Journal of Alloys and Compounds最新文献

{"title":"Effect of Initial Pre-Aging Conditions on the Isothermal ω-Phase Formation in Metastable Beta Ti-Nb-Zr SMA","authors":"Alexandra Baranova, Sergey Dubinskiy, Oleg Strakhov, Vladimir Cheverikin, Konstantin Lukashevich, Andrey Korotitskiy, Sergey Prokoshkin","doi":"10.1016/j.jallcom.2025.180659","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.180659","url":null,"abstract":"The effect of pre-aging conditions, including initial grain size, residual stress level, and cooling/heating rates prior to isothermal holding on the <em>β</em>→<em>ω</em>_<em>iso</em> transformation is studied in Ti-22Nb-6Zr shape memory alloy, since the formation of the <em>ω</em>-phase significantly impacts functional behavior of this group of alloys. Different thermomechanical treatments to create fine-grained (~5 μm) and coarse-grained (~50 μm) initial microstructures and subsequently, three distinct cooling-heating routes were employed before isothermal aging at 300°C or 375°C were applied. The evolutions of phase and structure states were studied using OM, EBSD, TEM, and XRD. To compare diffusion effects on <em>β</em>→<em>ω</em>_<em>iso</em> transformation, diffusion coefficients and paths were calculated for all alloy components, and to evaluate mechanical properties tensile tests were performed. The \"initial\" stresses formed prior to the ageing process are the most important driving force for the <em>ω</em>_<em>iso</em>-phase precipitation and accelerate the precipitation process dramatically. Therefore, difference in the initial pre-aging conditions leads to the significant difference in the <em>β</em>→<em>ω</em>_<em>iso</em> transformation features. The initial structural state can enhance or suppress the <em>ω</em>_<em>iso</em>-phase formation by the shear mechanism: the fine-grained state has a higher level of residual stresses, which plays a role of “initial” stresses for the <em>ω</em>_<em>iso</em>-phase formation and accelerates the <em>β</em>→<em>ω</em>_<em>iso</em> transformation. The thermal route conditional conditions, such as cooling-heating rates and temperatures, can only accelerate the <em>ω</em>_<em>iso</em>-phase formation by the implementation of diffusion mechanism.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"3 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143878006","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tuning electric polarization via exchange striction interaction in CaMn7O12 by Sr-doping","authors":"A. Nonato ,&nbsp;S. Yáñez-Vilar ,&nbsp;J. Mira ,&nbsp;M.A. Señarís-Rodríguez ,&nbsp;M.Sánchez Andújar ,&nbsp;J. Agostinho Moreira ,&nbsp;A. Almeida ,&nbsp;R.X. Silva ,&nbsp;C.W.A. Paschoal","doi":"10.1016/j.jallcom.2025.180655","DOIUrl":"10.1016/j.jallcom.2025.180655","url":null,"abstract":"<div><div>Magnetoelectric (ME) materials displaying magnetically induced polarization have attracted considerable interest due to their potential applications in spintronics and various fast electrically controlled magnetic devices. CaMn₇O₁₂ (CMO) stands out for its giant spin-induced ferroelectric polarization. However, the origin of the induced electric polarization in CMO remains highly controversial and continues to be a subject of ongoing debate. In this paper through room temperature X-ray powder diffraction (XRPD), temperature-dependent magnetization, and thermally stimulated depolarizing current (TSDC) measurements, we provide experimental evidence for a route to tune the magnetically induced polarization by modifying the exchange-striction in CMO via Sr-doping. Our findings demonstrate that the large and broad current density peaks observed near the first magnetic phase transition (T_N1∼90 K) indicate contributions to the TSDC from both extrinsic dipolar thermally stimulated relaxation processes and intrinsic pyroelectric current, the later arising from magnetically induced polarization changes. We suggest that the reduction in induced electric polarization in CMO originates from an increase in the Mn³ ⁺–O–Mn⁴⁺ bond angle due to Sr²⁺ doping, which weakens the exchange-striction interaction. Meanwhile, the Dzyaloshinskii–Moriya (DM) effect determines the direction of the induced electric polarization. Our result sheds light on understanding the intriguing giant-induced polarization in CMO and similar compounds with complex magnetic structures.</div></div>","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"1028 ","pages":"Article 180655"},"PeriodicalIF":5.8,"publicationDate":"2025-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143878026","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Thermally stabilized interface structure of the θ′-precipitates in heat-resistant AlCu(ScZr) alloys","authors":"J. Yan ,&nbsp;L. Dong ,&nbsp;W.Q. Ming ,&nbsp;Y.W. Gao ,&nbsp;X.Q. Zhao ,&nbsp;C.L. Wu ,&nbsp;J.H. Chen","doi":"10.1016/j.jallcom.2025.180662","DOIUrl":"10.1016/j.jallcom.2025.180662","url":null,"abstract":"<div><div>AlCu alloy series are important and interesting heat-resistant materials widely used in aerospace and automotive industry. Up to date, the heat-resistance mechanisms of the alloys are still controversial. Here, we report a thermally stabilized interface structure of θ′-precipitate and propose a new mechanism by which the Sc element enhance thermal stability of the alloys. By utilizing state-of-the-art electron microscopy and elemental atomic-resolution imaging, it is shown that GP zones and θ′′ precipitates, which form during a preliminary low-temperature aging, do not transform into the θ′-precipitates. Instead, they rapidly dissolve upon subsequent thermal exposure at 300 °C, thereby accelerating the early formation and coarsening of θ′ and θ precipitates, ultimately reducing the heat resistance of alloys. On the contrary, the formation of Sc/θ′/Sc or Al₃Sc/θ′/Al₃Sc composite precipitates in the alloys via a high-temperature aging process results in the thermally stabilization of all interfaces of the strengthening θ′-precipitates, which greatly improve the heat resistance of Al-Cu alloys. There exists either an “in-phase” or an “anti-phase” relationship between the two sideward Al₃Sc layers within these Al₃Sc/θ′/Al₃Sc composite precipitates, which is determined exclusively by the number of Cu-layers in the central θ′-precipitate. This unique interface configuration necessitates the realignment of all Sc atoms in each Sc-containing layer whenever the θ′ precipitate increases in thickness by one Cu-layer. This mechanism effectively inhibits rapid thickening of θ′-precipitates at elevated temperatures. Our findings offer atomic-scale insights into the heat-resistant properties and optimal thermal processing of the alloys.</div></div>","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"1028 ","pages":"Article 180662"},"PeriodicalIF":5.8,"publicationDate":"2025-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143880785","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tailoring physical properties and evaluating photosensing performance of lead sulfide thin films using AACVD","authors":"Aeshah Alasmari ,&nbsp;Bothina Ahmed ,&nbsp;Ayan Mukherjee ,&nbsp;Ahmed A. Aboud","doi":"10.1016/j.jallcom.2025.180549","DOIUrl":"10.1016/j.jallcom.2025.180549","url":null,"abstract":"<div><div>Controlling the deposition temperature is an effective method for tailoring the physical properties of lead sulfide (PbS) thin films, which are essential for photo-sensing devices. In this study, PbS films were deposited using a single-source precursor of lead xanthate via the aerosol-assisted chemical vapor deposition (AACVD) technique. The deposition temperatures were varied at 200, 250, and 300 °C, while all other parameters remained constant. Various diagnostic techniques were employed to analyze the films' properties. Thermogravimetric analysis (TGA) indicated significant weight loss at 131 °C. X-ray diffraction (XRD) confirmed the formation of cubic PbS films in the galena phase, with alignment along the (200) direction across all temperatures. The crystallite size, determined using the Halder-Wagner equation, decreased with increasing temperature. Additionally, the lattice constant decreased as deposition temperature increased, with micro-strain values shifting from 1.03 to -0.93, indicating a transition from tensile to compressive strain. Field emission scanning electron microscopy (FE-SEM) revealed that higher deposition temperatures produced more regular grain shapes, achieving complete cubic morphology at 300 °C. Average grain sizes were estimated to be 161 nm, 250 nm, and 292 nm corresponding to the respective deposition temperatures. Band gap energies measured were 2.24 eV at 200 °C, 2.21 eV at 250 °C, and returning to 2.24 eV at 300 °C. The conductivity type of PbS films transitioned from p-type at 200 °C to n-type at higher temperatures. Activation energies were found to be 0.198 eV, 0.151 eV, and 0.211 eV for films deposited at 200 °C, 250 °C, and 300 °C, respectively. The photo-sensing properties of all films were evaluated at wavelengths of 397.5 nm and 459.5 nm under applied potentials of 0.2 V, 0.4 V, and 0.6 V. The rise time was observed to be within a few seconds, while the decay time was notably longer.</div></div>","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"1028 ","pages":"Article 180549"},"PeriodicalIF":5.8,"publicationDate":"2025-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143878004","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Exploring the supercapacitive and potentiodynamic characteristics of mycologically synthesized ruthenium sulphide nanoparticles","authors":"Sadia Parveen ,&nbsp;Waris ,&nbsp;Mohammad Muaz ,&nbsp;Sk Najrul Islam ,&nbsp;Mohammad Zain Khan ,&nbsp;Manisha Pandey ,&nbsp;Syed Mohd Adnan Naqvi ,&nbsp;Sameena Mehtab ,&nbsp;M.G.H. Zaidi ,&nbsp;Absar Ahmad","doi":"10.1016/j.jallcom.2025.180647","DOIUrl":"10.1016/j.jallcom.2025.180647","url":null,"abstract":"<div><div>Transition metal dichalcogenides (TMDs) have recently attracted significant attention as electrode materials for electrochemical energy storage devices. In alignment with the growing emphasis on green approaches, we report, for the first time, the synthesis of ruthenium sulphide nanoparticles (RuS₂ NPs) using a fungal-mediated production method involving the endophytic fungus <em>Fusarium oxysporum</em>. The synthesis was carried out at neutral pH, ambient temperature, and pressure, aligning with the key principles of green synthesis. The optical, structural, morphological, and electrochemical properties of the RuS₂ NPs were investigated using various analytical techniques. Electrochemically active working electrodes (WEs) with enhanced anticorrosive properties, electrical conductivity, and hydrophobicity were fabricated by coating RuS₂ NPs onto carbon fabric-supported aluminium substrates, serving as current collectors. The WEs exhibited a specific capacitance (Cₛ) of 97.52 F g⁻¹ at a current density of 0.1 A g⁻¹ in 0.1 M H₂SO₄, with a capacitive retention of 90.5 % after 2000 charge-discharge cycles. Potentiodynamic polarization studies at 5 mV s⁻¹ , supported by scanning electron microscopy, revealed notable anticorrosive behaviour of the WEs, with controlled delamination at a rate of 0.16 mm/yr after 48 hours of immersion in 0.1 M H₂SO₄. These experimental results confirm the potential of <em>Fusarium oxysporum</em> as a promising fungal candidate for developing a novel, green, and sustainable method for synthesizing electrochemically active RuS₂ NPs for corrosion-resistant supercapacitor electrodes.</div></div>","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"1028 ","pages":"Article 180647"},"PeriodicalIF":5.8,"publicationDate":"2025-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143878029","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"One-Dimensional Multicomponent Nanofibers Engineered as Heterostructures for Electromagnetic Stealth Applications","authors":"Xiyao Wang, Jiao Liu, Xukang Han, Ao Deng, Bowen Han, Yihan Jin, Di Lan, Mingliang Ma, Yang Li","doi":"10.1016/j.jallcom.2025.180631","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.180631","url":null,"abstract":"The development of advanced antenna systems capable of simultaneously achieving electromagnetic stealth and high-efficiency power transmission is recognized as a critical technological frontier. In this study, the challenge is addressed through the rational design and fabrication of Co/MnO₂/C heterostructured nanofibers, which are prepared via electrospinning followed by controlled carbonization. Through deliberate component selection and meticulous microstructure engineering, impedance matching and attenuation characteristics are synergistically optimized. Exceptional electromagnetic wave (EMW) absorption performance is demonstrated by the resulting architecture, as evidenced by an outstanding minimum reflection loss (RLₘᵢₙ) of -71.88<!-- --> <!-- -->dB at 7.5<!-- --> <!-- -->GHz and a broad effective absorption bandwidth (EAB) of 5.3<!-- --> <!-- -->GHz at an ultrathin thickness of merely 1.57<!-- --> <!-- -->mm. Superior radar stealth capability is further confirmed through comprehensive radar cross-section (RCS) simulations. More importantly, when employed as a dielectric layer in patch antenna configurations, excellent signal transmission efficiency is maintained by the Co/MnO₂/C nanofibers while effective electromagnetic absorption is simultaneously provided. These findings not only present a high-performance EMW absorber with multifunctional capabilities, but also establish a materials design paradigm that could be utilized to propel the development of next-generation intelligent antenna systems and other advanced electromagnetic devices.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"3 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143877890","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Interplay of valence and oxygen vacancy formation energy towards oxidation response of γ-TiAl alloyed with Group V and Period V refractory elements","authors":"Shivansh Mehrotra,&nbsp;Sangeeta Santra","doi":"10.1016/j.jallcom.2025.180603","DOIUrl":"10.1016/j.jallcom.2025.180603","url":null,"abstract":"<div><div>Oxidation response of Group V (V, Nb and Ta) and Period V (Zr, Nb and Mo) refractory metals alloyed γ-TiAl phase has been studied at 1000 °C in air. Growth of oxide zones involve two regimes, linear and parabolic for all the alloys except for the Ta-alloyed one where the initial segment had a growth exponent of 1.5 followed by the parabolic behavior. An external oxide zone develops for all the alloys comprising of three distinctive layers: (i) innermost (Al₂O₃ dominantly) (ii) intermediate (Al₂O₃ + TiO₂) and (iii) outermost (TiO₂ + small pockets of Al₂O₃). Tiny amounts of refractory based oxides of Nb₂O₅, Ta₂O₅, ZrO₂ and MoO₂ also formed for the respective alloyed γ-TiAl. An internal oxide region of (Al₂O₃ + Ti₃Al) developed in the case of binary γ-TiAl and Nb-alloyed, while (Ti, Zr) complex oxides had formed in the Zr alloyed γ-TiAl. Mo- and Ta-alloyed γ-TiAl produced no internal oxide layer, but segregation of Mo and Ta was observed at the alloy/oxide interface. Group V elements had good solubility in TiO₂ and oxidation resistance of the alloys increased down the group in the sequence of Ta &gt; Nb &gt; V. While a sequence of Nb &gt; Mo &gt; Zr was observed for the Period V elements with no specific trend. The Ta-alloyed γ-TiAl exhibited the highest oxidation resistance because of an increase in the vacancy formation energy of oxygen in TiO₂. The oxygen vacancy formation energy of TiO₂ was concluded to be the most crucial factor governing the oxidation resistance of alloyed γ-TiAl phase.</div></div>","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"1027 ","pages":"Article 180603"},"PeriodicalIF":5.8,"publicationDate":"2025-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143877936","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ni-doping V2O5@NC nanoflowers for oxygen evolution in electrolyzed water","authors":"Wenyao Xue ,&nbsp;Hongliang Fu ,&nbsp;Guanjie Xue ,&nbsp;Jing Zhao ,&nbsp;Yue Lian ,&nbsp;Zhifeng Wang ,&nbsp;Yongfeng Hu ,&nbsp;Huaihao Zhang","doi":"10.1016/j.jallcom.2025.180640","DOIUrl":"10.1016/j.jallcom.2025.180640","url":null,"abstract":"<div><div>The oxygen evolution reaction (OER), a half-process of water electrolysis, involves four electron transfer processes with a high energy barrier, leading to slow reaction kinetics. Developing stable and high-efficiency OER electrocatalysts remains a major challenge in field of water electrolysis. Here, a novel Ni-doping V₂O₅@NC nanoflower-like catalyst is synthesized for OER reaction. Specifically, Ni-V₂O₅@NC is obtained by incorporating Ni into V₂O₅ through a simply hydrothermal- carbonization process, using NH₄VO₃, Ni(NO₃)₂·6 H₂O and H₂C₂O₄·₂H₂O as raw materials. This approach can improve the OER activity and stability of V₂O₅. Ni-V₂O₅@NC presents the following advantages. Firstly, Ni-doping combined with nanoflower structure improves the reaction activity. Ni-doping generates more electrochemical active sites, facilitating the adsorption/desorption process of reaction intermediates and electron transfer, thereby enhancing catalytic activity. Besides, the nanoflower-like structure provides a relatively high specific surface area and more active sites to participate in the reaction, thus boosting the catalytic reactivity. Secondly, Ni with high conductivity and its doping into V₂O₅ causes structural and performance changes of material, reducing the charge transfer resistance and optimizing the conductive property. Meanwhile, the inherent N and C from hydrothermal reaction also increase material conductivity. Also, Ni doping inhibits the stacking of V₂O₅ lamellar structure while maintaining the catalyst’s activity, structural integrity and the improved stability. The electrochemical analysis results show Ni-V₂O₅@NC good electrochemical performance. Ni-60-V₂O₅@NC features a low overpotential (300 mV@10 mA cm⁻²) and a small Tafel slope (74.2 mV dec⁻¹) in OER. Additionally, the overpotential of Ni-60-V₂O₅@NC only increases by 3 mV after 1000 cycles stability tests.</div></div>","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"1027 ","pages":"Article 180640"},"PeriodicalIF":5.8,"publicationDate":"2025-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143877942","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Cu-MOF and its multi-walled carbon nano tube composite for the effective catalytic and electrocatalytic hydrogenation of 4-nitrophenol","authors":"Aathilingam Vijayaprabhakaran ,&nbsp;Christy Sebastian ,&nbsp;Veeramuthu Saravanakumar ,&nbsp;Iyyathurai Vigneshwar ,&nbsp;Ravichandran Balaji ,&nbsp;Murugavel Kathiresan ,&nbsp;Vembu Suryanarayanan","doi":"10.1016/j.jallcom.2025.180645","DOIUrl":"10.1016/j.jallcom.2025.180645","url":null,"abstract":"<div><div>A new and promising low-cost composite catalyst based on environmentally friendly multi-walled carbon nanotubes (CNTs) with highly active copper (Cu) containing MOF was developed for the chemical and electrochemical conversion of environmental pollutants such as 4-nitrophenol (4-NP) into beneficial 4-aminophenol (4-AP). Although Cu-MOF by itself has outstanding catalytic activity for converting 4-NP to 4-AP, the electrocatalytic performance is improved and the electrocatalyst's conductivity and durability are increased when CNTs are integrated with pristine Cu-MOF in electrochemical nitrophenol reduction. This integrated composite demonstrates exceptional prospects for the electrochemical transformation of 4-NP to 4-AP, one of the key intermediates in the synthesis of paracetamol. The electrochemical process achieves a remarkable 98 % conversion with 86 % yield efficiency. Simultaneously, 4-NP was chemically reduced using the composite catalyst in the presence of excess NaBH₄. The Cu-MOF catalyst has shown exceptional catalytic activity, converting 4-NP to 4-AP in a brief time of 72 seconds, whereas its CNT composite showed reduced activity. Further, the synthesized 4-AP is converted to paracetamol through an acetylation reaction with acetic anhydride, yielding a product of 60 % with a purity of 88 %, and NMR, GC-MS, and FT-IR spectroscopy confirmed the product. This work presents a novel approach for the conversion of pollutants without the generation of secondary pollutants or the need for sacrificial agents, offering a sustainable and efficient solution for industrial applications.</div></div>","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"1028 ","pages":"Article 180645"},"PeriodicalIF":5.8,"publicationDate":"2025-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143877940","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Alloy-like Fe-Mn oxides with notable magnetic properties and catalytic performance for H2O2 activation: Insights into electron effect and improved stability","authors":"Qiang Bi,&nbsp;Yue Du,&nbsp;Ying Xue,&nbsp;Kun Zhang,&nbsp;Juanqin Xue","doi":"10.1016/j.jallcom.2025.180657","DOIUrl":"10.1016/j.jallcom.2025.180657","url":null,"abstract":"<div><div>The preparation of highly efficient and easily recoverable Fenton catalysts for removing refractory pollutants is challenging. Herein, a novel magnetic alloy-like oxide catalyst with abundant unsaturated centres and the low valence states was successfully designed by high-temperature solid phase modulation. The prepared material is characterized by its ability to inhibit the self-decomposition of the Fe-MOFs in water and overcome the recycling limitations of traditional catalysts. The effects of various synthesis parameters, including calcination temperature, on the catalytic properties of the MOF derivatives were investigated. The optimized FM800/H₂O₂ system exhibited remarkable catalytic performance, achieving 90 % degradation of the 20 mg/L tetracycline solution within 10 min and approximately 100 % degradation within 60 min. The material retained efficient degradation activity and reusability across a pH range of 5–11, with Mn leaching rates below 0.01 mg/L. Theoretical calculations demonstrated that bimetallation lowers the band gap between the d-band center and the Fermi energy level, facilitating low-valent metals generation and H₂O₂ activation. This study provides valuable insights into the design of high-performance multiphase catalysts and underscores the promising potential of stable MOFs derivatives in wastewater treatment.</div></div>","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"1028 ","pages":"Article 180657"},"PeriodicalIF":5.8,"publicationDate":"2025-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143877888","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}