-rich structure and high degrees of π-conjugation, which shows great affinity to heavy metal ions and pollutant molecules via d−π and π–π interactions. However, the low surface area and poor conductivity of bulk GDY limit its electrochemical performance. Herein, a two-dimensional ultrathin GDY/graphene (GDY/G) nanostructure was synthesized and used as an electrode material for electrochemical sensing. Graphene plays the role of an epitaxy template for few-layered GDY growth and conductive layers. The formed few-layered GDY with a high surface area possesses abundant affinity sites toward heavy metal ions (Cd2+, Pb2+) and toxic molecules, for example, nitrobenzene and 4-nitrophenol, via d−π and π–π interactions, respectively. Moreover, hemin as a key part of the enzyme catalytic motif was immobilized on GDY/G via π–π interactions. The artificial enzyme mimic hemin/GDY/G-modified electrode exhibited promising ascorbic acid and uric acid detection performance with excellent sensitivity and selectivity, a good linear range, and reproducibility. More importantly, real sample detection and the feasibility of this electrochemical sensor as a wearable biosensor were demonstrated.

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“…16 Bai et al reported on the synthesis of nitrogendoped GDY QDs through the hydrothermal process and applied them for fluorescence-and electrochemical-based dopamine detection. 17 based QDs could help to overcome the low stability of natural enzymes and cytotoxicity concerns with cadmium-based QDs. 18−21 H 2 O 2 and dopamine are neurotransmitters present in the human body that play different roles in cellular signaling.…”

Section: Introductionmentioning

confidence: 99%

Graphdiyne Quantum Dots for H₂O₂ and Dopamine Detection

Ahmed

Cardoso

Cobas

et al. 2023

ACS Appl. Nano Mater.

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The fluorescence and nanozymatic nature of quantum dots (QDs) in a single entity provide an excellent opportunity for the development of sensitive fluorescence and colorimetric biosensing and bioimaging approaches. Herein, the hydrothermal synthesis method of fluorescent graphdiyne quantum dots (GDY QDs) from graphdiyne sheets is presented. This research reports, for the first time, the nanozymatic activity of GDY QDs besides their conventional fluorescent nature, which catalyzes the oxidation of H 2 O 2 through the peroxidase biomimetic nature and enables detection of H 2 O 2 and dopamine. The peaks of the ultraviolet−visible (UV−vis) spectrum and the fluorescence emission of GDY QDs are located at 395 and 450 nm, respectively. The X-ray photoelectron spectroscopic (XPS) results reveal that GDY and GDY QDs have similar carbon skeletons. Moreover, the intensity of C−O and C�O peaks in GDY QDs is stronger than that of GDY, suggesting the successful surface oxidation of GDY, which is crucial for hydrophilicity and catalytic activity. Kinetic analysis reveals that as-synthesized GDY QDs exhibit Michaelis−Menten kinetic behavior. The terephthalic acid and DPPH test confirms the hydroxyl radical formation and scavenging nature of GDY QDs, playing a significant role in enhancing the nanozymatic activity. The biomimetic nature of GDY QDs is applied for H 2 O 2 and dopamine detection, and limit of detection (LOD) values of 0.13 and 8.65 μM are obtained for H 2 O 2 and dopamine, respectively. The findings of this study will open a door to the development of carbon-based nanocrystals with an enzyme-mimicking nature that can lead to the development of analytical approaches, in particular, colorimetric nanobiosensors.

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Nitrogen-Doped Graphdiyne Quantum-dots as an Optical-Electrochemical sensor for sensitive detection of dopamine

Cited by 18 publications

References 46 publications

Emerging carbon-based quantum dots for sustainable photocatalysis

Emerging carbon-based quantum dots for sustainable photocatalysis

Ultrathin Graphdiyne/Graphene Heterostructure as a Robust Electrochemical Sensing Platform

Graphdiyne Quantum Dots for H₂O₂ and Dopamine Detection

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Nitrogen-Doped Graphdiyne Quantum-dots as an Optical-Electrochemical sensor for sensitive detection of dopamine

Cited by 18 publications

References 46 publications

Emerging carbon-based quantum dots for sustainable photocatalysis

Emerging carbon-based quantum dots for sustainable photocatalysis

Ultrathin Graphdiyne/Graphene Heterostructure as a Robust Electrochemical Sensing Platform

Graphdiyne Quantum Dots for H2O2 and Dopamine Detection

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Product

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Graphdiyne Quantum Dots for H₂O₂ and Dopamine Detection