IF 3.9 2区材料科学

Vacuum Pub Date : 2025-09-26 DOI: 10.1016/j.vacuum.2025.114780

Jiajia Ye , Zizhong Chen , Zifan Wang , Li Han , Mingyuan Pang , Zhen Kong , Juan An , Zheng Li , Guang Xia

{"title":"P-doped CoSe2/FeSe2 heterojunction nanoparticles anchored on foam-like carbon skeleton as an ultrafast and stable sodium-ion storage anode","authors":"Jiajia Ye , Zizhong Chen , Zifan Wang , Li Han , Mingyuan Pang , Zhen Kong , Juan An , Zheng Li , Guang Xia","doi":"10.1016/j.vacuum.2025.114780","DOIUrl":"10.1016/j.vacuum.2025.114780","url":null,"abstract":"<div><div>P-doped CoSe<sub>2</sub>/FeSe<sub>2</sub> heterojunction nanoparticles (2–10 nm) anchored on a three-dimensional porous foam-like carbon network were synthesized <em>via</em> a direct pyrolysis-blowing strategy followed by phosphorization/selenization process. This carbon network serves as a continuous pathway for electron conduction, enhances specific surface area, and alleviates electrode volume expansion during cycling. Specifically, P-doping further improves the electrical conductivity of CoSe<sub>2</sub>/FeSe<sub>2</sub> nanoparticles, significantly accelerating electrochemical kinetics and enabling high specific capacities at elevated current densities. Benefiting from the unique nanostructure and atomic-level P-doping, the P-CoSe<sub>2</sub>/FeSe<sub>2</sub>(2:1)/C anode delivers prominent cycling stability (210.9 mAh g<sup>−1</sup> after 2000 cycles at 2000 mA g<sup>−1</sup>) and exceptional rate capability (323.5 mAh g<sup>−1</sup> at 5000 mA g<sup>−1</sup>). This work demonstrates that combining heterojunction engineering with heteroatom doping is an effective strategy to enhance the long-term cycling stability of sodium-ion battery anodes.</div></div>","PeriodicalId":23559,"journal":{"name":"Vacuum","volume":"242 ","pages":"Article 114780"},"PeriodicalIF":3.9,"publicationDate":"2025-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145220700","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

Preparation of metallic lead from complex lead-antimony sulfide ores by continuous vacuum distillation 连续真空蒸馏从复杂的铅锑硫化矿石中制备金属铅

IF 3.9 2区材料科学

Vacuum Pub Date : 2025-09-26 DOI: 10.1016/j.vacuum.2025.114773

Yifan Shi , Qianfang Yan , Jinyang Zhao , Baoqiang Xu , Zhaowang Dong , Hao Li , Jiyao Wang , Bin Yang , Heng Xiong

引用次数: 0

Design and optimization of an O-ring retainer and dovetail groove for vacuum seals 真空密封用o形圈固定器和燕尾槽的设计与优化

IF 3.9 2区材料科学

Vacuum Pub Date : 2025-09-26 DOI: 10.1016/j.vacuum.2025.114776

Hongsheng Yang, Xinhua Zhu, Ming Yuan, Zuoxing Li, Lin Feng, Liping Rao, Caiwei Pang, Ting Li, An-An Fang, Zhiqiang Chen, Xiaojun Zhang

引用次数: 0

Investigation of the growth of nickel oxide films using atomic layer deposition of NiCp2 and O3 for electrochromic applications 电致变色用NiCp2和O3原子层沉积制备氧化镍薄膜的研究

IF 3.9 2区材料科学

Vacuum Pub Date : 2025-09-25 DOI: 10.1016/j.vacuum.2025.114774

Ilya Ezhov , Ivan Gorbov , Pavel Vishniakov , Vladislav Chernyavsky , Denis Olkhovskii , Denis Nazarov , Lev Markov , Irina Smirnova , Rajesh Kumar , Maxim Maximov

{"title":"Investigation of the growth of nickel oxide films using atomic layer deposition of NiCp2 and O3 for electrochromic applications","authors":"Ilya Ezhov , Ivan Gorbov , Pavel Vishniakov , Vladislav Chernyavsky , Denis Olkhovskii , Denis Nazarov , Lev Markov , Irina Smirnova , Rajesh Kumar , Maxim Maximov","doi":"10.1016/j.vacuum.2025.114774","DOIUrl":"10.1016/j.vacuum.2025.114774","url":null,"abstract":"<div><div>The development of smart electrochromic windows capable of adjusting the transmission of optical radiation has the potential to reduce peak energy consumption for the cooling and heating of buildings. Nevertheless, this technology still requires further development and the implementation of new approaches to mass production. For this purpose, a novel approach to obtain electrochromic material by the atomic layer deposition (ALD) method has been demonstrated in this research. This study explores the ALD method for NiO synthesis using bis(cyclopentadienyl) nickel (II) and ozone by comparing two evaporator types: “Bubbler” and “Vapor.” The “Bubbler type” showed better performance, with a growth rate of 0.025 nm/cycle (0.019 nm/cycle for “Vapor type”) and lower non-uniformity (19 %) at 250 °C. Optimal deposition occurred between 225 and 275 °C, yielding a stable growth rate of 0.024–0.025 nm/cycle. The films consisted mainly of NiO crystals (<em>Fm3m</em>) with traces of Ni(OH)<sub>2</sub>/NiOOH. A 15 nm thick NiO layer on porous ITO demonstrated promising electrochromic properties: 37 % transmittance modulation, 42.6 cm<sup>2</sup>/C colouring efficiency, and response times of 3.6 s (colouring) and 5.4 s (bleaching). These results highlight the potential for scalable ALD-based production of high-performance electrochromic materials.</div></div>","PeriodicalId":23559,"journal":{"name":"Vacuum","volume":"242 ","pages":"Article 114774"},"PeriodicalIF":3.9,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145220702","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

The enhanced thermal stability of single element Sb phase-change materials by rare earth 稀土对单元素Sb相变材料热稳定性的增强

IF 3.9 2区材料科学

Vacuum Pub Date : 2025-09-25 DOI: 10.1016/j.vacuum.2025.114752

Zhongwang Song , Weifeng Gu , Yinxuan Ni , Guoxiang Wang

{"title":"The enhanced thermal stability of single element Sb phase-change materials by rare earth","authors":"Zhongwang Song , Weifeng Gu , Yinxuan Ni , Guoxiang Wang","doi":"10.1016/j.vacuum.2025.114752","DOIUrl":"10.1016/j.vacuum.2025.114752","url":null,"abstract":"<div><div>Sb-based single-element phase-change memory exhibits exceptional potential for next-generation phase-change memory (PCM) applications, owing to its fast phase transition capability and remarkably low resistance drift coefficient. However, it is significantly hindered by its inadequate thermal stability, making it susceptible to spontaneous crystallization at ambient temperature. This research details the production of Sb-Yb composite films utilizing magnetron sputtering techniques, along with an in-depth analysis of their crystallization processes. The Sb-based composite film exhibits high crystallization temperature (120 °C), the Growth-dominated crystallization mode (n<sub>avg</sub> = 0.96), low resistance drift (0.015), and enhanced optical bandgap (0.91 eV). These advancements are attributed to a unique crystalline-amorphous nanocomposite structure, where Sb nanograins (10–20 nm) are encapsulated by an amorphous Sb-Yb phase. The amorphous Yb-Sb matrix refines grain size and suppresses excessive growth of Sb nanograins, thereby significantly enhancing the structural thermal stability. This nanocomposite architecture significantly enhances thermal stability in Sb-based PCMs while exhibiting extremely low resistance drift and maintaining the growth-type crystallization mechanism, effectively overcoming the limitations of pure Sb and traditional Ge<sub>2</sub>Sb<sub>2</sub>Te<sub>5</sub> (GST) materials.</div></div>","PeriodicalId":23559,"journal":{"name":"Vacuum","volume":"242 ","pages":"Article 114752"},"PeriodicalIF":3.9,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145158518","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

Effect of Ti content on the microstructure and wear performance in vacuum of Ti-Ag/MoS2 composite films Ti含量对Ti- ag /MoS2复合膜微观结构及真空磨损性能的影响

IF 3.9 2区材料科学

Vacuum Pub Date : 2025-09-25 DOI: 10.1016/j.vacuum.2025.114765

Xingguo Feng, Hong Hao, Yugang Zheng, Lamaocao Yang, Keliang Wang, Kaifeng Zhang, Hui Zhou

{"title":"Effect of Ti content on the microstructure and wear performance in vacuum of Ti-Ag/MoS2 composite films","authors":"Xingguo Feng, Hong Hao, Yugang Zheng, Lamaocao Yang, Keliang Wang, Kaifeng Zhang, Hui Zhou","doi":"10.1016/j.vacuum.2025.114765","DOIUrl":"10.1016/j.vacuum.2025.114765","url":null,"abstract":"<div><div>Molybdenum disulfide (MoS<sub>2</sub>) films have emerged as a critical material in space lubrication systems, but the escalating operational demands for high-load capacity and extended service durability in spacecraft mechanisms necessitate substantial enhancement of MoS<sub>2</sub>-based coatings. To address this challenge, the Ti-Ag/MoS<sub>2</sub> composite films were prepared by unbalanced magnetron sputtering technology. Comprehensive characterization using advanced analytical techniques including FESEM, HRTEM, and XRD revealed that titanium doping induces a structural transformation in Ag/MoS<sub>2</sub> coatings, promoting the formation of a dense amorphous structure. Notably, the crystalline ordering exhibited an inverse correlation with titanium concentration. The friction and wear properties of Ti-Ag/MoS<sub>2</sub> films were evaluated in vacuum under combined high loads and rotational speed. It is confirmed that MoS<sub>2</sub> films binary-doped with Ti and Ag had a significant improvement in friction and wear properties; the optimized Ti (12.8 at%)-Ag/MoS<sub>2</sub> film achieved an ultra-low steady-state friction coefficient of 0.01 and wear rate of 6.0 × 10<sup>−8</sup> mm<sup>3</sup>/N m. In practical bearing applications, the Ti (12.8 at%)-Ag/MoS<sub>2</sub> coated components demonstrated a 29 % reduction in average friction torque and a 35 % decrease in torque fluctuation amplitude compared to Ag/MoS<sub>2</sub> counterparts. These results confirm that the ternary doping strategy successfully reconciles the inherent conflict between friction reduction and wear resistance.</div></div>","PeriodicalId":23559,"journal":{"name":"Vacuum","volume":"242 ","pages":"Article 114765"},"PeriodicalIF":3.9,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145158517","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

Microstructure evolution and enhanced mechanical performance of CrAlN and CrAlON coatings subjected to exposure in tropical marine environment 热带海洋环境下CrAlN和CrAlON涂层的微观结构演变及力学性能增强

IF 3.9 2区材料科学

Vacuum Pub Date : 2025-09-25 DOI: 10.1016/j.vacuum.2025.114777

Dongpo Xu , Wenhao Zhao , Dali Du , Zhenrong Gao , Na Wang , Zhen Cao , Jinlong Li

{"title":"Microstructure evolution and enhanced mechanical performance of CrAlN and CrAlON coatings subjected to exposure in tropical marine environment","authors":"Dongpo Xu , Wenhao Zhao , Dali Du , Zhenrong Gao , Na Wang , Zhen Cao , Jinlong Li","doi":"10.1016/j.vacuum.2025.114777","DOIUrl":"10.1016/j.vacuum.2025.114777","url":null,"abstract":"<div><div>CrAlN and CrAlON coatings were deposited on high-strength bolts by multi-arc ion plating. The coated bolts were subjected to one year of natural exposure in a tropical marine environment. After one year of exposure in a tropical marine environment, the CrAlN coating exhibits extensive corrosion pits and pronounced grain boundary cracks. In contrast, the CrAlON coating demonstrates superior corrosion resistance, characterized by a dense surface morphology, refined grains, and the absence of observable cracks. These microstructural characteristics inhibit the ingress of corrosive species and confer environmental adaptability on the CrAlON coating. Furthermore, the CrAlON coating retains high hardness and elevated H/E (0.082) and H<sup>3</sup>/E*<sup>2</sup> (0.208) values, indicating superior load-bearing capacity. Its wear rate decreases from 18.43 × 10<sup>−7</sup> mm<sup>3</sup> N<sup>−1</sup> m<sup>−1</sup> to 9.98 × 10<sup>−7</sup> mm<sup>3</sup> N<sup>−1</sup> m<sup>−1</sup> after exposure, reflecting outstanding wear resistance. These findings provide important insights into the development of durable, multifunctional coatings for high-strength bolts in tropical marine environment.</div></div>","PeriodicalId":23559,"journal":{"name":"Vacuum","volume":"242 ","pages":"Article 114777"},"PeriodicalIF":3.9,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145220706","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

Fabrication of Ti3AlC2/Cu composites via vacuum infiltration and their tribological properties 真空浸渗法制备Ti3AlC2/Cu复合材料及其摩擦学性能

IF 3.9 2区材料科学

Vacuum Pub Date : 2025-09-24 DOI: 10.1016/j.vacuum.2025.114772

Wenjie Zhu , Wenkang Liu , Hua Tan , Junsheng Yang

{"title":"Fabrication of Ti3AlC2/Cu composites via vacuum infiltration and their tribological properties","authors":"Wenjie Zhu , Wenkang Liu , Hua Tan , Junsheng Yang","doi":"10.1016/j.vacuum.2025.114772","DOIUrl":"10.1016/j.vacuum.2025.114772","url":null,"abstract":"<div><div>Titanium dihydride powder, aluminum powder, and carbon powder were selected as raw materials and uniformly mixed in an atomic ratio of 3:1.2:2. To the mixed powder, 20 wt% stearic acid was added, and Ti<sub>3</sub>AlC<sub>2</sub> porous ceramics were prepared by vacuum sintering using the powder metallurgy method. Ti<sub>3</sub>AlC<sub>2</sub>/Cu composite materials were fabricated using porous Ti<sub>3</sub>AlC<sub>2</sub> ceramics as the matrix and copper (Cu) as an infiltrant, with infiltration coefficient of Ti<sub>3</sub>AlC<sub>2</sub> to Cu incrementally increasing from 1:1 to 1:2 using vacuum infiltration. The phase composition, surface morphology, elemental distribution, and microstructure of the composite materials were analyzed using testing methods such as X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDS), and metallographic microscopy. The differences in tribological properties of composite materials with gradually increasing infiltration coefficient of Ti<sub>3</sub>AlC<sub>2</sub> to Cu from 1:1 to 1:2 were examined, along with the friction and wear mechanisms of the composite materials during the friction process. The results revealed that under loads of 5 N, 10 N, 15 N, and 20 N, the friction coefficient of the composite material exhibited a characteristic trend of first decreasing and then increasing with rising copper phase content. With a load of 20 N and an infiltration coefficient of Ti<sub>3</sub>AlC<sub>2</sub> to Cu of 1:1.5, the composite material exhibits optimal wear resistance, characterized by a coefficient of friction of 0.21 ± 0.01 and a wear volume of (2.25 ± 0.12) × 10<sup>−5</sup> mm<sup>3</sup> m<sup>−1</sup>.</div></div>","PeriodicalId":23559,"journal":{"name":"Vacuum","volume":"242 ","pages":"Article 114772"},"PeriodicalIF":3.9,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145220704","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

Enhanced peroxymonosulfate activation by ZIF-67/Bi/Ti@NF bimetallic system for efficient antibiotic degradation ZIF-67/Bi/Ti@NF双金属体系增强过氧单硫酸盐活化高效降解抗生素

IF 3.9 2区材料科学

Vacuum Pub Date : 2025-09-24 DOI: 10.1016/j.vacuum.2025.114775

Faiza Shahzad , Chen Lin , Zhu Liang , Rana Mohsin Ali , Hamza Khaliq , Ghulam Abbas Ashraf , Muhammad Aziz Abid , Zeshan Javed , Mukhtorjon Karimov

{"title":"Enhanced peroxymonosulfate activation by ZIF-67/Bi/Ti@NF bimetallic system for efficient antibiotic degradation","authors":"Faiza Shahzad , Chen Lin , Zhu Liang , Rana Mohsin Ali , Hamza Khaliq , Ghulam Abbas Ashraf , Muhammad Aziz Abid , Zeshan Javed , Mukhtorjon Karimov","doi":"10.1016/j.vacuum.2025.114775","DOIUrl":"10.1016/j.vacuum.2025.114775","url":null,"abstract":"<div><div>Rising demand of tetracycline (TC) has triggered the contamination of aquatic systems, posing severe health risks. Consequently, there is a necessity to discover techniques to eradicate TC. Recently, advanced oxidation processes (AOPs) utilizing radical pathways have potentially executed the antibiotic removal. Therefore, there is an immediate need to develop materials that can simultaneously detect and effectively eliminate TC. Recent applications of AOPs utilizing SO<sub>4</sub><sup>•</sup><sup>−</sup>have effectively targeted the removal of antibiotics. This study involved the fabrication of an effective catalyst composed of ZIF-67 and bimetals (bismuth and titanium) by a hydrothermal technique on nickel foam (ZIF-67/Bi/Ti@NF). The determinants affecting ZIF-67/Bi/Ti@NF activated peroxymonosulfate (PMS) were examined. The structure of catalyst was characterized using SEM, TEM, XRD, XPS etc providing critical insights into its morphology, crystallinity. Improved TC degradation was recorded with ZIF-67/Bi/Ti@NF activated PMS without any external energy source. Under optimal conditions (ZIF-67:Bi:Ti ratio of 3:2:1, PMS dosage of 0.02 g/L, pH = 6.71), ZIF-67/Bi/Ti@NF achieved a TC removal rate of 99.4 % from an initial concentration of 10 mg/L within 10 min with a rate constant (k) of 0.187 min<sup>−1</sup>. The degradation proceeded via a multi-radical pathway involving SO<sub>4</sub><sup>•</sup><sup>-</sup>, <sup>•</sup>OH, and O<sub>2</sub><sup>•</sup><sup>-</sup> as dominant reactive species. Until 4th cycle of usage, the catalyst showed satisfactory degradation. This system not only degraded TC, but also showed efficient removal of other emerging pollutants like carbamazepine, I buprofen, naproxen highlighting its broad-spectrum applicability and potential as an innovative catalyst for aquatic environmental remediation.</div></div>","PeriodicalId":23559,"journal":{"name":"Vacuum","volume":"242 ","pages":"Article 114775"},"PeriodicalIF":3.9,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145220705","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

Ultrafast photonic qPCR system based on 2D photothermal black phosphorus for African Swine Fever virus (ASFV) detection 基于二维光热黑磷的超快光子qPCR检测非洲猪瘟病毒

IF 3.9 2区材料科学

Vacuum Pub Date : 2025-09-23 DOI: 10.1016/j.vacuum.2025.114771

Zhixian Liang , Shiping Zhou , Weikang Xu, Shaohui Zhang

引用次数: 0

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