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Journal of Energy Chemistry 2023年第1期76卷 59-66,I0003页

作者： Yuxiao Wang jian gou Hongzhang Zhang Xiaofei Yang Huamin Zhang Xianfeng Li Dalian Institute of Chemical Physics Chinese Academy of SciencesDalian 116023LiaoningChina University of Chinese Academy of Sciences Beijing 100039China

Silica-based anode is widely employed for high energy density Li-ion batteries owing to their high theoretical specific capacity(4200 m A h g-1).However,it is always accompanied by a huge volume expansion(300%)and shrinks during the lithiation/delithiation process,further leading to low cycle stability.Efforts to mitigate the adverse effects caused by volume expansion such as robust binder matrix,Coreshell structure,etc.,inevitably affect the electronic conductivity within the electrode.Herein,a high conductivity and elasticity Si anode(Ni-P-SBR(styrene-butadiene rubber)@Si)was designed and fabricated via the Ni-P-SBR composite-electroless-plating process.In this design,the Si particles are surrounded by SBR polymer and Ni particles,where the SBR can adapt to the volume change and Ni particles can provide the electrode with high electronic conductivity.Therefore,the Ni-P-SBR@Si delivers a high initial capacity of 3470 m A h g-1and presents capacity retention of 49.4%within 200 cycles at 600 m A g-1.Additionally,a high capacity of 1153 m A h g-1can be achieved at 2000 m A g-1and can be cycled stably under bending conditions.This strategy provides feasible ideas to solve the key issues that limit the practical application of Si anodes.

关键词： Silicon anode Volume expansion Composite-electroless-plating High elasticity High electronic conductivity

Realizing quinary charge states of solitary defects in two-dimensional intermetallic semiconductor

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National Science Review 2022年第2期9卷 63-69页

作者： jian gou Bingyu Xia Xuguang Wang Peng Cheng Andrew Thye Shen Wee Wenhui Duan Yong Xu Kehui Wu Lan Chen Institute of Physics Chinese Academy of Sciences School of Physics University of Chinese Academy of Sciences Department of Physics National University of Singapore State Key Laboratory of Low-Dimensional Quantum Physics Department of Physics Tsinghua University Institute for Advanced Study Tsinghua University Collaborative Innovation Center of Quantum Matter RIKEN Center for Emergent Matter Science (CEMS) Songshan Lake Materials Laboratory

Creating and manipulating multiple charge states of solitary defects in semiconductors is of essential importance for solitary defect electronics,but is fundamentally limited by Coulomb’s law.Achieving this objective is challenging,due to the conflicting requirements of the localization necessary for the sizable band gap and delocalization necessary for a low charging energy.Here,using scanning tunneling microscopy/spectroscopy experiments and first-principles calculations,we realized exotic quinary charge states of solitary defects in two-dimensional intermetallic semiconductor Sn2Bi.We also observed an ultralow defect charging energy that increases sublinearly with charge number rather than displaying the usual quadratic behavior.Our work suggests a promising route for constructing multiple defect-charge states by designing intermetallic semiconductors,and opens new opportunities for developing quantum devices with charge-based quantum states.

关键词： 2D materials intermetallic semiconductor tip-induced band bending solitary defect defect charging

A dual-stimuli-responsive intelligent layered lanthanide hydroxide for application in information security and latent fingerprint identification

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Journal of Rare Earths 2022年第11期40卷 1715-1727,I0002页

作者： Jun Xu Tinghui Zhu jianchao Shi Bo Song Lina Zhang Dan Zhao Xiyan Dong Ning Bi jian gou Lei Jia College of Chemistry and Chemical Engineering Henan Polytechnic UniversityJiaozuo 454000China State Key Laboratory of Fine Chemicals School of ChemistryDalian University of TechnologyDalian 116024China

With the rapid changes in the field of information,the research and development of optical storage materials with high security and large storage capacity are particularly important in the development of contemporary society.However,conventional memo ry materials with static fluorescent outputs have the disadvantages of easy simulation and forgery,which limits their practical application in the protection of confidential information.In this research,a dual-stimuli-responsive intelligent fluorescent material based on Tb^(3+)and Eu^(3+)ions doped layered lanthanide hydroxide(LYH:Eu_(x)Tb_(1-x)DPA)was fabricated,which can realize reversible multi-color luminescence conversion(from green to red)by varying the pH and temperature.Combined with the Morse code and security pattern,the multiple encryption and decryption of confidential information and anti-counterfeiting can also be realized.Therefore,the obtained intelligent fluorescent material has a great application prospect for information security.In addition,due to the excellent color tunability,the material can provide the possibility to obtain potential fingerprints with high contrast and no background interference on different color substrates.The unique dual-stimuli-responsive behavior of this material provides more ingenious design inspiration for the design of multi-color intelligent fluorescent devices.

关键词： Layered lanthanide hydroxides Dual-stimuli-responsive Encryption Decryption Latent fingerprint Rare earths

Effects of Nb on microstructure and wear resistance of Fe-Cr-C-B surfacing alloy

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Journal of Iron and Steel Research(International) 2018年第2期25卷 243-251页

作者： jian gou Zheng-jun Liu Hua Jia Department of Material Science and Engineering ShenyangUniversity of Technology Shenyang 110870 LiaoningChina

The influence of Nb on the microstructure and wear resistance of the surfacing layer was investigated by using the Fe-based flux-cored wire in the Fe-Cr-C-B system. The microstructure, microhardness and wear resistance properties of the samples were investigated by X-ray diffraction, scanning electron microscopy, microhardness testing and abrasive wear testing, respectively. The results indicate that microstructures of the alloy are composed of martensite, retained austenite, M23（C,B）6 and NbC. Boride M23（C,B）6 is distributed along the grain boundaries, while NbC in shape-regular quadrilateral is distributed in martensite. The microhardness is distributed from the substrate to the surfacing layer gradiently. NbC significantly improved the wear resistance of surfacing layer.

关键词： Flux-cored wire Surfacing layer Microhardness Microstructure Wear resistance

Effects of cold metal transfer mode on the reaction layer of wire and arc additive-manufactured Ti-6Al-4V/Al-6.25Cu dissimilar alloys

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Journal of Materials Science & Technology 2021年第15期74卷 35-45页

作者： Yinbao Tian Junqi Shen Shengsun Hu jian gou Yan Cui Tianjin Key Laboratory of Advanced Joining Technology Tianjin UniversityTianjin 300354China School of Materials Science and Engineering Tianjin UniversityTianjin 300354China Department of Mechanical Engineering University of MichiganAnn ArborMI 48109USA

Components of Ti and Al dissimilar alloys were obtained by wire and arc additive manufacturing using two cold metal transfer(CMT)modes.Direct current CMT(DC-CMT)mode was used for Ti alloy deposition,and DC-CMT or CMT plus pulse(CMT+P)mode was used for the Al alloy deposition.During deposition of the first Al alloy layer,little and a significant amount of Ti alloy were melted using DC-CMT and CMT+P mode,respectively.TiAl_(3)formed in the reaction layer when DC-CMT mode was used,while TiAl_(3),TiAl,and Ti3Al formed in the reaction layer when CMT+P mode was used.Compared to using DC-CMT mode,more cracks occurred when using CMT+P.The nanohardness of the reaction layer was between that of the Al and Ti alloys,irrespective of the CMT modes.The average tensile strengths of the samples using DC-CMT and CMT+P mode were 108 MPa and 24 MPa,respectively.DC-CMT mode was more suitable for the wire and arc additive manufacturing of Ti/Al dissimilar alloys.

关键词： Ti/Al dissimilar alloys Wire and arc additive manufacturing Reaction layer Microstructure Mechanical properties

Oxygen-induced controllable p-type doping in 2D semiconductor transition metal dichalcogenides

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Nano Research 2020年第12期13卷 3439-3444页

作者： Qijie Liang jian gou Arramel Qian Zhang Wenjing Zhang Andrew Thye Shen Wee SZU-NUS Collaborative Innovation Center for Optoelectronic Science&Technology International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of EducationCollege of Optoelectronic EngineeringShenzhen UniversityShenzhen518060China Department of Physics National University of Singapore2 Science Drive 3Singapore117551Singapore Department of Materials Science and Engineering National University of SingaporeSingapore117574Singapore Centre for Advanced 2D Materials National University of SingaporeBlock S146 Science Drive 2Singapore117546Singapore

Exposure to oxygen alters the physical and chemical properties of two-dimensional(2D)transition metal dichalcogenides(TMDs).In particular,oxygen in the ambient may influence the device stability of 2D TMDs over time.Engineering the doping of 2D TMDs,especially hole doping is highly desirable towards their device function.Herein,controllable oxygen-induced p-type doping in a range of hexagonal(MoTe2,WSe2,MoSe2 and PtSe2)and pentagonal(PdSe2)2D TMDs are demonstrated.Scanning tunneling microscopy,electrical transport and X-ray photoelectron spectroscopy are used to probe the origin of oxygen-derived hole doping.Three mechanisms are postulated that contribute to the hole doping in 2D TMDs,namely charge transfer from absorbed oxygen molecules,surface oxides,and chalcogen atom substitution.This work provides insights into the doping effects of oxygen,enabling the engineering of 2D TMDs properties for nanoelectronic applications.

关键词： two-dimensional transition metal dichalcogenides oxygen induced doping oxygen substitution charge transfer

Experimental realization of honeycomb borophene

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Science Bulletin 2018年第5期63卷 282-286页

作者： Wenbin Li Longjuan Kong Caiyun Chen jian gou Shaoxiang Sheng Weifeng Zhang Hui Li Lan Chen Peng Cheng Kehui Wu Institute of Physics Chinese Academy of Sciences Beijing 100190 China School of Physical Sciences University of Chinese Academy of Sciences Beijing 100049 China School of Physics and Electronics Henan University Kaifeng 475004 China Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical Technology Beijing 100029 China Collaborative Innovation Center of Quantum Matter Beijing 100871 China

We report the successful preparation of a purely honeycomb,graphene-like borophene,by using an Al(11 1) surface as the substrate and molecular beam epitaxy(MBE) growth in ultrahigh vacuum.Scanning tunneling microscopy(STM) images reveal perfect monolayer borophene with planar,non-buckled honeycomb lattice similar as graphene.Theoretical calculations show that the honeycomb borophene on Al(1 1 1) is energetically stable.Remarkably,nearly one electron charge is transferred to each boron atom from the Al(1 1 1) substrate and stabilizes the honeycomb borophene structure,in contrast to the negligible charge transfer in case of borophene/Ag(1 1 1).The existence of honeycomb 2 D allotrope is important to the basic understanding of boron chemistry,and it also provides an ideal platform for fabricating boron-based materials with intriguing electronic properties such as Dirac states.

关键词： Borophene Honeycomb structure2 D materials

借力学术研究推进行政管理本科专业建设的教改实践探索

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张家口职业技术学院学报 2024年第2期37卷 26-29页

作者：姚贱苟邓惠月广西师范大学政治与公共管理学院广西桂林541006

学术研究和教学既相互区别,又相互联系,二者在高校的教育过程中缺一不可。通过梳理国内外学术研究推进行政管理本科专业培养人才的现状,分析新形势下国内学术研究推进行政管理本科专业建设存在的问题并提出针对性的优化措施,有助于深化... 详细信息

学术研究和教学既相互区别,又相互联系,二者在高校的教育过程中缺一不可。通过梳理国内外学术研究推进行政管理本科专业培养人才的现状,分析新形势下国内学术研究推进行政管理本科专业建设存在的问题并提出针对性的优化措施,有助于深化科研反哺教学,把我国学术研究推进行政管理本科专业建设教学改革的具体实践引向深入。

关键词：行政管理专业教学改革科研反哺

基于UHPLC Q-Exactive Plus Orbitrap HRMS高分辨质谱技术的隔山消提取物化学成分分析

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中国新药杂志 2024年第5期33卷 489-498页

作者：勾健吴宗芹孟欣韦晓毅刘春花朱迪秦兰孙佳贵州医科大学贵州省药物制剂重点实验室/省部共建药用植物功效与利用国家重点实验室贵阳550001 贵州医科大学民族药与中药开发应用教育部工程研究中心贵阳550001 贵州医科大学药学院贵阳550001 红云制药(贵州)有限公司凯里556000 贵州中医药大学第一附属医院贵阳550001

目的:采用UHPLC Q-Exactive Plus Orbitrap高分辨质谱(HRMS)技术建立全面、快速分析隔山消化学成分的方法,为隔山消的药效物质研究提供科学依据。方法:采用Hypersi 1 GOLD色谱柱(100 mm×2.1 mm,1.9μm),以0.1%甲酸水溶液(A)-0.1%甲酸... 详细信息

目的:采用UHPLC Q-Exactive Plus Orbitrap高分辨质谱(HRMS)技术建立全面、快速分析隔山消化学成分的方法,为隔山消的药效物质研究提供科学依据。方法:采用Hypersi 1 GOLD色谱柱(100 mm×2.1 mm,1.9μm),以0.1%甲酸水溶液(A)-0.1%甲酸乙腈溶液(B)为流动相进行梯度洗脱,流速0.3 mL·min^(-1),柱温40℃。在电喷雾离子源正、负离子模式下采集数据,扫描范围m/z 100~1500 Da;喷雾电压3.5 kV(+),2.5 kV(-);鞘气流速35 arb;辅助气流速10 arb;毛细管温度320℃;辅助加热器温度350℃。依据HRMS提供的准分子离子峰及碎片离子的精确分子质量信息,结合对照品比对,相关文献报道及m/z Cloud和PUBchem数据库比对二级质谱进行鉴定。结果:从隔山消提取物中共分析出66个化合物,包括C21甾体类34个,有机酸类13个,苯乙酮类5个,香豆素类4个,生物碱类4个和其他类6个化合物,其中18个化合物为首次在隔山消中报道。结论:该方法可对隔山消化学成分进行快速、准确、全面的定性分析,为今后进一步阐明其药效物质基础和质量控制提供科学依据。

关键词： UHPLC Q-Exactive Plus Orbitrap HRMS 隔山消化学成分裂解规律

Risk factors of concurrent urinary sepsis in patients with diabetes mellitus comorbid with upper urinary tract calculi

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世界糖尿病杂志:英文版(电子版) 2023年第9期14卷 1403-1411页

作者： jian-Jie gou Chao Zhang Hai-Song Han Hong-Wei Wu Department of Urology Surgery People’s Hospital of JinchengJincheng 048000Shanxi ProvinceChina Emergency Department People’s Hospital of JinchengJincheng 048000Shanxi ProvinceChina

BACKGROUND Urinary sepsis is frequently seen in patients with diabetes mellitus(DM)complicated with upper urinary tract calculi(UUTCs).Currently,the known risk factors of urinary sepsis are not uniform.AIM To analyze the risk factors of concurrent urinary sepsis in patients with DM complicated with UUTCs by logistic regression.METHODS We retrospectively analyzed 384 patients with DM complicated with UUTCs treated in People’s Hospital of Jincheng between February 2018 and May 2022.The patients were screened according to the inclusion and exclusion criteria,and 204 patients were enrolled.The patients were assigned to an occurrence group(n=78)and a nonoccurrence group(n=126).Logistic regression was adopted to analyze the risk factors for urinary sepsis,and a risk prediction model was established.RESULTS Gender,age,history of lumbago and abdominal pain,operation time,urine leukocytes(U-LEU)and urine glucose(U-GLU)were independent risk factors for patients with concurrent urinary sepsis(P<0.05).Risk score=0.794×gender+0.941×age+0.901×history of lumbago and abdominal pain-1.071×operation time+1.972×U-LEU+1.541×U-GLU.The occurrence group had notably higher risk scores than the nonoccurrence group(P<0.0001).The area under the curve of risk score for forecasting concurrent urinary sepsis in patients was 0.801,with specificity of 73.07%,sensitivity of 79.36%and Youden index of 52.44%.CONCLUSION Sex,age,history of lumbar and abdominal pain,operation time,ULEU and UGLU are independent risk factors for urogenic sepsis in diabetic patients with UUTC.

关键词： Diabetes mellitus Upper urinary tract calculi Urinary sepsis Risk factors Risk prediction model Logistic regression Concurrent urinary sepsis