材料科学最新文献

{"title":"Hydrogen Evolution Using Alloyed AuPd/TiO2 Hollow Spheres by Photoreforming of Polyethylene Terephthalate Wastes","authors":"Nashwan Hussein Mohammed Sulaiman, Shuai Wang, Hairong Yue, Jiake Wei, Patrik Schmuki, Xuemei Zhou","doi":"10.1039/d5ta00189g","DOIUrl":"https://doi.org/10.1039/d5ta00189g","url":null,"abstract":"Upcycling polyethylene terephthalate (PET) wastes by photoreforming is a sustainable approach in energy production and waste treatments. In this study, PET was recycled into hydrogen and acetates using photocatalysts, that are prepared by coprecipitation of Au and Pd on amorphous TiO2 hollow spheres with high specific surface area. The strong electronic interactions at the interface, significantly enhancing the catalytic performance for hydrogen evolution (1.26 mmol g-1 h-1), that is 126 times increase compared to bare TiO2 (0.01 mmol g-1 h-1). Calculations on the formation energy using density functional theory (DFT) suggest that the formation of AuPdTi alloy is energetically favorable, and the strong metal support interaction by transferring electrons at the interface between TiO2 and the nanoalloy can enhance the separate efficiency of charge carriers. Hydrogen is produced from the reduction reaction from protons with electrons on the active AuPdTi sites and the oxidation reaction takes place by photogenerated holes at the spheric sites of the AuPdTi nanoalloys on TiO2 HS. Our findings thus suggest a pathway for designing effective alloyed photocatalysts aimed at the upcycling of PET wastes.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":"23 1","pages":""},"PeriodicalIF":11.9,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143618894","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Grain Size Engineering via Hf0.5Zr0.5O2 Seed Layer for FeFET Memory and Synaptic Devices","authors":"Junhyeok Park, Chulwon Chung, Boncheol Ku, Seunghyeon Yun, Kyungsoo Park, Changhwan Choi","doi":"10.1039/d4nr05381h","DOIUrl":"https://doi.org/10.1039/d4nr05381h","url":null,"abstract":"This study demonstrates the use of a top-gate ferroelectric field effect transistor (FeFET) with replacement electrode solid phase epitaxy (SPE) method and high deposition temperature during atomic layer deposition (ALD). By employing these engineering techniques, the average grain size was successfully reduced, and the formation of the non-ferroelectric monoclinic phase (m-phase) was effectively inhibited. In terms of ferroelectric properties, both the remnant polarization (2Pr) and coercive field (Ec) values demonstrated significant enhancement, with increases of 35 % and 42 %, respectively. Notably, improvements were observed in memory characteristics, with the memory window (MW) increasing from 0.3 V to 0.9 V and endurance enhancing by three orders of magnitude. In terms of synaptic properties, there was an enhancement in the number of conductance states from 100 to 136, the Gmax/Gmin ratio increased from 5.3 to 90, and improvement in weight update linearity. The simulation results based on the MNIST dataset show an improvement in inference accuracy from 65 % to 85 %.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"32 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143618292","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Non-Precious Metal High-Entropy Alloys for CO2 Electroreduction","authors":"Runyu Xing, Xingyu Wang, Guangbo Wang, Zeyi Lu, Xiang Yang, Hongqiang Wang, Yun He, Xingyuan San, Xiaoguang Liang, Vellaisamy A L Roy","doi":"10.1039/d5nr00260e","DOIUrl":"https://doi.org/10.1039/d5nr00260e","url":null,"abstract":"Non-precious metal high-entropy alloys (HEAs) with the merits of low cost for effective CO2 reduction reaction (CO2RR) are still in their infancy. In this work, we prepared the non-precious CuCoAlFeNi HEA using a solvothermal method. The prepared CuCoAlFeNi HEA showed a homogeneous element distribution in the solid solution structure. Compared to the C1 product (HCOOH) yielded by Cu nanoparticles in H-type cell, the CuCoAlFeNi HEA presented a Faraday efficiency of 36.56% towards the C2 product (CH3CH2OH). In situ Raman measurements revealed the CO2RR intermediates and the corresponding reaction pathway. In addition, the CuCoAlFeNi HEA catalyst exhibited superior electrochemically catalytic stability and reusability. This work demonstrates the selectivity towards C2 products, stability, and reusability of CuCoAlFeNi HEA, presenting the potential application of non-precious metal HEAs in CO2RR.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"42 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143618293","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synergistic Plasma Activation-Enabled Low-Temperature Cobalt/SiO2 Hybrid Bonding without Oxide Interfaces","authors":"Xiaoyun Qi, Yufei Bai, Han Yan, Xiaohui Yuan, Yan Ma, Tadatomo Suga, Chenxi Wang","doi":"10.1021/acsami.4c21182","DOIUrl":"https://doi.org/10.1021/acsami.4c21182","url":null,"abstract":"Metal passivation participating in bonding is a promising method for hybrid bonding to fabricate high-density devices and high-computing instruments, by turning Cu/SiO₂ bonding into passivation/SiO₂ bonding and evading the obstacles of Cu oxidation. However, the performance of the passivated metal bonding interface and the process compatibility for SiO₂–SiO₂ bonding are crucial for higher speed and lower power consumption but neglected. In this article, we introduce cobalt (Co) as a hybrid bonding metal and demonstrate a facile bonding method for combining Co–Co, Co–SiO₂, and SiO₂–SiO₂. This approach enables cobalt-participated hybrid bonding through synergistic NH₃/H₂O → Ar plasma treatment. Cobalt (Co) reduction and SiO₂ hydrophilization are simultaneously realized by a one-step NH₃/H₂O plasma activation from vaporized ammonia liquid for ease of metallization and dehydration bonding to be obtained, respectively. Moreover, by introducing the subsequent Ar plasma treatment, the reoxidation from the oxygen-containing process and overadsorption of H₂O are evaded without hindering the construction of the interface. Additionally, the roughness of surfaces is significantly smoothed without gas-storage microstructure topography. The well-prepared surfaces enable surface reaction and interface construction without void generation thanks to the effective activation and process tune-up. Remarkably, the atomic interconnection is facilitated for both homo- and heterogeneous bonding at temperatures as low as ∼200 °C. With the increase in yield of the bonding area, the three bonded interfaces can obtain about 1.5 times the promotion with a 25% decrease in Co–Co interfacial resistivity. The Co-passivated hybrid bonding with synergistic activation could be used for high-density integration with efficient communication due to their favorable interfacial performance and feasible process^.","PeriodicalId":5,"journal":{"name":"ACS Applied Materials & Interfaces","volume":"69 1","pages":""},"PeriodicalIF":9.5,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143618993","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Eco-friendly ink formulations with acrylated epoxidized linseed oil binders: Balancing performance and sustainability","authors":"Manjinder Singh ,&nbsp;Brahma Prakash ,&nbsp;Rahul Lodhi ,&nbsp;Anurag Kulshreshtha ,&nbsp;Gaurav Manik","doi":"10.1016/j.porgcoat.2025.109199","DOIUrl":"10.1016/j.porgcoat.2025.109199","url":null,"abstract":"<div><div>The demand for acrylic-based resins as binders in printing inks has grown enormously due to their superior adhesion, gloss, and film-forming properties. This study presents the synthesis of acrylated epoxidized linseed oil (AELO) and its polymer, poly (AELO/MMA) to be employed as sustainable binders in ink formulations for paper printing applications. The formulated inks exhibited desirable particle sizes below 1 μm and surface tensions of 24.65 and 26.62 mN/m, meeting the industry standards for optimal printing performance. The contact angle and viscosity measurements confirmed enhanced wettability and transferability on paper substrates, with storage stability for at least one month. Surface morphological analysis revealed a uniform pigment particle distribution, facilitating rapid drying times (4–7 s), with the poly (AELO/MMA)-based ink displaying superior gloss, indicative of excellent print quality. Rub resistance analysis demonstrated that poly (AELO/MMA)-based ink experienced minimal changes in porosity due to abrasion, highlighting its robustness for printing applications. The <em>ΔE</em> values for color strength were desirably below 1 for AELO (0.83) and poly (AELO/MMA)-based inks (0.85), indicating color shifts imperceptible to the human eye and exhibiting high rub resistance. Additionally, optical retention was maintained above 90 %, preserving both visual and functional properties. This study paves the way to demonstrate and utilize the unexpected potential of linseed oil-based green binders, which can effectively replace petrochemical-derived resins, offering a sustainable and performance alternative for eco-friendly paper printing ink formulations.</div></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":"204 ","pages":"Article 109199"},"PeriodicalIF":6.5,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143619356","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impact of gradient nanocomposite coating design on the surface mechanical properties of soft composite substrate","authors":"Ayse Cagil Kandemir ,&nbsp;Azca Sajid ,&nbsp;Muhammad Ali Shaheer Khan ,&nbsp;Talha Rafiq ,&nbsp;Hatice Kaplan Can","doi":"10.1016/j.porgcoat.2025.109228","DOIUrl":"10.1016/j.porgcoat.2025.109228","url":null,"abstract":"<div><div>This study examines the influence of gradient nanocomposite coatings on the surface mechanical properties of soft composite substrates (modulus: 150 MPa). Polyvinylpyrrolidone reinforced with halloysite nanotubes was used to fabricate gradient (e.g. 5/15/30 wt%) and reverse gradient (e.g. 30/15/5 wt%) coatings for comparative analysis. Reverse gradient coatings consistently exhibited superior surface properties, particularly in thicker (30 μm) systems, where stiffer sublayers effectively transferred stress to the surface. The 30/15/5 reverse gradient coating achieved a modulus of 2.92 GPa, significantly outperforming its gradient counterpart (0.33 GPa) at similar indentation depths. In contrast, thinner (15 μm) gradient coatings with smaller concentration variations (5/10/15 wt%) facilitated a significantly smoother mechanical transition and improved stress distribution, while larger concentration differences (5/15/30 wt%) amplified substrate effects, increasing indentation depth. These findings highlight the trade-offs in coating design: gradient coatings optimize mechanical transitions, making them ideal for functional interfaces and load-distributing layers, while reverse gradient coatings ensure greater mechanical consistency, making them suitable for protective and structural applications requiring enhanced surface durability.</div></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":"204 ","pages":"Article 109228"},"PeriodicalIF":6.5,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143619358","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Smart anticounterfeiting approach: Mineral oil-free offset ink with fluorescent features and audio signal, detected using a customized combi-reader","authors":"Anand P.J. ,&nbsp;Namratha Ullal ,&nbsp;Rakshitha Jain ,&nbsp;Dhanya Sunil ,&nbsp;Mahesha M.G. ,&nbsp;Ashok Rao ,&nbsp;Nagabhushana Nayak","doi":"10.1016/j.porgcoat.2025.109237","DOIUrl":"10.1016/j.porgcoat.2025.109237","url":null,"abstract":"<div><div>Counterfeiting of documents or branded products is considered as a menace due to their negative impact on economy and society. Therefore, there is an immediate need to develop anti-counterfeiting solutions to identify or distinguish illicitly reproduced fake items among the genuine ones. Though several anti-counterfeiting technologies are available, security inks have garnered immense importance due to the diverse options of incorporating unique safety features in them. The present study demonstrates the formulation of a new, sustainable and stable mineral oil-free, invisible offset ink incorporating two types of fluorophores (DC-Red and UC-Green), which when printed on diverse substrates reveals distinctive identification features detectable through a specially designed single unit device. The prints obtained using the ink on various types of paper and fabric substrates reveal good photostability and adherence features. The printed samples display prominent red down-conversion fluorescence under 365 nm UV source and green up-conversion fluorescence upon shining with 980 nm laser beam in combination with a beeping audio response upon irradiating with 940–980 nm near-IR source using an IR taggant reader. These multi-level covert security features achieved using a single sustainable formulation are difficult to identify/replicate by the forger but can be easily validated by the user by means of the newly designed combi-reader. The smart programmable single unit combi-reader comprising of a buzzer together with UV and IR light sources is fabricated to authenticate the security features, rather than three independent devices with different light sources and detectors. Visually observable down-conversion and up-conversion fluorescence coupled with audible beeping that are detected using the new customizable combi-reader enables easy, rapid, and non-destructive identification as well as authentication of genuine products or documents.</div></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":"204 ","pages":"Article 109237"},"PeriodicalIF":6.5,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143619355","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Exploring wood as a sustainable solution for water filtration: nanoparticle removal, size exclusion and molecular adsorption","authors":"Antoni Sánchez-Ferrer,&nbsp;Jenifer Guerrero Parra","doi":"10.1007/s00226-025-01645-7","DOIUrl":"10.1007/s00226-025-01645-7","url":null,"abstract":"<div><p>In regions where microbial contamination of groundwater and surface water remains a significant public health concern, leading to around 505,000 annual deaths, there is an urgent need for accessible, cost-effective, and simple household water treatment solutions. This study investigated the feasibility of wood as a filtration system, with a focus on its ability to remove nanoparticles. The research underscores the remarkable potential of wood filters, particularly in radial and tangential directions, exhibiting superior particle removal capabilities (&gt; 99%) due to extended residence time and intricate microstructures. The study reveals that wood type selection in this study, i.e., yellow poplar (<i>Liriodendron tulipifera</i>), European beech (<i>Fagus sylvatica</i>), Douglas fir (<i>Pseudotsuga menziesii</i>), and silver fir (<i>Abies alba</i>), plays a crucial role in filtration efficiency, with beech emerging as a high-performing option alongside silver fir. Importantly, the optimal range of size exclusion was identified (160–490 nm), aiding in designing wood filters for specific particle size reduction goals. Wood filters also show great potential for removing a broad range of microorganisms, i.e., bacteria and protozoa, as well as nanoplastics and microplastics, which could have profound implications for water treatment and environmental remediation. Furthermore, the study highlights the adsorption/diffusion process through the amorphous domains of the wood biopolymers, i.e., cellulose, hemicelluloses and lignin, enhanced by electrostatic interactions in the filtration efficiency for small organic molecules, providing valuable insights into filtration mechanisms.</p></div>","PeriodicalId":810,"journal":{"name":"Wood Science and Technology","volume":"59 3","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00226-025-01645-7.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143622229","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Single-Atom Cu Anchored on Carbon Nitride as a Bifunctional Glucose Oxidase and Peroxidase Nanozyme for Antibacterial Therapy","authors":"Fan Wu, Yaran Wang, Yuanfeng Li, Linqi Shi, Lu Yuan, Yijin Ren, Henny C. van der Mei, Yong Liu","doi":"10.1021/acsnano.4c12348","DOIUrl":"https://doi.org/10.1021/acsnano.4c12348","url":null,"abstract":"A very promising strategy to avoid bacterial drug resistance is to replace antibiotics with artificial nanozymes, but this has not yet been translated to the clinic. Here, we construct a single-atom nanozyme using graphitic carbon nitride nanosheets modified by copper (Cu-<i>g</i>-C₃N₄). This Cu-<i>g</i>-C₃N₄ nanosheet possesses both glucose oxidase-like and peroxidase-like activities responsible for reactive-oxygen-species generation by a cascade reaction to eradicate Gram-positive and Gram-negative multidrug-resistant bacteria. Cu-<i>g</i>-C₃N₄ is introduced into polycaprolactone (PCL) by electrospinning to obtain (Cu-<i>g</i>-C₃N₄/PCL) nanofibers, which can be used as a dressing for bacterially infected wounds. It is demonstrated that Cu-<i>g</i>-C₃N₄/PCL nanofiber dressings can eradicate bacterial infections and accelerate wound healing in a mouse model with a skin wound.","PeriodicalId":21,"journal":{"name":"ACS Nano","volume":"9 1","pages":""},"PeriodicalIF":17.1,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143627451","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Rationally-Constructed Porous Nanosheet Ni2P–Ni5P4 Heterostructures for Robust Oxygen Evolution Electrode","authors":"Min Jie Wang, Bingjie Zhou, Yangyang Feng, Shenghao Hu, Dan Wang, Li Wang, Yongjun Han, Qingbin Li, Yonghui Deng, Liwei Mi","doi":"10.1021/acsami.4c22867","DOIUrl":"https://doi.org/10.1021/acsami.4c22867","url":null,"abstract":"The development of superior non-noble-metal-based oxygen evolution reaction (OER) electrocatalysts is essential for large-scale hydrogen production. In this study, an integrated porous nanosheet Ni₂P–Ni₅P₄ heterostructures were designed as an excellent OER electrocatalyst. The synthesized heterostructures demonstrated notable activity, achieving a small overpotential of 260 mV to sustain a typical 10 mA cm^–2 current density, along with exceptional durability over 2000 CV cycles. The distinctive porous nanosheet structure enhances the exposure of active sites and improves mass transport efficiency. Density functional theory (DFT) calculations revealed that the <i>d</i>-band center of active Ni sites was shifted downward, reducing the adsorption strength of critical oxygen-containing intermediates (*O, *OH, and *OOH) in the Ni₂P–Ni₅P₄ heterostructures. This modification lowered the reaction barrier for the rate-determining step (RDS) involving the transformation from *O to *OOH, thereby boosting inherent OER activity. Additionally, partial electron localization in combination with the RDS *O intermediate was observed by electron localization functions (ELFs) in Ni₂P–Ni₅P_4, weakening the overall interaction. Further integrated crystal orbital Hamiltonian population calculations confirmed a reduced Ni–O net bonding energy of 0.69 eV for the adsorbed *O compared to that of Ni₂P (1.49 eV) and Ni₅P₄ (1.12 eV) aligning with the DFT and ELF findings. These results provide a promising approach and valuable guidance for the design of cost-effective OER electrocatalysts suitable for energy storage applications, including metal–air cells and water oxidation processes.","PeriodicalId":5,"journal":{"name":"ACS Applied Materials & Interfaces","volume":"89 1","pages":""},"PeriodicalIF":9.5,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143627581","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}