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Chelu M, Musuc AM, Popa M, Calderon Moreno JM. Chitosan Hydrogels for Water Purification Applications. Gels 2023; 9:664. [PMID: 37623119 PMCID: PMC10453846 DOI: 10.3390/gels9080664] [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: 07/24/2023] [Revised: 08/14/2023] [Accepted: 08/15/2023] [Indexed: 08/26/2023] Open
Abstract
Chitosan-based hydrogels have gained significant attention for their potential applications in water treatment and purification due to their remarkable properties such as bioavailability, biocompatibility, biodegradability, environmental friendliness, high pollutants adsorption capacity, and water adsorption capacity. This article comprehensively reviews recent advances in chitosan-based hydrogel materials for water purification applications. The synthesis methods, structural properties, and water purification performance of chitosan-based hydrogels are critically analyzed. The incorporation of various nanomaterials into chitosan-based hydrogels, such as nanoparticles, graphene, and metal-organic frameworks, has been explored to enhance their performance. The mechanisms of water purification, including adsorption, filtration, and antimicrobial activity, are also discussed in detail. The potential of chitosan-based hydrogels for the removal of pollutants, such as heavy metals, organic contaminants, and microorganisms, from water sources is highlighted. Moreover, the challenges and future perspectives of chitosan-based hydrogels in water treatment and water purification applications are also illustrated. Overall, this article provides valuable insights into the current state of the art regarding chitosan-based hydrogels for water purification applications and highlights their potential for addressing global water pollution challenges.
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Affiliation(s)
| | - Adina Magdalena Musuc
- “Ilie Murgulescu” Institute of Physical Chemistry, 202 Spl. Independentei, 060021 Bucharest, Romania; (M.C.); (M.P.)
| | | | - Jose M. Calderon Moreno
- “Ilie Murgulescu” Institute of Physical Chemistry, 202 Spl. Independentei, 060021 Bucharest, Romania; (M.C.); (M.P.)
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Kee CC, Ng K, Ang BC, Metselaar HSC. Synthesis, characterization and in-vitro biocompatibility of electrophoretic deposited europium-doped calcium silicate on titanium substrate. Ann Ital Chir 2022. [DOI: 10.1016/j.jeurceramsoc.2022.10.048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Kaur S, Kalia A, Sharma SP. Fabrication and characterization of nano-hydroxyapatite particles and assessment of the effect of their supplementation on growth of bacterial root endosymbionts of cowpea. INORG NANO-MET CHEM 2022. [DOI: 10.1080/24701556.2022.2078349] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Simranjot Kaur
- Department of Microbiology, College of Basic Sciences and Humanities, Punjab Agricultural University, Punjab, India
| | - Anu Kalia
- Department of Soil Science, Electron Microscopy and Nanoscience Laboratory, Punjab Agricultural University, Punjab, India
| | - Sat Pal Sharma
- Department of Vegetable Science, College of Horticulture and Forestry, Punjab Agricultural University, Punjab, India
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Nowak N, Wiglusz RJ. A Study of Vanadate Group Substitution into Nanosized Hydroxyapatite Doped with Eu 3+ Ions as a Potential Tissue Replacement Material. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 12:77. [PMID: 35010026 PMCID: PMC8746586 DOI: 10.3390/nano12010077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Revised: 12/20/2021] [Accepted: 12/23/2021] [Indexed: 06/14/2023]
Abstract
In this study, nanosized vanadate-substituted hydroxyapatites doped with 1 mol% and 2 mol% Eu3+ ions were obtained via the precipitation method. To evaluate the structure and morphology of the obtained compounds, the XRPD (X-ray powder diffraction) technique, Rietveld refinement, SEM-EDS (scanning electron microscopy-energy-dispersive spectrometry) and TEM (transmission electron microscopy) techniques as well as FTIR (Fourier transform infrared) spectroscopy were performed. Moreover, the chemical formula was confirmed using the ICP-OES (Inductively coupled plasma optical emission spectroscopy spectroscopy). The calculated average grain size for powders was in the range of 25 to 90 nm. The luminescence properties of vanadium-substituted hydroxyapatite were evaluated by recording emission spectra and excitation spectra as well as luminescence kinetics. The crucial step of this research was the evaluation of the biocompatibility of the synthesized nanomaterials. Therefore, the obtained compounds were tested toward sheep red blood cells and normal human dermal fibroblast to confirm the nontoxicity and biocompatibility of new nanosized Eu3+ ion-doped vanadate-hydroxyapatite. Moreover, the final step of the research allowed us to determine the time dependent ion release to the simulated body fluid environment. The study confirmed cytocompatibility of vanadium hydroxyapatite doped with Eu3+ ions.
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Affiliation(s)
- Nicole Nowak
- Institute of Low Temperature and Structure Research, Polish Academy of Sciences, Okolna 2, 50-422 Wroclaw, Poland
| | - Rafal Jakub Wiglusz
- Institute of Low Temperature and Structure Research, Polish Academy of Sciences, Okolna 2, 50-422 Wroclaw, Poland
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Influence of Terbium Ions and Their Concentration on the Photoluminescence Properties of Hydroxyapatite for Biomedical Applications. NANOMATERIALS 2021; 11:nano11092442. [PMID: 34578759 PMCID: PMC8466322 DOI: 10.3390/nano11092442] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Revised: 09/13/2021] [Accepted: 09/16/2021] [Indexed: 12/14/2022]
Abstract
A new generation of biomaterials with terbium-doped hydroxyapatite was obtained using a coprecipitation method. The synthesis of new materials with luminescent properties represents a challenging but important contribution due to their potential applications in biomedical science. The main objective of this study was to revel the influence of terbium ions on the design and structure of hydroxyapatite. Different concentrations of terbium, described by the chemical formula Ca10−xTbx(PO4)6(OH)2, where x is in the range of 0 to 1, were considered. The consequence of ion concentration on hydroxyapatite morphology was also investigated. The morphology and structure, as well as the optical properties, of the obtained nanomaterials were characterized using X-ray powder diffraction analysis (XRD), Fourier Transform Infrared spectrometry (FTIR), SEM and TEM microscopy, UV-Vis and photoluminescence spectroscopies. The measurements revealed that terbium ions were integrated into the structure of hydroxyapatite within certain compositional limits. The biocompatibility and cytotoxicity of the obtained powders evaluated using MTT assay, oxidative stress assessment and fluorescent microscopy revealed the ability of the synthesized nanomaterials to be used for biological system imaging.
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Paduraru AV, Musuc AM, Oprea OC, Trusca R, Iordache F, Vasile BS, Andronescu E. Synthesis and Characterization of Photoluminescent Ce(III) and Ce(IV) Substituted Hydroxyapatite Nanomaterials by Co-Precipitation Method: Cytotoxicity and Biocompatibility Evaluation. NANOMATERIALS 2021; 11:nano11081911. [PMID: 34443742 PMCID: PMC8399908 DOI: 10.3390/nano11081911] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/21/2021] [Revised: 07/20/2021] [Accepted: 07/22/2021] [Indexed: 01/19/2023]
Abstract
Improved compounds of Ce(III) and Ce(IV)-doped hydroxyapatite (Ca10-xCex(PO4)6(OH)2) with different concentrations such as x = 0.5, 1, 2.5, 5, and 10%, obtained by the simple co-precipitation method were synthesized. The cerium (3+) and cerium (4+)-doped hydroxyapatite were evaluated for biocompatibility and fluorescence properties. It was found that the cerium-HAp powders were non-toxic, even at higher level of concentration. The synthesized powders were further characterized by FTIR spectrometry, UV-Vis spectroscopy, XRD diffraction, SEM and TEM analysis. Therefore, the present study proves that the developed cerium (3+) and cerium (4+)-doped hydroxyapatite, respectively can be widely used as luminescent labeling materials, with improved biological properties.
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Affiliation(s)
- Andrei Viorel Paduraru
- Faculty of Applied Chemistry and Materials Science, Department of Science and Engineering of Oxide Materials and Nanomaterials, University “Politehnica” of Bucharest, 060042 Bucharest, Romania; (A.V.P.); (A.M.M.); (O.C.O.); (R.T.); (E.A.)
- National Centre for Micro and Nanomaterials, University “Politehnica” of Bucharest, 060042 Bucharest, Romania
| | - Adina Magdalena Musuc
- Faculty of Applied Chemistry and Materials Science, Department of Science and Engineering of Oxide Materials and Nanomaterials, University “Politehnica” of Bucharest, 060042 Bucharest, Romania; (A.V.P.); (A.M.M.); (O.C.O.); (R.T.); (E.A.)
- “Ilie Murgulescu” Institute of Physical Chemistry, Romanian Academy, 060021 Bucharest, Romania
| | - Ovidiu Cristian Oprea
- Faculty of Applied Chemistry and Materials Science, Department of Science and Engineering of Oxide Materials and Nanomaterials, University “Politehnica” of Bucharest, 060042 Bucharest, Romania; (A.V.P.); (A.M.M.); (O.C.O.); (R.T.); (E.A.)
| | - Roxana Trusca
- Faculty of Applied Chemistry and Materials Science, Department of Science and Engineering of Oxide Materials and Nanomaterials, University “Politehnica” of Bucharest, 060042 Bucharest, Romania; (A.V.P.); (A.M.M.); (O.C.O.); (R.T.); (E.A.)
- National Centre for Micro and Nanomaterials, University “Politehnica” of Bucharest, 060042 Bucharest, Romania
| | - Florin Iordache
- Faculty of Veterinary Medicine, Department of Biochemistry, University of Agronomic Science and Veterinary Medicine, 011464 Bucharest, Romania;
| | - Bogdan Stefan Vasile
- Faculty of Applied Chemistry and Materials Science, Department of Science and Engineering of Oxide Materials and Nanomaterials, University “Politehnica” of Bucharest, 060042 Bucharest, Romania; (A.V.P.); (A.M.M.); (O.C.O.); (R.T.); (E.A.)
- National Centre for Micro and Nanomaterials, University “Politehnica” of Bucharest, 060042 Bucharest, Romania
- National Research Centre for Food Safety, University “Politehnica” of Bucharest, 060042 Bucharest, Romania
- Correspondence:
| | - Ecaterina Andronescu
- Faculty of Applied Chemistry and Materials Science, Department of Science and Engineering of Oxide Materials and Nanomaterials, University “Politehnica” of Bucharest, 060042 Bucharest, Romania; (A.V.P.); (A.M.M.); (O.C.O.); (R.T.); (E.A.)
- National Centre for Micro and Nanomaterials, University “Politehnica” of Bucharest, 060042 Bucharest, Romania
- National Research Centre for Food Safety, University “Politehnica” of Bucharest, 060042 Bucharest, Romania
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Crystal Chemistry and Luminescence Properties of Eu-Doped Polycrystalline Hydroxyapatite Synthesized by Chemical Precipitation at Room Temperature. CRYSTALS 2020. [DOI: 10.3390/cryst10040250] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Europium-doped hydroxyapatite Ca10(PO4)6(OH)2 (3% mol) powders were synthesized by an optimized chemical precipitation method at 25 °C, followed by drying at 120 °C and calcination at 450 °C and 900 °C. The obtained nanosized crystallite samples were investigated by means of a combination of inductively coupled plasma (ICP) spectroscopy, powder X-ray diffraction (PXRD), Fourier Transform Infrared (FTIR), Raman and photoluminescence (PL) spectroscopies. The Rietveld refinement in the hexagonal P63/m space group showed europium ordered at the Ca2 site at high temperature (900 °C), and at the Ca1 site for lower temperatures (120 °C and 450 °C). FTIR and Raman spectra showed slight band shifts and minor modifications of the (PO4) bands with increasing annealing temperature. PL spectra and decay curves revealed significant luminescence emission for the phase obtained at 900 °C and highlighted the migration of Eu from the Ca1 to Ca2 site as a result of increasing calcinating temperature.
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Nicoara AI, Ene VL, Voicu BB, Bucur MA, Neacsu IA, Vasile BS, Iordache F. Biocompatible Ag/Fe-Enhanced TiO 2 Nanoparticles as an Effective Compound in Sunscreens. NANOMATERIALS (BASEL, SWITZERLAND) 2020; 10:E570. [PMID: 32245269 PMCID: PMC7153716 DOI: 10.3390/nano10030570] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Revised: 03/17/2020] [Accepted: 03/20/2020] [Indexed: 02/06/2023]
Abstract
In this work, valuable biocompatible Ag/Fe-enhanced TiO2 nanoparticles are comparatively prepared by a conventional wet chemistry method (sol-gel) and a rapid, efficient, hybrid unconventional method (microwave-assisted hydrothermal synthesis). In order to establish their application as effective compounds in sunscreens, the obtained powders were first structurally and morphologically characterized, analyses from which their nanodimensional character, crystalline structure and thermal behavior were highlighted. The evaluation of sunscreen effectiveness is based on the determination of the sun protection factor (SPF). It was observed that silver enhancing increases the SPF significantly, especially when compared to the pristine samples. The obtained Ag/Fe-enhanced TiO2 powders were also evaluated from the point of view of their biocompatibility on amniotic fluid stem cells, and the results indicated an enhance of cell proliferation when exposed to the synthesized nanostructures.
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Affiliation(s)
- Adrian Ionut Nicoara
- Faculty of Applied Chemistry and Materials Science, Department of Science and Engineering of Oxide, Materials and Nanomaterials, University Politehnica of Bucharest, 060042 Bucharest, Romania
- National Centre for Micro and Nanomaterials, University Politehnica of Bucharest, 060042 Bucharest, Romania
| | - Vladimir Lucian Ene
- Faculty of Applied Chemistry and Materials Science, Department of Science and Engineering of Oxide, Materials and Nanomaterials, University Politehnica of Bucharest, 060042 Bucharest, Romania
- National Centre for Micro and Nanomaterials, University Politehnica of Bucharest, 060042 Bucharest, Romania
| | - Bianca Beatrice Voicu
- Faculty of Applied Chemistry and Materials Science, Department of Science and Engineering of Oxide, Materials and Nanomaterials, University Politehnica of Bucharest, 060042 Bucharest, Romania
| | - Mihaela Adriana Bucur
- Faculty of Applied Chemistry and Materials Science, Department of Science and Engineering of Oxide, Materials and Nanomaterials, University Politehnica of Bucharest, 060042 Bucharest, Romania
| | - Ionela Andreea Neacsu
- Faculty of Applied Chemistry and Materials Science, Department of Science and Engineering of Oxide, Materials and Nanomaterials, University Politehnica of Bucharest, 060042 Bucharest, Romania
- National Centre for Micro and Nanomaterials, University Politehnica of Bucharest, 060042 Bucharest, Romania
| | - Bogdan Stefan Vasile
- Faculty of Applied Chemistry and Materials Science, Department of Science and Engineering of Oxide, Materials and Nanomaterials, University Politehnica of Bucharest, 060042 Bucharest, Romania
- National Centre for Micro and Nanomaterials, University Politehnica of Bucharest, 060042 Bucharest, Romania
| | - Florin Iordache
- Faculty of Veterinary Medicine, Department of Biochemistry, University of Agronomic Science and Veterinary Medicine, 011464 Bucharest, Romania
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Controlled Synthesis of Triangular Silver Nanoplates by Gelatin–Chitosan Mixture and the Influence of Their Shape on Antibacterial Activity. Processes (Basel) 2019. [DOI: 10.3390/pr7120873] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Triangular silver nanoplates were prepared by using the seeding growth approach with the presence of citrate-stabilized silver seeds and a mixture of gelatin–chitosan as the protecting agent. By understanding the critical role of reaction components, the synthesis process was improved to prepare the triangular nanoplates with high yield and efficiency. Different morphologies of silver nanostructures, such as triangular nanoplates, hexagonal nanoprisms, or nanodisks, can be obtained by changing experimental parameters, including precursor AgNO3 volume, gelatin–chitosan concentration ratios, and the pH conditions. The edge lengths of triangular silver nanoplates were successfully controlled, primarily through the addition of silver nitrate under appropriate condition. As-prepared triangular silver nanoplates were characterized by transmission electron microscopy (TEM), dynamic light scattering (DLS), UV-Vis, Fourier transform infrared spectroscopy (FT-IR), and X-Ray diffraction (XRD). Silver nanoplates had an average edge length of 65–80 nm depending on experimental conditions and exhibited a surface plasma resonance absorbance peak at 340, 450, and 700 nm. The specific interactions of gelatin and chitosan with triangular AgNPs were demonstrated by FT-IR. Based on the characterization, the growth mechanism of triangular silver nanoplates was theoretically proposed regarding the twinned crystal of the initial nanoparticle seeds and the crystal face-blocking role of the gelatin–chitosan mixture. Moreover, the antibacterial activity of triangular silver nanoplates was considerably improved in comparison with that of spherical shape when tested against Gram-positive and Gram-negative bacteria species, with 6.0 ug/mL of triangular silver nanoplates as the MBC (Minimum bactericidal concentration) for Escherichia coli and Vibrio cholera, and 8.0 ug/mL as the MBC for Staphylococcus aureus and Pseudomonas aeruginosa. The MIC (Minimum inhibitory concentration) of triangular Ag nanoplates was 4.0 ug/mL for E. coli, V. cholera, S. aureus, and P. aeruginosa.
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