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Lv H, Xia X, Sun S, Niu Z, Liu J, Li X. Polylactic acid electrospun membrane loaded with cerium nitrogen co-doped titanium dioxide for visible light-triggered antibacterial photocatalytic therapy. Front Microbiol 2024; 15:1375956. [PMID: 38711973 PMCID: PMC11071086 DOI: 10.3389/fmicb.2024.1375956] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2024] [Accepted: 03/26/2024] [Indexed: 05/08/2024] Open
Abstract
Wound infection caused by multidrug-resistant bacteria poses a serious threat to antibiotic therapy. Therefore, it is of vital importance to find new methods and modes for antibacterial therapy. The cerium nitrogen co-doped titanium dioxide nanoparticles (N-TiO2, 0.05Ce-N-TiO2, 0.1Ce-N-TiO2, and 0.2Ce-N-TiO2) were synthesized using the hydrothermal method in this study. Subsequently, electrospinning was employed to fabricate polylactic acid (PLA) electrospun membranes loaded with the above-mentioned nanoparticles (PLA-N, PLA-0.05, PLA-0.1, and PLA-0.2). The results indicated that cerium and nitrogen co-doping tetrabutyl titanate enhanced the visible light photocatalytic efficiency of TiO2 nanoparticles and enabled the conversion of ultraviolet light into harmless visible light. The photocatalytic reaction under visible light irradiation induced the generation of ROS, which could effectively inhibit the bacterial growth. The antibacterial assay showed that it was effective in eliminating S. aureus and E. coli and the survival rates of two types of bacteria under 30 min of irradiation were significantly below 20% in the PLA-0.2 experimental group. Moreover, the bactericidal membranes also have excellent biocompatibility performance. This bio-friendly and biodegradable membrane may be applied to skin trauma and infection in future to curb drug-resistant bacteria and provide more alternative options for antimicrobial therapy.
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Affiliation(s)
- Hanlin Lv
- Department of Stomatology, The Affiliated Hospital of Qingdao University, Qingdao, China
- School of Stomatology, Qingdao University, Qingdao, China
| | - Xiaomin Xia
- Department of Stomatology, The Affiliated Hospital of Qingdao University, Qingdao, China
- School of Stomatology, Qingdao University, Qingdao, China
| | - Sa Sun
- Department of Stomatology, The Affiliated Hospital of Qingdao University, Qingdao, China
- School of Stomatology, Qingdao University, Qingdao, China
| | - Zhaojun Niu
- Department of Stomatology, The Affiliated Hospital of Qingdao University, Qingdao, China
- School of Stomatology, Qingdao University, Qingdao, China
| | - Jie Liu
- Department of Stomatology, The Affiliated Hospital of Qingdao University, Qingdao, China
- School of Stomatology, Qingdao University, Qingdao, China
| | - Xue Li
- Department of Stomatology, The Affiliated Hospital of Qingdao University, Qingdao, China
- School of Stomatology, Qingdao University, Qingdao, China
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Zhang J, Cao Y, Zhao P, Xie T, Lin Y, Mu Z. Visible-light-driven pollutants degradation with carbon quantum dots/N-TiO2 under mild condition: Facile preparation, dramatic performance and deep mechanism insight. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2020.125019] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Pang C, Li R, Li Z, Dong N, Wang J, Ren F, Chen F. Plasmonic Ag nanoparticles embedded in lithium tantalate crystal for ultrafast laser generation. NANOTECHNOLOGY 2019; 30:334001. [PMID: 31013488 DOI: 10.1088/1361-6528/ab1b97] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
We report the Ag nanoparticles (NPs) embedded in LiTaO3 (AgNP:LT) by direct Ag+ ion implantation. Transmission electron microscope imaging indicates that the embedded Ag NPs have an average diameter of 3.65 nm. The linear optical absorption spectrum of AgNP:LT peaking at 477 nm is observed owing to the typical effect of localized surface plasmon resonance. Z-scan investigation shows ultrafast saturable absorption of AgNP:LT at the near infrared 1 μm wavelength, which enables AgNP:LT to be a new saturable absorber (SA) for the generation of 1 μm Q-switched mode-locked pulsed laser with pulse duration of 35 ps and repetition rate of 8.74 GHz. This work not only opens a new way to tailor the nonlinearity of LiTaO3 by embedding Ag+ NPs, but also develops AgNP:LT as a new SA for ultrafast laser generation.
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Affiliation(s)
- Chi Pang
- School of Physics, State Key Laboratory of Crystal Materials and Key Laboratory of Particle Physics and Particle Irradiation (MOE), Shandong University, Jinan 250100, People's Republic of China
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Mensah MB, McNaughter PD, McAdams SG, Tuna F, Lewis DJ, Awudza JAM, Revaprasadu N, O'Brien P. Ricinoleic Acid as a Green Alternative to Oleic Acid in the Synthesis of Doped Nanocrystals. ChemistrySelect 2018. [DOI: 10.1002/slct.201803253] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Michael B. Mensah
- Department of Chemistry; Kwame Nkrumah University of Science and Technology, PMB; Kumasi Ghana
| | - Paul D. McNaughter
- The School of Chemistry; The University of Manchester, Oxford Road; Manchester M13 9PL United Kingdom
| | - Simon G. McAdams
- The School of Chemistry; The University of Manchester, Oxford Road; Manchester M13 9PL United Kingdom
| | - Floriana Tuna
- The School of Chemistry; The University of Manchester, Oxford Road; Manchester M13 9PL United Kingdom
| | - David J. Lewis
- The School of Materials; The University of Manchester, Oxford Road; Manchester M13 9PL United Kingdom
| | - Johannes A. M. Awudza
- Department of Chemistry; Kwame Nkrumah University of Science and Technology, PMB; Kumasi Ghana
| | - Neerish Revaprasadu
- Department of Chemistry; University of Zululand, Private Bag X1001; KwaDlangezwa 3886 South Africa
| | - Paul O'Brien
- The School of Chemistry; The University of Manchester, Oxford Road; Manchester M13 9PL United Kingdom
- The School of Materials; The University of Manchester, Oxford Road; Manchester M13 9PL United Kingdom
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Jackson R, Patrick PS, Page K, Powell MJ, Lythgoe MF, Miodownik MA, Parkin IP, Carmalt CJ, Kalber TL, Bear JC. Chemically Treated 3D Printed Polymer Scaffolds for Biomineral Formation. ACS OMEGA 2018; 3:4342-4351. [PMID: 29732454 PMCID: PMC5928486 DOI: 10.1021/acsomega.8b00219] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/05/2018] [Accepted: 03/26/2018] [Indexed: 06/08/2023]
Abstract
We present the synthesis of nylon-12 scaffolds by 3D printing and demonstrate their versatility as matrices for cell growth, differentiation, and biomineral formation. We demonstrate that the porous nature of the printed parts makes them ideal for the direct incorporation of preformed nanomaterials or material precursors, leading to nanocomposites with very different properties and environments for cell growth. Additives such as those derived from sources such as tetraethyl orthosilicate applied at a low temperature promote successful cell growth, due partly to the high surface area of the porous matrix. The incorporation of presynthesized iron oxide nanoparticles led to a material that showed rapid heating in response to an applied ac magnetic field, an excellent property for use in gene expression and, with further improvement, chemical-free sterilization. These methods also avoid changing polymer feedstocks and contaminating or even damaging commonly used selective laser sintering printers. The chemically treated 3D printed matrices presented herein have great potential for use in addressing current issues surrounding bone grafting, implants, and skeletal repair, and a wide variety of possible incorporated material combinations could impact many other areas.
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Affiliation(s)
- Richard
J. Jackson
- UCL
Healthcare Biomagnetics Laboratory, The
Royal Institution of Great Britain, 21 Albemarle Street, London W1S 4BS, U.K.
| | - P. Stephen Patrick
- Centre
for Advanced Biomedical Imaging (CABI), Department of Medicine and
Institute of Child Health, University College
London, London WC1E 6DD, U.K.
| | - Kristopher Page
- Materials
Chemistry Centre, Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, U.K.
| | - Michael J. Powell
- Materials
Chemistry Centre, Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, U.K.
| | - Mark F. Lythgoe
- Centre
for Advanced Biomedical Imaging (CABI), Department of Medicine and
Institute of Child Health, University College
London, London WC1E 6DD, U.K.
| | - Mark A. Miodownik
- Department
of Mechanical Engineering, University College
London, London WC1E 7JE, U.K.
| | - Ivan P. Parkin
- Materials
Chemistry Centre, Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, U.K.
| | - Claire J. Carmalt
- Materials
Chemistry Centre, Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, U.K.
| | - Tammy L. Kalber
- Centre
for Advanced Biomedical Imaging (CABI), Department of Medicine and
Institute of Child Health, University College
London, London WC1E 6DD, U.K.
| | - Joseph C. Bear
- School
of Life Science, Pharmacy & Chemistry, Kingston University London, Penrhyn Road, Kingston upon Thames, Surrey KT1 2EE, U.K.
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Wang Q, Geng Y, Li J, Yin M, Hu Y, Liu Y, Pan K. Novel magnetic-fluorescent bifunctional Janus nanofiber membrane. NANOTECHNOLOGY 2018; 29:135702. [PMID: 29363616 DOI: 10.1088/1361-6528/aaaa2e] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Magnetic-fluorescent bifunctional materials have received global attention owing to their potential in many fields. Herein, we reported a novel magnetic-fluorescent bifunctional Janus nanofiber membrane (NFM) by adding the as-prepared magnetic CoFe2O4 nanoparticles into the polyacrylonitrile (PAN) side (m-PAN) and the fluorescent molecules of 1,8-naphthalene anhydride (1,8-NAD) into the polyvinylpyrrolidone (PVP) side (f-PVP) via electrospinning method. The obtained m-PAN/f-PVP Janus NFM exhibited excellent magnetic performance and high fluorescent properties due to the unique structure. Compared with the m-PAN/f-PVP composite NFM, the Janus NFM showed higher fluorescent performance because the fluorescent molecules were isolated from the magnetic nanoparticles. In addition, the Janus NFM not only maintain the good self-supporting state in water but also realize a directional movement attracted by a magnet. The unique structure of Janus nanofiber is of great importance and demonstrates great potential applications.
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Jones DR, Gomez V, Bear JC, Rome B, Mazzali F, McGettrick JD, Lewis AR, Margadonna S, Al-Masry WA, Dunnill CW. Active removal of waste dye pollutants using Ta 3N 5/W 18O 49 nanocomposite fibres. Sci Rep 2017; 7:4090. [PMID: 28642612 PMCID: PMC5481444 DOI: 10.1038/s41598-017-04240-4] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
A scalable solvothermal technique is reported for the synthesis of a photocatalytic composite material consisting of orthorhombic Ta3N5 nanoparticles and WOx≤3 nanowires. Through X-ray diffraction and X-ray photoelectron spectroscopy, the as-grown tungsten(VI) sub-oxide was identified as monoclinic W18O49. The composite material catalysed the degradation of Rhodamine B at over double the rate of the Ta3N5 nanoparticles alone under illumination by white light, and continued to exhibit superior catalytic properties following recycling of the catalysts. Moreover, strong molecular adsorption of the dye to the W18O49 component of the composite resulted in near-complete decolourisation of the solution prior to light exposure. The radical species involved within the photocatalytic mechanisms were also explored through use of scavenger reagents. Our research demonstrates the exciting potential of this novel photocatalyst for the degradation of organic contaminants, and to the authors' knowledge the material has not been investigated previously. In addition, the simplicity of the synthesis process indicates that the material is a viable candidate for the scale-up and removal of dye pollutants on a wider scale.
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Affiliation(s)
- Daniel R Jones
- Energy Safety Research Institute (ESRI), Swansea University Bay Campus, Swansea, SA1 8EN, UK
| | - Virginia Gomez
- Energy Safety Research Institute (ESRI), Swansea University Bay Campus, Swansea, SA1 8EN, UK
| | - Joseph C Bear
- Materials Chemistry Centre, Department of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ, UK
| | - Bertrand Rome
- Energy Safety Research Institute (ESRI), Swansea University Bay Campus, Swansea, SA1 8EN, UK
| | - Francesco Mazzali
- College of Engineering, Swansea University Bay Campus, Swansea, SA1 8EN, UK
| | | | - Aled R Lewis
- Systems and Processing Engineering Centre (SPEC), Swansea University Bay Campus, Swansea, SA1 8EN, UK
| | - Serena Margadonna
- College of Engineering, Swansea University Bay Campus, Swansea, SA1 8EN, UK
| | - Waheed A Al-Masry
- Department of Chemical Engineering, King Saud University, Riyadh, Saudi Arabia
| | - Charles W Dunnill
- Energy Safety Research Institute (ESRI), Swansea University Bay Campus, Swansea, SA1 8EN, UK.
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Geng Y, Zhang P, Wang Q, Liu Y, Pan K. Novel PAN/PVP Janus ultrafine fiber membrane and its application for biphasic drug release. J Mater Chem B 2017; 5:5390-5396. [DOI: 10.1039/c7tb00929a] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Materials with Janus structures have attracted significant attention in recent years.
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Affiliation(s)
- Yuting Geng
- Beijing University of Chemical Technology
- Materials Science and Engineering
- Beijing
- China
| | - Pan Zhang
- Beijing University of Chemical Technology
- Materials Science and Engineering
- Beijing
- China
| | - Qiutong Wang
- Beijing University of Chemical Technology
- Materials Science and Engineering
- Beijing
- China
| | - Yangxiu Liu
- Beijing University of Chemical Technology
- Materials Science and Engineering
- Beijing
- China
| | - Kai Pan
- Beijing University of Chemical Technology
- Materials Science and Engineering
- Beijing
- China
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