Progress in heteroatom - containing aluminophosphate molecular sieves
نویسندگان
چکیده
Over the past 30 years, heteroatom-containing aluminophosphate molecular sieves as a prime class of heterogeneous single-site solid catalysts have been quickly developed since the first discovery of aluminophosphate molecular sieves in 1982, and a large variety of such materials with 48 unique zeotype structures have been prepared. This work mainly presents the progress in the development of heteroatom-containing aluminophosphate molecular sieves with new zeolite structures and variable framework compositions in recent years.
منابع مشابه
The first synthesis of organosilyl-substituted aluminophosphate molecular sieves.
Organosilyl groups were successfully incorporated in AFI and VFI aluminophosphate frameworks using organoalkoxysilanes to modify hydrophobicity and acidity of the molecular sieves.
متن کاملFurther Studies on Aluminophosphate Molecular Sieves Part 1 . - AIPO , - HS : A Hydrated Aluminophosphate Molecular Sieve
Pure, highly crystalline AIPO,-H2 is synthesized from an aluminophosphate gel containing dipentylamine and characterized using X-ray diffraction, Fourier-transform infrared spectroscopy, scanning electron microscopy, thermogravimetry and solid-state nuclear magnetic reson!nce spectroscopy. The AIPO,-H2 structure has orthorhombic symmetry with cell parameters of a = 16.184(5) A, b = 9.914(3) A a...
متن کاملIonothermal synthesis of aluminophosphate molecular sieves
Effects of ionic liquid structures on the aluminophosphate molecular sieve products in ionothermal synthesis process were investigated. The results showed that the possible structure-directing effect of ionic liquid might exist during ionothermal synthesis. Microwave heating was introduced into the ionothermal synthesis, which led to a fast and safe process for preparation of molecular sieves. ...
متن کاملNew insights into the role of amines in the synthesis of molecular sieves in ionic liquids.
A combination of state-of-the art in situ one- and two-dimensional NMR spectroscopy and density functional theory (DFT) calculations have been employed for the first time to investigate the role of amines in the synthesis of aluminophosphate molecular sieves in ionic liquids (ILs). In situ rotating-frame nuclear Overhauser effect spectroscopy (ROESY) was used to demonstrate that the hybrid of i...
متن کاملInvestigations of Aluminophosphate Molecular Sieves Applying Noble Gas and Methane Nmr Spectroscopy
In this thesis, nuclear magnetic resonance (NMR) spectroscopy of noble gas atoms and methane molecule is applied to the structure studies of solid microporous materials (molecular sieves). This is an indirect method, where changes to the spectral parameters (i.e. isotropic and anisotropic nuclear shielding tensors) of the adsorbate induced by the investigated environment are measured at variabl...
متن کامل