scholarly journals Influence of pH on Structural, Morphological, Optical, Photocatalytic, and Antibacterial Properties of Yttrium Oxide Nanoparticles via Co-Precipitation Method

2021 ◽  
Author(s):  
Kiruthika Parangusan ◽  
Venkat Subramanium ◽  
Lakshmanaperumal Sundarabharathi ◽  
Karthik Kannan ◽  
Devi Radhika
Keyword(s):  
Yttrium Oxide ◽  
Antibacterial Properties ◽  
Blue Emission ◽  
Precipitation Method ◽  
Diffusion Method ◽  
Bandgap Energy ◽  
Oxide Nanoparticles ◽  
Ph Values ◽  
Co Precipitation ◽  
Yttrium Oxide Nanoparticles

Abstract Yttrium oxide nanoparticles with multiform morphologies have been synthesized by the co-precipitation method. The structure, morphology, functional groups, optical and photoluminescence properties were examined through X-ray diffraction (XRD), Scanning electron microscope (SEM), Fourier transform infrared spectrometer (FTIR), UV-Visible (UV-Vis), Photoluminescence spectra (PL). The XRD patterns obtained for the samples synthesized at various pH values confirmed the cubic structure of Y2O3. The patterns obtained on the samples at pH values of 8 and 9 appeared as have sharp peaks suggested, that the samples were well crystallized. From UV-vis spectra, it revealed that the bandgap energy exhibits a blue shift in the absorption edge for the samples with the increase of pH due to their changing morphologies and surface structures. In the PL spectra, the obtained Y2O3 samples demonstrate an intense and bright UV and blue emission under the excitation wavelength range of 250 nm. The photocatalytic degradation of the Y2O3 nanostructure was studied against the Methylene blue (MB) dye under sunlight irradiation. The results showed good recital under solar light irradiation. Further, the antimicrobial activities of Y2O3 nanostructure against foodborne pathogens (Staphylococcus aureus and Salmonella typhi) were examined by using the disc diffusion method. Moreover, the Y2O3 nanostructure was found to be biocompatible.

ESTIMATION OF LATTICE STRAIN, STRESS, ENERGY DENSITY AND CRYSTALLITE SIZE OF THE SPHERICAL YTTRIUM OXIDE NANOPARTICLES

2009 ◽  
Vol 02 (03) ◽  
pp. 131-134 ◽  
Author(s):  
R. SRINIVASAN ◽  
N. RAJESWARI YOGAMALAR ◽  
R. JUSTIN JOSEYPHUS ◽  
A. CHANDRA BOSE
Keyword(s):  
Energy Density ◽  
Crystallite Size ◽  
Yttrium Oxide ◽  
Lattice Strain ◽  
Precipitation Method ◽  
Oxide Nanoparticles ◽  
X Ray Diffraction ◽  
X Ray ◽  
Strain Model ◽  
Yttrium Oxide Nanoparticles

Yttria nanoparticles are synthesized by co-precipitation method and as-prepared nanoparticles are annealed at various temperatures. The as-prepared and annealed particles are characterized by X-ray diffraction and transmission electron microscope (TEM). Here we estimated the lattice strain, crystallite size, deformation stress, and deformation energy density for annealed (800°C) yttrium oxide nanoparticles by Williamson-Hall-Isotropic Strain Model (W-H-ISM), W-H-Anisotropic Strain Model (W-H-ASM) and W-H-Energy Density Model (W-H-EDM) based on W-H plot from powder X-ray diffraction data. The shape and size of the nanoparticles are determined using TEM. The results of the estimated crystallite size of yttria nanoparticles by various methods agreed with the TEM results.

scholarly journals Synthesis and Characterization of Dextran coated Iron Oxide Nanoparticles as a T1 Contrast Agent

2021 ◽  
Vol 2114 (1) ◽  
pp. 012037
Author(s):  
Z Ra’ad ◽  
L Q Al-Karam ◽  
N K Abid Alsahib
Keyword(s):  
Iron Oxide ◽  
Contrast Agent ◽  
Contrast Enhancement ◽  
Iron Oxide Nanoparticles ◽  
Precipitation Method ◽  
Oxide Nanoparticles ◽  
Ph Values ◽  
T1 Contrast Agent ◽  
T1 Contrast ◽  
Co Precipitation

Abstract This is a second part of iron oxide nanoparticles synthesis by co-precipitation method with various PH values. This study includes stabilizing iron oxide nanoparticles with dextran of molecular weight 10000 Da by aqueous route, then study its characteristics with AFM, FTIR and VSM also using the stabilized material as a contrast agent in T1-weighted image then compare the contrast enhancement with gadolinium based commercially available contrast agent (MagnevistTM). Ph values were (7,11,14), all samples were injected to mice bodies then imaged with MRI best result of T1 contrast enhancement was obtained from sample with Ph 14 compared with gadolinium-based T1 contrast agent with no toxic effects.

Thermodynamic and anticancer properties of inorganic zinc oxide nanoparticles synthesized through co-precipitation method

2021 ◽  
Vol 330 ◽  
pp. 115602
Author(s):  
Seyyed Vahid Mousazad Goorabjavari ◽  
Fateme Golmohamadi ◽  
Saba Haririmonfared ◽  
Hosein Ahmadi ◽  
Soheil Golisani ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Zinc Oxide Nanoparticles ◽  
Precipitation Method ◽  
Oxide Nanoparticles ◽  
Anticancer Properties ◽  
Co Precipitation

scholarly journals Cytotoxicity and genotoxicity caused by yttrium oxide nanoparticles in HEK293 cells

2014 ◽  
pp. 1379 ◽  
Author(s):  
Vellaisamy Selvaraj ◽  
Sravanthi Bodapati ◽  
Elizabeth Murray ◽  
Eric Blough ◽  
Nicole Winston ◽  
...  
Keyword(s):  
Yttrium Oxide ◽  
Hek293 Cells ◽  
Oxide Nanoparticles ◽  
Yttrium Oxide Nanoparticles

Biological activity of gum Arabic-coated ferrous oxide nanoparticles

2021 ◽  
pp. 2150411
Author(s):  
Rania Hasan Huseen ◽  
Ali A. Taha ◽  
Ihab Q. Ali ◽  
Oday Mahmmod Abdulhusein ◽  
Selma M. H. Al-Jawad
Keyword(s):  
Iron Oxide ◽  
Cell Line ◽  
Biological Activities ◽  
Low Cost ◽  
Gum Arabic ◽  
Precipitation Method ◽  
Oxide Nanoparticles ◽  
Electron Microscopic ◽  
Co Precipitation ◽  
Mcf 7

In this study, iron oxide nanoparticles (NPs) had been prepared by co-precipitation method. In order to reduce their toxicity and increase stability, prepared iron oxide was coated with gum Arabic. Gum Arabic is preferred over synthetic materials due to their non-toxicity, low cost and availability. Characterization of coated and non-coated iron oxide NPs had been performed by spectrophotometer, Fourier transfer infra-red spectrophotometer (FTIR), Zeta potential, X-ray diffraction (XRD) and field emission scanning electron microscopic (FE-SEM). The fabricated nanoparticles appeared purity and crystalline nature by XRD, with diameter average of 27.01 nm and 55.12 nm for iron oxide NPs and iron oxide NPs coated with gum Arabic, respectively. On the other hand, four biological activities of coated and non-coated iron oxide had been investigated. High removal of methylene blue pollutant dye (46%) was observed with iron oxide NPs, while removal percentage was 22.6 performed by iron oxide NPs coated with gum Arabic within 72 h. Iron oxide NPs revealed high inhibition zones of 27.5 nm and 30 mm, at 1000 [Formula: see text]g/ml, against S. aureus and E. coli, respectively, while coated iron oxide NPs with gum Arabic revealed low antibacterial activity against both examined bacteria even when used at 1000 [Formula: see text]g/ml. The hemolytic activity of prepared NPs had been determined. The hemolytic percentage was increased whenever concentrations of nanoparticles increased. Lower hemolytic percentages were 69.76 and 50.98 for iron oxide NPs and iron oxide NPs coated with gum Arabic were observed at a concentration of 250 [Formula: see text]g/ml. Finally, cytotoxic activity was estimated against MCF-7 cell line and normal cell line WRL68 by MTT assay. A decrease in MCF-7 viability to 65.1% was observed when 400 [Formula: see text]g/ml of iron oxide NPs was used, while WRL68 viability was 75.03%. Iron oxide NPs coated with gum Arabic revealed significant reduction in MCF-7 and WRL68 viability to 69.90% and 80.05%, respectively, when 400 [Formula: see text]g/ml of nanoparticles was applied.

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