Enhanced antibiotic degradation performance of Cd0.5Zn0.5S/Bi2MoO6 S-scheme photocatalyst by carbon dot modification

Journal of Material Science and Technology, Journal Year: 2023, Volume and Issue: 164, P. 59 - 67

Published: June 7, 2023

Language: Английский

---

Properties, synthesis, and applications of carbon dots: A review

Carbon Trends, Journal Year: 2023, Volume and Issue: 12, P. 100276 - 100276

Published: June 8, 2023

Carbon dots (CDs) refer to a class of carbon-based nanoparticles with various subgroups based on their crystallinity and morphology. CDs offer tuneable physical, chemical, optical properties, which can be controlled using simple one-pot synthesis techniques. In addition, non-toxicity, biocompatibility, chemical physical responsiveness, resistance photo- chemical-bleaching low cost pave the way wide range applications. The achieved via two approaches: (i) top-down methods, (ii) bottom-up methods. These approaches designed generate intended structures specific band gap, hetero-atom doping, functionality. Further ongoing research enables us understand relationship between structural properties CDs. photoluminescence depends parameters including starting materials, surface states, heteroatom doping etc. Herein, we review such as optical, resulting from particles design. Also, proposed applications biomedicine, light emitting diodes, anticounterfeiting, sensing are presented, where main challenges in strategies overcome these introduced.

Language: Английский

---

Carbon dots: mysterious past, vibrant present, and expansive future

Trends in Chemistry, Journal Year: 2022, Volume and Issue: 5(1), P. 76 - 87

Published: Nov. 10, 2022

Language: Английский

---

Formation and fluorescent mechanism of red emissive carbon dots from o-phenylenediamine and catechol system

Light Science & Applications, Journal Year: 2022, Volume and Issue: 11(1)

Published: Oct. 13, 2022

Carbon dots (CDs) as the advancing fluorescent carbon nanomaterial have superior potential and prospective. However, ambiguous photoluminescence (PL) mechanism intricate structure-function relationship become greatest hindrances in development applications of CDs. Herein, red emissive CDs were synthesized high yield from o-phenylenediamine (oPD) catechol (CAT). The PL is considered molecular state fluorophores because 5,14-dihydroquinoxalino[2,3-b] phenazine (DHQP) separated exhibits same properties behavior These include peak position shape emission excitation dependence on pH solvent polarity. Both them display close lifetime decays. Based these, we deduce that DHQP fluorophore similar to DHQP. During CDs, electron molecule can transfer formation process further confirmed by reaction intermediates (phthalazine, dimers) oPD. findings provide insights into this type may guide tunable for tailored properties.

Language: Английский

---

Copper Doped Carbon Dots for Addressing Bacterial Biofilm Formation, Wound Infection, and Tooth Staining

ACS Nano, Journal Year: 2022, Volume and Issue: 16(6), P. 9479 - 9497

Published: June 17, 2022

Oral infectious diseases and tooth staining, the main challenges of dental healthcare, are inextricably linked to microbial colonization formation pathogenic biofilms. However, dentistry has so far still lacked simple, safe, universal prophylactic options therapy. Here, we report copper-doped carbon dots (Cu-CDs) that display enhanced catalytic (catalase-like, peroxidase-like) activity in oral environment for inhibiting initial bacteria (Streptococcus mutans) adhesion subsequent biofilm eradication without impacting surrounding tissues via oxygen (O2) reactive species (ROS) generation. Especially, Cu-CDs exhibit strong affinity lipopolysaccharides (LPS) peptidoglycans (PGN), thus conferring them with excellent antibacterial ability against Gram-positive (Staphylococcus aureus) Gram-negative (Escherichia coli), such they can prevent wound purulent infection promoting rapid healing. Additionally, Cu-CDs/H2O2 system shows a better performance whitening, compared results obtained other alternatives, e.g., CDs clinically used H2O2, particularly its negligible enamel dentin destruction. It is anticipated biocompatible presented this work promising nano-mouthwash eliminating biofilms, prompting healing as well highlighting their significance health management.

Language: Английский

---

Zero-Dimensional Carbon Nanomaterials for Fluorescent Sensing and Imaging

Chemical Reviews, Journal Year: 2023, Volume and Issue: 123(18), P. 11047 - 11136

Published: Sept. 7, 2023

Advances in nanotechnology and nanomaterials have attracted considerable interest play key roles scientific innovations diverse fields. In particular, increased attention has been focused on carbon-based exhibiting extended structures unique properties. Among these materials, zero-dimensional structures, including fullerenes, carbon nano-onions, nanodiamonds, dots, possess excellent bioaffinities superior fluorescence properties that make suitable for application to environmental biological sensing, imaging, therapeutics. This review provides a systematic overview of the classification structural properties, design principles preparation methods, optical sensing applications nanomaterials. Recent interesting breakthroughs sensitive selective imaging heavy metal pollutants, hazardous substances, bioactive molecules as well information encryption, super-resolution photoacoustic phototherapy nanomedicine delivery are main focus this review. Finally, future challenges prospects materials highlighted envisaged. presents comprehensive basis directions designing, developing, applying fascinating fluorescent sensors fabricated based specific requirements numerous research

Language: Английский

---

Carbon quantum dots-modified tetra (4-carboxyphenyl) porphyrin/BiOBr S-scheme heterojunction for efficient photocatalytic antibiotic degradation

Science China Materials, Journal Year: 2024, Volume and Issue: 67(2), P. 562 - 572

Published: Jan. 23, 2024

Language: Английский

---

Carbon Dot Biopolymer-Based Flexible Functional Films for Antioxidant and Food Monitoring Applications

ACS Applied Polymer Materials, Journal Year: 2022, Volume and Issue: 4(12), P. 9323 - 9340

Published: Nov. 29, 2022

Heteroatom-doped carbon dot (CD)-reinforced flexible, antioxidant, and UV-resistant polymeric thin films have been fabricated by a facile physical compounding strategy associated with the 'cast peel' technique. The prepared CDs were found to be stable in aqueous media because of their zeta potential value (−5.85 mV). There was no significant change values during 7 days storage, indicating long-term stability CPCDs. CD-reinforced thermoplastic starch (TPS)/κ-carrageenan hybrid developed as antioxidants improve shelf-life agro-products. Besides this, they also qualified for mechanical strength (>40 MPa), transparency (∼77%), nondeteriorative dimensional integrity at high relative humidity (∼97%), properties. For assessing food preservation behavior, leaching has studied time-dependent sustained release different simulant media, where it showed gradual alteration entrapment efficacy high-polarity gradient environments. mechanism CD obtained from non-Fickian fittings initial preplateaued kinetic data. Surprisingly, when these nanodots arrested inside polymer matrix, film excellent water vapor impermeability, low moisture retention, sufficient toughness, superficial compliance external flexing stretching. Also, CD-based TPS/κ-carrageenan exhibited strong antioxidant activity, determined 1,1-diphenyl-2-picrylhydrazyl (>85%) 2,2′-azinobis-(3-ethylbenzothiazoline-6-sulfonic acid assays (>90%). Thus, could promoted ideal alternatives packaging thin, tough, moisture-impermeable

Language: Английский

---

Toward Strong Near‐Infrared Absorption/Emission from Carbon Dots in Aqueous Media through Solvothermal Fusion of Large Conjugated Perylene Derivatives with Post‐Surface Engineering

Advanced Science, Journal Year: 2022, Volume and Issue: 9(23)

Published: June 2, 2022

Carbon dots (CDs) have attracted significant interest as one of the most emerging photoluminescence (PL) nanomaterials. However, realization CDs with dominant near-infrared (NIR) absorption/emission peaks in aqueous solution remains a great challenge. Herein, both main NIR absorption bands at 720 nm and emission 745 an are fabricated for first time by fusing large conjugated perylene derivatives under solvothermal treatment. With post-surface engineering, polyethyleneimine modified (PEI-CDs) exhibit enhanced PL quantum yields (PLQY) up to 8.3% 18.8% bovine serum albumin DMF solutions, which is highest PLQY region excitation. Density functional theory calculations support strategy achieve emissions from CDs. Compared commercial dye Indocyanine green, PEI-CDs excellent photostability much lower cost. Furthermore, obtained illustrate advantages remarkable two-photon angiography vivo fluorescence bioimaging. This work demonstrates promising molecules preparing strong promote their bioimaging applications.

Language: Английский

---

Carbon Dots as a Potential Therapeutic Agent for the Treatment of Cancer‐Related Anemia

Advanced Materials, Journal Year: 2022, Volume and Issue: 34(19)

Published: March 16, 2022

Due to the adverse effects of erythropoietin (EPO) on cancer patient survival, it is necessary develop new agents that can be used efficiently manage and treat cancer-related anemia. In this study, novel distinctive carbon dots, J-CDs, derived from jujube are designed, synthesized, characterized. Based obtained results, material comprises sp2 sp3 atoms, as well oxygen/nitrogen-based groups, specifically promotes proliferation erythroid cells by stimulating self-renewal progenitor in vitro vivo. Moreover, J-CDs have no discernible tumor metastasis, unlike EPO. Transcriptome profiling suggests upregulate molecules involved hypoxia response, they also significantly increase phosphorylation levels STAT5, major transducer signals for cell proliferation. Overall, study demonstrates effectively promote erythrocyte production without affecting metastasis; thus, may promising treatment

Language: Английский

---