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AbstractThere are two parts in his thesis. The first part is the
microwave syntheses of SAPO-11, AlPO4-5, SAPO-34 and MCM-41. The
second part is to study the environment of Ni in NiO/γ-Al2O3 by
EXAFS.In the first part, microwave heating is applied to the
syntheses of AlPO4-5, SAPO-11, SAPO-34 and MCM-41. The products
are characterized by XRD, SEM, MAS-NMR, and ICP-AES. The effects
of water content, template, aluminum source, heating time,
preheating time and secondary synthesis are investigated.
Microwave heating provides a convenient way to synthesize
zeolites in a short time. AlPO4-5 crystals can be obtained after
5 min heating. SAPO-11 crystals appear at 170℃ after 4 hr
heating when aluminum triisopIn the second part, EXAFS is used
to study the environments of Ni in NiO/γ-Al2O3 with different
amounts of NiO loading below the monolayer dispersion capacity.
The coordination number of Ni in the low NiO loading sample is
four. The coordination number of Ni increases with increasing
NiO loading and approaches six with NiO loading of monolayer
capacity.
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