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Asymmetric wettability channel of membranes for water and oil concurrent recovery from emulsions

Science China materials 2025年

作者： Lu Tie Xiaoping Zheng Department of Applied Physics School of Science Lanzhou University of Technology State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals School of Materials Science and Engineering Lanzhou University of Technology

Oily wastewater is a global water pollutant, while trace water in transportation fuels/lubricants threatens vehicle safety. advanced oil-water separation technologies are crucial for mitigating water pollution and upgrading oil purity. Conventional separation methods like centrifugation(density-dependent [1]) and flocculation(chemical additives, secondary pollution [2]) have limitations, whereas membrane filtration is widely used in the oil-water separation [3,4].

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1800℃下具有优异高强度且含氧化物杂质的高熵二硼化物陶瓷

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Science China materials 2023年第5期66卷 2061-2070页

作者：柳洁杨青青邹冀王为民王新刚傅正义 State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Hubei Longzhong Laboratory Xiangyang 441000China Shanghai Institute of Ceramics Chinese Academy of SciencesShanghai 201899China

以硼热/碳热还原合成高熵二硼化物粉体为原料,在2000℃/单轴加压50 MPa条件下,经10分钟放电等离子烧结,成功制备了含有~2 vol%的氧化物和~1 vol%气孔的高熵(Ti_(0.2)Zr_(0.2)Nb_(0.2)Hf_(0.2)Ta_(0.2))B_(2)陶瓷(HEBs).经研究确认,其中... 详细信息

以硼热/碳热还原合成高熵二硼化物粉体为原料,在2000℃/单轴加压50 MPa条件下,经10分钟放电等离子烧结,成功制备了含有~2 vol%的氧化物和~1 vol%气孔的高熵(Ti_(0.2)Zr_(0.2)Nb_(0.2)Hf_(0.2)Ta_(0.2))B_(2)陶瓷(HEBs).经研究确认,其中残留氧化物是固溶少量硼和碳的m-(Hf,Zr)O_(2).室温下HEBs的弹性模量、维氏硬度和断裂韧性分别为508.5 GPa、17.7±0.4 GPa和4.2±0.2 MPa m^(1/2).烧结得到的HEBs具有优良的抗弯强度,特别是其高温强度.HEBs在室温、1600和1800℃下的四点抗折强度分别为400.4±47.0 MPa、695.9±55.9 MPa和751.6±23.2 MPa.对1800℃下断裂的HEBs样品进行了失效分析,在其拉伸和断裂面附近区域,仅在裂纹尖端和孔隙边缘发现了数量有限的位错线的存在,没有观察到位错运动的痕迹.本研究首次报道了高熵二硼化物陶瓷的高温强度,发现其强度直至1800℃并无衰减,并对其高温下的强韧化机制进行了有益的探讨.

关键词： borides high-entropy ceramics high-temperature strength mechanical properties microstructure

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Ni nanoparticles anchoring on vacuum treated Mo_(2)TiC_(2)T_(x) MXene for enhanced hydrogen evolution activity

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Chinese Journal of Structural Chemistry 2023年第10期42卷 37-45页

作者： Xiangyuan Zhao Jinjin Wang Jinzhao Kang Xiaomei Wang Hong Yu Cheng-Feng Du State Key Laboratory of Solidification Processing Center of Advanced Lubrication and Seal MaterialsSchool of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi'an710072China Northwestern Polytechnical University Chongqing Technology Innovation Center Chongqing400000China

MXenes with metal nanoparticles(NPs)immobilized on their surface are greatly desired for high-performance electrocatalysts,while the homogeneous nucleation and growth of NPs are still ***,a new method has been proposed for uniformly anchoring Ni NPs on the altered surficial *** pre-vacuum treatment on Mo_(2)TiC_(2)T_(x)(oMX)not only removes the surficial terminal groups but also induces surface oxidation ***,the nucleation and growth behaviors of Ni NPs on the oMX are altered in the hydrothermal reaction,which results in a grain-size reduction of more than 50%as well as homogeneous ***,the oxidized surface contributes a strong coupling between oMX and Ni NPs via Ni−O binging,which endows the Ni@oMX hybrid with the lowest overpotential and high durability over 75 h in 1 M KOH solution for electrocatalytic hydrogen evolution reaction(HER).

关键词： Nickel nanoparticles MXene Hybrid Electrocatalysts Hydrogen evolution reaction

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High-Performance Ag_(2)Se/Methyl Cellulose Thermoelectric Composites for Flexible Power Generators

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Energy Material Advances 2024年第1期5卷 275-282页

作者： Zuo Xiao Qiufeng Meng Yong Du Ping Wei Jie Qin Jingyu Chen Zhongchang Wang Per Eklund School of Materials Science and Engineering Shanghai Institute of Technology100 Haiquan RoadShanghai 201418China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China The Center of Functional Materials for Working Fluids of Oil and Gas Field School of New Energy and MaterialsSouthwest Petroleum UniversityChengdu 610500China Sichuan Engineering Technology Research Center of Basalt Fiber Composites Development and Application State Key Laboratory of Oil and Gas Reservoir Geology and ExploitationSouthwest Petroleum UniversityChengdu 610500SichuanChina International Iberian Nanotechnology Laboratory Av.Mestre Jose Veiga s/n4715-330 BragaPortugal Thin Film Physics Division Department of PhysicsChemistry and Biology(IFM)Linköping UniversitySE-58183 LinköpingSweden

Flexible thermoelectric generators(FTEGs)offer a promising solution for powering wearable electronics,while their practical applications are mainly obstructed by the moderate properties of flexible thermoelectric(TE)***,flexible Ag_(2)Se nanowire(NW)/methyl cellulose(MC)composite films were developed via facile screen-printing technology combined with cold pressing and annealing treatment,and a highest power factor of 1,641.58μW m^(-1)K^(-2)at 360 K was *** reasons for the high TE performance of the Ag_(2)Se NW/MC composite films were because,after the annealing treatment,the Ag_(2)Se NWs were sintered to form conductive network structures,the crystallinity of Ag_(2)Se was markedly enhanced,and the content of insulating phase MC in the composite film was *** Ag_(2)Se NW/MC composite film held appreciable flexibility,as its room-temperature power factor(1,312.08μW m^(-1)K^(-2))can retain~93%after bending for 1,000 cycles at a radius of 4 ***,the assembled FTEG consisting of 4 strips can generate a maximal power density of 3.51 W m^(-2)at a temperature difference of 14.1 *** results open an effective and large-scale strategy for fabricating high-performance flexible TE materials and energy-harvesting devices.

关键词： annealing treatment cold pressing Ag Se nanowires methyl cellulose flexible thermoelectric generators ftegs offer thermoelectric composites flexible thermoelectric generators power factor

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Ultrasensitive Frequency Shifting of Dielectric Mie Resonance near Metallic Substrate

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Research 2022年第4期2022卷 155-163页

作者： Chuanbao Liu Changxin Wang Junhong Chen Yanjing Su Lijie Qiao Ji Zhou Yang Bai School of Materials Science and Engineering University of Science and Technology BeijingBeijing 100083China Beijing Advanced Innovation Center for Materials Genome Engineering Institute for Advanced Materials and TechnologyUniversity of Science and Technology BeijingBeijing 100083China State Key Laboratory of New Ceramics and Fine Processing Tsinghua UniversityBeijing 100084China

Dielectric resonators on metallic surface can enhance far-field scattering and boost near-field response having promising applications in nonlinear optics and reflection-type ***,the dependence of gap size between dielectric resonator and metallic surface on Mie resonant frequency is complex and desires a comprehensive physical ***,we systematically study the effect of metallic substrate on the magnetic dipole(MD)resonant frequency at X-band by placing a high permittivity CaTiO_(3) ceramic block on metallic substrate and regulating their gap *** simulated and experimental results show that there are two physical mechanisms to codetermine the metallic substrate-induced MD *** greatly enhanced electric field pair in the gap and the coupling of MD resonance with its mirror image are decisive for small and large gaps,respectively,making the MD resonant frequency present an exponential blue shift first and then a slight red shift with increasing gap ***,we use the two mechanisms to explain different frequency shifting properties of ceramic sphere near metallic ***,taking advantage of the sharp frequency shifting to small gaps,the ceramic block is demonstrated to accurately estimate the thickness or permittivity of thin film on metallic substrate through a governing equation derived from the method of symbolic *** believe that our study will help to understand the resonant frequency shifting for dielectric particle near metallic substrate and give some prototypes of ultrasensitive detectors.

关键词： metallic ceramic shifting

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Unraveling the reaction mechanisms of electrode materials for sodiumion and potassium‐ion batteries by in situ transmission electron microscopy

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Interdisciplinary materials 2022年第2期1卷 196-212页

作者： Hong Wang Fang Liu Ruohan Yu Jinsong Wu Nanostructure Research Center(NRC) Wuhan University of TechnologyWuhanHubeiChina State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Materials Science and EngineeringWuhan University of TechnologyWuhanHubeiChina School of Mathematics and Physics Jingchu University of TechnologyJingmenHubeiChina

Sodium ion batteries(SIBs)and potassium ion batteries(PIBs)have caught numerous attention due to the low cost and abundant availability of sodium and ***,their power density,cycling stability and safety need further improvement for practical *** on the reaction mechanisms and structural degradation when cycling are of great *** situ transmission electron microscopy(TEM)is one of the most significant techniques to understand and monitor electrochemical processes at an atomic scale with real-time *** this review,the current progress in unraveling reaction mechanisms of electrode materials for SIBs and PIBs via in situ TEM is ***,the importance of in situ TEM is ***,based on the three types of electrochemical reaction,i.e.,intercalation reac-tion,conversion reaction and alloying reaction,the structural evolution and reaction kinetics at atomic resolution,and their relation to the electrochemical performance of electrode materials are reviewed and described in ***-nally,future directions of in situ TEM for SIBs and PIBs are ***,the in‐depth understanding revealed by in situ TEM will give an instructive guide in rational design of electrode materials for high performance electrode materials of SIBs and PIBs.

关键词： in situ transmission electron microscopy potassium ion batteries sodiumion batteries

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Deposition of IrO_(2) on Nb-doped SnO_(2) as Electrocatalysts for Oxygen Evolution Reactions

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Journal of Wuhan University of technology(materials Science) 2022年第6期37卷 1180-1184页

作者： SONG Xuyan HE Yunlu PENG Sanwen WANG Bo DONG Ping TANG Haolin YU Jun China Tobacco Hubei Industrial Co. LtdWuhan 430051China China Tobacco Hubei Industrial Cigarette Materials Co. LtdWuhan 430051China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China

We reported sol-gel-derived Nb-doped SnO_(2) which is an effective catalyst carrier for deposition of IrO_(2),and the electrocatalytic activity of the synthesized catalysts for OER was *** is found that the doping of Nb can refine the SnO_(2) crystal grains and improve the electrical conductivity of SnO_(2).When the doping amount of Nb is 7%,the electrical conductivity of Nb-SnO_(2) reaches a maximum value of 3.54 S/*** the increase in the loading amount of IrO_(2),the electrocatalytic activity towards OER of the thus-synthesized catalysts is improved,reaching a comparable OER activity with pristine IrO_(2) with the loading content of about 44wt%.

关键词： electrolysis iridium oxygen evolution Nb-SnO_(2)

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Enhancement and recovery of photoluminescence and stability by multifunctional etching ligands treatment for perovskite nanocrystals

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Journal of Energy Chemistry 2023年第1期76卷 495-502,I0013页

作者： Yang Zhao Haipeng Zeng Xueqing Cai Yingshan Zhou Yangming Jiang Xin Zheng Lin Li Shujing Zhang Long Luo Weixi Li Xiaoru Zhang Ranran Liu Wenxi Liang Rui Guo Xiong Li Michael Gratzel Center for Mesoscopic Solar Cells Wuhan National Laboratory for OptoelectronicsHuazhong University of Science and TechnologyWuhan 430074HubeiChina State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile UniversityWuhan 430073HubeiChina State Key Laboratory of Functions and Applications of Medicinal Plants Guizhou Medical University Guiyang 550014GuizhouChina

Perovskite nanocrystals(PNCs)have recently become promising optoelectronic materials due to their excellent photophysical ***,the highly dynamic binding state between ligands and the surface of PNCs has severely restricted their luminescent properties and *** this work,1,3-bisbenzyl-2-oxoimidazolidine-4,5-dicarboxylic acid(cycle acid,CA)is introduced as both an etchant and a ligand upon post-synthetic surface treatment of *** removing the imperfect octahedrons[Pb X_(6)]^(4-)and passivating the surface defects synergistically,this treatment improves photoluminescence quantum yields from 76%to 95%and enhances the stability of PNCs against polar solvent,moisture,heat,and ***,CA can effectively and instantly recover the luminescence emission for aged *** a result,the CA-Cs Pb Br_(3)PNCs and CA-Cs Pb IxBr_(3-x)PNCs are applied as color-converting layers on a blue LED chip for warm white light-emitting diodes(WLEDs)with a color coordinate of(0.41,0.40).Importantly,the CA-based WLED device exhibits superior stability in operational conditions.

关键词： Perovskite nanocrystals Synergistic effect Emission recovery White light emitting diodes Stability

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Disordered Rocksalts with Lattice Oxygen Activation as Efficient Oxygen Evolution Electrocatalysts

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Transactions of Tianjin University 2023年第4期29卷 304-312页

作者： Zhengli Huan Haipeng Fu Xuerong Zheng Huiming Ji School of Materials Science and Engineering Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of EducationTianjin UniversityTianjin 300072China Key Laboratory of Electromagnetic Processing of Materials Ministry of EducationNortheastern UniversityShenyang 110819China State Key Laboratory of Marine Resource Utilization in South China Sea School of Materials Science and EngineeringHainan UniversityHaikou 570228China

The lattice oxygen oxidation mechanism(LOM)provides an efficient pathway for accelerating the oxygen evolution reaction(OER)in certain electrocatalysts by activating and involving lattice oxygen in the catalytic OER *** investigated the potential of disordered rocksalts as catalysts for accelerating the OER through the LOM process,leveraging their unique metastable Li-O-Li bond *** calculations were employed to predict the catalytic pathways and activities of disordered rocksalts(DRX),such as Li_(1.2)Co_(0.4)Ti_(0.5)O_(2)(LCTO).The results revealed that benefiting from the unhybridized Li-O electronic orbitals and the resulting metastable states of Li-O-Li bonds in DRX,LCTO exhibited a typical LOM pathway,and the lattice oxygen was easily activated and participated in the *** experimental results showed that LCTO exhibited a remarkable pH-dependent OER activity through the LOM pathway,with an overpotential of 241 mV at a current density of 10 mA/cm^(2),and excellent long-term *** work provides a novel chemical space for designing highly active and stable OER electrocatalysts by leveraging the LOM reaction pathway.

关键词： Lattice oxygen oxidation Disordered rocksalts Oxygen evolution reaction Electrocatalysts

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Electromagnetic Functions Modulation of Recycled By-Products by Heterodimensional Structure

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Nano-Micro Letters 2025年第6期17卷 264-278页

作者： Ze Nan Wei Wei Zhenhua Lin Ruimei Yuan Miao Zhang Jincheng Zhang Jianyong Ouyang Jingjing Chang Hejun Li Yue Hao State Key Laboratory of Wide-Bandgap Semiconductor Devices and Integrated Technology School of MicroelectronicsXidian UniversityXi’an 710071People’s Republic of China State Key Laboratory of Solidification Processing Shaanxi Province Key Laboratory of Fiber Reinforced Light Composite MaterialsCarbon/Carbon Composites Research CenterNorthwestern Polytechnical UniversityXi’an 710072People’s Republic of China Advanced Interdisciplinary Research Center for Flexible Electronics Xidian UniversityXi’an 710071People’s Republic of China Department of Materials Science and Engineering National University of Singapore7 Engineering Drive 1Singapore 117574Singapore

One of the significant technological challenges in safeguarding electronic devices pertains to the modulation of electromagnetic(EM)wave jamming and the recycling of defensive *** synergistic effect of heterodimensional materials can effectively enable the manipulation of EM waves by altering the *** we propose a novel approach for upcycling by-products of silver nanowires that can fabricate shape-tunable aerogels which enable the modulation of its interaction with microwaves by heterodimensional structure of ***-product heterodimensionality was used to design EM-wave-jamming-dissipation structures and therefore two typical tunable aerogel forms were *** first tunable form was aerogel film,which shielded EM interference(EMI shielding effectiveness(EMI SE)>89 dB)and the second tunable form was foam,which performed dual EM functions(SE>30 dB&reflective loss(RL)<-35 dB,effective absorption bandwidth(EAB)>6.7 GHz).We show that secondary recycled aerogels retain nearly all of their EM protection properties,making this type of closed-loop cycle an appealing *** findings pave the way for the development of adaptive EM functions with nanoscale regulation in a green and closed-loop cycle,and they shed light on the fundamental understanding of microwave interactions with heterodimensional structures.

关键词： Silver nanowires Electromagnetic shielding Microwave absorption Recycled aerogels

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