COSTA, F. O.; http://lattes.cnpq.br/9105265160063327; COSTA, Franciele Oliveira.
Resumo:
This paper aims to synthesize the molecular sieve SBA-15 via conventional
heating using different proportions of co-solvent ethanol improving the structural
organization of material, and using the microwave technology reducing the time of
synthesis of this molecular sieve. In the synthesis of SBA-15 ethanol essentially acts
as a co-solvent in the production of spherical particles. The microwave technology
has been widely used in drying, calcination and synthesis, as has a shorter
processing time, higher heating rate, allowing higher yields and lower thermal
decomposition. Through the XRD patterns was observed that the hexagonal
structure was formed for the two methods. The addition of the cosolvent, improved
the structural organization of the material as well as obtaining a hexagonal array
parameter greater and greater pore size. It has been found through difratometrias to
microwave heating in a reduction of crystallization time to 0.5 hours optimizing the
time of synthesis of SBA-15 molecular sieve. From the spectroscopic analysis in the
infrared region for both heating methods it was possible to identify vibrational
frequencies and their respective roles relating to inorganic functional groups on the
structure of SBA-15 molecular sieve.