Large cage face-centered-cubic Fm3m mesoporous silica: Synthesis and structure

Article Abstract:

An aqueous synthesis method to prepare highly ordered large-cage mesoporous silica with cubic Fm3m close packed structure, based on the use of TEOS with EO(sub 106)PO(sub 70)EO(sub 106) triblock copolymer (F127) at low HCI concentrations is developed. It is confirmed that simple application of hydrothermal treatments at various temperatures ranging from 45 to 150 degree centigrade enables an effective tailoring of the mesopore diameters and apertures.

Copolymers

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Silica orthorhombic mesostructured films with low refractive index and high thermal stability

Article Abstract:

Silica mesoporous films with an orthorhombic mesostructure are synthesized via Evaporation Induced Self-Assembling (EISA). An optimized thermal treatment applied to the silica mesostructured films enhanced the thermal stability of the organized phase up to 950 degree C and a progressive thermal treatment with different increasing steps of 100 degree C, allowed controlling the condensation and the thermal dehydroxylation of the silica walls.

Science & research, Research, Observations, Chemistry, Physical and theoretical, Physical chemistry, Evaporation

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Highly loaded and thermally stable Cu-containing mesoporous silica-active catalyst for the NO+CO reaction

Article Abstract:

The synthesis of a highly loaded and thermally stable Cu-containing mesoporous silica, which is developed by making use of poly(acrylic acid) (Pac) assembled with surfactant (C(sub 16)TAB), as template is reported. Poly(acrylic acid) is used not only as a micelle structural component but also has a complexation agent for Cu(II) species resulting in high metal loading and increased thermal stability of the mesoporous network.

Primary copper, Secondary nonferrous metals, Analysis, Copper, Catalysis, Copper (Metal), Chemical properties

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