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Zhang X, Song Y, Gong H, Wu C, Wang B, Chen W, Hu J, Xiang H, Zhang K, Sun M. Neurotoxicity of Titanium Dioxide Nanoparticles: A Comprehensive Review. Int J Nanomedicine 2023; 18:7183-7204. [PMID: 38076727 PMCID: PMC10710240 DOI: 10.2147/ijn.s442801] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Accepted: 11/25/2023] [Indexed: 12/18/2023] Open
Abstract
The increasing use of titanium dioxide nanoparticles (TiO2 NPs) across various fields has led to a growing concern regarding their environmental contamination and inevitable human exposure. Consequently, significant research efforts have been directed toward understanding the effects of TiO2 NPs on both humans and the environment. Notably, TiO2 NPs exposure has been associated with multiple impairments of the nervous system. This review aims to provide an overview of the documented neurotoxic effects of TiO2 NPs in different species and in vitro models. Following exposure, TiO2 NPs can reach the brain, although the specific mechanism and quantity of particles that cross the blood-brain barrier (BBB) remain unclear. Exposure to TiO2 NPs has been shown to induce oxidative stress, promote neuroinflammation, disrupt brain biochemistry, and ultimately impair neuronal function and structure. Subsequent neuronal damage may contribute to various behavioral disorders and play a significant role in the onset and progression of neurodevelopmental or neurodegenerative diseases. Moreover, the neurotoxic potential of TiO2 NPs can be influenced by various factors, including exposure characteristics and the physicochemical properties of the TiO2 NPs. However, a systematic comparison of the neurotoxic effects of TiO2 NPs with different characteristics under various exposure conditions is still lacking. Additionally, our understanding of the underlying neurotoxic mechanisms exerted by TiO2 NPs remains incomplete and fragmented. Given these knowledge gaps, it is imperative to further investigate the neurotoxic hazards and risks associated with exposure to TiO2 NPs.
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Affiliation(s)
- Xing Zhang
- Department of Toxicology, School of Public Health, Nanjing Medical University, Nanjing, Jiangsu, People’s Republic of China
| | - Yuanyuan Song
- Department of Toxicology, School of Public Health, Nanjing Medical University, Nanjing, Jiangsu, People’s Republic of China
| | - Hongyang Gong
- Department of Toxicology, School of Public Health, Nanjing Medical University, Nanjing, Jiangsu, People’s Republic of China
| | - Chunyan Wu
- Department of Toxicology, School of Public Health, Nanjing Medical University, Nanjing, Jiangsu, People’s Republic of China
| | - Binquan Wang
- Department of Toxicology, School of Public Health, Nanjing Medical University, Nanjing, Jiangsu, People’s Republic of China
| | - Wenxuan Chen
- The Second Clinical Medical School, Nanjing Medical University, Nanjing, Jiangsu, People’s Republic of China
| | - Jiawei Hu
- The Second Clinical Medical School, Nanjing Medical University, Nanjing, Jiangsu, People’s Republic of China
| | - Hanhui Xiang
- The Second Clinical Medical School, Nanjing Medical University, Nanjing, Jiangsu, People’s Republic of China
| | - Ke Zhang
- Department of Toxicology, School of Public Health, Nanjing Medical University, Nanjing, Jiangsu, People’s Republic of China
| | - Mingkuan Sun
- Department of Toxicology, School of Public Health, Nanjing Medical University, Nanjing, Jiangsu, People’s Republic of China
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Nadtochiy AB, Gorb AM, Gorelov BM, Polovina OI, Korotchenkov O, Schlosser V. Model Approach to Thermal Conductivity in Hybrid Graphene-Polymer Nanocomposites. Molecules 2023; 28:7343. [PMID: 37959762 PMCID: PMC10647783 DOI: 10.3390/molecules28217343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Revised: 10/24/2023] [Accepted: 10/26/2023] [Indexed: 11/15/2023] Open
Abstract
The thermal conductivity of epoxy nanocomposites filled with self-assembled hybrid nanoparticles composed of multilayered graphene nanoplatelets and anatase nanoparticles was described using an analytical model based on the effective medium approximation with a reasonable amount of input data. The proposed effective thickness approach allowed for the simplification of the thermal conductivity simulations in hybrid graphene@anatase TiO2 nanosheets by including the phenomenological thermal boundary resistance. The sensitivity of the modeled thermal conductivity to the geometrical and material parameters of filling particles and the host polymer matrix, filler's mass concentration, self-assembling degree, and Kapitza thermal boundary resistances at emerging interfaces was numerically evaluated. A fair agreement of the calculated and measured room-temperature thermal conductivity was obtained.
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Affiliation(s)
- Andriy B. Nadtochiy
- Faculty of Physics, Taras Shevchenko National University of Kyiv, 01601 Kyiv, Ukraine; (A.B.N.); (A.M.G.); (O.I.P.); (O.K.)
| | - Alla M. Gorb
- Faculty of Physics, Taras Shevchenko National University of Kyiv, 01601 Kyiv, Ukraine; (A.B.N.); (A.M.G.); (O.I.P.); (O.K.)
| | - Borys M. Gorelov
- Chuiko Institute of Surface Chemistry, NAS of Ukraine, 17 General Naumov Str., 03164 Kyiv, Ukraine;
| | - Oleksiy I. Polovina
- Faculty of Physics, Taras Shevchenko National University of Kyiv, 01601 Kyiv, Ukraine; (A.B.N.); (A.M.G.); (O.I.P.); (O.K.)
| | - Oleg Korotchenkov
- Faculty of Physics, Taras Shevchenko National University of Kyiv, 01601 Kyiv, Ukraine; (A.B.N.); (A.M.G.); (O.I.P.); (O.K.)
- Erwin Schrödinger International Institute for Mathematics and Physics, University of Vienna, 1090 Vienna, Austria
| | - Viktor Schlosser
- Department of Electronic Properties of Materials, Faculty of Physics, University of Vienna, 1090 Wien, Austria
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Al-Senani GM, Nasr M, Zayed M, Ali SS, Alshaikh H, Abd El-Salam HM, Shaban M. Fabrication of PES Modified by TiO 2/Na 2Ti 3O 7 Nanocomposite Mixed-Matrix Woven Membrane for Enhanced Performance of Forward Osmosis: Influence of Membrane Orientation and Feed Solutions. MEMBRANES 2023; 13:654. [PMID: 37505020 PMCID: PMC10383846 DOI: 10.3390/membranes13070654] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Revised: 06/25/2023] [Accepted: 06/27/2023] [Indexed: 07/29/2023]
Abstract
Water treatment is regarded as one of the essential elements of sustainability. To lower the cost of treatment, the wastewater volume is reduced via the osmotic process. Here, mixed-matrix woven forward osmosis (MMWFO) PES membranes modified by a TiO2/Na2Ti3O7 (TNT) nanocomposite were fabricated for treating water from different sources. Various techniques were used to characterize the TNT nanocomposite. The crystal structure of TNT is a mix of monoclinic Na2Ti3O7 and anorthic TiO2 with a preferred orientation of (2-11). The SEM image shows that the surface morphology of the TNT nanocomposite is a forked nano-fur with varying sizes regularly distributed throughout the sample. The impact of TNT wt.% on membrane surface morphologies, functional groups, hydrophilicity, and performance was investigated. Additionally, using distilled water (DW) as the feed solution (FS), the effects of various NaCl concentrations, draw solutions, and membrane orientations on the performance of the mixed-matrix membranes were tested. Different water samples obtained from various sources were treated as the FS using the optimized PES/TNT (0.01 wt.%) MMWFO membrane. Using textile effluent as the FS, the impact of various NaCl DS concentrations on the permeated water volume was investigated. The results show that the MMWFO membrane generated with the TNT nanocomposite at a 0.01 wt.% ratio performed better in FO mode. After 30 min of use with 1 M NaCl and various sources of water as the FS, the optimized MMWFO membrane provided a steady water flow and exhibited antifouling behavior. DW performed better than other water types whenever it was used owing to its greater flow (136 LMH) and volume reduction (52%). Tap water (TW), textile industrial wastewater (TIWW), gray water (GW), and municipal wastewater (MW) showed volume reductions of 41%, 34%, 33%, and 31.9%, respectively. Additionally, when utilizing NaCl as the DS and TIWW as the FS, 1 M NaCl resulted in more permeated water than 0.25 M and 0.5 M, yet a higher volume reduction of 41% was obtained.
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Affiliation(s)
- Ghadah M Al-Senani
- Department of Chemistry, College of Science, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia
| | - Mervat Nasr
- Nanophotonics and Applications (NPA) Lab, Physics Department, Faculty of Science, Beni-Suef University, Beni-Suef 62514, Egypt
- Chemistry Department, Faculty of Science, Beni-Suef University, Beni-Suef 62514, Egypt
| | - Mohamed Zayed
- Nanophotonics and Applications (NPA) Lab, Physics Department, Faculty of Science, Beni-Suef University, Beni-Suef 62514, Egypt
| | - Sahar S Ali
- Chemical Engineering and Pilot-Plant Department, National Research Center, Dokki, Cairo 12622, Egypt
| | - Hind Alshaikh
- Chemistry Department, Science and Arts College, Rabigh Campus, King Abdulaziz University, P.O. Box 344, Jeddah 21911, Saudi Arabia
| | - Hanafy M Abd El-Salam
- Chemistry Department, Faculty of Science, Beni-Suef University, Beni-Suef 62514, Egypt
| | - Mohamed Shaban
- Nanophotonics and Applications (NPA) Lab, Physics Department, Faculty of Science, Beni-Suef University, Beni-Suef 62514, Egypt
- Department of Physics, Faculty of Science, Islamic University of Madinah, P.O. Box 170, Madinah 42351, Saudi Arabia
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Breisch M, Olejnik M, Loza K, Prymak O, Rosenkranz N, Bünger J, Sengstock C, Köller M, Westphal G, Epple M. Cell-Biological Response and Sub-Toxic Inflammatory Effects of Titanium Dioxide Particles with Defined Polymorphic Phase, Size, and Shape. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:nano13101621. [PMID: 37242038 DOI: 10.3390/nano13101621] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Revised: 05/03/2023] [Accepted: 05/10/2023] [Indexed: 05/28/2023]
Abstract
Six types of titanium dioxide particles with defined size, shape, and crystal structure (polymorphic form) were prepared: nanorods (70 × 25 nm2), rutile sub-microrods (190 × 40 nm2), rutile microspheres (620 nm), anatase nanospheres (100 nm), anatase microspheres (510 nm), and amorphous titania microspheres (620 nm). All particles were characterized by scanning electron microscopy, X-ray powder diffraction, dynamic light scattering, infrared spectroscopy, and UV spectroscopy. The sub-toxic cell-biological response to these particles by NR8383 macrophages was assessed. All particle types were taken up well by the cells. The cytotoxicity and the induction of reactive oxygen species (ROS) were negligible for all particles up to a dose of 100 µg mL-1, except for rutile microspheres which had a very rough surface in contrast to anatase and amorphous titania microspheres. The particle-induced cell migration assay (PICMA; based on chemotaxis) of all titanium dioxide particles was comparable to the effect of control silica nanoparticles (50 nm, uncoated, agglomerated) but did not show a trend with respect to particle size, shape, or crystal structure. The coating with carboxymethylcellulose (CMC) had no significant biological effect. However, the rough surface of rutile microspheres clearly induced pro-inflammatory cell reactions that were not predictable by the primary particle size alone.
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Affiliation(s)
- Marina Breisch
- BG University Hospital Bergmannsheil, Surgical Research, Ruhr University of Bochum, 44789 Bochum, Germany
| | - Mateusz Olejnik
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, 45117 Essen, Germany
| | - Kateryna Loza
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, 45117 Essen, Germany
| | - Oleg Prymak
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, 45117 Essen, Germany
| | - Nina Rosenkranz
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance (IPA), Institute of the Ruhr University of Bochum, 44789 Bochum, Germany
| | - Jürgen Bünger
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance (IPA), Institute of the Ruhr University of Bochum, 44789 Bochum, Germany
| | - Christina Sengstock
- BG University Hospital Bergmannsheil, Surgical Research, Ruhr University of Bochum, 44789 Bochum, Germany
| | - Manfred Köller
- BG University Hospital Bergmannsheil, Surgical Research, Ruhr University of Bochum, 44789 Bochum, Germany
| | - Götz Westphal
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance (IPA), Institute of the Ruhr University of Bochum, 44789 Bochum, Germany
| | - Matthias Epple
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, 45117 Essen, Germany
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Layan E, Gupta J, Ly I, Nallet F, Bentaleb A, Laurichesse E, Vallée R, Blin JL, Lebeau B, Louërat F, Le Bechec M, Moonen P, Toupance T, Pigot T, Backov R. TiO 2-SiO 2 Self-Standing Materials bearing Hierarchical Porosity: MUB-200(x) Series toward 3D-Efficient VOC Photoabatement Properties. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:3871-3882. [PMID: 36878006 DOI: 10.1021/acs.langmuir.2c03062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Three-dimensional photoactive self-standing porous materials have been synthesized through the integration of soft chemistry and colloids (emulsions, lyotrope mesophases, and P25 titania nanoparticles). Final multiscale porous ceramics bear 700-1000 m2 g-1 of micromesoporosity depending on the P25 nanoparticle contents. The applied thermal treatment does not affect the P25 anatase/rutile allotropic phase ratio. Photonic investigations correlated with the foams' morphologies suggest that the larger amount of TiO2 that is introduced, the larger the walls' density and the smaller the mean size of the void macroscopic diameters, with both effects inducing a reduction of the photon transport mean free path (lt) with the P25 content increase. A light penetration depth in the range of 6 mm is reached, thus depicting real 3D photonic scavenger behavior. The 3D photocatalytic properties of the MUB-200(x) series, studied in a dynamic "flow-through" configuration, show that the highest photoactivity (concentration of acetone ablated and concentration of CO2 formed) is obtained with the highest monolith height (volume) while providing an average of 75% mineralization. These experimental results validate the fact that these materials, bearing 3D photoactivity, are paving the path for air purification operating with self-standing porous monolith-type materials, which are much easier to handle than powders. As such, the photocatalytic systems can now be advantageously miniaturized, thereby offering indoor air treatment within vehicles/homes while drastically limiting the associated encumbrance. This volumetric counterintuitive acting mode for light-induced reactions may find other relevant advanced applications for photoinduced water splitting, solar fuel, and dye-sensitized solar cells while both optimizing photon scavenging and opening the path for the miniaturization of the processes where encumbrance or a foot-print penalty would be advantageously circumvented.
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Affiliation(s)
- Elodie Layan
- Université de Bordeaux, CRPP-UMR CNRS 5031, 115 Avenue Albert Schweitzer, 33600 Pessac, France
| | - Juhi Gupta
- Université de Bordeaux, CRPP-UMR CNRS 5031, 115 Avenue Albert Schweitzer, 33600 Pessac, France
| | - Isabelle Ly
- Université de Bordeaux, CRPP-UMR CNRS 5031, 115 Avenue Albert Schweitzer, 33600 Pessac, France
| | - Frédéric Nallet
- Université de Bordeaux, CRPP-UMR CNRS 5031, 115 Avenue Albert Schweitzer, 33600 Pessac, France
| | - Ahmed Bentaleb
- Université de Bordeaux, CRPP-UMR CNRS 5031, 115 Avenue Albert Schweitzer, 33600 Pessac, France
| | - Eric Laurichesse
- Université de Bordeaux, CRPP-UMR CNRS 5031, 115 Avenue Albert Schweitzer, 33600 Pessac, France
| | - Renaud Vallée
- Université de Bordeaux, CRPP-UMR CNRS 5031, 115 Avenue Albert Schweitzer, 33600 Pessac, France
| | - Jean-Luc Blin
- Institut Jean Barriol, UMR CNRS 7053 L2CM, Université de Lorraine, Faculté des Sciences et Technologies, BP 70239, 54506 Vandoeuvre lès Nancy cedex, France
| | - Bénédicte Lebeau
- CNRS - Institut de Science des Matériaux de Mulhouse (IS2M), 15 rue Jean Starcky - BP 2488, 68057 Mulhouse cedex, France
| | - Frédéric Louërat
- Université de Bordeaux, CRPP-UMR CNRS 5031, 115 Avenue Albert Schweitzer, 33600 Pessac, France
| | - Mickael Le Bechec
- Université de Pau et des Pays de l'Adour, E2S UPPA, CNRS, IMT Mines Ales, IPREM, 64000 Pau, France
| | - Peter Moonen
- Université de Pau et des Pays de l'Adour, E2S UPPA, CNRS, Total, LFCR, 64000 Pau, France
- Université de Pau et des Pays de l'Adour, E2S UPPA, CNRS, DMEX, 64000 Pau, France
| | - Thierry Toupance
- Université de Bordeaux, Institut des Sciences Moléculaires CNRS UMR 5255, Bât. A12, 351 Cours de la Libération, 33405 Talence cedex, France
| | - Thierry Pigot
- Université de Pau et des Pays de l'Adour, E2S UPPA, CNRS, IMT Mines Ales, IPREM, 64000 Pau, France
| | - Rénal Backov
- Université de Bordeaux, CRPP-UMR CNRS 5031, 115 Avenue Albert Schweitzer, 33600 Pessac, France
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Ammendolia MG, De Berardis B. Nanoparticle Impact on the Bacterial Adaptation: Focus on Nano-Titania. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:3616. [PMID: 36296806 PMCID: PMC9609019 DOI: 10.3390/nano12203616] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Revised: 09/29/2022] [Accepted: 10/11/2022] [Indexed: 06/16/2023]
Abstract
Titanium dioxide nanoparticles (nano-titania/TiO2 NPs) are used in different fields and applications. However, the release of TiO2 NPs into the environment has raised concerns about their biosafety and biosecurity. In light of the evidence that TiO2 NPs could be used to counteract antibiotic resistance, they have been investigated for their antibacterial activity. Studies reported so far indicate a good performance of TiO2 NPs against bacteria, alone or in combination with antibiotics. However, bacteria are able to invoke multiple response mechanisms in an attempt to adapt to TiO2 NPs. Bacterial adaption arises from global changes in metabolic pathways via the modulation of regulatory networks and can be related to single-cell or multicellular communities. This review describes how the impact of TiO2 NPs on bacteria leads to several changes in microorganisms, mainly during long-term exposure, that can evolve towards adaptation and/or increased virulence. Strategies employed by bacteria to cope with TiO2 NPs suggest that their use as an antibacterial agent has still to be extensively investigated from the point of view of the risk of adaptation, to prevent the development of resistance. At the same time, possible effects on increased virulence following bacterial target modifications by TiO2 NPs on cells or tissues have to be considered.
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Ashraf T, Alfryyan N, Nasr M, Ahmed SA, Shaban M. Removal of Scale-Forming Ions and Oil Traces from Oil Field Produced Water Using Graphene Oxide/Polyethersulfone and TiO 2 Nanoribbons/Polyethersulfone Nanofiltration Membranes. Polymers (Basel) 2022; 14:2572. [PMID: 35808619 PMCID: PMC9269001 DOI: 10.3390/polym14132572] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Revised: 06/02/2022] [Accepted: 06/07/2022] [Indexed: 12/07/2022] Open
Abstract
Treatment of produced water in oil fields has become a tough challenge for oil producers. Nanofiltration, a promising method for water treatment, has been proposed as a solution. The phase inversion technique was used for the synthesis of nanofiltration membranes of polyethersulfone embedded with graphene oxide nanoparticles and polyethersulfone embedded with titanium nanoribbons. As a realistic situation, water samples taken from the oil field were filtered using synthetic membranes at an operating pressure of 0.3 MPa. Physiochemical properties such as water flux, membrane morphology, flux recovery ratio, pore size and hydrophilicity were investigated. Additionally, filtration efficiency for removal of constituent ions, oil traces in water removal, and fouling tendency were evaluated. The constituent ions of produced water act as the scaling agent which threatens the blocking of the reservoir bores of the disposal wells. Adding graphene oxide (GO) and titanium nanoribbons (TNR) to polyethersulfone (PES) enhanced filtration efficiency, water flux, and anti-fouling properties while also boosting hydrophilicity and porosity. The PES-0.7GO membrane has the best filtering performance, followed by the PES-0.7TNR and pure-PES membranes, with chloride salt rejection rates of 81%, 78%, and 35%; oil rejection rates of 88%, 85%, and 71%; and water fluxes of 85, 82, and 42.5 kg/m2 h, respectively. Because of its higher hydrophilicity and physicochemical qualities, the PES-0.7GO membrane outperformed the PES-0.7TNR membrane. Nanofiltration membranes embedded with nanomaterial described in this work revealed encouraging long-term performance for oil-in-water trace separation and scaling agent removal.
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Affiliation(s)
- Tarek Ashraf
- Chemistry Department, Faculty of Science, Beni-Suef University, Beni-Suef 62514, Egypt; (T.A.); (M.N.); (S.A.A.)
- Nanophotonics and Applications (NPA) Lab, Physics Department, Faculty of Science, Beni-Suef University, Beni-Suef 62514, Egypt
| | - Nada Alfryyan
- Department of Physics, College of Sciences, Princess Nourah Bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia
| | - Mervat Nasr
- Chemistry Department, Faculty of Science, Beni-Suef University, Beni-Suef 62514, Egypt; (T.A.); (M.N.); (S.A.A.)
- Nanophotonics and Applications (NPA) Lab, Physics Department, Faculty of Science, Beni-Suef University, Beni-Suef 62514, Egypt
| | - Sayed A. Ahmed
- Chemistry Department, Faculty of Science, Beni-Suef University, Beni-Suef 62514, Egypt; (T.A.); (M.N.); (S.A.A.)
| | - Mohamed Shaban
- Nanophotonics and Applications (NPA) Lab, Physics Department, Faculty of Science, Beni-Suef University, Beni-Suef 62514, Egypt
- Department of Physics, Faculty of Science, Islamic University of Madinah, Almadinah Almonawara 42351, Saudi Arabia
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Breuch R, Klein D, Moers C, Siefke E, Wickleder C, Kaul P. Development of Gold Nanoparticle-Based SERS Substrates on TiO2-Coating to Reduce the Coffee Ring Effect. NANOMATERIALS 2022; 12:nano12050860. [PMID: 35269348 PMCID: PMC8912524 DOI: 10.3390/nano12050860] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Revised: 02/27/2022] [Accepted: 03/01/2022] [Indexed: 02/05/2023]
Abstract
Hydrophilic surface-enhanced Raman spectroscopy (SERS) substrates were prepared by a combination of TiO2-coatings of aluminium plates through a direct titanium tetraisopropoxide (TTIP) coating and drop coated by synthesised gold nanoparticles (AuNPs). Differences between the wettability of the untreated substrates, the slowly dried Ti(OH)4 substrates and calcinated as well as plasma treated TiO2 substrates were analysed by water contact angle (WCA) measurements. The hydrophilic behaviour of the developed substrates helped to improve the distribution of the AuNPs, which reflects in overall higher lateral SERS enhancement. Surface enhancement of the substrates was tested with target molecule rhodamine 6G (R6G) and a fibre-coupled 638 nm Raman spectrometer. Additionally, the morphology of the substrates was characterised using scanning electron microscopy (SEM) and Raman microscopy. The studies showed a reduced influence of the coffee ring effect on the particle distribution, resulting in a more broadly distributed edge region, which increased the spatial reproducibility of the measured SERS signal in the surface-enhanced Raman mapping measurements on mm scale.
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Affiliation(s)
- René Breuch
- Institute of Safety and Security Research, University of Applied Sciences Bonn-Rhein-Sieg, von-Liebig-Str. 20, 53359 Rheinbach, Germany; (D.K.); (C.M.); (E.S.)
- Correspondence: (R.B.); (P.K.)
| | - Daniel Klein
- Institute of Safety and Security Research, University of Applied Sciences Bonn-Rhein-Sieg, von-Liebig-Str. 20, 53359 Rheinbach, Germany; (D.K.); (C.M.); (E.S.)
| | - Cassandra Moers
- Institute of Safety and Security Research, University of Applied Sciences Bonn-Rhein-Sieg, von-Liebig-Str. 20, 53359 Rheinbach, Germany; (D.K.); (C.M.); (E.S.)
| | - Eleni Siefke
- Institute of Safety and Security Research, University of Applied Sciences Bonn-Rhein-Sieg, von-Liebig-Str. 20, 53359 Rheinbach, Germany; (D.K.); (C.M.); (E.S.)
| | - Claudia Wickleder
- Inorganic Chemistry, Department Chemie and Biologie, Cµ—Center for Micro- and Nanochemistry and (Bio)Technology, Faculty of Science and Technology, University of Siegen, Adolf-Reichwein-Str., 57068 Siegen, Germany;
| | - Peter Kaul
- Institute of Safety and Security Research, University of Applied Sciences Bonn-Rhein-Sieg, von-Liebig-Str. 20, 53359 Rheinbach, Germany; (D.K.); (C.M.); (E.S.)
- Correspondence: (R.B.); (P.K.)
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9
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Birsan IG, Pintilie SC, Pintilie LG, Lazar AL, Circiumaru A, Balta S. New Understanding of the Difference in Filtration Performance between Anatase and Rutile TiO 2 Nanoparticles through Blending into Ultrafiltration PSF Membranes. MEMBRANES 2021; 11:membranes11110841. [PMID: 34832069 PMCID: PMC8625676 DOI: 10.3390/membranes11110841] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Revised: 10/25/2021] [Accepted: 10/26/2021] [Indexed: 12/04/2022]
Abstract
The blending of nanomaterials into a polymeric matrix is a method known for its ability, under certain circumstances, to lead to an improvement in membrane properties. TiO2 nanoparticles have been used in membrane research for the last 20 years and have continuously shown promise in this field of research. Polysulfone (PSf) membranes were obtained through the phase inversion method, with different TiO2 nanoparticle concentrations (0, 0.1, 0.5, and 1 wt.%) and two types of TiO2 crystalline structure (anatase and rutile), via the addition of commercially available nanopowders. Research showed improvement in all studied properties. In particular, the 0.5 wt.% TiO2 rutile membrane recorded an increase in permeability of 139.7% compared to the control membrane. In terms of overall performance, the best nanocomposite membrane demonstrated a performance index increase of 71.1% compared with the control membrane.
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Affiliation(s)
- Iulian-Gabriel Birsan
- Department of Applied Sciences, Cross-Border Faculty, Dunarea de Jos University of Galati, 111th Domneasca Street, 800201 Galati, Romania; (I.-G.B.); (A.C.)
| | - Stefan Catalin Pintilie
- Department of Applied Sciences, Cross-Border Faculty, Dunarea de Jos University of Galati, 111th Domneasca Street, 800201 Galati, Romania; (I.-G.B.); (A.C.)
- Correspondence: or (S.C.P.); (S.B.)
| | - Laurentia Geanina Pintilie
- Department of Materials and Environmental Engineering, Faculty of Engineering, Dunarea de Jos University of Galati, 111th Domneasca Street, 800201 Galati, Romania or (L.G.P.); (A.L.L.)
| | - Andreea Liliana Lazar
- Department of Materials and Environmental Engineering, Faculty of Engineering, Dunarea de Jos University of Galati, 111th Domneasca Street, 800201 Galati, Romania or (L.G.P.); (A.L.L.)
| | - Adrian Circiumaru
- Department of Applied Sciences, Cross-Border Faculty, Dunarea de Jos University of Galati, 111th Domneasca Street, 800201 Galati, Romania; (I.-G.B.); (A.C.)
| | - Stefan Balta
- Department of Materials and Environmental Engineering, Faculty of Engineering, Dunarea de Jos University of Galati, 111th Domneasca Street, 800201 Galati, Romania or (L.G.P.); (A.L.L.)
- Correspondence: or (S.C.P.); (S.B.)
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Guo T, Oztug NAK, Han P, Ivanovski S, Gulati K. Influence of sterilization on the performance of anodized nanoporous titanium implants. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2021; 130:112429. [PMID: 34702514 DOI: 10.1016/j.msec.2021.112429] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2021] [Revised: 08/22/2021] [Accepted: 09/06/2021] [Indexed: 12/27/2022]
Abstract
Towards clinical translation of bioactive nano-engineered titanium implants, achieving appropriate sterilization and understanding its influence on the modified implant characteristics is essential. With limited studies exploring the influence of sterilization techniques on electrochemically anodized titanium with TiO2 nanostructures, we aimed to advance this domain by performing an in-depth evaluation of the influence of common sterilization techniques (ethanol immersion, various UV irradiation times, gamma irradiation, and dry/wet autoclaving) on TiO2 nanopores fabricated on micro-rough Ti surfaces (dual micro-nano) via single step anodization. Various sterilized surfaces were systematically compared in terms of topographical, chemical, crystalline, wettability and mechanical characteristics. Next, we investigated the protein adhesion capacity and functions of primary gingival fibroblasts (proliferation, adhesion/alignment and spreading morphology) to compare the bioactivity of the sterilized nanopores. Ethanol immersion, gamma irradiation and UV irradiation conserved the topography of the fabricated nanopores, while autoclave sterilization (both dry and wet) compromised the nanoporous structures. Various duration of UV-sterilization resulted in no significant changes in the surface topography and chemistry of the fabricated TNPs. Our findings revealed that UV irradiation is the most appropriate technique to sterilize nano-engineered titanium implants for appropriate wettability, protein adhesion capacity and enhanced metabolism and proliferation of human gingival fibroblasts (hGFs). This study systematically investigated the influence of sterilization on anodized nano-engineered titanium implants towards achieving reproducible outcomes (in terms of topography, chemistry and bioactivity), and found that UV irradiation holds great promise for application across different nano-engineered metal surfaces.
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Affiliation(s)
- Tianqi Guo
- The University of Queensland, School of Dentistry, Herston, QLD 4006, Australia
| | - Necla Asli Kocak Oztug
- The University of Queensland, School of Dentistry, Herston, QLD 4006, Australia; Istanbul University, Faculty of Dentistry, Department of Periodontology, Istanbul 34116, Turkey
| | - Pingping Han
- The University of Queensland, School of Dentistry, Herston, QLD 4006, Australia
| | - Sašo Ivanovski
- The University of Queensland, School of Dentistry, Herston, QLD 4006, Australia.
| | - Karan Gulati
- The University of Queensland, School of Dentistry, Herston, QLD 4006, Australia.
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11
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Chuang CY, Zhang MH, Tseng WJ. Emulsion preparation of ultralight TiO2 foams for selective oil absorption. Ann Ital Chir 2021. [DOI: 10.1016/j.jeurceramsoc.2021.02.037] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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12
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Preparation of High-Transparency, Superhydrophilic Visible Photo-Induced Photocatalytic Film via a Rapid Plasma-Modification Process. COATINGS 2021. [DOI: 10.3390/coatings11070784] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
In this study, different amounts of SiO2 nanoparticles (7 nm) were added to simultaneously reach high transmittance, high hardness, and high adhesion for TiO2 film prepared by the sol–gel method and coated on glass through a dip-coating technique. For the film to achieve self-cleaning, anti-fogging, superhydrophilicity, and visible photo-induced photocatalysis, TiO2-SiO2 film was modified via a rapid microwave plasma-nitridation process for efficient N-doping by various N2-containing gases (N2, N2/Ar/O2, N2/Ar). Through nitrogen plasma, the content of N atom reached 1.3% with the ratio of O/Ti atom being 2.04. The surface of the thin films was smooth, homogeneous, and did not crack, demonstrated by the root mean square (RMS) roughness of film surface being 3.29–3.94 nm. In addition, the films were composed of nanoparticles smaller than 10 nm, with a thickness of about 100 nm, as well as the crystal phase of the thin film being anatase. After the plasma-nitridation process, the visible-light transmittance of N-doped TiO2-SiO2 films was 89.7% (clean glass = 90.1%). Moreover, the anti-fogging ability was excellent (contact angle < 5°) even without light irradiation. The degradation of methylene blue showed that the photocatalytic performance of N-doped TiO2-SiO2 films was apparently superior to that of unmodified films under visible-light irradiation. Moreover, the pencil hardness and adhesion rating test of the thin films were 7H and 5B, respectively, indicating that the obtained coatings had great mechanical stability.
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13
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Oh H, Kikuchi H, Lee JH, Kim SJ, Lee JB, Cho MS, Lee MY, Okumura Y, Hong JH, Hong SK. Ultraviolet light screen using cholesteric liquid crystal capsules on the basis of selective reflection. RSC Adv 2021; 11:25471-25476. [PMID: 35478880 PMCID: PMC9037046 DOI: 10.1039/d1ra03499e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Accepted: 07/06/2021] [Indexed: 11/21/2022] Open
Abstract
When the prepared cholesteric liquid crystal microcapsule is applied to the skin, it can protect the skin by selectively reflecting only ultraviolet rays in sunlight like sunscreen cosmetics.
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Affiliation(s)
- Heemuk Oh
- Department of Chemical & Biochemical Engineering
- Dongguk University-Seoul
- Seoul
- Republic of Korea
- Cosmax Inc
| | - Hirotugu Kikuchi
- Institute for Materials Chemistry and Engineering
- Kyushu University
- Fukuoka
- Japan
| | | | | | | | - Moon Sun Cho
- Department of Chemical & Biochemical Engineering
- Dongguk University-Seoul
- Seoul
- Republic of Korea
| | - Min Young Lee
- Department of Chemical & Biochemical Engineering
- Dongguk University-Seoul
- Seoul
- Republic of Korea
| | - Yasushi Okumura
- Institute for Materials Chemistry and Engineering
- Kyushu University
- Fukuoka
- Japan
| | - Joo-Hee Hong
- Department of Industrial Chemical Engineering
- Suncheon Jeil College
- Suncheon
- Republic of Korea
| | - Sung-Kyu Hong
- Department of Chemical & Biochemical Engineering
- Dongguk University-Seoul
- Seoul
- Republic of Korea
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14
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Madan S, Shaw R, Tiwari S, Tiwari SK. Enhancing corrosion stability and shelf life of nanoscale zero-valent iron via encapsulation in porous Ze-TiO2 matrix: An interface for simultaneous oxidation and adsorption of As(III). Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2020.125381] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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15
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Xue M, Sampath J, Gebhart RN, Haugen HJ, Lyngstadaas SP, Pfaendtner J, Drobny G. Studies of Dynamic Binding of Amino Acids to TiO 2 Nanoparticle Surfaces by Solution NMR and Molecular Dynamics Simulations. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:10341-10350. [PMID: 32693593 PMCID: PMC8098425 DOI: 10.1021/acs.langmuir.0c01256] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Adsorption of biomolecules onto material surfaces involves a potentially complex mechanism where molecular species interact to varying degrees with a heterogeneous material surface. Surface adsorption studies by atomic force microscopy, sum frequency generation spectroscopy, and solid-state NMR detect the structures and interactions of biomolecular species that are bound to material surfaces, which, in the absence of a solid-liquid interface, do not exchange rapidly between surface-bound forms and free molecular species in bulk solution. Solution NMR has the potential to complement these techniques by detecting and studying transiently bound biomolecules at the liquid-solid interface. Herein, we show that dark-state exchange saturation transfer (DEST) NMR experiments on gel-stabilized TiO2 nanoparticle (NP) samples detect several forms of biomolecular adsorption onto titanium(IV) oxide surfaces. Specifically, we use the DEST approach to study the interaction of amino acids arginine (Arg), lysine (Lys), leucine (Leu), alanine (Ala), and aspartic acid (Asp) with TiO2 rutile NP surfaces. Whereas Leu, Ala, and Asp display only a single weakly interacting form in the presence of TiO2 NPs, Arg and Lys displayed at least two distinct bound forms: a species that is surface bound and retains a degree of reorientational motion and a second more tightly bound form characterized by broadened DEST profiles upon the addition of TiO2 NPs. Molecular dynamics simulations indicate different surface bound states for both Lys and Arg depending on the degree of TiO2 surface hydroxylation but only a single bound state for Asp regardless of the degree of surface hydroxylation, in agreement with results obtained from the analysis of DEST profiles.
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Affiliation(s)
- Mengjun Xue
- Department of Chemistry, University of Washington, Box 351700, Seattle, Washington 98195, United States
| | - Janani Sampath
- Department of Chemical Engineering, University of Washington, Box 351700, Seattle, Washington 98195, United States
| | - Rachel N Gebhart
- Department of Chemistry, University of Washington, Box 351700, Seattle, Washington 98195, United States
| | - Havard J Haugen
- Department for Biomaterials, Faculty for Odontology, University of Oslo, P.O. Box 1109, Blindern, Oslo NO-0317, Norway
| | - S Petter Lyngstadaas
- Department for Biomaterials, Faculty for Odontology, University of Oslo, P.O. Box 1109, Blindern, Oslo NO-0317, Norway
| | - Jim Pfaendtner
- Department of Chemical Engineering, University of Washington, Box 351700, Seattle, Washington 98195, United States
| | - Gary Drobny
- Department of Chemistry, University of Washington, Box 351700, Seattle, Washington 98195, United States
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16
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Adsorption Capacities of Hygroscopic Materials Based on NaCl-TiO 2 and NaCl-SiO 2 Core/Shell Particles. JOURNAL OF NANOTECHNOLOGY 2020. [DOI: 10.1155/2020/3683629] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Hygroscopic materials which possess high moisture adsorption capacity were successfully upgraded by the functionalization of sodium chloride (NaCl) using two nuances of oxides. A procedure was developed to first prepare submicron-sized NaCl crystals; thereafter, these crystals were coated by choice of either titanium dioxide (TiO2) or silica (SiO2) to enhance the hygroscopic properties of NaCl and prevent its premature deliquescence. After coating, several analytical techniques were employed to evaluate the obtained composite materials. Our findings revealed that both composites NaCl-TiO2 and NaCl-SiO2 gave excellent performances by exhibiting interesting hydrophilic properties, compared to the sole NaCl. This was demonstrated by both environmental scanning electron microscope (ESEM) and water vapor adsorption experiments. In particular, NaCl-TiO2 composite showed the highest water adsorption capacity at low relative humidity and at a faster adsorption rate, induced by the high surface energy owing to the presence of TiO2. This result was also confirmed by the kinetics of adsorption, which revealed that not only does NaCl-TiO2 adsorb more water vapor than NaCl-SiO2 or sole NaCl but also the adsorption occurred at a much higher rate. While at room temperature and high relative humidity, the NaCl-SiO2 composite showed the best adsorption properties making it ideal to be used as a hygroscopic material, showing maximum adsorption performance compared to NaCl-TiO2 or sole NaCl. Therefore, NaCl-TiO2 and NaCl-SiO2 composites could be considered as promising hygroscopic materials and potential candidates to replace the existing salt seeding agents.
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17
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Fouling-resistant PVDF nanofibre membranes for the desalination of brackish water in membrane distillation. Sep Purif Technol 2019. [DOI: 10.1016/j.seppur.2019.115793] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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18
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Mieiro CL, Martins M, da Silva M, Coelho JP, Lopes CB, da Silva AA, Alves J, Pereira E, Pardal M, Costa MH, Pacheco M. Advances on assessing nanotoxicity in marine fish - the pros and cons of combining an ex vivo approach and histopathological analysis in gills. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2019; 217:105322. [PMID: 31639587 DOI: 10.1016/j.aquatox.2019.105322] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Revised: 09/30/2019] [Accepted: 09/30/2019] [Indexed: 06/10/2023]
Abstract
The need to overcome logistic and ethical limitations of in vivo nanotoxicity evaluation in marine organisms is essential, mostly when dealing with fish. It is well established that medium/solvent conditions affect dispersion and agglomeration of nanoparticles (NPs), which represents a constraint towards a solid and realistic toxicity appraisal. In this way the pros and cons of an ex vivo approach, using a simplified exposure medium (seawater) and addressing gills histopathology, were explored. The nanotoxic potential of environmentally realistic concentrations of titanium dioxide NPs (TiO2 NPs) was also assessed, disclosing the morpho-functional effects on the gills and the possible uptake/elimination processes. Excised gills of the Senegalese sole (Solea senegalensis) were directly exposed in artificial seawater to 20 and 200 μg L-1 TiO2 NPs, for 2 h and 4 h. Semi-quantitative and quantitative histological analyses were applied. The normal morphology of the gill's epithelia was only slightly altered in the control, reflecting protective mechanisms against the artificiality of the experimental conditions, which, together with the absence of differences in the global histopathological index (Ih), corroborated that the gill's morpho-functional features were not compromised, thereby validating the proposed ex vivo approach. TiO2 NPs induced moderate severity and dissemination of histopathological lesions. After 2 h, a series of compensatory mechanisms occurred in NP treatments, implying an efficient response of the innate defense system (increasing number of goblet cells) and effective osmoregulatory ability (chloride cells proliferation). After 4 h, gills revealed signs of recovery (normalization of the number of chloride and goblet cells; similar Ih), highlighting the tissue viability and effective elimination and/or neutralization of NPs. The uptake of the TiO2 NPs seemed to be favored by the higher particle sizes. Overall, the proposed approach emerged as a high-throughput, reliable, accurate and ethically commendable methodology for nanotoxicity assessment in marine fish.
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Affiliation(s)
- C L Mieiro
- Department of Biology & CESAM, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal; Centre for Functional Ecology - CFE, Department of Life Sciences, University of Coimbra, Calçada Martim de Freitas, 3000-456 Coimbra, Portugal.
| | - M Martins
- MARE & Department of Environmental Sciences, Faculty of Sciences and Technology, University Nova of Lisbon, 2829-516 Caparica, Portugal; UCIBIO, REQUIMTE, Department of Chemistry, Faculty of Sciences and Technology, University Nova of Lisbon, 2829-516 Caparica, Portugal
| | - M da Silva
- MARE & Department of Environmental Sciences, Faculty of Sciences and Technology, University Nova of Lisbon, 2829-516 Caparica, Portugal
| | - J P Coelho
- Department of Biology & CESAM, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - C B Lopes
- Department of Chemistry & CICECO, University of Aveiro, 3810-193 Aveiro, Portugal
| | - A Alves da Silva
- Centre for Functional Ecology - CFE, Department of Life Sciences, University of Coimbra, Calçada Martim de Freitas, 3000-456 Coimbra, Portugal
| | - J Alves
- Centre for Functional Ecology - CFE, Department of Life Sciences, University of Coimbra, Calçada Martim de Freitas, 3000-456 Coimbra, Portugal
| | - E Pereira
- Department of Chemistry & CESAM, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - M Pardal
- Centre for Functional Ecology - CFE, Department of Life Sciences, University of Coimbra, Calçada Martim de Freitas, 3000-456 Coimbra, Portugal
| | - M H Costa
- MARE & Department of Environmental Sciences, Faculty of Sciences and Technology, University Nova of Lisbon, 2829-516 Caparica, Portugal
| | - M Pacheco
- Department of Biology & CESAM, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
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19
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Smýkalová A, Sokolová B, Foniok K, Matějka V, Praus P. Photocatalytic Degradation of Selected Pharmaceuticals Using g-C 3N 4 and TiO 2 Nanomaterials. NANOMATERIALS 2019; 9:nano9091194. [PMID: 31450849 PMCID: PMC6780102 DOI: 10.3390/nano9091194] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Revised: 08/16/2019] [Accepted: 08/22/2019] [Indexed: 11/16/2022]
Abstract
Exfoliated graphitic carbon nitride (g-C3N4) and two commercially available nanomaterials from titanium dioxide (P25 and CG300) were tested for the photocatalytic degradation of paracetamol (PAR), ibuprofen (IBU), and diclofenac (DIC). Prior to photocatalytic experiments, the nanomaterials were characterized by common methods, such as X-ray diffraction (XRD), UV–VIS diffuse reflectance spectroscopy (DRS), Fourier transformed infrared spectroscopy in attenuated total reflection mode (FTIR–ATR), transmission electron microscopy (TEM), physisorption of nitrogen, and dynamic vapor adsorption (DVS) of water. The sizes and specific surface area (SSA) of the TiO2 nanoparticles were 6 nm and 300 m2·g−1 for CG300 and 21 nm and 50 m2·g−1 for P25. The SSA of g-C3N4 was 140 m2·g−1. All photocatalytic experiments were performed under UV (368 nm), as well as VIS (446 nm) irradiation. TiO2 P25 was the most active photocatalyst under UV irradiation and g-C3N4 was the most active one under VIS irradiation. Photodegradation yields were evaluated by means of high performance liquid chromatography (HPLC) and reaction intermediates were identified using gas chromatography with mass detection (GC–MS). Paracetamol and ibuprofen were totally removed but the intermediates of diclofenac were observed even after 6 h of irradiation. Some intermediates, such as carbazole-1-acetic acid, 2,6-dichloraniline, and hydroxylated derivates of diclofenac were identified. This study showed that g-C3N4 is a promising photocatalyst for the degradation of pharmaceuticals in an aqueous environment, under visible light.
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Affiliation(s)
- Aneta Smýkalová
- Department of Chemistry, VŠB Technical University of Ostrava, 17. listopadu 2172/15, 700 33 Ostrava, Czech Republic
- Institute of Environmental technologies, VŠB Technical University of Ostrava, 17. listopadu 2172/15, 700 33 Ostrava, Czech Republic
| | - Barbora Sokolová
- Institute of Environmental technologies, VŠB Technical University of Ostrava, 17. listopadu 2172/15, 700 33 Ostrava, Czech Republic
| | - Kryštof Foniok
- Department of Chemistry, VŠB Technical University of Ostrava, 17. listopadu 2172/15, 700 33 Ostrava, Czech Republic
| | - Vlastimil Matějka
- Department of Chemistry, VŠB Technical University of Ostrava, 17. listopadu 2172/15, 700 33 Ostrava, Czech Republic
- Institute of Environmental technologies, VŠB Technical University of Ostrava, 17. listopadu 2172/15, 700 33 Ostrava, Czech Republic
| | - Petr Praus
- Department of Chemistry, VŠB Technical University of Ostrava, 17. listopadu 2172/15, 700 33 Ostrava, Czech Republic.
- Institute of Environmental technologies, VŠB Technical University of Ostrava, 17. listopadu 2172/15, 700 33 Ostrava, Czech Republic.
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20
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Zhang X, Liu S, Salim A, Seeger S. Hierarchical Structured Multifunctional Self-Cleaning Material with Durable Superhydrophobicity and Photocatalytic Functionalities. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2019; 15:e1901822. [PMID: 31184439 DOI: 10.1002/smll.201901822] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Revised: 05/13/2019] [Indexed: 06/09/2023]
Abstract
Self-cleaning materials, which are inspired and derived from natural phenomena, have gained significant scientific and commercial interest in the past decades as they are energy- and labor-saving and environmentally friendly. Several technologies are developed to obtain self-cleaning materials. The combination of superhydrophobic and photocatalytic properties enables the efficient removal of solid particles and organic contaminations, which could reduce or damage the superhydrophobicity. However, the fragility of the nanoscale roughness of the superhydrophobic surface limits its practical application. Here, a hierarchical structure approach combining micro- and nanoscale architectures is created to protect the nanoscale surface roughness from mechanical damage. Glass beads of 75 µm are partially embedded into a low-density polyethylene film. This composite surface is coated with silicone nanofilaments (SNFs) via the droplet-assisted growth and shaping approach, providing the nanoscale surface roughness as well as the support for the photocatalyst with enlarged surface area. TiO2 nanoparticles, which serve as the photocatalyst, are synthesized in situ on SNFs through a hydrothermal reaction. The self-cleaning effect is proved using wettability measurements for various liquids, degradation of organic contamination under UV light, and antibacterial tests. The enhanced mechanical durability of the hierarchical structure of the composite material is verified with an abrasion test.
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Affiliation(s)
- Xiaotian Zhang
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, 8057, Zurich, Switzerland
| | - Shanqiu Liu
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, 8057, Zurich, Switzerland
| | - Alma Salim
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, 8057, Zurich, Switzerland
| | - Stefan Seeger
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, 8057, Zurich, Switzerland
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Hosseini Ravandi SA, Mehrara S, Sadrjahani M, Khodaparast Haghi A. Tunable wicking behavior via titanium oxide embedded in polyacrylonitrile nanofiber strings of yarn. Polym Bull (Berl) 2019. [DOI: 10.1007/s00289-019-02737-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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22
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In Vitro Properties for Bioceramics Composed of Silica and Titanium Oxide Composites. APPLIED SCIENCES-BASEL 2018. [DOI: 10.3390/app9010066] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
It is important for oral and maxillofacial surgeons to repair craniofacial defects on oral cancer patients or patients with congenital problems. Thus, it is a challenge to develop biomaterials that promote bone regeneration as potential materials for bone repair. This work is devoted to the fabrication of bioceramics composed of silica and titanium oxide with various concentrations of titanium oxide for developing bone repair materials for dentistry and tissue engineering. The silica-based bioceramics were synthesized using the sol–gel method, and titanium oxide was added from the hydrolysis of tetrabutyl titanate. The surface morphology was observed using scanning electron microscopy. The chemical composition was measured using an energy dispersive X-ray spectrometer, and the crystal structure was identified by using an X-ray diffraction diffractometer. The pH value and ion concentrations released in simulated body fluids after immersion with bioceramic samples were measured using a pH meter and inductively coupled plasma mass spectrometry, respectively. In the cell toxicity test, the human osteosarcoma cells (MG63) were used and quantitatively assessed using an MTT assay. The results showed that the proposed bioceramics can be controlled by tuning the Si/Ti ratio to modify the dissolution rate of samples and enhance the formation of apatite. Compared to Dulbecco’s modified Eagle’s medium (DMEM) groups, the cell number of the BG_Ti75 group can be increased to 120%. Furthermore, BG_Ti75 can promote MG63 cell growth with statistical significance and keep the pH value and the released calcium ion concentrations of the soaking environment stable. The proposed bioceramics show potential for bone-regenerating capability.
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23
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Zhang D, Lee C, Javed H, Yu P, Kim JH, Alvarez PJJ. Easily Recoverable, Micrometer-Sized TiO 2 Hierarchical Spheres Decorated with Cyclodextrin for Enhanced Photocatalytic Degradation of Organic Micropollutants. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:12402-12411. [PMID: 30272446 DOI: 10.1021/acs.est.8b04301] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Micrometer-sized titanium dioxide hierarchical spheres (TiO2-HS) were assembled from nanosheets to address two common limitations of photocatalytic water treatment: (1) inefficiency associated with scavenging of oxidation capacity by nontarget water constituents and (2) energy-intensive separation and recovery of the photocatalyst slurry. These micrometer-sized spheres are amenable to low-energy separation, and over 99% were recaptured from both batch and continuous flow reactors using microfiltration. Using nanosheets as building blocks resulted in a large specific surface area-3 times larger than that of commercially available TiO2 powder (Evonik P25). Anchoring food-grade cyclodextrin onto TiO2-HS (i.e., CD-TiO2-HS) provided hydrophobic cavities to entrap organic contaminants for more effective utilization of photocatalytically generated reactive oxygen species. CD-TiO2-HS removed over 99% of various contaminants with dissimilar hydrophobicity (i.e., bisphenol A, bisphenol S, 2-naphthol, and 2,4-dichlorophenol) within 2 h under a low-intensity UVA input (3.64 × 10-6 einstein/L/s). As with other catalyst (including TiO2 slurry), periodic replacement or replenishment would be needed to maintain high treatment efficiency (e.g., we demonstrate full reactivation through simple reanchoring of CD). Nevertheless, this task would be offset by significant savings in photocatalyst separation. Thus, CD-TiO2-HS is an attractive candidate for photocatalytic water and wastewater treatment of recalcitrant organic pollutants.
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Affiliation(s)
| | - Changgu Lee
- Department of Environmental and Safety Engineering , Ajou University , Suwon , South Korea
| | | | | | - Jae-Hong Kim
- Department of Chemical & Environmental Engineering , Yale University , New Haven , Connecticut 06520 , United States
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TiO2/Bi2S3 ball-and-stick structure heterojunction prepared on FTO glass as a photoanode for solar cells. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2018. [DOI: 10.1007/s13738-018-1501-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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25
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Mehrabani MG, Karimian R, Rakhshaei R, Pakdel F, Eslami H, Fakhrzadeh V, Rahimi M, Salehi R, Kafil HS. Chitin/silk fibroin/TiO 2 bio-nanocomposite as a biocompatible wound dressing bandage with strong antimicrobial activity. Int J Biol Macromol 2018; 116:966-976. [PMID: 29782987 DOI: 10.1016/j.ijbiomac.2018.05.102] [Citation(s) in RCA: 73] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2018] [Revised: 05/04/2018] [Accepted: 05/15/2018] [Indexed: 12/16/2022]
Abstract
Interconnected microporous biodegradable and biocompatible chitin/silk fibroin/TiO2 nanocomposite wound dressing with high antibacterial, blood clotting and mechanical strength properties were synthesized using freeze-drying method. The prepared nanocomposite dressings were characterized using SEM, FTIR, and XRD analysis. The prepared nanocomposite dressings showed high porosity above 90% with well-defined interconnected porous construction. Swelling and water uptake of the dressing were 93%, which is great for wound dressing applications. Haemostatic potential of the prepared dressings was studied and the results proved the higher blood clotting ability of the nanocomposites compared to pure components and commercially available products. Besides, cell viability, attachment and proliferation by MTT assay and DAPI staining on HFFF2 cell as a Human Caucasian Foetal Foreskin Fibroblast proved the cytocompatibility nature of the nanocomposite scaffolds with well improved proliferation and cell attachment. To determine the antimicrobial efficiencies, both disc diffusion method and colony counts were performed and results imply that nanocomposite scaffolds have high antimicrobial activity and could successfully inhibit the growth of E. coli, S. aureus, and C. albicans. Moreover, based on these results, the prepared chitin/silk fibroin/TiO2 nanocomposite dressing could serve as a kind of promising wound dressing with great antibacterial and antifungal properties.
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Affiliation(s)
- Mojtaba Ghanbari Mehrabani
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran; Chemical Injuries Research Center, Systems Biology and Poisonings Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Ramin Karimian
- Chemical Injuries Research Center, Systems Biology and Poisonings Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran.
| | - Rasul Rakhshaei
- Faculty of Chemistry, Department of Organic and Biochemistry, Tabriz University, Tabriz, Iran
| | - Farzaneh Pakdel
- Connective tissues Research Center, Tabriz University of Medical Sciences, Tabriz, Iran; Dental and Periodontal Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Hosein Eslami
- Dental and Periodontal Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Vahid Fakhrzadeh
- Dental and Periodontal Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mahdi Rahimi
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran; Faculty of Chemistry, Department of Organic and Biochemistry, Tabriz University, Tabriz, Iran
| | - Roya Salehi
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Hossein Samadi Kafil
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.
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Gunnarsson SB, Bernfur K, Mikkelsen A, Cedervall T. Analysis of nanoparticle biomolecule complexes. NANOSCALE 2018; 10:4246-4257. [PMID: 29436548 DOI: 10.1039/c7nr08696b] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Nanoparticles exposed to biological fluids adsorb biomolecules on their surface forming a biomolecular corona. This corona determines, on a molecular level, the interactions and impact the newly formed complex has on cells and organisms. The corona formation as well as the physiological and toxicological relevance are commonly investigated. However, an acknowledged but rarely addressed problem in many fields of nanobiotechnology is aggregation and broadened size distribution of nanoparticles following their interactions with the molecules of biological fluids. In blood serum, TiO2 nanoparticles form complexes with a size distribution from 30 nm to more than 500 nm. In this study we have separated these complexes, with good resolution, using preparative centrifugation in a sucrose gradient. Two main apparent size populations were obtained, a fast sedimenting population of complexes that formed a pellet in the preparative centrifugation tube, and a slow sedimenting complex population still suspended in the gradient after centrifugation. Concentration and surface area dependent differences are found in the biomolecular corona between the slow and fast sedimenting fractions. There are more immunoglobulins, lipid binding proteins, and lipid-rich complexes at higher serum concentrations. Sedimentation rate and the biomolecular corona are important factors for evaluating any experiment including nanoparticle exposure. Our results show that traditional description of nanoparticles in biological fluids is an oversimplification and that more thorough characterisations are needed.
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Affiliation(s)
- Stefán B Gunnarsson
- Department of Biochemistry and Structural Biology, Lund University, Box 124, 22100 Lund, Sweden
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Toxicity screening of a novel poly(methylmethacrylate)-Eudragit nanocarrier on L929 fibroblasts. Toxicol Lett 2017; 276:129-137. [DOI: 10.1016/j.toxlet.2017.05.017] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2016] [Revised: 05/02/2017] [Accepted: 05/15/2017] [Indexed: 01/25/2023]
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28
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Multiple endpoints to evaluate pristine and remediated titanium dioxide nanoparticles genotoxicity in lung epithelial A549 cells. Toxicol Lett 2017; 276:48-61. [DOI: 10.1016/j.toxlet.2017.05.016] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2016] [Revised: 05/05/2017] [Accepted: 05/15/2017] [Indexed: 12/14/2022]
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Magnetic recyclable microcomposite silica-steel core with TiO 2 nanocomposite shell photocatalysts for sustainable water purification. Colloids Surf A Physicochem Eng Asp 2017. [DOI: 10.1016/j.colsurfa.2017.03.034] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Abstract
Nanotoxicity of nanomaterials is an important issue in view of their potential applications in systemic circulation and wound healing dressing. This account specifically deals with several characteristic features of different nanomaterials which induce hemolysis and how to make them hemocompatible. The shape, size, and surface functionalities of naked metallic as well as nonmetallic nanoparticles surfaces are responsible for the hemolysis. An appropriate coating of biocompatible molecules dramatically reduces hemolysis and promotes their ability as safe drug delivery vehicles. The use of coated nanomaterials in wound healing dressing opens several new strategies for rapid wound healing processes. Properly designed nanomaterials should be selected to minimize the nanotoxicity in the wound healing process. Future directions need new synthetic methods for engineered nanomaterials for their best use in nanomedicine and nanobiotechnology.
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Affiliation(s)
- Mandeep Singh Bakshi
- Department of Natural and Applied Sciences, University of Wisconsin-Green Bay , 2420 Nicolet Drive, Green Bay, Wisconsin 54311-7001, United States
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31
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Schön P, Ctistis G, Bakker W, Luthe G. Nanoparticular surface-bound PCBs, PCDDs, and PCDFs-a novel class of potentially higher toxic POPs. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:12758-12766. [PMID: 26939687 DOI: 10.1007/s11356-016-6211-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2015] [Accepted: 01/31/2016] [Indexed: 06/05/2023]
Abstract
In a previous study, Env Sci Poll Res:1-7, 2015 showed that polychlorinated biphenyls (PCBs), polychlorinated dibenzo dioxins (PCDDs), and polychlorinated dibenzo furanes (PCDFs) are found in commercially available (nano) particular titanium dioxide as a result of the fabrication. Here, we give a brief perspective and reason the toxicity of these new classes of persistent organic pollutants (POPs) by reviewing also their nanoparticular properties, such as surface-to-volume ratio, photocatalytic activity, polarity shifts, and stealth effect. These insights point towards a new class of POPs and toxicologic effects, which are related to the size but not a result of nanotechnology itself. We pave the way to the understanding of until now unresolved very complex phenomena, such as the indoor exposure, formation, and transformation of POP and sick-building syndrome. This is a fundamental message for nanotoxicology and kinetics and should be taken into account when determining the toxicity of nanomaterials and POPs separately and as a combination.
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Affiliation(s)
- Peter Schön
- NanoBioInterface Research Group, School of Life Science, Engineering, and Design, Saxion University of Applied Sciences, M.H. Tromplaan 28, P.O. Box 70.000, 7500 KB, Enschede, The Netherlands
- Materials Science and Technology of Polymers, MESA+ Institute for Nanotechnology, University of Twente, PO Box 217, 7500 AE, Enschede, The Netherlands
| | - Georgios Ctistis
- NanoBioInterface Research Group, School of Life Science, Engineering, and Design, Saxion University of Applied Sciences, M.H. Tromplaan 28, P.O. Box 70.000, 7500 KB, Enschede, The Netherlands
- Complex Photonic Systems (COPS), MESA+ Institute for Nanotechnology, University of Twente, PO Box 217, 7500 AE, Enschede, The Netherlands
| | - Wouter Bakker
- NanoBioInterface Research Group, School of Life Science, Engineering, and Design, Saxion University of Applied Sciences, M.H. Tromplaan 28, P.O. Box 70.000, 7500 KB, Enschede, The Netherlands
| | - Gregor Luthe
- Department of Occupational and Environmental Health, The University of Iowa, 100 Oakdale Campus, Iowa City, IA, 52242, USA.
- Interdisciplinary Graduate Program in Human Toxicology, The University of Iowa, 100 Oakdale Campus, Iowa City, IA, 52242, USA.
- Luthe Pharma, Fabrikstrasse 2, 48599, Gronau, Germany.
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Chen C, Wu W, Xu WZ, Charpentier PA. The effect of silica thickness on nano TiO 2 particles for functional polyurethane nanocomposites. NANOTECHNOLOGY 2017; 28:115709. [PMID: 28211360 DOI: 10.1088/1361-6528/aa5cf0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
In order to help reduce the agglomeration of TiO2 nanoparticles in polyurethane coatings while enhancing their photoactivity and mechanical/physical properties, this work examined encapsulating TiO2 nanoparticles in a thin layer of SiO2, prior to their nanocomposite polymerization. By applying a Stöber process, varying thicknesses of SiO2 were successfully coated onto the surface of anatase and rutile TiO2 nanoparticles. The methylene blue results showed that different loadings of SiO2 onto the TiO2 surface significantly influenced their photocatalytic activity. When the loading weight of SiO2 was lower than 3.25 wt%, the photocatalytic activity was enhanced, while with higher loadings, it gave lower photocatalytic activity. When the rutile phase TiO2 surface was fully covered with SiO2, an enhanced photocatalytic activity was observed. When these silica coated nanoparticles were applied in polyurethane coatings, increasing the amount of SiO2 on the titania surface increased the coatings contact angle from 75° to 87° for anatase phase and 70°-78° for rutile phase. The Young's modulus was also increased from 1.06 GPa to 2.77 GMPa for anatase phase and 1.06-2.17 GPa for rutile phase, attributed to the silica layer giving better integration. The thermal conductivity of the polyurethane coatings was also successfully decreased by encapsulating SiO2 on the titania surface for next generation high performance coatings.
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Affiliation(s)
- Chao Chen
- Department of Chemical and Biochemical Engineering, Western University, London, Ontario, N6A 5B9, Canada
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Mathur A, Parashar A, Chandrasekaran N, Mukherjee A. Nano-TiO 2 enhances biofilm formation in a bacterial isolate from activated sludge of a waste water treatment plant. INTERNATIONAL BIODETERIORATION & BIODEGRADATION 2017; 116:17-25. [DOI: 10.1016/j.ibiod.2016.09.024] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2023]
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Kosmulski M. Isoelectric points and points of zero charge of metal (hydr)oxides: 50years after Parks' review. Adv Colloid Interface Sci 2016; 238:1-61. [PMID: 27890403 DOI: 10.1016/j.cis.2016.10.005] [Citation(s) in RCA: 184] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2016] [Revised: 10/27/2016] [Accepted: 10/28/2016] [Indexed: 02/06/2023]
Abstract
The pH-dependent surface charging of metal (hydr)oxides is reviewed on the occasion of the 50th anniversary of the publication by G.A. Parks: "Isoelectric points of solid oxides, solid hydroxides, and aqueous hydroxo complex systems" in Chemical Reviews. The point of zero charge (PZC) and isoelectric point (IEP) became standard parameters to characterize metal oxides in aqueous dispersions, and they define adsorption (surface excess) of ions, stability against coagulation, rheological properties of dispersions, etc. They are commonly used in many branches of science including mineral processing, soil science, materials science, geochemistry, environmental engineering, and corrosion science. Parks established standard procedures and experimental conditions which are required to obtain reliable and reproducible values of PZC and IEP. The field is very active, and the number of related papers exceeds 300 a year, and the standards established by Parks remain still valid. Relevant experimental techniques improved over the years, especially the measurements of electrophoretic mobility became easier and more reliable, are the numerical values of PZC and IEP compiled by Parks were confirmed by contemporary publications with a few exceptions. The present paper is an up-to-date compilation of the values of PZC and IEP of metal oxides. Unlike in former reviews by the same author, which were more comprehensive, only limited number of selected results are presented and discussed here. On top of the results obtained by means of classical methods (titration and electrokinetic methods), new methods and correlations found over the recent 50years are presented.
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Kim YK, Kang EB, Kim SH, Sharker SM, Kong BY, In I, Lee KD, Park SY. Visible-Light-Driven Photocatalysts of Perfluorinated Silica-Based Fluorescent Carbon Dot/TiO 2 for Tunable Hydrophilic-Hydrophobic Surfaces. ACS APPLIED MATERIALS & INTERFACES 2016; 8:29827-29834. [PMID: 27750014 DOI: 10.1021/acsami.6b12618] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
In this study, a new hydrophilic-hydrophobic transition surface was designed via visible-light-induced photocatalytic perfluorinated silica-based fluorescent carbon nanoparticles (FNPs)/TiO2. Perfluorinated silica-polydopamine hybrid FNPs (f-FNPs) were easily fabricated by carbonization in an emulsion system consisting of tetraethyl orthosilicate and dopamine, followed by the deposition of TiO2 on f-FNPs, which demonstrated the reversal from hydrophobic to hydrophilic nature during successful photocatalysis. The synergistic effect of silica-carbon and the deposited TiO2 NPs led to the decomposition of methylene blue under UV and visible light irradiation, demonstrating that FNPs/TiO2 sustains photocatalytic activity. The profound contact angle with the catalytic kinetics curve and precise morphology and extension of cells detach antifouling exceptionally unrestricted the synergistic effect of silica-carbon on TiO2 NPs on a coated paper substrate. Given the interest in the manipulation of hydrophobicity and hydrophilicity, this study can serve as a guideline for the fabrication of photocatalytic surfaces where water spreads completely.
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Affiliation(s)
| | | | | | - Shazid Md Sharker
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST) , Daejeon 305-701, Republic of Korea
| | | | | | - Kang-Dae Lee
- Department of Otolaryngology-Head and Neck Surgery, Kosin University College of Medicine , 262 Gamcheon-ro, Suh-gu, Busan, 49267, Republic of Korea
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Yokel RA. Physicochemical properties of engineered nanomaterials that influence their nervous system distribution and effects. NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE 2016; 12:2081-2093. [DOI: 10.1016/j.nano.2016.05.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2015] [Revised: 05/06/2016] [Accepted: 05/10/2016] [Indexed: 10/21/2022]
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37
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Gun’ko V, Turov V, Zarko V, Goncharuk O, Pakhlov E, Skubiszewska-Zięba J, Blitz J. Interfacial phenomena at a surface of individual and complex fumed nanooxides. Adv Colloid Interface Sci 2016; 235:108-189. [PMID: 27344189 DOI: 10.1016/j.cis.2016.06.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2016] [Revised: 06/01/2016] [Accepted: 06/01/2016] [Indexed: 10/21/2022]
Abstract
Investigations of interfacial and temperature behaviors of nonpolar and polar adsorbates interacting with individual and complex fumed metal or metalloid oxides (FMO), initial and subjected to various treatments or chemical functionalization and compared to such porous adsorbents as silica gels, precipitated silica, mesoporous ordered silicas, filled polymeric composites, were analyzed. Complex nanooxides include core-shell nanoparticles, CSNP (50-200nm in size) with titania or alumina cores and silica or alumina shells in contrast to simple and smaller nanoparticles of individual FMO. CSNP could be destroyed under high-pressure cryogelation (HPCG) or mechanochemical activation (MCA). These treatments affect the structure of aggregates of nanoparticles and agglomerates of aggregates, resulting in their becoming more compacted. The analysis shows that complex FMO could be more sensitive to external actions than simple nanooxides such as fumed silica. Any treatment of 'soft' FMO affects the interfacial and temperature behaviors of polar and nonpolar adsorbates. Rearrangement of secondary particles and surface functionalization affects the freezing-melting point depression of adsorbates. For some adsorbates, open hysteresis loops became readily apparent in adsorption-desorption isotherms. Clustering of adsorbates bound in textural pores in aggregates of nanoparticles (i.e., voids between nanoparticles in secondary structures) causes reduced changes in enthalpy during phase transitions (freezing, fusion, evaporation). Freezing point depression and melting point elevation cause significant hysteresis freezing-melting effects for adsorbates bound to FMO in the textural pores. Relaxation phenomena for both low- and high-molecular weight adsorbates or filled polymeric composites are affected by the morphology of primary particles, structural organization of secondary particles of differently treated or functionalized FMO, content of adsorbates, co-adsorption order, and temperature.
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38
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Brandt EG, Agosta L, Lyubartsev AP. Reactive wetting properties of TiO2 nanoparticles predicted by ab initio molecular dynamics simulations. NANOSCALE 2016; 8:13385-13398. [PMID: 27341183 DOI: 10.1039/c6nr02791a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Small-sized wet TiO2 nanoparticles have been investigated by ab initio molecular dynamics simulations. Chemical and physical adsorption of water on the TiO2-water interface was studied as a function of water content, ranging from dry nanoparticles to wet nanoparticles with monolayer coverage of water. The surface reactivity was shown to be a concave function of water content and driven by surface defects. The local coordination number at the defect was identified as the key factor to decide whether water adsorption proceeds through dissociation or physisorption on the surface. A consistent picture of TiO2 nanoparticle wetting at the microscopic level emerges, which corroborates existing experimental data and gives further insight into the molecular mechanisms behind nanoparticle wetting. These calculations will facilitate the engineering of metal oxide nanoparticles with a controlled catalytic water activity.
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Affiliation(s)
- Erik G Brandt
- Department of Materials and Environmental Chemistry, Stockholm University, Stockholm, Sweden.
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39
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Bouguerra S, Gavina A, Ksibi M, Rasteiro MDG, Rocha-Santos T, Pereira R. Ecotoxicity of titanium silicon oxide (TiSiO4) nanomaterial for terrestrial plants and soil invertebrate species. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2016; 129:291-301. [PMID: 27060256 DOI: 10.1016/j.ecoenv.2016.03.038] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2015] [Revised: 03/25/2016] [Accepted: 03/28/2016] [Indexed: 05/23/2023]
Abstract
The huge evolution of nanotechnology and the commercialization of nanomaterials (NMs) positively contributed for innovation in several industrial sectors. Facing this rapid development and the emergence of NMs in the market, the release of this nanometric sized materials in the environment and the possible impact on different ecosystem components attracted the attention of researchers in the last few years. In our study we aimed to assess the impact of titanium silicon oxide nanomaterial (nano-TiSiO4) on soil biota to estimate a risk limit for this material. In the present research a battery of standardized ecotoxicological assays aimed at evaluating a wide range of endpoints (avoidance and reproduction of earthworms and collembolans, emergence/growth of four selected terrestrial plants) were carried out, using OECD artificial soil as test substrate spiked with aqueous suspension of different concentrations of nano-TiSiO4. The results showed a maximum avoidance percentage of 40% for earthworms (Esenia andrei) at the highest concentration tested (1000mgkg(-1) soildw of nano-TiSiO4). No significant effect on the reproductive function of both invertebrate species was recorded. Nevertheless, significant phytotoxic data was registered at least for the growth of dicotyledonous plant species (Lactuca sativa and Lycopersicon lycopersicum) with EC20 values ranging between 236 and 414 mg kg(-1) soildw of nano-TiSiO4 for L. sativa dry mass and fresh mass, respectively. Further, the characterization of nano-TiSiO4 in suspensions used to spike the soil, performed by Dynamic Light Scattering, showed the formation of aggregates with important average size diameter, thus demonstrating that the toxic effects observed were likely not size dependent. A deterministic PNEC (predicted no effect concentration) for this NM of 10.02mg kg(-1) soildw of nano-TiSiO4, is suggested, while no more ecotoxicological information exists.
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Affiliation(s)
- Sirine Bouguerra
- Department of Biology, Faculty of Sciences of the University of Porto, Rua do Campo Alegre, s/n, 4169-007 Porto, Portugal; Laboratory of Water, Energy and Environment (3E), National School of Engineering of Sfax, University of Sfax, Route de Soukra Km 3.5, PO Box 1173, 3038 Sfax, Tunisia.
| | - Ana Gavina
- Department of Biology, Faculty of Sciences of the University of Porto, Rua do Campo Alegre, s/n, 4169-007 Porto, Portugal; CIIMAR - Interdisciplinary Centre of Marine & Environmental Research, Rua dos Bragas, n. 289, 4050-123 Porto, Portugal
| | - Mohamed Ksibi
- Laboratory of Water, Energy and Environment (3E), National School of Engineering of Sfax, University of Sfax, Route de Soukra Km 3.5, PO Box 1173, 3038 Sfax, Tunisia
| | - Maria da Graça Rasteiro
- Department of Chemical Engineering & CIEPQPF & University of Coimbra, 3030-290 Coimbra, Portugal
| | - Teresa Rocha-Santos
- Department of Chemistry & CESAM, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal
| | - Ruth Pereira
- Department of Biology, Faculty of Sciences of the University of Porto, Rua do Campo Alegre, s/n, 4169-007 Porto, Portugal; CIIMAR - Interdisciplinary Centre of Marine & Environmental Research, Rua dos Bragas, n. 289, 4050-123 Porto, Portugal
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Panarelli EG, Livraghi S, Maurelli S, Polliotto V, Chiesa M, Giamello E. Role of surface water molecules in stabilizing trapped hole centres in titanium dioxide (anatase) as monitored by electron paramagnetic resonance. J Photochem Photobiol A Chem 2016. [DOI: 10.1016/j.jphotochem.2016.02.015] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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41
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Stoccoro A, Di Bucchianico S, Uboldi C, Coppedè F, Ponti J, Placidi C, Blosi M, Ortelli S, Costa AL, Migliore L. A panel of in vitro tests to evaluate genotoxic and morphological neoplastic transformation potential on Balb/3T3 cells by pristine and remediated titania and zirconia nanoparticles. Mutagenesis 2016; 31:511-29. [PMID: 27056944 DOI: 10.1093/mutage/gew015] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The FP7 Sanowork project was aimed to minimise occupational hazard and exposure to engineered nanomaterials (ENM) through the surface modification in order to prevent possible health effects. In this frame, a number of nanoparticles (NP) have been selected, among which zirconium (ZrO2) and titanium (TiO2) dioxide. In this study, we tested ZrO2 NP and TiO2 NP either in their pristine (uncoated) form, or modified with citrate and/or silica on their surface. As benchmark material, Aeroxide® P25 was used. We assessed cytotoxicity, genotoxicity and induction of morphological neoplastic transformation of NP by using a panel of in vitro assays in an established mammalian cell line of murine origin (Balb/3T3). Cell viability was evaluated by means of colony-forming efficiency assay (CFE). Genotoxicity was investigated by cytokinesis-block micronucleus cytome assay (CBMN cyt) and comet assay, and by the use of the restriction enzymes EndoIII and Fpg, oxidatively damaged DNA was detected; finally, the morphological neoplastic transformation of NP was assayed in vitro by cell transformation assay (CTA). Our results show that the surface remediation has not been effective in modifying cyto- and genotoxic properties of the nanomaterials tested; indeed, in the case of remediation of zirconia and titania with citrate, there is a tendency to emphasise the toxic effects. The use of a panel of assays, such as those we have employed, allowing the evaluation of multiple endpoints, including cell transformation, seems particularly advisable especially in the case of long-term exposure effects in the same cell type.
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Affiliation(s)
- Andrea Stoccoro
- Laboratory of Medical Genetics, Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, Via Roma 55, Pisa 56126, Italy, Doctoral School in GeneticsOncology and Clinical MedicineDepartment of Medical BiotechnologiesUniversity of Siena, 53100 Siena, Italy
| | - Sebastiano Di Bucchianico
- Laboratory of Medical Genetics, Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, Via Roma 55, Pisa 56126, Italy
| | - Chiara Uboldi
- Laboratory of Medical Genetics, Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, Via Roma 55, Pisa 56126, Italy
| | - Fabio Coppedè
- Laboratory of Medical Genetics, Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, Via Roma 55, Pisa 56126, Italy
| | - Jessica Ponti
- European Commission, Joint Research Centre (JRC), Institute for Health and Consumer Protection (IHCP), Nanobiosciences (NBS) Unit, via E. Fermi 2749, 21027 Ispra (VA), Italy
| | - Claudia Placidi
- Department of Pathology, Ospedale di Circolo and Department of Human Morphology, University of Insubria,via Ottorino Rossi 9, 21100 Varese, VA, Italy and
| | - Magda Blosi
- Institute of Science and Technology for Ceramics (CNR-ISTEC), National Research Council of Italy, Via Granarolo 64, 48018 Faenza, RA, Italy
| | - Simona Ortelli
- Institute of Science and Technology for Ceramics (CNR-ISTEC), National Research Council of Italy, Via Granarolo 64, 48018 Faenza, RA, Italy
| | - Anna Luisa Costa
- Institute of Science and Technology for Ceramics (CNR-ISTEC), National Research Council of Italy, Via Granarolo 64, 48018 Faenza, RA, Italy
| | - Lucia Migliore
- Laboratory of Medical Genetics, Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, Via Roma 55, Pisa 56126, Italy,
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Fang T, Yu LP, Zhang WC, Bao SP. Effects of humic acid and ionic strength on TiO₂ nanoparticles sublethal toxicity to zebrafish. ECOTOXICOLOGY (LONDON, ENGLAND) 2015; 24:2054-2066. [PMID: 26410372 DOI: 10.1007/s10646-015-1541-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 09/16/2015] [Indexed: 06/05/2023]
Abstract
The stability and bioavailability of titanium dioxide nanoparticles (TiO2 NPs) suspension could be modified by the physicochemical properties of solution. In the present study, the effect of humic acid (HA) and ionic strength (by adding NaCl) on aggregation and sedimentation of TiO2 NPs suspension were investigated. Accordingly, the sublethal toxicity of TiO2 NPs suspensions with different HA and NaCl concentrations toward zebrafish (Danio rerio) was evaluated by monitoring the changes of superoxide dismutase, catalase, malonaldehyde and glutathione in gill, liver and intestine. The results showed that the aggregations formation and hydrodynamic diameter of TiO2 NPs in suspensions are not essential characteristics to decide toxicity. The varied oxidative stress responses detected in gill, liver and intestine derived from different toxicity mechanisms of TiO2 NPs. Nevertheless, the oxidative stress could be suppressed by the adding of HA and/or the increase of ionic strength, which can decrease the bioavailability of TiO2 NPs in water. The study suggests that the environmental factors, such as HA and ionic strength, are important for the fate (aggregation and sedimentation) and toxicity of nanomaterials in aquatic environment.
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Affiliation(s)
- T Fang
- Institute of Hydrobiology, Chinese Academy of Sciences, No. 7 Donghu South Road, Wuchang District, Wuhan, Hubei, China.
| | - L P Yu
- Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, China
- Graduate University of Chinese Academy of Sciences, Beijing, China
| | - W C Zhang
- Institute of Hydrobiology, Chinese Academy of Sciences, No. 7 Donghu South Road, Wuchang District, Wuhan, Hubei, China
| | - S P Bao
- Institute of Hydrobiology, Chinese Academy of Sciences, No. 7 Donghu South Road, Wuchang District, Wuhan, Hubei, China
- Graduate University of Chinese Academy of Sciences, Beijing, China
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43
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In-situ characterization of nanoparticle beams focused with an aerodynamic lens by Laser-Induced Breakdown Detection. Sci Rep 2015; 5:15696. [PMID: 26498694 PMCID: PMC4620506 DOI: 10.1038/srep15696] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2014] [Accepted: 09/15/2015] [Indexed: 01/28/2023] Open
Abstract
The Laser-Induced Breakdown Detection technique (LIBD) was adapted to achieve fast in-situ characterization of nanoparticle beams focused under vacuum by an aerodynamic lens. The method employs a tightly focused, 21 μm, scanning laser microprobe which generates a local plasma induced by the laser interaction with a single particle. A counting mode optical detection allows the achievement of 2D mappings of the nanoparticle beams with a reduced analysis time thanks to the use of a high repetition rate infrared pulsed laser. As an example, the results obtained with Tryptophan nanoparticles are presented and the advantages of this method over existing ones are discussed.
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44
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Water adsorption on TiO2 surfaces probed by soft X-ray spectroscopies: bulk materials vs. isolated nanoparticles. Sci Rep 2015; 5:15088. [PMID: 26462615 PMCID: PMC4604456 DOI: 10.1038/srep15088] [Citation(s) in RCA: 91] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2015] [Accepted: 09/14/2015] [Indexed: 11/08/2022] Open
Abstract
We describe an experimental method to probe the adsorption of water at the surface of isolated, substrate-free TiO2 nanoparticles (NPs) based on soft X-ray spectroscopy in the gas phase using synchrotron radiation. To understand the interfacial properties between water and TiO2 surface, a water shell was adsorbed at the surface of TiO2 NPs. We used two different ways to control the hydration level of the NPs: in the first scheme, initially solvated NPs were dried and in the second one, dry NPs generated thanks to a commercial aerosol generator were exposed to water vapor. XPS was used to identify the signature of the water layer shell on the surface of the free TiO2 NPs and made it possible to follow the evolution of their hydration state. The results obtained allow the establishment of a qualitative determination of isolated NPs' surface states, as well as to unravel water adsorption mechanisms. This method appears to be a unique approach to investigate the interface between an isolated nano-object and a solvent over-layer, paving the way towards new investigation methods in heterogeneous catalysis on nanomaterials.
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Chen HYT, Livraghi S, Giamello E, Pacchioni G. Mechanism of the Cyclo-Oligomerisation of C2H2on Anatase TiO2(101) and (001) Surfaces and Their Reduction: An Electron Paramagnetic Resonance and Density Functional Theory Study. Chempluschem 2015; 81:64-72. [DOI: 10.1002/cplu.201500383] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2015] [Indexed: 11/10/2022]
Affiliation(s)
- Hsin-Yi Tiffany Chen
- Dipartimento di Scienza dei Materiali; Università di Milano-Bicocca; via Cozzi 55 20125 Milano Italy
| | - Stefano Livraghi
- Dipartimento di Chimica and NIS; Università di Torino; Via P. Giuria 7 10125 Torino Italy
| | - Elio Giamello
- Dipartimento di Chimica and NIS; Università di Torino; Via P. Giuria 7 10125 Torino Italy
| | - Gianfranco Pacchioni
- Dipartimento di Scienza dei Materiali; Università di Milano-Bicocca; via Cozzi 55 20125 Milano Italy
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Huerta-García E, Márquez-Ramírez SG, Ramos-Godinez MDP, López-Saavedra A, Herrera LA, Parra A, Alfaro-Moreno E, Gómez EO, López-Marure R. Internalization of titanium dioxide nanoparticles by glial cells is given at short times and is mainly mediated by actin reorganization-dependent endocytosis. Neurotoxicology 2015; 51:27-37. [PMID: 26340880 DOI: 10.1016/j.neuro.2015.08.013] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2015] [Revised: 08/27/2015] [Accepted: 08/27/2015] [Indexed: 01/12/2023]
Abstract
Many nanoparticles (NPs) have toxic effects on multiple cell lines. This toxicity is assumed to be related to their accumulation within cells. However, the process of internalization of NPs has not yet been fully characterized. In this study, the cellular uptake, accumulation, and localization of titanium dioxide nanoparticles (TiO2 NPs) in rat (C6) and human (U373) glial cells were analyzed using time-lapse microscopy (TLM) and transmission electron microscopy (TEM). Cytochalasin D (Cyt-D) was used to evaluate whether the internalization process depends of actin reorganization. To determine whether the NP uptake is mediated by phagocytosis or macropinocytosis, nitroblue tetrazolium (NBT) reduction was measured and the 5-(N-ethyl-N-isopropyl)-amiloride was used. Expression of proteins involved with endocytosis and exocytosis such as caveolin-1 (Cav-1) and cysteine string proteins (CSPs) was also determined using flow cytometry. TiO2 NPs were taken up by both cell types, were bound to cellular membranes and were internalized at very short times after exposure (C6, 30 min; U373, 2h). During the uptake process, the formation of pseudopodia and intracellular vesicles was observed, indicating that this process was mediated by endocytosis. No specific localization of TiO2 NPs into particular organelles was found: in contrast, they were primarily localized into large vesicles in the cytoplasm. Internalization of TiO2 NPs was strongly inhibited by Cyt-D in both cells and by amiloride in U373 cells; besides, the observed endocytosis was not associated with NBT reduction in either cell type, indicating that macropinocytosis is the main process of internalization in U373 cells. In addition, increases in the expression of Cav-1 protein and CSPs were observed. In conclusion, glial cells are able to internalize TiO2 NPs by a constitutive endocytic mechanism which may be associated with their strong cytotoxic effect in these cells; therefore, TiO2 NPs internalization and their accumulation in brain cells could be dangerous to human health.
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Affiliation(s)
- Elizabeth Huerta-García
- Departamento de Fisiología (Biología Celular), Instituto Nacional de Cardiología "Ignacio Chávez", Mexico; Departamento de Posgrado, Escuela Superior de Medicina, Instituto Politécnico Nacional, Mexico
| | - Sandra Gissela Márquez-Ramírez
- Departamento de Fisiología (Biología Celular), Instituto Nacional de Cardiología "Ignacio Chávez", Mexico; Departamento de Posgrado, Escuela Superior de Medicina, Instituto Politécnico Nacional, Mexico
| | | | | | - Luis Alonso Herrera
- Unidad de Investigación Biomédica en Cáncer, Instituto Nacional de Cancerología, Mexico; Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Mexico
| | - Alberto Parra
- Departamento de Inmunología, Escuela Superior de Medicina, Instituto Politécnico Nacional, Mexico
| | - Ernesto Alfaro-Moreno
- Laboratorio de Toxicología Ambiental, Subdirección de Investigación Básica, Instituto Nacional de Cancerología, Mexico(h); Swedish Toxicology Sciences Research Center (Swetox), Södertälje, Sweden
| | - Erika Olivia Gómez
- Academia de Biología, Colegio de Ciencias y Humanidades, Universidad Autónoma de la Ciudad de México, Mexico
| | - Rebeca López-Marure
- Departamento de Fisiología (Biología Celular), Instituto Nacional de Cardiología "Ignacio Chávez", Mexico.
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Mathur A, Raghavan A, Chaudhury P, Johnson J, Roy R, Kumari J, Chaudhuri G, Chandrasekaran N, Suraishkumar G, Mukherjee A. Cytotoxicity of titania nanoparticles towards waste water isolate Exiguobacterium acetylicum under UVA, visible light and dark conditions. JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING 2015; 3:1837-1846. [DOI: 10.1016/j.jece.2015.06.026] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/19/2023]
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48
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Nanosized TiO2 is internalized by dorsal root ganglion cells and causes damage via apoptosis. NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE 2015; 11:1309-19. [DOI: 10.1016/j.nano.2015.04.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2014] [Revised: 03/29/2015] [Accepted: 04/03/2015] [Indexed: 12/21/2022]
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49
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Marucco A, Carella E, Fenoglio I. A comparative study on the efficacy of different probes to predict the photo-activity of nano-titanium dioxide toward biomolecules. RSC Adv 2015. [DOI: 10.1039/c5ra14303a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A systematic study has been performed to select cell-free tests able to predict the photo-activity of nano-TiO2 in living organisms.
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Affiliation(s)
- A. Marucco
- Dip. Chimica
- “G. Scansetti” Interdepartmental Centre for Studies on Asbestos and Other Toxic Particulates
- NIS – Nanostructured Interfaces and Surfaces
- University of Torino
- Italy
| | - E. Carella
- Dip. Chimica
- “G. Scansetti” Interdepartmental Centre for Studies on Asbestos and Other Toxic Particulates
- NIS – Nanostructured Interfaces and Surfaces
- University of Torino
- Italy
| | - I. Fenoglio
- Dip. Chimica
- “G. Scansetti” Interdepartmental Centre for Studies on Asbestos and Other Toxic Particulates
- NIS – Nanostructured Interfaces and Surfaces
- University of Torino
- Italy
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50
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Ortelli S, Blosi M, Delpivo C, Gardini D, Dondi M, Gualandi I, Tonelli D, Aina V, Fenoglio I, Gandhi AA, Tofail SA, Costa A. Multiple approach to test nano TiO2 photo-activity. J Photochem Photobiol A Chem 2014. [DOI: 10.1016/j.jphotochem.2014.07.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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