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Harnessing the enol/keto-form emission of ESIPT: mechanochromism, multi-channel imaging, and detection of a chemical warfare agent mimic

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Science China materials 2025年第2期68卷 448-454页

作者： Kangmin Wang Min Zhang Danni Yang Liqiu Wan Shouxin Zhang Liang Yan Ke Yang Bijin Li Chongqing Key Laboratory of Natural Product Synthesis and Drug Research School of Pharmaceutical Sciences&Department of Medical LaboratoryShapingba Hospital Affiliated to Chongqing UniversityChongqing UniversityChongqing 401331China State Key Laboratory of NBC Protection for Civilian Beijing 100191China Jiangsu Key Laboratory of Advanced Catalytic Materials&Technology School of Petrochemical EngineeringChangzhou UniversityChangzhou 213164China

Reported herein is the first time mechanochromicmaterials based on sole enol-form emission of 2-(2’-hydroxyphenyl)azoles containing one triphenylamine (TPA).Three different single crystals were obtained and representpristine, intermediate, and ground states, respectively. The 2-(2’-hydroxyphenyl)azoles containing two TPA exhibit balanced dual-emission and could be used in multi-channelimaging, and selectivity accumulated in mitochondria of livingcells. In addition, we developed the first example of excitedstate intramolecular proton transfer (ESIPT) materials withsole enol-form emission and balanced dual-emission to detectchemical warfare agents (CWAs) mimic diethyl chlorophosphate (DCP) with good selectivity, highly sensitive, and fastresponsive.

关键词： fluorescent materials enol-form emission keto-form emission ESIPT chemical warfare agents

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Hydratable Janus Membranes with Robust Antiwetting Pores for Stable Membrane Distillation of Saline Oily Wastewater

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ACS Applied materials and Interfaces 2025年第21期17卷 31667-31676页

作者： Huang, Cheng Qin, Qi Chen, Zhongao Chen, Xiao Zhang, Pengchao Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Materials Science and Engineering Wuhan University of Technology Wuhan 430070 China Hubei Longzhong Laboratory Wuhan University of Technology Xiangyang Demonstration Zone Xiangyang 441000 China Sanya Science and Education Innovation Park Wuhan University of Technology Sanya 572024 China

Janus membranes, composed of a hydrophilic surface layer and a hydrophobic substrate, are potential candidates for membrane distillation (MD) to prevent organic substance induced wetting in saline oily wastewater treatments. However, owing to insufficient hydrophobicity of pore surfaces, traditional hydrophobic substrates suffer from pore wetting and limited MD performance stability when saline water penetrates through the hydrophilic layer. Herein, we present a Janus polyvinylidene fluoride (PVDF) nanocomposite membrane with robust pore surface antiwettability for stable MD desalination of saline oily wastewater. Hydrophobic silica (SiO2) nanoparticles are used to build nanostructures on pore surfaces to significantly enhance their hydrophobicity for preventing pore wetting. The superhydrophilic tannic acid/Fe (TA/Fe) layer provides a hydratable surface to promote water molecule absorption, facilitate the evaporation rate, and effectively impede oil/surfactant/gypsum contaminants. As a result, the TA/Fe-PVDF/SiO2 Janus membrane shows stable desalination (32 h) with a high flux of 25.2 kg m-2 h-1 and salt rejection (>99.9%) for saline oily solution. This work provides a promising approach to develop high-performance Janus membranes with antiwetting ability for stable saline oily wastewater treatment. © 2025 American Chemical Society.

关键词： antiwetting pores Janus membrane membrane distillation saline oily wastewater stable desalination

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Study on Synergistic Extraction of Iron from Carbide Slag and Nickel Slag

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Journal of Sustainable Metallurgy 2025年 1-10页

作者： Yang, Lushun Li, Bin Du, Xueyan Han, Mengyao School of Materials Science and Engineering Lanzhou University of Technology Lanzhou730050 China State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals Lanzhou University of Technology Lanzhou730050 China

Iron recovery from nickel slag, a significant byproduct generated during nickel pyrometallurgical process, represents a pivotal aspect of advancing sustainable utilization of metallurgical solid waste. This study explores the potential of utilizing carbide slag as a fluxing modifier to enhance iron extraction from nickel slag through the melting oxidation process. Thermodynamic simulations were conducted with FactSage software to predict phase equilibria and reaction pathway, while experimental analyses were performed to investigate phase composition, microstructural morphologies, and iron recovery efficiencies. The results indicate that in the FeO–SiO2–CaO–MgO slag system, predominant magnetite emerges as the primary iron-bearing phase in the spinel region. Increasing the slag’s basicity shifts the corresponding phase area of spinel increases first and then decreases. Thermodynamic predictions and experimental data corroborate that the addition of carbide slag facilitates the transformation of the fayalite phase into magnetite and pyroxene phases. Optimal basicity levels enhance the precipitation and crystal growth of magnetite, as well as promote the separation of iron from the slag matrix. Specifically, at a basicity of 0.5, the oxidized samples displayed the highest magnetite precipitation, with a recovery rate of 93.2%. Detailed microstructural analysis revealed the formation of well-defined dendritic magnetite crystals. These findings suggest that the introduction of carbide slag not only optimizes the phase transformation processes but also significantly enhances iron recovery, offering a viable pathway for the synergistic reutilization of nickel and calcium carbide slags. © The Minerals, Metals & materials Society 2025.

关键词： Magnetite

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Simultaneous Enhancement of Electron and Phonon Transport Properties via Magnetism Phase Transition in FexCo2-xTiGe Heusler Alloy

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Small 2025年第21期21卷 e2500154页

作者： Li, Yongqiang Wang, Hanwen Cui, Wenjun Lin, Weixiao Sun, Yue Zhao, Wen Sang, Xiahan State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Wuhan University of Technology Shenzhen Institute Shenzhen518000 China Nanostructure Research Center Wuhan University of Technology Wuhan430070 China Shandong Qingdao266580 China

Magnetism offers an additional degree of freedom to control the electron and phonon transport properties of thermoelectric materials through various thermoelectromagnetic effects. To better understand the interplay among spin, carriers, and phonons, it is important to design material systems with intrinsic magnetic and thermoelectric properties. Here, it is demonstrated that Fe doping of the full Heusler alloy Co2TiGe simultaneously enhances its magnetic and thermoelectric performance. Aberration-corrected scanning transmission electron microscopy (STEM) reveals that Fe atoms preferentially substitute for Co atoms within the Co2TiGe lattice, leading to increased saturation magnetization and a higher Curie temperature. This Fe substitution reduces the carrier concentration, enhancing the Seebeck coefficient and power factor, while also increasing magnetic scattering due to spin fluctuations during the ferromagnetic-paramagnetic phase transition. Furthermore, the thermal conductivity is significantly reduced by enhanced phonon scattering from secondary phases and point defects. Consequently, a maximum ZT value of 0.066 is achieved at 600 K for Fe0.4Co1.6TiGe, representing a 663% increase compared to the undoped Co2TiGe. © 2025 Wiley-VCH GmbH.

关键词： Saturation magnetization

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Lattice Boltzmann simulation of droplet dynamics in proton exchange membrane fuel cell channel with mechanical vibration

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Chemical Engineering Research and Design 2025年 218卷 302-311页

作者： Zhou, Zijian Zhai, Shuai Liu, Xunchen Fang, Yuan Chen, Mingzhang Zhang, Ju Guan, Shanyue Hubei Longzhong Laboratory Wuhan University of Technology Hubei Xiangyang441000 China School of Automotive Engineering Wuhan University of Technology Wuhan430070 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan430070 China Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education College of Chemistry and Materials Science South-central University for Nationalities Wuhan430074 China School of Vehicle Engineering Hubei University of Automotive Technology Shiyan442002 China

Handling water is a critical challenge for proton exchange membrane (PEM) fuel cells, significantly impacting their lifespan and reliability. While most PEM cells operate in vibrational environments, no studies have examined how mechanical vibrations affect water handling. This research investigates water droplet behavior in a vibrating airflow channel and proposes a new design featuring a hydrophilic band to enhance water management. key findings include: (1) an optimal hydrophilic band width of 0.6 that facilitates droplet movement;(2) a decrease in droplet velocity from 0.107 to 0.024 m s−1 as amplitude increases from 5 mm to 20 mm;and (3) an increase in velocity from 0.0669 to 0.15 m s−1 with higher frequency, highlighting the significant effects of vibration on droplet dynamics and overall water management in PEM fuel cells. © 2025 Institution of Chemical Engineers

关键词： Machine vibrations

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Ablation behavior and mechanism of MoSi2/mica/HSM modified CF/BPR composites during prolonged ablation of oxyacetylene flame

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Ceramics International 2025年

作者： Zhang, Shiquan Zhang, Jian Hu, Sheng Zhang, Ruizhi Li, Junguo Shen, Qiang State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Hubei Xiangyang441000 China School of Chemical and Environment Engineering Hubei Minzu University Enshi445000 China

Ablative thermal protection materials are widely used in entry and re-entry vehicles which benefit from their strong adaptability. However, long-term ablation has been a limitation due to the consumption of the matrix of the ablative materials. In this work, the microstructure evolution and ablation properties of the MoSi2/mica-modified CF/BPR composites with and without hollow silicate glass microspheres (HSMs) under protracted ablation have been investigated. The mass ablation rates decreased while the linear ablation rates increased when the ablation times were prolonged. The composites with 30 vol.% HSMs have good insulation properties, shown by a lower backside temperature of 240.9 °C after 100 s of ablation. The decrease in thermal conductivity limited heat transfer in both the axial and horizontal directions. This led to heat concentration and severe ablation at the central surface. The three-dimensional porous and the ladder structure formed in the transfer region, and the features gradually disappeared while extending the ablation times because of the flame erosion and formed liquid phases. The heat diffusion and concentration within the matrix established a gradient temperature field, which determined the ablation behavior and mechanism, providing valuable insights for the development of advanced ablative thermal protection materials. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Silicates

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Constructing hierarchically ordered structures in PP/POE-g-MAH/GNP composites to achieve simultaneous enhancement of strength and toughness

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Polymer 2025年 328卷

作者： Li, Zhengzhuo Wang, Guomei Tang, Xiran Pan, Yang Ji, Yuan Wu, Hong Guo, Shaoyun State Key Laboratory of Advanced Polymer Materials Sichuan Provincial Engineering Laboratory of Plastic/Rubber Complex Processing Technology Polymer Research Institute of Sichuan University Chengdu610065 China

How to regulate dispersion of graphite nanoplatelet (GNP) in polymers efficiently and further construct hierarchically ordered structures of polymer composites for achieving simultaneous improvement of the strength and the toughness, remains a major challenge. In this work, maleic anhydride grafted polyolefin elastomer (POE-g-MAH) was used as a diluent to prepare a GNP/POE-g-MAH masterbatches via in-situ exfoliation of graphite based on co-milling process with POE-g-MAH. The prepared GNP not only has large lateral size, but also introduces a small number of oxygen-containing groups on the surface to improve the interface interaction with polypropylene (PP)/POE-g-MAH. Furthermore, the hierarchically ordered structures in the PP/POE-g-MAH/GNP composites were successfully constructed under an enhanced extensional and shearing combined force field during multistage stretching extrusion. The PP matrix formed the shish-kebab crystalline structure, while the GNP was uniformly dispersed and highly oriented along the flow direction. Moreover, the POE-g-MAH phase formed fibrous and ribbon-like structures. Benefiting from the hierarchically ordered structures, the PP composites possessed excellent tensile strength (55.7 MPa) and impact strength (43.4 J/m2), increased by 83 % and 933 % compared with pure PP, respectively. The mechanism for synchronized strengthening and toughening of the PP composites is also proposed. This work provides a new strategy for the efficient preparation of GNP and simultaneous enhancement in the strength and toughness of the PP composites. © 2025

关键词： Polymer matrix composites

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Boosting oxygen evolution of LiCoO2 electrocatalysts via lithium defect

Materials Today Catalysis

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materials Today Catalysis 2025年 8卷

作者： Li, Huamei Li, Mengyuan Liao, Lingling Yang, Han Xiang, Kun Luo, Guoqiang Xie, Mingjiang School of Chemistry and Environmental Engineering Engineering Research Center of Phosphorus Resources Development and Utilization of Ministry of Education Wuhan Institute of Technology Wuhan430205 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Hubei Key Lab for Processing and Application of Catalytic Materials College of Chemical Engineering Huanggang Normal University Huanggang438000 China

The challenge of the complex oxygen evolution reaction (OER) currently impedes the efficient production of hydrogen via electrolytic water splitting. To address this issue, the development and improvement of effective electrocatalysts are required. LiCoO2, a key material in lithium-ion batteries, has shown promising potential as an electrocatalyst for electrochemical energy conversion. However, OER catalysts derived from LiCoO2 have faced obstacles such as high overpotential and a complicated preparation process. In this study, the preparation method is adjusted to optimize the synthesis of Li1-xCoO2 with a defective structure, resulting in an impressive overpotential of only 290 mV at a current density of 100 mA cm−2 and a remarkable Tafel slope of 15.2 mV dec−1. The exceptional catalytic activity of Li1-xCoO2 can be attributed to the absence of Li, which triggers oxidative alterations in the electronic structure of Co. Density functional theory (DFT) calculations reveal that Li defects can influence the d-band center of active Co sites, enhancing the adsorption capabilities of Co sites towards *OOH intermediates and increasing the conductivity of the electrocatalyst during the OER process. These alterations improve the velocity of the crucial step in the reaction, ultimately boosting the catalyst's overall performance and efficiency. © 2024 The Authors

关键词： Lithium-ion batteries

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Refined platelet size: Unlocking enhanced mechanics in nacre-mimetic mineralized materials

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Nano Today 2025年 62卷

作者： Chen, Wei Ma, Yuanyuan Xu, Shiqing Wang, Yang Zhang, Pengchao Meng, Jingxin Fu, Zhengyi Wang, Shutao CAS Key Laboratory of Bio-inspired Materials and Interfacial Science Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing100190 China Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Materials Science and Engineering Wuhan University of Technology Wuhan430070 China University of Chinese Academy of Sciences Beijing100049 China

Nacre-mimetic mineralized (NMM) materials with outstanding mechanical properties have been considered as future structural materials. However, replicating nacre's characteristics into artificial ones in mild conditions has been challenging, particularly in controlling the platelet size, which is crucial for mechanical performance. Here, inspired by mollusk biomineralization, we achieve the unprecedented regulation of aragonite platelet sizes (ranging from 76 to 5800 μm2) at the micrometer scale by manipulating amorphous nano calcium carbonate content, thereby enhancing the mechanical properties of NMM materials. Experimental and simulation results demonstrate that merely decreasing the aragonite platelets' sizes can significantly increase the flexural strength and modulus by 2.8 and 9.9 times, respectively. Notably, the proposed strategy not only has the potential for large-scale production but also produces refined NMM material that closely resembles natural nacre in terms of microstructure and mechanical properties, showing ca. 26 % improvement in specific strength over previously reported NMM materials. Consequently, this work provides a feasible way for developing advanced biomimetic structural materials with specific functions, such as protective gear and artificial bone grafts. © 2025 Elsevier Ltd

关键词： Biomimetic mineralization Mechanical property Nacre-mimetic materials Platelet size

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Intrinsic ion migration-induced susceptible two-dimensional phase-transition memristor with ultralow power consumption

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Science Bulletin 2025年

作者： Qin, Lanhao Yu, Yimeng Fang, Cheng Liu, Yujie Zhu, Kaichen Ouyang, Decai Liu, Shenghong Song, Bailing Zhou, Ruochen Lanza, Mario Hu, Wenhua Wu, Jinsong Li, Yuan Zhai, Tianyou State Key Laboratory of Materials Processing and Die & Mould Technology School of Materials Science and Engineering Huazhong University of Science and Technology Wuhan430074 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Center of Hydrogen Science State Key Laboratory of Metal Matrix Composites School of Materials Science and Engineering Innovation Center for Future Materials Shanghai Jiao Tong University Shanghai200240 China Physical Science and Engineering Division King Abdullah University of Science and Technology Thuwal23955-6900 Saudi Arabia School of Computer Science and Artificial Intelligence Wuhan University of Technology Wuhan430070 China

Two-dimensional (2D) phase-transition memristors have demonstrated transformative potential for neuromorphic computing, yet challenges like high power consumption, limited endurance, and crystal damage from external ion intercalation persist. Here, we introduce a novel 2D phase-transition memristor leveraging a paradigm-shifting mechanism by exploiting the ultrafast intrinsic Cu+ ion migration within Cu2S. This approach eliminates the need for external ion insertion, significantly reducing crystal damage and enabling exceptional cycling stability with over 400 DC cycles and 500 pulse cycles. The susceptible monoclinic-tetragonal phase-transition induced by intrinsic Cu+ migration achieves an unprecedented SET power consumption of 1 μW at 100 mV, significantly lower in currently reported phase-transition memristors. To further demonstrate the potential of intrinsic ion migration-induced (IIM) memristor, we simulated an IIM memristor crossbar array for image preprocessing in gesture recognition with a high SSIM value of 0.94, showcasing its potential for scalable neuromorphic hardware. This work establishes a new paradigm in low-power, high-performance phase-transition memristors, advancing their practical application in next-generation computing. © 2025 Science China Press

关键词： Memristor Neuromorphic device Two-dimensional materials

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