The chapter in the monograph, with contributions from the world’s most recognized groups in the field of nanoporous materials, is reviewing the work of our research group on the synthesis and characterization of nanoporous catalysts in the last five years. The emphasis is on our case-studies of new silicate and aluminophosphates catalysts in the form of thin films and powders.
COBISS.SI-ID: 4005914
The article describes the preparation of micro/mesoporous silicate composite Ti-Beta/SBA-15. The composite was synthesized by the deposition of catalytically active titanium-modified zeolite Beta within channels of mesoporous silicate matrix SBA-15. The material was hydrothermally stable. The presence of zeolitic nanoparticles within mesoporous channels was proven by transmission electron microscopy and nitrogen physisorption analysis. Local environment of Ti-cations, representing catalytically active sites, was determined by X-ray absorption spectroscopy.
COBISS.SI-ID: 4066074
Publication describes the parameters which influence the crystallization of amorphous walls of mesoporous Al-SBA-15 into microporous silicate ZSM-5. Combined use of NMR spectroscopy and N2 sorption confirmed the presence of mesopores and micropores and of the connections between them. The obtained material exhibits fast diffusion of large molecules through mesopores and high hydrothermal stability. These properties make it a promising heterogeneous catalyst.
COBISS.SI-ID: 4147994
The paper deals with effectiveness studies of natural zeolites from Donje Jesenje (Croatia) and Vranjska Banja (Serbia) for the removal of arsenite and arsenate anions from the water solutions. Detailed structural characterization of zeolites with sorbed anions enabled determination of zeolite sorption capacity and sorption mechanism – arsenic is irreversibly adsorbed on the zeolite surface. The studies confirmed the effectiveness of selected natural zeolites and improved the understanding of sorption mechanisms.
COBISS.SI-ID: 1013755
Concrete abrasion in hydraulic structures, which is caused by the abrasion process resulting from the sediment carried by water, is analyzed. Qualitat. similarity of the level of abrasion of concrete between lab. simulat. and measur. in the field, as well as suitability of the ASTM C1138 lab. method for the asses. of abrasion resist. of concretes in the spillway of the HPP chain on the Lower Sava is showed. The quantitat. comparison of results show good correl. between the lab. and measur. in the nat. environ. for the concrete at 900 days, for the 90 days, this correl. could not be confirmed.
COBISS.SI-ID: 4602209