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Monem AS, Fahmy HM, Mosleh AM, Salama EM, Ahmed MM, Mahmoud EAAEQ, Nour BH, Fathy MM. Assessment of the Effect of Surface Modification of Metal Oxides on Silver Nanoparticles: Optical Properties and Potential Toxicity. Cell Biochem Biophys 2024:10.1007/s12013-024-01272-2. [PMID: 38743135 DOI: 10.1007/s12013-024-01272-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/08/2024] [Indexed: 05/16/2024]
Abstract
Silver nanoparticles (AgNPs) have garnered significant interest due to their distinctive properties and potential applications. Traditional fabrication methods for nanoparticles often involve high-energy physical conditions and the use of toxic solvents. Various green synthesis approaches have been developed to circumvent these issues and produce environmentally benign nanoparticles. Our study focuses on the green synthesis of AgNPs using L-ascorbic acid and explores the modification of their properties to enhance antibacterial and anticancer effects. This is achieved by coating the nanoparticles with Zinc oxide (ZnO) and Silica oxide (SiO2), which alters their optical properties in the visible spectrum. The synthesized formulations-AgNPs, zinc oxide-silver nanoparticles (Ag@ZnO), and silica oxide-silver nanoparticles (Ag@SiO2) core/shell nanoparticles-were characterized using a suite of physicochemical techniques, including Transmission Electron Microscopy (TEM), Dynamic Light Scattering (DLS), Zeta potential measurement, UV-Vis spectroscopy, Refractive Index Measurements, and Optical Anisotropy Assessment. TEM imaging revealed particle sizes of 11 nm for AgNPs, 8 nm for Ag@ZnO, and 400 nm for Ag@SiO2. The Zeta potential values for Ag@ZnO and Ag@SiO2 were measured at -17.0 ± 5 mV and -65.0 ± 8 mV, respectively. UV-Vis absorption spectra were recorded for all formulations in the 320 nm to 600 nm wavelength range. The refractive index of AgNPs at 404.7 nm was 1.34572, with slight shifts observed for Ag@ZnO and Ag@SiO2 to 1.34326 and 1.37378, respectively. The cytotoxicity of the nanocomposites against breast cancer cell lines (MCF-7) was assessed using the MTT assay. The results indicated that AgNPs and Ag@ZnO exhibited potent therapeutic effects, with IC50 values of 494.00 µg/mL and 430.00 µg/mL, respectively, compared to 4247.20 µg/mL for Ag@SiO2. Additionally, the antibacterial efficacy of AgNPs was significantly enhanced under visible light irradiation. Ag@ZnO demonstrated substantial antibacterial activity both with and without light exposure, while the Ag@SiO2 nanocomposites significantly reduced the inherent antibacterial activity of silver. Conversely, the Ag@ZnO nanocomposites displayed pronounced antibacterial and anticancer activities. The findings suggest that silver-based nanocomposites, particularly Ag@ZnO, could be practical tools in water treatment and the pharmaceutical industry due to their enhanced therapeutic properties.
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Affiliation(s)
- Ahmed Soltan Monem
- Faculty of Science, Biophysics Department, Cairo University, 12613, Giza, Egypt
| | - Heba Mohamed Fahmy
- Faculty of Science, Biophysics Department, Cairo University, 12613, Giza, Egypt.
| | | | - Eman Mohamed Salama
- Faculty of Science, Physics Department, Cairo University, 12613, Giza, Egypt
| | - Mostafa Mohamed Ahmed
- Faculty of Science, Chemistry-Microbiology Department, Cairo University, 12613, Giza, Egypt
| | | | - Bsma Hassan Nour
- Faculty of Science, Chemistry-Zoology Department, Cairo University, 12613, Giza, Egypt
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Shilar FA, Ganachari SV, Patil VB, Khan TMY, Almakayeel NM, Alghamdi S. Review on the Relationship between Nano Modifications of Geopolymer Concrete and Their Structural Characteristics. Polymers (Basel) 2022; 14:polym14071421. [PMID: 35406294 PMCID: PMC9003342 DOI: 10.3390/polym14071421] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Revised: 03/17/2022] [Accepted: 03/23/2022] [Indexed: 12/21/2022] Open
Abstract
The main objective of this review is to study some important nanomaterials and their impact on the performance of geopolymer concrete. This paper is an investigation into trends and technology in the development of different nanomaterials to develop higher structural performance geopolymer concrete. The effect of the alkaline to binder and sodium silicate to sodium hydroxide ratio on the performances of geopolymer performances is studied. The relationship between setting time and slump is evaluated through the ternary plot, the variation in compressive strength values is evaluated using the kernel density plot, and the relationship between split tensile and flexural strength is investigated using the scattering interval plot. Regression analysis is carried out among water absorption and bulk-density result values obtained from previous literature. As the molarity and alkaline to binder (A/B) ratios increase, the strength development of geopolymer concrete increases up to a specific limit. The addition of a small quantity of nanomaterials, namely, nano silica, nano alumina, carbon nano tubes, and nano clay, led to the maximum strength development of geopolymer concrete. Incorporating these nanomaterials into the geopolymer significantly refines the structural stability, improving its durability. The various products in GP composites emerging from the incorporation of highly reactive SEM, XRD, and FTIR analysis of nanomaterials reveal that the presence of nanomaterials, which enhances the rate of polymerization, leads to better performance of the geopolymer.
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Affiliation(s)
- Fatheali A. Shilar
- Department of Civil Engineering, Jain College of Engineering, Belagavi 590014, India;
| | - Sharanabasava V. Ganachari
- Department of Chemistry, School of Advanced Sciences, KLE Technological University, Hubballi 580031, India
- Correspondence: (S.V.G.); (T.M.Y.K.); Tel.: +91-836-2378295 (S.V.G.)
| | - Veerabhadragouda B. Patil
- Institute of Energetic Materials, Faculty of Chemical Technology, University of Pardubice, 53210 Pardubice, Czech Republic;
| | - T. M. Yunus Khan
- Research Center for Advanced Materials Science (RCAMS), King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia
- Mechanical Engineering Department, College of Engineering, King Khalid University, P.O. Box 394, Abha 61421, Saudi Arabia
- Correspondence: (S.V.G.); (T.M.Y.K.); Tel.: +91-836-2378295 (S.V.G.)
| | - Naif Mana Almakayeel
- Department of Industrial Engineering, College of Engineering, King Khalid University, Abha 62529, Saudi Arabia; (N.M.A.); (S.A.)
| | - Saleh Alghamdi
- Department of Industrial Engineering, College of Engineering, King Khalid University, Abha 62529, Saudi Arabia; (N.M.A.); (S.A.)
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Vavouraki AI, Gounaki I, Venieri D. Properties of Inorganic Polymers Based on Ground Waste Concrete Containing CuO and ZnO Nanoparticles. Polymers (Basel) 2021; 13:polym13172871. [PMID: 34502911 PMCID: PMC8433799 DOI: 10.3390/polym13172871] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Revised: 08/24/2021] [Accepted: 08/24/2021] [Indexed: 11/16/2022] Open
Abstract
The effect of copper oxide and zinc oxide nanoparticles (NPs) on the mechanical and thermal properties of ground waste concrete inorganic polymers (GWC IPs) has been investigated. NPs are added to GWC IPs at loadings of 0.1, 0.5, 1, and 2% w/w. The phase composition and microstructure of NPs GWC IPs have also been examined using X-ray diffraction (XRD), Raman spectroscopy and scanning electron microscope (SEM/EDS) techniques. Results show that the mechanical properties of GWC IPs are improved (23 MPa) due to addition of NPs (1% ZnO). In particular, GWC IPs embedded with 0.5% CuO and 1% ZnO NPs exhibited relatively improved compressive strength. The addition of NPs decreases the macroporosity and increases the mesoporosity of IPs matrix and decreases relatively the ability of IPs matrix to water absorption. The antimicrobial activity of GWC IPs doped with 0.5 and 1% CuO NPs against E. coli was also determined.
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Affiliation(s)
- Aikaterini I. Vavouraki
- School of Mineral Resources Engineering, University Campus, Technical University of Crete, GR-73100 Chania, Greece
- Department of Agriculture, School of Agricultural Science, Hellenic Mediterranean University, GR-71004 Heraklion, Greece
- Correspondence:
| | - Iosifina Gounaki
- School of Chemical and Environmental Engineering, University Campus, Technical University of Crete, GR-73100 Chania, Greece; (I.G.); (D.V.)
| | - Danae Venieri
- School of Chemical and Environmental Engineering, University Campus, Technical University of Crete, GR-73100 Chania, Greece; (I.G.); (D.V.)
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Characterization of chemical accelerators for sustainable recycling of fresh electric-arc furnace dust in cement pastes. ADV POWDER TECHNOL 2021. [DOI: 10.1016/j.apt.2021.06.019] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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Geopolymers and Fiber-Reinforced Concrete Composites in Civil Engineering. Polymers (Basel) 2021; 13:polym13132099. [PMID: 34202211 PMCID: PMC8272018 DOI: 10.3390/polym13132099] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Revised: 06/17/2021] [Accepted: 06/23/2021] [Indexed: 12/28/2022] Open
Abstract
This paper discusses the influence of fiber reinforcement on the properties of geopolymer concrete composites, based on fly ash, ground granulated blast furnace slag and metakaolin. Traditional concrete composites are brittle in nature due to low tensile strength. The inclusion of fibrous material alters brittle behavior of concrete along with a significant improvement in mechanical properties i.e., toughness, strain and flexural strength. Ordinary Portland cement (OPC) is mainly used as a binding agent in concrete composites. However, current environmental awareness promotes the use of alternative binders i.e., geopolymers, to replace OPC because in OPC production, significant quantity of CO2 is released that creates environmental pollution. Geopolymer concrete composites have been characterized using a wide range of analytical tools including scanning electron microscopy (SEM) and elemental detection X-ray spectroscopy (EDX). Insight into the physicochemical behavior of geopolymers, their constituents and reinforcement with natural polymeric fibers for the making of concrete composites has been gained. Focus has been given to the use of sisal, jute, basalt and glass fibers.
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Augustyniak A, Jablonska J, Cendrowski K, Głowacka A, Stephan D, Mijowska E, Sikora P. Investigating the release of ZnO nanoparticles from cement mortars on microbiological models. APPLIED NANOSCIENCE 2021. [DOI: 10.1007/s13204-021-01695-w] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
AbstractIncorporating zinc oxide nanoparticles (ZnO NPs) into cement mortars may provide additional functions, e.g., self-cleaning and antibacterial or electroconductive ability. However, these NPs are also known for their potential toxicity. During the life cycle of a cement mortar, various abrasive forces cause the release of admixtures to the natural environment. The effect of the released NPs on model microorganisms has not been extensively studied. Previous studies have shown that nanomaterials may affect various microorganisms’ physiological responses, including changes in metabolic activity, biofilming, or growth rate. In this study, we have focused on evaluating the response of model microorganisms, Escherichia coli, Pseudomonas aeruginosa, Staphylococcus aureus, and Candida albicans, towards ZnO nanoparticles released from cement mortars in different deterioration scenarios. The addition of ZnO nanoparticles to cement mortars had a noticeable effect on impeding the strength development. We have also detected that depending on the deterioration scenario, the release of ZnO nanoparticles was varied. Our studies have also shown that even though the release of nanoform ZnO could be limited by poor dispersion or the used filtration technique, the eluates have caused slight but statistically significant changes in the physiological features of studied microorganisms showing relatively low toxicity.
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Zhang K, Peng X, Cheng C, Zhao Y, Yu X. Preparation, characterization, and feasibility study of Sr/Zn-doped CPP/GNS/UHMWPE composites as an artificial joint component with enhanced hardness, impact strength, tribological and biological performance. RSC Adv 2021; 11:21991-21999. [PMID: 35480824 PMCID: PMC9034157 DOI: 10.1039/d1ra02401a] [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: 03/26/2021] [Accepted: 05/19/2021] [Indexed: 11/21/2022] Open
Abstract
In order to solve the problem of aseptic loosening of artificial joints resulting from the wear particles of artificial joint components in total joint replacement (TJR), we synthesized a new kind of metalo-organic particle (Sr/Zn-doped CPP/GNS) using spark plasma sintering (SPS) as a filler to enhance the comprehensive performance of UHMWPE. Sr/Zn-doped CPP/GNS was interfused evenly with UHMWPE particles and cured in a hot press instrument to prepare Sr/Zn-doped CPP/GNS/UHMWPE composites. FTIR and SEM were carried out to characterize Sr/Zn-doped CPP/GNS particles. EDS was carried out to characterize Sr/Zn-doped CPP/GNS/UHMWPE. The micro-structure, hardness, impact strength, tribology and bio-activities of Sr/Zn-doped CPP/GNS/UHMWPE composite materials were also investigated. The results confirmed the effectiveness of this method. The hardness, impact strength, and tribology of the composites were enhanced by adding homodispersed Sr/Zn-doped CPP/GNS particles into UHMWPE. In the meantime, Sr/Zn-doped CPP/GNS/UHMWPE composites could significantly promote the growth of osteoblasts due to the bio-activity of Sr/Zn-doped CPP/GNS. Furthermore, the addition of Sr/Zn-doped CPP/GNS particle-fillers into UHMWPE could promote the secretion of OPG from osteoblasts and inhibit the secretion of RANKL from osteoblasts, and thus increase the OPG/RANKL ratio. All the results above showed that Sr/Zn-doped CPP/GNS/UHMWPE composites with appropriate Sr/Zn-doped CPP/GNS content possessed superior physicochemical performances and bio-properties, and could be considered as promising materials to treat aseptic loosening in total joint replacement. A new kind of metalo-organic particle (Sr/Zn-doped CPP/GNS), synthesized using spark plasma sintering (SPS), was used as a filler to enhance the comprehensive performance of UHMWPE for applications in joint replacement.![]()
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Affiliation(s)
- Kaixuan Zhang
- College of Polymer Science and Engineering
- Sichuan University
- Chengdu 610065
- P. R. China
| | - Xu Peng
- Experimental and Research Animal Institute
- Sichuan University
- Chengdu 610065
- P. R. China
| | - Can Cheng
- College of Polymer Science and Engineering
- Sichuan University
- Chengdu 610065
- P. R. China
| | - Yang Zhao
- College of Polymer Science and Engineering
- Sichuan University
- Chengdu 610065
- P. R. China
| | - Xixun Yu
- College of Polymer Science and Engineering
- Sichuan University
- Chengdu 610065
- P. R. China
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Hakamy A. Influence of SiO 2 nanoparticles on the microstructure, mechanical properties, and thermal stability of Portland cement nanocomposites. JOURNAL OF TAIBAH UNIVERSITY FOR SCIENCE 2021. [DOI: 10.1080/16583655.2021.2011594] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- A. Hakamy
- Department of Physics, Umm Al-Qura University, Makkah, Saudi Arabia
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Šiler P, Kolářová I, Novotný R, Másilko J, Bednárek J, Janča M, Koplík J, Hajzler J, Matějka L, Marko M, Švec J, Zlámal M, Kuzielová E, Opravil T, Šoukal F. Use of Isothermal and Isoperibolic Calorimetry to Study the Effect of Zinc on Hydration of Cement Blended with Fly Ash. MATERIALS 2020; 13:ma13225215. [PMID: 33218145 PMCID: PMC7698924 DOI: 10.3390/ma13225215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/10/2020] [Revised: 10/31/2020] [Accepted: 11/16/2020] [Indexed: 12/05/2022]
Abstract
Increasing utilization of secondary raw materials and alternative fuels results in increasing contents of metals in cements. Zinc is one of these elements. It comes to cement with secondary raw materials such as slag or fly ash or by the utilization of used tires as an alternative fuel. Zinc ions significantly prolong the hydration process in cement. This work deals with the influence of zinc ions in the form of very poorly soluble ZnO salt and easily soluble ZnCl2 and Zn(NO3)2 on the hydration of cement blended with fly ash. Zinc was dosed in the range of 0.05%, 0.1%, 0.5% and 1% of cement weight. The effect of zinc on hydration was monitored by isothermal and isoperibolic calorimetry. A 15% addition of fly ash to cement mainly causes further retardation of hydration reactions due to the reactions of fly ash particles with Ca2+ ions from cement. The strongest effect on the hydration retardation from all investigated compounds showed in ZnO as it dissolves very slowly. On the contrary, for the dosage of 1% of zinc in the form of ZnCl2 significant acceleration of hydration occurred. In this work, a synergistic effect on the prolongation of hydration with a combination of cement, zinc and fly ash was demonstrated. The lengths of induction periods were assessed from detected calorimetric curves and from these lengths the curves were gained by fitting with the exponential function. Final products were next analyzed using X-ray diffraction.
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Affiliation(s)
- Pavel Šiler
- Materials Research Centre, Faculty of Chemistry, Brno University of Technology, CZ-61200 Brno, Czech Republic; (I.K.); (R.N.); (J.M.); (M.J.); (J.K.); (J.H.); (L.M.); (M.M.); (T.O.); (F.Š.)
- Correspondence: ; Tel.: +42-06-0353-4081
| | - Iva Kolářová
- Materials Research Centre, Faculty of Chemistry, Brno University of Technology, CZ-61200 Brno, Czech Republic; (I.K.); (R.N.); (J.M.); (M.J.); (J.K.); (J.H.); (L.M.); (M.M.); (T.O.); (F.Š.)
| | - Radoslav Novotný
- Materials Research Centre, Faculty of Chemistry, Brno University of Technology, CZ-61200 Brno, Czech Republic; (I.K.); (R.N.); (J.M.); (M.J.); (J.K.); (J.H.); (L.M.); (M.M.); (T.O.); (F.Š.)
| | - Jiří Másilko
- Materials Research Centre, Faculty of Chemistry, Brno University of Technology, CZ-61200 Brno, Czech Republic; (I.K.); (R.N.); (J.M.); (M.J.); (J.K.); (J.H.); (L.M.); (M.M.); (T.O.); (F.Š.)
| | - Jan Bednárek
- Institute of Environmental Technology, Technical University of Ostrava, CZ-70800 Ostrava, Czech Republic;
| | - Martin Janča
- Materials Research Centre, Faculty of Chemistry, Brno University of Technology, CZ-61200 Brno, Czech Republic; (I.K.); (R.N.); (J.M.); (M.J.); (J.K.); (J.H.); (L.M.); (M.M.); (T.O.); (F.Š.)
| | - Jan Koplík
- Materials Research Centre, Faculty of Chemistry, Brno University of Technology, CZ-61200 Brno, Czech Republic; (I.K.); (R.N.); (J.M.); (M.J.); (J.K.); (J.H.); (L.M.); (M.M.); (T.O.); (F.Š.)
| | - Jan Hajzler
- Materials Research Centre, Faculty of Chemistry, Brno University of Technology, CZ-61200 Brno, Czech Republic; (I.K.); (R.N.); (J.M.); (M.J.); (J.K.); (J.H.); (L.M.); (M.M.); (T.O.); (F.Š.)
| | - Lukáš Matějka
- Materials Research Centre, Faculty of Chemistry, Brno University of Technology, CZ-61200 Brno, Czech Republic; (I.K.); (R.N.); (J.M.); (M.J.); (J.K.); (J.H.); (L.M.); (M.M.); (T.O.); (F.Š.)
| | - Michal Marko
- Materials Research Centre, Faculty of Chemistry, Brno University of Technology, CZ-61200 Brno, Czech Republic; (I.K.); (R.N.); (J.M.); (M.J.); (J.K.); (J.H.); (L.M.); (M.M.); (T.O.); (F.Š.)
| | - Jiří Švec
- Faculty of Civil Engineering, Institute of Concrete and Masonry Structures, Brno University of Technology, CZ-60200 Brno, Czech Republic; (J.Š.); (M.Z.)
| | - Martin Zlámal
- Faculty of Civil Engineering, Institute of Concrete and Masonry Structures, Brno University of Technology, CZ-60200 Brno, Czech Republic; (J.Š.); (M.Z.)
| | - Eva Kuzielová
- Institute of Construction and Architecture, Slovak Academy of Sciences, SK-845 03 Bratislava, Slovak;
| | - Tomáš Opravil
- Materials Research Centre, Faculty of Chemistry, Brno University of Technology, CZ-61200 Brno, Czech Republic; (I.K.); (R.N.); (J.M.); (M.J.); (J.K.); (J.H.); (L.M.); (M.M.); (T.O.); (F.Š.)
| | - František Šoukal
- Materials Research Centre, Faculty of Chemistry, Brno University of Technology, CZ-61200 Brno, Czech Republic; (I.K.); (R.N.); (J.M.); (M.J.); (J.K.); (J.H.); (L.M.); (M.M.); (T.O.); (F.Š.)
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