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Novel Role of ER Stress and Mitochondria Stress in Serum-deprivation Induced Apoptosis of Rat Mesenchymal Stem Cells

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Current Medical Science 2018年第2期38卷 229-235页

作者： Tong QIU Yan-yan HE Xiao ZHANG Xiao-lin MA State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Biomedical Material and Engineering Center Wuhan University of Technology Wuhan 430070 China School of Materials Science and Engineering Wuhan University of Technology Wuhan 430070 China Biomedical Materials and Engineering Research Center of Hubei Province Wuhan University of Technology Wuhan 430070 China International School of Materials Science and Engineering Wuhan University of Techonology Wuhan 430070 China Hubei Key Laboratory of Purification and Application of Plant Anti-cancer Active Ingredients Hubei University of Education Wuhan 430205 China

The poor survival of mesenchymal stem cells （MSCs） compromises the efficacy of stem cell therapy. Growth factor deprivation is one of the important factors that have challenged the survival of donor MSCs in cell therapy. In this study, the aim was to evaluate the effect of serum deprivation on the cell death of MSCs and to investigate the underlying mechanisms. Apoptosis of MSCs was evaluated with Hoechst 33342/PI staining. Signaling pathways involved in serumdeprivation induced apoptosis were analyzed using Western blotting. The results revealed that serum deprivation induced apoptosis in MSCs within 72 h of treatment. Serum deprivation was shown to lead to protein expression alterations in Bax, Bcl-2, casepase-3, casepase-8, GRP78, and CHOP during experiments. The data suggested that the mitochondria death pathway, the extrinsic apoptotic pathway and the endoplastic reticulum（ER） stress pathway were all involved in MSCs apoptosis. The increase in expression of CHOP and the simultaneous decrease in Bcl- 2 expression suggest a synergistic effect in apoptosis induction in both the mitochondrion and the ER.

关键词： mesenchymal stem cells serum deprivation mitochondria pathway endoplasmicreticulum stress synergistic effects

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Type II heterojunction in hierarchically porous zinc oxide/graphitic carbon nitride microspheres promoting photocatalytic activity

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Journal of colloid and interface science 2019年 538卷 99-107页

作者： Sijia Wu Hong-Juan Zhao Chao-Fan Li Jing Liu Wenda Dong Heng Zhao Chao Wang Yang Liu Zhi-Yi Hu Lihua Chen 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. Lanzhou Petrochemical Research Center Lanzhou 730060 China. 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 122 Luoshi Road 430070 Wuhan Hubei China. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology 122 Luoshi Road 430070 Wuhan Hubei China. Electronic address: liu_jing@***. Nanostructure Research Centre (NRC) Wuhan University of Technology 122 Luoshi Road 430070 Wuhan Hubei China. Electronic address: zhiyi.hu@***. Nanostructure Research Centre (NRC) Wuhan University of Technology 122 Luoshi Road 430070 Wuhan Hubei China. Electronic address: yu.li@***. Laboratory of Inorganic Materials Chemistry (CMI) University of Namur 61 rue de Bruxelles B-5000 Namur Belgium Clare Hall University of Cambridge Herschel Road Cambridge CB3 9AL United Kingdom.

Graphitic carbon nitride (g-CN) is a visible light active semiconductor. However, low conductivity and high recombination rate of photogenerated electrons and holes limit its application in photocatalysis. In this work, we design and synthesize hierarchically porous zinc oxide/graphitic carbon nitride (ZnO/g-CN) microspheres with type-II heterojunction to effectively degrade rhodamine B (RhB) via increasing the charge-separation efficiency. The ultraviolet-visible (UV-Vis) absorption spectra, Mott-Schottky plots and valence band X-ray photoelectron spectroscope confirm the formation of type-II heterojunction between ZnO nanocrystals and g-CN nanosheets. As a result, the 1.5-ZnO/g-CN composite (the mass ratio of zinc acetate dihydrate to g-CN is 1.5) exhibits the highest photocatalytic activity with good stability and higher photocatalytic degradation rate comparing to pure g-CN and pure ZnO. In addition, our results confirm that O and h are the main active species for ZnO/g-CN in degradation of RhB.

关键词： Active species Heterojunction Hierarchically porous structure Photocatalytic activity ZnO/g-C(3)N(4)

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Effect of B doping on electrical and thermal properties of SiC bodies fabricated by spark plasma sintering

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materials Today: Proceedings 2019年 16卷 211-215页

作者： Yukina Taki Mettaya Kitiwan Hirokazu Katsui Takashi Goto Institute for Materials Research Tohoku University 2-1-1 Katahira Aoba-ku Sendai 980-8577 Japan Department of Physics Faculty of Science King Mongut’s Institute of Technology Ladkrabang (KMITL) Chalongkrung Road Ladkrabang Bangkok 10520 Thailand State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology 122 Luoshi Road Wuhan China

B-doped SiC bodies were fabricated by spark plasma sintering at 2373 K, 50 MPa, 300 s in a vacuum and N 2 atmosphere. The relative density of 1 mol% B doped-SiC body sintered in a vacuum and 5 mol% B doped-SiC body sintered in N 2 atmosphere were 97 and 98%, respectively. The electrical conductivity of B-doped SiC bodies sintered in a vacuum with 0.5 mol% B and that with 1 mol% B sintered in N 2 atmosphere showed semi-insulative conduction in the range of 3–5×10 -3 S m -1 at room temperature. The thermal conductivity of B-doped SiC body at 0.5 at% B sintered in a vacuum were 185 W m -1 K -1 while that at 1 at% B sintered in N 2 atmosphere were 177 W m -1 K -1 at room temperature.

关键词： Silicon carbide Electrical conductivity Seebeck coefficient Spark plasma sintering

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Front Cover: 3D Nitrogen-Doped Graphene Encapsulated Metallic Nickel–Iron Alloy Nanoparticles for Efficient Bifunctional Oxygen Electrocatalysis (Chem. Eur. J. 18/2020)

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Chemistry – A European Journal 2020年第18期26卷 3894-3894页

作者： Zhaoyang Wang Xiaobin Liao Zifeng Lin Prof. Fuzhi Huang Yalong Jiang Kwadwo Asare Owusu Prof. Lin Xu Ziang Liu Dr. Jiantao Li Prof. Yan Zhao Prof. Yi-Bing Cheng Prof. Liqiang Mai State Key Laboratory of Advanced Technology for Materials Synthesis and Processing State Key Laboratory of Silicate Materials for Architectures Wuhan University of Technology Wuhan 430070 P. R. China ARC Centre of Excellence in Exciton Science Monash University Clayton Victoria 3800 Australia

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Interface-modulated fabrication of hierarchical yolk-shell Co3O4/C dodecahedrons as stable anodes for lithium and sodium storage

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Nano Research 2017年第7期10卷 2364-2376页

作者： Yuzhu Wu Jiashen Meng Qi Li Chaojiang Niu Xuanpeng wang Wei Yang Wei Li Liqiang Mai State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China Department of Chemistry University of California Berkeley California 94720 USA

Transition-metal oxides （TMOs） have gradually attracted attention from resear- chers as anode materials for lithium-ion batteries （LIBs） and sodium-ion batteries （SIBs） because of their high theoretical capacity. However, their poor cycling stability and inferior rate capability resulting from the large volume variation during the lithiation/sodiation process and their low intrinsic electronic con- ductivity limit their applications. To solve the problems of TMOs, carbon-based metal-oxide composites with complex structures derived from metal-organic frameworks （MOFs） have emerged as promising electrode materials for LIBs and SIBs. In this study, we adopted a facile interface-modulated method to synthesize yolk-shell carbon-based Co3O4 dodecahedrons derived from ZIF-67 zeolitic imida- zolate frameworks. This strategy is based on the interface separation between the ZIF-67 core and the carbon-based shell during the pyrolysis process. The unique yolk-shell structure effectively accommodates the volume expansion during lithiation or sodiation, and the carbon matrix improves the electrical conductivity of the electrode. As an anode for LIBs, the yolk-shell Co3O4/C dodecahedrons exhibit a high specific capacity and excellent cycling stability （1,100 mAh.g-1 after 120 cycles at 200 mA-g-1）. As an anode for S1Bs, the composites exhibit an outstand- ing rate capability （307 mAh-g-1 at 1,000 mA-g-1 and 269 mAh.g-1 at 2,000 mA-g-1）. Detailed electrochemical kinetic analysis indicates that the energy storage for Li＋ and Na＋ in yolk-sheU Co3O4/C dodecahedrons shows a dominant capacitive behavior. This work introduces an effective approach for fabricating carbon- based metal-oxide composites by using MOFs as ideal precursors and as electrode materials to enhance the electrochemical performance of LIBs and SIBs.

关键词： carbon-based metal oxide metal--organicframeworks （MOFs） yolk-shell structure lithium-ion batteries （LIBs） sodium-ion batteries（SIBs）

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Molybdenum disulfide quantum dots directing zinc indium sulfide heterostructures for enhanced visible light hydrogen production

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Journal of colloid and interface science 2019年 551卷 111-118页

作者： Yang Liu Chao-Fan Li Xiao-Yun Li Wen-Bei Yu Wen-Da Dong Heng Zhao Zhi-Yi Hu Zhao Deng Chao Wang Si-Jia Wu Hao Chen Jing Liu Zhao Wang Li-Hua Chen 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. 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 122 Luoshi Road 430070 Wuhan Hubei China. State Key Laboratory of Silicate Materials for Architectures Wuhan University of Technology Wuhan 430070 China. Electronic address: xiaoyunli2015@***. Cambridge Graphene Centre University of Cambridge Cambridge CB3 0FA UK. Nanostructure Research Centre (NRC) Wuhan University of Technology 122 Luoshi Road 430070 Wuhan Hubei China. Electronic address: yu.li@***. Laboratory of Inorganic Materials Chemistry (CMI) University of Namur 61 rue de Bruxelles B-5000 Namur Belgium.

Photocatalytic hydrogen (H) production based on semiconductors is important to utilize solar light for clean energy and environment. Herein, we report a visible light responsive heterostructure, designed and constructed by molybdenum disulfide quantum dots (MoS-QDs) in-situ seeds-directing growth and self-assemble of zinc indium sulfide (ZnInS) nanosheet to ensure their full contact through a simple one-step solvothermal method for highly improved visible light H production. The MoS-QDs in-situ seeds-directing ZnInS heterostructure not only builds heterojunctions between MoS and ZnInS to spatially separate the photogenerated electrons and holes, but also serves as the active sites trapping photogenerated electrons to facilitate H evolution. As a result, MoS-QDs/ZnInS exhibits high photocatalytic activity for H production, and the optimized 2 wt% MoS-QDs/ZnInS (2MoS-QDs/ZnInS) heterostructure exhibits the highest H evolution rate of 7152 umol·h·g under visible light, ∼9 times of pure ZnInS. Our strategy here could shed some lights on developing noble-metal free heterostructures for highly efficient photocatalytic H production.

关键词： Heterostructure MoS(2) Photocatalytic hydrogen production Quantum dots ZnIn(2)S(4)

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Activation of subnanometric Pt on Cu-modified CeO2 via redox-coupled atomic layer deposition for CO oxidation (vol 11, 4240, 2020)

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NATURE COMMUNICATIONS 2020年第1期11卷 4240-4240页

作者： Liu, Xiao Jia, Shuangfeng Yang, Ming Tang, Yuanting Wen, Yanwei Chu, Shengqi Wang, Jianbo Shan, Bin Chen, Rong State Key Laboratory of Digital Manufacturing Equipment and Technology School of Mechanical Science and Engineering Huazhong University of Science and Technology 430074 Wuhan Hubei People’s Republic of China State Key Laboratory of Materials Processing and Die and Mould Technology School of Materials Science and Engineering Huazhong University of Science and Technology 430074 Wuhan Hubei People’s Republic of China School of Physics and Technology Center for Electron Microscopy MOE Key Laboratory of Artificial Micro- and Nano-structures and Institute for Advanced Studies Wuhan University 430072 Wuhan Hubei People’s Republic of China General Motors Global Research and Development Chemical Sciences and Materials Systems Lab 3500 Mound Road Warren Michigan 48090 USA Institute of High Energy Physics Chinese Academy of Sciences 100049 Beijing People’s Republic of China Present Address: Department of Chemical and Biomolecular Engineering Clemson University Clemson South Carolina 29634 USA

A Correction to this paper has been published: 10.1038/s41467-020-19663-3.

关键词： Heterogeneous catalysis Pollution remediation materials for energy and catalysis synthesis and processing

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Probing and suppressing voltage fade of Li-rich Li 1.2 Ni 0.13 Co 0.13 Mn 0.54 O 2 cathode material for lithium-ion battery

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Electrochimica Acta 2019年 318卷 875-882页

作者： Wei Zou Fan-Jie Xia Jian-Ping Song Liang Wu Liang-Dan Chen Hao Chen Yang Liu Wen-Da Dong Si-Jia Wu Zhi-Yi Hu Jing Liu Hong-En Wang Li-Hua Chen Yu Li Dong-Liang Peng 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 122 Luoshi Road 430070 Wuhan Hubei China Department of Materials Science and Engineering College of Materials Xiamen University 422 Siming South Road Xiamen 361005 China Laboratory of Inorganic Materials Chemistry (CMI) University of Namur 61 Rue de Bruxelles B-5000 Namur Belgium

The voltage fade of Li-rich layered oxide cathode material Li 1.2 Ni 0.13 Co 0.13 Mn 0.54 O 2 (LNCM) heavily hinders its application in Li-ion batteries. Herein, we revisit the origin of the voltage fade of LNCM and propose a solution to suppress this effect. It is demonstrated that the voltage fade of the LNCM cathode comes from the structural change of the crystal from layer structure to spinel structure, involving all the cations rearrangement. Such rearrangement of all the cations in LNCM is due to the high degree of delithiation and oxygen release at high cutoff voltage of 4.8 V. It is also evidenced that nickel and cobalt change from low valence to high valence at the discharged state, which not only inhibits the transport of lithium ions, but also leads to the loss of high voltage platforms. In particular, the cation rearrangement of Li/Mn causes valence change from Mn 4+ to Mn 3+ , resulting in the decrease of discharge voltage platform at the cutoff voltage of 4.8 V much higher than at 4.6 V. The lower charge cutoff voltage can be a solution to suppress the voltage fade of LNCM cathode materials and have a good stability of LNCM cathode materials without compromising the battery performance.

关键词： Voltage fade Li-rich cathode material Structure change Cations rearrangement Lithium-ion batteries

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Antiferroelectric and magnetodielectric coupling response of la0.2sr0.7fe12o19 ceramics

arXiv

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arXiv 2018年

作者： Huang, Yao Tan, Guolong State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China

Multiferroics is a class of functional materials that simultaneously exhibit ferroelectricity and ferromagnetism in a single structure. We report here the integration of anti-ferroelectricity and ferromagnetism in a new M-type hexaferrite compound, in which 0.3 Sr ions was substituted by 0.2 La3+ ions in SrFe12O19 so as to keep the charge balance. This doped compound is expressed as a molecular formula of La0.2Sr0.7Fe12O19, which was confirmed by XRD to have the same structure as SrFe12O19 with a lattice contraction of 0.59%. Surprisingly, the doping effect turns La0.2Sr0.7Fe12O19 from ferroelectric to antiferroelectric phase, which displays double hysteresis loops with a maximum polarization of 154 ?C/cm2 and a remnant one of 38 ?C/cm2. The dielectric constant ?' is also greatly improved from 1462 to 1451778 at 10.2Hz by this substitution. This compound simultaneously demonstrates strong ferromagnetism, the remnant magnetic moment and coercive field are 52 emu/g and 5876 Oe, respectively. In addition, La0.2Sr0.7Fe12O19 also exhibits strong magnetodielectric (MD) response, in which a applying magnetic field B lifts the whole ?'-f spectra up and right shifts ?"-f spectra (?m) to higher frequency side. Both real and imaginary parts of the dielectric constant varies with frequency and B field and obey Debye relaxation model. The maximum MD increment in ?' reaches as high as 540830 upon a B field of 926mT. The capacitance of the La0.2Sr0.7Fe12O19 ceramics could be much more enhanced by applying a magnetic field B, which could induce an additional polarization P(H) upon the conventional P(E) by the cycloid conical spin in the intermediate phases. These results suggest that La0.2Sr0.7Fe12O19 exhibits a strong interplay between magnetic ordering and ferroelectricity, which makes it a good magnetoelectric coupling candidate. Copyright © 2018, The Authors. All rights reserved.

关键词： Magnetic fields

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Single-nanowire Electrochemical Device for In-situ Explore the Intrinsic Electrochemical Processes at Nanoscale

Single-nanowire Electrochemical Device for In-situ Explore t...

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中国化学会第三届中国能源材料化学研讨会

作者： Ping Hu Ting Zhu Liang Zhou Liqiang Mai State Key Laboratory of Advanced Technology for Materials Synthesis and Processing International School of Materials Science and EngineeringWuhan University of Technology

＜正＞The single-nanowire electrochemical probe is an effective tool to explore the intrinsic mechanisms of the electrochemical reactions in ***,we designed and assembled the single-nanowire aqueous zinc ion battery（...

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