scholarly journals Synthesis and Characterization of Novel Fe3O4/PVA/Eggshell Hybrid Nanocomposite for Photodegradation and Antibacterial Activity

2021 ◽  
Vol 5 (10) ◽  
pp. 267
Author(s):  
Piyush Kumar Gupta ◽  
Senthilkumar Palanisamy ◽  
Tamilarasi Gopal ◽  
Ranjithkumar Rajamani ◽  
Soumya Pandit ◽  
...  
Keyword(s):  
Biomedical Applications ◽  
Crystal Size ◽  
Antibacterial Property ◽  
Spherical Shape ◽  
Hybrid Nanocomposites ◽  
Eggshell Membrane ◽  
Hybrid Nanocomposite ◽  
Tem Analysis ◽  
Sunlight Irradiation

In the 21st century, hybrid nanocomposites were widely used in bioelectronic, biosensing, photocatalytic, and biomedical applications. In the present study, we fabricated a novel Fe3O4/PVA/Eggshell hybrid nanocomposite and physicochemically characterized it using powder XRD, EDS, FTIR, VSM, and HR-TEM analysis. The XRD spectrum revealed the crystalline and FCC configuration of Fe3O4 NPs with average crystal size of 16.28 nm, and the HRTEM image indicates the prepared hybrid nanocomposite is of spherical shape with less agglomeration. This hybrid nanocomposite showed a significant photodegradation property in degrading organic pollutants such as congo red and crystal violet dyes under the sunlight irradiation. In addition, the hybrid nanocomposite also displayed a potent antibacterial property against different Gram +ve and Gram −ve bacterial pathogens. This study provides a significant example in the overview of fabrication of cost effectively, eco-friendly, and multiple-application hybrid nanocomposites through eggshell membrane fibers.

Synthesis and characterization of an AgI/Ag hybrid nanocomposite with surface-enhanced Raman scattering performance and photocatalytic activity

RSC Advances ◽  
2014 ◽  
Vol 4 (70) ◽  
pp. 37187-37192 ◽  
Author(s):  
Qingli Huang ◽  
Shengping Wen ◽  
Xiashi Zhu
Keyword(s):  
Photocatalytic Activity ◽  
Raman Scattering ◽  
Hybrid Nanocomposites ◽  
Synthesis And Characterization ◽  
Hybrid Nanocomposite ◽  
Surface Enhanced ◽  
Excellent Photocatalytic Activity ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

Novel AgI/Ag hybrid nanocomposites with good SERS performance and excellent photocatalytic activity were prepared.

Synthesis and Characterization of Biomass Supported Ag, Co and Ag-Co Nanoparticles

2016 ◽  
Vol 857 ◽  
pp. 480-484
Author(s):  
Nur Izzati Mohd Anuar ◽  
Jeyashelly Andas
Keyword(s):  
Oxidation State ◽  
Silica Surface ◽  
Sol Gel ◽  
Spherical Shape ◽  
Synthesis And Characterization ◽  
Tem Analysis ◽  
Mean Size ◽  
Ft Ir ◽  
Co Nanoparticles

Silica extracted from rice husk was used as a support to synthesize the monometallic Ag, Co and bimetallic Ag-Co nanoparticles. The nanoparticles were prepared via a sol-gel method by adding glucose as the reducing agent. The prepared nanoparticles were designated as Ag-NP, Co-NP and AgCo-NP. The successful incorporation of Ag/Co onto the silica surface were evidenced by TEM, FT-IR and DR/UV-Vis analysis. The TEM analysis showed the presence of small spherical shape nanoparticles with an average mean size of 3.18-3.57 nm. Through DR/UV-Vis analysis, the presence of Ag+ and cobalt in the oxidation state of +2 and +3 were confirmed, while FT-IR verified the presence of M-O and Si-O-M+ bond.

scholarly journals Optical and structural characterization of oleic acid-stabilized CdTe nanocrystals for solution thin film processing

2014 ◽  
Vol 5 ◽  
pp. 881-886 ◽  
Author(s):  
Claudio Davet Gutiérrez-Lazos ◽  
Mauricio Ortega-López ◽  
Manuel A Pérez-Guzmán ◽  
A Mauricio Espinoza-Rivas ◽  
Francisco Solís-Pomar ◽  
...  
Keyword(s):  
Thin Film ◽  
Oleic Acid ◽  
Structural Characterization ◽  
Spherical Shape ◽  
Secondary Phase ◽  
Colloidal Dispersion ◽  
Face Centered Cubic ◽  
Tem Analysis ◽  
Cdte Nanocrystals

This work presents results of the optical and structural characterization of oleic acid-stabilized cadmium telluride nanocrystals (CdTe-NC) synthesized by an organometallic route. After being cleaned, the CdTe-NC were dispersed in toluene to obtain an ink-like dispersion, which was drop-cast on glass substrate to deposit a thin film. The CdTe-NC colloidal dispersion as well as the CdTe drop-cast thin films were characterized with regard to the optical and structural properties. TEM analysis indicates that the CdTe-NC have a nearly spherical shape (3.5 nm as mean size). Electron diffraction and XRD diffraction analyses indicated the bulk-CdTe face-centered cubic structure for CdTe-NC. An additional diffraction line corresponding to the octahedral Cd3P2 was also detected as a secondary phase, which probably originates by reacting free cadmium ions with trioctylphosphine (the tellurium reducing agent). The Raman spectrum exhibits two broad bands centered at 141.6 and 162.3 cm−1, which could be associated to the TO and LO modes of cubic CdTe nanocrystals, respectively. Additional peaks located in the 222 to 324 cm−1 range, agree fairly well with the wavenumbers reported for TO modes of octahedral Cd3P2.

Synthesis and Characterization of PVDF-Based SWNT/GO Hybrid Films

2012 ◽  
Author(s):  
Nirmal Shankar Sigamani ◽  
Zoubeida Ounaies ◽  
Henry Sodano
Keyword(s):  
Polyvinylidene Fluoride ◽  
Room Temperature ◽  
Breakdown Strength ◽  
Hybrid Nanocomposites ◽  
Hybrid Nanocomposite ◽  
Frequency Range ◽  
Hybrid Films ◽  
Walled Carbon Nanotubes ◽  
Pure Pvdf

Hybrid nanocomposites with single walled carbon nanotubes (SWNT) and graphene oxide (GO) as nanofillers and polyvinylidene fluoride (PVDF) as a polymer were synthesized as potential electronic active polymers (EAPs) with high breakdown strength. A co-solvent method was developed to achieve exfoliation and dispersion of GO in PVDF. The microstructure of the PVDF was found to be predominantly γ phase. Percent crystallinity of PVDF increased due to the addition of the hybrid nanofillers. And, at room temperature, the storage modulus is increased by 56.26% over the pure PVDF. The dielectric constant increased from ∼7 to ∼25 for the hybrid nanocomposites as compared to pure PVDF at 1KHz measurement frequency. Dielectric loss of the hybrid nanocomposite is found less than 0.6 for the frequency range from 20 Hz–1MHz. Electrical conductivity of the hybrid nanocomposite increase by nearly two orders of magnitude at 1KHz when compared to pure PVDF. The effect of the presence of these hybrid nanofillers on microstructure and properties of PVDF are discussed.

Nanoemulsion Synthesis of Magnetic-Optical CoNiAu Nanoparticles

2014 ◽  
Vol 904 ◽  
pp. 90-94
Author(s):  
Hong Qin Shao ◽  
Zheng Guan ◽  
Jun Hua Wu ◽  
Hong Ling Liu
Keyword(s):  
Magnetic Properties ◽  
Biomedical Applications ◽  
Room Temperature ◽  
Vibrating Sample Magnetometry ◽  
Tem Analysis ◽  
X Ray ◽  
Near Ir ◽  
Transmission Electron ◽  
Optical And Magnetic Properties

Multi-functional CoNiAu nanoparticles were successfully synthesized via nanoemulsion method with the use of PEO-PPO-PEO as the surfactant, C14H29CH(OH)CH2OH as the reducing agent, Ni (acac)2, Co (acac)2 and Au (ac)3 as precursors. The characterization of the CoNiAu nanoparticles was performed using X-ray powder diffraction (XRD), fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), vibrating sample magnetometry (VSM) and UV-vis near IR spectrophotometer (UV-vis). The XRD and TEM analysis confirm the formation and structure of the nanoparticles. The UV-vis and VSM measurements display the optical and magnetic properties of the CoNiAu nanoparticles at the room temperature. The CoNiAu nanoparticles with the well defined optical and magnetic properties are promised for optical, magnetic, catalytic and biomedical applications.

TEM sample preparation and analysis of single-crystalline Si spheres

1994 ◽  
Vol 52 ◽  
pp. 876-877
Author(s):  
Kim M. Jones
Keyword(s):  
Solar Cell ◽  
Sample Preparation ◽  
Spherical Shape ◽  
Tem Analysis ◽  
Thin Sections ◽  
Transmission Electron ◽  
Sample Preparation Procedure ◽  
Refinement Process ◽  
Main Components

In parallel with the technological advancements in the field of Transmission Electron Microscopy (TEM), numerous innovations in TEM sample preparation have also transpired. Innovations in polishing techniques, ion etching, and ultramicrotomy have not only expanded the types of materials that are being investigated with TEM, but have also improved the quality of the thin sections that are examined. Described in this paper is a sample preparation procedure that was developed in order to prepare small Si spheres for TEM analysis. Metallurgical-grade Si is the starting material used in the productionof the spheres. The Si spheres are the main components in the Spheral Solar Cell technology developed by Texas Instruments. The solar cell configuration is shown schematically in Fig. 1. The spheresaresubjected to a number of refinement steps, for example: denuding, gettering, and annealing in order to achieve a purity that is suitable for solar cell fabrication. TEM characterization of the Si spheres was performed at various stages in the refinement process. The spherical shape and size (ave. dia.=0.75 mm) of the Si pose a challenge for TEM sample preparation.

scholarly journals Fabrication and Characterization of Injectable Biomaterials for Biomedical Applications

2011 ◽  
Vol 383-390 ◽  
pp. 4065-4069
Author(s):  
A. Champa Jayasuriya ◽  
Kristalyn J. Mauch ◽  
Nabil A. Ebraheim
Keyword(s):  
Bone Regeneration ◽  
Biomedical Applications ◽  
Size Range ◽  
Sodium Tripolyphosphate ◽  
Spherical Shape ◽  
Dead Cell ◽  
Cross Links ◽  
Phosphate Buffered Saline ◽  
Phosphate Groups

The aim of this study is to evaluate the injectable cross-linked chitosan (CS) microparticles (MPs) to apply for biomedical applications specifically for bone regeneration. The CS MPs were fabricated by emulsification method and formed the cross-links between the amide groups in the CS and phosphate groups in the sodium tripolyphosphate (TPP) ionic cross-linking agent. The MPS were analyzed for morphology by Scanning Electron Microscope (SEM). The fabricated CS MPs were in the spherical shape with the size range of 20-100 m. These CS MPs were analyzed for biodegradation by immersing in phosphate buffered saline (PBS, pH = 7.4) at 37°C for 30 weeks. The biodegradation of CS MPs in PBS was initiated at week 25. Mesenchymal stem cells (MSCs) were harvested from the bone marrow of mice tibia and femurs. The MSC attachment on CS MPs was tested using LIVE/DEAD cell sassy with a Fluorescence Microscope. The murine MSCs attachment onto CS MPs at day 2 was confirmed by visualizing fluorescence images. The CS MPs were also analyzed for the injectability and retainability at the site using a subcutaneous injection in a rat model. The fabricated CS MPs possess injectability, biodegradability and biocompatibility. Therefore, these CS MPs have a great potential to apply for various biomedical applications including bone regeneration by injection.

Preparation and Characterization of Chitosan-Based Scaffolds for Biomedical Applications

2006 ◽  
Vol 514-516 ◽  
pp. 1005-1009 ◽  
Author(s):  
José V. Araújo ◽  
J.A. Lopes da Silva ◽  
Margarida M. Almeida ◽  
Maria Elisabete V. Costa
Keyword(s):  
Biomedical Applications ◽  
Freeze Drying ◽  
Average Pore Size ◽  
Composite Scaffolds ◽  
Average Pore ◽  
Chitosan Matrix ◽  
Freeze Dried ◽  
Porous Chitosan ◽  
Interconnected Structure

Porous chitosan/brushite composite scaffolds were prepared by a freeze-drying technique, starting from brushite suspensions in chitosan solutions. The obtained scaffolds showed a regular macroporous and interconnected structure with brushite particles uniformly distributed in the chitosan matrix. The variation of the brushite concentration affected the microstructure of the final freeze-dried scaffold, in particular, its porosity and its average pore size. The yield strengths of the composite scaffolds could also be improved by the increase of the brushite content.

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