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Rodrigues GLC, de Oliveira TG, Gusmão SBS, Ferreira OP, Vasconcelos TL, Guerra Y, Milani R, Peña-Garcia R, Viana BC. Study of Structural and Optical Properties of Titanate Nanotubes with Erbium under Heat Treatment in Different Atmospheres. MATERIALS (BASEL, SWITZERLAND) 2023; 16:1842. [PMID: 36902957 PMCID: PMC10004321 DOI: 10.3390/ma16051842] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Revised: 01/27/2023] [Accepted: 02/02/2023] [Indexed: 06/18/2023]
Abstract
Titanate nanotubes were synthesized and subjected to an ion exchange reaction with erbium salt aqueous solution to obtain titanate nanotubes exchanged with erbium (3+) ions. In order to evaluate the effects of the thermal treatment atmosphere on the structural and optical properties of erbium titanate nanotubes, we subjected them to heat treatment in air and argon atmospheres. For comparison, titanate nanotubes were also treated in the same conditions. A complete structural and optical characterizations of the samples was performed. The characterizations evidenced the preservation of the morphology with the presence of phases of erbium oxides decorating the surface of the nanotubes. Variations in the dimensions of the samples (diameter and interlamellar space) were promoted by the replacement of Na+ by Er3+ and the thermal treatment in different atmospheres. In addition, the optical properties were investigated by UV-Vis absorption spectroscopy and photoluminescence spectroscopy. The results revealed that the band gap of the samples depends on the variation of diameter and sodium content caused by ion exchange and thermal treatment. Furthermore, the luminescence strongly depended on vacancies, evidenced mainly by the calcined erbium titanate nanotubes in argon atmosphere. The presence of these vacancies was confirmed by the determination of Urbach energy. The results suggest the use of thermal treated erbium titanate nanotubes in argon atmosphere in optoelectronics and photonics applications, such as photoluminescent devices, displays, and lasers.
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Affiliation(s)
- Gelson L. C. Rodrigues
- Federal Institute of Piauí (IFPI), Parnaíba 64211-145, PI, Brazil
- Interdisciplinary Laboratory of Advanced Materials (LIMAV), Materials Science and Engineering Graduate Program, Federal University of Piauí (UFPI), Teresina 64049-550, PI, Brazil
| | - Tainara G. de Oliveira
- Interdisciplinary Laboratory of Advanced Materials (LIMAV), Materials Science and Engineering Graduate Program, Federal University of Piauí (UFPI), Teresina 64049-550, PI, Brazil
| | - Suziete B. S. Gusmão
- Interdisciplinary Laboratory of Advanced Materials (LIMAV), Materials Science and Engineering Graduate Program, Federal University of Piauí (UFPI), Teresina 64049-550, PI, Brazil
| | - Odair P. Ferreira
- Department of Chemistry, State University of Londrina, Londrina 86050-482, PR, Brazil
| | - Thiago L. Vasconcelos
- National Institute of Metrology, Quality and Technology (Inmetro), Duque de Caxias 25250-02, RJ, Brazil
| | - Yuset Guerra
- Department of Physics, Federal University of Piauí (UFPI), Teresina 64049-550, PI, Brazil
| | - Raquel Milani
- Department of Physics, Federal University of Pernambuco (UFPE), Recife 50670-901, PE, Brazil
| | - Ramón Peña-Garcia
- Interdisciplinary Laboratory of Advanced Materials (LIMAV), Materials Science and Engineering Graduate Program, Federal University of Piauí (UFPI), Teresina 64049-550, PI, Brazil
- Academic Unit of Cabo de Santo Agostinho, Federal Rural University of Pernambuco (UFRPE), Cabo de Santo Agostinho 50670-901, PE, Brazil
| | - Bartolomeu C. Viana
- Interdisciplinary Laboratory of Advanced Materials (LIMAV), Materials Science and Engineering Graduate Program, Federal University of Piauí (UFPI), Teresina 64049-550, PI, Brazil
- Department of Physics, Federal University of Piauí (UFPI), Teresina 64049-550, PI, Brazil
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Ali IO, Salama TM, A. Gawad A, El‐Henawy AA, Ghazy M, Bakr MF. Silver nanoparticles @ titanate nanotubes composite: Synthesis, characterization, applications and docking. INORG CHEM COMMUN 2022. [DOI: 10.1016/j.inoche.2021.109187] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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Na-TiNT Nanocrystals: Synthesis, Characterization, and Antibacterial Properties. Bioinorg Chem Appl 2022; 2022:2302943. [PMID: 35186052 PMCID: PMC8856833 DOI: 10.1155/2022/2302943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2021] [Revised: 12/26/2021] [Accepted: 01/04/2022] [Indexed: 11/18/2022] Open
Abstract
Titanium nanotubes have attractive morphological and physicochemical properties for several applications, such as high surface area, mesoporous structure, good stability, ion exchange capacity, and antibacterial property. Therefore, the field of nanotube applications is increasingly expanding, such as in solar cells sensitized by dye, photocatalysis, and antibacterial activity, among others. Therefore, a study of the antibacterial properties of sodium titanate nanotubes (Na-TiNTs) was carried out together with physicochemical characterizations, such as Raman spectroscopy which shows a peak characteristic of Na-O-Ti from nanotube-agglomerated regions. The XRD diffractogram confirmed the Raman spectra and evidenced the crystalline structure associated to Na-TiNT, which showed the characteristic peaks of the sodium trititanate crystal. SEM and TEM images showed the morphology of hollow nanotubes and forming semispherical particles. EDS shows the percentage values of each of the compounds in the Na-TiNT. The bacterial activity of the Na-TiNT was analyzed in Escherichia coli, Staphylococcus aureus, and Pseudomonas aeruginosa. Na-TiNT modified the activity of the gentamicin and norfloxacin antibiotics against multiresistant strains. Synergistic effects against Gram-positive S. aureus 10 and Gram-negative P. aeruginosa 15 bacteria were observed when the Na-TiNT was associated with gentamicin, reducing the concentration of this antibiotic that is required to inhibit bacterial growth. Another synergic effect was observed for S. aureus 10 with norfloxacin.
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Sales DA, Marques TMF, Ghosh A, Gusmão SBS, Vasconcelos TL, Luz-Lima C, Ferreira OP, Hollanda LM, Lima IS, Silva-Filho EC, Dittz D, Lobo AO, Viana BC. Synthesis of silver-cerium titanate nanotubes and their surface properties and antibacterial applications. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 115:111051. [PMID: 32600685 DOI: 10.1016/j.msec.2020.111051] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Revised: 04/23/2020] [Accepted: 05/02/2020] [Indexed: 11/18/2022]
Abstract
Nano-heterostructures of titanate nanotubes were synthesized and they revealed a complex structure with the formation of TiO2 (anatase), CeO2, Ag2O and metallic silver nanoparticles on the outer walls and intercalation of Ce4+ and Ag+ into the interlayer spaces of the nanotubes by microwave-assisted hydrothermal process and subjected to ion exchange reactions. To the best of our knowledge, this is the first reported silver and cerium co-exchanged titanate nanotubes for bio-applications. The co-ion exchange processes preserved the original tubular structure of titanate nanotubes with significant changes of the superficial as well as interlamellar environment. This study opens up possibility of synthesizing complex, functional nano-heterostructure with the scope of modification of the final structure, especially the amount and oxidation state of the intercalated cation (Ce4+, Ce3+ and Ag+) as well as the quantity and variety of the decorating nanoparticles (CeO2, Ag2O or metallic Ag). The interplay of which, in turn, can lead to important biological properties and applications, owing to their ion-liberation capacity. The samples were tested in antibacterial activity with two different kind of bacteria (gram positive and negative), cell cytotoxicity and adhesion, and it was found that the nano-heterostructure formed shows high antibacterial activity with low cytotoxicity and high cell adhesion, which makes it a promising material for further health applications.
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Affiliation(s)
- Débora A Sales
- Laboratório interdisciplinar de materiais avançados (LIMAV), Programa de Pós-Graduação em Ciência e Engenharia dos Materiais, Universidade Federal do Piauí - UFPI, Teresina, PI, Brazil
| | - Thalles M F Marques
- Instituto Federal de Educação, Ciência e Tecnologia do Piauí - IFPI, 64760-000, Campus São João do Piauí, PI, Brazil
| | - Anupama Ghosh
- LaMFA - Laboratório de Materiais Funcionais Avançados, Departamento de Física, Universidade Federal do Ceará - UFC, 60440-554 Fortaleza, Ceará, Brazil; Central Analítica, Universidade Federal do Ceará - UFC, 60440-554 Fortaleza, Ceará, Brazil
| | - Suziete B S Gusmão
- Laboratório interdisciplinar de materiais avançados (LIMAV), Programa de Pós-Graduação em Ciência e Engenharia dos Materiais, Universidade Federal do Piauí - UFPI, Teresina, PI, Brazil
| | - Thiago L Vasconcelos
- Divisão de Metrologia de Materiais, Instituto Nacional de Metrologia, Qualidade e Tecnologia (INMETRO), Duque de Caxias, Rio de Janeiro 25250-020, Brazil
| | - Cleanio Luz-Lima
- Departamento de Física, Universidade Federal do Piauí - UFPI, 64049-550, Teresina, Piauí, Brazil
| | - Odair P Ferreira
- LaMFA - Laboratório de Materiais Funcionais Avançados, Departamento de Física, Universidade Federal do Ceará - UFC, 60440-554 Fortaleza, Ceará, Brazil
| | - Luciana M Hollanda
- Programa de Pós-Graduação em Biotecnologia Industrial, Universidade Tiradentes - UNIT, 49032-490 Aracaju, Sergipe, Brazil
| | - Idglan S Lima
- Laboratório interdisciplinar de materiais avançados (LIMAV), Programa de Pós-Graduação em Ciência e Engenharia dos Materiais, Universidade Federal do Piauí - UFPI, Teresina, PI, Brazil
| | - Edson C Silva-Filho
- Laboratório interdisciplinar de materiais avançados (LIMAV), Programa de Pós-Graduação em Ciência e Engenharia dos Materiais, Universidade Federal do Piauí - UFPI, Teresina, PI, Brazil
| | - Dalton Dittz
- Departamento de Bioquímica e Farmacologia, Universidade Federal do Piauí - UFPI, 64049-550 Teresina, Piauí, Brazil
| | - Anderson O Lobo
- Laboratório interdisciplinar de materiais avançados (LIMAV), Programa de Pós-Graduação em Ciência e Engenharia dos Materiais, Universidade Federal do Piauí - UFPI, Teresina, PI, Brazil
| | - Bartolomeu C Viana
- Laboratório interdisciplinar de materiais avançados (LIMAV), Programa de Pós-Graduação em Ciência e Engenharia dos Materiais, Universidade Federal do Piauí - UFPI, Teresina, PI, Brazil; Departamento de Física, Universidade Federal do Piauí - UFPI, 64049-550, Teresina, Piauí, Brazil.
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Influence of Preparation Procedure on Physicochemical and Antibacterial Properties of Titanate Nanotubes Modified with Silver. NANOMATERIALS 2019; 9:nano9050795. [PMID: 31126162 PMCID: PMC6566197 DOI: 10.3390/nano9050795] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/07/2019] [Revised: 05/18/2019] [Accepted: 05/20/2019] [Indexed: 12/26/2022]
Abstract
Silver nanoparticles (NPs) are effective antibacterial agents; however, aggregation of NPs and uncontrolled release of Ag+ affect their efficiency and may pose a risk to the environment. To overcome these disadvantages, immobilization of Ag onto titanate nanotubes (TNTs) was investigated. This paper describes the physicochemical and antibacterial properties of silver incorporated titanate nanotubes (Ag/TNTs) prepared using five procedures and containing different Ag amounts (0.11-30.85 wt.%). The methods were (i) sol-gel followed by a hydrothermal process; (ii) photodeposition under ambient conditions; (iii) photodeposition under an inert atmosphere; (iv) NaBH4 reduction; and (v) electroless deposition after activation of TNTs with Sn2+. Depending on the synthesis procedure, the presence of metallic Ag NPs, AgO or AgCl was observed. The electroless method led to an additional deposition of SnO2 NPs. The antibacterial properties of Ag/TNTs were analyzed as a function of Ag content and released against Escherichia coli and Staphylococcus epidermidis. The best bactericidal properties exhibited Ag/TNTs prepared through the photodeposition process due to the higher interaction of exposed Ag NPs with bacteria. An increase of Ag loading resulted in improvement of antibacterial activity of Ag/TNTs although no direct correlation between silver content or release and inhibition of bacterial growth was found.
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Rónavári A, Igaz N, Gopisetty MK, Szerencsés B, Kovács D, Papp C, Vágvölgyi C, Boros IM, Kónya Z, Kiricsi M, Pfeiffer I. Biosynthesized silver and gold nanoparticles are potent antimycotics against opportunistic pathogenic yeasts and dermatophytes. Int J Nanomedicine 2018; 13:695-703. [PMID: 29440895 PMCID: PMC5798539 DOI: 10.2147/ijn.s152010] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Background Epidemiologic observations indicate that the number of systemic fungal infections has increased significantly during the past decades, however in human mycosis, mainly cutaneous infections predominate, generating major public health concerns and providing much of the impetus for current attempts to develop novel and efficient agents against cutaneous mycosis causing species. Innovative, environmentally benign and economic nanotechnology-based approaches have recently emerged utilizing principally biological sources to produce nano-sized structures with unique antimicrobial properties. In line with this, our aim was to generate silver nanoparticles (AgNPs) and gold nanoparticles (AuNPs) by biological synthesis and to study the effect of the obtained nanoparticles on cutaneous mycosis causing fungi and on human keratinocytes. Methods Cell-free extract of the red yeast Phaffia rhodozyma proved to be suitable for nanoparticle preparation and the generated AgNPs and AuNPs were characterized by transmission electron microscopy, dynamic light scattering and X-ray powder diffraction. Results Antifungal studies demonstrated that the biosynthesized silver particles were able to inhibit the growth of several opportunistic Candida or Cryptococcus species and were highly potent against filamentous Microsporum and Trichophyton dermatophytes. Among the tested species only Cryptococcus neoformans was susceptible to both AgNPs and AuNPs. Neither AgNPs nor AuNPs exerted toxicity on human keratinocytes. Conclusion Our results emphasize the therapeutic potential of such biosynthesized nanoparticles, since their biocompatibility to skin cells and their outstanding antifungal performance can be exploited for topical treatment and prophylaxis of superficial cutaneous mycosis.
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Affiliation(s)
- Andrea Rónavári
- Department of Applied and Environmental Chemistry.,Department of Biochemistry and Molecular Biology
| | - Nóra Igaz
- Department of Biochemistry and Molecular Biology
| | | | - Bettina Szerencsés
- Department of Microbiology, Faculty of Science and Informatics, University of Szeged, Szeged
| | - Dávid Kovács
- Department of Biochemistry and Molecular Biology
| | - Csaba Papp
- Department of Microbiology, Faculty of Science and Informatics, University of Szeged, Szeged
| | - Csaba Vágvölgyi
- Department of Microbiology, Faculty of Science and Informatics, University of Szeged, Szeged
| | - Imre Miklós Boros
- Department of Biochemistry and Molecular Biology.,Institute of Biochemistry, Biological Research Centre of the Hungarian Academy of Sciences
| | - Zoltán Kónya
- Department of Applied and Environmental Chemistry.,MTA-SZTE Reaction Kinetics and Surface Chemistry Research Group, Szeged, Hungary
| | | | - Ilona Pfeiffer
- Department of Microbiology, Faculty of Science and Informatics, University of Szeged, Szeged
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Rónavári A, Kovács D, Igaz N, Vágvölgyi C, Boros IM, Kónya Z, Pfeiffer I, Kiricsi M. Biological activity of green-synthesized silver nanoparticles depends on the applied natural extracts: a comprehensive study. Int J Nanomedicine 2017; 12:871-883. [PMID: 28184158 PMCID: PMC5291331 DOI: 10.2147/ijn.s122842] [Citation(s) in RCA: 96] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Due to obvious disadvantages of the classical chemical methods, green synthesis of metallic nanoparticles has attracted tremendous attention in recent years. Numerous environmentally benign synthesis methods have been developed yielding nanoparticles via low-cost, eco-friendly, and simple approaches. In this study, our aim was to determine the suitability of coffee and green tea extracts in green synthesis of silver nanoparticles as well as to compare the performance of the obtained materials in different biological systems. We successfully produced silver nanoparticles (C-AgNP and GT-AgNP) using coffee and green tea extracts; moreover, based on our comprehensive screening, we delineated major differences in the biological activity of C-AgNPs and GT-AgNPs. Our results indicate that although GT-AgNPs exhibited excellent antimicrobial activity against all the examined microbial pathogens, these particles were also highly toxic to mammalian cells, which limits their potential applications. On the contrary, C-AgNPs manifested substantial inhibitory action on the tested microbes but were nontoxic to human and mouse cells, indicating an outstanding capacity to discriminate between potential pathogens and mammalian cells. These results clearly show that the various green materials used for stabilization and for reduction of metal ions have a defining role in determining and fine-tuning the biological activity of the obtained nanoparticles.
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Affiliation(s)
| | - Dávid Kovács
- Department of Biochemistry and Molecular Biology
| | - Nóra Igaz
- Department of Biochemistry and Molecular Biology
| | | | - Imre Miklós Boros
- Department of Biochemistry and Molecular Biology; Institute of Biochemistry, Biological Research Center of the Hungarian Academy of Sciences
| | - Zoltán Kónya
- Department of Applied and Environmental Chemistry; MTA-SZTE Reaction Kinetics and Surface Chemistry Research Group, Szeged, Hungary
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