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Conversion of magnetron-sputtered sacrificial intermediate layer into a stable FeCo-LDH catalyst for oxygen evolution reaction

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Nano Research 2024年第5期17卷 4307-4313页

作者： Zhiquan Lang Guang-Ling Song Xingpeng Liao Wenzhong Huang yixing zhu Haipeng Wang Dajiang Zheng Center for Marine Materials Corrosion and Protection College of MaterialsXiamen UniversityXiamen 361005China Department of Ocean Science and Engineering Southern University of Science and TechnologyShenzhen 518055China State Key Laboratory of Physical Chemistry of Solid Surfaces Xiamen UniversityXiamen 361005China The University of Queensland St.LuciaOLD 4072Australia State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Department of Mechanical Engineering Tsinghua UniversityBeijing 100084China

Controllable and scalable preparation of electrocatalyst materials holds significant importance for their practical *** sputtering is a highly effective synthesis method,known for its producing uniform films and allowing easy control of component *** this paper,we propose an in-situ synthesis method for layered double hydroxide(LDH)electrocatalysts through sacrificing magnetron sputtered *** resulting FeCo-LDH catalyst demonstrated a low overpotential of only 300 mV at 10 mA·cm^(-2).Furthermore,we conducted spectroscopic analysis to investigate the surface changes of the catalysts during the oxygen evolution reaction(OER)*** findings indicated that the formation of Co oxyhydroxides plays a beneficial role in enhancing the catalytical performance of the FeCo-LDH for OER *** restructuring strategy of converting a magnetron-sputtered sacrificial film into a catalytical LDH introduces a new avenue to the synthesis of transition metal-based electrocatalysts.

关键词： magnetron co-sputtering surface reconstruction electrocatalyst oxygen evolution reaction

Interactions between the lung microbiome and host immunity in chronic obstructive pulmonary disease

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Chronic Diseases and Translational Medicine 2023年第2期9卷 104-121页

作者： yixing zhu De Chang Graduate School of The PLA General Hospital BeijingChina Department of Respiratory and Critical Care Medicine Eighth Medical CenterDepartment of Respiratory and Critical Care Seventh Medical CenterChinese PLA General HospitalBeijingChina

Chronic obstructive pulmonary disease(COPD)is a common chronic respiratory disease and the third leading cause of death *** in next-generation sequencing technology have improved microbiome analysis,which is increasingly recognized as an important component of disease *** to the gut,the lung is a biosphere containing billions of microbial *** lung microbiome plays an important role in regulating and maintaining the host immune *** microbiome composition,metabolites of microorganisms,and the interactions between the lung microbiome and the host immunity profoundly affect the occurrence,development,treatment,and prognosis of *** this review,we drew comparisons between the lung microbiome of healthy individuals and that of patients with ***,we summarize the intrinsic interactions between the host and the overall lung microbiome,focusing on the underlying mechanisms linking the microbiome to the host innate and adaptive immune response ***,we discuss the possibility of using the microbiome as a biomarker to determine the stage and prognosis of COPD and the feasibility of developing a novel,safe,and effective therapeutic target.

关键词： adaptive immune response chronic obstructive pulmonary disease innate immune response microbiome

Microstructural evolution and its influence on mechanical and corrosion behaviors in a high-Al/Zn containing duplex Mg-Li alloy after friction stir processing

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Journal of Materials Science & Technology 2024年第17期184卷 245-255页

作者： yixing zhu Mengran Zhou Yingxin Geng Shun Zhang Tongzheng Xin Gaoqiang Chen Yifan Zhou Xiaoyu Zhou Ruizhi Wu Qingyu Shi State Key Laboratory of Clean and Efficient Turbomachinery Power Equipment Department of Mechanical EngineeringTsinghua UniversityBeijing 100084China Key Laboratory for Advanced Materials Processing Technology Ministry of EducationBeijing 100084China Key Laboratory of Superlight Materials&Surface Technology(Ministry of Education) Harbin Engineering UniversityHarbin 150001China Key Laboratory of Solidification Control and Digital Preparation Technology(Liaoning Province) School of Materials Science and EngineeringDalian University of TechnologyDalian 116024China Beijing North Vehicle Group Corporation Beijing 100072China

Ultralight Mg-Li alloys offer promising applications across various ***-Li alloys enriched with Al and Zn hold theoretical potential for achieving excellent mechanical strength and corrosion ***,the structural and performance characteristics of such Mg-Li alloys,particularly after thermo-mechanical processing,remain inadequately explored and *** study investigated the mi-crostructural evolution of a Mg-9Li-5Al-4Zn alloy after friction stir processing and its consequent effects on the mechanical and corrosion *** grain size of the alloy was effectively refined and sta-bilized during friction stir processing at various heat *** yield strength of the alloy increased by 86.4%after friction stir processing under the highest heat input condition,which was attributed to fine grain strengthening,solid solution strengthening and dispersion ***,the alloy ex-perienced a slight decrease in elongation after the friction stir *** alloy subjected to friction stir processing with the highest heat input exhibited a minimal corrosion current density of 6.10×10^(−6) A/cm^(2),which was only 25%of the base *** enhanced anti-corrosion properties can be attributed to the dispersion and distribution of precipitated particles induced by friction stir processing,which hin-dered the micro-galvanic corrosion and promoted the generation of a compact surface film,leading to minimal and uniform *** investigation can be significant for understanding the metallurgical mechanisms and performance evolution of Mg-Li alloys during thermomechanical processes.

关键词： Mg-Li-Al-Zn alloy Friction stir processing Microstructure evolution Thermal-mechanical stability Corrosion behavior

Insight the long-term biodegradable Mg-RE-Sr alloy for orthopaedics implant via friction stir processing

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Bioactive Materials 2024年第11期41卷 293-311页

作者： yixing zhu Mengran Zhou Weikang Zhao Yingxin Geng Yujie Chen Han Tian Yifan Zhou Gaoqiang Chen Ruizhi Wu Yufeng Zheng Qingyu Shi State Key Laboratory of Clean and Efficient Turbomachinery Power Equipment Department of Mechanical EngineeringTsinghua UniversityBeijing100084PR China Key Laboratory for Advanced Materials Processing Technology Ministry of EducationBeijing100084PR China Department of Orthopedics The First Affiliated Hospital of Chongqing Medical UniversityChongqing400016PR China Key Laboratory of Superlight Materials&Surface Technology(Ministry of Education) Harbin Engineering UniversityHarbin150001PR China School of Materials Science and Engineering Peking UniversityBeijing100871PR China

Magnesium alloys,noted for their substantial mechanical strength and exceptional biocompatibility,are increasingly being considered for use in biodegradable ***,their rapid degradation and significant hydrogen release have limited their applications in *** this study,a novel Mg-RE-Sr alloy was created by friction stir processing to modify its microstructure and enhance its degradation *** microstructural characterization,the friction stir processing effectively refined the grains,accelerated the re-dissolution of precipitates,and ensured a uniform distribution of these *** processed alloy demonstrated improved comprehensive properties,with an in vitro corrosion rate of approximately 0.4 mm/y and increases in ultimate tensile strength and elongation by 37%and 166%,***,in vivo experiments involving a rat subcutaneous implantation model revealed a slower degradation rate of 0.09 mm/y and a uniform degradation process,basically achieving the requirements for ideal performance in orthopaedic *** superior degradation characteristics were attributed to the synergistic effect of attenuated galvanic corrosion and the formation of a dense Y(OH)3/Y2O3 film induced by an exceptional microstructure with a highly solid-soluted matrix and uniformly refined ***,the alloys exhibited excellent biocompatibility and did not cause undesirable inflammation or produce toxic degradation *** improvements in biocompatibility and degradation characteristics indicate great promise for the use of this friction stir processed alloy in osteosynthesis systems in the clinical setting.

关键词： Magnesium alloy Friction stir processing Microstructural evolution Biodegradable Biocompatibility

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新型冠状病毒关注变异株抗体反应研究

中国医学科学院学报 2023年第3期45卷 454-463页

作者：朱衣兴常德中国人民解放军总医院第八医学中心呼吸与危重症医学部北京100026 中国人民解放军总医院第七医学中心呼吸与危重症医学科北京100091

迄今为止,新型冠状病毒感染大流行已有3年,累计感染约7亿人,造成600多万人死亡,给人类社会造成了极大的影响。据全球共享流感数据倡议组织统计,SARS-CoV-2的变异序列超过1200万种,其中影响力最大的是5种关注变异株:Alpha、Beta、Gamma、... 详细信息

迄今为止,新型冠状病毒感染大流行已有3年,累计感染约7亿人,造成600多万人死亡,给人类社会造成了极大的影响。据全球共享流感数据倡议组织统计,SARS-CoV-2的变异序列超过1200万种,其中影响力最大的是5种关注变异株:Alpha、Beta、Gamma、Delta以及Omicron。它们的传染性、致病性及中和抗性相对于原始株都有极大的改变,给疫情防控带来了极大的压力。抗体水平检测对确诊感染、流行病学调查、疫苗研发和中和药物的制备有着至关重要的意义。本文从SARS-CoV-2的体液免疫出发,简要总结了5种关注变异株的突变位点、中和抗性和疫苗效果,并简要探讨了SARS-CoV-2的进化特征、未来变异方向及宿主免疫。

关键词：新型冠状病毒关注变异株抗体疫苗中和抗体

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MR诊断卵巢囊性病变的临床应用价值

中国医药科学 2020年第9期10卷 175-177页

作者：朱义兴福建医科大学附一闽南医院福建泉州362800

目的探讨应用MR检查对卵巢囊性病变进行诊断的临床价值。方法选取2018年1月~2019年6月于我院进行诊疗的92例疑似卵巢囊性病变患者为分析对象,对纳入患者行MR检查,并以病理检查结果和治疗随访结果为最终诊断。观察MR检查诊断卵巢囊性病... 详细信息

目的探讨应用MR检查对卵巢囊性病变进行诊断的临床价值。方法选取2018年1月~2019年6月于我院进行诊疗的92例疑似卵巢囊性病变患者为分析对象,对纳入患者行MR检查,并以病理检查结果和治疗随访结果为最终诊断。观察MR检查诊断卵巢囊性病变的准确性,并分析其图像特点和诊断价值。结果与最终诊断结果比较,MR检查的诊断灵敏度为97.14%,特异度为90.91%,整体诊断符合率为95.65%。MR检查对不同卵巢囊性病变类型的检出率均达到90%以上,整体检出率为92.86%,各病变类型的MR图像信号具有明显特点。结论MR检查对于卵巢囊性病变的诊断准确性较高,图像信号特征性明显,可为卵巢囊性病变的诊断和鉴别提供重要依据,有良好诊断价值。

关键词： MR 卵巢囊性病变病理检查随访临床诊断

搅拌摩擦加工调控Mg-5Zn-0.6Zr合金耐蚀性的研究

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材料导报 2024年第10期38卷 151-156页

作者：龙飞刘瞿朱艺星周梦然陈高强史清宇清华大学机械工程系清洁高效透平动力装备全国重点实验室北京100084 先进成形制造教育部重点实验室北京100084

作为一种储量足、比强度和比模量高的轻质结构材料和功能材料,镁的应用前景十分广阔,然而镁的耐蚀性不佳严重限制了其应用范围,较大尺寸的沉淀相导致的电偶腐蚀是镁合金耐蚀性不佳的重要原因。本工作选取铸态Mg-5Zn-0.6Zr合金作为研究对... 详细信息

作为一种储量足、比强度和比模量高的轻质结构材料和功能材料,镁的应用前景十分广阔,然而镁的耐蚀性不佳严重限制了其应用范围,较大尺寸的沉淀相导致的电偶腐蚀是镁合金耐蚀性不佳的重要原因。本工作选取铸态Mg-5Zn-0.6Zr合金作为研究对象,对该合金进行了搅拌摩擦加工处理,并对搅拌摩擦加工前后合金的组织结构和电化学性能进行了检测分析。结果表明,搅拌摩擦加工处理后的Mg-5Zn-0.6Zr合金形成了较强的(0001)基面织构,且大部分区域位错密度较低,晶粒尺寸从66.4μm细化到1.6μm,沉淀相发生了一定程度的破碎和弥散分布,在3.5%(下文如无特别说明,均指质量分数)NaCl水溶液中开路电位下的腐蚀电流密度由38.3μA/cm^(2)降至17.0μA/cm^(2),极化电阻由48.98Ω·cm^(2)提升至197.02Ω·cm^(2)。研究表明,搅拌摩擦加工可以有效提高镁合金的耐蚀性。

关键词：搅拌摩擦加工镁合金耐蚀性动态再结晶

含环氧乙烷/环氧丙烷功能侧链聚合型大分子表面活性剂的溶液与界面性能的Mesodyn模拟

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石油化工 2023年第11期52卷 1559-1565页

作者：许汇苏智青王兰朱益兴中石化(上海)石油化工研究院有限公司、中国石化三采用表面活性剂重点实验室上海201208

采用Mesodyn模拟,对含有环氧乙烷(EO)、环氧丙烷(PO)功能侧链及不同侧链分布结构的聚合型大分子表面活性剂(聚表剂)溶液性能及其在油水界面上的分布进行了研究。模拟结果表明,当EO链和PO链分别位于聚表剂主链两侧时,聚表剂在油水界面上... 详细信息

采用Mesodyn模拟,对含有环氧乙烷(EO)、环氧丙烷(PO)功能侧链及不同侧链分布结构的聚合型大分子表面活性剂(聚表剂)溶液性能及其在油水界面上的分布进行了研究。模拟结果表明,当EO链和PO链分别位于聚表剂主链两侧时,聚表剂在油水界面上的排布更有序,界面性能更好;当EO链和PO链位于聚表剂主链同侧时,聚表剂在油水界面上排布有序程度较低,界面性能较弱;在功能侧链长度相同的情况下,聚表剂的功能侧链结构对聚表剂的亲油功能侧链形成分子间缔合及其增黏性能影响较小。

关键词：聚合型大分子表面活性剂界面活性功能侧链溶液性能油水界面分布 Mesodyn模拟

基于改进Mask R-CNN的笼养死鸭识别方法

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农业机械学报 2024年第7期55卷 305-314页

作者：柏宗春吕胤春朱一星马肄恒段恩泽江苏省农业科学院农业设施与装备研究所南京210014 农业农村部长江中下游设施农业工程重点实验室南京210014 江苏大学农业工程学院镇江212013

针对规模化笼养肉鸭舍内死鸭识别采用人工作业方式时,存在作业效率低、劳动强度大、养殖成本高等问题,以层叠式笼养肉鸭为研究对象,提出了一种基于深度学习的笼养死鸭识别方法。为了采集数据,首先面向立体层叠式养殖环境设计了一款适用... 详细信息

针对规模化笼养肉鸭舍内死鸭识别采用人工作业方式时,存在作业效率低、劳动强度大、养殖成本高等问题,以层叠式笼养肉鸭为研究对象,提出了一种基于深度学习的笼养死鸭识别方法。为了采集数据,首先面向立体层叠式养殖环境设计了一款适用于肉鸭舍的自主巡检装备。针对笼养肉鸭舍铁丝网遮挡严重的问题,基于机器视觉对笼网进行修复,基于OpenCV对图像进行增强处理。构建了一种基于Mask R-CNN的死鸭识别模型,采用Swin Transformer对模型进行优化,解决了Mask R-CNN网络缺乏整合全局信息能力的问题。对比分析了SOLO v2、Mask R-CNN和Mask R-CNN+Swin Transformer模型识别笼内死鸭准确率。实验结果表明,在平均精度均值为90%的条件下,Mask R-CNN+Swin Transformer模型对笼内死鸭总体识别准确率可达95.8%,在自主巡检装备上的检测效果优于其他主流的目标检测算法。

关键词：机器视觉笼养肉鸭死鸭识别 Mask R-CNN