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Laser ablation synthesis of BiOCl/Ag/WO₃nanocomposite to evaluate its photocatalysis performance

Modern Physics Letters B 2025年第4期39卷

作者： Lin, Kai-Siang Furube, Akihiro Katayama, Testuro Koinkar, Pankaj Wu, Chang Mou Institute of Post-LED Photonics And Graduate School of Science and Technology for Innovation Tokushima University Tokushima 770 8506 Japan Department of Materials Science and Engineering National Taiwan University of Science and Technology Taipei Taiwan

Bismuth oxychloride (BiOCl)/silver (Ag)/tungsten oxide (WO3) nanocomposite was produced by laser ablation to enhance photocatalytic performance. The ternary nanocomposite showed a superior photocatalytic activity for methylene blue (MB) degradation under visible light compared to pure BiOCl and BiOCl/Ag with degradation up to 74%, 62%, and 52 %, respectively. The addition of Ag improved the dispersibility of BiOCl and WO3, which reduced the recombination of electron-hole pairs and can be responsible for higher photocatalytic activity. © 2025 World Scientific Publishing Company.

关键词： Bismuth oxychloride laser ablation nanocomposite photocatalysis

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Biogas and biohydrogen production using the main agricultural biomasses generated in Brazil: An integrative analysis to contribute to the implementation of energy decarbonization

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International Journal of Hydrogen Energy 2025年 137卷 190-201页

作者： Maele Costa dos Santos Willian Cezar Nadaleti Grzegozr Przybyla Jones Bittencourt Machado Environmental and Energy Engineering Lab – LEAE Engineering Center – CEng Postgraduation Program in Environmental Sciences - PPGCAmb The Federal University of Pelotas – UFPel Pelotas Rio Grande do Sul Brazil Post-graduation Program in Materials Science and Engineering - PPGCEM. The Federal University of Pelotas – UFPel Pelotas Rio Grande do Sul Brazil Department of Thermal Technology Silesian University of Technology Poland

The use of bioenergy feedstocks, agricultural and forest residues constitute a viable decarbonization design with regards to biofuel production. Nevertheless, aspects within agriculture that can be related to this process for instance, include: technology and infrastructure, policies, land use, environmental factors among others. Solving these challenges needs research, technological intervention, supportive policies and acclaimed association among agriculture and energy departments, especially considering that agricultural and forest residues are an abundant source of biomass which can be converted into renewable energy, for example, biogas and hydrogen. This study provides an assessment of the capacity for generating biogas and biohydrogen using the primary biomasses produced in Brazil's agricultural sector, specifically from rice, corn, soybeans, and wheat as alternative bioenergy resources. Data regarding production and waste creation were collected from the Statistical and Geographical Information of Brazilian Agriculture at the Institute of Geography and Statistics of Brazil and the Energy Research Company. Corn and Soybean straw showed the highest potentials for biohydrogen (PH) production, accounting to 6,67 E+09 m 3 /year and 5,56 E+09 m 3 /year respectively. The energy production using the generated biogas showed the most satisfactory results compared to biohydrogen, with the highest generation values of 222 TWh of energy for corn straw, 187 TWh for soybean straw. The total accumulated biogas and biohydrogen produced from the residual biomass of Brazil's four main permanent crops was approximately 8.25 E+10 and 1.33 E+10 m 3 /year, respectively. The generation of biogas and hydrogen holds significant potential for fostering a more sustainable energy future. By utilizing the unique advantages of these two methods—biogas as a waste-to-energy option and hydrogen as a clean and adaptable energy source—we can develop a more robust, varied, and low-carbon energy

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Machine learning of microstructure–property relationships in materials with robust features from foundational vision transformers

arXiv

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arXiv 2025年

作者： Whitman, Sheila E. Latypov, Marat I. Graduate Interdisciplinary Program in Applied Mathematics University of Arizona TucsonAZ85721 United States Department of Materials Science and Engineering University of Arizona TucsonAZ85721 United States

Machine learning of microstructure–property relationships from data is an emerging approach in computational materials science. Most existing machine learning efforts focus on the development of task-specific models for each microstructure–property relationship. We propose utilizing pre-trained foundational vision transformers for the extraction of task-agnostic microstructure features and subsequent light-weight machine learning of a microstructure-dependent property. We demonstrate our approach with pre-trained state-of-the-art vision transformers (CLIP, DINOV2, SAM) in two case studies on machine-learning: (i) elastic modulus of two-phase microstructures based on simulations data;and (ii) Vicker’s hardness of Ni-base and Co-base superalloys based on experimental data published in literature. Our results show the potential of foundational vision transformers for robust microstructure representation and efficient machine learning of microstructure–property relationships without the need for expensive task-specific training or fine-tuning of bespoke deep learning models. © 2025, CC BY.

关键词： Elastic moduli

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Assessing the Microstructure of SnBiZn Alloys during Semisolid Treatment

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Advanced engineering materials 2025年

作者： de Siqueira Simioli, Carolina de Gouveia, Guilherme Lisboa Spinelli, José Eduardo Department of Materials Science and Engineering Federal University of São Carlos Rod. Washington Luis SP São CarlosCEP 13565–905 Brazil Graduate Program in Materials Science and Engineering Federal University of São Carlos Rod. Washington Luis Km 235 SP São CarlosCEP 13565-905 Brazil

The development of new alloys for semisolid processing is a key demand of Industry 4.0, driven by the limited knowledge in this area, particularly for Sn-based alloys. The primary goal is to design alloys suitable for thixocasting and semisolid additive manufacturing. While Zn is known to influence SnBi alloys by affecting their microstructure, wettability, and intermetallic compound formation, its impact on globule size, morphology, and microstructural coarsening/stability over aging remains largely unexplored, despite the potential implications for semisolid processability and final product reliability. In this research, stability in high-temperature experiments is verified for the Sn40Bi and Sn40Bi2Zn alloys (wt%). Five different heat treatment periods of 20, 40, 60, 90, and 120 min are applied to the samples, each subjected to its respective eutectic temperature according to CALPHAD computations. The microstructure of both alloys is characterized by Sn-rich globules for times higher than 90 min, which are noticeably finer and less elongated in the Sn40Bi2Zn alloy compared to the Sn40Bi. This globule refinement in Sn40Bi2Zn alloy can be attributed to the presence of Zn needles at the dendrite boundaries that pin the Sn-rich regions and prevent them from growing freely. Over time, while Bi saturates near its solubility limit in Sn matrix at 60 min and remains stable up to 120 min, the Sn40Bi2Zn alloy exhibits a progressive increase in Bi content between 60 and 120 min, reaching the saturation level at 120 min. The Sn40Bi2Zn alloy exhibits higher globule microhardness in the 90 min samples, primarily due to Zn hardening in solid solution. © 2025 The Author(s). Advanced engineering materials published by Wiley-VCH GmbH.

关键词： Niobium alloys

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Resolving Contradictory Estimates of Band Gaps of Bulk PdSe2: A Wannier-Localized Optimally-Tuned Screened Range-Separated Hybrid Density Functional Theory Study

arXiv

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arXiv 2025年

作者： Florio, Fred Camarasa-Gómez, María Ohad, Guy Naveh, Doron Kronik, Leeor Ramasubramaniam, Ashwin Department of Mechanical and Industrial Engineering University of Massachusetts Amherst AmherstMA01003 United States Department of Molecular Chemistry and Materials Science Weizmann Institute of Science Rehovoth7610001 Israel Institute for Nanotechnology and Advanced Materials Bar-Ilan University Ramat Gan52900 Israel Materials Science and Engineering Graduate Program University of Massachusetts Amherst AmherstMA01003 United States

Palladium diselenide (PdSe2)—a layered van der Waals material—is attracting significant attention for optoelectronics due to the wide tunability of its band gap from the infrared through the visible range as a function of the number of layers. However, there continues to be disagreement over the precise nature and value of the optical band gap of bulk PdSe2, owing to the rather small value of this gap that complicates experimental measurements and their interpretation. Here, we design and employ a Wannier-localized optimally-tuned screened range-separated hybrid (WOT-SRSH) functional to investigate the electronic bandstructures and optical absorption spectra of bulk and monolayer PdSe2. In particular, we account carefully for the finite exciton center-of-mass momentum within a time-dependent WOT-SRSH framework to calculate the indirect optical gap and absorption onset accurately. Our results agree well with the best available photoconductivity measurements, as well as with state-of-the-art many-body perturbation theory calculations, confirming that bulk PdSe2 has an optical gap in the mid-infrared (upper-bound of 0.44 eV). More generally, this work further bolsters the utility of the WOT-SRSH approach for predictive modeling of layered semiconductors. Copyright © 2025, The Authors. All rights reserved.

关键词： Layered semiconductors

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Al–20Sn–1Cu self-lubricating alloy: Correlations between microstructure coarsening, mechanical, and application properties

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Journal of materials Research and Technology 2025年 36卷 7284-7303页

作者： Sarah De Albuquerque Vinicius Leme Andrade Rodrigo V. Reyes Guillaume Reinhart Danielle Cristina Camilo Magalhães Henri Nguyen-Thi José Eduardo Spinelli Aix Marseille Univ Université de Toulon CNRS IM2NP Marseille France Federal University of São Carlos Graduate Program in Materials Science and Engineering 13565-905 São Carlos SP Brazil Department of Materials Engineering Federal University of São Carlos 13565-905 São Carlos SP Brazil

This study investigated the microstructure, microhardness, tensile strength, and dry wear behavior of the cast Al–20Sn–1Cu alloy (wt. %), focusing on the relationship between β-Sn phase morphology and the results. The Al–Sn–Cu alloys have been shown to be promising for plain bearing applications due to their self-lubricating properties. However, those alloys exhibit peculiar behaviors contrary to the classical Archard equation, which relates hardness to wear resistance, or to the typical behavior of metallic alloys, where increasing strength generally leads to a reduction in ductility. This can be attributed to the morphology, fraction and distribution of the β-Sn phase, a component of low hardness and strength but essential for self-lubricating functionality. In this study, the Al–20Sn–1Cu alloy solidified under a wide range of cooling rates varying from 1.0 to 28.9 °C/s was investigated. Dendritic spacing was measured using an automated method proposed in this study. The results showed that more refined samples had better tensile properties but compromised wear behavior. When the microstructure was refined up to dendritic spacing of 15.7 μm, a good combination between strength and ductility was achieved: a tensile strength of 72 MPa and an elongation of 14 % were obtained. These results can be explained by the increased contact area between the α-Al and β-Sn phases, which favors a strain hardening mechanism. However, these samples have very small β-Sn particles, which are insufficient to form an effective lubricating layer, resulting in severe wear due to adhesion. Despite that, it achieved a lower wear coefficient compared to other self-lubricating alloys reported in the literature.

关键词： Al-alloys Self-lubricating alloys Solidification Microstructure Wear Mechanical properties

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Corrigendum to "Effect of cell imprinting on viability and drug susceptibility of breast cancer cells to doxorubicin" [Acta Biomaterialia, 2020, 113, 119-129] (Acta Biomaterialia (2020) 113 (119–129), (S1742706120303287), (10.1016/***.2020.06.007))

引用

Acta Biomaterialia 2025年 198卷 571-572页

作者： Shahriyari, Fatemeh Janmaleki, Mohsen Sharifi, Shahriar Hesar, Milad Eyvazi Hoshian, Sasha Taghiabadi, Reza Razaghian, Ahmad Ghadiri, Majid Peirovi, Afshin Mahmoudi, Morteza Nezhad, Amir Sanati Khademhosseini, Ali Division of Engineering in Medicine Department of Medicine Brigham and Women's Hospital Harvard Medical School CambridgeMA United States Division of Health Sciences & Technology Harvard-Massachusetts Institute of Technology Massachusetts Institute of Technology CambridgeMA United States Department of Materials Engineering Faculty of Engineering Imam Khomeini International University Qazvin Iran Biomedical Engineering Graduate Program University of Calgary Canada Precision Health Program and Department of Radiology Michigan State University East LansingMI48824 United States RWTH Aachen University Templergraben 55 Aachen52062 Germany Department of Chemistry and Materials Science Aalto University School of Chemical Engineering Espoo Finland Department of Mechanical Engineering Faculty of Engineering Imam Khomeini International University Qazvin Iran Nano-Biotechnology Department Pasteur Institute of Iran Tehran Iran Departments of Bioengineering Chemical and Biomolecular Engineering and Radiological Sciences Center for Minimally Invasive Therapeutics California NanoSystems Institute University of California – Los Angeles Los AngelesCA United States Terasaki Institute for Biomedical Innovation Los AngelesCA United States

The authors regret to report that the images for panels h (Plain PDMS) and I (MCF7-imprinted PDMS) in Fig. 3 were mistakenly taken from the same dataset, resulting in the omission of the correct image in panel h for the Plain PDMS day 7 image. We sincerely apologize for this error. For an accurate representation, please see the corrected Fig. 3 provided here along with its original figure caption. This does not affect the validity of the statistical analyses or the overall conclusions drawn from the study. © 2025

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Effect of Sn addition on electrochemical activity of ribbons of Mg-Al-Ca anode material for rechargeable magnesium batteries fabricated by rapid solidification

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Keikinzoku/Journal of Japan Institute of Light Metals 2025年第1期75卷 9-13页

作者： Fukuta, Yoshitaka Kikura, Kensei Tsukeda, Tadayoshi Aida, Tetsuo Tabata, Hironobu Kurihara, Hideki Suzuki, Mayumi Program of Materials Science and Engineering Studies in Science and Engineering Graduate School of Science and Engineering University of Toyama 3190 Gofuku Toyama-shi Toyama930-8555 Japan Graduate School of Science and Engineering University of Toyama Toyama-shi Toyama Japan Faculty of Sustainable Design Academic Assembly University of Toyama Toyama-shi Toyama Japan CHUETSU METAL WORKS CO. LTD. Nakaniikawagun Toyama Japan Saitama Industrial technology Center Kawaguchi-shi Saitama Japan Department of Mechanical Systems Engineering Faculty of Engineering Toyama Prefectural University Imizu-shi Toyama Japan

Magnesium-based batteries are potential candidates for next-generation rechargeable batteries due to the divalent nature of magnesium cations and the natural abundance of magnesium resources. In this study, the electrochemical activity of Mg-6mass%Al-3mass%Ca anodes combined with Sn was investigated. Thin ribbons of the anode specimens were prepared by a single-roll rapid solidification method. The results showed that the electrochemical activity increased upon adding 1 mass% Sn, while it decreased for 3 mass% Sn. Based on the results of an X-ray diffraction analysis, the addition of Sn led to the formation of Mg2Sn and Ca2Sn phases, which increased the lattice distortion. Scanning electron microscopy observations indicated that these secondary phases were homogeneously distributed for 1 mass% Sn addition, while they were coarsely distributed for 3 mass% Sn. © 2025 The Japan Institute of Light Metals.

关键词： X ray diffraction analysis

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Recent advances in silver oxide-based superconductors: characterization, challenges and theoretical progress

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Journal of the Korean Ceramic Society 2025年 1-20页

作者： Duma, Tulus Na Humaidi, Syahrul Imaduddin, Agung Kechik, Mohd. Mustafa Awang Miryala, Muralidhar Postgraduate Program (Physics) FMIPA Universitas Sumatera Utara Medan Indonesia Research Center for Advanced Materials-National Research and Innovation Agency (BRIN) Tangerang Selatan Indonesia Superconductor and Thin Films Laboratory Department of Physics Faculty of Science Universiti Putra Malaysia UPM Serdang Selangor Darul Ehsan Malaysia Materials for Energy and Environmental Laboratory Superconducting Materials Group Graduate School of Science and Engineering Shibaura Institute of Technology Tokyo Japan

Recent advancements in superconductivity have generated significant interest in silver oxide-based materials due to their potential for unconventional superconducting mechanisms and unique electronic properties. This review provides a comprehensive analysis of recent progress in the synthesis, characterization and theoretical modeling of these superconductors. Experimental techniques such as hydrothermal, sol-gel and solid-state methods are critically assessed, highlighting key challenges in achieving the desired composition, crystal structure and phase purity. Additionally, the integration of density functional theory (DFT) and machine learning (ML) has emerged as a powerful approach for predicting novel silver oxide superconductors with improved properties, with recent models identifying candidate materials with potential $${T}_{c}$$ values exceeding 50 K. Despite these promising developments, significant challenges remain, particularly concerning large-scale production, material stability and superconducting phase optimization. By integrating experimental insights with computational advancements, this review outlines key directions for future research, aiming to accelerate the discovery and practical implementation of silver oxide-based superconductors for energy, quantum computing and electronic applications.

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Nonsaturated large magnetoresistance and transport dynamics in a n-doped cryogenic WSe2 field-effect device

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Physical Review B 2025年第12期111卷 125307-125307页

作者： Wei-Chen Lin Ching-Chen Yeh Jia-Zhu Zou Nhat Anh Nguyen Phan Inayat Uddin Hai Yen Le Thi Kenji Watanabe Takashi Taniguchi Gil-Ho Kim Department of Engineering and System Science National Tsing Hua University Hsinchu 300 Taiwan Taiwan International Graduate Program Academia Sinica Taipei 115 Taiwan Department of Physics National Taiwan University Taipei 106 Taiwan Department of Electrical and Computer Engineering Sungkyunkwan University (SKKU) Suwon 164 Republic of Korea Sungkyunkwan Advanced Institute of Nano Technology (SAINT) Sungkyunkwan University (SKKU) Suwon 16419 Republic of Korea Research Center for Electronic and Optical Materials National Institute for Materials Science 1-1 Namiki Tsukuba 305-0044 Japan Research Center for Materials Nanoarchitectonics National Institute for Materials Science 1-1 Namiki Tsukuba 305-0044 Japan

Interest in the two-dimensional (2D) semiconducting transition metal dichalcogenides (TMDs) continues to intensify, driven by their suitable band gaps to supplant silicon as next-generation semiconductor materials. Among various TMDs, tungsten diselenide (WSe2) is renowned for its superior electrical properties in carrier density and mobility under ambient conditions. Despite its notable attributes, the behavior of monolayer WSe2 in the electron-doped regime under cryogenic conditions remains largely uncharted, particularly concerning its magnetotransport properties. In this study, we reveal the transport mechanisms of monolayer WSe2 from high temperatures down to the cryogenic regime. As evident by Efros–Shklovskii variable-range hopping (E-S VRH) in the cryogenic regime, strong Coulomb interactions arise between electrons. Above 8 K, an uncommon nonsaturated quadratic large magnetoresistance (MR) can be explained by the wave-function shrinkage model, which is consistent with the E-S VRH transport mechanism. Notably, the nonsaturated quadratic large MR shows a magnitude up to 1740% at 13 T. These findings underscore the potential applications for monolayer WSe2 in cryogenic field-effect devices, magnetic sensors, and memory devices and mark a significant advance in magnetotransport research.

关键词： Monolayers

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