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  1. Article ; Online: Boron Nitride Nanosheet-Magnetic Nanoparticle Composites for Water Remediation Applications.

    Dee, Garret / O'Donoghue, Olivia / Devitt, Eoin / Giroud, Tiphaine / Rafferty, Aran / Gannon, Lee / McGuinness, Cormac / Gun'ko, Yurii K

    ACS omega

    2024  Volume 9, Issue 4, Page(s) 4347–4358

    Abstract: The combination of 0D nanoparticles with 2D nanomaterials has attracted a lot of attention over the last years due to the unique multimodal properties of resulting 0D-2D nanocomposites. In this work, we developed boron nitride nanosheets (BNNS) ... ...

    Abstract The combination of 0D nanoparticles with 2D nanomaterials has attracted a lot of attention over the last years due to the unique multimodal properties of resulting 0D-2D nanocomposites. In this work, we developed boron nitride nanosheets (BNNS) functionalized with manganese ferrite magnetic nanoparticles (MNPs). The functionalization process involved attachment of MNPs to exfoliated BNNS by refluxing the precursor materials in a polyol medium. Characterization of the produced BNNS-MNP composites was carried out using powder X-ray diffraction, transmission electron microscopy, vibrating sample magnetometry, Fourier transform infrared spectroscopy, and X-ray photoelectron spectroscopy. The adhesion of MnFe
    Language English
    Publishing date 2024-01-15
    Publishing country United States
    Document type Journal Article
    ISSN 2470-1343
    ISSN (online) 2470-1343
    DOI 10.1021/acsomega.3c06593
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: MnFe

    Dee, Garret / Shayoub, Hend / McNeill, Helen / Lozano, Itziar Sánchez / Rafferty, Aran / Gun'ko, Yurii K

    RSC advances

    2023  Volume 13, Issue 16, Page(s) 10513–10522

    Abstract: Removal of dye pollutants from wastewater is among the most important emerging needs in environmental science and engineering. The main objective of our work is to develop new magnetic core-shell nanostructures and explore their use for potential removal ...

    Abstract Removal of dye pollutants from wastewater is among the most important emerging needs in environmental science and engineering. The main objective of our work is to develop new magnetic core-shell nanostructures and explore their use for potential removal of pollutants from water using an external magnetic field. Herein, we have prepared magnetic core-shell nanoparticles that demonstrated excellent dye pollutant adsorbent properties. These nanoparticles are composed of a manganese ferrite magnetic core coated with silica, to protect the core and enable further functionalisation, then finally coated with ceria, which is shown to be an effective adsorbent. The magnetic core-shell nanostructures have been synthesized by a modification of solvothermal synthesis. The nanoparticles were fully characterised at each stage of the synthesis by powder X-ray diffraction (pXRD), transmission electron microscopy (TEM), vibrating sample magnetometry (VSM) and Fourier transform infrared spectroscopy (FTIR). These particles were found to be effective in removing methylene blue (MB) dye from water, which was validated by UV-visible (UV-vis) spectroscopy. These particles can be quickly removed from solution using a permanent magnet and then can be recycled after being placed in the furnace at 400 °C to burn off any organic residues. The particles were found to retain their ability to adsorb the pollutant after several cycles and TEM images of the particles after several cycles showed no change in the morphology. This research demonstrated the capacity of magnetic core-shell nanostructures to be used for water remediation.
    Language English
    Publishing date 2023-04-03
    Publishing country England
    Document type Journal Article
    ISSN 2046-2069
    ISSN (online) 2046-2069
    DOI 10.1039/d3ra01112g
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: XRD and Spectroscopic Investigations of ZIF-Microchannel Glass Plates Composites.

    Narimbi, Justin / Balakrishnan, Sivakumar / Perova, Tatiana S / Dee, Garret / Swiegers, Gerhard F / Gun'ko, Yurii K

    Materials (Basel, Switzerland)

    2023  Volume 16, Issue 6

    Abstract: In this study, new composite materials comprising zeolitic imidazolate framework (ZIF) structures and microchannel glass (MCG) plates were fabricated using the hydrothermal method and their morphological and spectral properties were investigated using ... ...

    Abstract In this study, new composite materials comprising zeolitic imidazolate framework (ZIF) structures and microchannel glass (MCG) plates were fabricated using the hydrothermal method and their morphological and spectral properties were investigated using XRD, SEM, FTIR, and Raman spectroscopy. XRD studies of powder samples revealed the presence of an additional phase for a ZIF-8 sample, whereas ZIF-67 samples, which were prepared through two different chemical routes, showed no additional phases. A detailed analysis of the FTIR and micro-Raman spectra of the composite samples revealed the formation of stable ZIF structures inside the macropores of the MCG substrate. The hydrophilic nature of the MCG substrate and its interaction with the ZIF structure resulted in the formation of stable ZIF-MCG composites. We believe that these composite materials may find a wide range of important applications in the field of sensors, molecular sieving.
    Language English
    Publishing date 2023-03-17
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2487261-1
    ISSN 1996-1944
    ISSN 1996-1944
    DOI 10.3390/ma16062410
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Boron Nitride Nanosheets Functionalized with Fe

    Dee, Garret / O'Donoghue, Olivia / Rafferty, Aran / Gannon, Lee / McGuinness, Cormac / Gun'ko, Yurii K

    ACS applied nano materials

    2023  Volume 6, Issue 13, Page(s) 12526–12536

    Abstract: Nanofiltration (NF) is one of the emerging technologies that is very promising for water purification among many other applications. 2D boron nitride (BN) based nanomaterials are excellent building blocks for NF membranes. In our work, BN nanosheets ( ... ...

    Abstract Nanofiltration (NF) is one of the emerging technologies that is very promising for water purification among many other applications. 2D boron nitride (BN) based nanomaterials are excellent building blocks for NF membranes. In our work, BN nanosheets (BNNS) have been functionalized with magnetic nanoparticles (MNPs) to form BNNS-MNP nanocomposites. It was found that the nanocomposites are stable with the MNPs giving very good coverage with both magnetite and cobalt ferrite MNPs and showing good attachment and stability to sonication. These nanocomposites have been tested for removal of methylene blue (MB) dye and MNPs from water. BNNS-magnetite nanocomposites showed higher removal efficiency of the MB from water than the corresponding pure BNNS, while the BNNS-cobalt ferrite removal efficiency was slightly less than the pure BNNS. The BNNS-cobalt ferrite material was regenerated by burning off the MB and recycled to show the recyclability of this material. The BNNS membranes were tested for filtration of 14 ± 4 nm magnetite MNPs and were found to capture 100% of the nanoparticles with no MNPs left in the filtrate. Thus, we have developed magnetic nanocomposite membranes, which have demonstrated great potential for water remediation. We believe that this research opens up promising ways for production of 2D nanocomposite materials with multiple applications.
    Language English
    Publishing date 2023-06-22
    Publishing country United States
    Document type Journal Article
    ISSN 2574-0970
    ISSN (online) 2574-0970
    DOI 10.1021/acsanm.3c02375
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Correction: Electrostatically modulated magnetophoretic transport of functionalised iron-oxide nanoparticles through hydrated networks.

    Lyons, Stephen / Mc Kiernan, Eoin P / Dee, Garret / Brougham, Dermot F / Morrin, Aoife

    Nanoscale

    2021  Volume 13, Issue 2, Page(s) 1365–1366

    Abstract: Correction for 'Electrostatically modulated magnetophoretic transport of functionalised iron-oxide nanoparticles through hydrated networks' by Stephen Lyons et al., Nanoscale, 2020, 12, 10550-10558, DOI: 10.1039/D0NR01602K. ...

    Abstract Correction for 'Electrostatically modulated magnetophoretic transport of functionalised iron-oxide nanoparticles through hydrated networks' by Stephen Lyons et al., Nanoscale, 2020, 12, 10550-10558, DOI: 10.1039/D0NR01602K.
    Language English
    Publishing date 2021-01-06
    Publishing country England
    Document type Published Erratum
    ZDB-ID 2515664-0
    ISSN 2040-3372 ; 2040-3364
    ISSN (online) 2040-3372
    ISSN 2040-3364
    DOI 10.1039/d0nr90262d
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Electrostatically modulated magnetophoretic transport of functionalised iron-oxide nanoparticles through hydrated networks.

    Lyons, Stephen / Mc Kiernan, Eoin P / Dee, Garret / Brougham, Dermot F / Morrin, Aoife

    Nanoscale

    2020  Volume 12, Issue 19, Page(s) 10550–10558

    Abstract: Factors that determine magnetophoretic transport of magnetic nanoparticles (MNPs) through hydrated polymer networks under the influence of an external magnetic field gradient were studied. Functionalised iron oxide cores (8.9 nm core diameter) were ... ...

    Abstract Factors that determine magnetophoretic transport of magnetic nanoparticles (MNPs) through hydrated polymer networks under the influence of an external magnetic field gradient were studied. Functionalised iron oxide cores (8.9 nm core diameter) were tracked in real-time as they moved through agarose gels under the influence of an inhomogeneous magnetic field. Terminal magnetophoretic velocities were observed in all cases, these were quantified and found to be highly reproducible and sensitive to the conditions. Increasing agarose content reduced magnetophoretic velocity, we attribute this to increasingly tortuous paths through the porous hydrated polymer network and propose a new factor to quantify the tortuosity. The impact of MNP surface functionalisation, charge, network fixed charge content, and ionic strength of the aqueous phase on velocity were studied to separate these effects. For MNPs functionalised with polyethylene glycol (PEG) increasing chain length reduced velocity but the tortuosity extracted, which is a function of the network, was unchanged; validating the approach. For charged citrate- and arginine-functionalised MNPs, magnetophoretic velocities were found to increase for particles with positive and decrease for particles with negative zeta potential. In both cases these effects could be moderated by reducing the number of agarose anionic residues and/or increasing the ionic strength of the aqueous phase; conditions under which tortuosity again becomes the critical factor. A model for MNP transport identifying the contributions from the tortuous pore network and from electrostatic effects associated with the pore constrictions is proposed.
    Language English
    Publishing date 2020-03-11
    Publishing country England
    Document type Journal Article
    ZDB-ID 2515664-0
    ISSN 2040-3372 ; 2040-3364
    ISSN (online) 2040-3372
    ISSN 2040-3364
    DOI 10.1039/d0nr01602k
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Luminescent lanthanide (Eu(iii)) cross-linked supramolecular metallo co-polymeric hydrogels: the effect of ligand symmetry.

    Bradberry, Samuel J / Dee, Garret / Kotova, Oxana / McCoy, Colin P / Gunnlaugsson, Thorfinnur

    Chemical communications (Cambridge, England)

    2019  Volume 55, Issue 12, Page(s) 1754–1757

    Abstract: Two lanthanide luminescent naphthyl-dipicolinic amide (dpa) methacrylate monomers for the synthesis of grafted supramolecular co-polymer gels (hydrogels), and their use as additional crosslinks in robust covalently cross-linked HEMA hydrogels is ... ...

    Abstract Two lanthanide luminescent naphthyl-dipicolinic amide (dpa) methacrylate monomers for the synthesis of grafted supramolecular co-polymer gels (hydrogels), and their use as additional crosslinks in robust covalently cross-linked HEMA hydrogels is presented; the results demonstrate the importance of the ligand symmetry for the Eu(iii) emission from the hydrogels.
    Language English
    Publishing date 2019-01-16
    Publishing country England
    Document type Journal Article
    ZDB-ID 1472881-3
    ISSN 1364-548X ; 1359-7345 ; 0009-241X
    ISSN (online) 1364-548X
    ISSN 1359-7345 ; 0009-241X
    DOI 10.1039/c8cc08888h
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article: Design and Development of Magnetic Iron Core Gold Nanoparticle-Based Fluorescent Multiplex Assay to Detect

    Zhao, Xinyi / Smith, Gwendoline / Javed, Bilal / Dee, Garret / Gun'ko, Yurii K / Curtin, James / Byrne, Hugh J / O'Connor, Christine / Tian, Furong

    Nanomaterials (Basel, Switzerland)

    2022  Volume 12, Issue 21

    Abstract: ... ...

    Abstract Salmonella
    Language English
    Publishing date 2022-11-07
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2662255-5
    ISSN 2079-4991
    ISSN 2079-4991
    DOI 10.3390/nano12213917
    Database MEDical Literature Analysis and Retrieval System OnLINE

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