A5066809147- Solid-state spectroscopy and crystallography
- Perovskite Materials and Applications
- Magnetic and transport properties of perovskites and related materials
- Thermal and Kinetic Analysis
- Multiferroics and related materials
- Gas Sensing Nanomaterials and Sensors
- Crystal Structures and Properties
- Thermal Expansion and Ionic Conductivity
- X-ray Diffraction in Crystallography
- Transition Metal Oxide Nanomaterials
- Electrocatalysts for Energy Conversion
- Chemical Thermodynamics and Molecular Structure
- Advanced Condensed Matter Physics
- Ferroelectric and Piezoelectric Materials
- Microwave Dielectric Ceramics Synthesis
- Chalcogenide Semiconductor Thin Films
- Science Education and Pedagogy
- Radioactive element chemistry and processing
- Advancements in Solid Oxide Fuel Cells
- Pigment Synthesis and Properties
- Chemical and Physical Properties in Aqueous Solutions
- Neural Networks and Applications
- Innovative Teaching and Learning Methods
- Microstructure and Mechanical Properties of Steels
- Organic and Molecular Conductors Research
Saints Cyril and Methodius University of Skopje
2002-2025
Institute of Chemistry
1992-2024
University of Ss. Cyril and Methodius in Trnava
2011-2023
Goce Delcev University
2014-2016
Macedonian Academy of Sciences and Arts
2016
Institute for Nuclear Research and Nuclear Energy
2010
Institute of General and Inorganic Chemistry
2010
Institute for Solid State Physics and Optics
2010
In this paper, the synthesis, characterization, and investigation of electrocatalytic properties perovskites general formula PrMn0.5M0.5O3 (M = Cr, Fe, Co, Ni) are presented. The synthesis was conducted by solution combustion method using glycine as a fuel. perovskite with PrMn0.5Fe0.5O3 also synthesized sol–gel citric acid obtained were investigated X-ray powder diffraction (XRPD), scanning electron microscopy (SEM) energy dispersive spectroscopy (EDX), infrared spectroscopy, cyclic...
Abstract The unit cell edge length, a, of a set complex cubic perovskites having the general formula A22+BB′O6 is predicted using two methodologies: multiple linear regression and artificial neural neworks. length expressed as function six independent variables: effective ionic radii constituents (A, B B′), electronegativities B′, oxidation state B. In this analysis, 147 type, structure belonging to Fm3m space group, are included. They divided in sets; 98 compounds used calibration 49 test...
The crystal structures at room (296 K) and low (173 temperature of several alpha-alums have been refined by single-crystal X-ray structure analysis. Many known are disordered, the sulfate anions occupying one two possible sites. All those studied here exhibited such disorder relative occupancies sites in excellent agreement with obtained Raman spectroscopy, where nu1(SO4) mode is seen as a doublet owing to presence different types ion. No phase transitions were noted on cooling but there...
Perovskite series GdCr 1− x Co O 3 ( = 0, 0.33, 0.5, 0.67 and 1) was obtained using a solution combustion method. The powder XRD used for identification structural characterization of the perovskites. All compounds crystallize within space group Pnma . morphology samples studied SEM impedance AC conductivity were spectroscopy in frequency range from 10 Hz to MHz temperature interval 297–337 K. Changes electric modulus DC conductivity, with increasing value structures, observed. obeyed...
The dielectric relaxation of GdCr1−xCoxO3 (x = 0, 0.33, 0.5 and 1) was studied using spectroscopy. study performed in a frequency range from 10 Hz to MHz temperature interval 297 K–337 K. Changes constant electric modulus with increasing Cr/Co substitution the structures were observed. obtained results loss analyzed introducing model hopping charge carrier over potential barrier between charged defects. conduction mechanism for pure mixed discussed detail.
Transmission infrared, Attenuated Total Reflectance (ATR) and Raman spectra of crystalline methylammonium iodide (MAI) formamidinium (FAI) in the temperature interval starting from –170 ºC to 200 were studied. The recorded region 4000 500 cm–1 enabled resolving ambiguities associated with origin some bands. For first time a complete detailed vibrational investigation assignment IR these compounds based on differences dependent for all phases, including metastable ones, have been made....
In this work, the unit cell parameter ( a ) of series cubic ABX 3 perovskites was modeled using counter‐propagation artificial neural networks, and influence different input variables examined by algorithm for automatic adjustment relative importance variables. The used in model were ionic radii A, B, X as well oxidation state z electronegativity χ anion. developed models have good generalization performances—good agreement between experimental predicted values lattice parameter. One...
In the last decade, most investigated perovskite materials are hybrid organic-inorganic perovskites (HOIPs) due to their optoelectronic properties and possible application in production of photovoltaics. This interest has led an ongoing search for new HOIP variants, alongside thorough investigations existing HOIPs. That is why our research field aimed at synthesis, characterization, investigation electrochemical dimethylammonium lead iodide (DMAPbI3) using voltammetric studies. A modified...
In order to demonstrate the possibility of predicting structural parameters members in a sequence isostructural compounds, kieserite group isotypes (with general formula M II X O 4 .H 2 O) were chosen since number them have accurately refined crystal structures. The unit-cell and fractional atomic coordinates shown vary linearly with both cation anion size. This makes it possible calculate particular member, taking into account only effective ionic radii constituent atoms. Agreement between...
YCr1−xFexO3 materials with x = 0; 0.125; 0.25; 0.33; 0.5; 0.67; 0.75; 0.875 and 1 have been prepared by solution combustion method followed thermal treatment at 800° C in air. X‐ray powder diffraction spectra of samples confirmed the formation solid solutions within whole concentration interval. All were successfully indexed orthorhombic Pnma space group. Neutron measurements room temperature that some studied are antiferromagnetically ordered. This is consistent asymptotic Curie...
Double sulfates of cobalt(II), nickel(II), copper(II) and zinc with the monomethylammonium cation were obtained from reaction mixture corresponding metal sulfate in a molar ratio 1∶3. The compounds studied by methods X-ray powder diffraction, TG DSC analysis elemental analysis. It was found that double have formula (CH3NH3)2M(SO4)2· 6H2O, cobalt, nickel are isostructural. relationship between crystal structure thermal decomposition is discussed.