1.

Novak T.N.,Ristić,A,Cecowski,S,Arčon,I,Lazar,K,Amenitsch,H,Kaučič,V. Local environment of isolated iron in mesoporous silicate catalyst FeTUD-1.

Mesoporous silicate catalyst FeTUD-1 containing only isolated iron was synthesized. Local environment of iron was investigated by XAS and Möossbauer spectroscopies. XANES show that iron in the as-synthesized and template-free FeTUD-1 is present in the form of Fe3+. EXAFS reveal that Fe3+ in the as-syn. sample is coordinated to 4 O at the distance of 1.87A and in template-free sample to 1 O at 1.86A and 5 O at 2.0A distances. Möss. spectroscopy proves the presence of Fe3+ in template-free sample. Moreover, it determines Fe3+ in two types of distorted octahedral coordinations.

COBISS.SI-ID: 3752986

2.

RISTIĆ, A., NOVAK T, N, CECOWSKI, S, MAZAJ, M, KAUČIČ, V. Two-step synthesis and characterization of a new disordered mesoporous Mnsilicate MnKIL-1.

New mesoporous manganese silicate MnKIL-1 was prepared by two-step synthesis. Solvothermal treatment in ethanol in the second step of the synthesis gave rise of a disordered mesoporous silicate structure with the pore openings of 16 nm. The porosity of the new material was investigated by powder X-ray diffraction (XRD), transmission electron microscopy (TEM) and nitrogen sorption. UV-Vis spectroscopy results suggested that the Mn2+ and Mn3+ cations were coordinated in the mesoporous silicate structure in the octahedral and tetrahedral environments, respectively.

COBISS.SI-ID: 4271130

3.

RISTIĆ, A, NOVAK T, N, CECOWSKI, S, MAZAJ, M, KAUČIČ, V. Structural characterization of a new mesostructured manganese silicate MnKIL-1.

New mesostructured manganese silicate named MnKIL-1 was synthesised using a cost-effective and environmental friendly two-step preparation method. Solvothermal treatment in ethanol in the second step of the synthesis gave rise of a wormhole silicate structure with the pore openings from 5 to 25 nm. The high surface area, large pore openings and manganese, placed in the framework, with manganese oxides located in pores, make this new material MnKIL-1 as an excellent candidate for catalysis and energy storage.

COBISS.SI-ID: 4287002

4.

Z LOGAR,N, NOVAK T,N, RISTIĆ,A, MALI,G, MAZAJ,M, KAUČIČ,V. Functionalisation and structure characterisation of porous silicates and aluminophosphates.

This chapter encompasses some recent achievements in preparation and structure characterisation of transition metal modified nanoporous silica- and phosphate-based framework materials for catalytic applications. Examples of successful preparation and functionalisation of new nanoporous solids using hydrothermal conventional and microwave procedures are Mn-, Fe- or Ti-containing microporous and mesoporous silicates and aluminophosphates, microporous/mesoporous silicate composites with nanosized zeolitic particles as well as mesoporous aluminophosphate thin films.

COBISS.SI-ID: 4005914

5.

MILOJEVIĆ,M,DONDUR,V,DAMJANOVIĆ,L,RAKIĆ,V,RAJIĆ,N,RISTIĆ,A,Activity of iron-cont. zeolitc materials for the catalytic oxidation in aq. solutions.

A series of iron-containing zeolitic materials (FeAPOs, FeBEA, FeY and FeZSM-5) has been tested as heterogeneous catalysts for decomposition of H2O2 and for oxidation of the cationic dye Methylene Blue with H2O2 in aqueous solutions. It has been shown that both tetrahedral, framework Fe, and octahedral, extra-framework Fe species incorporated into zeolite structure are catalytically active in wet oxidation reactions.

COBISS.SI-ID: 3693338