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.

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.

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.

Catalytic oxidation of gas-phase mercury over Co/TiO2 catalysts prepared by sol–gel method

2011 ◽  
Vol 12 (14) ◽  
pp. 1291-1294 ◽  
Author(s):  
Yue Liu ◽  
Yuejun Wang ◽  
Haiqiang Wang ◽  
Zhongbiao Wu
Keyword(s):  
Catalytic Oxidation ◽  
Gas Phase ◽  
Sol Gel ◽  
Gel Method ◽  
Sol Gel Method

scholarly journals Sol–gel synthesis and room-temperature properties of α-LiZr2(PO4)3

RSC Advances ◽  
2015 ◽  
Vol 5 (22) ◽  
pp. 17054-17059 ◽  
Author(s):  
Hany El-Shinawi ◽  
Colin Greaves ◽  
Jürgen Janek
Keyword(s):  
Room Temperature ◽  
Sol Gel ◽  
Bulk Conductivity ◽  
Gel Method ◽  
Sol Gel Method ◽  
Sol Gel Synthesis

A room-temperature stable α-LiZr2(PO4)3 phase is prepared by a modified sol–gel method, and shows bulk conductivity as high as 1.58 × 10−4 Scm−1.

The effects of surfactant in the sol–gel synthesis of CuO/TiO2 nanocomposites on its photocatalytic activities under UV-visible and visible light illuminations

2020 ◽  
Vol 44 (5) ◽  
pp. 1888-1904 ◽  
Author(s):  
T. N. Ravishankar ◽  
M. de O. Vaz ◽  
S. R. Teixeira
Keyword(s):  
Visible Light ◽  
Room Temperature ◽  
Low Cost ◽  
Sol Gel ◽  
Gel Method ◽  
Sol Gel Method ◽  
Photocatalytic Activities ◽  
Uv Visible ◽  
Sol Gel Synthesis ◽  
Surfactant Assisted

Effective and low-cost CuO/TiO2 nanocomposites were prepared at room temperature by a surfactant-assisted sol–gel method for photocatalytic activities under UV-visible and visible light irradiations.

Photocatalytic Activity of TiO2 Synthesised by the Sol-Gel Method

2003 ◽  
Vol 2003 (7) ◽  
pp. 423-425 ◽  
Author(s):  
Suzuko Yamazaki ◽  
Tomoko Hayashi
Keyword(s):  
Photocatalytic Activity ◽  
Sol Gel ◽  
Gel Method ◽  
Sol Gel Method ◽  
Degradation Rates ◽  
Sol Gel Synthesis

The effects of alkoxides, solvents, and the peptization and dialysis procedures in the sol-gel synthesis of TiO2 on the degradation rates of ethylene were investigated.

Oxidation of NO in gas phase by Au–TiO2 photocatalysts prepared by the sol–gel method

2009 ◽  
Vol 148 (1-2) ◽  
pp. 115-118 ◽  
Author(s):  
J. Hernández-Fernández ◽  
A. Aguilar-Elguezabal ◽  
S. Castillo ◽  
B. Ceron-Ceron ◽  
R.D. Arizabalo ◽  
...  
Keyword(s):  
Gas Phase ◽  
Sol Gel ◽  
Tio2 Photocatalysts ◽  
Gel Method ◽  
Sol Gel Method ◽  
Oxidation Of No

SOL-GEL SYNTHESIS AND CHARACTERIZATION OF COPPER STABILIZED ZIRCONIA NANOPARTICLES

2011 ◽  
Vol 25 (21) ◽  
pp. 2823-2839 ◽  
Author(s):  
Y. VAHIDSHAD ◽  
H. ABDIZADEH ◽  
H. R. BAHARVANDI ◽  
M. AKBARI BASERI
Keyword(s):  
Particle Size ◽  
Hydrogen Production ◽  
Calcination Temperature ◽  
Aging Temperature ◽  
Sol Gel ◽  
Chelating Agent ◽  
Molar Ratio ◽  
Gel Method ◽  
Sol Gel Method ◽  
Sol Gel Synthesis

A sol-gel method is investigated to synthesize CuO – ZrO 2 nanoparticles as catalyst for hydrogen production from methanol. Finer precursor nanoparticles give rise to larger specific areas in catalyst which result in a high hydrogen production. The effects of some critical process parameters on the sol-gel synthesis of CuO – ZrO 2 nanoparticles are studied. These parameters are affected on synthesis of CuO – ZrO 2 when it is prepared with sol-gel method. Particle size and distribution are considered as the results. The parameters including the effect of calcination temperature, aging temperature, nature and concentration of catalyst (acidic or basic conditions), H 2 O /precursor molar ratio, and chelating agent that have been identified as most important, are focused. It is found that the calcination temperature strongly influenced the morphology and interaction between the active species and support, and hence the structure and catalytic performance. Nature and concentration of catalyst ( pH value), chelating agent, ( H 2 O /precursor) molar ratio and also aging temperature have influence on the nanoparticles. Thus, by controlling these factors, it is possible to vary the morphology and properties of the sol-gel-derived inorganic network over wide ranges. Morphology, particle size and distribution, phase evaluation, structure, and chemical analysis of the products are investigated by SEM, TEM, DTA/TG, XRD and EDX respectively.

Sol-gel synthesis and anomalies on magnetic and electric properties of (Ba1−xLax)3Cu3(O, F)yfilms

1998 ◽  
Vol 13 (11) ◽  
pp. 3022-3026
Author(s):  
Y. Masuda ◽  
J-S. Jin ◽  
K. Nakanishi ◽  
K. Tanabe
Keyword(s):  
Layered Structure ◽  
Electrical Resistance ◽  
Sol Gel ◽  
Electric Properties ◽  
Type Structure ◽  
Gel Method ◽  
Sol Gel Method ◽  
Drastic Decrease ◽  
Magnetic And Electric Properties ◽  
Sol Gel Synthesis

(Ba1−xLax)3Cu3(O, F)y films were prepared using a sol-gel method. Phases, the c lattice parameters of which are about 13.8, 13.1, and 11.6 Å, respectively, were formed in the films. The compound with the c parameter of ˜13.8 Å is considered to be a Ba2−xLaxCuO2F2+δ which has the La2CuO4-type structure inserted with fluorine. The compound with the c parameter of ˜11.6 Å is thought to have a three-layered structure of the perovskite block which is arisen by ordering between La and Ba elements. The films containing these compounds showed some interesting anomalies in SQUID measurements. However, no film showed a drastic decrease of electrical resistance.

Sol-gel Synthesis of La2Ti2O7 Modified with PEG4000 for the Enhanced Photocatalytic Activity

2016 ◽  
Vol 19 (2) ◽  
Author(s):  
Hong Wang ◽  
Ling Du ◽  
Lili Yang ◽  
Wenjie Zhang ◽  
Hongbo He
Keyword(s):  
Photocatalytic Activity ◽  
Sol Gel ◽  
Gel Method ◽  
Sol Gel Method ◽  
Sol Gel Synthesis

AbstractA sol-gel method was used to synthesis La

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