Gamma Irradiation-Assisted Synthesis of Silver Nanoparticle-Embedded Graphene Oxide-TiO2 Nanotube Nanocomposite for Organic Dye Photodegradation

Vu, Duy Khang Nguyen; Nguyen, Dang Khoa

doi:10.1155/2021/6679637

Cited by 5 publications

(4 citation statements)

References 63 publications

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“…Gamma-ray radiation is a physical method used for metallic nanoparticles synthesis [ 34 ]. Thi Kim Lan Nguyen and coworkers [ 35 ] reported the synthesis of platinum nanoparticles by gamma-ray radiation using chitosan as a stabilizer, while Duy Khang Nguyen Vu et al successfully synthesized a silver nanoparticle embedded in graphene oxide/TiO 2 nanotube nanocomposite using this method [ 36 ]. Different types of metal and metallic oxides NPs can be obtained by this method, representing one of the “green” synthesis methods.…”

Section: Synthesis Of Metallic Nanoparticlesmentioning

confidence: 99%

Metallic and Metal Oxides Nanoparticles for Sensing Food Pathogens—An Overview of Recent Findings and Future Prospects

et al. 2022

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Nowadays, special importance is given to quality control and food safety. Food quality currently creates significant problems for the industry and implicitly for consumers and society. The effects materialize in economic losses, alterations of the quality and organoleptic properties of the commercial products, and, last but not least, they constitute risk factors for the consumer’s health. In this context, the development of analytical systems for the rapid determination of the sanitary quality of food products by detecting possible pathogenic microorganisms (such as Escherichia coli or Salmonella due to the important digestive disorders that they can cause in many consumers) is of major importance. Using efficient and environmentally friendly detection systems for identification of various pathogens that modify food matrices and turn them into food waste faster will also improve agri-food quality throughout the food chain. This paper reviews the use of metal nanoparticles used to obtain bio nanosensors for the purpose mentioned above. Metallic nanoparticles (Au, Ag, etc.) and their oxides can be synthesized by several methods, such as chemical, physical, physico-chemical, and biological, each bringing advantages and disadvantages in their use for developing nanosensors. In the “green chemistry” approach, a particular importance is given to the metal nanoparticles obtained by phytosynthesis. This method can lead to the development of good quality nanoparticles, at the same time being able to use secondary metabolites from vegetal wastes, as such providing a circular economy character. Considering these aspects, the use of phytosynthesized nanoparticles in other biosensing applications is also presented as a glimpse of their potential, which should be further explored.

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Section: Synthesis Of Metallic Nanoparticlesmentioning

confidence: 99%

Metallic and Metal Oxides Nanoparticles for Sensing Food Pathogens—An Overview of Recent Findings and Future Prospects

et al. 2022

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“…Depending on the intended use, Ag NPs can be produced simply and in a variety of ways including chemical, physical, and biological preparations [12,19]. Gamma-irradiation is an important physical method for their preparation [20,21]. Polyvinylpyrrolidone (PVP) is used as stabilizer, reducing agent, and capping agent [22].…”

Section: Introductionmentioning

confidence: 99%

“…Secondly, primary nanoparticles, which are aggregation of silver atoms, are formed. Lastly, secondary Ag NPs are produced when primary Ag NPs interact with PVP or fuse together to form larger aggregates [19][20][21][22]. Huang et al [23] prepared PANI/Ag NC by dissolving AgNO 3 and aniline in HNO 3 solution.…”

Section: Introductionmentioning

confidence: 99%

Thermal, electrical, optical, and antimicrobial studies of PANI/Ag nanocomposites synthesized by polymerization of aniline on γ-irradiated and PVP-capped Ag colloid

Morsi,

Mohsen,

El-Sherif

et al. 2024

Preprint

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A simple and new way was used to modify the thermal, electrical, optical, and antimicrobial properties of conductive polyaniline by embedding a nanosized metallic material in the polymeric matrix. The sequence of fabrication was as follows: first, preparing a silver colloid by gamma-irradiating the precursor and then, aniline monomer was polymerized in the colloid using different molarities of the dopant and the silver itself. The mentioned properties of Ag colloid and the conductive polymer / Ag nanocomposites (NCs) were studied using TGA, electrical measurements, UV-Vis spectroscopy, FTIR, TEM, SEM, DLS, SAED, and EDX. The particle size distribution of the Ag colloid is ranged from 7 to 17 nm. The results showed an increase in the D.C conductivity of NCs thin films with increasing of dopant. All the prepared NCs exhibited medium to high antibacterial activity against Escherichia coli and Staphylococcus aureus reaching the maximum efficiency at PANI: Ag: dopant molar ratio of 1:1:0.83. Also, an electrostatic interaction has been generated between the conductive PANI chains and the free electrons around Ag NPs leading to a conjugating electron cloud in the produced NCs. This electronic behavior facilitates the use of the prepared NCs as supercapacitors, sensors, photocatalysts, or antibacterial materials.

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“…Ueno et al argues in favor of gamma-irradiation to regain the hydrophilicity and bioactivity of titanium implants that are lost over time owing to hydrocarbon deposition from the atmosphere [ 6 ]. However, a 25–35 kGy dose of gamma irradiation, which is generally used for the sterilization of titanium implants, might cause irreversible alteration to the TiO 2 nanosurfaces as has been the case in other nanoparticles of various materials [ 7 , 8 ]. Thermal treatment can also temporarily increase the hydrophilicity of titanium implants, but the effect often decreases over time, and the heat may modify the surface morphology [ 9 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

Enhancement of Hydrophilicity of Nano-Pitted TiO2 Surface Using Phosphoric Acid Etching

et al. 2023

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Our research group developed a novel nano-pitted (NP) TiO2 surface on grade 2 titanium that showed good mechanical, osteogenic, and antibacterial properties; however, it showed weak hydrophilicity. Our objective was to develop a surface treatment method to enhance the hydrophilicity of the NP TiO2 surface without the destruction of the nano-topography. The effects of dilute and concentrated orthophosphoric (H3PO4) and nitric acids were investigated on wettability using contact angle measurement. Optical profilometry and atomic force microscopy were used for surface roughness measurement. The chemical composition of the TiO2 surface and the oxidation state of Ti was investigated using X-ray photoelectron spectroscopy. The ccH3PO4 treatment significantly increased the wettability of the NP TiO2 surfaces (30°) compared to the untreated control (88°). The quantity of the absorbed phosphorus significantly increased following ccH3PO4 treatment compared to the control and caused the oxidation state of titanium to decrease (Ti4+ → Ti3+). Owing to its simplicity and robustness the presented surface treatment method may be utilized in the industrial-scale manufacturing of titanium implants.

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Gamma Irradiation-Assisted Synthesis of Silver Nanoparticle-Embedded Graphene Oxide-TiO2 Nanotube Nanocomposite for Organic Dye Photodegradation

Cited by 5 publications

References 63 publications

Metallic and Metal Oxides Nanoparticles for Sensing Food Pathogens—An Overview of Recent Findings and Future Prospects

Metallic and Metal Oxides Nanoparticles for Sensing Food Pathogens—An Overview of Recent Findings and Future Prospects

Thermal, electrical, optical, and antimicrobial studies of PANI/Ag nanocomposites synthesized by polymerization of aniline on γ-irradiated and PVP-capped Ag colloid

Enhancement of Hydrophilicity of Nano-Pitted TiO2 Surface Using Phosphoric Acid Etching

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