Aqueous synthesis of high surface area metal oxides

High surface area and uniform nano-sized TiO2 and ZrO2 were prepared readily by the infiltration of metal alkoxides into the nanoporous SiO2, SBA-15 and the following selective dissolution of SiO2. The obtained particles of TiO2 and ZrO2, 8.1 nm were nanocrystalline of which the structure were anatase and tetragonal, respectively. The surface area and pore volume of the nanocrystalline metal oxides can be increased to above 200 m2g-1 and 0.30 cm3g-1, respectively.

Download Full-text

A general and low-cost synthetic route to high-surface area metal oxides through a silica xerogel template

Journal of Physics and Chemistry of Solids ◽

10.1016/j.jpcs.2004.09.010 ◽

2005 ◽

Vol 66 (5) ◽

pp. 741-747 ◽

Cited By ~ 26

Author(s):

Antonio B. Fuertes

Keyword(s):

Metal Oxides ◽

Surface Area ◽

Low Cost ◽

High Surface ◽

High Surface Area ◽

Silica Xerogel ◽

Synthetic Route

Download Full-text

Two-step synthesis of Fe2O3and Co3O4nanoparticles: towards a general method for synthesizing nanocrystalline metal oxides with high surface area and thermal stability

RSC Advances ◽

10.1039/c1ra00552a ◽

2012 ◽

Vol 2 (1) ◽

pp. 121-124 ◽

Cited By ~ 7

Author(s):

Junjiang Zhu ◽

Xiaoying Ouyang ◽

Ming-Yung Lee ◽

Ryan C. Davis ◽

Susannah L. Scott ◽

...

Keyword(s):

Thermal Stability ◽

Metal Oxides ◽

Surface Area ◽

High Surface ◽

High Surface Area ◽

Nanocrystalline Metal ◽

General Method

Download Full-text

Syntheses of Nanostructured Magnesium Carbonate Powders with Mesoporous Structures from Carbon Dioxide

Applied Sciences ◽

10.3390/app11031141 ◽

2021 ◽

Vol 11 (3) ◽

pp. 1141

Author(s):

Fernando J. Rodríguez-Macías ◽

José E. Ortiz-Castillo ◽

Erika López-Lara ◽

Alejandro J. García-Cuéllar ◽

José L. López-Salinas ◽

...

Keyword(s):

Carbon Dioxide ◽

Surface Area ◽

High Surface ◽

High Surface Area ◽

Magnesium Carbonate ◽

Synthesis Methods ◽

X Ray Diffraction ◽

Aqueous Synthesis ◽

Synthesis Time ◽

X Ray

In this work, we present the results of two synthesis approaches for mesoporous magnesium carbonates, that result in mineralization of carbon dioxide, producing carbonate materials without the use of cosolvents, which makes them more environmentally friendly. In one of our synthesis methods, we found that we could obtain nonequilibrium crystal structures, with acicular crystals branching bidirectionally from a denser core. Both Raman spectroscopy and X-ray diffraction showed these crystals to be a mixture of sulfate and hydrated carbonates. We attribute the nonequilibrium morphology to coprecipitation of two salts and short synthesis time (25 min). Other aqueous synthesis conditions produced mixtures of carbonates with different morphologies, which changed depending on drying temperature (40 or 100 °C). In addition to aqueous solution, we used supercritical carbon dioxide for synthesis, producing a hydrated magnesium carbonate, with a nesquehonite structure, according to X-ray diffraction. This second material has smaller pores (1.01 nm) and high surface area. Due to their high surface area, these materials could be used for adsorbents and capillary transport, in addition to their potential use for carbon capture and sequestration.

Download Full-text