Letno poročilo 2005

Laboratorij za anorgansko kemijo in tehnologijo
Laboratory for Inorganic Chenistry and Technology
manganom in `elezom modificirana mezoporozna
aluminofosfata MnHMA in FeHMA ter
z manganom modificiran mezoporozen silikat
MnMCM-41. Mezoporozno strukturo smo
raziskali z rentgensko difrakcijo (XRD) in
presevnim mikroskopom visoke lo~ljivosti
(HRTEM). Lokalno okolico mangana in `eleza
smo dolo~ili z rentgensko absorpcijsko
spektroskopijo (EXAFS, XANES), jedrsko
magnetno resonanco (NMR), elektronsko
paramagnetno resonanco (EPR) ter Mössbauerjevo
spektroskopijo. Rezultati strukturne
karakterizacije ka`ejo na termi~no stabilne
mezoporozne materiale s katalitskimi lastnostmi
zaradi vgrajenega mangana in `eleza v
mezoporozno ogrodje. Nadaljnje raziskave
produktov bodo potekale v sklopu sodelovanja
z drugimi laboratoriji v okviru EU projekta IN-
SIDE PORES.
SLIKA 1:
(a) HRTEM (Presevna Elektronska Mikroskopija Visoke
Lo~ljivosti) fotografija delca mezoporoznega
aluminofosfata. (b) Pove~ava izreza iz Slike (a)
prikazuje domene s heksagonalno ureditvijo kanalov,
ki pa so slabo vidne. (c) FFT filtrirana slika tega izreza
razkrije vzorec s heksagonalno ureditvijo kanalov, ki
je na ve~ mestih prekinjen z dislokacijami, ki so delno
posledica izpostavljanju mo~nega elektronskega toka
na vzorcu.
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structure was confirmed by X-ray powder diffraction
(XRD) and high resolution transmission
microscopy (HRTEM). X-ray absorption
spectroscopy (XANES, EXAFS), nuclear magnetic
resonance (NMR), electron paramagnetic
resonance (EPR) and Mössbauer spectroscopy
revealed the local structure of manganese or
iron. The characterisation results showed that
stable mesoporous materials with catalytic
properties were prepared. Further research on
prepared products will include the collaboration
with other laboratories within the frame
of EU project INSIDE PORES.
Cement research:
The research with collaboration with Salonit
Anhovo d.d., Deskle, Slovenia, resulted in the
completion of the study on the influences of
variously soluble carbonates on overall hydration
and final phase development and compo-
FIGURE 1:
(a) HRTEM (High Resolution Transmission Electron
Microscopy) image of the mesoporous
aluminophosphate particle. (b) A close-up of the detail
from the raw image in Fig. 3 (a) shows faint hexagonal
features in some visible in some parts of the
image. (c) FFT filtered image of this detail clearly reveals
a close-packed hexagonal pattern disrupted with
several dislocations and stacking faults, which have
been partly induced by a relatively strong electron
irradiation.