检索结果-南通市图书馆

Nano Research 2024年第6期17卷 5224-5232页

作者： jianmei han Hua Zhang Peng Wang Ning Song Xuguang An Baojuan Xi Shenglin Xiong College of Chemistry and Chemical Engineering Taishan UniversityTai’an 271021China Key Laboratory of the Colloid and Interface Chemistry Ministry of Educationand School of Chemistry and Chemical EngineeringShandong UniversityJinan 250100China School of Mechanical Engineering Chengdu UniversityChengdu 610106China

The application of light-weight current collectors is preferred because of the increased energy density of the *** it in mind,the cathode is designed with self-made paperlike memberane as current collector coupled with another interlayer to enable the high-energy-density lithium-sulfur *** a facile and green step-by-step methodology,the hybrid membrane is finalized successfully,consisting of reduced graphene oxide sheets covering paper-derived carbon(GPC)bearing Fe@Fe2O3 and Fe1−xS@Fe2O3 core-shell nanoparticles(FeFeO/FeSFeO@GPC).The film works as the current collector and interlayer simultaneously considering the porous and conductive *** demonstrated by the electrochemical testing,the FeFeO/FeSFeO@GPC hybrid cell exhibits attractive cycling stability and superior rate *** cell configuration and structural/composition merits of FeFeO/FeSFeO@GPC film facilitate the faster reaction kinetics,conducive to the improvement of capacity *** view of the effective cathode design,the areal sulfur loading is increased to 10.46 mg·cm^(−2)and a reversible capacity of 6.67 mAh·cm^(−2)can be retained after 60 cycles at 0.1 C.

关键词： light-weight self-made current collector core-shell high-areal-sulfur lithium-sulfur batteries

Loading Fe3O4 nanoparticles on paper-derived carbon scaffold toward advanced lithium-sulfur batteries

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2021年第1期30卷 1-11,I0001页

作者： jianmei han Qiang Fu Baojuan Xi Xuyan Ni Chenglin Yan Jinkui Feng Shenglin Xiong Key Laboratory of Colloid and Interface Chemistry Ministry of EducationSchool of Chemistry and Chemical Engineeringand State Key Laboratory of Crystal MaterialsShandong UniversityJinan 250100ShandongChina Soochow Institute for Energy and Materials InnovationS College of EnergySoochow UniversitySuzhou 215006JiangsuChina Key Laboratory for Liquid-solid Structural Evolution&Processing of Materials(Ministry of Education) Shandong UniversityJinan 250061ShandongChina College of Chemistry and Chemical Engineering Taishan UniversityTai’an 271021ShandongChina

Lithium-sulfur batteries(LSBs) are regarded as a competitive next-generation energy storage ***, their practical performance is seriously restricted due to the undesired polysulfides ***, a multifunctional interlayer composed of paper-derived carbon(PC) scaffold, Fe3O4 nanoparticles,graphene, and graphite sheets is designed for applications in LSBs. The porous PC skeleton formed by the interweaving long-fibers not only facilitates fast transfer of Li ions and electrons but also provides a physical barrier for the polysulfide shuttling. The secondary Fe3O4@graphene component can reduce the polarization, boost the attachment of polysulfides, and promote the charging-discharging kinetics. The outer graphitic sheets layers benefit the interfacial electrochemistry and the utilization of S-containing *** efficient obstruction of polysulfides diffusion is further witnessed via in situ ultraviolet-visible characterization and first-principles simulations. When 73% sulfur/commercial acetylene black is used as the cathode, the cell exhibits excellent capacity retention with high capacities at 0.5 C for 1000 cycles and even up to 10 C for 500 cycles, an ultrahigh rate capability up to 10 C(478 m Ah g-1), and a high arealsulfur loading of 8.05 mg cm-2. The strategy paves the way for developing multifunctional composites for LSBs with superior performance.

关键词： Paper-derived carbon nanosheets Fe3O4 Lithium-sulfur batteries Multifunctional interlayer Polysulfides

Performance optimization of chalcogenide catalytic materials in lithium-sulfur batteries:Structural and electronic engineering

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2024年第7期35卷 147-166页

作者： jianmei han Peng Wang Hua Zhang Ning Song Xuguang An Baojuan Xi Shenglin Xiong College of Chemistry and Chemical Engineering Taishan UniversityTai'an 271021China Key Laboratory of Colloid and Interface Chemistry Ministry of EducationSchool of Chemistry and Chemical EngineeringShandong UniversityJi'nan 250100China School of Mechanical Engineering Chengdu UniversityChengdu 610106China

Lithium-sulfur batteries(LSBs)boasting remarkable energy density have garnered significant attention within academic and industrial ***,the progression of LSBs remains constrained by the languid redox kinetics intrinsic to sulfur and the pronounced shuttle effect induced by lithium polysulfides(Li PSs),which seriously affecting the energy density,cycling life and rate *** conceptualization and implementation of catalytic materials stand acknowledged as a propitious stratagem for orchestrating kinetic modulation,particularly in excavating the conversion of LiPSs and has evolved into a focal point for *** them,chalcogenide catalytic materials(CCMs)have shown satisfactory catalytic effects ascribe to the unique physicochemical properties,and have been extensively developed in recent *** the lack of systematic summary regarding the development of CCMs and corresponding performance optimization strategies,herein,we initiate a comprehensive review regarding the recent progress of CCMs for effective collaborative immobilization and accelerated transformation kinetics of Li *** that,the modulation strategies to improve the catalytic activity of CCMs are summarized,including structural engineering(morphology engineering,surface/interface engineering,crystal engineering)and electronic engineering(doping and vacancy,etc.).Finally,the application prospect of CCMs in LSBs is clarified,and some enlightenment is provided for the reasonable design of CCMs serving practical LSBs.

关键词： Lithium-sulfur batteries Chalcogenide Catalytic materials Lithium polysulfides Structural engineering Electronic engineering

Versatile boron-based thermally activated delayed fluorescence materials for organic light-emitting diodes

在线全文

学校读者我要写书评

暂无评论

Aggregate

Aggregate 2022年第5期3卷 100-129页

作者： jianmei han Yanying Chen Nengquan Li Zhongyan Huang Chuluo Yang Shenzhen Key Laboratory of Polymer Science and Technology College of Materials Science and EngineeringShenzhen UniversityShenzhenPeople’s Republic of China

During the last few years,organoboron-based thermally activated delayed fluorescence(TADF)materials have received extensive attention in optoelectronic area,owing to the unique electronegativity of boron ***,many research progress of organoboron-based TADF materials for organic optoelectronic devices is *** review comprehensively documents the organoboron-based TADF materials according to the emission colors from blue to red-near-infrared(red-NIR),covering the molecular design strategies,photophysical properties,and optoelectronic performance in organic light-emitting diodes(OLEDs).The current progress and future challenges in this fast-growing fields are reviewed systematically,providing instructive guidance for the future research on high-performance TADF-OLEDs.

关键词： narrow-band emission organic light-emitting diodes organoboron thermally activated delayed fluorescence

Analysis of High-Frequency Ultrasound in the differential Diagnosis of Lumps in Foot and hand

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Proceedings of Anticancer Research 2020年第4期4卷 27-31页

作者： Huitong Yan Heying Li jianmei han Yingbo Tang Affiliated Liangxiang Teaching Hospital of Capital Medical University Beijing 102401China

Objective:To investigate the ultrasonogram characteristics of common lumps in hand and foot,pursuing for greater understanding of hand and foot ***:65 cases of ultrasonographic characteristics of lumps in hand and foot were retrospectively analyzed,including the location,size,shape,boundary,internal echo and posterior echo,surrounding relationship and blood ***:Among 65 cases,there were 26 cases of tendon sheath cyst,16 cases of tenosynovitis giant cell tumor,10 cases of hemangioma,4 cases of tendon sheath fibroma,3 cases of epidermoid cyst,2 cases of Schwannoma,2 cases of fibrolipoma,1 case of angiolipoma and 1 case of *** preoperative and postoperative pathological diagnoses of 45 cases,accounting for 69.23%,were consistent,3 cases(4.62%)were misdiagnosed,which included that 2 cases of tenosynovitis giant cell tumor were misdiagnosed as tendon sheath cyst,1 case of neurofibroma as epidermoid cyst,and the preoperative diagnosis of the rest 17 cases(26.15%)were ***:The high-frequency ultrasound can diagnose properties of lumps in foot and hand well,providing diagnosis basis for further treatment in clinic.

关键词： High-frequency ultrasound Lumps hand and foot Publication

单宁酸-端氨基聚氧化丙烯纳米粒子/琼脂糖复合冷冻凝胶的制备及性能

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

复合材料学报 2023年第3期40卷 1649-1654页

作者：王立伟于雪莹韩健美何炜大连理工大学精细化工国家重点实验室大连116023 大连理工大学化工学院大连116023

为拓展琼脂糖基冷冻凝胶的生物功能,本文秉承便捷环保的理念,将原位制备的植物多酚单宁酸(TA)-端氨基聚氧化丙烯(D400)纳米粒子的分散液与琼脂糖溶液简单共混,采用冷冻凝胶技术成功制备新型复合冷冻凝胶(ATD),并研究TA-D400纳米粒子形... 详细信息

为拓展琼脂糖基冷冻凝胶的生物功能,本文秉承便捷环保的理念,将原位制备的植物多酚单宁酸(TA)-端氨基聚氧化丙烯(D400)纳米粒子的分散液与琼脂糖溶液简单共混,采用冷冻凝胶技术成功制备新型复合冷冻凝胶(ATD),并研究TA-D400纳米粒子形成时间(0h vs 24 h)对冷冻凝胶(即ATD-0和ATD-24)性能的影响。结果表明:ATD复合冷冻凝胶具有互通的大孔结构和粗糙的孔壁,纳米粒子均匀分散在琼脂糖基质中;冷冻凝胶ATD-0和ATD-24的储能模量分别为1.8 kPa和0.8 kPa,显著高于未复合的琼脂糖凝胶;优异的1,1-二苯基-2-苦基肼(DPPH)自由基清除效果和铁离子还原/抗氧化能力分析法表征结果共同证实ATD的抗氧化功能。同时,在H2O2刺激成纤维细胞的实验中,ATD的抗氧化作用改善了细胞的存活率;此外,细胞黏附实验表明ATD支持成纤维细胞、前成骨细胞和原代皮质神经元等多种细胞的黏附。综上所述,TA-D400纳米粒子的引入实现了对琼脂糖凝胶的双重功能化,此类ATD复合冷冻凝胶有望成为组织工程领域的新型多孔支架材料。

关键词：琼脂糖单宁酸端氨基聚醚纳米粒子冷冻凝胶抗氧化细胞黏附

同方期刊数据库

海口市三级甲等医院专科护士职业认同状况及其影响因素的调查研究

在线全文

学校读者我要写书评

暂无评论

中国护理管理 2017年第2期17卷 229-234页

作者：白芳韩健美刘可海南医学院附属医院口腔科海口市570100 中山大学护理学院海南医学院附属医院护理部海口市570100

目的 :调查海口市三级甲等医院专科护士职业认同现状;分析影响专科护士职业认同状况的因素。方法 :采用描述性研究的方法,对海口市全部三级甲等医院内的198名专科护士进行问卷调查,调查工具为护士职业认同量表中文版。结果 :专科护士职... 详细信息

目的 :调查海口市三级甲等医院专科护士职业认同现状;分析影响专科护士职业认同状况的因素。方法 :采用描述性研究的方法,对海口市全部三级甲等医院内的198名专科护士进行问卷调查,调查工具为护士职业认同量表中文版。结果 :专科护士职业认同得分为(5.70±0.62)分,各维度标准化得分由高到低为:自我决定感、组织影响感、有意义感、自我效力感、患者影响感、把握感、一致感;各领域专科护士职业认同得分在5.23~6.20之间;职务、性别、岗位津贴、专科领域、继续教育、学术交流、发表论文情况进入回归方程,联合解释总变异量的35.8%。结论 :海口市三级甲等综合医院专科护士的职业认同感处于较高水平。其中自我决定感得分最高,一致感得分最低。不同专科领域的专科护士职业认同有差异。重症专科领域的专科护士职业认同高。护士长、男性、有岗位津贴、重症专业、参加继续教育及学术交流、有发表论文的专科护士职业认同感高。

关键词：专科护士职业认同

在线全文

学校读者我要写书评

暂无评论

捕捉精彩生成资源焕发英语课堂活力

英语教师 2019年第19期19卷 136-138,141页

作者：韩建梅浙江省天台县白鹤中学

从"生成资源"的角度出发,结合具体教学实例,从促进动态资源生成、捕捉各种生成资源、鼓励学生创新三个方面探究如何在英语课堂教学中灵活运用生成资源.提出课前精心预备、巧用契机、不急于纠错的策略.

关键词：生成资源英语课堂动态资源

聚醚胺ED900-单宁酸构建表面微结构化复合涂层及其细胞相容性的研究

在线全文

学校读者我要写书评

暂无评论

复合材料学报 2023年第1期40卷 396-406页

作者：韩健美夏雨祥程昉何炜大连理工大学精细化工国家重点实验室大连116023 大连理工大学化工学院大连116023

为改善医用材料的生物相容性并赋予材料表面一定的生物学功能,本文以单宁酸(TA)和聚醚胺ED900为组装单元,通过层层自组装的方法制备了复合涂层。采用纳米粒度仪、Zeta电位分析仪、紫外分光光度计、红外光谱、石英晶体微天平(QCM-D)、扫... 详细信息

为改善医用材料的生物相容性并赋予材料表面一定的生物学功能,本文以单宁酸(TA)和聚醚胺ED900为组装单元,通过层层自组装的方法制备了复合涂层。采用纳米粒度仪、Zeta电位分析仪、紫外分光光度计、红外光谱、石英晶体微天平(QCM-D)、扫描电子显微镜等仪器对ED900-TA复合溶液行为及复合涂层的理化性质进行表征。通过细胞实验考察了涂层对细胞行为的影响。利用1,1-二苯基-2-三硝基苯肼(DPPH)法和总抗氧化能力检测试剂盒(FRAP)法评价了涂层的抗氧化性。最后,分别通过琼脂糖插入实验和细胞培养液浸泡研究涂层的稳定性。结果表明:ED900-TA涂层具有良好的细胞相容性和抗氧化性,表面的微结构呈现调控亲/憎细胞的能力。此外,涂层在模拟植入的过程未出现脱落。并在细胞培养条件下,涂层形貌在21天的评价周期内无显著变化。该复合涂层为生物材料表面多功能化提供了新思路。

关键词：聚醚胺单宁酸层层自组装技术表面改性细胞-材料相互作用抗氧化

在线全文

学校读者我要写书评

暂无评论

海洋弧菌Ag-1产琼胶酶条件研究

中国食品学报 2017年第3期17卷 90-95页

作者：张建美韩尧跃王国增叶秀云林娟福州大学福建省海洋酶工程重点实验室福州350116

以课题组从龙须菜中分离得到的产琼胶酶弧菌Ag-1为试验菌株,对其产酶培养基和发酵条件进行研究,得到优化后的培养基配方和培养条件为:琼脂0.2%,蛋白胨0.3%,酵母膏0.8%,NaCl 4.0%,MgSO_40.6%,CaCl_20.2%;培养基初始pH 6.5,接种量1%(体积... 详细信息

以课题组从龙须菜中分离得到的产琼胶酶弧菌Ag-1为试验菌株,对其产酶培养基和发酵条件进行研究,得到优化后的培养基配方和培养条件为:琼脂0.2%,蛋白胨0.3%,酵母膏0.8%,NaCl 4.0%,MgSO_40.6%,CaCl_20.2%;培养基初始pH 6.5,接种量1%(体积分数),摇床转速240 r/min,装液量50 m L/250 m L,发酵温度33℃,发酵周期24 h。在此条件下做发酵产酶试验,琼胶酶活力达45.51 U/m L,较优化前的7.0 U/m L提高了5.5倍。

关键词：弧菌琼胶酶培养基优化产酶条件优化