scholarly journals Evaluation of La1−xSrxMnO3 (0 ≤ x < 0.4) synthesised via a modified sol–gel method as mediators for magnetic fluid hyperthermia

CrystEngComm ◽  
2016 ◽  
Vol 18 (3) ◽  
pp. 407-416 ◽  
Author(s):  
K. McBride ◽  
J. Cook ◽  
S. Gray ◽  
S. Felton ◽  
L. Stella ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Magnetic Fluid ◽  
Sol Gel ◽  
Magnetic Fluid Hyperthermia ◽  
Gel Method ◽  
Sol Gel Method ◽  
Lanthanum Strontium ◽  
Sol Gel Synthesis

A range of lanthanum strontium manganates (La1−xSrxMnO3) where 0 ≤ x ≤ 0.4 were prepared using a modified peroxide sol–gel synthesis. The crystal structure of these materials was investigated and their potential as mediators for magnetic fluid hyperthermia was evaluated.

Synthesis, crystal structure and photoluminescence properties of Eu2+-activated RbCaGd(PO4)2 phosphors

RSC Advances ◽  
2016 ◽  
Vol 6 (14) ◽  
pp. 11211-11217 ◽  
Author(s):  
Xue Chen ◽  
Qidi Wang ◽  
Fengzhu Lv ◽  
Paul K. Chu ◽  
Yihe Zhang
Keyword(s):  
Crystal Structure ◽  
Sol Gel ◽  
Dipole Interaction ◽  
Concentration Quenching ◽  
Photoluminescence Properties ◽  
Gel Method ◽  
Sol Gel Method ◽  
First Time

RbCaGd(PO4)2:Eu2+ was prepared by the Pechini-type sol–gel method. The crystal structure was determined in the first time. The dipole–dipole interaction plays a major role in the mechanism of concentration quenching of Eu2+ in this phosphor.

scholarly journals Nanosized TiO2Photocatalyst Powder via Sol-Gel Method: Effect of Hydrolysis Degree on Powder Properties

2009 ◽  
Vol 2009 ◽  
pp. 1-8 ◽  
Author(s):  
Nor Hafizah ◽  
Iis Sopyan
Keyword(s):  
Crystal Structure ◽  
Surface Area ◽  
Sol Gel ◽  
Xrd Analysis ◽  
Gel Method ◽  
Sol Gel Method ◽  
Hydrolysis Degree ◽  
Method Effect ◽  
Powder Properties ◽  
Dta Curves

NanosizedTiO2powder was synthesized via sol-gel method using titanium tetraisopoxide (TPT) as the precursor. Mol ratios of water to TPT were varied from 1 (Powder A), 2 (Powder B), 3 (Powder C), and 4 (Powder D) to evaluate effect of hydrolysis degree. TG/DTA curves showed that amorphous phase turned to anatase crystal structure at ca. 415, 337, 310, and339∘C for Powders A, B, C, and D, respectively. XRD analysis showed that all the synthesizedTiO2powders were 100% in anatase form with Powders B and C showing considerably higher crystallinities. The powders obtained at lower water to TPT mol ratios were spherical in shape and they became bar-like shapes higher mol ratios. The lower hydrolysis degree led to higher surface area of the Powder A (24.8 m2/g) compared to Powder B (14.6 m2/g). From phenol photocatalytic measurement, Powder B was the most efficient attributed to its higher crystallinity.

Iron-Zircon Pigments Prepared by Non-Hydrolytic Sol-Gel Method at Low Temperature

2011 ◽  
Vol 412 ◽  
pp. 223-226 ◽  
Author(s):  
Wei Hui Jiang ◽  
Yan Hui Yang ◽  
Qing Xia Zhu ◽  
Jian Min Liu
Keyword(s):  
Crystal Structure ◽  
Low Temperature ◽  
Ferric Chloride ◽  
Lithium Fluoride ◽  
Sol Gel ◽  
Zircon Crystal ◽  
Molar Ratio ◽  
Gel Method ◽  
Sol Gel Method ◽  
Anhydrous Ferric Chloride

ron-zircon pigment has been synthesized by non-hydrolytic sol-gel method using zirconium chloride and tetraethoxysilane as precursors, anhydrous ferric chloride as colorant, lithium fluoride as mineralizer and anhydrous ethanol as solvent. Iron-zircon pigment has been characterized by means of DTA-TG, XRD, Colorimeter and TEM. The results show that only a small fraction of iron is incorporated in the zircon crystal structure while the remaining iron cations are trapped within the zircon matrix. The iron-zircon with the red value (a*) of 20.64 can be synthesized at 700°C with the optimum Fe/Zr molar ratio of 0.2.

scholarly journals Sol-Gel Synthesis, X-Ray Diffraction Studies, and Electric Conductivity of Sodium Europium Silicate

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Ekaterina V. Borisova ◽  
Alexey V. Ignatov ◽  
Eugeni I. Get'man ◽  
Stanislav N. Loboda ◽  
Lyudmyla I. Ardanova ◽  
...  
Keyword(s):  
Activation Energy ◽  
Electric Conductivity ◽  
Rietveld Refinement ◽  
Sol Gel ◽  
Apatite Structure ◽  
X Ray Diffraction ◽  
Gel Method ◽  
X Ray ◽  
Sol Gel Method ◽  
Sol Gel Synthesis

Sodium europium silicate, NaEu9(SiO4)6O2, with apatite structure has been obtained and studied using X-ray diffraction and SEM. It has been shown that sodium sublimation does not take place upon synthesis by the sol-gel method. Rietveld refinement has revealed that sodium atoms are ordered and occupy the 4f position. O(4) atoms not related to silicate ions are placed at the centers of Eu(2) triangles. DC and AC electric conductivity and activation energy have been determined for the compound studied.

Preferential site occupancy of Ni ions and oxidation state of Fe ions in the YIG crystal structure obtained by sol-gel method

2020 ◽  
Vol 849 ◽  
pp. 156657
Author(s):  
J.P. Caland ◽  
Cynthia P.C. Medrano ◽  
A. Caytuero ◽  
E. Baggio-Saitovitch ◽  
F.J. Litterst ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Oxidation State ◽  
Sol Gel ◽  
Site Occupancy ◽  
Gel Method ◽  
Sol Gel Method ◽  
Preferential Site ◽  
Fe Ions

Preparation of TiO2 Thin Films by Sol-Gel Method and Analysis of its Transmittance Based on Computer Image Processing

2020 ◽  
Vol 842 ◽  
pp. 121-126
Author(s):  
Ji Hui Luo ◽  
Qiu Yue Wen ◽  
Shu Liu ◽  
Ting Liu ◽  
Su Ting Wei ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Sintering Temperature ◽  
Raw Materials ◽  
Sol Gel ◽  
Light Transmittance ◽  
Anatase Structure ◽  
Gel Method ◽  
Sol Gel Method ◽  
Computer Image Processing ◽  
Imagej Software

TiO2 films were prepared by sol-gel method with butyl titanate, anhydrous ethanol, acetyl acetone and hydrochloric acid as raw materials, which were sintered at 380 °C and 530 °C respectively to obtain TiO2 films. XRD was used for analyzing the crystal structure of TiO2 film, and ImageJ software was used to detect the light transmittance of TiO2 film samples. The results show that the film sintered at 530 °C is brookite structure and the film sintered at 380 °C is anatase structure. The increase of sintering temperature is not conducive to the growth of TiO2 film grains. TiO2 films sintered at 380 °C have good light transmittance.

Search the Hard Magnetic Tetrataenite Phase in the Fragments of Chelyabinsk Meteorite

2016 ◽  
Vol 845 ◽  
pp. 265-268
Author(s):  
Sergey Taskaev ◽  
Konstantin Skokov ◽  
Dmitriy Karpenkov ◽  
Elena M. Semenova ◽  
Vladimir V. Khovaylo ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Magnetic Particles ◽  
Sol Gel ◽  
Magnetic Domains ◽  
Gel Method ◽  
Chelyabinsk Meteorite ◽  
Sol Gel Method

Few Fe-Ni particles with composition close 50:50 were found by EDX and SEM investigations in the fragment of Chelyabinsk meteorite. These inclusions were extracted and magnetic domains were observed with the help of sol-gel method. No hard magnetic particles with tetragonal L10 crystal structure (tetrataenite) were detected.

scholarly journals Gas phase dehydration of glycerol to acrolein over WO3-based catalysts prepared by non-hydrolytic sol–gel synthesis

RSC Advances ◽  
2018 ◽  
Vol 8 (24) ◽  
pp. 13344-13352 ◽  
Author(s):  
L. Nadji ◽  
A. Massó ◽  
D. Delgado ◽  
R. Issaadi ◽  
E. Rodriguez-Aguado ◽  
...  
Keyword(s):  
Gas Phase ◽  
Sol Gel ◽  
Gel Method ◽  
Sol Gel Method ◽  
Glycerol Dehydration ◽  
Sol Gel Synthesis

Active and selective W–Si–(Zr)–O catalysts for glycerol dehydration to acrolein have been successfully prepared by non-hydrolytic sol gel method.

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