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Sánchez Reyna PA, Olea Mejía OF, González-Pedroza MG, Montiel-Bastida NM, Rebollo-Plata B, Morales-Luckie RA. Inhibition of the Growth of Escherichia coli and Staphylococcus aureus Microorganisms in Aesthetic Orthodontic Brackets through the In Situ Synthesis of Ag, TiO 2 and Ag/TiO 2 Nanoparticles. Microorganisms 2024; 12:1583. [PMID: 39203425 PMCID: PMC11356132 DOI: 10.3390/microorganisms12081583] [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: 07/05/2024] [Revised: 07/29/2024] [Accepted: 07/30/2024] [Indexed: 09/03/2024] Open
Abstract
Plaque control is especially important during orthodontic treatment because areas of the teeth near brackets and wires are difficult to clean with a toothbrush, resulting in debris buildup of food or dental plaque, thus causing caries and periodontal disease. The objective of this study was to evaluate the antimicrobial properties of silver nanoparticles (AgNPs), titanium dioxide nanoparticles (TiO2NPs), and silver/titanium dioxide nanoparticles (Ag/TiO2NPs), synthesized on the surface of α-alumina ceramic brackets. The AgNPs and TiO2NPs were synthesized by a simple chemical method, and these were characterized by XRD, SEM, and XPS TEM; the antimicrobial activity was tested against Staphylococcus aureus and Escherichia coli by diffusion test. The results of this study demonstrated that by this simple chemical method, silver and titanium dioxide nanoparticles can be synthesized on the surface of α-alumina esthetic brackets, and these NPs possess good antimicrobial activity and the possibility of reducing dental caries, periodontal disease, and white spot generated during orthodontic treatment.
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Affiliation(s)
- Paola Ariselda Sánchez Reyna
- Center for Advanced Studies and Research on Dentistry, Autonomous University of the State of Mexico (UAEMex), Toluca 50200, Mexico; (P.A.S.R.); (N.M.M.-B.)
| | - Oscar Fernando Olea Mejía
- Department of Materials Science, Center for Research in Sustainable Chemistry (CCIQS), Autonomous University of the State of Mexico (UAEMex), Km 14.5, Carr. Toluca-Atlacomulco, Toluca 50200, Mexico;
| | - María G. González-Pedroza
- Department of Biotechnology, Faculty of Sciences, Autonomous University of the State of Mexico (UAEMex), Km 14.5, Carr. Toluca-Atlacomulco, Toluca 50200, Mexico;
| | - Norma M. Montiel-Bastida
- Center for Advanced Studies and Research on Dentistry, Autonomous University of the State of Mexico (UAEMex), Toluca 50200, Mexico; (P.A.S.R.); (N.M.M.-B.)
| | - Bernabe Rebollo-Plata
- Tecnológico Nacional de México, Instituto Tecnológico Superior de Irapuato, Carr. Irapuato-Silao Km 12.5, Irapuato 36821, Mexico;
| | - Raúl A. Morales-Luckie
- Department of Materials Science, Center for Research in Sustainable Chemistry (CCIQS), Autonomous University of the State of Mexico (UAEMex), Km 14.5, Carr. Toluca-Atlacomulco, Toluca 50200, Mexico;
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Vrithias NR, Katsara K, Papoutsakis L, Papadakis VM, Viskadourakis Z, Remediakis IN, Kenanakis G. Three-Dimensional-Printed Photocatalytic Sponges Decorated with Mn-Doped ZnO Nanoparticles. MATERIALS (BASEL, SWITZERLAND) 2023; 16:5672. [PMID: 37629963 PMCID: PMC10456673 DOI: 10.3390/ma16165672] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2023] [Revised: 08/12/2023] [Accepted: 08/15/2023] [Indexed: 08/27/2023]
Abstract
The present work reports on the fabrication of high-density polyethylene sponges, decorated with Mn-doped ZnO nanostructures. The sponges were developed utilizing three-dimensional printing technology, while Mn-doped ZnO nanostructures, with varying doping levels, were grown at mild temperatures. The nanostructures were fully characterized by means of scanning electron microscopy, X-ray diffraction, and Raman spectroscopy, revealing the existence of Mn doping. Moreover, their photocatalytic properties were investigated using the degradation/decolorization of a commercially available liquid laundry detergent, based on synthetic, less foaming ingredients, under UV irradiation. The Mn-doped ZnO nanostructures show better photocatalytic activity at higher doping levels. This study demonstrates that it is possible to achieve the adequate degradation of a typical detergent solution in water by means of low-cost and environmentally friendly approaches, while Mn-doped ZnO/HDPE nanostructures are good candidates for real environmental applications.
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Affiliation(s)
- Nikolaos Rafael Vrithias
- Institute of Electronic Structure and Laser, Foundation for Research & Technology-Hellas, N. Plastira 100, 700 13 Heraklion, Crete, Greece; (N.R.V.)
- Department of Materials Science and Technology, University of Crete, 710 03 Heraklion, Crete, Greece
| | - Klytaimnistra Katsara
- Institute of Electronic Structure and Laser, Foundation for Research & Technology-Hellas, N. Plastira 100, 700 13 Heraklion, Crete, Greece; (N.R.V.)
- Department of Agriculture, Hellenic Mediterranean University, Estavromenos, 714 10 Heraklion, Crete, Greece
| | - Lampros Papoutsakis
- Institute of Electronic Structure and Laser, Foundation for Research & Technology-Hellas, N. Plastira 100, 700 13 Heraklion, Crete, Greece; (N.R.V.)
- Department of Chemistry, University of Crete, 710 03 Heraklion, Crete, Greece
| | - Vassilis M. Papadakis
- Institute of Electronic Structure and Laser, Foundation for Research & Technology-Hellas, N. Plastira 100, 700 13 Heraklion, Crete, Greece; (N.R.V.)
- Department of Industrial Design and Production Engineering, University of West Attica, 122 43 Athens, Greece
| | - Zacharias Viskadourakis
- Institute of Electronic Structure and Laser, Foundation for Research & Technology-Hellas, N. Plastira 100, 700 13 Heraklion, Crete, Greece; (N.R.V.)
| | - Ioannis N. Remediakis
- Institute of Electronic Structure and Laser, Foundation for Research & Technology-Hellas, N. Plastira 100, 700 13 Heraklion, Crete, Greece; (N.R.V.)
- Department of Materials Science and Technology, University of Crete, 710 03 Heraklion, Crete, Greece
| | - George Kenanakis
- Institute of Electronic Structure and Laser, Foundation for Research & Technology-Hellas, N. Plastira 100, 700 13 Heraklion, Crete, Greece; (N.R.V.)
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3
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Methods and strategies for producing porous photocatalysts: Review. J SOLID STATE CHEM 2023. [DOI: 10.1016/j.jssc.2023.123834] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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Sevastaki M, Suchea MP, Kenanakis G. 3D Printed Fully Recycled TiO 2-Polystyrene Nanocomposite Photocatalysts for Use against Drug Residues. NANOMATERIALS 2020; 10:nano10112144. [PMID: 33126439 PMCID: PMC7692178 DOI: 10.3390/nano10112144] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Revised: 10/23/2020] [Accepted: 10/26/2020] [Indexed: 11/25/2022]
Abstract
In the present work, the use of nanocomposite polymeric filaments based on 100% recycled solid polystyrene everyday products, enriched with TiO2 nanoparticles with mass concentrations up to 40% w/w, and the production of 3D photocatalytic structures using a typical fused deposition modeling (FDM)-type 3D printer are reported. We provide evidence that the fabricated 3D structures offer promising photocatalytic properties, indicating that the proposed technique is indeed a novel low-cost alternative route for fabricating large-scale photocatalysts, suitable for practical real-life applications.
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Affiliation(s)
- Maria Sevastaki
- Institute of Electronic Structure and Laser, Foundation for Research & Technology-Hellas, N. Plastira 100, 70013 Heraklion, Crete, Greece;
- Department of Chemistry, University of Crete, 71003 Heraklion, Crete, Greece
| | - Mirela Petruta Suchea
- National Institute for Research and Development in Microtechnologies (IMT-Bucharest), 1 26 A, Erou Iancu Nicolae Street, P.O. Box 38-160, 023573 Bucharest, Romania
- Center of Materials Technology and Photonics, Hellenic Mediterranean University, 71004 Heraklion, Crete, Greece
- Correspondence: (M.P.S.); (G.K.)
| | - George Kenanakis
- Institute of Electronic Structure and Laser, Foundation for Research & Technology-Hellas, N. Plastira 100, 70013 Heraklion, Crete, Greece;
- Correspondence: (M.P.S.); (G.K.)
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5
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Hooshmand S, Kargozar S, Ghorbani A, Darroudi M, Keshavarz M, Baino F, Kim HW. Biomedical Waste Management by Using Nanophotocatalysts: The Need for New Options. MATERIALS (BASEL, SWITZERLAND) 2020; 13:E3511. [PMID: 32784877 PMCID: PMC7476041 DOI: 10.3390/ma13163511] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Revised: 08/01/2020] [Accepted: 08/03/2020] [Indexed: 12/15/2022]
Abstract
Biomedical waste management is getting significant consideration among treatment technologies, since insufficient management can cause danger to medicinal service specialists, patients, and their environmental conditions. The improvement of waste administration protocols, plans, and policies are surveyed, despite setting up training programs on legitimate waste administration for all healthcare service staff. Most biomedical waste substances do not degrade in the environment, and may also not be thoroughly removed through treatment processes. Therefore, the long-lasting persistence of biomedical waste can effectively have adverse impact on wildlife and human beings, as well. Hence, photocatalysis is gaining increasing attention for eradication of pollutants and for improving the safety and clearness of the environment due to its great potential as a green and eco-friendly process. In this regard, nanostructured photocatalysts, in contrast to their regular counterparts, exhibit significant attributes such as non-toxicity, low cost and higher absorption efficiency in a wider range of the solar spectrum, making them the best candidate to employ for photodegradation. Due to these unique properties of nanophotocatalysts for biomedical waste management, we aim to critically evaluate various aspects of these materials in the present review and highlight their importance in healthcare service settings.
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Affiliation(s)
- Sara Hooshmand
- Pharmacological Research Center of Medicinal Plants, Mashhad University of Medical Sciences, Mashhad 917794-8564, Iran; (S.H.); (A.G.)
| | - Saeid Kargozar
- Tissue Engineering Research Group (TERG), Department of Anatomy and Cell Biology, Mashhad University of Medical Sciences, Mashhad 917794-8564, Iran
| | - Ahmad Ghorbani
- Pharmacological Research Center of Medicinal Plants, Mashhad University of Medical Sciences, Mashhad 917794-8564, Iran; (S.H.); (A.G.)
| | - Majid Darroudi
- Nuclear Medicine Research Center, Mashhad University of Medical Sciences, Mashhad 917794-8564, Iran;
| | - Meysam Keshavarz
- Hamlyn Centre, Imperial College London, Bessemer Building, South Kensington Campus, Exhibition Road, Kensington, London SW7 2AZ, UK;
| | - Francesco Baino
- Institute of Materials Physics and Engineering, Applied Science and Technology Department, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy
| | - Hae-Won Kim
- Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan 31116, Korea;
- Department of Nanobiomedical Science & BK21 PLUS NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan 31116, Korea
- Department of Biomaterials Science, School of Dentistry, Dankook University, Cheonan 31116, Korea
- UCL Eastman-Korea Dental Medicine Innovation Centre, Dankook University, Cheonan 31116, Korea
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6
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Lee K, Yoon H, Ahn C, Park J, Jeon S. Strategies to improve the photocatalytic activity of TiO 2: 3D nanostructuring and heterostructuring with graphitic carbon nanomaterials. NANOSCALE 2019; 11:7025-7040. [PMID: 30920558 DOI: 10.1039/c9nr01260e] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
TiO2-based photocatalysis has been considered to be one of the most promising avenues for environmental remediation including water purification. However, several technical issues such as the limited surface area of bulk TiO2, the large band gap of TiO2, and rapid charge recombination still limit the practical application of TiO2 photocatalysts. Therefore, here we focus on two structural design strategies: (i) monolithic three-dimensional (3D) nanostructuring, and (ii) heterostructuring with graphitic carbon nanomaterials. A monolithic 3D nanostructure enables maximal surface area in a given volume and efficient reuse of the photocatalyst without recollection. Heterostructuring with carbon nanomaterials helps achieve maximal utilization of the solar spectrum and charge separation and provides efficient TiO2 photocatalysts. In this review, recent progress on TiO2 photocatalysts toward the abovementioned strategies will be summarized. Further discussion and direction will provide insights into the rational design of highly efficient TiO2 photocatalysts, and help develop advanced photocatalyst models.
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Affiliation(s)
- Kisung Lee
- Department of Materials Science and Engineering, KAIST Institute for the Nanocentury, Advanced Battery Center, KAIST, Daejeon 34141, Republic of Korea.
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Yoo SH, Lee SI, Joh HI, Lee S. Highly effective photocatalysts based on carbon nanofibers decorated with TiO2 and CdSe under visible light. J IND ENG CHEM 2018. [DOI: 10.1016/j.jiec.2018.01.034] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Wang F, Li M, Yu L, Sun F, Wang Z, Zhang L, Zeng H, Xu X. Corn-like, recoverable γ-Fe 2O 3@SiO 2@TiO 2 photocatalyst induced by magnetic dipole interactions. Sci Rep 2017; 7:6960. [PMID: 28761085 PMCID: PMC5537353 DOI: 10.1038/s41598-017-07417-z] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2017] [Accepted: 06/22/2017] [Indexed: 02/04/2023] Open
Abstract
Corn-like, γ-Fe2O3@SiO2@TiO2 core/shell heterostructures were synthesized by a modified solvothermal reduction combined with a sol-gel method. SiO2 shells were first deposited on monodisperse Fe3O4 microspheres by a sol-gel method. Fe3O4@SiO2@TiO2 corn-like heterostructures were then obtained by sequential TiO2 coating, during which the magnetic dipolar interactions induced the anisotropic self-assembly process. After annealing at 350 °C, the crystalized TiO2 enhanced photocatalytic activity, while Fe3O4 was converted to γ-Fe2O3. The corn-like γ-Fe2O3@SiO2@TiO2 photocatalyst can be recycled and reused by magnet extraction. Despite the photocatalytic activity decreased with each cycle, it can be completely recovered by moderate heating at 200 °C.
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Affiliation(s)
- Fang Wang
- School of Chemistry and Materials Science of Shanxi Normal University & Key Laboratory of Magnetic Molecules and Magnetic Information Materials of Ministry of Education, Linfen, 041004, China
- Research Institute of Materials Science of Shanxi Normal University & Collaborative Innovation Center for Shanxi Advanced Permanent Magnetic Materials and Technology, Linfen, 041004, China
| | - Manhong Li
- School of Chemistry and Materials Science of Shanxi Normal University & Key Laboratory of Magnetic Molecules and Magnetic Information Materials of Ministry of Education, Linfen, 041004, China
- Research Institute of Materials Science of Shanxi Normal University & Collaborative Innovation Center for Shanxi Advanced Permanent Magnetic Materials and Technology, Linfen, 041004, China
| | - Lifang Yu
- School of Chemistry and Materials Science of Shanxi Normal University & Key Laboratory of Magnetic Molecules and Magnetic Information Materials of Ministry of Education, Linfen, 041004, China
- Research Institute of Materials Science of Shanxi Normal University & Collaborative Innovation Center for Shanxi Advanced Permanent Magnetic Materials and Technology, Linfen, 041004, China
| | - Fan Sun
- Department of Physics, University at Buffalo, SUNY, Buffalo, NY, 14260, USA
| | - Zhuliang Wang
- School of Chemistry and Materials Science of Shanxi Normal University & Key Laboratory of Magnetic Molecules and Magnetic Information Materials of Ministry of Education, Linfen, 041004, China
- Research Institute of Materials Science of Shanxi Normal University & Collaborative Innovation Center for Shanxi Advanced Permanent Magnetic Materials and Technology, Linfen, 041004, China
| | - Lifang Zhang
- School of Chemistry and Materials Science of Shanxi Normal University & Key Laboratory of Magnetic Molecules and Magnetic Information Materials of Ministry of Education, Linfen, 041004, China
| | - Hao Zeng
- Department of Physics, University at Buffalo, SUNY, Buffalo, NY, 14260, USA.
| | - Xiaohong Xu
- School of Chemistry and Materials Science of Shanxi Normal University & Key Laboratory of Magnetic Molecules and Magnetic Information Materials of Ministry of Education, Linfen, 041004, China.
- Research Institute of Materials Science of Shanxi Normal University & Collaborative Innovation Center for Shanxi Advanced Permanent Magnetic Materials and Technology, Linfen, 041004, China.
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Chun HS, Park D, Eun Lim S, Jeong KH, Park JS, Park HJ, Kang S, Kang KS, Park HG, An HR, Huh YS, Lee YC. Two zinc-aminoclays' in-vitro cytotoxicity assessment in HeLa cells and in-vivo embryotoxicity assay in zebrafish. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2017; 137:103-112. [PMID: 27915140 DOI: 10.1016/j.ecoenv.2016.11.022] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2016] [Revised: 11/22/2016] [Accepted: 11/25/2016] [Indexed: 06/06/2023]
Abstract
Two zinc-aminoclays [ZnACs] with functionalized primary amines [(-CH2)3NH2] were prepared by a simple sol-gel reaction using cationic metal precursors of ZnCl2 and Zn(NO3)2 with 3-aminopropyl triethoxysilane [APTES] under ambient conditions. Due to the facile interaction of heavy metals with primary amine sites and Zn-related intrinsic antimicrobial activity, toxicity assays of ZnACs nanoparticles (NPs) prior to their environmental and human-health applications are essential. However, such reports remain rare. Thus, in the present study, a cell viability assay of in-vitro HeLa cells comparing ZnCl2, Zn(NO3)2 salts, and ZnO (~50nm average diameter) NPs was performed. Interestingly, compared with the ZnCl2, and Zn(NO3)2 salts, and ZnO NPs (18.73/18.12/51.49µg/mL and 18.12/15.19/46.10µg/mL of IC50 values for 24 and 48h), the two ZnACs NPs exhibited the highest toxicity (IC50 values of 21.18/18.36µg/mL and 18.37/17.09µg/mL for 24 and 48h, respectively), whose concentrations were calculated on Zn elemental composition. This might be due to the enhanced bioavailability and uptake into cells of ZnAC NPs themselves and their positively charged hydrophilicity by reactive oxygen species (ROS) generation, particularly as ZnACs exist in cationic NP's form, not in released Zn2+ ionic form (i.e., dissolved nanometal). However, in an in-vivo embryotoxicity assay in zebrafish, ZnACs and ZnO NPs showed toxic effects at 50-100µg/mL (corresponding to 37.88-75.76 of Zn wt% µg/mL). The hatching rate (%) of zebrafish was lowest for the ZnO NPs, particularly where ZnAC-[(NO3)2] is slightly more toxic than ZnAC-[Cl2]. These results are all very pertinent to the issue of ZnACs' potential applications in the environmental and biomedical fields.
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Affiliation(s)
- Hang-Suk Chun
- Department of Predictive Toxicology, Korea Institute of Toxicology (KIT), Daejeon 34114, Republic of Korea
| | - Duckshin Park
- Korea Railroad Research Institute (KRRI), 176 Cheoldobakmulkwan-ro, Uiwang-si, Gyeonggi-do 16105, Republic of Korea
| | - Song Eun Lim
- Department of BioNano Technology, Gachon University, 1342 Seongnamdaero, Sujeong-gu, Seongnam-si, Gyeonggi-do 13120, Republic of Korea
| | - Kwang-Hun Jeong
- Department of BioNano Technology, Gachon University, 1342 Seongnamdaero, Sujeong-gu, Seongnam-si, Gyeonggi-do 13120, Republic of Korea
| | - Ji-Seon Park
- Department of Predictive Toxicology, Korea Institute of Toxicology (KIT), Daejeon 34114, Republic of Korea; Human and Environmental Toxicology, School of Engineering, University of Science and Technology, Daejeon 34113, Republic of Korea
| | - Han-Jin Park
- Department of Predictive Toxicology, Korea Institute of Toxicology (KIT), Daejeon 34114, Republic of Korea
| | - Shinyoung Kang
- Department of Chemical and Biomolecular Engineering (BK21+ program), KAIST, 291 Daehakno, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Kyoung Suk Kang
- Department of Chemical and Biomolecular Engineering (BK21+ program), KAIST, 291 Daehakno, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Hyun Gyu Park
- Department of Chemical and Biomolecular Engineering (BK21+ program), KAIST, 291 Daehakno, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Ha-Rim An
- Advanced Nano-surface Research Group, Korea Basic Science Institute (KBSI), Daejeon 34133, Republic of Korea
| | - Yun Suk Huh
- Department of Biological Engineering, College of Engineering, Inha University, Incheon 402-751, Republic of Korea
| | - Young-Chul Lee
- Department of BioNano Technology, Gachon University, 1342 Seongnamdaero, Sujeong-gu, Seongnam-si, Gyeonggi-do 13120, Republic of Korea.
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Li X, Gao P, Wan P, Pei Y, Shi L, Fan B, Shen C, Xiao X, Yang K, Guo Z. Novel Bio-functional Magnesium Coating on Porous Ti6Al4V Orthopaedic Implants: In vitro and In vivo Study. Sci Rep 2017; 7:40755. [PMID: 28102294 PMCID: PMC5244406 DOI: 10.1038/srep40755] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2016] [Accepted: 12/09/2016] [Indexed: 11/09/2022] Open
Abstract
Titanium and its alloys with various porous structures are one of the most important metals used in orthopaedic implants due to favourable properties as replacement for hard tissues. However, surface modification is critical to improve the osteointegration of titanium and its alloys. In this study, a bioactive magnesium coating was successfully fabricated on porous Ti6Al4V by means of arc ion plating, which was proved with fine grain size and high film/substrate adhesion. The surface composition and morphology were characterized by X-ray diffraction and SEM equipped with energy dispersive spectroscopy. Furthermore, the in vitro study of cytotoxicity and proliferation of MC3T3-E1 cells showed that magnesium coated porous Ti6Al4V had suitable degradation and biocompatibility. Moreover, the in vivo studies including fluorescent labelling, micro-computed tomography analysis scan and Van-Gieson staining of histological sections indicated that magnesium coated porous Ti6Al4V could significantly promote bone regeneration in rabbit femoral condylar defects after implantation for 4 and 8 weeks, and has better osteogenesis and osteointegration than the bare porous Ti6Al4V. Therefore, it is expected that this bioactive magnesium coating on porous Ti6Al4V scaffolds with improved osteointegration and osteogenesis functions can be used for orthopedic applications.
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Affiliation(s)
- Xiaokang Li
- Department of Orthopaedics, Xijing Hospital, Fourth Military Medical University, Xi'an, 710032, China
| | - Peng Gao
- Department of Orthopaedics, Xijing Hospital, Fourth Military Medical University, Xi'an, 710032, China
| | - Peng Wan
- Institute of Metal Research, Chinese Academy of Science, Shenyang 110016, China
| | - Yifeng Pei
- Department of Orthopaedics, Xijing Hospital, Fourth Military Medical University, Xi'an, 710032, China
| | - Lei Shi
- Department of Orthopaedics, Xijing Hospital, Fourth Military Medical University, Xi'an, 710032, China
| | - Bo Fan
- Department of Orthopaedics, Xijing Hospital, Fourth Military Medical University, Xi'an, 710032, China
| | - Chao Shen
- Department of Orthopaedics, Xijing Hospital, Fourth Military Medical University, Xi'an, 710032, China
| | - Xin Xiao
- Department of Orthopaedics, Xijing Hospital, Fourth Military Medical University, Xi'an, 710032, China
| | - Ke Yang
- Institute of Metal Research, Chinese Academy of Science, Shenyang 110016, China
| | - Zheng Guo
- Department of Orthopaedics, Xijing Hospital, Fourth Military Medical University, Xi'an, 710032, China
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11
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Sun Q, Peng YP, Chen H, Chang KL, Qiu YN, Lai SW. Photoelectrochemical oxidation of ibuprofen via Cu2O-doped TiO2 nanotube arrays. JOURNAL OF HAZARDOUS MATERIALS 2016; 319:121-129. [PMID: 27021261 DOI: 10.1016/j.jhazmat.2016.02.078] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2015] [Revised: 02/25/2016] [Accepted: 02/27/2016] [Indexed: 06/05/2023]
Abstract
A p-n junction based Cu2O-doped TiO2 nanotube arrays (Cu2O-TNAs) were synthesized and used as a working anode in a photoelectrochemical (PEC) system. The results revealed that the Cu2O-TNAs were dominated by the anatase phase and responded significantly to visible light. XPS analyses indicated that with an amount of 24.79% Cu doping into the structure, the band gap of Cu2O-TNAs was greatly reduced. SEM images revealed that the supported TiO2 nanotubes had diameters of approximately 80nm and lengths of about 2.63μm. Upon doping with Cu2O, the TiO2 nanotubes maintained their structural integrity, exhibiting no significant morphological change, favoring PEC applications. Under illumination, the photocurrent from Cu2O/TNAs was 2.4 times larger than that from TNAs, implying that doping with Cu2O significantly improved electron mobility by reducing the rate of recombination of electron-hole pairs. The EIS and Bode plot revealed that the estimated electron lifetimes, τel, of TNAs and Cu2O/TNAs were 6.91 and 26.26ms, respectively. The efficiencies of degradation of Ibuprofen by photoelectrochemical, photocatalytic (PC), electrochemical (EC) and photolytic (P) methods were measured.
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Affiliation(s)
- Qiannan Sun
- College of Environment and Energy, South China University of Technology, Guangzhou, China
| | - Yen-Ping Peng
- Department of Environmental Science and Engineering, Tunghai University, Taichung, Taiwan.
| | - Hanlin Chen
- College of Environment and Energy, South China University of Technology, Guangzhou, China
| | - Ken-Lin Chang
- School of Environmental Science and Engineering and Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou, 51006 China
| | - Yang-Neng Qiu
- Department of Environmental Science and Engineering, Tunghai University, Taichung, Taiwan
| | - Shiau-Wu Lai
- Department of Environmental Science and Engineering, Tunghai University, Taichung, Taiwan
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12
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Advanced nanoporous TiO2 photocatalysts by hydrogen plasma for efficient solar-light photocatalytic application. Sci Rep 2016; 6:29683. [PMID: 27406992 PMCID: PMC4942796 DOI: 10.1038/srep29683] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2016] [Accepted: 06/20/2016] [Indexed: 01/02/2023] Open
Abstract
We report an effect involving hydrogen (H2)-plasma-treated nanoporous TiO2(H-TiO2) photocatalysts that improve photocatalytic performance under solar-light illumination. H-TiO2 photocatalysts were prepared by application of hydrogen plasma of assynthesized TiO2(a-TiO2) without annealing process. Compared with the a-TiO2, the H-TiO2 exhibited high anatase/brookite bicrystallinity and a porous structure. Our study demonstrated that H2 plasma is a simple strategy to fabricate H-TiO2 covering a large surface area that offers many active sites for the extension of the adsorption spectra from ultraviolet (UV) to visible range. Notably, the H-TiO2 showed strong ·OH free-radical generation on the TiO2 surface under both UV- and visible-light irradiation with a large responsive surface area, which enhanced photocatalytic efficiency. Under solar-light irradiation, the optimized H-TiO2 120(H2-plasma treatment time: 120 min) photocatalysts showed unprecedentedly excellent removal capability for phenol (Ph), reactive black 5(RB 5), rhodamine B (Rho B) and methylene blue (MB) - approximately four-times higher than those of the other photocatalysts (a-TiO2 and P25) - resulting in complete purification of the water. Such well-purified water (>90%) can utilize culturing of cervical cancer cells (HeLa), breast cancer cells (MCF-7), and keratinocyte cells (HaCaT) while showing minimal cytotoxicity. Significantly, H-TiO2 photocatalysts can be mass-produced and easily processed at room temperature. We believe this novel method can find important environmental and biomedical applications.
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Wang M, Yang G, Jin P, Tang H, Wang H, Chen Y. Highly hydrophilic poly(vinylidene fluoride)/meso-titania hybrid mesoporous membrane for photocatalytic membrane reactor in water. Sci Rep 2016; 6:19148. [PMID: 26754440 PMCID: PMC4709575 DOI: 10.1038/srep19148] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2015] [Accepted: 12/07/2015] [Indexed: 01/29/2023] Open
Abstract
The high hydrophobicity of poly(vinylidene fluoride) (PVDF) membrane remains an obstacle to be applied in some purification processes of water or wastewater. Herein, a highly hydrophilic hybrid mesoporous titania membrane composed of mesoporous anatase titania (meso-TiO2) materials inside the three-dimensional (3D) macropores of PVDF membrane was successfully prepared by using the dual-templated synthesis method combined with solvent extraction and applied as the photocatalytic membrane reactor for the photodegredation of organic dye in water. The structure and the properties of as-prepared hybrid membranes were characterized by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), transmission electron microscopy (TEM), X-ray diffraction (XRD), nitrogen adsorption-desorption and contact angle measurements. It was found that the hydrophilicity of PVDF membrane can be significantly improved by filling mesoporous TiO2 inside the 3D macropores of PVDF membrane. Moreover, such a PVDF/meso-TiO2 hybrid membrane exhibits promising photocatalytic degradation of dye in water due to the existence of mesoporous anatase TiO2 materials inside PVDF membrane. This study provides a new strategy to simultaneously introduce hydrophilicity and some desirable properties into PVDF and other hydrophobic membranes.
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Affiliation(s)
- Meng Wang
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, China
| | - Guang Yang
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, China
| | - Peng Jin
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, China
| | - Hao Tang
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, China
| | - Huanhuan Wang
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, China
| | - Yong Chen
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, China
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Srinivas B, Kumar BG, Muralidharan K. Stabilizer free copper sulphide nanostructures for rapid photocatalytic decomposition of rhodamine B. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.molcata.2015.08.028] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Young Park S, Uk Lee H, Lee YC, Choi S, Hyun Cho D, Sik Kim H, Bang S, Seo S, Chang Lee S, Won J, Son BC, Yang M, Lee J. Eco-friendly carbon-nanodot-based fluorescent paints for advanced photocatalytic systems. Sci Rep 2015; 5:12420. [PMID: 26201431 PMCID: PMC5378878 DOI: 10.1038/srep12420] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2015] [Accepted: 06/26/2015] [Indexed: 12/28/2022] Open
Abstract
Fluorescent carbon nanomaterials, especially zero-dimensional (0D) carbon nanodots (CDs), are widely used in broad biological and optoelectronic applications. CDs have unique characteristics such as strong fluorescence, biocompatibility, sun-light response, and capability of mass-production. Beyond the previous green CD obtained from harmful natural substances, we report a new type of fluid-based fluorescent CD paints (C-paints) derived from polyethylene glycol (PEG; via simple ultrasound irradiation at room temperatures) and produced in quantum yields of up to ~14%. Additionally, C-paints possess a strong, UV- and visible-light-responsive photoluminescent (PL) property. Most especially, C-paints, by incorporation into a photocatalytic system, show additional roles in the emission of fluorescent light for activation of TiO2 nanoparticles (NPs) and the resultant detoxification of most organic dyes, thus further enabling embarkation in advanced water purification.
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Affiliation(s)
- So Young Park
- Advanced Nano-Surface Research Group Korea Basic Science Institute (KBSI), Daejeon 305-333, Republic of Korea
| | - Hyun Uk Lee
- Advanced Nano-Surface Research Group Korea Basic Science Institute (KBSI), Daejeon 305-333, Republic of Korea
| | - Young-Chul Lee
- Department of BioNano Technology, Gachon University, Gyeonggi-do 461-701, Republic of Korea
| | - Saehae Choi
- Sustainable Bioresource Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon 305-806, Republic of Korea
| | - Dae Hyun Cho
- Sustainable Bioresource Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon 305-806, Republic of Korea
| | - Hee Sik Kim
- Sustainable Bioresource Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon 305-806, Republic of Korea
| | - Sunghee Bang
- Department of Engineering (Nanotechnology Engineering), University of Waterloo 200 University Avenue West, Waterloo, Ontario, N2L 3G1, Canada
| | - Soonjoo Seo
- Advanced Nano-Surface Research Group Korea Basic Science Institute (KBSI), Daejeon 305-333, Republic of Korea
| | - Soon Chang Lee
- Department of Applied Chemistry and Biological Engineering, Chungnam National University, Daejeon 305-764, Republic of Korea
| | - Jonghan Won
- Advanced Nano-Surface Research Group Korea Basic Science Institute (KBSI), Daejeon 305-333, Republic of Korea
| | - Byung-Chul Son
- Korea Advanced Institute of Science and Technology (KAIST), Research Analysis Center, Daejeon 305-701, Republic of Korea
| | - Mino Yang
- Korea Basic Science Institute (KBSI), Daejeon 305-333, Republic of Korea
| | - Jouhahn Lee
- Advanced Nano-Surface Research Group Korea Basic Science Institute (KBSI), Daejeon 305-333, Republic of Korea
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Stable semiconductor black phosphorus (BP)@titanium dioxide (TiO2) hybrid photocatalysts. Sci Rep 2015; 5:8691. [PMID: 25732720 PMCID: PMC4346807 DOI: 10.1038/srep08691] [Citation(s) in RCA: 202] [Impact Index Per Article: 22.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2014] [Accepted: 02/02/2015] [Indexed: 12/17/2022] Open
Abstract
Over the past few decades, two-dimensional (2D) and layered materials have emerged as new fields. Due to the zero-band-gap nature of graphene and the low photocatalytic performance of MoS2, more advanced semiconducting 2D materials have been prompted. As a result, semiconductor black phosphorus (BP) is a derived cutting-edge post-graphene contender for nanoelectrical application, because of its direct-band-gap nature. For the first time, we report on robust BP@TiO2 hybrid photocatalysts offering enhanced photocatalytic performance under light irradiation in environmental and biomedical fields, with negligible affected on temperature and pH conditions, as compared with MoS2@TiO2 prepared by the identical synthesis method. Remarkably, in contrast to pure few layered BP, which, due to its intrinsic sensitivity to oxygen and humidity was readily dissolved after just several uses, the BP@TiO2 hybrid photocatalysts showed a ~92% photocatalytic activity after 15 runs. Thus, metal-oxide-stabilized BP photocatalysts can be practically applied as a promising alternative to graphene and MoS2.
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