Nanocasted Synthesis of Mesoporous Metal Oxides and Mixed Oxides from Mesoporous Cubic (Ia3d) Vinylsilica

2008 ◽  
Vol 8 (11) ◽  
pp. 5652-5658 ◽  
Author(s):  
Yangang Wang ◽  
Yanqin Wang ◽  
Xiaohui Liu ◽  
Yun Guo ◽  
Yanglong Guo ◽  
...  
Keyword(s):  
Metal Oxides ◽  
Mixed Oxides ◽  
Catalytic Properties ◽  
Bet Surface Area ◽  
High Catalytic Activity ◽  
Complete Oxidation ◽  
Functionalized Silica ◽  
Ordered Structures ◽  
Mesoporous Metal Oxides ◽  
Mesoporous Metal

Mesoporous metal oxides and mixed oxides, such as NiO, CeO2, Cr2O3, Fe2O3, Mn2O3, NiFe2O4 and CexZr1−xO2 (x = 0.8 and 0.6) have been synthesized by nanocasting from mesoporous cubic (Ia3d) vinyl-functionalized silica (vinylsilica). Their structural properties were characterized by XRD, TEM, N2-sorption and Raman spectra. Thus-prepared mesoporous materials possess a high BET surface area (110–190 m2g−1), high pore volume (0.25–0.40 cm3g−1) and relatively ordered structures. The catalytic properties of Cr2O3 were tested in the oxidation of toluene. The mesoporous Cr2O3 exhibits unusually high catalytic activity in the complete oxidation of toluene as compared with commercial Cr2O3.

Combustion Synthesis of Sr-Substituted LaCo0.4Fe0.6O3 Powders

1992 ◽  
Vol 271 ◽  
Author(s):  
J. J. Kingsley ◽  
L. A. Chick ◽  
G. W. Coffey ◽  
D. E. McCready ◽  
L. R. Pederson
Keyword(s):  
Solid State ◽  
Metal Oxides ◽  
Mixed Oxides ◽  
Electronic Conductivity ◽  
Solid State Reactions ◽  
Bet Surface Area ◽  
Metal Nitrates ◽  
Subsequent Calcination ◽  
Multi Phase ◽  
Sorption Characteristics

ABSTRACTSr-substituted perovskite LaCo0.4Fe0.6O3 is known to have excellent mixed ionic and electronic conductivity and increased O2 sorption characteristics. These perovskites are usually prepared by lengthy solid-state reactions of the component oxides at temperatures near 1150°C, and often produce inhomogeneous, multi-phase powders. Presently, it has been prepared by the calcination of combustion-derived fine mixed oxides at 850°C in 6 hrs. Combustion reactions are carried out using precursor solutions containing the corresponding metal nitrates (oxidizers) and glycine (fuel) at 250°C. The metal oxides produced by this process and subsequent calcination were characterized by XRD, TEM and BET surface area analysis.

Kinetic and catalytic analysis of mesoporous metal oxides on the oxidation of Rhodamine B

2018 ◽  
Vol 440 ◽  
pp. 1130-1142 ◽  
Author(s):  
Morena S. Xaba ◽  
Ji-Hyang Noh ◽  
Keabetswe Mokgadi ◽  
Reinout Meijboom
Keyword(s):  
Metal Oxides ◽  
Rhodamine B ◽  
Mesoporous Metal Oxides ◽  
Mesoporous Metal

scholarly journals Designing and Fabricating Ordered Mesoporous Metal Oxides for CO2 Catalytic Conversion: A Review and Prospect

Materials ◽  
2019 ◽  
Vol 12 (2) ◽  
pp. 276 ◽  
Author(s):  
Yan Cui ◽  
Xinbo Lian ◽  
Leilei Xu ◽  
Mindong Chen ◽  
Bo Yang ◽  
...  
Keyword(s):  
Metal Oxides ◽  
Active Sites ◽  
Porous Metal ◽  
Catalytic Conversion ◽  
Thermal Stabilities ◽  
Heterogeneous Catalytic ◽  
Mesoporous Metal Oxides ◽  
Internal Surfaces ◽  
Ordered Mesoporous ◽  
Mesoporous Metal

In the past two decades, great progress has been made in the aspects of fabrication and application of ordered mesoporous metal oxides. Ordered mesoporous metal oxides have attracted more and more attention due to their large surface areas and pore volumes, unblocked pore structure, and good thermal stabilities. Compared with non-porous metal oxides, the most prominent feature is their ability to interact with molecules not only on their outer surface but also on the large internal surfaces of the material, providing more accessible active sites for the reactants. This review carefully describes the characteristics, classification and synthesis of ordered mesoporous metal oxides in detail. Besides, it also summarizes the catalytic application of ordered mesoporous metal oxides in the field of carbon dioxide conversion and resource utilization, which provides prospective viewpoints to reduce the emission of greenhouse gas and the inhibition of global warming. Although the scope of current review is mainly limited to the ordered mesoporous metal oxides and their application in the field of CO2 catalytic conversion via heterogeneous catalysis processes, we believe that it will provide new insights and viewpoints to the further development of heterogeneous catalytic materials.

Generalized syntheses of large-pore mesoporous metal oxides with semicrystalline frameworks

Nature ◽  
10.1038/24132 ◽  
1998 ◽  
Vol 396 (6707) ◽  
pp. 152-155 ◽  
Author(s):  
Peidong Yang ◽  
Dongyuan Zhao ◽  
David I. Margolese ◽  
Bradley F. Chmelka ◽  
Galen D. Stucky
Keyword(s):  
Metal Oxides ◽  
Large Pore ◽  
Mesoporous Metal Oxides ◽  
Mesoporous Metal

Fabrication of Crystalline Mesoporous Metal Oxides and Sulfides

2010 ◽  
Vol 49 (3) ◽  
pp. 1191-1197 ◽  
Author(s):  
Keyan Xue ◽  
Dairong Chen ◽  
Xiuling Jiao
Keyword(s):  
Metal Oxides ◽  
Mesoporous Metal Oxides ◽  
Mesoporous Metal
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