Preparation and Characterization of MgO Nanoparticles by Sol–Gel Method

2018 ◽  
Vol 24 (8) ◽  
pp. 5708-5711
Author(s):  
Nikhar Khanna ◽  
A. Ruban Kumar
Keyword(s):  
Surface Passivation ◽  
Sol Gel ◽  
Phase Method ◽  
Gel Method ◽  
X Ray ◽  
Sol Gel Method ◽  
Ir Studies ◽  
Liquid Phase Method ◽  
Ft Ir ◽  
Size And Morphology

Liquid phase method (sol–gel method) was employed to synthesize MgO nanparticles. The particles were subjected to structural, morphological and optical property studies. X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform Infrared Spectroscopy (FT-IR), UV-Vis Spectrophotometer were employed to characterize the given sample. The X-ray pattern obtained had no impurity peak, revealing high purity of the sample. The particle size and morphology were investigated by SEM. EDS and FT-IR studies were done for knowing the composition and surface passivation respectively of the prepared sample. The estimation of the band-gap was carried out by UV-vis absorption spectra.

The Properties of YSZ-Ni-Cr Cermet Fabricated by Sol-Gel Method

2012 ◽  
Vol 535-537 ◽  
pp. 787-790
Author(s):  
Shu Lan Guo ◽  
Min Wang ◽  
Su Hua Lv ◽  
Jia Li ◽  
Xian Chang Du
Keyword(s):  
Particle Size ◽  
Sol Gel ◽  
Hot Press ◽  
Gel Method ◽  
X Ray ◽  
Sol Gel Method ◽  
Particle Size And Morphology ◽  
Size And Morphology ◽  
Increasing Temperature ◽  
Hot Press Sintering

The properties of YSZ-Ni-Cr cermet fabricated by Sol-Gel Method（YSZ-Ni-Cr powder was synthesized by coprecipitation method at 850°C for 2 h and was processed into YSZ-Ni-Cr cermet by hot-press sintering at 1350°C for 1 h）was explored. The identification of phases was carried out using a X-ray diffractometer (XRD). The particle size and morphology was determined by electron microscopys(SEM/TEM) The conductivity had a tendency to decrease with increasing temperature. This behavior can be accounted for that there are two conduction paths through the cermet, an electronic path through the (Ni,Cr) metal phase and an ionic path through the ZrO2-Y2O3 phase.

scholarly journals Synthesis of Metal Doped TiO2 Nano-Composites by Sol-Gel Method and Their Structural Properties

2020 ◽  
Vol 6 (3) ◽  
pp. 915-917
Author(s):  
Rajani Altaf ◽  
Sharma Jyoti ◽  
Dave Pranav
Keyword(s):  
Metal Oxide ◽  
Sol Gel ◽  
Nano Composites ◽  
Gel Method ◽  
Doped Tio2 ◽  
Sol Gel Method ◽  
Ir Studies ◽  
Good Crystallinity ◽  
Ft Ir ◽  
Metal Doped

Metal oxide nano-composites plays a very important role in many areas of chemistry, physics and material science. This paper explains the synthesis and comparison of zinc and zirconium doped TiO2 metal oxide nano-composites and their different properties. Here the sol-gel method is used to synthesis both the nano-composites. Nano-composites have been characterized with XRD, AFM, Zetasizer & potential and FT-IR studies. XRD study revealed good crystallinity with the size range of 30 nm – 45 nm for both nano-composites. AFM studies also revealed the same. FTIR study reports the characteristics peaks of synthesised nano-composites.

N, Fe Co-Doped TiO2 Photocatalyst Preparation by Sol-Gel Method with Visible Light Response

2013 ◽  
Vol 726-731 ◽  
pp. 673-676 ◽  
Author(s):  
Ping Yu ◽  
Shan Shan Wang ◽  
Huan Huan Li ◽  
Wen Xiu Li
Keyword(s):  
Sol Gel ◽  
Light Response ◽  
X Ray Diffraction ◽  
Visible Spectroscopy ◽  
Gel Method ◽  
X Ray ◽  
Sol Gel Method ◽  
Visible Light Response ◽  
Ft Ir ◽  
Co Doped

N, Fe co-doped TiO2 photocatalyst was synthesized by sol-gel method. The catalyst prepared was characterized by X-ray diffraction (XRD), Fourier transform infrared (FT-IR), Ultraviolet and visible spectroscopy (UV-vis). The results showed that the N, Fe co-doped TiO2 prepared had the anatase structure. The absorption edge of the photocatalyst shifted to longer wavelength and photocatalytic activity for degradation of Methylene blue (MB) under Xe-lamp (350 W) was much more active than un-doped TiO2, N-TiO2 Fe-TiO2 and P-25.

scholarly journals Structural and magnetic studies on Co-Zn nanoferrite synthesized via sol-gel and combustion methods

2019 ◽  
Vol 37 (1) ◽  
pp. 39-54 ◽  
Author(s):  
B.B.V.S. Vara Prasad ◽  
K.V. Ramesh ◽  
A. Srinivas
Keyword(s):  
Citric Acid ◽  
Chelating Agents ◽  
Sol Gel ◽  
X Ray Diffraction ◽  
Gel Method ◽  
X Ray ◽  
Sol Gel Method ◽  
Three Samples ◽  
Crystallite Sizes ◽  
Ft Ir

AbstractCo–Zn nanocrystalline ferrites with chemical composition Co0:5Zn0:5Fe2O4 were synthesized by sol-gel and combustion methods. The sol-gel method was carried out in two ways, i.e. based on chelating agents PVA and PEG of high and low molecular weights. In auto-combustion method, the ratio of citric acid to metal nitrate was taken as 1:1, while in sol-gel method the chelating agents were taken based on oxygen balance. All the three samples were studied by thermogravimetric and differential thermal analysis for the identification of phase formation and ferritization temperature. The synthesized samples were characterized by powder X-ray diffraction and FT-IR spectroscopy without any thermal treatment. The measured lattice constants and observed characteristic IR absorption bands of the three samples are in good agreement with the reported values showing the formation of a cubic spinel structure. The crystallite sizes of all samples were determined using high intensity peaks and W-H plot. Size-Strain Plot method was also implemented since two of the samples showed low crystallite sizes. The least crystallite size (5.5 nm) was observed for the sample CZVP while the highest (23.8 nm) was observed for the sample CZCA. Cation distribution was proposed based on calculated and observed intensity ratios of selected planes from X ray diffraction data. All structural parameters were presented using experimental lattice constant and oxygen positional parameter, and they correlated with FT-IR results. Magnetic measurements were carried out using vibrating sample magnetometer at room temperature to obtain the characteristic parameters such as saturation magnetization, coercivity, remanence, squareness ratio and Bohr magnetons. Among all, the sample synthesized via citric acid autocombustion method displayed a remarkably higher magnetization of 53 emu/g and the remaining two samples displayed low magnetization values owing to their smaller crystallite sizes.

scholarly journals Synthesis, characterization and in vitro cytotoxicity study of Co and Ni ferrite nanoparticles prepared by sol-gel method

2021 ◽  
Vol 3 (7) ◽  
Author(s):  
Alexandre Pancotti ◽  
Dener Pereira Santos ◽  
Dielly Oliveira Morais ◽  
Mauro Vinícius de Barros Souza ◽  
Débora R. Lima ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Sol Gel ◽  
Test Sample ◽  
In Vitro Cytotoxicity ◽  
Gel Method ◽  
X Ray ◽  
Sol Gel Method ◽  
Transmission Electron ◽  
Crystallite Sizes

AbstractIn this study, we report the synthesis and characterization of NiFe2O4 and CoFe2O4 nanoparticles (NPs) which are widely used in the biomedical area. There is still limited knowledge how the properties of these materials are influenced by different chemical routes. In this work, we investigated the effect of heat treatment over cytotoxicity of cobalt and niquel ferrites NPs synthesized by sol-gel method. Then the samples were studied using transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), vibrating sample magnetometer (VSM), Fourier Transform Infrared Spectroscopy Analysis (FTIR), and X-ray fluorescence (XRF). The average crystallite sizes of the particles were found to be in the range of 20–35 nm. The hemocompatibility (erythrocytes and leukocytes) was checked. Cytotoxicity results were similar to those of the control test sample, therefore suggesting hemocompatibility of the tested materials.

Annealing Effects on the Physical and Magnetic Properties of Tb1.5Y1.5Fe5O12 Films Nanoparticles Prepared by Sol-Gel Method

2013 ◽  
Vol 756 ◽  
pp. 91-98 ◽  
Author(s):  
Ftema W. Aldbea ◽  
Noor Bahyah Ibrahim ◽  
Mustafa Hj. Abdullah
Keyword(s):  
Particle Size ◽  
Magnetic Properties ◽  
Annealing Temperature ◽  
Quartz Substrate ◽  
Sol Gel ◽  
Lattice Parameter ◽  
Gel Method ◽  
X Ray ◽  
Sol Gel Method ◽  
Iron Garnet

Terbium –substituted yttrium iron garnet (Tb1.5Y1.5Fe5O12) films nanoparticles were successfully prepared by a sol-gel method. The films were deposited on the quartz substrate using spin coating technique. To study effect of annealing temperature, the annealing process was executed at 700, 800 and 900 °C in air for 2 hours. The X-ray diffraction (XRD) proved that the pure phase of garnet structure was detected for the film annealed at 900 °C. The lattice parameter increased with the increment of annealing temperature and the highest value of 12.35 Å was obtained at 900 °C. Field Emission Scanning Electron Microscope (FE-SEM) results showed that the particle size increased from 43nm to 56nm as annealing temperature increased from 700 to 900°C. The film’s thickness also affected by increasing of annealing temperature and become thin at 900 °C due to densification process occurred at high annealing temperature. The elemental compositions of the Tb1.5Y1.5Fe5O12 film were detected using an Energy Dispersive X-raySpectroscopy (EDX). Magnetic properties at room temperature were measured using a Vibrating Sample Magnetometer (VSM).The saturation magnetization Ms increased with the annealingtemperature and showed a high value of 104emu/cm3, but the coercivity Hc of the film was decreased due to the increment of the particle size. Normal 0 21 false false false MS X-NONE X-NONE MicrosoftInternetExplorer4 Terbium –substituted yttrium iron garnet (Tb1.5Y1.5Fe5O12) films nanoparticles were successfully prepared by a sol-gel method. The films were deposited on the quartz substrate using spin coating technique. To study effect of annealing temperature, the annealing process was executed at 700, 800 and 900°C in air for 2 hours. The X-ray diffraction (XRD) proved that the pure phase of garnet structure was detected for the film annealed at 900 °C. The lattice parameter increased with the increment of annealing temperature and the highest value of 12.35 Å was obtained at 900 °C. Field Emission Scanning Electron Microscope (FE-SEM) results showed that the particle size increased from 43nm to 56nm as annealing temperature increased from 700 to 900 °C. The film’s thickness also affected by increasing of annealing temperature and become thin at 900 °C due to densification process occurred at high annealing temperature. The elemental compositions of the Tb1.5Y1.5Fe5O12 film were detected using an Energy Dispersive X-ray Spectroscopy (EDX). Magnetic properties at room temperature were measured using a Vibrating Sample Magnetometer (VSM).The saturation magnetization Ms increased with the annealing temperature and showed a high value of 104emu/cm3, but the coercivity Hc of the film was decreased due to the increment of the particle size. st1\:*{behavior:url(#ieooui) } /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;}

Impedance Spectroscopy Study of LiTaO3 Powder Synthesized via Sol-Gel Method

2012 ◽  
Vol 545 ◽  
pp. 275-278 ◽  
Author(s):  
Lili Widarti Zainuddin ◽  
Norlida Kamarulzaman
Keyword(s):  
Room Temperature ◽  
Single Phase ◽  
Sol Gel ◽  
Rhombohedral Structure ◽  
Spectroscopy Study ◽  
X Ray Diffraction ◽  
Gel Method ◽  
X Ray ◽  
Sol Gel Method ◽  
Impedance Spectroscopy Study

A ceramics sample of LiTaO3 was prepared using a sol-gel method. The sample is annealed at 750 °C for 48 hours. X-ray diffraction analysis indicate the formation of single phase, rhombohedral structure. An ac impedance study was used to analyse the conductivity of LiTaO3 at room temperature and at various temperatures.

Magnetic Properties of Bulk Zn0.95-XMnXFe0.05O2 Prepared by Sol-Gel Method and Subsequent Hot Pressing

2011 ◽  
Vol 268-270 ◽  
pp. 356-359 ◽  
Author(s):  
Wen Song Lin ◽  
C. H. Wen ◽  
Liang He
Keyword(s):  
Magnetic Properties ◽  
Photoelectron Spectroscopy ◽  
Raw Materials ◽  
Sol Gel ◽  
Secondary Phase ◽  
X Ray Diffraction ◽  
Gel Method ◽  
X Ray ◽  
Sol Gel Method ◽  
Doped Zno

Mn, Fe doped ZnO powders (Zn0.95-xMnxFe0.05O2, x≤0.05) were synthesized by an ameliorated sol-gel method, using Zn(CH3COO)2, Mn(CH3COO)2and FeCl2as the raw materials, with the addition of vitamin C as a kind of chemical reducer. The resulting powder was subsequently compacted under pressure of 10 MPa at the temperature of 873K in vacuum. The crystal structure and magnetic properties of Zn0.95-xMnxFe0.05O2powder and bulk samples have been investigated by X-ray diffraction (XRD) and vibrating sample magnetometer (VSM). X-ray photoelectron spectroscopy (XPS) was used to study chemical valence of manganese, iron and zinc in the samples. The x-ray diffraction (XRD) results showed that Zn0.95-xMnxFe0.05O (x≤0.05) samples were single phase with the ZnO-like wurtzite structure. No secondary phase was found in the XRD spectrum. X-ray photoelectron spectroscopy (XPS) showed that Fe and Mn existed in Zn0.95-xMnxFe0.05O2samples in Fe2+and Mn2+states. The results of VSM experiment proved the room temperature ferromagnetic properties (RTFP) of Mn, Fe co-doped ZnO samples.

X-ray absorption and XPS study of titanium mixed oxides synthesized by the sol–gel method

2001 ◽  
Vol 114-116 ◽  
pp. 307-311 ◽  
Author(s):  
José E. Gonçalves ◽  
Sandra C. Castro ◽  
Aline Y. Ramos ◽  
Maria C.M. Alves ◽  
Yoshitaka Gushikem
Keyword(s):  
Mixed Oxides ◽  
Sol Gel ◽  
Gel Method ◽  
X Ray ◽  
Sol Gel Method ◽  
Xps Study ◽  
X Ray Absorption
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