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ZnO-based micromotors fueled by C02:the first example of self-reorientation-induced biomimetic chemotaxis

国家科学评论（英文版） 2021年第11期8卷 98-105页

作者： Fangzhi Mou Qi Xie Jianfeng Liu Shengping Che Lamya Bahmane Ming You Jianguo Guan State Key Laboratory of Advanced Technology for Materials Synthesis and Processing International School of Materials Science and EngineeringWuhan University of TechnologyWuhan 430070China

Synthetic chemotactic micro/nanomotors are envisioned to actively'seek out'targets by following specific chemicals,but they are mainly powered by bioincompatible fuels and only show pseudochemotaxis (or advanced chemokinesis) due to their weak self-reorientation *** we demonstrate that synthetic ZnO-based Janus micromotors can be powered by the alternative biocompatible fuel of CO2,and further provide the first example of self-reorientation-induced biomimetic chemotaxis using *** ZnO-based micromotors are highly sensitive to dissolved CO2 in water,which enables the corrosion of ZnO to continuously occur by providing H+ through ***,they can autonomously move even in water exposed to air based on ***,they can sense the local CO2 gradient and perform positive chemotaxis by self-reorientations under the phoretic *** discovery opens a gate to developing intelligent micro/nanomotors powered by,and sensitive to,biocompatible atmospheric or endogenous gaseous chemicals for biomedical and environmental applications.

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碱性和酸性条件下均稳定的高效氧电催化剂:具有多活性中心的多孔纳米片复合材料

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Science China materials 2023年第4期66卷 1407-1416页

作者：夏雁楠程义王锐孟子寒迈耶昆庭赵川张海宁罗任李扬唐浩林 State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Xianhu Hydrogen ValleyFoshan 528200China Hunan Provincial Key Laboratory of Nonferrous Value-added Metallurgy Central South UniversityChangsha 410083China School of Chemistry The University of New South WalesSydneyNew South Wales2052Australia

可逆的氧还原反应(ORR)和氧析出反应(OER)需要多种类型的活性中心来缓冲质子耦合/解耦的四电子过程.本文通过一种简单环保的熔融NaCl模板法合成了碳包覆FeNi合金、金属-N物种和N缺陷共掺杂的多孔纳米片(FeNi-N/PCN).得到的FeNi-N/PCN作... 详细信息

可逆的氧还原反应(ORR)和氧析出反应(OER)需要多种类型的活性中心来缓冲质子耦合/解耦的四电子过程.本文通过一种简单环保的熔融NaCl模板法合成了碳包覆FeNi合金、金属-N物种和N缺陷共掺杂的多孔纳米片(FeNi-N/PCN).得到的FeNi-N/PCN作为氧电催化剂在碱性(E_(1/2)为0.88 V_(RHE),E_(j=10)为1.57 V_(RHE))和酸性介质(E_(1/2)为0.78 V_(RHE),E_(j=10)为1.76 V_(RHE))中均表现出优异的ORR和OER性能.此外,该FeNi-N/PCN催化剂在锌空气电池中表现出224 m W c m^(-2)的功率密度和691 m A h g^(-1)的比容量,分别是Pt/RuO_(2)组合的1.34和1.20倍.这些优异的性能可以归因于具有多类型活性位点的层状碳纳米片结构,包括碳包覆FeNi合金、N缺陷和金属-N位点(M–N_(x)).

关键词：碳纳米片 FeNi合金电催化剂锌空气电池氧析出反应多孔纳米片碳包覆酸性介质

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Gallium-based liquid metals for lithium-ion batteries

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Interdisciplinary materials 2022年第3期1卷 354-372页

作者： Bin-Wei Zhang Long Ren Yun-Xiao Wang Xun Xu Yi Du Shi-Xue Dou College of Chemistry and Chemical Engineering Chongqing UniversityChongqingChina Center of Advanced Energy Technology and Electrochemistry Chongqing UniversityChongqingChina Institute for Superconducting and Electronic Materials Australian Institute of Innovative MaterialsUniversity of WollongongNorth WollongongNew South WalesAustralia State Key Laboratory of Advanced Technology for Materials Synthesis and Processing International School of Materials Science and EngineeringWuhan University of TechnologyWuhanChina BUAA-UOW Joint Research Centre and School of Physics Beihang UniversityBeijingChina

Lithium-ion batteries(LIBs)are one of the most exciting inventions of the 20th century and have been widely employed in modern *** have powered many of our electronics,such as laptop computers,smartphones,and even large-scale energy storage *** the development of modern technology,next-generation LIBs with higher energy density are in demand.A number of electrode materials with high theoretical capacity,including Sn,Si,Li metal anode,and S cathode materials,have been ***,they usually suffer from structural or interface failure during cycling,limiting their practical ***-based liquid metals(LMs)possess self-healing capability,fluidity,and metallic advantages so they have been employed as self-healing skeletons or interfacial protective layers to minimize the negative impact of volume expansion or dendritic growth on the electrode ***,the features of Ga-based LMs are briefly discussed to indicate their potential for battery *** addition,recent developments on Ga-based LMs applied in LIBs have been summarized,including from the aspects of anodes,cathodes,and ***,future opportunities and challenges for the development of Ga-based LMs in LIBs are highlighted.

关键词： anode cathode electrolyte gallium-based liquid metals lithium-ion batteries

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Atomic-Scale Mechanisms for Achieving Ultra-High Controllable Electrical Properties in Perovskite Bifeo3

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SSRN 2024年

作者： Lu, Yongshen Chen, Fangze Zhang, Jinyong Ren, Lin Wang, Weimin Zhang, Fan Fu, Zhengyi Hubei Longzhong Laboratory Wuhan University of Technology Xiangyang Demonstration Zone Xiangyang441000 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China

Defect engineering strategies are usually expected to enhance electrical, thermal, and optical functionality while tuning the mechanical properties of materials. Here, we employe atomic-scale imaging to characterize the atomic structural positions in bismuth ferrite (BFO)BFO films and demonstrate the precise positions of quantitatively doped ions within the BFO unit cell. Well-controlled oxygen vacancy contents in BFO crystals were engineered via the accurate introduction of Zr and Mn ions, resulting in extraordinary and stable large-signal ferroelectric properties (Pr ~ 206.2 µC/cm2 and J ~ 2.2×10-9 A/cm2), magnetic properties (4.95 emu/cm3) and a reduced bandgap (Eg = 2.16 eV). Furthermore, we used computational processing to obtain the coupling of the spin and charge redistributions of iron, resulting in changes in spontaneous polarization. An atomic-scale study enhanced our understanding of the effects of chemical modifications on the ferroelectricity/ferromagnetism structure. This defect engineering approach enables us to customize and optimize local ferroelectric and ferromagnetic order parameters, providing a foundation for designing functionalities in a wide range of functional material systems. © 2024, The Authors. All rights reserved.

关键词： Iron compounds

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A durable Ni/La-Y catalyst for efficient hydrogenation of γ-valerolactone into pentanoic biofuels

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Journal of Energy Chemistry 2022年第7期31卷 347-355,I0009页

作者： Jiang He Lu Lin Meng Liu Caixia Miao Zhijie Wu Rui Chen Shaohua Chen Tiehong Chen Yang Su Tao Zhang Wenhao Luo CAS Key Laboratory of Science and Technology on Applied Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina University of Chinese Academy of Sciences Beijing 100049China State Key Laboratory of Heavy Oil Processing and Key Laboratory of Catalysis of CNPC China University of PetroleumBeijing 102249China Key Laboratory of Advanced Energy Materials Chemistry Nankai UniversityTianjin 300350China

Zeolite-supported metal catalysts containing hydrogenation centers and acid sites are promising in the chemoselective hydrogenation of biomass platform molecules into value-added chemicals and *** primary challenge of employing such bifunctional catalysts for biomass conversion lies in catalyst stability in the liquid phase under harsh conditions. Herein, we have prepared a Ni/La-Y nanocatalyst via an improved wet impregnation method. Compared with Ni nanoparticles on H-Y, La addition shows a significantly enhanced stability and performance in the continuous liquid-phase hydrogenation of γ-valerolactone(GVL) into ethyl pentanoate(EP) at 200 ℃ for 1000 h. Complementary characterization studies reveal that La addition in the metal/zeolite catalyst not only efficiently modulates the acid property of the zeolite to alleviate coke formation, but also suppresses zeolite dealumination and metal agglomeration and leaching upon catalysis over a 1000 h period. These findings provide an efficient approach for improving the stability of zeolite-supported bifunctional catalysts, leading to potential application in hydrogen-assisted biomass valorization under the liquid-phase conditions.

关键词： Nickel Zeolite Hydrogenation Stability Biofuel

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Metal-Organic Framework-based Wood Aerogel for Effective Removal of Micro/Nano Plastics

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Chemical Research in Chinese Universities 2022年第1期38卷 186-191页

作者： YOU Dongyu ZHAO Yujuan YANG Weiting PAN Qinhe LI Jiyang Key Laboratory of Advanced Materials of Tropical Island Resources Ministry of EducationSchool of Chemical Engineering and TechnologyHainan UniversityHaikou 570228P.R.China State Key Laboratory of Inorganic Synthesis&Preparative Chemistry College of ChemistryJilin UniversityChangchun 130012P.R.China

The large amount of microplastic pollution in the aquatic environment has been regarded as a major challenge facing the world. Although some traditional water treatment processes can effectively remove microplastics in the millimeter range, research is still needed to solve the problem of removing smaller microplastics. Here, we made a durable zinc metal-organic framework-based composite material ZIF-8@Aerogel by in situ growing ZIF-8 on wood aerogel fibers, which can successfully remove microplastics in simulated water and seawater. The removal efficiencies on micro/nano plastics including poly(1,1-difluoroethylene)(60-110 nm) and polystyrene(90-140 nm) reached 91.4% and 85.8%, respectively. This work is expected to provide a new and efficient way to remove small-sized microplastic particles in the environment.

关键词： Aerogel Metal-organic framework Microplastic removal Environmental remediation

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Light tuning CO/H_(2)composition on Ag:Unraveling CO_(2)mass transfer and electron-phonon coupling in plasmon-enhanced electrocatalysis

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Nano Research 2025年第1期18卷 173-185页

作者： Rui Lin Dong Fan Luca MBerger Thomas Possmayer Yu Zhou Jiexin Zhu Xingbao Chen Wen Luo Lars Allmendinger Andreas Tittl Leonardo de Souza Menezes Guillaume Maurin Shihe Yang and Stefan AMaier Nanoinstitute Munich Faculty of PhysicsLudwig-Maximilians-Universität München80539 MunichGermany Institut Charles Gerhardt Montpellier UMR 5253 CNRS ENSCM UniversitéMontpellierPlace E.Bataillon34090 MontpellierFrance Guangdong Provincial Key Lab of Nano-Micro Material Research School of Advanced MaterialsPeking University Shenzhen Graduate SchoolShenzhen 518055China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Faculty of Chemistry and Pharmacy Ludwig-Maximilians-Universität München81377 MunichGermany Departamento de Física Universidade Federal de Pernambuco50670-901 Recife-PEBrazil School of Physics and Astronomy Monash University Clayton CampusMelbourneVictoria 3800Australia Department of Physics Imperial College LondonSW72AZ LondonUK

Plasmon-enhanced electrocatalysis(PEEC)is an emerging approach to mitigate CO_(2)*** mechanisms behind CO_(2)adsorption and reduction at the catalyst-electrolyte interface in PEEC still need to be further ***,we employ a well-defined Ag nanostructure to elucidate these pivotal *** shining light with wavelengths of 625,525,405 nm on Ag,an adjustable CO/H_(2)ratio from 35 to 1 can be *** reaction pathway changing under plasmonic excitation does not originate from the lowered CO_(2)mass transfer in the vicinity of Ag,as the electrochemical quartz crystal microbalance results unravel that a slightly elevated temperature in bulk electrolyte caused by light irradiation cannot weaken the CO_(2)adsorption at the Ag catalyst-electrolyte *** calculations reveal that optical excitation towards shorter wavelengths leads to a progressive lowered energy barrier for H_(2)formation together with an enhanced energy barrier for^(*)COOH *** thermodynamically suppressed,CO_(2)reduction can still be improved kinetically by optimizing the excitation wavelength and intensity,being accompanied with the enhanced *** absorption spectroscopy results further correlate the higher photocurrent with a prolonged electron-phonon coupling time,verifying that the improvement of CO_(2)reduction kinetics in PEEC can be realized by hot electron harnessing.

关键词： plasmonic catalysis photoelectrochemical CO_(2)reduction CO/H_(2)ratio hot electron generation electronphonon coupling thermal effect

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Effects of heat transfer in a growing particle layer on microstructural evolution during solidification of colloidal suspensions

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Chinese Physics B 2021年第2期30卷 540-548页

作者： Jia-Xue You Yun-Han Zhang Zhi-Jun Wang Jin-Cheng Wang Sheng-Zhong Liu Key Laboratory of Applied Surface and Colloid Chemistry Ministry of EducationShaanxi Key Laboratory for Advanced Energy DevicesShaanxi Engineering Laboratory for Advanced Energy TechnologyInstitute for Advanced Energy MaterialsSchool of Materials Science and EngineeringShaanxi Normal UniversityXi'an 710119China State Key Laboratory of Solidification Processing School of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi'an 710072China

Heat transfer is the foundation of freezing colloidal suspensions and a key factor for the interface ***,how the thermal conductivity of particles affects freezing microstructural evolution remains *** in this work,a mathematical model is built up to investigate thermal interactions among a growing particle layer,pulling speeds,and the freezing interface under a thermal *** are conducted to confirm the tendency predictions of the *** the increase of pulling speeds,the drifting distance of the freezing interface increases and the time to finish drifting *** the thermal conductivity of particles(k_(p))is smaller than that of the surrounding(kw),the freezing interface tends to go forward to the warm ***,the freezing interface tends to go back to the cold side when the thermal conductivity of particles is larger than that of the surrounding(α=k_(p)/k_(w)>1).It originates from the shape of the local freezing interface:convex(α<1)or concave(α>1).These morphological changes in the local interface modify the premelting drag force F_(f).Whenα<1,F_(f)decreases and the freezing morphology tends to be the frozen ***α>1,F_(f)increases and the freezing morphologies tend to be ice *** understandings of how the thermal conductivity of particles affect microstructural evolution may optimize the production of freeze-casting materials and their structural-functional properties.

关键词： solidification colloidal suspensions heat transfer microstructural evolution

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Design and Characterization of 3d Printed Gradient Scaffolds with Spatial Distribution of Pore Sizes

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SSRN 2024年

作者： Ye, Fan Yang, He Hong, Chuhang Wu, Xiaopei Dai, Honglian State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China National energy key laboratory for new hydrogen-ammonia energy technologies Foshan Xianhu Laboratory Foshan528200 China

In bone repair, scaffold structural design is essential for optimizing mechanical performance and osteogenic potential. Gradient structural scaffolds are engineered to balance mechanical qualities and permeability which can improve the material transport capacity of scaffolds. This study designed and fabricated gradient structural scaffolds with spatially distributed pore size, and investigated their mechanical and fluid dynamics properties, coupled with in vitro osteogenic experiments to understand the impact of pore size distribution. The results indicated that, compared to traditional uniform pore scaffolds, gradient scaffolds exhibited a significant increase in mechanical strength, fluid permeability, and in vitro osteogenic activity. To sum up, the gradient scaffolds demonstrated better comprehensive performance and potential for use in the structural design of bone repair scaffolds, offering an important reference value for the three-dimensional structural design of scaffolds. © 2024, The Authors. All rights reserved.

关键词： 3D printing

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Design and Characterization of 3d Printed Gradient Scaffolds with Spatial Distribution of Pore Sizes

SSRN

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SSRN 2024年

作者： Ye, Fan Yang, He Hong, Chuhang Wu, Xiaopei Dai, Honglian State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China National Energy Key Laboratory for New Hydrogen-Ammonia Energy Technologies Foshan Xianhu Laboratory Foshan528200 China

In bone repair, scaffold structural design is essential for optimizing mechanical performance and osteogenic potential. Gradient structural scaffolds are engineered to balance mechanical qualities and permeability which can improve material transport capacity of scaffolds. This study designed and fabricated gradient structural scaffolds with spatially distributed pore size, and investigated their mechanical and fluid dynamics properties, coupled with in vitro osteogenic experiments to understand the impact of pore size distribution. The results indicated that, compared to traditional uniform pore scaffolds, gradient scaffolds exhibited a significant increase in mechanical strength, fluid permeability, and in vitro osteogenic activity. To sum up, the gradient scaffolds demonstrated better comprehensive performance and potential for use in the structural design of bone repair scaffolds, offering an important reference value for the three-dimensional structural design of scaffolds. © 2024, The Authors. All rights reserved.

关键词： 3D printing

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