Al content dependent hydrothermal stability of directly synthesized aluminosilicate MCM-41

Article Abstract:

An attempt is made to investigate the aluminosilicate MCM-41 materials with Si/Al ratio between 10 and 50 were prepared namely, direct mixed-gel synthesis, and their hydrothermal stability in boiling water using a variety of techniques including powder XRD, N2 sorption studies, and elemental analysis. It is revealed that Al incorporated on the surface/near surface region of the pore walls provide the greatest protection.

Semiconductors and related devices, Semiconductor and Related Device Manufacturing, Science & research, Multichip Hybrid Circuits, Research, Aluminum, Multichip module, Multichip modules

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Mesostructured hollow spheres of graphitic N-doped carbon nanocast from spherical mesoporous silica

Article Abstract:

Mesostructured hollow spheres of graphitic N-doped carbon (CNx) materials may be noncast from solid core mesoporous silica SBA-15 spheres through a chemical vapor deposition (CVD) route. The hollow spheres are generated when the SBA-15 silica/carbon composite obtained after CVD is subjected to silica etching in hydrofluoric (HF) acid.

All Other Basic Inorganic Chemical Manufacturing, Industrial inorganic chemicals, not elsewhere classified, Nitrogen Compounds, Electric properties, Carbon

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Formation of molecularly ordered layer mesoporous silica via phase transformation of silicate-surfactant composites

Article Abstract:

The process of preparing molecularly ordered layered silicate-surfactant mesophases from the stepwise phase transformation of surfactant-silicate composites is described. The resulted calcined molecularly ordered layered mesoporous silica exhibit structurally well-ordered domains with relatively high surface area and pore volume.

Methods, Analysis, Thermal properties, Crystallization, Transition temperature, Phase transition temperatures

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