Sol−Gel Synthesis and Catalytic Properties of Sulfated Zirconia Catalysts

1996 ◽  
Vol 35 (9) ◽  
pp. 3141-3148 ◽  
Author(s):  
Binghui Li ◽  
Richard D. Gonzalez
Keyword(s):  
Sulfated Zirconia ◽  
Catalytic Properties ◽  
Sol Gel ◽  
Sol Gel Synthesis ◽  
Sulfated Zirconia Catalysts

One-step sol-gel synthesis of sulfated-zirconia catalysts

1996 ◽  
Vol 38 (1-2) ◽  
pp. 109-113 ◽  
Author(s):  
D. Tichit ◽  
B. Coq ◽  
H. Armendariz ◽  
F. Figu�ras
Keyword(s):  
Sulfated Zirconia ◽  
Sol Gel ◽  
One Step ◽  
Sol Gel Synthesis ◽  
Sulfated Zirconia Catalysts

Citrate-mediated sol–gel synthesis of Al-substituted sulfated zirconia catalysts for α-pinene isomerization

2018 ◽  
Vol 458 ◽  
pp. 206-212 ◽  
Author(s):  
Abdallah I.M. Rabee ◽  
Lee J. Durndell ◽  
Nasr E. Fouad ◽  
Lucia Frattini ◽  
Mark A. Isaacs ◽  
...  
Keyword(s):  
Sulfated Zirconia ◽  
Sol Gel ◽  
Sol Gel Synthesis ◽  
Sulfated Zirconia Catalysts

One-pot sol-gel synthesis of sulfated ZrO2-SiO2 catalysts for alcohol dehydration

2001 ◽  
Vol 79 (8) ◽  
pp. 1220-1223 ◽  
Author(s):  
Quan Zhuang ◽  
Jack M Miller
Keyword(s):  
Ammonium Sulfate ◽  
Sulfated Zirconia ◽  
Sol Gel ◽  
Synthesis Method ◽  
Acid Catalyst ◽  
Alcohol Dehydration ◽  
One Pot ◽  
Zirconium Propoxide ◽  
The One ◽  
Sol Gel Synthesis

Sulfated ZrO2–SiO2 catalysts were synthesized by one-pot sol-gel method using ammonium sulfate, zirconium propoxide, and tetraethyl orthosilicate as precursors. The catalysts were characterized by N2 adsorption and DRIFTS. On calcining the gel at elevated temperature, the ammonium sulfate decomposed, giving a sulfated zirconia–silica catalyst. By adding ammonium sulfate to the sol-gel synthesis system, the surface area, pore size, and pore volume of the resultant catalyst were increased. The one-pot sol-gel synthesized catalyst with an optimum loading of SO42– 14 mol% showed significantly higher catalytic activity, with a selectivity of 100%, for isopropanol dehydration when compared to the impregnated catalyst. The one-pot sol-gel synthesis method is an effective way to prepare sulfated zirconia catalyst.Key words: sulfated zirconia, sol-gel synthesis, acid catalyst, alcohol dehydration, N2 adsorption, DRIFT.

Non-aqueous sol–gel synthesis, characterization and catalytic properties of metal fluoride supported palladium nanoparticles

2008 ◽  
Vol 78 (1-2) ◽  
pp. 80-91 ◽  
Author(s):  
Pratap T. Patil ◽  
Anton Dimitrov ◽  
Holm Kirmse ◽  
Wolfgang Neumann ◽  
Erhard Kemnitz
Keyword(s):  
Palladium Nanoparticles ◽  
Catalytic Properties ◽  
Sol Gel ◽  
Metal Fluoride ◽  
Supported Palladium ◽  
Sol Gel Synthesis

scholarly journals SOL-GEL SYNTHESIS AND CATALYTIC PROPERTIES OF VANADIUM PHOSPHATES BULK MATERIALS

2000 ◽  
Vol 11 (0) ◽  
pp. 87-93 ◽  
Author(s):  
S. A. Ennaciri ◽  
K. Malka ◽  
C. Louis ◽  
P. Barboux ◽  
C. R'kha ◽  
...  
Keyword(s):  
Catalytic Properties ◽  
Sol Gel ◽  
Bulk Materials ◽  
Vanadium Phosphates ◽  
Sol Gel Synthesis

scholarly journals Sol-gel synthesis and structure of La2O3-CoO-SiO2 powders

2008 ◽  
Vol 2 (2) ◽  
pp. 103-108 ◽  
Author(s):  
Lachezar Radev ◽  
Liliana Pavlova ◽  
Bisserka Samuneva ◽  
Elena Kashchieva ◽  
Irena Mihailova ◽  
...  
Keyword(s):  
Chelating Agents ◽  
Catalytic Properties ◽  
Sol Gel ◽  
Treatment Temperature ◽  
Solution Crystallization ◽  
Metal Nitrates ◽  
Crystallite Sizes ◽  
Solgel Method ◽  
Sol Gel Synthesis ◽  
Reaction In Solution

LaCoO3 powders are studied because they exhibit interesting electrical, magnetic and catalytic properties. In this paper, new synthesized La2O3-CoO-SiO2 powders with different quantity of silica were prepared via solgel method in aqua media, starting from metal nitrates with different chelating agents. The relation between the reaction in solution, crystallization pathway and morphology were discussed. In LaCoO3-SiO2 powders, depending on the content of SiO2 and the treatment temperature (700-1100?C), different crystalline phases (LaCoO3, Co2 SiO4 and La9.31 (SiO4 )6 O2) were observed with the crystallite sizes ranging from 50 to 100 nm. It was proved that chemical composition and nature of used additives has influence on the phase formation and structure of obtained nanomaterials.

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