Pub Date : 2026-01-14DOI: 10.1016/j.jallcom.2026.186210
Alaa Hammoud , Usman Iliyasu , B. Alshahrani , Jamila S. Alzahrani , M.S. Al-Buriahi
Three borate glass of composition: 70B2O3 – 5Li2O – 11BaO –5SrO – 5 K2O – (4-x-y)Pbo – (x)Eu2O3 – (y)Tb2O3, where x + y = 0, 2, and 4 mol.% were synthesized via the melt-quench techniques. The density of the prepared specimens was enhanced from 3.015 to 3.134 g/cm3 with the replacement of PbO with Eu2O3 – Tb2O3 at the maximum level. Their optical band gap obtained at room temperature demonstrated a decreasing pattern from 4.065 to 3.918 eV with a corresponding increase in refractive index from 2.158 to 2.345, and higher reflection loss increased from 31.1 % to 37.39 % with (2)Eu2O3 – (2)Tb2O3 replacing (4)PbO. The non-linear optical susceptibility (χ3) and non-linear refractive decrease from 3.78 to 2.08 esu and 6.62 to 3.35 esu, respectively, potentially reducing the risk of optical breakdown. Excitation at 365 nm, the Tb3+ ions in the borate glass absorb ultraviolet light and partially emit green light at a lower activator level, while predominantly transferring their energy to Eu3+ ions. The Eu3+ ions thereafter exhibit distinct strong red peaks, particularly the hypersensitive ⁵D₀→⁷F₂ transition at higher activator levels. The reduction of non-linear effects demonstrates enhanced glass stability, accompanied by a diminished non-linear refractive index, which minimizes signal distortion and enhances data transmission quality, rendering the glasses suitable for use in optical communication systems. A direct comparison was made with a lead-based reference glass of similar composition. The results confirm that our lead-free glass exhibits a lower density, a broader UV transparency window, and a significantly higher quantum yield with more efficient energy transfer, underscoring the dual benefit of its eco-friendly design and enhanced performance
{"title":"Influence of rare earth metals (Eu2O3 – Tb2O3) co-doping on the physical, optical, and photoluminescence behavior of multi-elemental borate glasses","authors":"Alaa Hammoud , Usman Iliyasu , B. Alshahrani , Jamila S. Alzahrani , M.S. Al-Buriahi","doi":"10.1016/j.jallcom.2026.186210","DOIUrl":"10.1016/j.jallcom.2026.186210","url":null,"abstract":"<div><div>Three borate glass of composition: 70B<sub>2</sub>O<sub>3</sub> – 5Li<sub>2</sub>O – 11BaO –5SrO – 5 K<sub>2</sub>O – (4-<em>x</em>-<em>y</em>)Pbo – (<em>x</em>)Eu<sub>2</sub>O<sub>3</sub> – (y)Tb<sub>2</sub>O<sub>3</sub>, where <em>x</em> + <em>y</em> = 0, 2, and 4 mol.% were synthesized via the melt-quench techniques. The density of the prepared specimens was enhanced from 3.015 to 3.134 g/cm<sup>3</sup> with the replacement of PbO with Eu<sub>2</sub>O<sub>3</sub> – Tb<sub>2</sub>O<sub>3</sub> at the maximum level. Their optical band gap obtained at room temperature demonstrated a decreasing pattern from 4.065 to 3.918 eV with a corresponding increase in refractive index from 2.158 to 2.345, and higher reflection loss increased from 31.1 % to 37.39 % with (2)Eu<sub>2</sub>O<sub>3</sub> – (2)Tb<sub>2</sub>O<sub>3</sub> replacing (4)PbO. The non-linear optical susceptibility (χ<sup>3</sup>) and non-linear refractive <span><math><mrow><msub><mrow><mo>(</mo><mi>n</mi></mrow><mrow><mn>2</mn></mrow></msub><mo>)</mo></mrow></math></span> decrease from 3.78<span><math><mrow><mo>×</mo><mspace></mspace><msup><mrow><mn>10</mn></mrow><mrow><mo>−</mo><mn>15</mn></mrow></msup></mrow></math></span> to 2.08 <span><math><mrow><mo>×</mo><mspace></mspace><msup><mrow><mn>10</mn></mrow><mrow><mo>−</mo><mn>15</mn></mrow></msup></mrow></math></span> esu and 6.62<span><math><mrow><mo>×</mo><msup><mrow><mn>10</mn></mrow><mrow><mo>−</mo><mn>14</mn></mrow></msup></mrow></math></span> to 3.35<span><math><mrow><mo>×</mo><msup><mrow><mn>10</mn></mrow><mrow><mo>−</mo><mn>14</mn></mrow></msup></mrow></math></span> esu, respectively, potentially reducing the risk of optical breakdown. Excitation at 365 nm, the Tb<sup>3+</sup> ions in the borate glass absorb ultraviolet light and partially emit green light at a lower activator level, while predominantly transferring their energy to Eu<sup>3+</sup> ions. The Eu<sup>3+</sup> ions thereafter exhibit distinct strong red peaks, particularly the hypersensitive ⁵D₀→⁷F₂ transition at higher activator levels. The reduction of non-linear effects demonstrates enhanced glass stability, accompanied by a diminished non-linear refractive index, which minimizes signal distortion and enhances data transmission quality, rendering the glasses suitable for use in optical communication systems. A direct comparison was made with a lead-based reference glass of similar composition. The results confirm that our lead-free glass exhibits a lower density, a broader UV transparency window, and a significantly higher quantum yield with more efficient energy transfer, underscoring the dual benefit of its eco-friendly design and enhanced performance</div></div>","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"1053 ","pages":"Article 186210"},"PeriodicalIF":6.3,"publicationDate":"2026-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145962534","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}
Pub Date : 2026-01-14DOI: 10.1016/j.jallcom.2026.186237
Angelo Oñate , Juan Pablo Sanhueza , Diego Wackerling , Carlos Lanziotti , David Rojas , Víctor Tuninetti , Abdul Herrim Seidou
The development of multicomponent alloys for cryogenic applications requires reliable prediction of phase stability to ensure adequate toughness at low temperatures. This is critical to address the embrittlement phenomenon observed in conventional alloys under cryogenic conditions, as in the case of austenitic stainless steels such as 304 L and 316 L, which suffer toughness degradation due to the formation of martensitic (α′) phase. In this context, the present work focused on the development of a complex concentrated alloy (CCA) based on the FeCrNiCuTiVC system, fabricated by induction melting under an argon-controlled atmosphere, using primarily recycled stainless steel and ferroalloys as raw materials. The alloy design was carried out through an integrated approach combining machine learning techniques (Random Forest and XGBoost) trained on a robust database of 2591 records, together with thermodynamic predictions via CALPHAD using the TCHEA6 database. The resulting alloy exhibited an austenitic matrix with fine-scale precipitate-like features and the formation of σ phase. Tensile tests revealed an elongation of ∼82 % and a strength–ductility product (PSE) of 40.1 GPa·%, evidencing high damage tolerance. Nanoindentation and microhardness results indicated that the σ-phase precipitates do not exert a significant macroscopic effect in this alloy, which accounts for its remarkable deformability. Furthermore, nanoindentation tests revealed pop-in events characteristic of twinning, suggesting the activation of a twinning-induced plasticity (TWIP) mechanism. This was evidenced by SPM analyses of the nanoindentation imprint and by FE-SEM observations in the post-fracture sample. Similarly, fine-grained regions were identified in the area adjacent to the fracture, originating from subgrain formation caused by the severe dislocation interactions within the material. This explains the high ductility observed and validates the pronounced strain-hardening behavior of the alloy. Finally, Charpy impact tests demonstrated energy absorption of 205 J/cm² at room temperature and 226 J/cm² at 77 K, indicating not only excellent toughness at cryogenic temperatures but also the absence of a ductile-to-brittle transition, even in the presence of intermetallic phases. This behavior is attributed to the synergy between the TWIP mechanism and nanoprecipitates, both of which enhance the mechanical response and suppress premature embrittlement potentially induced by the σ phase, given its reduced fraction in the microstructure.
{"title":"Low-cost austenitic complex concentrated alloy with deformation-induced plasticity and nanoprecipitate as a strategy to enhance energy absorption at cryogenic temperature: Computational modeling and experimental validation","authors":"Angelo Oñate , Juan Pablo Sanhueza , Diego Wackerling , Carlos Lanziotti , David Rojas , Víctor Tuninetti , Abdul Herrim Seidou","doi":"10.1016/j.jallcom.2026.186237","DOIUrl":"10.1016/j.jallcom.2026.186237","url":null,"abstract":"<div><div>The development of multicomponent alloys for cryogenic applications requires reliable prediction of phase stability to ensure adequate toughness at low temperatures. This is critical to address the embrittlement phenomenon observed in conventional alloys under cryogenic conditions, as in the case of austenitic stainless steels such as 304 L and 316 L, which suffer toughness degradation due to the formation of martensitic (α′) phase. In this context, the present work focused on the development of a complex concentrated alloy (CCA) based on the FeCrNiCuTiVC system, fabricated by induction melting under an argon-controlled atmosphere, using primarily recycled stainless steel and ferroalloys as raw materials. The alloy design was carried out through an integrated approach combining machine learning techniques (Random Forest and XGBoost) trained on a robust database of 2591 records, together with thermodynamic predictions via CALPHAD using the TCHEA6 database. The resulting alloy exhibited an austenitic matrix with fine-scale precipitate-like features and the formation of σ phase. Tensile tests revealed an elongation of ∼82 % and a strength–ductility product (PSE) of 40.1 GPa·%, evidencing high damage tolerance. Nanoindentation and microhardness results indicated that the σ-phase precipitates do not exert a significant macroscopic effect in this alloy, which accounts for its remarkable deformability. Furthermore, nanoindentation tests revealed pop-in events characteristic of twinning, suggesting the activation of a twinning-induced plasticity (TWIP) mechanism. This was evidenced by SPM analyses of the nanoindentation imprint and by FE-SEM observations in the post-fracture sample. Similarly, fine-grained regions were identified in the area adjacent to the fracture, originating from subgrain formation caused by the severe dislocation interactions within the material. This explains the high ductility observed and validates the pronounced strain-hardening behavior of the alloy. Finally, Charpy impact tests demonstrated energy absorption of 205 J/cm² at room temperature and 226 J/cm² at 77 K, indicating not only excellent toughness at cryogenic temperatures but also the absence of a ductile-to-brittle transition, even in the presence of intermetallic phases. This behavior is attributed to the synergy between the TWIP mechanism and nanoprecipitates, both of which enhance the mechanical response and suppress premature embrittlement potentially induced by the σ phase, given its reduced fraction in the microstructure.</div></div>","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"1053 ","pages":"Article 186237"},"PeriodicalIF":6.3,"publicationDate":"2026-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145975855","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}
As a novel energy-harvesting and storage device, photo-assisted supercapacitors integrate the photovoltaic conversion capability of solar cells with the energy storage characteristics of supercapacitors. In this study, we fabricated needle-like CuCo2O4 (CCO) loaded with CdS nanoparticles on nickel foam (NF) as a photo-assisted supercapacitor electrode by using hydrothermal method and successive ionic layer adsorption and reaction (SILAR) technique. The specific capacitance of the CCO@CdS-1/NF composite electrode outperformed that of single-component electrodes and other composite electrodes with different deposition cycles, and the specific capacitance of the composite electrode increased from 1535.7 to 1715.0 mF/cm2 after light illumination at a current density of 5 mA/cm2. Moreover, the CCO@CdS-1/NF electrode exhibited a higher photocurrent than the other electrodes. The excellent performance of the composite electrode is attributed to its distinct hierarchical structure and the construction of Type-II heterojunctions. The unique structure not only augmented the number of active sites—thereby optimizing the material’s light-harvesting ability—but also efficiently separated the photogenerated electron-hole pairs. Additionally, the asymmetric photo-assisted supercapacitor with CCO@CdS-1/NF as the positive electrode achieved a high areal energy density of 0.16 mWh/cm2 under illumination and a photo-enhancement efficiency of up to 111.3 % at 10 mA/cm2. The research successfully endows the device with photo-enhanced energy storage properties, thus laying a foundation for the development of innovative, high-efficiency photo-energy storage systems.
{"title":"Heterojunction consisting of CuCo2O4 nanoneedles decorated with CdS nanoparticles for high-performance photo-assisted supercapacitors","authors":"Heng Zhang , Sushuang Feng , Weilong Li, Haifeng Tan, Chenrui Fan, Yijie Gao, Xue Yang, Zhaoyu Ren","doi":"10.1016/j.jallcom.2026.186222","DOIUrl":"10.1016/j.jallcom.2026.186222","url":null,"abstract":"<div><div>As a novel energy-harvesting and storage device, photo-assisted supercapacitors integrate the photovoltaic conversion capability of solar cells with the energy storage characteristics of supercapacitors. In this study, we fabricated needle-like CuCo<sub>2</sub>O<sub>4</sub> (CCO) loaded with CdS nanoparticles on nickel foam (NF) as a photo-assisted supercapacitor electrode by using hydrothermal method and successive ionic layer adsorption and reaction (SILAR) technique. The specific capacitance of the CCO@CdS-1/NF composite electrode outperformed that of single-component electrodes and other composite electrodes with different deposition cycles, and the specific capacitance of the composite electrode increased from 1535.7 to 1715.0 mF/cm<sup>2</sup> after light illumination at a current density of 5 mA/cm<sup>2</sup>. Moreover, the CCO@CdS-1/NF electrode exhibited a higher photocurrent than the other electrodes. The excellent performance of the composite electrode is attributed to its distinct hierarchical structure and the construction of Type-II heterojunctions. The unique structure not only augmented the number of active sites—thereby optimizing the material’s light-harvesting ability—but also efficiently separated the photogenerated electron-hole pairs. Additionally, the asymmetric photo-assisted supercapacitor with CCO@CdS-1/NF as the positive electrode achieved a high areal energy density of 0.16 mWh/cm<sup>2</sup> under illumination and a photo-enhancement efficiency of up to 111.3 % at 10 mA/cm<sup>2</sup>. The research successfully endows the device with photo-enhanced energy storage properties, thus laying a foundation for the development of innovative, high-efficiency photo-energy storage systems.</div></div>","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"1053 ","pages":"Article 186222"},"PeriodicalIF":6.3,"publicationDate":"2026-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145976073","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}
Pub Date : 2026-01-14DOI: 10.1016/j.jallcom.2026.186179
Ruixue Bu, Yandong Ma, Hongyang Zeng, Maowen Xu
{"title":"Self-Assembled Zincophilic Sn-Bi Alloy Interfacial Layer for Stable Zinc Metal Anodes","authors":"Ruixue Bu, Yandong Ma, Hongyang Zeng, Maowen Xu","doi":"10.1016/j.jallcom.2026.186179","DOIUrl":"https://doi.org/10.1016/j.jallcom.2026.186179","url":null,"abstract":"","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"265 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2026-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145962464","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}
Pub Date : 2026-01-14DOI: 10.1016/j.jallcom.2025.185926
Hugues Nkomba Museba, BongJu Lee
{"title":"Scaling Up Plasma-Derived Metallic Nanoalloys: A Comprehensive Review of Production Bottlenecks, Manufacturing Readiness, and AI-Driven Pathways to Viability","authors":"Hugues Nkomba Museba, BongJu Lee","doi":"10.1016/j.jallcom.2025.185926","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.185926","url":null,"abstract":"","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"26 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2026-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145962532","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}
Pub Date : 2026-01-14DOI: 10.1016/j.jallcom.2026.186206
Buddhika S.A. Gedara, Mi Yeon Byun, Maria L. Sushko, Bojana Ginovska, Zdenek Dohnalek, Tom Autrey, Peter S. Rice, Zbynek Novotny
{"title":"The presence of Ru metal modifies the behavior of deuterium bound to pyridinic nitrogen in nitrogen-doped graphene-like materials","authors":"Buddhika S.A. Gedara, Mi Yeon Byun, Maria L. Sushko, Bojana Ginovska, Zdenek Dohnalek, Tom Autrey, Peter S. Rice, Zbynek Novotny","doi":"10.1016/j.jallcom.2026.186206","DOIUrl":"https://doi.org/10.1016/j.jallcom.2026.186206","url":null,"abstract":"","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"46 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2026-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145961812","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}
Pub Date : 2026-01-14DOI: 10.1016/j.jallcom.2026.186165
Jingjing Liu , Dongbao Luo , Jun Xu
This research introduces a straightforward solution-precipitation technique for the fabrication of silicon-based heterostructures white light-emitting diode (WLED) incorporating erbium-doped zinc oxide nanorods-nanoholes (ZnO:Er NRs-NHs) arrays. Photoluminescence (PL) characterization reveals that the combined effects of Er³ ⁺ doping and the NRs-NHs architecture synergistically enhance the near-band-edge (NBE) emission intensity by a factor of 32 and the defect-level emission (DLE) by a factor of 25 compared to conventional ZnO films. These enhancements are attributed to improved crystallinity, an increased density of surface defects, and a significant reduction in reflectance to below 10 %. Electroluminescence (EL) measurements demonstrate broad visible emission spanning 380–800 nm. Notably, the ZnO:Er NRs-NHs/p-Si LED exhibits a remarkably low turn-on voltage of less than 4 V and achieves a higher emission intensity by a factor of 11 at 8 V relative to LEDs based on ZnO films. Chromaticity coordinates (x = 0.29, y = 0.33) confirm efficient white light emission closely approximating the ideal white point. These findings establish the proposed heterostructures as promising candidates for low-voltage white-light sources.
{"title":"White light-emitting diode from ordered Er³ ⁺ doped ZnO nanorods-nanoholes arrays/p-Si heterostructures","authors":"Jingjing Liu , Dongbao Luo , Jun Xu","doi":"10.1016/j.jallcom.2026.186165","DOIUrl":"10.1016/j.jallcom.2026.186165","url":null,"abstract":"<div><div>This research introduces a straightforward solution-precipitation technique for the fabrication of silicon-based heterostructures white light-emitting diode (WLED) incorporating erbium-doped zinc oxide nanorods-nanoholes (ZnO:Er NRs-NHs) arrays. Photoluminescence (PL) characterization reveals that the combined effects of Er³ ⁺ doping and the NRs-NHs architecture synergistically enhance the near-band-edge (NBE) emission intensity by a factor of 32 and the defect-level emission (DLE) by a factor of 25 compared to conventional ZnO films. These enhancements are attributed to improved crystallinity, an increased density of surface defects, and a significant reduction in reflectance to below 10 %. Electroluminescence (EL) measurements demonstrate broad visible emission spanning 380–800 nm. Notably, the ZnO:Er NRs-NHs/p-Si LED exhibits a remarkably low turn-on voltage of less than 4 V and achieves a higher emission intensity by a factor of 11 at 8 V relative to LEDs based on ZnO films. Chromaticity coordinates (x = 0.29, y = 0.33) confirm efficient white light emission closely approximating the ideal white point. These findings establish the proposed heterostructures as promising candidates for low-voltage white-light sources.</div></div>","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"1053 ","pages":"Article 186165"},"PeriodicalIF":6.3,"publicationDate":"2026-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145975938","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}
Pub Date : 2026-01-14DOI: 10.1016/j.jallcom.2026.186211
Haicheng Liu, Wenhao Zhang, Chuang Zhang, Shuwen Wang
The rapid recombination of photogenerated charge carriers is a major challenge for photocatalysts. In this study, a novel Z-scheme heterojunction photocatalyst was synthesized via a hydrothermal method by coupling bimetallic Ce/Zr-NH2-UiO-66 (CNU) with solid solution of BiOCl0.7I0.3 (Bi-0.3) for ciprofloxacin (CIP) degradation. The catalyst combines the excellent charge separation ability of Ce/Zr bimetallic metal organic framework (MOF) with the broad light absorption of solid solution of bismuth oxyhalide, achieving outstanding photocatalytic performance under visible light. The characterization results demonstrate that the formation of the Z-scheme heterojunction significantly enhances the material's visible light absorption and promotes efficient electron-hole separation through the built-in electric field, thereby effectively suppressing the recombination of photogenerated charge carriers. Photoelectrochemical and radical trapping experiments further demonstrated excellent interfacial charge transfer and reactivity. The catalyst achieved a CIP removal efficiency of 90.06 ± 2.78 % within 90 min and exhibited good stability in various water matrices. The response surface methodology analyzed the interactions between key reaction parameters, while density functional theory (DFT) confirmed that the electron transfer mechanism follows a Z-scheme heterojunction. It also predicted the degradation pathway of CIP and identified the primary attack sites, along with evaluating the environmental toxicity of the intermediate products. This study provided new insights into the design of bimetallic MOF-based Z-scheme heterojunction and expands the application potential of photocatalysts for environmental remediation.
{"title":"Bismuth oxyhalide modified bimetallic Ce/Zr-MOF to construct Z-scheme heterojunction for enhanced visible light photocatalytic degradation of typical antibiotics","authors":"Haicheng Liu, Wenhao Zhang, Chuang Zhang, Shuwen Wang","doi":"10.1016/j.jallcom.2026.186211","DOIUrl":"10.1016/j.jallcom.2026.186211","url":null,"abstract":"<div><div>The rapid recombination of photogenerated charge carriers is a major challenge for photocatalysts. In this study, a novel Z-scheme heterojunction photocatalyst was synthesized via a hydrothermal method by coupling bimetallic Ce/Zr-NH<sub>2</sub>-UiO-66 (CNU) with solid solution of BiOCl<sub>0.7</sub>I<sub>0.3</sub> (Bi-0.3) for ciprofloxacin (CIP) degradation. The catalyst combines the excellent charge separation ability of Ce/Zr bimetallic metal organic framework (MOF) with the broad light absorption of solid solution of bismuth oxyhalide, achieving outstanding photocatalytic performance under visible light. The characterization results demonstrate that the formation of the Z-scheme heterojunction significantly enhances the material's visible light absorption and promotes efficient electron-hole separation through the built-in electric field, thereby effectively suppressing the recombination of photogenerated charge carriers. Photoelectrochemical and radical trapping experiments further demonstrated excellent interfacial charge transfer and reactivity. The catalyst achieved a CIP removal efficiency of 90.06 ± 2.78 % within 90 min and exhibited good stability in various water matrices. The response surface methodology analyzed the interactions between key reaction parameters, while density functional theory (DFT) confirmed that the electron transfer mechanism follows a Z-scheme heterojunction. It also predicted the degradation pathway of CIP and identified the primary attack sites, along with evaluating the environmental toxicity of the intermediate products. This study provided new insights into the design of bimetallic MOF-based Z-scheme heterojunction and expands the application potential of photocatalysts for environmental remediation.</div></div>","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"1053 ","pages":"Article 186211"},"PeriodicalIF":6.3,"publicationDate":"2026-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145961811","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}
Pub Date : 2026-01-14DOI: 10.1016/j.jallcom.2026.186141
Yinwen Mao, Hangyu Yue, Xinying Xu, Hongwu Gao
In this work, single-track experiments were conducted using laser-directed energy deposition to fabricate Fe28.0Co29.5Ni27.5Al8.5Ti6.5 high-entropy alloy. The microstructural morphology of single-track deposits was investigated under different laser powers, and finite element modeling was employed to simulate the temperature field. The results showed that under a laser power of 1200 W, the melt pool cross-section was divided into three distinct regions: planar grains at the bottom, columnar grains in the middle, and equiaxed grains at the top. The cross-section of single-track exhibited mainly planar grains at the bottom and columnar grains at the top, with no observable equiaxed grains at the top when the laser power increased to 1500 W. Numerical simulations revealed that the temperature gradient (G) decreased gradually from the bottom to the top of the melt pool, while the solidification rate (R) enhanced, and the ratio of temperature gradient to solidification rate also decreased. The relationship between the G/R and microstructural morphology was elucidated. This work provides a theoretical basis for predicting the microstructure of deposited HEAs based on the solidification diagram, thereby guiding the production of components with controllable microstructure and mechanical properties.
{"title":"Columnar-to-equiaxed grain transition in Fe28.0Co29.5Ni27.5Al8.5Ti6.5 high-entropy alloy prepared via directed energy deposition","authors":"Yinwen Mao, Hangyu Yue, Xinying Xu, Hongwu Gao","doi":"10.1016/j.jallcom.2026.186141","DOIUrl":"10.1016/j.jallcom.2026.186141","url":null,"abstract":"<div><div>In this work, single-track experiments were conducted using laser-directed energy deposition to fabricate Fe<sub>28.0</sub>Co<sub>29.5</sub>Ni<sub>27.5</sub>Al<sub>8.5</sub>Ti<sub>6.5</sub> high-entropy alloy. The microstructural morphology of single-track deposits was investigated under different laser powers, and finite element modeling was employed to simulate the temperature field. The results showed that under a laser power of 1200 W, the melt pool cross-section was divided into three distinct regions: planar grains at the bottom, columnar grains in the middle, and equiaxed grains at the top. The cross-section of single-track exhibited mainly planar grains at the bottom and columnar grains at the top, with no observable equiaxed grains at the top when the laser power increased to 1500 W. Numerical simulations revealed that the temperature gradient (<em>G</em>) decreased gradually from the bottom to the top of the melt pool, while the solidification rate (<em>R</em>) enhanced, and the ratio of temperature gradient to solidification rate also decreased. The relationship between the <em>G/R</em> and microstructural morphology was elucidated. This work provides a theoretical basis for predicting the microstructure of deposited HEAs based on the solidification diagram, thereby guiding the production of components with controllable microstructure and mechanical properties.</div></div>","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"1053 ","pages":"Article 186141"},"PeriodicalIF":6.3,"publicationDate":"2026-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145976010","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}
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