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Nano Research 2023年第1期16卷 1527-1532页

作者： Aimin Yao Yuanxin DU Meng Han Yan Wang Jiashen Hu Qingtao Zhu Hongting Sheng Manzhou Zhu Department of Materials Science and Engineering Centre for Atomic Engineering of Advanced MaterialsKey Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of EducationKey Laboratory of Functional Inorganic Material Chemistry of Anhui ProvinceAnhui UniversityHefei 230601China

Metal nanoclusters(NCs)with precise structure and ultrasmall size have attracted great interests in catalysis.However,the poor stability has limited its large-scale use.Herein,we proposed the“covalence bridge”strategy to effectively connect atomically precise metal NCs and metal-organic frameworks.Benefiting from the covalent linkage,the synthesized UiO-66-NH2-Au25(LCys)18 showed outstanding stability after 16 h photocatalysis.Moreover,the covalence bridge created a strong metal-support interaction between the two components and provided an effective charge transport channel and thereby enhanced photocatalytic activity.UiO-66-NH2-Au25(L-Cys)18 displayed an exceptional photocatalytic H2 production rate,which is 21 and 90 times higher than that of UiO-66-NH2/Au25(PET)18(made by physically combination)and bare UiO-66-NH2,respectively.Thermodynamic and kinetic studies demonstrated that UiO-66-NH2-Au25(L-Cys)18 exhibited higher charge transfer efficiency,lower overpotential of water reduction and activation energy barrier compared with its counterparts.

关键词： atomically precise nanoclusters metal-organic frameworks covalent binding photostability photocatalytic hydrogen production

Rationally construction of atomic-precise interfacial charge transfer channel and strong build-in electric field in nanocluster-based Zscheme heterojunctions with enhanced photocatalytic hydrogen production

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Nano Research 2024年第6期17卷 5002-5010页

作者： Qingtao Zhu Honglei Shen Chao Han Liu Huang Yanting Zhou Yuanxin DU Xi Kang Manzhou Zhu Department of Materials Science and Engineering Centre for Atomic Engineering of Advanced MaterialsKey Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of EducationKey Laboratory of Functional Inorganic Material Chemistry of Anhui ProvinceAnhui UniversityHefei 230601China

The lack of effective charge transfer driving force and channel limits the electron directional migration in nanoclusters(NC)-based heterostructures,resulting in poor photocatalytic performance.Herein,a Z-scheme NC-based heterojunction(Pt1Ag28-BTT/CoP,BTT=1,3,5-benzenetrithiol)with strong internal electric field is constructed via interfacial Co-S bond,which exhibits an absolutely superiority in photocatalytic performance with 24.89 mmol·h^(−1)·g−1 H_(2)production rate,25.77%apparent quantum yield at 420 nm,and~100%activity retention in stability,compared with Pt1Ag28-BDT/CoP(BDT=1,3-benzenedithiol),Ag29-BDT/CoP,and CoP.The enhanced catalytic performance is contributed by the dual modulation strategy of inner core and outer shell of NC,wherein,the center Pt single atom doping regulates the band structure of NC to match well with CoP,builds internal electric field,and then drives photogenerated electrons steering;the accurate surface S modification promotes the formation of Co-S atomic-precise interface channel for further high-efficient Z-scheme charge directional migration.This work opens a new avenue for designing NC-based heterojunction with matchable band structure and valid interfacial charge transfer.

关键词： atomically precise metal nanocluster Z-scheme heterojunction interfacial charge transfer build-in electric field photocatalytic hydrogen production

Screening criteria of mRNA indicators for wound age estimation

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Forensic Sciences Research 2022年第4期7卷 714-725页

作者： Qiuxiang du Tana Dong yuanxin Liu Xiyan Zhu Na Li Lihong Dang Jie Cao Qianqian Jin Junhong Sun School of Forensic Medicine Shanxi Medical UniversityJinzhongChina Shandong Public Security Department The Institute of Criminal Science and TechnologyJinanChina Department of Military Traffic Medicine Army Characteristic Medical CenterChongqingChina

Wound age estimation is a crucial and challenging problem in forensic pathology.Although mRNA is the most commonly used indicator for wound age estimation,screening criteria are lacking.In the present study,the feasibility of screening criteria using mRNA to determine injury time based on the adenylate-uridylate-rich element(ARE)structure and gene ontology(GO)categories were evaluated.A total of 78 Sprague-Dawley male rats were contused and sampled at 4,8,12,16,20,24,28,32,36,40,44,and 48 h after inflicting injury.The candidate mRNAs were classified based on with or without ARE structure and GO category function.The mRNA expression levels were detected using qRT-PCR.In addition,the standard deviation(STD),mean deviation(MD),relative average deviation(d%),and coefficient of variation(CV)were calculated based on mRNA expression levels.The CV score(CVs)and the CV of CV(CV’CV)were calculated to measure heterogeneity.Finally,based on classic principles,the accuracy of combination of candidate mRNAs was assessed using discriminant analysis to construct a multivariate model for inferring wound age.The results of homogeneity evaluation of each group based on CVs were consistent with the MD,STD,d%,and CV results,indicating the credibility of the evaluation results based on CVs.The candidate mRNAs without ARE structure and classified as cellular component(CC)GO category(ARE-CC)had the highest CVs,showing the mRNAs with these characteristics are the most homogenous mRNAs and best suited for wound age estimation.The highest accuracy was 91.0%when the mRNAs without ARE structure were used to infer the wound age based on the discrimination model.The accuracy of mRNAs classified into CC or multiple function(MF)GO category was higher than mRNAs in the biological process(BP)category.In all subgroups,the accuracy of the composite identification model of mRNA composition without ARE structure and classified as CC was higher than other subgroups.The mRNAs without ARE structure and belonging to the CC GO category were more homogenous

关键词： Forensic sciences forensic pathology wound age estimation mRNA indicator ARE structure GO categories

Selectable infiltrating large hollow core photonic band-gap fiber

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Chinese Science Bulletin 2013年第21期58卷 2606-2610页

作者： LIU JianGuo du yuanxin ZHU NingHua LIU FengMei State Key Laboratory of Integrated Optoelectronics Institute of Semiconductors Chinese Academy of Sciences Haidian Maternal & Child Health Hospital

A selectable infiltrating large hollow core photonic band-gap fiber is fabricated with simple arc discharge technique. The offset, discharge duration, arc current and discharge times are optimized for selected sealing side air-holes but leave the central large air-hole partially open. The collapse length of the PCF is shortened by increasing the number of discharges and offset with discharge duration and arc current kept at a relatively low level. Light with the wavelength located at the photonic band-gap can still propagate while the central hollow air-hole is infiltrated with a kind of oil with refractive index of 1.30. The selectable infiltrating large hollow core photonic band-gap fiber has potential application for implementing novel lasers, sensors and tunable optoelectronic devices.

关键词：光子带隙光纤空芯渗透放电技术电弧电流光子晶体光纤放电时间光子学器件

面向双一流建设的材料类专业英语的教学改革与实践

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长春大学学报 2023年第10期33卷 83-86页

作者：杜袁鑫安徽大学材料科学与工程学院合肥230601

随着国际交流日益频繁,我国的国际地位逐渐提高,我国对具有专业知识的国际化一流人才的需求也越来越多。尤其在材料学科领域,如何培养高水平的国际化专业人才一直是教育学者们关心的问题。文章从材料类专业英语的教学现状出发,总结了材... 详细信息

随着国际交流日益频繁,我国的国际地位逐渐提高,我国对具有专业知识的国际化一流人才的需求也越来越多。尤其在材料学科领域,如何培养高水平的国际化专业人才一直是教育学者们关心的问题。文章从材料类专业英语的教学现状出发,总结了材料类专业英语教学过程中存在的普遍问题,并结合笔者自身的教学经历,针对性地提出了相应的改革措施,以期在今后的教学中提升教学效果。

关键词：一流人才培养材料类专业英语教学改革

Source apportionment of ambient PM_(10) in urban areas of Wuxi,China

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Frontiers of Environmental Science & Engineering 2011年第4期5卷 552-563页

作者： Bo HAN Xiaohui BI Yonghua XUE Jianhui WU Tan ZHU Baogui ZHANG Jianqing DING Yuanxin DU College of Environmental Science and Engineering Nankai UniversityTianjin 300071China Wuxi Environmental Monitoring Center Jiangsu 214023China

A total of 168 PM_(10)samples were collected during the year of 2005 at eight sites in the city of Wuxi in China.Fifteen chemical elements,three water-soluble ions,total carbon and organic carbon were analyzed.Six source categories were identified and their contributions to ambient PM_(10)in Wuxi were estimated using a nested chemical mass balance method that reduces the effects of colinearity on the chemical mass balance model.In addition,the concentrations of secondary aerosols,such as secondary organic carbon,sulfate and nitrate,were quantified.The spatially averaged PM_(10)was high in the spring and winter(123μg·m^(-3)and low in the summer-fall(90μg·m^(-3)).According to the result of source apportionment,resuspended dust was the largest contributor to ambient PM_(10),accounting for more than 50%of the PM_(10)mass.Coal combustion(14.6%)and vehicle exhaust(9.4%)were also significant source categories of ambient PM_(10).Construction and cement dust,sulfates,secondary organic carbon,and nitrates made contributions ranging between 4.1%and 4.9%.Other source categories such as steel manufacturing dust and soil dust made low contributions to ambient PM_(10).

关键词： source apportionment inhalable particulate matter nested chemical mass balance method

Fast tunable and broadband microwave sweep-frequency source based on photonic technology

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Science China Technological Sciences 2013年第3期56卷 612-616页

作者： ZHU NingHua du yuanxin WU XuMing ZHENG JianYu WANG Hui LIU JianGuo State Key Laboratory on Integrated Optoelectronics Institute of SemiconductorsChinese Academy of Sciences

A high-speed broadband tunable microwave source utilizing the wavelength tunable characteristics of distributed Bragg reflector(DBR) laser is proposed and demonstrated.The wavelength tuning of the laser is achieved instantaneously by controlling the voltage of the phase section of the DBR laser.By means of optical delay self-heterodyne technology,the microwave signal with the property of frequency broadband tuning is generated.Sweep speeds of 5 and 40 μs of the sweep-frequency source prototype were achieved and the maximum tuning range was up to 38.45 GHz.

关键词： microwave source frequency sweep broadband high speed

Design of bifunctional single-atom catalysts NiSA/ZIF-300 for CO_(2) conversion by ligand regulation strategy

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Nano Research 2024年第5期17卷 3827-3834页

作者： Wengang Fu Yapei Yun Hongting Sheng Xiaokang Liu Tao Ding Shuxian Hu Tao Yao Binghui Ge Yuanxin DU Didier Astruc Manzhou Zhu Department of Chemistry and Centre for Atomic Engineering of Advanced Materials Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of EducationCollege of Materials Science and EngineeringInstitutes of Physical Science and Information Technology and Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized MaterialsAnhui UniversityHefei 230601China Universitéde Bordeaux ISMUMR CNRS N°5255351 Cours de La Libération33405 Talence CedexFrance National Synchrotron Radiation Laboratory University of Science and Technology of ChinaHefei 230026China Department of Physics University of Science and Technology BeijingBeijing 100083China Anhui Tongyuan Environment Energy Saving Co. LtdHefei 230041China

Carbon-supported noble-metal-free single-atom catalysts(SACs)have aroused widespread interest due to their green chemistry aspects and excellent performances.Herein,we propose a“ligand regulation strategy”and achieve the successful fabrication of bifunctional SAC/MOF(MOF=metal-organic framework)nanocomposite(abbreviated NiSA/ZIF-300;ZIF=ZIF-8)with exceptional catalytic performance and robustness.The designed NiSA/ZIF-300 has a planar interfacial structure with the Ni atom,involving one S and three N atoms bonded to Ni(Ⅱ),fabricated by controllable pyrolysis of volatile Ni-S fragments.For CO_(2) cycloaddition to styrene epoxide,NiSA/ZIF-300 exhibits ultrahigh activity(turnover number(TON)=1.18×105;turnover frequency(TOF)=9830 molSC·mol_(Ni)^(-1)·h^(-1);SC=styrene carbonate)and durability at 70℃ under 1 atm CO_(2) pressure,which is much superior to Ni complex/ZIF,NiNP/ZIF-300,and most reported catalysts.This study offers a simple method of bifunctional SAC/MOF nanocomposite fabrication and usage,and provides guidance for the precise design of additional original SACs with unique catalytic properties.

关键词： single atom catalyst bifunctional CO_(2)conversion cycloaddition

双一流建设下固体物理与思政教育的协同育人实践探索

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北京城市学院学报 2021年第5期 90-92页

作者：杜袁鑫安徽大学材料科学与工程学院安徽合肥230601

在双一流高校建设的大背景下,培养全面的高水平一流人才是全体教育者们的共同的目标。目前,理工类学科与思政教育的结合相对薄弱,无法利用协同促进作用,实现全方位育人。以固体物理专业课程为例,阐述了固体物理专业结合思政教育的优势... 详细信息

在双一流高校建设的大背景下,培养全面的高水平一流人才是全体教育者们的共同的目标。目前,理工类学科与思政教育的结合相对薄弱,无法利用协同促进作用,实现全方位育人。以固体物理专业课程为例,阐述了固体物理专业结合思政教育的优势及必要性,探讨了当前固体物理专业教学中思政教育的落实情况及存在的问题,并结合教学实践提出固体物理协同思政教育的实施方案。

关键词：双一流建设固体物理思政教育协同育人

基于SWOT-QSPM模型的西藏应急交通运输体系发展战略

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国防科技 2022年第1期43卷 71-79页

作者：胡远新杜小敏陆军勤务学院重庆401331

由于应急交通运输在突发事件应急处置中发挥着基础性支撑作用,因此,军队和地方政府需要全面推进应急交通运输体系发展。本文首先运用SWOT分析法剖析了西藏应急交通运输体系的优势、劣势、机遇、威胁,构建了内部因素综合评价矩阵、外部... 详细信息

由于应急交通运输在突发事件应急处置中发挥着基础性支撑作用,因此,军队和地方政府需要全面推进应急交通运输体系发展。本文首先运用SWOT分析法剖析了西藏应急交通运输体系的优势、劣势、机遇、威胁,构建了内部因素综合评价矩阵、外部因素综合评价矩阵和SWOT战略四边形,得出当前最适宜的发展战略是S-O进取型战略的结论;然后运用QSPM模型确定S-O战略中5项战略措施的优先顺序,依次为建立军地一体化联合指挥机构、建立基于区块链技术的应急信息平台、建立市场化的应急交通运输服务采购机制、完善应急预案体系和建立西藏战略投送支援机队;最后据此提出了西藏应急交通运输体系发展战略的实施措施,以期为西藏应急交通运输体系的战略计划制定提供参考。

关键词：西藏 SWOT QSPM 应急交通运输