@article{MTMT:34684508, title = {Debye Temperature Evaluation for Secondary Battery Cathode of α-SnxFe1−xOOH Nanoparticles Derived from the 57Fe- and 119Sn-Mössbauer Spectra}, url = {https://m2.mtmt.hu/api/publication/34684508}, author = {Ibrahim, Ahmed and Tani, Kaoru and Hashi, Kanae and Zhang, Bofan and Homonnay, Zoltán and Kuzmann, Ernő and Bafti, Arijeta and Pavić, Luka and Krehula, Stjepko and Marciuš, Marijan and Kubuki, Shiro}, doi = {10.3390/ijms25052488}, journal-iso = {INT J MOL SCI}, journal = {INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES}, volume = {25}, unique-id = {34684508}, issn = {1661-6596}, abstract = {Debye temperatures of α-SnxFe1−xOOH nanoparticles (x = 0, 0.05, 0.10, 0.15 and 0.20, abbreviated as Sn100x NPs) prepared by hydrothermal reaction were estimated with 57Fe- and 119Sn-Mössbauer spectra measured by varying the temperature from 20 to 300 K. Electrical properties were studied by solid-state impedance spectroscopy (SS-IS). Together, the charge–discharge capacity of Li- and Na-ion batteries containing Sn100x NPs as a cathode were evaluated. 57Fe-Mössbauer spectra of Sn10, Sn15, and Sn20 measured at 300 K showed only one doublet due to the superparamagnetic doublet, while the doublet decomposed into a sextet due to goethite at the temperature below 50 K for Sn 10, 200 K for Sn15, and 100 K for Sn20. These results suggest that Sn10, Sn15 and Sn20 had smaller particles than Sn0. On the other hand, 20 K 119Sn-Mössbauer spectra of Sn15 were composed of a paramagnetic doublet with an isomer shift (δ) of 0.24 mm s−1 and quadrupole splitting (∆) of 3.52 mm s−1. These values were larger than those of Sn10 (δ: 0.08 mm s−1, ∆: 0.00 mm s−1) and Sn20 (δ: 0.10 mm s−1, ∆: 0.00 mm s−1), suggesting that the SnIV-O chemical bond is shorter and the distortion of octahedral SnO6 is larger in Sn15 than in Sn10 and Sn20 due to the increase in the covalency and polarization of the SnIV-O chemical bond. Debye temperatures determined from 57Fe-Mössbauer spectra measured at the low temperature were 210 K, 228 K, and 250 K for Sn10, Sn15, and Sn20, while that of α-Fe2O3 was 324 K. Similarly, the Debye temperature of 199, 251, and 269 K for Sn10, Sn15, and Sn20 were estimated from the temperature-dependent 119Sn-Mössbauer spectra, which were significantly smaller than that of BaSnO3 (=658 K) and SnO2 (=382 K). These results suggest that Fe and Sn are a weakly bound lattice in goethite NPs with low crystallinity. Modification of NPs and addition of Sn has a positive effect, resulting in an increase in DC conductivity of almost 5 orders of magnitude, from a σDC value of 9.37 × 10−7 (Ω cm)−1 for pure goethite Sn (Sn0) up to DC plateau for samples containing 0.15 and 0.20 Sn (Sn15 and Sn20) with a DC value of ~4 × 10−7 (Ω cm)−1 @423 K. This non-linear conductivity pattern and levelling at a higher Sn content suggests that structural modifications have a notable impact on electron transport, which is primarily governed by the thermally activated via three-dimensional hopping of small polarons (SPH). Measurements of SIB performance, including the Sn100x cathode under a current density of 50 mA g−1, showed initial capacities of 81 and 85 mAh g−1 for Sn0 and Sn15, which were larger than the others. The large initial capacities were measured at a current density of 5 mA g−1 found at 170 and 182 mAh g−1 for Sn15 and Sn20, respectively. It is concluded that tin-goethite NPs are an excellent material for a secondary battery cathode and that Sn15 is the best cathode among the studied Sn100x NPs.}, year = {2024}, eissn = {1422-0067}, orcid-numbers = {Ibrahim, Ahmed/0000-0002-5300-0376; Homonnay, Zoltán/0000-0001-5299-5394; Kuzmann, Ernő/0000-0002-0183-6649; Bafti, Arijeta/0000-0001-7343-1299; Pavić, Luka/0000-0003-2232-6602; Marciuš, Marijan/0000-0002-4747-5981; Kubuki, Shiro/0000-0001-8255-7811} } @article{MTMT:34160976, title = {ANALYSIS OF THE IRON STATES IN IRON-CONTAINING PHARMACEUTICAL PRODUCTS USING MÖSSBAUER SPECTROSCOPY}, url = {https://m2.mtmt.hu/api/publication/34160976}, author = {Alenkina, Irina V. and Chukin, Andrey V. and Leitus, Gregory and Denisova, Olga V. and Gracheva, Maria and Felner, Israel and Kuzmann, Ernő and Homonnay, Zoltán and Oshtrakh, Michael I.}, doi = {10.1016/j.jpba.2023.115745}, journal-iso = {J PHARMACEUT BIOMED ANAL}, journal = {JOURNAL OF PHARMACEUTICAL AND BIOMEDICAL ANALYSIS}, volume = {237}, unique-id = {34160976}, issn = {0731-7085}, year = {2024}, eissn = {1873-264X}, orcid-numbers = {Gracheva, Maria/0000-0001-5245-8425; Kuzmann, Ernő/0000-0002-0183-6649; Homonnay, Zoltán/0000-0001-5299-5394; Oshtrakh, Michael I./0000-0002-2937-5194} } @article{MTMT:34323900, title = {Comparison of two pharmaceutical products containing ferrous sulfate using Mössbauer spectroscopy}, url = {https://m2.mtmt.hu/api/publication/34323900}, author = {Oshtrakh, Michael I. and Alenkina, Irina V. and Chukin, Andrey V. and Kuzmann, Ernő and Homonnay, Zoltán}, doi = {10.1007/s10751-023-01835-4}, journal-iso = {HYPERFINE INTERACT}, journal = {HYPERFINE INTERACTIONS}, volume = {244}, unique-id = {34323900}, issn = {0304-3843}, year = {2023}, eissn = {1572-9540}, orcid-numbers = {Kuzmann, Ernő/0000-0002-0183-6649; Homonnay, Zoltán/0000-0001-5299-5394} } @article{MTMT:34266835, title = {Analysis of the differential nonlinearity for the velocity driving systems in Mössbauer spectrometers using thin α-Fe reference absorber}, url = {https://m2.mtmt.hu/api/publication/34266835}, author = {Oshtrakh, Michael I. and Kuzmann, Ernő and Homonnay, Zoltán and Semionkin, Vladimir A.}, doi = {10.1007/s10751-023-01831-8}, journal-iso = {HYPERFINE INTERACT}, journal = {HYPERFINE INTERACTIONS}, volume = {244}, unique-id = {34266835}, issn = {0304-3843}, year = {2023}, eissn = {1572-9540}, orcid-numbers = {Kuzmann, Ernő/0000-0002-0183-6649; Homonnay, Zoltán/0000-0001-5299-5394} } @article{MTMT:34213280, title = {Structural, Electrical, and Electrochemical Properties of a Na2O-V2O5 Ceramic Nanocomposite as an Active Cathode Material for a Na-Ion Battery}, url = {https://m2.mtmt.hu/api/publication/34213280}, author = {Ibrahim, Ahmed and Watanabe, Satoshi and Razum, Marta and Pavić, Luka and Homonnay, Zoltán and Kuzmann, Ernő and Hassaan, Mohamed Yousry and Kubuki, Shiro}, doi = {10.3390/cryst13101521}, journal-iso = {CRYSTALS}, journal = {CRYSTALS}, volume = {13}, unique-id = {34213280}, abstract = {In this paper, a relationship between the structure and the electrical properties of a nanocrystalline composite ceramics xNa2O·(100 − x)V2O5 with ‘x’ of 5, 15, 25, 35, and 45 mol%, abbreviated as xNV, was investigated by X-ray diffractometry (XRD), X-ray absorption spectroscopy (XAS), Cyclic Voltammetry (CV), Electrochemical impedance spectroscopy (EIS), and cathode active performance in Na-ion battery (SIB). For the expected sodium vanadium bronzes (NaxV2O5) precipitation, the preparation of xNV was performed by keeping the system in the molten state at 1200 °C for one hour, followed by a temperature decrease in the electric furnace to room temperature at a cooling rate of 10 °C min−1. XRD patterns of the 15NV ceramic exhibited the formation of Na0.33V2O5 and NaV3O8 crystalline phases. Moreover, the V K-edge XANES showed that the absorption edge energy of ceramics 15NV recorded at 5479 eV is smaller than that of V2O5 at 5481 eV, evidently indicating a partial reduction from V5+ to V4+ due to the precipitation of Na0.33V2O5. In the cyclic voltammetry, reduction peaks of 15NV were observed at 1.12, 1.78 V, and 2.69 V, while the oxidation peak showed up only at 2.36 V. The values of the reduction peaks were related to the NaV3O8 crystalline phase. Moreover, the diffusion coefficient of Na+ (DNa+) gradually decreased from 8.28 × 10−11 cm2 s−1 to 1.23 × 10−12 cm2 s−1 with increasing Na2O content (x) from 5 to 45 mol%. In the evaluation of the active cathode performance of xNV in SIB, ceramics 15NV showed the highest discharge capacity 203 mAh g−1 at a current rate of 50 mA g−1. In the wider voltage range from 0.8 to 3.6 V, the capacity retention was maintained at 50% after 30 cycles, while it was significantly improved to 90% in the narrower voltage range from 1.8 to 4.0 V, although the initial capacity decreased to 56 mAh g−1. It is concluded that the precipitation of the Na0.33V2O5 phase improved the structural and electrical properties of 15NV, which provides a high capacity for the Na-ion battery when incorporated as a cathode active material.}, year = {2023}, eissn = {2073-4352}, orcid-numbers = {Ibrahim, Ahmed/0000-0002-5300-0376; Pavić, Luka/0000-0003-2232-6602; Homonnay, Zoltán/0000-0001-5299-5394; Kuzmann, Ernő/0000-0002-0183-6649; Kubuki, Shiro/0000-0001-8255-7811} } @article{MTMT:34194400, title = {STUDY OF GIBEON IVA IRON METEORITE BY SCANNING ELECTRON MICROSCOPY, X-RAY DIFFRACTION, MAGNETIZATION MEASUREMENTS AND MOSSBAUER SPECTROSCOPY}, url = {https://m2.mtmt.hu/api/publication/34194400}, author = {Goryunov, M. V. and Varga, G. and Dankházi, Zoltán and Felner, I. and Chukin, A. V. and Kuzmann, Ernő and Homonnay, Zoltán and Grokhovsky, V. I. and Oshtrakh, M. I.}, journal-iso = {METEORIT PLANET SCI}, journal = {METEORITICS & PLANETARY SCIENCE}, volume = {58}, unique-id = {34194400}, issn = {1086-9379}, year = {2023}, eissn = {1945-5100}, pages = {A108-A108}, orcid-numbers = {Dankházi, Zoltán/0000-0001-9545-2015; Kuzmann, Ernő/0000-0002-0183-6649; Homonnay, Zoltán/0000-0001-5299-5394} } @article{MTMT:34188040, title = {New photo-Fenton type catalyst of soda-lime aluminosilicate glass prepared by recycling waste slag–a review}, url = {https://m2.mtmt.hu/api/publication/34188040}, author = {Ibrahim, A. and Ali, A.S. and Khan, Irfan and Zhang, B. and Sinkó, Katalin and Homonnay, Zoltán and Kuzmann, Ernő and Krehula, S. and Ristić, M. and Musić, S. and Pavić, L. and Santić, A. and Kubuki, S.}, doi = {10.1007/s10967-023-09127-5}, journal-iso = {J RADIOANAL NUCL CH LE (1984-1996)}, journal = {JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY- LETTERS}, volume = {332}, unique-id = {34188040}, issn = {0236-5731}, year = {2023}, pages = {3859-3878}, orcid-numbers = {Sinkó, Katalin/0000-0003-3244-6819; Homonnay, Zoltán/0000-0001-5299-5394; Kuzmann, Ernő/0000-0002-0183-6649} } @article{MTMT:34181984, title = {Characterization of iron meteorites by scanning electron microscopy, x-ray diffraction, magnetization measurements, and Mossbauer spectroscopy: Mundrabilla IAB-ung}, url = {https://m2.mtmt.hu/api/publication/34181984}, author = {Goryunov, M. V. and Varga, G. and Dankházi, Zoltán and Chukin, A. V. and Felner, I. and Kuzmann, Ernő and Grokhovsky, V. I. and Homonnay, Zoltán and Oshtrakh, M. I.}, doi = {10.1111/maps.14070}, journal-iso = {METEORIT PLANET SCI}, journal = {METEORITICS & PLANETARY SCIENCE}, volume = {58}, unique-id = {34181984}, issn = {1086-9379}, abstract = {A fragment of Mundrabilla IAB-ung iron meteorite was analyzed using optical microscopy, scanning electron microscopy (SEM) with energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), magnetization measurements, and Mossbauer spectroscopy. The polished section of meteorite fragment characterization by optical microscopy and SEM shows the presence of the gamma-Fe(Ni, Co) phase lamellae, plessite structures and schreibersite inclusions in the alpha-Fe(Ni, Co) phase. EDS indicates variations in the Ni concentrations in the following ranges: (i) similar to 6.3-6.5 atom% in the alpha-Fe(Ni, Co) phase and (ii) similar to 22 to similar to 45 atom% in the gamma-Fe(Ni, Co) phase lamellae including the range of similar to 29-33 atom% of Ni leading to the paramagnetic state of the gamma-Fe(Ni, Co) phase. Schreibersite inclusions contain similar to 23 atom% of P, similar to 33 atom% of Fe, similar to 43 atom% of Ni, and similar to 0.7 atom% of Co. Plessite structure contains the average Ni concentration of similar to 17 atom% while detailed EDS analysis shows: (i) the lowest Ni concentrations of similar to 5 to similar to 8 atom%, (ii) the intermediate Ni concentrations of similar to 9 to similar to 19 atom%, and (iii) the highest Ni concentration up similar to 38 atom% (some individual micro-grains demonstrate up to similar to 47 and similar to 59 atom% of Ni) that may indicate the presence of the (i) alpha-Fe(Ni, Co), (ii) alpha(2)-Fe(Ni, Co), and (iii) gamma-Fe(Ni, Co) phases. These may be a result of the c-phase decomposition with mechanism gamma -> alpha + alpha(2) + gamma that indicates a slow cooling rate for Mundrabilla IAB-ung iron meteorite. The presence of similar to 98.6 wt% of the alpha-Fe(Ni, Co) phase and similar to 1.4 wt% of the gamma-Fe(Ni, Co) phase is found by XRD while schreibersite is not detected. Magnetization measurements show the saturation magnetization moment of Mundrabilla IAB-ung of 188(2) emu g(-1) indicating a low average Ni concentration in Fe-Ni-Co alloy. Mossbauer spectrum of the bulk Mundrabilla powder demonstrates five magnetic sextets related to the ferromagnetic alpha(2)-Fe(Ni, Co), alpha-Fe(Ni, Co), and gamma-Fe(Ni, Co) phases and one singlet associated with the paramagnetic gamma-Fe(Ni, Co) phase, however, there are no spectral components corresponding to schreibersite. Basing on relatively larger and smaller values of the magnetic hyperfine field, two magnetic sextets associated with gamma-Fe(Ni, Co) phase can be related to the disordered and more ordered gamma-phases. The iron fractions in the detected phases can be roughly estimated as follows: (i) similar to 17.6% in the alpha(2)-Fe(Ni, Co) phase, (ii) similar to 68.5% in the alpha-Fe(Ni, Co) phase, (iii) similar to 11.5% in the disordered gamma-Fe(Ni, Co) phase, (iv) similar to 2.0% in the more ordered gamma-Fe(Ni, Co) phase, and (v) similar to 0.4% in the paramagnetic gamma-Fe(Ni, Co) phase.}, year = {2023}, eissn = {1945-5100}, pages = {1552-1562}, orcid-numbers = {Dankházi, Zoltán/0000-0001-9545-2015; Kuzmann, Ernő/0000-0002-0183-6649; Homonnay, Zoltán/0000-0001-5299-5394} } @article{MTMT:34107401, title = {Fe spin states and redox processes in Schiff base type complexes}, url = {https://m2.mtmt.hu/api/publication/34107401}, author = {Várhelyi, Csaba, ifj. and Szőke, Á. and Sziráki, Laura and Tomoaia-Cotișel, M. and Homonnay, Zoltán and Szalay, Roland and Simon-Várhelyi, M. and Mereu, R.-A. and Pokol, György and Szilágyi, Imre Miklós and Papp, J. and Mihály, Judith and Kuzmann, Ernő}, doi = {10.1007/s10967-023-09095-w}, journal-iso = {J RADIOANAL NUCL CHEM}, journal = {JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY}, volume = {332}, unique-id = {34107401}, issn = {0236-5731}, year = {2023}, eissn = {1588-2780}, pages = {4125-4139}, orcid-numbers = {Homonnay, Zoltán/0000-0001-5299-5394; Szalay, Roland/0000-0003-3535-5365; Pokol, György/0000-0003-1597-9808; Kuzmann, Ernő/0000-0002-0183-6649} } @article{MTMT:33844959, title = {Characterization of iron meteorites by scanning electron microscopy, X‐ray diffraction, magnetization measurements, and Mössbauer spectroscopy: Gibeon IVA}, url = {https://m2.mtmt.hu/api/publication/33844959}, author = {Goryunov, M. V. and Varga, G. and Dankházi, Zoltán and Felner, I. and Chukin, A. V. and Kuzmann, Ernő and Homonnay, Zoltán and Grokhovsky, V. I. and Oshtrakh, M. I.}, doi = {10.1111/maps.13984}, journal-iso = {METEORIT PLANET SCI}, journal = {METEORITICS & PLANETARY SCIENCE}, volume = {58}, unique-id = {33844959}, issn = {1086-9379}, year = {2023}, eissn = {1945-5100}, pages = {875-884}, orcid-numbers = {Dankházi, Zoltán/0000-0001-9545-2015; Kuzmann, Ernő/0000-0002-0183-6649; Homonnay, Zoltán/0000-0001-5299-5394; Oshtrakh, M. I./0000-0002-2937-5194} }