Journal of Alloys and Compounds最新文献_第8页

New fluorite-like lanthanum-europium molybdates with Nd5Mo3O16+δ-type structure

IF 5.8 2区材料科学

Journal of Alloys and Compounds Pub Date : 2025-03-31 DOI: 10.1016/j.jallcom.2025.180138

Tatiana S. Berezhnaya, Konstantin A. Chebyshev, Roman V. Kabanov

{"title":"New fluorite-like lanthanum-europium molybdates with Nd5Mo3O16+δ-type structure","authors":"Tatiana S. Berezhnaya, Konstantin A. Chebyshev, Roman V. Kabanov","doi":"10.1016/j.jallcom.2025.180138","DOIUrl":"10.1016/j.jallcom.2025.180138","url":null,"abstract":"<div><div>Phase relations in the La2O3 – Eu2O3 – MoO3 ternary system were studied using polycrystalline samples obtained in air at 1250°C via solid-state reaction of metal oxides. The system contains a broad region of a cubic fluorite-like phase of lanthanum-europium molybdates, named LEMO, which is isostructural with Nd5Mo3O16+δ. However, the homogeneity range of this phase is quite limited and occurs at a lower MoO₃ content compared to neodymium molybdate. The citrate method was applied for the synthesis of LEMO ceramic samples with a relative density of 98 %. The crystal structure of La2.5Eu2.5Mo2.625O15.75 was analyzed by the Rietveld refinement using powder XRD data. The analysis revealed structural features of this europium-containing fluorite-like molybdate, specifically the splitting of oxygen atomic positions in the octahedral voids within the fluorite structure. The fluorite-like molybdate samples exhibited high electrical conductivity, with the grain bulk contribution at about 10−2 S/cm at 900°C, and intense red luminescence under near-UV and blue radiation.</div></div>","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"1023 ","pages":"Article 180138"},"PeriodicalIF":5.8,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143747593","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}

引用次数: 0

Dual Z-scheme black phosphorus quantum dots (BPQDs)/ Cu2O crystalline/amorphous Ti, Fe-layered double hydroxides (LDH) heterojunction construction with enhanced electron transfer property for photocatalytic nitrogen fixation

IF 6.2 2区材料科学

Journal of Alloys and Compounds Pub Date : 2025-03-31 DOI: 10.1016/j.jallcom.2025.180135

Wanquan Ma, Yuan Yu, Yanning Qu, Dongfeng Sun, Huayun Du, Lei Zhang, Linyin Huang, Shihu Lei, Qingmei Su, Beibei Lou, Min Zhang, Xinyue Wei, Bingshe Xu

{"title":"Dual Z-scheme black phosphorus quantum dots (BPQDs)/ Cu2O crystalline/amorphous Ti, Fe-layered double hydroxides (LDH) heterojunction construction with enhanced electron transfer property for photocatalytic nitrogen fixation","authors":"Wanquan Ma, Yuan Yu, Yanning Qu, Dongfeng Sun, Huayun Du, Lei Zhang, Linyin Huang, Shihu Lei, Qingmei Su, Beibei Lou, Min Zhang, Xinyue Wei, Bingshe Xu","doi":"10.1016/j.jallcom.2025.180135","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.180135","url":null,"abstract":"Photocatalytic nitrogen (N2) reduction efficiency of the catalysts can be enhanced through Z-scheme heterojunctions. However, challenges related to electron transfer efficiency and interactions within these systems remained to be addressed. In this study, a dual Z-scheme heterojunction composed of black phosphorus quantum dot (BPQDs)/Cu2O crystalline/amorphous Ti, Fe-layered double hydroxides (LDH) heterojunction (BPCTF) was successfully synthesized for photocatalytic N2 reduction. The dual Z-scheme heterojunction significantly enhanced charge separation efficiency, and the crystalline/amorphous structure broadened electron transport pathways, thereby enhancing photocatalytic activity. The synthesized BPCTF catalyst achieved a photocatalytic N2 reduction rate of 47.316 µ mol/g/h, corresponding to 5.12-, 2.14-, and 1.16-fold enhancements compared to Cu2O, Ti, Fe-LDH, and Cu2O/Ti, Fe-LDH, respectively. This work advanced the mechanistic understanding of dual Z-scheme photocatalysts by elucidating synergistic contributions from free radical dynamics and intrinsic electric fields, providing valuable insights into the electron transfer processes for photocatalytic N2 reduction.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"28 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143758003","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}

引用次数: 0

Study on precipitation and corrosion behavior of Al-1.0Mg-0.6Si(-0.3Cu) alloys by Sn addition modification

IF 6.2 2区材料科学

Journal of Alloys and Compounds Pub Date : 2025-03-31 DOI: 10.1016/j.jallcom.2025.180120

Wenbin Tu, Jianguo Tang, Fengkai Lu, Lehang Ma, Shanlin Wang, Yuhua Chen, Xin Zhan, Pian Xu

引用次数: 0

Simple and Scalable Solid-State Synthesis of ZnMn3O4-g-C3N4 Heterostructures for Enhanced Photoelectrochemical Water Splitting

IF 6.2 2区材料科学

Journal of Alloys and Compounds Pub Date : 2025-03-31 DOI: 10.1016/j.jallcom.2025.180094

G. Sreenivasa Kumar, N.Ch. Ramgopal, N. Ramesh Reddy, A. Sai Kumar, Durga Prasad Pabba, Asma A. Alothman, Saikh Mohammad, Jae Hak Jung, Sang Woo Joo

{"title":"Simple and Scalable Solid-State Synthesis of ZnMn3O4-g-C3N4 Heterostructures for Enhanced Photoelectrochemical Water Splitting","authors":"G. Sreenivasa Kumar, N.Ch. Ramgopal, N. Ramesh Reddy, A. Sai Kumar, Durga Prasad Pabba, Asma A. Alothman, Saikh Mohammad, Jae Hak Jung, Sang Woo Joo","doi":"10.1016/j.jallcom.2025.180094","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.180094","url":null,"abstract":"This study presents a novel solid-state one-pot synthesis method for fabricating a ZnMn3O4-g-C3N4 heterostructure composite, designed to enhance the efficiency of photoelectrochemical (PEC) water splitting. The synergistic integration of ZnMn3O4 and graphitic carbon nitride (g-C3N4) enhances light absorption and charge separation, resulting in a significant improvement in photocatalytic performance. Compared to its individual ZnMn3O4 and g-C3N4 counterparts, the ZnMn3O4-g-C3N4 composite demonstrates markedly superior PEC water-splitting efficiency. Linear sweep voltammetry reveals a substantial increase in photocurrent density, reaching 0.18 mA/cm² versus Ag/AgCl under light exposure. Moreover, the ZnMn3O4-g-C3N4 heterostructure exhibits outstanding stability and enhanced photoconversion efficiency over extended operational periods. The facile and scalable synthesis method further highlights its practicality for large-scale production of high-performance composite materials. Beyond showcasing the potential of the ZnMn3O4-g-C3N4 heterostructure for PEC water splitting, this work opens new avenues for the design and development of advanced composite materials in renewable energy applications. The significant advancements presented in this study have the potential to contribute to the broader adoption of sustainable energy solutions.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"15 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143736889","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}

引用次数: 0

Accuracy control of ZrO2 ceramic with microporous structure based on 3D printing

IF 6.2 2区材料科学

Journal of Alloys and Compounds Pub Date : 2025-03-31 DOI: 10.1016/j.jallcom.2025.180130

Xingyao Sun, Jinkai Xu, Yuzhen Zhang, Shan Li, Bingshan Liu, Gong Wang, Wenyan Duan

引用次数: 0

Anomalous strengthening in a low-temperature aged FeMnCoCrN high entropy alloy: Role of local chemical order

IF 6.2 2区材料科学

Journal of Alloys and Compounds Pub Date : 2025-03-31 DOI: 10.1016/j.jallcom.2025.180091

Lifang Sun, Zhufeng He, Shuang Jiang, Xinyu Wang, Jintao Zhao, Yuliang Yang, Ye Yuan, Yunjie Li, Nan Jia

引用次数: 0

Tuning electrochemical performance with copper hexahydroxytriphenylene framework and nickel cobaltite anode for asymmetric supercapacitors

IF 6.2 2区材料科学

Journal of Alloys and Compounds Pub Date : 2025-03-31 DOI: 10.1016/j.jallcom.2025.180126

Azhar Saeed, Md Rezaul Karim, Haseebul Hassan, Junaid Ahmad Khan, Abdullatif Hakami, Mohamed Musa Saad Hasb, Muhammad Waqas Iqbal

{"title":"Tuning electrochemical performance with copper hexahydroxytriphenylene framework and nickel cobaltite anode for asymmetric supercapacitors","authors":"Azhar Saeed, Md Rezaul Karim, Haseebul Hassan, Junaid Ahmad Khan, Abdullatif Hakami, Mohamed Musa Saad Hasb, Muhammad Waqas Iqbal","doi":"10.1016/j.jallcom.2025.180126","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.180126","url":null,"abstract":"Two dimensional conductive metal organic frameworks (2D MOFs), a class of porous materials with high functionality and porosity, offer exceptional potential for energy stowing devices as they offer abundant active sites, expansive surface areas, and rapid ion transport. But, the strategic investigation of 2D MOFs for the innovative field of supercapacitors (SCs) using superior electric properties and electrochemical activity remains largely untapped. This study introduces a novel 2D conductive ultrathin copper-hexahydroxytriphenylene (Cu3(HHTP)2) film composite with nickel cobaltite (NiCo2O4) which was then applied on a nickel foam substrate to develop conductive electrode using a conventional coating method. The interrelated conductive frameworks exhibit a remarkable combination of low interior resistance, swift electrolyte ion diffusion, and rapid electron transfer. With a specific capacity of 1622 C/g, Cu3(HHTP)2/NiCo2O4 demonstrate exceptional electrochemical performance. The corresponding asymmetrical SCs with Cu3(HHTP)2/NiCo2O4 and activated carbon (AC) showed an energy density of 70.12 Wh/kg alongside 840 W/kg power density. Cu3(HHTP)2/NiCo2O4//AC also exhibits remarkable performance, with a specific capacity of 295 C/g at a current density of 1.3 A/g and a high capacity retention of 91% after 7000 cycles.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"96 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143736876","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}

引用次数: 0

New insights on how metal clusters in MIL-68-NH2 influence the photocatalytic nitrogen fixation

IF 6.2 2区材料科学

Journal of Alloys and Compounds Pub Date : 2025-03-31 DOI: 10.1016/j.jallcom.2025.180123

Qiufan Sun, Yuxiang Zhu, Yan Wang, Zhengtao Jia, Xiang Zhong, Jianfeng Yao

{"title":"New insights on how metal clusters in MIL-68-NH2 influence the photocatalytic nitrogen fixation","authors":"Qiufan Sun, Yuxiang Zhu, Yan Wang, Zhengtao Jia, Xiang Zhong, Jianfeng Yao","doi":"10.1016/j.jallcom.2025.180123","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.180123","url":null,"abstract":"Three isostructural MIL-68(M)-NH2 frameworks (M = In, Fe, or Al) featuring different metal centers were synthesized to investigate their photocatalytic activities for nitrogen fixation. The influence of the metal<img alt=\"single bond\" src=\"https://sdfestaticassets-us-east-1.sciencedirectassets.com/shared-assets/55/entities/sbnd.gif\" style=\"vertical-align:middle\"/>oxo clusters on the crystalline structures, morphologies, and optical characteristics was examined. MIL-68(In)-NH2 (MNI) with one-dimensional microrod structures has a larger surface area than bulk MIL-68(Fe)-NH2 (MNF) and spherical MIL-68(Al)-NH2 (MNA), and achieves an ammonia generation rate (140.34 μmol gcat-1 h-1) ca. 3.4 and 1.6 times higher than those of MNF (37.25 μmol gcat-1 h-1) and MNA (87.5 μmol gcat-1 h-1), respectively. The superior performance can be attributed to its high crystallinity, strong coordination between the In−oxo clusters and ligands, and microrod morphology, which enhance electron transfer, improve mass transport, and extend visible light absorption. Moreover, MNI shows greater stability in ethanol aqueous solution than other sacrificial reagents, such as methanol, potassium sulfite, and triethanolamine. While slight surface corrosion of the microrods occurs in methanol and potassium sulfite solutions, complete collapse is observed in triethanolamine.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"18 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143736890","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}

引用次数: 0

Crystal structure, thermal stability and photoelectric performance of the organic-inorganic hybrid material [(CH3CH2CH2)2NH2]aBibXc (X = Cl, Br and I)

IF 6.2 2区材料科学

Journal of Alloys and Compounds Pub Date : 2025-03-31 DOI: 10.1016/j.jallcom.2025.180131

Shuang Chen, Qiule Zhao, Yangchun Mo, Xiaopeng Wei, Jilin Wang, Guoyuan Zheng, Fei Long

{"title":"Crystal structure, thermal stability and photoelectric performance of the organic-inorganic hybrid material [(CH3CH2CH2)2NH2]aBibXc (X = Cl, Br and I)","authors":"Shuang Chen, Qiule Zhao, Yangchun Mo, Xiaopeng Wei, Jilin Wang, Guoyuan Zheng, Fei Long","doi":"10.1016/j.jallcom.2025.180131","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.180131","url":null,"abstract":"Organic-inorganic hybrid perovskites have attracted wide attention because of their low cost, high photoelectric conversion efficiency and simple production process. Diisopropylamine was innovatively employed, in this paper, as the A-site organic ligand for bismuth-based halide organic-inorganic hybrid crystals. [(CH3CH2CH2)2NH2]aBibXc (X = Cl, Br and I) crystals were synthesized by a solvent evaporation method. All three crystals belong to the P21/n space group. Among them, [(CH3CH2CH2)2NH2]BiBr4 and [(CH3CH2CH2)2NH2]BiI4 have one-dimensional chain structures, and [(CH3CH2CH2)2NH2]2Bi2Cl8 belongs to a zero-dimensional structure. The band gap can be adjusted between 3.04 eV and 1.61 eV by the properties of halide ligands, and the good thermal stability of the three crystals are 203°C, 258°C and 291°C. Moreover, [(CH3CH2CH2)2NH2]BiI4 thin films were prepared by the one-step solution spin-coating as a light absorbing layer. The band gap of thin films is 1.97 eV. The maximum power conversion efficiency of the device is 0.0271%. Therefore, this organic-inorganic hybrid compound with a suitable band gap and high stability is expected to become a potential candidate material for photoelectric devices.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"11 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143736892","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}

引用次数: 0

Quantifying strengthening mechanisms and strength-elongation relationship in annealed pure Al wires

IF 6.2 2区材料科学

Journal of Alloys and Compounds Pub Date : 2025-03-31 DOI: 10.1016/j.jallcom.2025.180100

Yingjie Wu, Yanning Zhang, Junliang Lin, Jiehua Liu, Chenxi Deng, Peng Dang, Xichuan Cai, Qiang Wang

{"title":"Quantifying strengthening mechanisms and strength-elongation relationship in annealed pure Al wires","authors":"Yingjie Wu, Yanning Zhang, Junliang Lin, Jiehua Liu, Chenxi Deng, Peng Dang, Xichuan Cai, Qiang Wang","doi":"10.1016/j.jallcom.2025.180100","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.180100","url":null,"abstract":"Pure Al wires used for overhead transmission lines undergo continuous microstructural and mechanical property evolution due to long-term thermal service, yet the quantitative relationship between these changes remains unclear. In this study, isothermal annealing treatments (90-250°C) were performed to simulate the thermal service conditions of pure Al wire, followed by comprehensive mechanical and microstructural characterization. The results demonstrate that as the annealing temperature increases to 250°C, the yield strength and the ultimate tensile strength of the as-received pure Al wires significantly decrease from 200.4 MPa and 207.4 MPa to 72.5 MPa and 97.6 MPa, respectively, while uniform elongation increases from 2.0% to 12.6%, demonstrating a typical strength-elongation trade-off. Quantitative analysis of the strengthening mechanisms reveals that grain boundary strengthening remains dominant in both as-received and annealed pure Al wires, while dislocation and texture strengthening decrease significantly after annealing at 90°C and disappear entirely at 250°C. Moreover, a quantitative model for the strength-elongation relationship was developed based on work hardening models, demonstrating good agreement with experimental data and providing new insights for predicting the performance of pure Al wires under thermal service conditions.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"36 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143736945","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}

引用次数: 0