Effects of Sol−Gel Synthesis on 5Fe−15Mn−40Zn−40Ti−O Mixed Oxide Structure and its H2S Removal Efficiency from Industrial Gas Streams

2009 ◽  
Vol 43 (12) ◽  
pp. 4367-4372 ◽  
Author(s):  
Kyriaki Polychronopoulou ◽  
Angelos M. Efstathiou
Keyword(s):  
Removal Efficiency ◽  
Mixed Oxide ◽  
Sol Gel ◽  
Oxide Structure ◽  
H2s Removal ◽  
Gas Streams ◽  
Sol Gel Synthesis

Sol–gel synthesis and structural characterization of niobium-silicon mixed-oxide nanocomposites

2007 ◽  
Vol 43 (2) ◽  
pp. 193-204 ◽  
Author(s):  
Antonio Aronne ◽  
Elisa Marenna ◽  
Valeria Califano ◽  
Esther Fanelli ◽  
Pasquale Pernice ◽  
...  
Keyword(s):  
Structural Characterization ◽  
Mixed Oxide ◽  
Sol Gel ◽  
Sol Gel Synthesis

scholarly journals A versatile sol–gel synthesis route to metal–silicon mixed oxide nanocomposites that contain metal oxides as the major phase

2004 ◽  
Vol 350 ◽  
pp. 173-181 ◽  
Author(s):  
Brady J. Clapsaddle ◽  
David W. Sprehn ◽  
Alexander E. Gash ◽  
Joe H. Satcher Jr. ◽  
Randall L. Simpson
Keyword(s):  
Metal Oxides ◽  
Mixed Oxide ◽  
Sol Gel ◽  
Major Phase ◽  
Synthesis Route ◽  
Sol Gel Synthesis

Sol-gel Synthesis of Porous Crystalline TiO2–P2O5 Oxide with Thermal Stability

2003 ◽  
Vol 18 (12) ◽  
pp. 2743-2746 ◽  
Author(s):  
Donglin Li ◽  
Haoshen Zhou ◽  
Mitsuhiro Hibino ◽  
Itaru Honma
Keyword(s):  
Heat Treatment ◽  
Thermal Stability ◽  
Solid State ◽  
Block Copolymer ◽  
Specific Surface ◽  
Mixed Oxide ◽  
Glass Phase ◽  
Sol Gel ◽  
Anatase Structure ◽  
Sol Gel Synthesis

Porous TiO2–P2O5 oxide was synthesized by the sol-gel method in the presence of tri-block copolymer (EO)20(PO)70(EO)20 (Pluronic123) in queous solution. The TiO2 nanocrystals with anatase structure precipitated in the as-synthesized TiO2–P2O5 materials at 80°C, considerably lower than that for traditional heat treatment in the solid state, which maintained a stable size of 3.6–4 nm upon calcinations below 500°C. It is believed that P2O5 glass phase prevents the coarsening of TiO2 nanocrystals below 500°C. The mixed oxide exhibited a specific surface area of 170–200 m2/g after calcining in the temperature range of 300–500°C.

scholarly journals Sol-Gel Synthesis of Ceria-Zirconia-Based High-Entropy Oxides as High-Promotion Catalysts for the Synthesis of 1,2-Diketones from Aldehyde

Molecules ◽  
2021 ◽  
Vol 26 (20) ◽  
pp. 6115
Author(s):  
Dalibor Tatar ◽  
Jelena Kojčinović ◽  
Berislav Marković ◽  
Aleksandar Széchenyi ◽  
Aleksandar Miletić ◽  
...  
Keyword(s):  
Sol Gel ◽  
Direct Conversion ◽  
Lewis Acidity ◽  
Reaction Conditions ◽  
Oxide Structure ◽  
High Entropy ◽  
Heterogeneous Catalytic ◽  
Structure Framework ◽  
Acid Catalyzed ◽  
Sol Gel Synthesis

Efficient Lewis-acid-catalyzed direct conversion of aldehydes to 1,2-diketones in the liquid phase was enabled by using newly designed and developed ceria–zirconia-based high-entropy oxides (HEOs) as the actual catalysts. The synergistic effect of various cations incorporated in the same oxide structure (framework) was partially responsible for the efficiency of multicationic materials compared to the corresponding single-cation oxide forms. Furthermore, a clear, linear relationship between the Lewis acidity and the catalytic activity of the HEOs was observed. Due to the developed strategy, exclusively diketone-selective, recyclable, versatile heterogeneous catalytic transformation of aldehydes can be realized under mild reaction conditions.

Sol-gel synthesis, characterization and photocatalytic activity of mixed oxide ZnO-Fe2O3

2007 ◽  
Vol 42 (1) ◽  
pp. 71-78 ◽  
Author(s):  
Aracely Hernández ◽  
Lourdes Maya ◽  
Enrique Sánchez-Mora ◽  
Eduardo M. Sánchez
Keyword(s):  
Photocatalytic Activity ◽  
Mixed Oxide ◽  
Sol Gel ◽  
Sol Gel Synthesis

Inorganic-organic Hybrid Materials for Real 3-D Sub-νm Lithography

2003 ◽  
Vol 780 ◽  
Author(s):  
R. Houbertz ◽  
J. Schulz ◽  
L. Fröhlich ◽  
G. Domann ◽  
M. Popall ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Sol Gel ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Hybrid Polymer ◽  
Organic Hybrid ◽  
Two Photon ◽  
Applied Technology ◽  
Scale Structures ◽  
Sol Gel Synthesis

AbstractReal 3-D sub-νm lithography was performed with two-photon polymerization (2PP) using inorganic-organic hybrid polymer (ORMOCER®) resins. The hybrid polymers were synthesized by hydrolysis/polycondensation reactions (modified sol-gel synthesis) which allows one to tailor their material properties towards the respective applications, i.e., dielectrics, optics or passivation. Due to their photosensitive organic functionalities, ORMOCER®s can be patterned by conventional photo-lithography as well as by femtosecond laser pulses at 780 nm. This results in polymerized (solid) structures where the non-polymerized parts can be removed by conventional developers.ORMOCER® structures as small as 200 nm or even below were generated by 2PP of the resins using femtosecond laser pulses. It is demonstrated that ORMOCER®s have the potential to be used in components or devices built up by nm-scale structures such as, e.g., photonic crystals. Aspects of the materials in conjunction to the applied technology are discussed.

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