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Alginate@TiO 2 hybrid microcapsules as a reservoir of beta INS-1E cells with controlled insulin delivery

Journal of materials Science 2020年第18期55卷 7857-7869页

作者： Grégory Leroux Myriam Neumann Christophe F. Meunier Carine Michiels Li Wang Bao-Lian Su Laboratory of Inorganic Materials Chemistry (CMI) University of Namur Namur Belgium Laboratory of Biochemistry and Cell Biology (URBC) Namur Research Institute for Life Sciences (NARILIS) University of Namur Namur Belgium State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan China

Designing biocompatible materials to encapsulate xenogeneic insulin-releasing β-cells for transplantation has been considered as a promising alternative to avoid the immunosuppression and drawbacks of the treatment of Type 1 diabetes mellitus (T1D) by direct islet transplantation. The current work for the first time studied a hybrid alginate@TiO2 microcapsule as a reservoir for rat insulinoma-derived INS-1E cells, as a β-cell surrogate, towards the treatment of T1D. The hybrid microcapsule is composed of an alginate core as a biocompatible matrix for cell encapsulation and a crack-free TiO2 shell as a semipermeable membrane to prevent cell leakage, protect encapsulated cells from immune attacks, as well as allow the diffusion of nutrients and the secretion of insulin. Compared to most-commonly used pure alginate microcapsules, the insulin-secreting INS-1E cells encapsulated in our alginate@TiO2 microcapsules revealed higher metabolic activity and maintained the insulin secretion over more than 6 weeks. This study highlights that our designed alginate@TiO2 hybrid microcapsules can serve as an ideal reservoir for cell encapsulation towards the treatment of T1D, thus further promoting the development of artificial organs for cell therapy.

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A 3D C@AlF 3 multifunctional hollow spheres lithium host for lithium metal batteries

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Journal of Colloid and Interface Science 2025年

作者： Zhuo-Hang Zeng Ya-Wen Tian Qian-Yu Gao Zhi-Rong Li Zhi Qian Zi-Shuo Xia Qing-Qing Yang Zhi-Yi Hu Hemdan S.H. Mohamed Yu Li Bao-Lian Su State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology 122 Luoshi Road 430070 Wuhan Hubei China Nanostructure Research Centre (NRC) Wuhan University of Technology Wuhan 430070 China Physics Department Faculty of Science Fayoum University El Gomhoria Street 63514 Fayoum Egypt Laboratory of Inorganic Materials Chemistry (CMI) University of Namur 61 rue de Bruxelles B-5000 Namur Belgium

Lithium (Li) metal has been deemed as an ideal anode for new generation rechargeable batteries owing to its unparalleled theoretical specific capacity, lowest electrochemical potential, and lightweight. However, volume expansion and the Li dendrites limit the performance of Li metal batteries (LMBs). In this work, we design a C@AlF 3 hollow spheres as multifunctional lithium anode host material for Li metal battery. The hollow carbon spheric structure effectively accommodates Li to alleviate the volume expansion, and the lithiophilic AlF 3 forms Li-Al alloy (Li x Al y ) and LiF solid electrolyte interphase (SEI) with Li. The Li x Al y alloy guides the Li uniformly depositing inside the inner surface to suppress the Li dendrites formation. The LiF SEI is beneficial for Li + flux to further facilitate the Li uniform deposition. Therefore, the designed Li metal anode demonstrates a lifespan over 2000 h for symmetric cells and voltage hysteresis less than 10 mA. When assembled with LiFePO 4 cathode, the full cell provides a reversible capacity of 91.6 mAh g −1 after 300 cycles at 1C. Our work here provides a feasible route to design a Li metal anode for high performance LMBs.

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Enhanced stability of highly-dispersed copper catalyst supported by hierarchically porous carbon for long term selective hydrogenation

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催化学报 2020年第7期41卷 1081-1090页

作者： Hu Nian Li Xiaoyun Liu Siming Wang Zhao He Xiaoke Hou Yuexin Wang Yuxiang Deng Zhao Chen Lihua Su Baolian Laboratory of Living Materials Wuhan University of Technology the State Key Laboratory of Advanced Technology for Material Synthesis and Processing Hubei Wuhan 430070 Wuhan University of Technology State Key Laboratory of Silicate Materials for Architectures Hubei Wuhan 430070 Laboratory of Inorganic Materials Chemistry (CMI) University of Namur Belgium Namur B-5000 Clare Hall University of Cambridge Cambridge CB3 9AL

Copper based catalysts have high potential for the substituent of noble-metal based catalysts as their high selectivity and moderate activity for selective hydrogenation reaction; however, achieving further high catalytic stability is very difficult. In this work, the carbonization process of Cu-based organic frameworks was explored for the synthesis of highly-dispersed Cu supported by hierarchically porous carbon with high catalytic performance for selective hydrogenation of 1,3-butadiene. The porous hierarchy of carbon support and the dispersion of copper nanoparticles can be precisely tuned by controlling the carbonization process. The resultant catalyst carbonized at 600 °C exhibits a rather low reaction temperature at 75 °C for 100% butadiene conversion with 100% selectivity to butenes, due to its reasonable porous hierarchy and highly-dispersed copper sites. More importantly, unprecedentedly stability of the corresponding Cu catalyst was firstly observed for selective 1,3-butadiene hydrogenation, with both 100% butadiene conversion and 100% butenes selectivity over 120 h of reaction at 75 °C. This study verifies that a simply control the carbonization process of metal organic frameworks can be an effective way to obtain Cu-based catalysts with superior catalytic performance for selective hydrogenation reaction.

关键词： Hierarchically porous structure Catalyst Cu/C Selective hydrogenation Metal organic frameworks

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Recent advances in TiO_2 nanoarrays/graphene for water treatment and energy conversion/storage

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Science China materials 2019年第3期62卷 325-340页

作者： Yanhua Fan Guangwu Hu Shuaiqin Yu Liqiang Mai Lin Xu College of Ocean Science and Engineering Shanghai Maritime UniversityShanghai 200135China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China

Although TiO2-based nanostructures with unique chemical and physical properties exhibit great promise in water treatment and energy conversion/storage,there still exist some *** order to further improve the photochemical properties,one-dimension TiO2 nanoarrays on the substrate are primarily combined with graphene by various preparation *** composite coating has exhibited extraordinary photocatalytic abilities in the degradation of organic pollutants into less toxic compounds,antimicrobial activity and adsorption capacity in water ***,it is easy to recycle after photocatalytic ***,TiO2 nanoarrays/graphene on the substrate(especially flexible substrate)could provide potential opportunities for flexible-device fabrication with excellent photovoltaic conversion efficiency and electrochemical performance in energy conversion/storage *** far as we know,the relevant reviews have rarely been ***,we present a comprehensive review on the preparation of TiO2 nanoarrays or TiO2 nanoarrays/graphene,and their application and mechanism in water treatment and energy conversion/storage.

关键词： TiO2 nanoarrays graphene photocatalysis water treatment energy conversion/storage

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Quasilinear dispersion in electronic band structure and high Seebeck coefficient in CuFeS2-based thermoelectric materials

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Physical Review materials 2020年第2期4卷 025405-025405页

作者： Hongyao Xie Xianli Su Shiqiang Hao Christopher Wolverton Ctirad Uher Xinfeng Tang Mercouri G. Kanatzidis State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China Department of Chemistry Northwestern University Evanston Illinois 60208 USA Department of Materials Science and Engineering Northwestern University Evanston Illinois 60208 USA Department of Physics University of Michigan Ann Arbor Michigan 48109 USA

The earth-abundant natural mineral chalcopyrite CuFeS2 is a potential n-type thermoelectric material because of its large Seebeck coefficient at high carrier concentrations. For a long time, the large Seebeck coefficient of CuFeS2 has been attributed to a large electron effective mass, but the reasons for this and the unusual carrier concentration dependent behavior have rarely been discussed. Here, we systematically investigated the special transport behavior of CuFeS2 and found the classical parabolic band model to be inadequate in explaining it. Our experimental and theoretical studies indicate that there are two flat electronic pockets at the Γ and Z points of the Brillouin zone near the conduction band edge of CuFeS2 that dominate the charge transport. These electronic pockets result from nonparabolic quasilinearly dispersing bands that give rise to a linear wave vector dependent energy (E∼k) and a carrier density dependent effective mass (m*∼m0n1/3). Such a strong carrier concentration dependent carrier effective mass results in the high Seebeck coefficient of CuFeS2 compound under a large carrier density. The work demonstrates that quasilinearly dispersing bands can give strongly enhanced Seebeck coefficient, and could be useful in optimizing the properties of thermoelectric materials.

关键词： Thermoelectric effects

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Molecularly Tunable Heterostructured Co-Polymers Containing Electron-Deficient and -Rich Moieties for Visible-Light and Sacrificial-Agent-Free H2O2Photosynthesis

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Angewandte Chemie 2024年第29期136卷

作者： Jingzhao Cheng Wang Wang Jianjun Zhang Sijie Wan Prof. Bei Cheng Prof. Jiaguo Yu Prof. Shaowen Cao State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology 122 Luoshi Road Wuhan 430070 P. R. China Hubei Technology Innovation Center for Advanced Composites Wuhan University of Technology 122 Luoshi Road Wuhan 430070 P. R. China Laboratory of Solar Fuel Faculty of Materials Science and Chemistry China University of Geosciences 68 Jincheng Street Wuhan 430078 P. R. China

As an alternative to hydrogen peroxide (H 2 O 2 ) production by complex anthraquinone oxidation process, photosynthesis of H 2 O 2 from water and oxygen without sacrificial agents is highly demanded. Herein, a covalently connected molecular heterostructure is synthesized via sequential C−H arylation and Knoevenagel polymerization reactions for visible-light and sacrificial-agent-free H 2 O 2 synthesis. The subsequent copolymerization of the electron-deficient benzodithiophene-4,8-dione (BTD) and the electron-rich biphenyl (B) and p -phenylenediacetonitrile (CN) not only expands the π-conjugated domain but also increases the molecular dipole moment, which largely promotes the separation and transfer of the photoinduced charge carriers. The optimal heterostructured BTDB-CN 0.2 manifested an impressive photocatalytic H 2 O 2 production rate of 1920 μmol g −1 h −1 , which is 2.2 and 11.6 times that of BTDB and BTDCN. As revealed by the femtosecond transient absorption (fs-TA) and theoretical calculations, the linkage serves as a channel for the rapid transfer of photogenerated charge carriers, enhancing the photocatalytic efficiency. Further, in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) uncovers that the oxygen reduction reaction occurs through the step one-electron pathway and the mutual conversion between C=O and C−OH with the anchoring of H + during the catalysis favored the formation of H 2 O 2 . This work provides a novel perspective for the design of efficient organic photocatalysts.

关键词： molecular heterostructure H2O2 dipole moment channel reaction path

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Electrochemical Hydrophobic Tri-layer Interface Rendered Mechanically Graded Solid Electrolyte Interface for Stable Zinc Metal Anode

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Angewandte Chemie 2024年第9期136卷

作者： Dr. Chaozheng Liu Dr. Wangwang Xu Dr. Lei Zhang Daotong Zhang Dr. Weina Xu Dr. Xiaobin Liao Weimin Chen Dr. Yizhong Cao Prof. Mei-Chun Li Prof. Changtong Mei Dr. Kangning Zhao Co-Innovation Center of Efficient Processing and Utilization of Forest Resources College of Materials Science and Engineering Nanjing Forestry University Nanjing 210000 China Mechanical & Industrial Engineering Department Louisiana State University Baton Rouge LA-70803 USA State Key Laboratory of Advanced Technology for Materials Synthesis and Processing International School of Materials Science and Engineering Wuhan University of Technology Wuhan 430070 China School of Materials Science and Engineering Dongguan University of Technology Guangdong 523808 China College of Chemistry and Materials Engineering Zhejiang A&F University Hangzhou 311300 China Laboratory of Advanced Separations (LAS) École Polytechnique Fédérale de Lausanne (EPFL) Sion 1950 Lausanne Switzerland

The aqueous zinc-ion battery is promising as grid scale energy storage device, but hindered by the instable electrode/electrolyte interface. Herein, we report the lean-water ionic liquid electrolyte for aqueous zinc metal batteries. The lean-water ionic liquid electrolyte creates the hydrophobic tri-layer interface assembled by first two layers of hydrophobic OTF − and EMIM + and third layer of loosely attached water, beyond the classical Gouy–Chapman–Stern theory based electrochemical double layer. By taking advantage of the hydrophobic tri-layer interface, the lean-water ionic liquid electrolyte enables a wide electrochemical working window (2.93 V) with relatively high zinc ion conductivity (17.3 mS/cm). Furthermore, the anion crowding interface facilitates the OTF − decomposition chemistry to create the mechanically graded solid electrolyte interface layer to simultaneously suppress the dendrite formation and maintain the mechanical stability. In this way, the lean-water based ionic liquid electrolyte realizes the ultralong cyclab.lity of over 10000 cycles at 20 A/g and at practical condition of N/P ratio of 1.5, the cumulated areal capacity reach 1.8 Ah/cm 2 , which outperforms the state-of-the-art zinc metal battery performance. Our work highlights the importance of the stable electrode/electrolyte interface stability, which would be practical for building high energy grid scale zinc-ion battery.

关键词： Electrochemical Tri-Layer Interface Hydrophobic Ionic Liquid Mechanically Graded Solid Electrolyte Interface Zinc Battery

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Large-scale current collectors for regulating heat transfer and enhancing battery safety

Nature Chemical Engineering

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Nature Chemical Engineering 2024年 542-551页

作者： Lun Li Huazhang Zhang Xin Zhao Daping He Wei Shu Zixin Zhang Yu Zhao Xingchuan Li Zongkui Kou Yong Xiao Francis Verpoort Liqiang Mai Jinlong Yang Rui Tan CheeTong John Low Cheng Li Yajun Zhang Hewu Wang Hubei Engineering Research Center of RF-Microwave Technology and Application School of Physics and Mechanics Wuhan University of Technology Wuhan China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing State Key Laboratory of Silicate Materials for Architectures School of Materials Science and Engineering Wuhan University of Technology Wuhan China Guangdong Provincial Key Laboratory of New Energy Materials Service Safety College of Materials Science and Engineering Shenzhen University Shenzhen China Department of Chemical Engineering Swansea University Swansea UK Warwick Electrochemical Engineering Group WMG Energy Innovation Centre University of Warwick Warwick UK School of Vehicle and Mobility Tsinghua University Beijing China

Thermal runaway, a major battery safety issue, is triggered when the local temperature exceeds a threshold value resulting from slower heat dissipation relative to heat generation inside the cell. However, improving internal heat transfer is challenged by the low thermal conductivity of metal current collectors (CCs) and challenges in manufacturing nonmetal CC foils at large scales. Here we report a rapid temperature-responsive nonmetallic CC that can substitute benchmark Al and Cu foils to enhance battery safety. The nonmetallic CC was fabricated through a continuous thermal pressing process to afford a highly oriented Gr foil on a hundred-meter scale. This Gr foil demonstrates a high thermal conductivity of 1,400.8 W m−1K−1, about one order of magnitude higher than those of Al and Cu foils. Importantly, LiNi0.8Co0.1Mn0.1O2||graphite cells integrated with these temperature-responsive foils show faster heat dissipation, eliminating the local heat concentration and circumventing the fast exothermic aluminothermic and hydrogen-evolution reactions, which are critical factors causing the thermal failure propagation of lithium-ion battery packs.

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(Bi_(0.51)Na_(0.47))TiO_(3) based lead free ceramics with high energy density and efficiency

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Journal of Materiomics 2019年第3期5卷 385-393页

作者： Yu Huang Fei Li Hua Hao Fangquan Xia Hanxing Liu Shujun Zhang State Key Lab Silicate Materials for Architecture Center for Smart Materials and Device IntegrationSchool of Materials Science and EngineeringWuhan University of TechnologyWuhan430070China Electronic Materials Research Laboratory Key Lab Ministry of Education and International Center for Dielectric ResearchSchool of Electronic and Information EngineeringXi'an Jiaotong UniversityXi'an710049China School of Chemistry and Chemical Engineering University of JinanJinan250022China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Center for Smart Materials and Device IntegrationInternational School of Materials Science and EngineeringWuhan University of TechnologyWuhan430070China Institute for Superconducting and Electronic Materials Australian Institute of Innovative MaterialsUniversity of WollongongNSW2500Australia

Dielectric ceramics with high energy storage density and energy efficiency play an important role in high power energy storage *** this work,lead free relaxor ferroelectric ceramics in (1-x) Bi_(0.51)Na_(0.47)TiO_(3-x)Ba(Zr_(0.3)Ti_(0.7))O_(3)(BNT-BZT100x:x=0.20,0.30,0.40 and 0.50)system are fabricated by conventional solid-state sintering *** BNT-BZT100x ceramics are sintered dense with minimal pores,exhibiting pseudocubic symmetry and strong relaxor characteristic.A high energy storage density of 3.1 J/cm^(3) and high energy efficiency of 91% are simultaneously achieved in BNT-BZT40 ceramic with 0.1mm in thickness,at the applied electric field of 280 kV/*** temperature stability of the energy density is studied over temperature range of 20-160℃ ,showing minimal variation below 1.5%,together with the excellent cycling reliability(the variations of both energy density and efficiency are below 3% up to 106 cycles),making BNT-BZT40 ceramic promising candidate for high-temperature dielectric and energy storage applications.

关键词： Energy storage Lead free ceramic Relaxor characteristic

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A Blinking Mesoporous TiO2−x Composed of Nanosized Anatase with Unusually Long-Lived Trapped Charge Carriers

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Angewandte Chemie 2020年第35期132卷 15110-15117页

作者： Zhang T. Low J. Yu J. Tyryshkin A.M. Mikmeková E. Asefa T. Department of Chemical and Biochemical Engineering Rutgers The State University of New Jersey 98 Brett Road Piscataway NJ 08854 United States State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology 122 Luoshi Road Wuhan Hubei 430070 China Department of Chemistry and Chemical Biology Rutgers The State University of New Jersey 610 Taylor Road Piscataway NJ 08854 United States Institute of Scientific Instruments of the ASCR Czech Academy of Sciences Královopolská 147 Brno 612 64 Czech Republic

A mesoporous TiO2−x material comprised of small, crystalline, vacancy-rich anatase nanoparticles (NPs) shows unique optical, thermal, and electronic properties. It is synthesized using polymer-derived mesoporous carbon (PDMC) as a template. The PDMC pores serve as physical barriers during the condensation and pyrolysis of a titania precursor, preventing the titania NPs from growing beyond 10 nm in size. Unlike most titania nanomaterials, during pyrolysis the NPs undergo no transition from the anatase to rutile phase and they become catalytically active reduced TiO2−x. When exposed to a slow electron beam, the NPs exhibit a charge/discharge behavior, lighting up and fading away for an average period of 15 s for an extended period of time. The NPs also show a 50 nm red-shift in their UV/Vis absorption and long-lived charge carriers (electrons and holes) at room temperature in the dark, even long after UV irradiation. The NPs as photocatalysts show a good activity for CO2 reduction. © 2020 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim

关键词： blinking nanoparticles carbon dioxide reduction long-lived charge carriers photocatalytic energy conversions titanium dioxide

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