Supported carbon-dots: A review

Mkhari, Orlette; Ntuli, Themba D.; Coville, Neil J.; Nxumalo, Edward N.; Maubane‐Nkadimeng, Manoko S.

doi:10.1016/j.jlumin.2022.119552

Cited by 14 publications

(3 citation statements)

References 118 publications

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“…As shown in Figure 6 c, when N-CDs and the Fe 3 O 4 nanoparticles were present alone, they could catalyze the oxidation of TMB by H 2 O 2 , but the absorbance of the reaction solution at 652 nm was not high, indicating low nanozyme activity. It has been proven that the introduction of an N atom to the graphitic carbon structures of CDs can enhance the peroxidase-like activity owing to the enhanced electrical properties and affinity towards substrates [ 16 , 23 , 26 ]. At the same time, the catalytic activity of Fe 3 O 4 originates from Fe 2+ on the surface of the nanoparticles, which undergoes Fenton or Fenton-like reactions, resulting in the oxidation of TMB by H 2 O 2 [ 44 ].…”

Section: Resultsmentioning

confidence: 99%

“…In addition to three-dimensional (3D) and two-dimensional (2D) carbon nanomaterials [ 20 , 21 , 22 ], zero-dimensional (0D) carbon nanomaterials including graphene quantum dots (GQDs) and carbon dots (CDs) have received widespread attention in recent years [ 18 , 23 ]. CDs usually have unique optical properties, (e.g., fluorescence or electrochemiluminescence) properties, good water solubility, low toxicity, environmental friendliness, low cost, and good biocompatibility [ 24 , 25 , 26 , 27 ]. Up to now, many synthesis methods have been developed for the synthesis of CDs including arc discharge, laser ablation, electrochemical synthesis, chemical oxidation, hydrothermal synthesis, microwave synthesis, etc.…”

Section: Introductionmentioning

confidence: 99%

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Magnetic Nanozyme Based on Loading Nitrogen-Doped Carbon Dots on Mesoporous Fe3O4 Nanoparticles for the Colorimetric Detection of Glucose

Huang

Ding

et al. 2023

Molecules

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The simple and accurate monitoring of blood glucose level is of great significance for the prevention and control of diabetes. In this work, a magnetic nanozyme was fabricated based on loading nitrogen-doped carbon dots (N-CDs) on mesoporous Fe3O4 nanoparticles for the colorimetric detection of glucose in human serum. Mesoporous Fe3O4 nanoparticles were easily synthesized using a solvothermal method, and N-CDs were then prepared in situ and loaded on the Fe3O4 nanoparticles, leading to a magnetic N-CDs/Fe3O4 nanocomposite. The N-CDs/Fe3O4 nanocomposite exhibited good peroxidase-like activity and could catalyze the oxidation of the colorless enzyme substrate 3,3′,5,5′-tetramethylbenzidine (TMB) to blue TMB oxide (ox-TMB) in the presence of hydrogen peroxide (H2O2). When the N-CDs/Fe3O4 nanozyme was combined with glucose oxidase (Gox), Gox catalyzed the oxidization of glucose, producing H2O2 and leading to the oxidation of TMB under the catalysis of the N-CDs/Fe3O4 nanozyme. Based on this mechanism, a colorimetric sensor was constructed for the sensitive detection of glucose. The linear range for glucose detection was from 1 to 180 μM, and the limit of detection (LOD) was 0.56 μM. The recovered nanozyme through magnetic separation showed good reusability. The visual detection of glucose was also realized by preparing an integrated agarose hydrogel containing the N-CDs/Fe3O4 nanozyme, glucose oxidase, and TMB. The colorimetric detection platform has an enormous potential for the convenient detection of metabolites.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Magnetic Nanozyme Based on Loading Nitrogen-Doped Carbon Dots on Mesoporous Fe3O4 Nanoparticles for the Colorimetric Detection of Glucose

Huang

Ding

et al. 2023

Molecules

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“…They have emerged as a versatile and potent platform with diverse applications [8] . C-dots have gotten a lot of attention and incredible interest in the field of nanotechnology [9], including bioimaging [10], sensing [11,12], catalysis [13], solar cells [14], long-term chemical stability, cost-effectiveness [15], excellent biocompatibility and light-emitting diodes [16], enhanced electron transferability [17], photobleaching, high photoluminescent quantum yield [18], and good aqueous solubility are all desirable characteristics [6,11,19,20]. Because of its outstanding optical properties, C-dots have been developed to replace expensive, heavy-metal-based fluorophores in some photovoltaic solar cells 2 [21].…”

Section: Introductionmentioning

confidence: 99%

Carbon Dots for Future Prospects: Synthesis, Characterizations and Recent Applications: A Review (2019–2023)

Etefa,

Tessema,

Dejene

2024

Preprint

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Nanotechnology sparks discussions and concerns about the impacts of new nanomaterials on health and the environment. It holds importance in various domains due to its unique struc-tures. Carbon dots (C-dots) are versatile nanomaterials with applications in bioimaging, sensing, catalysis, polymers, solar cells, and more. They offer desirable characteristics such as stability, cost-effectiveness, biocompatibility, and high photoluminescent quantum yield. C-dots have the potential to replace expensive fluorophores in solar cells. They are catego-rized as carbon quantum dots, graphene quantum dots, and carbonized polymer dots. C-dots have outstanding optical and photoelectric properties with low toxicity. Bottom-up and top-down approaches are used for the synthesis of carbon dots (CDs), with each method im-pacting their physicochemical characteristics. The choice of synthesis method depends on de-sired properties and application requirements. Researchers combine these methods and ex-plore new approaches to enhance synthesis efficiency and tailor CD properties. CDs have di-verse chemical structures with modified oxygen, polymer-based, or amino groups on their surface. Various characterization methods such as HRTEM, XPS, and optical analysis (PL, UV) are used to determine CD structure. Carbon dots (CDs) are cutting-edge fluorescent nano-materials with remarkable qualities such as biocompatibility, low toxicity, environmental friendliness, high water solubility, and photo-stability. They are easily adjustable in terms of their optical properties, making them highly versatile in various fields. CDs find applications in bio-imaging, nanomedicine, drug delivery, solar cells, LEDs, photo-catalysis, elec-tro-catalysis, and other related areas.

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Simultaneously Improved Curing, Mechanical, Antioxidative Properties and Reduced ZnO Loading of Silica Filled NR Composites by Incorporation of Low-cost Crude Carbon Dots via Conventional Melt-milling Method

Sun,

Ji,

et al. 2024

Chin J Polym Sci

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Supported carbon-dots: A review

Cited by 14 publications

References 118 publications

Magnetic Nanozyme Based on Loading Nitrogen-Doped Carbon Dots on Mesoporous Fe3O4 Nanoparticles for the Colorimetric Detection of Glucose

Magnetic Nanozyme Based on Loading Nitrogen-Doped Carbon Dots on Mesoporous Fe3O4 Nanoparticles for the Colorimetric Detection of Glucose

Carbon Dots for Future Prospects: Synthesis, Characterizations and Recent Applications: A Review (2019–2023)

Simultaneously Improved Curing, Mechanical, Antioxidative Properties and Reduced ZnO Loading of Silica Filled NR Composites by Incorporation of Low-cost Crude Carbon Dots via Conventional Melt-milling Method

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