Luminescent carbon nanoparticles immobilized in polymer hydrogels for pH sensing

Diyuk, N. V.; Keda, Tetiana Ye.; Zaderko, Alexander N.; Mussabek, Gauhar; Надтока, Оксана; Kutsevol, N.; Lisnyak, Vladyslav V.

doi:10.1007/s13204-022-02536-0

Cited by 4 publications

(4 citation statements)

References 37 publications

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“…The total weight loss caused by oxygen-containing groups and aniline remains is 92.4% by weight (68.8%, for CD sample), so we can suggest a presence of 23.6% of toluidine remains. A distinctive feature of this type of CD is the presence of very large amount of different surface functionalities including oxygen, nitrogen groups and aniline remains [ 22 – 24 ].…”

Section: Resultsmentioning

confidence: 99%

In vitro and in vivo toxicity of carbon dots with different chemical compositions

Kuznietsova,

Géloën,

Dziubenko

et al. 2023

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Carbon dots (CDs) are easy-obtained nanoparticles with wide range of biological activity; however, their toxicity after prolonged exposure is poorly investigated. So, in vitro and in vivo toxicity of CDs with the surfaces enriched with hydroxylated hydrocarbon chains and methylene groups (CD_GE), carboxyl and phenol groups accompanied with nitrogen (CD_3011), trifluoromethyl (CDF19) or toluidine and aniline groups (CDN19) were aimed to be discovered. CDs’ in vitro toxicity was assessed on A549 cells (real-time cell analysis of impedance, fluorescence microscopy) after 24 h of incubation, and we observed no changes in cell viability and morphology. CDs’ in vivo toxicity was assessed on C57Bl6 mice after multiple dosages (5 mg/kg subcutaneously) for 14 days. Lethality (up to 50%) was observed in CDN19 and CD_3011 groups on different days of dosing, accompanied by toxicity signs in case of CD_3011. There were no changes in serum biochemical parameters except Urea (increased in CDF19 and CD_3011 groups), nor substantial kidney, liver, and spleen injuries. The most impactful for all organs were also CD_3011 and CDF19, causing renal tubule injury and liver blood supply violation. Thus, CDs with a surface enriched with oxygen- and nitrogen-containing functional groups might be toxic after multiple everyday dosing, without, however, significant damages of internal organs in survived animals.

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Section: Resultsmentioning

confidence: 99%

In vitro and in vivo toxicity of carbon dots with different chemical compositions

Kuznietsova,

Géloën,

Dziubenko

et al. 2023

Discover Nano

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“…[20]. Meng and colleagues [31] synthesized a flower-like hierarchical structure using citric acid C 6 H 8 O 7 and identified (-COOH) functional groups as key contributors to nanoplate growth [21][22][23]. In this work, we replaced the inorganic compound to the nitric acid and studied characteristics such as optical absorption and photoelectrochemical activity.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of hierarchical wo3 microspheres for photoelectrochemical water splitting application

Markhabayeva

2023

phst

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In this work, hierarchical WO 3 microspheres were synthesized using chemical bath deposition. The morphology of the synthesized sample was studied using scanning electron microscopy (SEM). The hierarchical WO 3 microspheres formed from spontaneously self-assembled nanosheets have a high specific surface area. Structural characterizations of sample were performed using X-ray diffraction (XRD) and Raman spectroscopy. Analysis of XRD spectra showed that synthesized particles have a monoclinic modification. The optical properties of the sample were studied using UV-Vis diffuse reflectance absorption spectra. The value of the energy gap calculated from the absorption spectra is 2.25 eV, which indicates high light absorption ability. A photocurrent study was done to investigate the photocatalytic activity. The photoelectrode was prepared using hierarchical WO 3 microspheres and polymer deposited on fluorine doped tin oxide (FTO) glass via spin coating technique. A remarkable photocurrent density of 18 A/cm 2 at 0.5 V was achieved. The elongated structures improved light absorption ability and photocatalytic activity, and might be perspective as photoanode in photoelectrochemical cells.

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“…Therefore, the membrane must have maximum conductivity. For use in fuel cell specific conductivity at the level of 10 -1 -10 -3 cm/cm is required [5][6][7][8][9][10][11][12][13][14][15]. In recent years, a small number of new polymers have been received a great attention, for instance, per (fluorinated) membranes of the type Nafion is developed for completely proton exchange membrane fuel cell and commercialized.…”

Section: Introductionmentioning

confidence: 99%

“…The optimization of transportation process of hydronium ion in proton exchange membrane is important at the molecular level at the different time scale and length-scale. Hereinafter, study of formation mechanism of poly(acrylic acid) and graphene oxide-based composite materials and its application for hydronium ion transportation for proton exchange membrane at the molecular level can be mapped with macroscopic properties of this material [13][14][15][16][17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Implementation of molecular modeling to investigate ion transportation in proton exchange membranes comprising graphene oxide and polyacrylate nanocomposites

Kemelbekova

2023

phst

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Proton exchange membranes (PEMs) play a critical role in various energy conversion devices, such as fuel cells. Developing advanced PEMs with improved hydronium ion transportation and chemical stability is essential for enhancing the performance and durability of these devices. In this research project, we focus on the development and molecular modeling study of a novel composite material based on poly(acrylic acid) and graphene oxide for application as a high-performance proton exchange membrane. The need for better PEMs has led us to explore the potential of combining poly(acrylic acid) and graphene oxide, as both materials offer unique advantages in terms of proton conductivity and mechanical strength. Our goal is to investigate how these two components interact and synergize to enhance the overall performance of the PEM, particularly in challenging operating conditions. To achieve this, classical all-atom Molecular Dynamics (MD) simulations using Gromacs software were employed. The simulations allowed us to study the formation mechanism of the poly(acrylic acid) and graphene oxide composite material and its application in facilitating hydronium ion transportation within the PEM. Our simulation results revealed fascinating insights into the composite material's behavior. Notably, we observed the emergence of new interactions between poly(acrylate) oligomers and graphene oxide layers, evident from the analysis of interaction energy values. These interactions contribute to the material's enhanced transport properties, making it promising for PEM applications. Moreover, we assessed the mobility of hydronium ions in the graphene oxide and polyacrylate nanocomposite-based PEM and found it comparable to the mobility in traditional poly(acrylate)-based PEMs.

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Luminescent carbon nanoparticles immobilized in polymer hydrogels for pH sensing

Cited by 4 publications

References 37 publications

In vitro and in vivo toxicity of carbon dots with different chemical compositions

In vitro and in vivo toxicity of carbon dots with different chemical compositions

Synthesis of hierarchical wo3 microspheres for photoelectrochemical water splitting application

Implementation of molecular modeling to investigate ion transportation in proton exchange membranes comprising graphene oxide and polyacrylate nanocomposites

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