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The electrochemical characteristics of AB_(4)-type rare earth-Mg-Ni-based superlattice structure hydrogen storage alloys for nickel metal hydride battery

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Journal of Magnesium and Alloys 2021年第6期9卷 2039-2048页

作者： Wenfeng Wang Xiaoxue Liu Lu Zhang Shuang Zhang Wei Guo Yumeng Zhao hongming zhang yuan Li Shumin Han State Key Laboratory of Metastable Materials Science and Technology Yanshan UniversityQinhuangdao 066004PR China School of Environmental and Chemical Engineering Yanshan UniversityQinhuangdao 066004PR China

Rare earth-Mg-Ni-based alloys with superlattice structures are new generation negative electrode materials for the nickel metal hydride *** them,the novel AB_(4)-type superlattice structure alloy is supposed to have superior cycling stability and rate *** its preparation is hindered by the crucial requirement of temperature and the special composition which is close to the other superlattice ***,we prepare rare earth-Mg-Ni-based alloy and study the phase transformation of alloys to make clear the formation of AB_(4)-type *** is found Pr_(5)Co_(19)-type phase is converted from Ce_(5)Co_(19)-type phase and shows good stability at higher temperature compared to the Ce_(5)Co_(19)-type phase in the range of 930-970℃.Afterwards,with further 5℃increasing,AB_(4)-type superlattice structure forms at a temperature of 975℃by consuming Pr_(5)Co_(19)-type *** contrast with A_(5)B_(19)-type alloy,AB_(4)-type alloy has superior rate capability owing to the dominant advantages of charge transfer and hydrogen ***,AB_(4)-type alloy shows long lifespan whose capacity retention rates are 89.2%at the 100;cycle and 82.8%at the 200;cycle,***_(4)-type alloy delivers 1.53 wt.%hydrogen storage capacity at room temperature and exhibits higher plateau pressure than Pr_(5)Co_(19)-type *** work provides novel AB_(4)-type alloy with preferable electrochemical performance as negative electrode material to inspire the development of nickel metal hydride batteries.

关键词： Nickel metal hydride batteries Hydrogen storage alloys AB_(4)-type superlattice structure Electrochemical performance Kinetics properties

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Dietary fats suppress the peritoneal seeding of colorectal cancer cells through the TLR4/Cxcl10 axis in adipose tissue macrophages

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Signal Transduction and Targeted Therapy 2020年第1期5卷 457-469页

作者： Wei Xiang Rongchen Shi Dapeng Zhang Xia Kang Lili Zhang Jing yuan Xuan Zhang hongming Miao Department of Biochemistry and Molecular Biology Third Military Medical University(Army Medical University)400038 ChongqingChina Department of Oncology Southwest HospitalThird Military Medical University(Army Medical University)400038 ChongqingChina

Peritoneal carcinomatosis(PC)of colorectal cancer(CRC)is a terminal phase of malignancy with no effective strategies for the prevention of this *** we established PC models in mice by intraperitoneal engraftment of CRC cells and revealed an unexpected role for a high-fat diet(HFD)in preventing metastatic seeding in the visceral ***,the HFD stimulated the activation of adipose tissue macrophages(ATMs)toward an M1-like phenotype and enhanced ATM tumor phagocytosis in a TLR4-dependent ***,the TLR4–Cxcl10 axis in ATMs promoted T cell recruitment,and M1-like macrophages stimulated T cell activation in tumor-seeded *** inhibitory effect of the HFD on tumor seeding was abolished with the ablation of macrophages,inactivation of T cells,or blockade of the TLR4–Cxcl10 axis in ***,we showed that a HFD and conventional chemotherapeutic agents(oxaliplatin or 5-fluorouracil)synergistically improved the survival of tumor-seeded ***,our findings demonstrate that peritoneal seeding of CRC can be suppressed by short-term treatment with a HFD in the early phase,providing a novel concept for the management of these patients in the clinic.

关键词： peritoneal colorectal TLR4

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PVDF粉体预辐照接枝甲基丙烯酸缩水甘油酯制备锂离子二次电池隔膜研究

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辐射研究与辐射工艺学报 2011年第5期29卷 266-270页

作者：苑洪铭李吉豪于洋李林繁邓波虞鸣李景烨中国科学院上海应用物理研究所上海201800

以聚偏氟乙烯(PVDF)粉体为基材,采用预辐照接枝方法,在PVDF粉体上用乳液聚合接枝甲基丙烯酸缩水甘油酯(GMA),并采用溶液铸膜的方法制备了PVDF-g-PGMA膜。利用红外光谱(FTIR),扫描电子显微镜(SEM),压汞仪,电导率测试等分析表征手段对制备... 详细信息

以聚偏氟乙烯(PVDF)粉体为基材,采用预辐照接枝方法,在PVDF粉体上用乳液聚合接枝甲基丙烯酸缩水甘油酯(GMA),并采用溶液铸膜的方法制备了PVDF-g-PGMA膜。利用红外光谱(FTIR),扫描电子显微镜(SEM),压汞仪,电导率测试等分析表征手段对制备的PVDF-g-PGMA膜进行了表征。在氩气手套箱中组装成扣式电池,在电池测试系统上测试扣式电池的充放电循环性能。测试结果表明,在相同制备条件下,以PVDF-g-PGMA作为隔膜的锂离子电池性能优于以PVDF作为隔膜的锂离子电池性能。

关键词：锂离子电池隔膜聚偏氟乙烯聚甲基丙烯酸缩水甘油酯预辐照接枝

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Evolution of Weyl nodes in Ni-doped thallium niobate pyrochlore Tl_(2-x)Ni_(x)Nb_(2)O_(7)

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Science China(Physics,Mechanics & Astronomy) 2022年第9期65卷 104-111页

作者： Yuefang Hu Changming Yue Danwen yuan Jiacheng Gao Zhigao Huang Zhong Fang Chen Fang hongming Weng Wei Zhang Fujian Provincial Key Laboratory of Quantum Manipulation and New Energy Materials College of Physics and EnergyFujian Normal UniversityFuzhou 350117China Fujian Provincial Collaborative Innovation Center for Advanced High-Field Superconducting Materials and Engineering Fuzhou 350117China Department of Physics University of FribourgFribourg 1700Switzerland Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China Songshan Lake Materials Laboratory Dongguan 523808China

The magnetic Weyl semimetal(WSM)is important for fundamental physics and potential applications due to its spontaneous magnetism,robust band topology,and enhanced Berry *** possesses many unique quantum effects,including a large intrinsic anomalous Hall effect,Fermi arcs,and chiral *** this work,using ab initio calculations,we propose that Nidoped pyrochlore Tl2Nb2O7is a magnetic WSM caused by the exchange field splitting on bands around its quadratic band crossing *** exchange field tuned by Ni 3d on-site Coulomb interaction parameter U drives the evolution of Weyl nodes and the resulting topological phase *** Weyl nodes can exist at generic points in the Brillouin zone and are hard to identify exactly,their creation and annihilation,i.e.,the change in their number,chirality,and distribution,have been consistently confirmed with a combined theoretical approach,which employs parity criterion,symmetry indicator analysis,and the Wilson loop of the Wannier *** find that Weyl nodes remain in a large range of U and are close to the Fermi level,which makes the experimental observation very *** think that this method and our proposal of magnetic WSM will be useful in finding more WSMs and add to the understanding of the topological phase transition.

关键词： magnetic Weyl semimetal pyrochlore topological phase transition Chern number anomalous Hall effect

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CoPt-Co hybrid supported on amino modified SiO2 nanospheres as a high performance catalyst for hydrogen generation from ammonia borane

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Progress in Natural Science:Materials International 2019年第1期29卷 1-9页

作者： hongming Zhang Dandan Ke Lina Cheng Xuelei Feng Xuewei Hou Jin Wang yuan Li Shumin Han Heibei Key Laboratory of Applied Chemistry School of Environmental and Chemical Engineering Yanshan University State Key Laboratory of Metastable Materials Science and Technology Yanshan University

CoPt-Co hybrids were successfully supported on amino modified SiOnanospheres by a chemical reduction method at a temperature of 278 *** solid carrier *** modified SiO,provides numerous anchoring sites for the metal nanoparticles(NPs)to improve the dispersion while reducing the size of metal *** supported NPs displayed a narrow particle size distribution on the SiOsurface with an average diameter of 12 *** XRD results alongside with the binary alloy phase diagram suggest that the resulted NPs are bimetallic,composed of CoPt and amorphous *** the prepared materials,the solid with the specific composition of SiO@PtCowas proved to be effective catalyst for ammonia borane(AB)hydrolysis in aqueous *** turnover frequency(TOF)value of the supported nanocatalyst was 25.59molmin·mol,almost twice as that of unsupported PtCoNPs while the activation energy was 37.05 kJ ***,the SiO@PtCocomposite manifested high catalytic activity even after five cycles of reuse.

关键词： CoPt-Co hybrid catalyst Hydrogen generation NH3·BH3 hydrolysis SiO2 nanospheres

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慈溪潮塘江元代沉船保存状态研究

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文物保护与考古科学 2024年第1期36卷 120-129页

作者：陈岳徐宏鸣杨慧慧杨天有杜靖国家文物局考古研究中心北京100013 慈溪市文物保护中心浙江宁波315300

慈溪潮塘江元代沉船是慈溪地区迄今发现并经科学发掘的第一艘古代沉船,船体结构保存较为完整,现存10道隔舱壁板。通过14C测年进一步确认沉船所属时代为元代(1271年—1368年)。在沉船船体70个监测点位采集样品,从树种类型、木材化学组分... 详细信息

慈溪潮塘江元代沉船是慈溪地区迄今发现并经科学发掘的第一艘古代沉船,船体结构保存较为完整,现存10道隔舱壁板。通过14C测年进一步确认沉船所属时代为元代(1271年—1368年)。在沉船船体70个监测点位采集样品,从树种类型、木材化学组分、硫铁元素含量以及微生物病害种类等多个角度开展检测研究,全面调查分析沉船病害情况。结果表明,慈溪潮塘江元代沉船木材样品整体保存状态较好,由于长期处于内河道埋藏环境,木材处于饱水状态,最大含水率主要集中分布于185%~400%之间,局部区域呈现变色、变形、扭曲、开裂现象,木材化学组分呈现低综纤维素、高灰分的特点,含有少量硫铁元素,属于中度腐蚀状态,亟待开展盐分脱除与填充加固等船体保护工作。

关键词：潮塘江元代沉船病害调查保存状态评估沉船保护

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Catalytic effect of a novel MgC0.5Co3 compound on the dehydrogenation of MgH2

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Progress in Natural Science:Materials International 2021年第2期31卷 264-269页

作者： Yaokun Fu Zhenmin Ding Lu Zhang hongming Zhang Wenfeng Wang yuan Li Shumin Han Hebei Key Laboratory of Applied Chemistry School of Environmental and Chemical Engineering Yanshan University State Key Laboratory of Metastable Materials Science and Technology Yanshan University

The application of magnesium hydride(MgH) is limited due to the high reaction temperature and slow kinetics during dehydrogenation. In order to ameliorate the dehydrogenation property of MgH, MgCCocompound with induction and catalytic effects was introduced into the Mg/MgHsystem via ball-milling and hydriding combustion methods in present study. Compared to the pure MgH,the initial hydrogen desorption temperature of MgH–MgCCocomposite lowered to 237°C, decreasing by 141°C. At 325°C the MgH–MgCCocomposite could release 4.38 wt% Hwithin 60 min, which is 4.5 times the capacity of hydrogen released by as milled-MgH. Besides, the hydrogen desorption activation energy of the MgH–MgCCocomposite was dramatically reduced to 126.7 ± 1.4 k J/mol. It was observed that MgCCowas chemically stable and no chemical transformation occurred after cycling, which not only inhibited the nucleation and growth of composite particles, but also had a positive effect on the hydrogen desorption reaction of MgHdue to its catalytic *** study may provide references for designing and synthesizing Mg–C–Co alloy compound for the Mg-based hydrogen storage area.

关键词： Hydrogen storage materials Magnesium hydride Dehydrogenation performance MgC 0.5 Co 3 alloy compound

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Gate-tunable linear magnetoresistance in molybdenum disulfide field-effect transistors with graphene insertion layer

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Nano Research 2021年第6期14卷 1814-1818页

作者： Hao Huang hongming Guan Meng Su Xiaoyue Zhang yuan Liu Chuansheng Liu Zhihong Zhang Kaihui Liu Lei Liao Ning Tang School of Physics and Technology Wuhan UniversityWuhan430072China State Key Laboratory of Artificial Microstructure and Mesoscopic Physics School of PhysicsPeking UniversityBeijing100871China Key Laboratory for Micro-/Nano-Optoelectronic Devices of Ministry of Education School of Physics and ElectronicsHunan UniversityChangsha410082China

Molybdenum disulfide (MoS2) holds great promise as atomically thin two-dimensional (2D) semiconductor for future electronics and opto-electronics. In this report, we study the magnetoresistance (MR) of MoS2 field-effect transistors (FETs) with graphene insertion layer at the contact interface. Owing to the unique device structure and high-quality contact interface, a gate-tunable linear MR up to 67% is observed at 2 K. By comparing with the MRs of graphene FETs and MoS2 FETs with conventional metal contact, it is found that this unusual MR is most likely to be originated from the contact interfaces between graphene and MoS2, and can be explained by the classical linear MR model caused by spatial fluctuation of carrier mobility. Our study demonstrates large MR responses in MoS2-based systems through heterojunction design, shedding lights for the future magneto-electronics and van der Waals heterostructures.

关键词： molybdenum disulfide(MoS2) contact linear magnetoresistance graphene insertion layer mobility

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沉水植物水生态修复工程的水-气界面CO_(2)通量及生态效益研究——以武汉东湖为例

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环境科学学报 2024年第5期44卷 496-506页

作者：郑冰清孙彩云符洪铭吴振斌夏世斌王培武汉理工大学资源与环境工程学院武汉430070 中国科学院水生生物研究所武汉430072 桂林理工大学环境科学与工程学院桂林541006

为了探讨沉水植物水生态修复工程实施后是否具有CO_(2)减排效应及工程实施后的生态效益,以武汉市东湖水生态修复工程示范区为研究对象,通过野外调查与室内分析相结合的研究手段,探讨沉水植物修复工程实施后是否存在CO_(2)减排效应,并揭... 详细信息

为了探讨沉水植物水生态修复工程实施后是否具有CO_(2)减排效应及工程实施后的生态效益,以武汉市东湖水生态修复工程示范区为研究对象,通过野外调查与室内分析相结合的研究手段,探讨沉水植物修复工程实施后是否存在CO_(2)减排效应,并揭示环境因素如何影响水生态修复区碳减排通量.在此基础之上,根据全国碳市场碳排放配额(CEA)挂牌协议交易成交价对CO_(2)减排效应进行货币化,同时针对水生态修复净化水体营养盐的功能,结合修复区沉水植物对氮、磷营养盐削减的收益,估算沉水植物水生态修复工程的综合生态经济效益.结果显示,沉水植物修复区与未修复区日间水-气界面CO_(2)通量均值分别为-2.139×10^(-3)mg·m^(-2)·h^(-1)和3.316×10^(-3)mg·m^(-2)·h^(-1),沉水植物种植后水气界面CO_(2)通量下降了165%,表明以轮叶黑藻、苦草和金鱼藻为主的沉水植物水生态修复工程具有CO_(2)减排效应.Pearson相关性分析表明,修复区的水体CO_(2)浓度以及沉水植物生物量直接影响水-气界面CO_(2)通量;营养盐浓度(水体总氮和总磷)、水温、透明度和浊度间接影响水-气界面CO_(2)通量.在水生态修复区,沉水植物的光合作用主导了水-气界面CO_(2)通量的变化.估算结果表明,东湖水生态修复工程的年度综合经济效益预计达到44.50万元,该项目的投入产出比约为4.23,相当于降低了23.6%的工程建造成本,本研究从生态系统服务功能的角度扩展了沉水植物水生态修复工程的评价维度,为沉水植物水生态修复工程的发展提供理论指导和技术支撑.

关键词：水生态修复工程沉水植物静态箱法水-气界面CO_(2)通量 CO_(2)减排生态效益碳配额交易

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Peniazaphilones A—I,Produced by Co-culturing of Mangrove Endophytic Fungi,Penicillium sclerotiorum THSH-4 and Penicillium sclerotiorum ZJHJJ-18

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Chinese Journal of Chemistry 2021年第12期39卷 3404-3412页

作者： Wencong Yang Jie yuan Qi Tan Yan Chen Yujia Zhu hongming Jiang Ge Zou Zhenming Zang Bo Wang Zhigang She School of Chemistry Sun Yat-Sen UniversityGuangzhouGuangdong 510275China Department of Biochemistry Zhongshan School of MedicineSun Yat-Sen UniversityGuangzhouGuangdong 510080China Key Laboratory of Tropical Disease Control Sun Yat-Sen UniversityMinistry of EducationGuangzhouGuangdong 510080China National R&D Center for Edible Fungus Processing Technology Henan UniversityKaifengHenan 475004China

Co-culturing the mangrove endophytic fungus Penicillium sclerotiorum THSH-4 with Penicillium sclerotiorum ZJHJJ-18 in PDB medium resulted in the production of nine new azaphilones derivatives,peniazaphilones A—I(1-9),and six known azaphilones derivatives(10-15).Their structures were elucidated by analysis of detailed spectroscopic data,single-crystal X-ray diffraction,ECD spectra,^(13)C NMR calculation and DP4+*** is noteworthy that compound 1 with an isoquinoline quinone moiety,was isolated from natural source for the first ***,compound 2 is the third reported phenylhydrazone derivative from *** the bioactivity assays,compounds 1,12,14 and 15(IC_(50)=4.71-17.64μmol/L)exhibited potent inhibition of LPS-induced NO release from RAW264.7 without obvious cytotoxicity within 50μmol/L compared to the positive control indomethacin(IC_(50)=35.27μmol/L).Moreover,compounds 1 and 13 displayed moderate to strong cytotoxicity to A549 and MDA-MB-435,with IC_(50) values in the range of 6.84-14.63μmol/*** compound 1 showed moderate broad-spectrum antibacterial activity.

关键词： Co-culture Natural products Azaphilones Structure elucidation Cytotoxicity

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