Synthesis of thermally stable zirconia-based mesoporus materials via a facile post-treatment

Article Abstract:

A new method was used to prepare thermally stable zirconia-based mesoporus materials by using zirconium sulfate as the zirconium source and cetyltrimethylammonium (CTMA) ion as the pore-directing agent with the aid of NaCl salt. It was found that a portion of the surfactant and sulfate ions were removed during the post-treatment which prevented the remaining sulfate groups from being reduced by the hydrogen-rich surfactant during the calcination process.

All Other Basic Inorganic Chemical Manufacturing, Industrial inorganic chemicals, not elsewhere classified, Zirconium Compounds, Methyl groups, Methyl compounds

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Mechanistic aspects of the solid-state transformation of ammonium cyanate to urea at high pressure

Article Abstract:

The self-consistent-charges density-functional tight-binding (SCC-DFTB) method is used to investigate the behavior of ammonium cyanate in the solid state under high pressure. The results have shown that the transformation of ammonium cyanate into urea is strongly exothermic.

Science & research, Research, Analysis, Density functionals, Density functional theory, Solid state chemistry

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