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Facet specific electron conduction in pentavalent (W5+) WO3 drives superior photocatalytic CO2 reduction in (002) plane

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Separation and Purification technology 2025年 370卷

作者： Kamal, Muhammad Rizwan Rahman, Mohammad Z. Aligayev, Amil Liu, Min Zhong, Li Xia, Pengfei Li, Yueheng Ruan, Yue Xiang, Xia Ismail, Pir Muhammad Alam, Qaisar Ismail, Ahmed Zahid, Muhammad Wu, Xiaoqiang Alodhayb, Abdullah N. Huang, Qing Khan, Raj Wali Raziq, Fazal Ali, Sharafat Qiao, Liang School of Physics University of Electronic Science and Technology of China Chengdu610054 China Institute for Advanced Study Chengdu University Chengdu610106 China Science Island Branch of Graduate School University of Science and Technology of China Hefei230026 China NOMATEN Centre of Excellence National Centre for Nuclear Research Swierk/Otwock05-400 Poland SEU-FEI Nano-Pico Center Key Laboratory of MEMS of Ministry of Education Southeast University Nanjing210096 China University of Electronic Science and Technology of China Huzhou313001 China Energy Water and Environment Lab College of Humanities and Sciences Prince Sultan University Riyadh11586 Saudi Arabia School of Mechanical Engineering Chengdu University Chengdu610106 China Research Chair for Tribology Surface and Interface Sciences Department of Physics and Astronomy College of Science King Saud University Riyadh11451 Saudi Arabia National Water and Energy Center United Arab Emirates University Al Ain15551 United Arab Emirates

This article reports a concept of heat-induced topological modifications of non-layered WO3 followed by successful synthesis of oxygen-vacant more-porous nanosheets with exposed active (002) facet. Experimental measurements and Density Functional Theory (DFT) calculations have revealed that the photoexcited electrons are found to accumulate preferentially on (002) facet to yield enhanced electron conduction, and consequently, strengthen the reduction potential as active catalytic sites for photocatalytic CO2 reduction. Owing to these beneficial properties, the more-porous nanosheets of WO3 with (002) facet have exhibited superior performance than that of less-porous nanosheets of WO3 with (220) facet and bulk WO3 with (205) facet. This study therefore provides a new understanding of regulating physical, optical, and electronic properties through intricate atomic structure modulation of WO3, and may find widespread application in optoelectronics, sensors, and energy conversion. © 2025 Elsevier B.V.

关键词： Nanosheets

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Analysis and optimizations of macro-pulse performances for a constructed high-power beam injector with a compact layout

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Nuclear engineering and technology 2025年

作者： H. Hu Y. Wang H.J. Xu Y.F. Zeng T.N. Hu H.M. Wang G.Y. Feng Y.J. Pei State Key Laboratory of Advanced Electromagnetic Technology School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan 430074 China Chengdu Aircraft Design & Research Institute Aviation Industry Corporation of China Chengdu 610091 China National Synchrotron Radiation Laboratory University of Science and Technology of China Hefei 230029 China

The performance of terahertz (THz) radiation from free electron lasers (FEL) depends on the consistency of electron bunches within the macro-pulse, not just the properties of individual bunches. In accelerator-based injectors, bunch-to-bunch deviations often arise due to transient beam loading effects. This study investigates the impact of such transient responses on macro-pulse inconsistencies by combining theoretical analysis and particle simulations, using the FEL injector at Huazhong University of science and technology (HUST) as a case study. The goal is to optimize macro-pulse performance without requiring additional equipment or facility upgrades. To achieve this, an improved multi-objective optimization algorithm, NSGA-III, is introduced to optimize RF injection timing and phase settings, targeting energy and phase consistency within the macro-pulse and stable energy output. The approach is validated through extensive virtual simulations, which demonstrate its effectiveness in providing optimal initial settings for the HUST-FEL injector’s macro-pulse. Subsequent online experiments conducted on this injector have preliminarily validated the reliability of the proposed method as well. The results are applicable to other multi-bunch/macro-pulse injectors, offering a cost-effective solution for efficient beam commissioning and engineering implementation.

关键词： Beam injector transient beam loading free electron laser linac beam dynamics

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Preparation of disulfide bond-rich porous hypercrosslinked polymers for the efficient adsorption of trace methylmercury at ppb levels in aqueous solutions

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Chemical engineering Journal 2025年 516卷

作者： Liu, Huayu Liu, Lijia Wang, Yudan Gao, Fanshuai Liu, Yawen Key Laboratory of Superlight Materials & Surface Technology Ministry of Education Institute of Advanced Marine Materials College of Materials Science and Chemical Engineering Harbin Engineering University Harbin 150001 China Yantai Research Institute of Harbin Engineering University Yantai 264006 China

Methylmercury (CH3Hg+) is present at low levels in natural waters and is difficult to remove. Here, an organic hypercrosslinked porous polymer material (HCP-DS) enriched with disulfide bonds was designed and synthesiz... 详细信息

Methylmercury (CH₃Hg⁺) is present at low levels in natural waters and is difficult to remove. Here, an organic hypercrosslinked porous polymer material (HCP-DS) enriched with disulfide bonds was designed and synthesized from dibenzyl disulfide via a Friedel-Crafts alkylation reaction. The resulting material demonstrated a high efficiency to remove methylmercury from water at ppb levels. The adsorption capacity reached 1174.765 μg·g⁻¹ at an initial methylmercury concentration of 500 μg·L⁻¹. Notably, the material maintained excellent adsorption capacity across a wide pH range, in the range of pH = 5–12, the removal rate (R) of methylmercury can get over 95.56 %, even at pH = 2 or 13 it could get the removal rate over 85.08 %. HCP-DS proves great environmental adaptability, even in the presence of other metal cations or high ionic strength in aqueous environments, HCP-DS exhibited robust adsorption of trace methylmercury. Furthermore, the material demonstrated excellent reusability, maintaining high performance over five adsorption–desorption cycles. Importantly, HCP-DS effectively adsorbed methylmercury in the presence of organic matter (R > 89.24 %), it also performs an excellent capacity to remove methylmercury in a variety of natural water environments such as seawater, surface water, and groundwater underscoring its potential for practical applications in water purification. © 2025 Elsevier B.V.

关键词： Adsorption Disulfide bond Hypercrosslinked polymer Methylmercury Porous

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Preparation of hypercrosslinked porous polymer modified with paired thiol groups via in-situ disulfide bond cleavage for the rapid and efficient adsorption of mercury ions from water

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Separation and Purification technology 2025年 375卷

作者： Huayu Liu Yahui Si Lijia Liu Yudan Wang Fanshuai Gao Yawen Liu Key Laboratory of Superlight Materials & Surface Technology Ministry of Education Institute of Advanced Marine Materials College of Materials Science and Chemical Engineering Harbin Engineering University Harbin 150001 China Yantai Research Institute of Harbin Engineering University Yantai 264006 China

A hypercrosslinked porous polymer (HCP) containing disulfide bonds (HCP-DS) was synthesized via a Friedel-Crafts alkylation reaction of benzyl disulfide. Subsequently, in-situ cleavage of the disulfide bonds by tris(2-carboxyethyl)phosphine hydrochloride in HCP-DS enhanced the specific surface area of the HCP, and resulted in numerous paired thiol groups in the HCP (HCP-PSH). As a reference, benzyl mercaptan was hypercrosslinked to produce HCP-ISH that thiol groups irregularly distributed in the HCP. HCP-PSH exhibited an impressive adsorption capacity and fast adsorption speed. The capacity reached 2221.2 mg·g −1 when [Hg 2+ ] = 600 mg·L −1 . The adsorption could rapidly reach 96 % of its equilibrium capacity within just 10 min. HCP-PSH showed great adsorption capacity in a wide pH range, even pH = 0.5, it also showed high adsorption capacity. Additionally, HCP-PSH demonstrated excellent selectivity for mercury ions, even in the presence of competing metal ions, underscoring its potential for practical applications. The material also showed outstanding reusability, maintaining its performance over five adsorption/desorption cycles. HCP-PSH demonstrated superior adsorption performance compared to HCP-ISH without the paired thiol groups in the same adsorption condition, indicating that paired thiols are more effective for mercury ion adsorption.

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Origin of enhanced stability in thiocyanate substituted α-FAPbI3 analogues

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science China Chemistry 2019年第7期62卷 866-874页

作者： Zhuo Xu Ming Chen Shengzhong (Frank) Liu Key Laboratory of Applied Surface and Colloid Chemistry National Ministry of EducationShaanxi Key Laboratory for Advanced Energy DevicesShaanxi Engineering Lab for Advanced Energy TechnologyInstitute for Advanced Energy MaterialsSchool of Materials Science and Engineering Shaanxi Normal University Xi'an 710119 China State Key Laboratory of Catalysis Dalian National Laboratory for Clean Energy Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 China

In the past few years,hybrid perovskites have emerged as the most promising photovoltaic materials due to their excellent optoelectronic properties,and easy fabrication ***,the long-term stability is still the main obstacle for their commercial ***,thiocyanate-doped hybrid perovskites have shown enhanced stability and impressive efficiency,but the reason is still ***,we discussed the enhanced stability of SCN-substituted pseudocubic FABX3(B=Pb^2+,Sn^2+;X=I^–,Br^–,and Cl^–)based on the density functional *** a series of calculations of Bader charge transfer,vacancy formation energies of different kinds of vacancies,decomposition enthalpy,phonon density of states,and ab initio molecular dynamics simulation,we conclude that the incorporation of SCN–can stabilize pseudocubic FABX3,and attribute the enhanced stability mainly to two factors:(1)the strong interaction between Pb^2+/Sn^2+and SCN^–,as well as the strong hydrogen bonding between FA+and X^–/SCN^–,and(2)the structural tilting induced by the incorporation of SCN^–.These findings provide alternative method for tuning the poor stability of pseudocubic FABX3,as well as for obtaining high-performance solar cells.

关键词： thiocyanate stability formamidinium perovskites density-functional theory

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Research progress of p-type Fe-based skutterudite thermoelectric materials

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Frontiers of Materials science 2021年第3期15卷 317-333页

作者： Xin TONG Zhiyuan LIU Jianglong ZHU Ting YANG Yonggui WANG Ailin XIA Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials(Ministry of Education) Anhui University of TechnologyMaanshan 243002China School of Materials Science and Engineering Anhui University of TechnologyMaanshan 243002China

Filled skutterudite is currently one of the most promising intermediate-temperature thermoelectric(TE)materials,having good thermoelectric transport performance and excellent mechanical *** the preparation of high-efficiency filled skutterudite TE devices,it is important to have p-and n-type filled skutterudite TE materials with matching ***,the current TE properties of p-type Fe-based filled skutterudite materials are worse than n-type filled skutterudite ***,how to obtain high-performance p-type Fe-based filled skutterudite materials is the key to preparation of high-efficiency skutterudite-based TE *** review summarizes some methods for optimizing the thermal transport performance of p-type filled skutterudite materials at the atomic-molecular and nano-mesoscopic scale that have been used in recent *** methods include doping,multi-atom filling,and use of low-dimensional structure and of *** addition,the synergistic optimization methods of the electrical and thermal transport parameters and advanced preparation technologies of p-type filled skutterudite materials in recent years are also briefly *** optimizational methods and advanced preparation technologies can significantly improve the TE properties of p-type Fe-based filled skutterudite materials.

关键词： p-type Fe-based filled skutterudite lattice thermal conductivity synergistic optimization preparation technology thermoelectric property

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Enhancing the high-cycle fatigue performance of GH4169 alloy by eliminating structural stress concentration through high-energy impact composite modification

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Fundamental Research 2025年

作者： Qiang Wang Guoxin Lu Ayder Nabiev Oday I. Abdullah Zhong Ji Zhong Chen Aviation Key Laboratory of Science and Technology on Advanced Corrosion and Protection for Aviation Material AECC Beijing Institute of Aeronautical Materials Beijing 100095 China MOE Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Shandong University Jinan 250061 China Institute of Mechanics and Seismic Stability of Structures of the Academy of Sciences of the Republic of Uzbekistan Department of Theory of Mechanisms and Machines Tashkent 100125 Uzbekistan Department of Energy Engineering College of Engineering University of Baghdad Baghdad Iraq Jiangsu Key Laboratory of Advanced Manufacturing Technology Huaiyin Institute of Technology Huai’an 223001 China

Despite the advancements of traditional surface treatments like shot peening (SP) and laser shock peening (LSP) in enhancing the fatigue life of GH4169 superalloy, these techniques remain limited, particularly under high-stress concentration conditions. This study introduces a novel high-energy impact composite modification method that integrates SP and LSP to comprehensively address the fatigue strength sensitivity to stress concentration, a persistent issue for GH4169 in high-cycle fatigue applications. For the modified specimens, the fatigue limit under high-stress concentration conditions of Kt  = 3 increased from 215 MPa to 517 MPa, more than doubling. Compared to grinding, composite modification shifts fatigue crack initiation from the surface to subsurface regions, demonstrating superior fatigue resistance. The high-intensity surface modification eliminates structural stress concentration as the primary factor determining the fatigue life of the material. The concentrated stress at the carbide phase interfaces within the material, which cannot be sufficiently weakened by residual compressive stress, becomes the new weak point. The study concludes that high-energy impact composite modification offers a viable method to enhance the durability and performance of GH4169 superalloys in demanding applications.

关键词： High-energy modification GH4169 Residual stress High-cycle fatigue

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Uniformly Dispersed Carbide Reinforcements in the Medium-Entropy High-Speed Steel Coatings by Wide-Band Laser Cladding

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Acta Metallurgica Sinica(English Letters) 2020年第8期33卷 1145-1150页

作者： Bang Dou Hui Zhang Jia-Hao Zhu Ben-Qi Xu Zi-Yi Zhou Ji-Li Wu Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials(Ministry of Education) Anhui University of TechnologyMa'anshan 243002China School of Materials Science and Engineering Anhui University of TechnologyMa'anshan 243002China School of Materials Science and Engineering Jiangsu UniversityZhenjiang 212013China

A medium-entropy high-speed steel(ME-HSS)coating with the 76 at.%of Fe and multiple alloying elements was prepared by the wide-band laser *** with the commercial W6 Mo5 Cr4 V2(M2)HSS coating which contains a large number of network lamellar M2 C-type carbides along the grain boundaries,the presented ME-HSS coating has a high quantity of fi ner and more uniformly dispersed M C-type carbides;on the other hand,the coating has less retained austenite and much lower brittleness as well as similar secondary hardening eff ect and tempering hardness.

关键词： High-speed steel Medium-entropy alloy Phase selection Laser cladding

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Fabrication and electrical characteristics of flash-sintered SiO_(2)-doped ZnO-Bi_(2)O_(3)-MnO_(2) varistors

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Journal of advanced Ceramics 2020年第6期9卷 683-692页

作者： Pai PENG Yujun DENG Jingpeng NIU Liyi SHI Yunzhu MEI Sanming DU Juan LIU Dong XU Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials(Anhui University of Technology) Ministry of EducationMa'anshan 243002China Key Laboratory of Etallurgical Emission Reduction&Resources Recycling(Anhui University of Technology) Ministry of EducationMa'anshan 243002China Research Center of Nano Science and Technology Shanghai UniversityShanghai 200444China National United Engineering Laboratory for Advanced Bearing Tribology Henan University of Science and TechnologyLuoyang 471023China

The dense ZnO-Bi_(2)O_(3)-MnO_(2)(ZBMS)varistors for x=0,1,2,3 wt% were fabricated by flash sintering method under the low temperature of 850℃ within 2 *** sample temperature was estimated by a black body radiation model in the flash sintering *** crystalline phase assemblage,density,microstructure,and electrical characteristics of the flash-sintered ZBMS varistors with different SiO_(2)-doped content were *** to the XRD analysis,many secondary phases were detected due to the SiO_(2) ***,the average grain size decrease with increasing SiO_(2)-doped *** improved nonlinear characteristics were obtained in SiO_(2)-doped samples,which can be attributed to the ion migration and oxygen absorption induced by the doped SiO_(2).The flash-sintered ZBMS varistor ceramics for x=2 wt% exhibited excellent comprehensive electrical properties,with the nonlinear coefficient of 24.5,the threshold voltage and leakage current of 385 V·mm^(-1 )and 11.8μA,respectively.

关键词： flash sintering SiO_(2)additive ZBMS varistors electrical properties

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Anion-Regulated Weakly Solvating Electrolytes for High-Voltage Lithium Metal Batteries

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Energy & Environmental Materials 2023年第6期6卷 259-265页

作者： Zhipeng Jiang Jisheng Mo Chen Li Haiwen Li Qingan Zhang Ziqi Zeng Jia Xie Yongtao Li School of Materials Science and Engineering&Low-Carbon New Materials Research Center Anhui University of TechnologyMaanshan 243002China Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials of Ministry of Education Anhui University of TechnologyMaanshan 243002China State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074China Hefei General Machinery Research Institute Hefei 230031China

Development of advanced high-voltage electrolytes is key to achieving high-energy-density lithium metal batteries(LMBs).Weakly solvating electrolytes(WSE)can produce unique anion-driven interphasial chemistry via altering the solvating power of the solvent,but it is difficult to dissolve the majority of Li salts and fail to cycle at a cut-off voltage above 4.5 ***,we present a new-type WSE that is regulated by the anion rather than the solvent,and the first realize stable cycling of dimethoxyethane(DME)at 4.6 V without the use of the“solvent-in-salt”*** relationships between the degree of dissociation of salts,the solvation structure of electrolytes,and the electrochemical performance of LMBs were systematically *** found that LiBF_(4),which has the lowest degree of dissociation,can construct an anion-rich inner solvation shell,resulting in anion-derived anode/cathode *** to such unusual solvation structure and interphasial chemistry,the Li-LiCoO_(2)full cell with LiBF_(4)-based WSE could deliver excellent rate performance(115 mAh g^(-1)at 10 C)and outstanding cycling stability even under practical conditions,including high loading(10.7 mg cm^(-2)),thin Li(50μm),and limited electrolyte(1.2μL mg^(-1)).

关键词： high-voltage LiCoO_(2) lithium metal batteries solvation structure weakly solvating electrolyte

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