Article
Chemistry, Physical
Xue-Ting Gao, Yi-Fan Wang, Lin Fu, Rui-Xin Zhang, Rui-Min Li, Zhi-Hua Gao, Zhi-Feng Yan, Yi-Ming Liu, Wei Huang, Lei Liu, Zhi-Jun Zuo
Summary: The molybdenum carbide-based catalyst Mo2C/MWCNT shows high electrocatalytic activity and stability in the methanol oxidation reaction, with a higher current density compared to the traditional MoO2/MWCNT and MoO3/MWCNT catalysts.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Materials Science, Coatings & Films
E. Zamulaeva, M. Zinovieva, Ph Kiryukhantsev-Korneev, M. Petrzhik, Yu Yu Kaplanskii, V. V. Klechkovskaya, T. A. Sviridova, N. Shvyndina, E. A. Levashov
Summary: Coatings applied by pulsed electrospark deposition using MoSi2-MoB ceramic electrodes doped with hafnium and zirconium diborides show promising potential in increasing oxidation resistance and extending the service life of heat-resistant nickel-based superalloy parts. The coatings consist of high-temperature beta-MoSi2 phase with inclusions of various components, with higher ZrB2/HfB2 phase content in the electrodes leading to increased hardness and oxidation resistance.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Materials Science, Coatings & Films
Huilun Shi, Menglin Zhang, Lei Zhou, Xuanru Ren, Qiangang Fu
Summary: ZrB2-MoSi2-SiC-Si coatings prepared by the self-propagating high-temperature synthesis method (SHS) demonstrate better oxidation protection compared to coatings prepared with commercial powders after oxidation tests at high temperatures.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Jiawei Xu, Lairong Xiao, Yafang Zhang, Guanzhi Deng, Guanqun Liu, Ruilin Wu, Hongtai Shen, Xiaojun Zhao, Sainan Liu, Zhenyang Cai
Summary: This study presents a new high-temperature antioxidant coating on a tantalum substrate by introducing a TaB2 diffusion barrier. The composite coating showed excellent oxidation resistance and thermal cycle performance, addressing the issue of elemental inter-diffusion at high temperatures.
Article
Materials Science, Multidisciplinary
Rui-Hua Zhang, Zhen-Hua Hao, Lin-Yuan Shi, Hao-Tian Chen, Yong-Chun Shu, Ji-Lin He
Summary: The study demonstrates that increase in reaction temperature and decrease in distance between activated carbon and MoO3 promote the reduction of MoO3 to MoO2. MoO3 is first decomposed into platelet-shaped MoOx, which then transforms into needle-like or irregular platelet-like Mo4O11, eventually forming MoO2 powders.
Article
Chemistry, Multidisciplinary
Nianwang Ke, Haisen Huang, Feihong Wang, Anding Huang, Chuntian Tan, Binbin Dong, Yutong Wu, Luyuan Hao, Xin Xu, Simeon Agathopoulos
Summary: A self-supported MoO2/MoSi2 ceramic electrode with open finger-like holes and excellent electrochemical performance was successfully prepared using phase-inversion, tape-casting, and hydrothermal treatment. This electrode exhibited a lower overpotential than the Pt/C electrode at high current densities in both alkaline and acidic environments. It also demonstrated excellent stability over a wide range of current densities and prolonged periods in both alkaline and acidic solutions. Density functional theory calculations suggested that the MoO2/MoSi2 heterostructure had optimal H adsorption properties.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Chemistry, Physical
Shuai Zhang, Peng Song, Yukun Zheng, Yongling Ding, Qi Wang
Summary: In this study, ternary nanocomposites composed of MoO2/MoO3 and MXene were designed and prepared for low-concentration ethanol detection at room temperature. The nanocomposites utilized the excellent electrical conductivity and large specific surface area of MXene, and the n-n heterojunctions between MoO2 and MoO3 nanosheets enhanced the sensor response. Gas sensing results demonstrated that the MoO2/MoO3/MXene nanocomposites exhibited a high response, excellent selectivity, and fast response-recovery to ethanol at room temperature.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Energy & Fuels
Yanqi Feng, Hui Liu, Yi Liu, Junqi Li
Summary: This study presents a strategy to enhance the energy storage performance of lithium-ion batteries by controlling the concentration of oxygen vacancies and generating MoO3-x/MoO2 heterojunction. The heterojunction exhibits high specific capacity and capacity retention, showing promising potential as an electrode material in Li-ion batteries.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Materials Science, Ceramics
Menglin Zhang, Xuanru Ren, Mingcheng Zhang, Songsong Wang, Li Wang, Qingqing Yang, Hongao Chu, Peizhong Feng
Summary: The ZrB2-MoSi2 coating prepared by SHS powders exhibits higher density and better oxygen blocking ability, leading to increased oxidation protection efficiency. The rise of MoSi2 content facilitates the dispersion of transition metal oxide nanocrystals, contributing to the inerting impact of the compound glass layer.
JOURNAL OF ADVANCED CERAMICS
(2021)
Article
Materials Science, Multidisciplinary
M. Burgstaller, H. Lund, M. O'Sullivan, H. Huppertz
Summary: The effect of potassium content on the hydrogen reduction of molybdenum trioxide to molybdenum dioxide was studied. It was found that increasing potassium content leads to a decrease in reduction rate, an increase in the fractional content of gamma-Mo4O11 during the reduction process, and an increase in grain size of the resulting MoO2 powder.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2023)
Article
Chemistry, Physical
Pengcheng Zhang, Bo Cai, Yi Feng, Hui Pan, Jianfeng Yao
Summary: The MoO3@MoO2 heterojunction formed on 2D g-C3N4 nanosheets enhances the capacity and cycling performance of lithium-ion batteries by providing abundant active sites and improving charge transport kinetics.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Ceramics
Lu Zhu, Xiaohong Wang, Xuanru Ren, Xueqin Kang, Farid Akhtar, Peizhong Feng
Summary: MoSi2 and MoB were utilized to prepare multilayer MoSi2/MoB coatings on molybdenum by slurry deposition and spark plasma sintering. The coatings exhibited good oxidation resistance at high temperatures, with a dense and complete oxide scale and inhibited oxygen diffusion.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Chemistry, Physical
Ben M. Garland, Neal Fairley, Nicholas C. Strandwitz, Ryan Thorpe, Pascal Bargiela, Jonas Baltrusaitis
Summary: The study presents results from X-ray Photoelectron Spectroscopy (XPS) analysis of molybdenum oxide samples, showing how Mo (VI) oxide evolves to Mo (IV) oxide upon heating. A new method of data processing using sample modification to inform XPS data interpretation is proposed. The study provides insights into the transformations of molybdenum oxide under heat, supporting the interpretation of tetravalent Mo powders as multivalent materials.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Aleksa Kojcinovic, Zan Kovacic, Matej Hus, Blaz Likozar, Miha Grilc
Summary: The valorization of lignocellulosic biomass, specifically the catalytic hydrotreatment of hemicellulose-based furfural, has been studied for the production of value-added chemicals. A three-phase batch reactor was used for the hydrotreatment over various MoOx catalysts, resulting in isopropyl levulinate as the major product. The presence or absence of gaseous H-2 pressure did not contribute significantly to the global reaction rate or selectivity.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Eleonora Pavoni, Mircea Gabriel Modreanu, Elaheh Mohebbi, Davide Mencarelli, Pierluigi Stipa, Emiliano Laudadio, Luca Pierantoni
Summary: In this study, the electronic and optical properties of MoO3 and MoO2 were investigated using Density Functional Theory calculations. The Meta Generalized Gradient Approximation (MGGA) SCAN functional and PseudoDojo pseudopotential were used for the first time to understand the nature of different Mo-O bonds in these materials. The calculated density of states, band structure, and optical properties were validated with experimental results, showing that the proposed theoretical techniques accurately reproduce the properties of both MoO2 and MoO3 systems.
Article
Materials Science, Ceramics
Parvin Imanipour, Saeed Hasani, Amir Seifoddini, Atefeh Farnia, Fatemeh Karimabadi, Khadijeh Jahanbani-Ardakani, Fatemeh Davar
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2020)
Article
Thermodynamics
S. Hasani, Z. Jaafari, A. Seifoddini, P. Rezaei-Shahreza
Summary: The non-isothermal kinetics of nucleation and growth of nano-crystallites in a specific BMG were systematically investigated, revealing that the growth mechanisms of all crystallization stages were controlled by the interface and the nucleation rate increased in the fourth crystallization stage.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Thermodynamics
S. Hasani, P. Rezaei-Shahreza, A. Seifoddini
Summary: In this study, the non-isothermal crystallization kinetic of Fe41Co7Cr15Mo14Y2C15B6 BMG with minor addition of Cu was investigated using DSC technique at different heating rates. It was found that the morphologies of nano-crystallites changed with the addition of Cu, and the activation energies determined showed that Fe-based BMGs have the highest glass-forming ability. Additionally, all stages of the crystallization process of this BMG were controlled by Avrami-Erofeev.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Materials Science, Ceramics
Nastaran Dayani, Ali AmirArjmand, Mohsen Nouri-Khezrabad, Saeed Hasani
Summary: In this study, wet mechanochemical synthesis was used to convert Celestite into SrCO(3) nanopowder, achieving a purity of over 98% without the need for simultaneous heating. The optimal milling time for forming nanopowders with an average particle size of around 90 nm was determined to be 4 hours.
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Javad Alizadeh, Amin Salati, Mohammad Reza Ebrahimi Fordoei, Masoud Panjepour
Summary: The thermodynamics of allotropic transformation in nanocrystalline Fe was studied using molecular dynamics simulation and computational methods to determine Gibbs free energy parameters. The results showed that the allotropic transformation temperature of iron nanocrystal decreases from 900 K to 300 K as the grain size increases.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2021)
Article
Materials Science, Multidisciplinary
Mahmoud Shayestefar, Alireza Mashreghi, Saeed Hasani, Mohammad Taghi Rezvan
Summary: This study optimized critical process parameters in MnFe2O4 doped by Zn and Dy to achieve high magnetic saturation and fine crystallite size. Taguchi method was used to investigate the effects of various factors, with experimental results showing the significant influence of calcination time and Zn content on crystallite size and magnetic saturation, respectively. The sample optimized by the Taguchi method exhibited the highest Ms value.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
M. R. Kamali, A. R. Mashreghi, L. P. Karjalainen, S. Hasani, V Javaheri, M. Seiyedbeigi, J. Komi
Summary: Various contributors have been suggested to explain the variation of mechanical properties of Fe-Co-V magnetic alloys, but a comprehensive understanding is still lacking. The study found that annealing at temperatures between 450 and 550 degrees C led to an increase in hardness and yield strength, but a decrease in elongation. The results showed that the increase in hardness after annealing at these temperatures was likely due to the ordering transition in ferrite in Fe-Co and Fe-Co-2V alloys, while the decrease in yield strength was attributed to factors such as recovery and recrystallization of ferrite and decreasing number of (Co,Fe)(3)V precipitates.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Chemistry, Multidisciplinary
Hossein Elahi Davaji, Fatemeh Shamoradi, Masoud Panjepour, Mehdi Ahmadian
Summary: The study aimed to synthesize and characterize carbon/carbon composites using the CVI process, finding that increasing the process time led to changes in the density, specific surface area, thermal conductivity coefficient, and bending strength of the samples. The SEM images of the fracture surface indicated a weak interface between the carbon fibers and the carbon layer, with the morphology of carbon growth transitioning from laminar to rough-laminar with longer CVI process duration.
Article
Chemistry, Physical
Siavash Aghili, Masoud Panjepour, Mahmood Meratian
Summary: In this study, crystalline metaboric acid powder was dehydrated to boron oxide using thermogravimetry in an argon atmosphere under different heating rates. The kinetic analysis revealed a complex dehydration process with consecutive and parallel regions, each involving different kinetic models. By analyzing the mechanisms in each region separately, the study was able to determine the complex processes based on kinetic results.
REACTION KINETICS MECHANISMS AND CATALYSIS
(2022)
Article
Materials Science, Multidisciplinary
Siavash Aghili, Masoud Panjepour, Mehran Ghiaci
Summary: This study investigated the oxidation process of fullerene using kinetic analysis and found that the kinetic model R-3 is the controlling mechanism of C-60 oxidation. Oxygen and heat played a central role in the deagglomeration of C-60 particles and consequent oxidation.
DIAMOND AND RELATED MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Parvin Imanipour, Saeed Hasani, Amir Seifoddini, Marcin Nabialek
Summary: In this study, cobalt ferrite magnetic nanoparticles doped with zinc and vanadium were synthesized using the sol-gel auto-combustion method. The samples were characterized using various techniques, and the results showed that doping affected the crystal structure, grain size, and morphology of the synthesized particles, as well as the saturation magnetization and coercivity. These findings are of great importance for understanding the physical properties and applications of cobalt ferrite.
Article
Chemistry, Multidisciplinary
Zahra Rafiee, Fatemeh Davar, Saeed Hasani, Ali Majedi, Ahmed Esmail Shalan
Summary: The aqueous reflux method was used to synthesize copper sulfide nanostructures with different morphologies, which showed promising applications in drug release and photocatalytic degradation of dyes. The morphologies and phases of the synthesized copper sulfide nanostructures varied under different conditions.
NEW JOURNAL OF CHEMISTRY
(2021)
Article
Physics, Multidisciplinary
S. Garus, P. Vizureanu, M. M. A. B. Abdullah, M. F. Omarc, S. Walters, S. Hasani, A. Seifoddini, P. Rezaei-Shahreza
Summary: This paper presents research on the magnetic saturation polarization of rapidly-cooled iron alloys with an amorphous structure at different temperatures. The Fe-based amorphous alloys exhibit good magnetic properties and stability, with one Curie temperature related to the amorphous matrix for both tested alloys, indicating effective homogenization. The materials tested followed Heisenberg's theory and used a critical factor to determine the Curie temperature.
ACTA PHYSICA POLONICA A
(2021)
Article
Physics, Multidisciplinary
P. Sikora, M. Nabialek, K. Bloch, J. Gondro, A. Sandu, M. M. A. B. Abdullah, A. Kalwik, P. Mousavi, S. Hasani, B. Jez
Summary: This paper presents indirect structural research on ferromagnetic amorphous alloys, showing that the magnetization process in these alloys is related to the rotation of the magnetization vector around linear defects, as observed in the region approaching ferromagnetic saturation.
ACTA PHYSICA POLONICA A
(2021)
Article
Engineering, Mechanical
Sepide Dabbaghi, Azade Jafarizade, Masoud Panjepour, Mahmood Meratian
Summary: This research used numerical simulations to investigate the impact of structural parameters on fluid flow in metallic foams, finding that porosity variations greatly affect fluid flow while changes in pore diameter do not have a significant effect. The pressure gradient decreases as foam size increases, reaching a specific value and then remaining constant, with porosity variations having no effect on this length but pore diameter changes having a significant impact. A correlation was established to improve the Ergun equation for studying and predicting air flow on a large scale in practical engineering problems.
SPECIAL TOPICS & REVIEWS IN POROUS MEDIA-AN INTERNATIONAL JOURNAL
(2021)