X-ray peak broadening and optical properties analysis of SnO2 nanosheets prepared by sol-gel method

The Structural, Magnetic and Optical Properties of Ni-Mg-Zn Ferrite Prepared With Different Complexing Agents via Sol-Gel Method

10.21203/rs.3.rs-263070/v1 ◽

2021 ◽

Author(s):

Yanchun Zhang ◽

Aimin Sun ◽

Zhaxi Suonan

Keyword(s):

Optical Properties ◽

Electron Microscope ◽

Sol Gel ◽

Complexing Agents ◽

Complexing Agent ◽

Gel Method ◽

X Ray ◽

Sol Gel Method ◽

Zn Ferrite ◽

Vis Spectroscopy

Abstract Different complexing agents were used to prepare Ni-Mg-Zn ferrite with the composition formula Ni0.2Mg0.2Zn0.6Fe2O4 via sol-gel method, which included citric acid, oxalic acid, egg white and EDTA. The Ni0.2Mg0.2Zn0.6Fe2O4 ferrite with no complexing agent was also prepared as a comparison. The chemical phases of samples were analyzed by the X-ray diffraction (XRD), which indicated that samples had spinel phase structure. The lattice constants of samples are in the range of 8.3980 ~ 8.4089 Å. The composition and structure were further studied by fourier transform infrared spectroscopy (FTIR). There were two typical characteristic bands related to the stretching vibrations of spinel ferrite in FTIR spectra. Scanning electron microscope (SEM) micrographs and transmission electron microscope (TEM) images showed that the particles have the shape of spherical cube. Energy dispersive spectrometer (EDS) analyzed the elements and ingredients of samples, which included Ni, Mg, Zn, Fe and O. X-ray photoelectron spectroscopy (XPS) is used to examine further the elemental composition and chemical state of sample prepared with EDTA as complexing agent. The optical properties of samples were investigated by photoluminescence spectra and UV-Vis spectroscopy. Vibrating sample magnetometer (VSM) was used to characterize magnetic properties, hysteresis loops revealed the ferrimagnetism behavior of prepared samples.

Download Full-text

ZnO QDs Deposited on Si by Sol-Gel Method: Role of Annealing Temperature on Structural and Optical Properties

Modern Applied Science ◽

10.5539/mas.v10n4p12 ◽

2016 ◽

Vol 10 (4) ◽

pp. 12 ◽

Cited By ~ 3

Author(s):

A. Mohammed Al-Azawi ◽

Hayder J. Al-Asedy ◽

Noriah Bidin ◽

Khaldoon N. Abbs.

Keyword(s):

Optical Properties ◽

Annealing Temperature ◽

Ostwald Ripening ◽

Sol Gel ◽

Structural And Optical Properties ◽

Wurtzite Phase ◽

Gel Method ◽

X Ray ◽

Sol Gel Method ◽

Zno Qds

Zinc acetate, propanol, and ethanolamine are used to synthesize ZnO quantum dots (QDs) via the sol–gel method. Spin coating at 220°C is then employed to prepare ZnO thin films consist of QDs. The effects of thermal annealing temperature on the structural and optical properties of the samples are investigated. The prepared QDs are characterized using X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), and photoluminescence spectroscopy (PL). XRD patterns reveal the crystalline nature of samples existing in the hexagonal wurtzite phase. Increasing annealing temperatures bring about changes to the crystal orientation through the c-axis and increase the size of the QDs from ~10 nm to ~22 nm; this increment can be explained by a coarsening mechanism and the Ostwald ripening process. The observed broadening of X-ray peaks confirms the evolution of crystalline phases in the ZnO QDs. Quantitative analysis of size-dependent strain effects is performed through the Williamson-Hall model. The QD mean size estimated from FESEM and XRD displays high consistency. Room-temperature PL peaks of 3.37ev are attributed to the radiative recombination of electrons and holes from the ZnO QDs/Si interface.

Download Full-text

Optical Properties of CuAlO2 Synthesized by Sol-Gel Method

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.496-500.362 ◽

2014 ◽

Vol 496-500 ◽

pp. 362-365 ◽

Cited By ~ 2

Author(s):

Qing Xiang Lin ◽

Feng Miao ◽

Yi Huang

Keyword(s):

Optical Properties ◽

Raw Materials ◽

Sol Gel ◽

X Ray Diffraction ◽

Visible Spectroscopy ◽

Gel Method ◽

X Ray ◽

Sol Gel Method ◽

Uv Visible ◽

P Type

CuAlO2microcrystallites were synthesized by Sol-gel method at 1200°C with Cu (CH3COO)2·H2O, Al (NO3)3·9H2O and ethylene glycol as raw materials. The phase composition,morphology,and optical properties of CuAlO2microcrystallites were chatacterized by X-ray diffraction, Scanning electron microscope,Photoluminescence and UV-visible spectroscopy respectively. The results of XRD show that CuAlO2with delafossite crystal structure is obtained. The defect emission were observed through PL spectrum test. It can be concluded that Cu-vacancy may be the possible reason of the observed activated p-type conductivity of CuAlO2. Can be found three characterized peak (λ1=290nm, λ2=410nm, λ3=430 nm) on the spectra.

Download Full-text

Characterization and X-ray peak broadening analysis in PZT nanoparticles prepared by modified sol–gel method

Ceramics International ◽

10.1016/j.ceramint.2010.03.022 ◽

2010 ◽

Vol 36 (6) ◽

pp. 1905-1910 ◽

Cited By ~ 33

Author(s):

A. Khorsand Zak ◽

W.H. Abd. Majid

Keyword(s):

Sol Gel ◽

Gel Method ◽

X Ray ◽

Sol Gel Method ◽

Peak Broadening

Download Full-text

Optical Properties of vanadium pentoxide prepared by sol gel method

Journal of Kufa Physics ◽

10.31257/2018/jkp/100101 ◽

2018 ◽

Vol 10 (1) ◽

pp. 1-7 ◽

Cited By ~ 1

Author(s):

Hashim M. Jabbar ◽

Keyword(s):

Optical Properties ◽

Vanadium Pentoxide ◽

Sol Gel ◽

Gel Method ◽

Sol Gel Method

Download Full-text

Electronic structure and optical properties of spinel structure Zn1-xNixAl2O4 nanopowders synthesized by sol-gel method

Chemical Physics Letters ◽

10.1016/j.cplett.2021.138582 ◽

2021 ◽

pp. 138582

Author(s):

Qiang Lu ◽

Zhiqiang Wei ◽

Xiaojuan Wu ◽

Shangpan Huang ◽

Meijie Ding ◽

...

Keyword(s):

Optical Properties ◽

Electronic Structure ◽

Spinel Structure ◽

Sol Gel ◽

Gel Method ◽

Sol Gel Method

Download Full-text

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

SN Applied Sciences ◽

10.1007/s42452-021-04709-y ◽

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.

Download Full-text