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Copper-induced formation of heterostructured Co_(3)O_(4)/CuO hollow nanospheres towards greatly enhanced lithium storage performance

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Chinese Chemical Letters 2024年第2期35卷 594-598页

作者： Junjun Zhang Huiying Lu Tianhao Yao Xin Ji Qingmiao Zhang Lingjie Meng jianmin feng Hongkang Wang College of Geography & Environment Xianyang Normal UniversityXianyang 712000China State Key Lab of Electrical Insulation and Power Equipment Center of Nanomaterials for Renewable Energy (CNRE)School of Electrical EngineeringXi'an Jiaotong UniversityXi'an 710049China School of Chemistry Xi'an Key Laboratory of Sustainable Energy Material Chemistryand Instrumental Analysis CenterXi'an Jiaotong UniversityXi'an 710049China

We report a facile template-free fabrication of heterostructured Co_(3)O_(4)/CuO hollow nanospheres using pre-synthesized Co/Cu-glycerate as conformal precursor.The introduction of copper nitrate in the solvothermal reaction system of glycerol/isopropanol/cobalt nitrate readily induces the conversion from solid Co-glycerate to hollow Co/Cu-glycerate nanospheres,and the effect of the Co/Cu atomic ratio on the structure evolution of the metal glycerates as well as their corresponding oxides were investigated.When examined as anode materials for lithium-ion batteries,the well-defined Co_(3)O_(4)/CuO hollow nanospheres with Co/Cu molar ratio of 2.0 demonstrate excellent lithium storage performance,delivering a high reversible capacity of 930 mAh/g after 300 cycles at a current density of 0.5 A/g and a stable capacity of 650 mAh/g after 500 cycles even at a higher current density of 2.0 A/g,which are much better than their counterparts of bare CuO and Co_(3)O_(4).The enhanced lithium storage performance can be attributed to the synergistic effect of the CuO and Co_(3)O_(4)heterostructure with hollow spherical morphology,which greatly enhances the charge/electrolyte transfer and effectively buffers the volume changes upon lithiation/delithiation cycling.

关键词： Lithium-ion batteries Co/Cu-glycerate Hollow nanospheres Co_(3)O_(4)/CuO heterostructure Electrochemical properties

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Effect of Vacancy Defects on the Properties of CoS_(2) and FeS_(2)

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Journal of Wuhan University of Technology(Materials Science) 2024年第3期39卷 627-638页

作者：冯中营 ZHANG jianmin WANG Xiaowei YANG Wenjin JING Yinlan YANG Yan Department of Science Taiyuan Institute of TechnologyTaiyuan 030008China Computational Physics Research Center Taiyuan In-stitute of TechnologyTaiyuan 030008China College of Physics and Information Technology Shaanxi Normal UniversityXi’an 710119China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China Department of Physics College of ScienceNorth University of ChinaTaiyuan 030051China

In order to explore the effect of vacancy defects on the structural,electronic,magnetic and optical properties of CoS_(2) and FeS_(2),first-principles calculation method was used to investigate the alloys.The calculated results of materials without vacancy are consistent with those reported in the literatures,while the results of materials with vacancy defect were different from those of literatures due to the difference vacancy concentration.The Co vacancy defect hardly changes the half-metallic characteristic of CoS_(2).The Fe vacancy defect changes FeS_(2) from semiconductor to half-metal,and the bottom of the spin-down conduction band changes from the p orbital state of S to the d(t_(2g))orbital state of Fe,while the top of the valence band remains the d orbital d(eg)state of Fe.The half-metallic Co vacancy defects of CoS_(2) and Fe vacancy defects of FeS_(2) are expected to be used in spintronic devices.S vacancy defects make both CoS_(2) and FeS_(2) metallic.Both the Co and S vacancy defects lead to the decrease of the magnetic moment of CoS_(2),while both the Fe and S vacancy defects lead to the obvious magnetic property of FeS_(2).Vacancy defects enhance the absorption coefficient of infrared band and long band of visible light obviously,and produce obvious red shift phenomenon,which is expected to be used in photoelectric devices.

关键词： cobalt disulfide iron disulfide vacancy defect fist principles

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Ion-exchange-induced Bi and K dual-doping of TiOx in molten salts for high-performance electrochemical nitrogen reduction

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Journal of Energy Chemistry 2022年第6期31卷 26-34,I0002页

作者： Hao Li Liqun Wang Nan Li jianmin feng feng Hou Sihui Wang Ji Liang Key Laboratory for Advanced Ceramics and Machining Technology of Ministry of Education School of Materials Science and EngineeringTianjin UniversityTianjin 300350China Applied Physics Department College of Physics and Materials ScienceTianjin Normal UniversityTianjin 300387China School of Aeronautics and Astronautics Tianjin Sino-German University of Applied SciencesTianjin 300350China

Electrocatalytic nitrogen reduction reaction (e NRR) at the ambient conditions is attractive for ammonia(NH_(3)) synthesis due to its energy-efficient and eco-friendly features. However, the extremely strong N≡N triple-bonds in nitrogen molecules and the competitive hydrogen evolution reaction lead to the unsatisfactory NH_(3) yield and the Faradaic efficiency (FE) of e NRR, making the development of high-performance catalysts with adequate active sites and high selectivity essential for further development of e NRR.Addressing this, we herein report a Bi and K dual-doped titanium oxide (BTO@KTO) material, which is prepared by a cation exchange reaction between K_(2)Ti_(4)O_(5) and molten BiCl_(2), for high-performance e NRR catalysts. Benefiting from the controllable molten-salt cation exchange process, a highly active surface containing Bi/K sites and rich oxygen vacancies has been obtained on titanium oxide. Under the synergy of these two merits, an efficient e NRR catalysis, with the NH_(3) yield rate of 32.02 μg h^(-1)mg_(cat)^(-1) and the FE of 12.71%, has been achieved, much superior to that of pristine K_(2)Ti_(4)O_(9). This work thus offers a highperformance electrocatalyst for e NRR, and more importantly, a versatile cation-exchange strategy for efficiently manipulating materials’ functionalities.

关键词： Molten salt Electrocatalysis Nitrogen fixation Cation exchange Dual doping

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Genetic analysis and fine mapping of a grain size QTL in the smallgrain sterile rice line Zhuo201S

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Journal of Integrative Agriculture 2024年第7期23卷 2155-2163页

作者： Bin Lei Jiale Shao feng Zhang Jian Wang Yunhua Xiao Zhijun Cheng Wenbang Tang jianmin Wan College of Agronomy Hunan Agricultural UniversityChangsha 410128China National Key Facility for Crop Gene Resources and Genetic Improvement/Institute of Crop Sciences Chinese Academy of Agricultural SciencesBeijing 100081China State Key Laboratory for Crop Genetics and Germplasm Enhancement/Jiangsu Plant Gene Engineering Research Center Nanjing Agricultural UniversityNanjing 210095China State Key Laboratory of Hybrid Rice Hunan Hybrid Rice Research CenterChangsha 410125China

The development and application of the small-grain rice sterile line Zhuo201S(Z201S)has demonstrated its potential for mechanized hybrid rice seed production,leading to significant cost reductions.However,the molecular mechanism responsible for the small-grain size characteristic of Z201S remains unclear.In this study,we conducted a genetic analysis using near-isogenic lines constructed from Z210S,a small-grain rice sterile line,and R2115,a normal-grain variety.The results revealed that the small-grain trait in Z201S is governed by a single partially dominant gene which also enhances grain number.Through mapping,we localized the causal gene to the short arm of chromosome 2,within a 113 kb physical region delimited by the molecular markers S2-4-1 and LB63.Transgenic analysis and gene expression assays indicated LOC_Os02g14760 as the most likely candidate gene,suggesting that the small-grain size trait of Z201S is controlled by a novel locus that has not been previously identified.

关键词： rice grain size map-based cloning

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Pipeline Embolization Device for intracranial aneurysms presenting with mass effect:a large Chinese cohort

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Stroke & Vascular Neurology 2024年第1期9卷 50-58页

作者： Yang Zhao Junlin Lu Hongqi Zhang Tianxiao LI Donglei Song Sheng Guan Aisha Maimaitili Yunyan Wang Wenfeng feng Yang Wang Jieqing Wan Guohua Mao Huaizhang Shi Xinjian Yang jianmin Liu Yuanli Zhao Department of Neurosurgery Beijing Tiantan HospitalCapital Medical UniversityBeijingChina Department of Neurosurgery Peking University International HospitalBeijingChina Department of Neurosurgery West China HospitalSichuan UniversityChengduSichuanChina Department of Neurosurgery Xuanwu HospitalCapital Medical UniversityBeijingChina Department of Interventional Neuroradiology Zhengzhou University People's HospitalZhengzhouHenanChina Department of Neurosurgery Shanghai Donglei Brain HospitalShanghaiChina Department of Interventional Neuroradiology The First Affiliated Hospital of Zhengzhou UniversityZhengzhouHenanChina Department of Neurosurgery The First Affiliated Hospital of Xinjiang Medical UniversityUrumqiXinjiangChina Department of Neurosurgery Qilu Hospital of Shandong University QingdaoJinanShandongChina Department of Neurosurgery Nanfang HospitalSouthern Medical UniversityGuangzhouGuangdongChina Department of Neurosurgery The First Affiliated Hospital of Nanchang UniversityNanchangJiangxiChina Department of Neurosurgery Renji HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghaiChina Department of Neurosurgery The Second Affiliated Hospital of Nanchang UniversityNanchangJiangxiChina Department of Neurosurgery The First Affiliated Hospital of Harbin Medical UniversityHarbinHeilongjiangChina Department of Neurosurgery Changhai HospitalNaval Medical UniversityShanghaiChina

Background Unruptured intracranial aneurysm treatment aims to reduce the risk of aneurysm rupture and bleeding,relieves symptoms and improve the quality of life for patients.This study aimed to assess the safety and efficacy of Pipeline Embolization Device(PED,Covidien/Medtronic,Irvine,CA)treatment for intracranial aneurysms presenting with mass effect in real-world settings.Methods We selected patients from the PED in China Post-Market Multi-Center Registry Study with mass effect presentation.The study endpoints included postoperative mass effect deterioration and mass effect relief at follow-up(3–36 months).We conducted multivariate analysis to identify factors associated with mass effect relief.Subgroup analyses by aneurysm location,size and form were also performed.Results This study included 218 patients with a mean age of 54.3±11.8 years and a female predominance of 74.0%(162/218).The postoperative mass effect deterioration rate was 9.6%(21/218).During a median follow-up period of 8.4 months,the mass effect relief rate was 71.6%(156/218).Notably,immediate aneurysm occlusion following treatment was significantly associated with mass effect relief(OR 0.392,95%CI,0.170 to 0.907,p=0.029).Subgroup analysis demonstrated that adjunctive coiling contributed to mass effect relief in cavernous aneurysms,while dense embolism impeded symptom relief in aneurysms<10mm and saccular aneurysms.Conclusions Our data confirmed the efficacy of PED in relieving mass effect.The findings of this study provide support for endovascular treatment to alleviate mass effect in unruptured intracranial aneurysms.Trial registration number NCT03831672.

关键词： aneurysm intracranial Irvine

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Enhanced electrochemical stability of carbon-coated antimony nanoparticles with sodium alginate binder for sodium-ion batteries

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Progress in Natural Science:Materials International 2018年第2期28卷 205-211页

作者： jianmin feng Liqun Wang Dejun Li Pengyi Lu feng Hou Ji Liang Energy and Materials Engineering Center Institute of Physics and Materials Science Tianjin Normal University Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of Education School of Materials Science and Engineering Tianjin University Institute for Superconducting & Electronic Materials (ISEM) Australian Institute of Innovative Materials (AIIM) University of Wollongong Innovation Campus

The poor cycling stability of antimony during a repeated sodium ion insertion and desertion process is the key issue, which leads to an unsatisfactory application as an anode material in a sodium-ion battery. Addressed at this, we report a facile two-step method to coat antimony nanoparticles with an ultrathin carbon layer of few nanometers（denoted Sb@C NPs） for sodium-ion battery anode application. This carbon layer could buffer the volume change of antimony in the charge-discharge process and improve the battery cycle performance.Meanwhile, this carbon coating could also enhance the interfacial stability by firmly connecting the sodium alginate binders through its oxygen-rich surface. Benefitted from these advantages, an improved initial discharge capacity(788.5 mA h g;) and cycling stability capacity（553 mA hg-1 after 50 times cycle） have been obtained in a battery using Sb@C NPs as anode materials at 50 mA g;.

关键词： Sodium-ion battery Antimony Sodium alginate Liquid-phase reduction Carbon coating

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A flexible carbon nanotube@V_(2)O_(5) film as a high-capacity and durable cathode for zinc ion batteries

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Journal of Energy Chemistry 2021年第8期30卷 126-133,I0004页

作者： Xiaowei Wang Liqun Wang Bao Zhang jianmin feng Jiafeng Zhang Xing Ou feng Hou Ji Liang School of Metallurgy and Environment Central South UniversityChangsha 410083China College of Physics and Materials Science Tianjin Normal University300387 TianjinChina Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of Education School of Materials Science and EngineeringTianjin University300072 TianjinChina Institute for Superconducting&Electronic Materials(ISEM) Australian Institute of Innovative Materials(AIIM)Innovation CampusSquires WayUniversity of Wollongong2522 Australia

Aqueous zinc-ion batteries(ZIBs)are receiving a continuously increasing attention for mobile devices,especially for the flexible and wearable electronics,due to their non-toxicity,non-flammability,and low-cost features.Despite the significant progress in achieving higher capacities for electrode materials of ZIBs,to endow them with high flexibility and economic feasibility is,however,still a significant challenge remaining unsolved.Herein,we present a highly flexible composite film composed of carbon nanotube film and V_(2)O_(5)(CNTF@V_(2)O_(5))with high strength and high conductivity,which is prepared by simply impregnating a porous CNT film with an aqueous V_(2)O_(5)sol under vacuum.For this material,intimate incorporation between V_(2)O_(5)and CNTs has been achieved,successfully integrating the high zinc ion storage capability with high mechanical flexibility.As a result,this CNTF@V_(2)O_(5)film delivers a high capacity of 356.6 m Ah g^(-1)at 0.4 A g^(-1)and excellent cycling stability with 80.1%capacity retention after 500 cycles at 2.0 A g^(-1).The novel strategy and the outstanding battery performance presented in this work should shed light on the development of high-performance and flexible ZIBs.

关键词： Zinc-ion batteries Carbon nanotube films Flexible cathode Wearable devices

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人工智能时代机器人结直肠癌手术的现状及进展

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中华消化外科杂志 2024年第4期23卷 573-578页

作者：毛翌皓冯青阳许剑民复旦大学附属中山医院结直肠外科上海结直肠肿瘤微创工程技术研究中心复旦大学附属中山医院肿瘤防治中心上海200032

近年来机器人结直肠癌手术快速发展成熟,手术量快速增长,手术种类也不断丰富.越来越多的高级别循证医学证据显示:机器人结直肠癌手术,尤其是机器人直肠癌手术显著加速术后康复、降低并发症发生、提高术后生命质量且降低环周切缘阳性率,... 详细信息

近年来机器人结直肠癌手术快速发展成熟,手术量快速增长,手术种类也不断丰富.越来越多的高级别循证医学证据显示:机器人结直肠癌手术,尤其是机器人直肠癌手术显著加速术后康复、降低并发症发生、提高术后生命质量且降低环周切缘阳性率,进而提升肿瘤根治效果.近年来,随着医学人工智能(AI)技术的快速发展,AI增强手术、AI自主机器人手术等在机器人结直肠癌手术领域中也有早期探索与尝试.笔者针对机器人结直肠癌手术的发展历程、目前开展的现状,以及AI技术在机器人结直肠癌手术中的应用展开深入探讨.

关键词：结肠肿瘤直肠肿瘤机器人手术人工智能进展

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A novel approach in preparing polymer/nano-CaCO_(3) composites

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Frontiers of Chemical Science and Engineering 2008年第1期2卷 115-122页

作者： Zhengying LIU Runze YU Mingbo YANG jianmin feng Wei YANG Bo YIN College of Polymer Science and Engineering State Key Laboratory of Polymer Materials EngineeringSichuan UniversityChengdu 610065China

An novel compounding process using nano-CaCO_(3) aqueous suspension for preparing polymer/nano-CaCO_(3) composites with nanoparticles dispersed at the nanoscale is reported.The process is called the mild mixing method.In this method,the pre-dispersed nano-particle suspensions are blended with melting polymers in a weak shearing field using an extruder,followed by removing the water from the vent.The four typical poly-meric nanocomposites were prepared by mild mixing method.The dispersion of nano-CaCO_(3) in the matrix of the polymer at the nanoscale was confirmed by scanning electron microscopy(SEM).The molecular weights of polycarbonate(PC)and its nanocomposite showed that the degradation had not occurred during the mild mixing processing.The mechanical properties of the composite with 1.5 wt-% nano-CaCO_(3) improve slightly.It proved that this approach is suitable for the preparation of nano-composites based on both polar and non-polar polymers.

关键词： nanoparticles mild mixing polar and non-polar polymer dispersion

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新时期我国高等教育推进产教融合的内在逻辑、现实困境与创新举措

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山东高等教育 2024年第1期12卷 17-24,88,89页

作者：冯建民张伟源济南大学高等教育研究院山东济南250000 济南大学教育与心理科学学院山东济南250000

产教融合是在新时代促进教育优先发展、人才引领发展、产业创新发展的战略性举措,是推动国家高质量发展的战略引擎。产教融合促进了教育和社会之间的互动,是教育与社会互动规律本质体现,是新时代产业转型升级的迫切需求,更是教育生态系... 详细信息

产教融合是在新时代促进教育优先发展、人才引领发展、产业创新发展的战略性举措,是推动国家高质量发展的战略引擎。产教融合促进了教育和社会之间的互动,是教育与社会互动规律本质体现,是新时代产业转型升级的迫切需求,更是教育生态系统结构优化关键所在和多主体协同育人的必然要求。但在产教融合具体实践中却出现了缺乏广泛共识的理念偏离、难以落地实施的政策偏离、封闭办学惯性的定位偏离、流于表面形式的运行偏离等四个方面的偏离表征。推进新时代产教融合深入发展,助推高质量发展,须强化顶层设计,形成协同发展新共识,完善落实政策,激发产教融合新活力,坚持系统观念,打造产教融合新模式,深化机制改革,构建产教融合新平台,借助“双创”教育,赋予产教融合新动能。

关键词：新时代产教融合偏离表征创新举措

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