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Biomass-assisted approach for large-scale construction ofmulti-functional isolated single-atom site catalysts

Nano Research 2022年第5期15卷 3980-3990页

作者： Tao Wu Sha li Shoujie liu Weng-Chon Cheong Cheng Peng Kai Yao Yingping li Jieyue Wang Binbin Jiang zheng Chen Zhiming Chen Xianwen Wei Konglin Wu Key Laboratory of Metallurgical Emission Reduction&Resources Recycling Ministry of EducationInstitute of Clean Energy and Advanced Nanocatalysis(iClean)School of Chemistry and Chemical EngineeringAnhui University of TechnologyMaanshan 243002China Anhui Laboratory of Clean Catalytic Engineering School of Chemical and Environmental EngineeringAnhui Polytechnic UniversityWuhu 241000China Center of Single-Atom Clustersand Nanomaterials(CAN)College of Chemistry and Materials ScienceAnhui Normal UniversityWuhu 241002China Chemistry and Chemical Engineering of Guangdong Laboratory Shantou 515063China department of physics and Chemistry Faculty of Science and TechnologyUniversity of MacaoMacaoChina School of Chemistry and Chemical Engineering Anhui Key Laboratory of Photoelectric-Magnetic Functional MaterialsAnqing Normal UniversityAnqing 246011China

In recent years,the isolated single-atom site(ISAS)catalysts have attracted much attention as they are cost-effective,can achieve 100%atom-utilization efficiency,and often display superior catalytic ***,we developed a biomass-assisted pyrolysis-etching-activation(PEA)strategy to construct ISAS metal decorated on N and B co-doped porous carbon(ISAS M/NBPC,M=Co,Fe,or Ni)*** PEA strategy can be applied in the universal and large-scale preparation of ISAS ***,the ISAS M/NBPC(M=Co,Fe,or Ni)catalysts show multi-functional features and excellent catalytic *** can be used to conduct different types of catalytic reactions,such as O-silylation(OSI),oxidative dehydrogenation(ODH),and transfer hydrogenation(THG).In addition,we used the transfer hydrogenation of nitrobenzene as a typical reaction and revealed the difference between ISAS Co/NBPC and ISAS Co/NPC(N-doped porous carbon)catalysts by density functional theory(DFT)calculations,and which showed that the decreased barrier of the ratedetermining step and the low-lying potential energy diagram indicate that the catalytic activity is higher when ISAS Co/NBPC is used than that when ISAS Co/NPC is *** results demonstrate that the catalytic performance can be effectively improved by adjusting the coordination environment around the ISAS.

关键词： single-atom site multifunctional catalyst heteroatomic coordination oxydehydrogenation hydrogenation

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Detection of DC electric forces with zeptonewton sensitivity by single-ion phonon laser

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Science China(physics,Mechanics & Astronomy) 2022年第11期65卷 107-114页

作者： Ya-Qi Wei Ying-zheng Wang Zhi-Chao liu Tai-Hao Cui {2.ang Chen Ji {2. Shuang-Qin Dai Fei Zhou Mang Feng State Key Laboratory of Magnetic Resonance and Atomic and Molecular physics Wuhan Institute of Physics and MathematicsInnovation Academy of Precision Measurement Science and TechnologyChinese Academy of SciencesWuhan430071China university of the Chinese Academy of Sciences Beijing100049China Laboratory of Quantum Science and Engineering South China University of TechnologyGuangzhou510641China Research Center for Quantum Precision Measurement Guangzhou Institute of Industry TechnologyGuangzhou511458China School of physics Zhengzhou UniversityZhengzhou450001China department of physics Zhejiang Normal UniversityJinhua321004China

Detecting extremely small forces helps exploring new physics *** we demonstrate that the phonon laser made of a single trapped ^(40)Ca^(+) ion behaves as an exquisite sensor for small force *** report our successful detection of small electric forces regarding the DC trapping potential with sensitivity of(2.41±0.49)zN/√Hz,with the ion only under Doppler cooling,based on the injection-locking of the oscillation phase of the phonon laser in addition to the classical squeezing {2. to suppress the measurement *** anticipate that such a single-ion sensor would reach a much better force detection sensitivity in the future once the trapping system is further improved and the fluorescence collection efficiency is further enhanced.

关键词： single-ion sensor phonon laser super-sensitive detection injection locking classical squeezing

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Emerging catalytic materials for practical lithium-sulfur batteries

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Journal of Energy Chemistry 2023年第1期76卷 127-145,I0004页

作者： Fangyi Shi lingling Zhai Qingqing {2. Jingya Yu Shu Ping Lau Bao Yu Xia zheng-Long Xu department of Industrial and Systems Engineering Department of Applied PhysicsResearch Institute of Advanced Manufacturingthe Hong Kong Polytechnic UniversityHung HomHong Kong SARChina Key Laboratory of Material Chemistry for Energy Conversion and Storage(Ministry of Education) Hubei Key Laboratory of Material Chemistry and Service FailureSchool of Chemistry and Chemical EngineeringHuazhong University of Science and Technology(HUST)Wuhan 430074HubeiChina State Key Laboratory of Ultraprecision Machining Technology the Hong Kong Polytechnic UniversityHung HomHong Kong SARChina Hong Kong Polytechnic university Shenzhen Research Institute Shenzhen 518057GuangdongChina

High-energy lithium-sulfur batteries(LSBs)have experienced relentless development over the past decade with discernible improvements in electrochemical ***,a scrutinization of the cell operation conditions reveals a huge gap between the demands for practical batteries and those in the *** sulfur loading,a high electrolyte/sulfur(E/S)ratio and excess anodes for lab-scale LSBs significantly offset their high-energy *** approach practical LSBs,high loading and lean electrolyte parameters are needed,which involve budding challenges of slow charge transfer,polysulfide precipitation and severe shuttle *** track these obstacles,the exploration of electrocatalysts to immobilize polysulfides and accelerate li-S redox kinetics has been widely ***,this review aims to survey state-of-the-art catalytic materials for practical LSBs with emphasis on elucidating the correlation among catalyst design strategies,material structures and electrochemical *** also statistically evaluate the state-of-the-art catalyst-modified LSBs to identify the remaining discrepancy between the current advancements and the real-world *** closing,we put forward our proposal for a catalytic material study to help realize practical LSBs.

关键词： lithium-sulfur battery Catalytic materials High sulfur loading Lean electrolyte

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Observation and mitigation of image distortion in high-energy electron radiography

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Nuclear Science and Techniques 2023年第6期34卷 69-77页

作者： Hao-Qing li liang Sheng Chang-Qing Zhang Ying-Chao Du {2. Zhou Xiu-Feng Weng Jia-Hao Xiao Hong-Qiao Yin Bin Sun Kun Wei Yang li Bao-Jun Duan Yong-Tang liu Yan-Hong Zhang Mei Zhang Yan Song Xiao-dong Zhang Jun liu Zhu-Ming Fu Qing Xu Xue Du Jian-Peng Gao Xin-Yi Wang Xin-Jian Tan dong-Wei Hei department of Engineering physics Tsinghua UniversityBeijing100084China State Key Laboratory of Intense Pulsed Radiation Simulation and Effect Northwest Institute of Nuclear TechnologyXi’an710024China Institute of applied Electronics China Academy of Engineering PhysicsMianyang621900China Institute of Intelligent Machines Hefei Institutes of Physical ScienceChinese Academy of SciencesHefei230031China Zhongke Hefei Institutes of Collaborative Research and Innovation for Intelligent Agriculture Hefei231131China

Image distortion caused by the angular misalignment of quadrupole magnets in high-energy electron radiography has been studied *** propose that the distortion originates from the coupling of the electron motions in the transverse directions,based on a theoretical analysis and the transfer-matrix *** relative angular rotation between the second and third magnetic quadrupoles was identified as the main contributor to image *** was verified by both a beam-dynamics simulation and *** strategies to mitigate this image distortion are also explored,including magnets online tuning,higher beam energy and larger magnification *** study provides criteria for designing experiments and paves the way for achieving higher image precision.

关键词： Misalignment Angular rotation Russian quadruplet Transfer matrix

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Fixing the reference frame for PPMXL proper motions using extragalactic sources

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Research in Astronomy and Astrophysics 2015年第6期15卷 849-859页

作者： Kathleen Grabowski Jeffrey L. Carlin Heidi Jo Newberg Timothy C. Beers li Chen li-Cai Deng Carl J. Grillmair Puragra Guhathakurta Jin-liang Hou Yong-Hui Hou Se'bastien Le'pine Chao liu Xiao-Wei liu A-li Luo Martin C. Smith Brian Yanny Hao-Tong Zhang Yong Zhang zheng zheng department of physics Applied Physics and Astronomy Rensselaer Polytechnic Institute 110 8th Street Troy NY 12180 USA department of physics and JINA: Joint Institute for Nuclear Astrophysics University of Notre Dame 225 Nieuwland Science Hall Notre Dame IN 46556 USA Shanghai Astronomical Observatory Key Lab of Optical Astronomy National Astronomical Observatories Chinese Academy of Sciences Spitzer Science Center 1200 E. California Blvd. Pasadena CA 91125 USA UCO/lick Observatory Department of Astronomy and Astrophysics University of CaliforniaSanta Cruz CA 95064 USA Nanjing Institute of Astronomical Optics & Technology National Astronomical ObservatoriesChinese Academy of Sciences department of physics and Astronomy Georgia State University 25 Park Place Suite 605Atlanta GA 30303 USA Kavli Institute for Astronomy and Astrophysics Peking University department of Astronomy Peking University Fermi National Accelerator Laboratory P.O. Box 500 Batavia IL 60510 USA department of physics and Astronomy University of Utah

We quantify and correct systematic errors in PPMXL proper motions using extragalactic sources from the first two LAMOST data releases and the Vbron-Cetty ＆ Vebron Catalog of Quasars. Although the majority of the sources are from the Veron catalog, LAMOST makes important contributions in regions that are not well-sampled by previous catalogs, particularly at low Galactic latitudes and in the south Galactic cap. We show that quasars in PPMXL have measurable and significant proper motions, which reflect the systematic zero-point offsets present in the catalog. We confirm the global proper motion shifts seen by Wu et al., and additionally find smaller-scale fluctuations of the QSO-derived corrections to an absolute frame. We average the proper motions of 158 106 extragalactic objects in bins of 3° ×3° and present a table of proper motion corrections.

关键词： catalogs -- proper motions -- surveys LAMOST

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Bio-inspired synthesis of transition-metal oxide hybrid ultrathin nanosheets for enhancing the cycling stability in lithium-ion batteries

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Nano Research 2022年第6期15卷 5064-5071页

作者： Yan-Ru Wang Qing-Feng Zhuang Yi li Ya-lin Hu Yang-Yi {2. Qiao-Bao Zhang Lei Shi Chuan-Xin He Xiao zheng Shu-Hong Yu department of Chemistry Institute of Biomimetic Materials&ChemistryAnhui Engineering Laboratory of Biomimetic MaterialsDivision of Nanomaterials&ChemistryHefei National Laboratory for Physical Sciences at the MicroscaleInstitute of EnergyHefei Comprehensive National Science CenterUniversity of Science and Technology of ChinaHefei 230026China Division of Theoretical and Computational Sciences Hefei National Laboratory for Physical Sciences at the MicroscaleDepartment of Chemical PhysicsUniversity of Science and Technology of ChinaHefei 230026China College of Chemistry and Environmental Engineering Shenzhen UniversityShenzhenGuangdong 518060China department of Materials Science and Engineering College of MaterialsXiamen UniversityXiamenFujian 361005China

Constructing two-dimensional(2.)structures for transition-metal oxides(TMOs)can optimize their electronic structures and enable high specific surface areas,thereby offering routes to enhancing the performance of TMOs in energy storage and ***,most 2. TMOs,e.g.,Fe_(2.O^(3),remain so far synthetically challenging due to their intrinsic non-layered ***,inspired by the mechanism of biomineralization,we report the synthesis of CuO/Fe_(2.O^(3)hybrid ultrathin nanosheets by using polyvinylpyrrolidone-decorated CuO nanosheets as growth modifiers to modulate the hydrolysis process of Fe^(2.).The formulated“absorption-and-crystallization”two-step formation processes of such 2. hybrid structures accorded well with the biomineralization scheme in *** the in-situ transmission electron microscopy(TEM)study,theoretical calculation,and control experiments,we validated that the large density of 2./2. interfaces enabled by this bio-inspired synthesis process can overcome the self-stacking phenomenon during lithium-ion battery cycling,leading to their high operation *** work emphasizes the bio-inspired synthesis of 2. TMOs as a promising pathway toward material design and performance optimization.

关键词： bio-inspired synthesis two-dimensional transition-metal oxides hybrid nanosheets interfaces lithium-ion batteries

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高频率分辨的金刚石氮-空位色心宽频谱成像技术

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物理学报 2024年第6期73卷 339-348页

作者：申圆圆王博柯冬倩郑斗斗李中豪温焕飞郭浩李鑫唐军马宗敏李艳君伊戈尔·费拉基米罗维奇·雅明斯基刘俊中北大学省部共建动态测试技术国家重点实验室太原030051 中北大学半导体与物理学院太原030051 中北大学量子传感与精密测量山西省重点实验室太原030051 太原工业学院电子工程系太原030008 日本大阪大学工学研究科大阪5650871 俄罗斯国立莫斯科大学先进技术中心莫斯科119311

高分辨率宽频谱测量技术在天文学、无线通信、医学成像等领域具有重要应用价值.金刚石氮-空位(nitrogen-vacancy,NV)色心因其高稳定性、高灵敏度、实时监测、单点探测以及适用于长时间测量等特性已成为频谱分析仪备受关注的选择.目前,基... 详细信息

高分辨率宽频谱测量技术在天文学、无线通信、医学成像等领域具有重要应用价值.金刚石氮-空位(nitrogen-vacancy,NV)色心因其高稳定性、高灵敏度、实时监测、单点探测以及适用于长时间测量等特性已成为频谱分析仪备受关注的选择.目前,基于NV色心作为探测器的宽频谱分析仪能够在几十GHz频带内进行实时频谱分析,然而其频率分辨率仅达到MHz水平.本文通过搭建结合连续外差技术的量子金刚石微波频谱成像系统,利用磁场梯度对NV色心谐振频率进行空间编码,成功获取了900 MHz—6.0 GHz范围内完整的频谱数据.在可测频谱范围内,系统进一步采用连续外差的方法,同时施加谐振微波和轻微失谐的辅助微波对NV色心进行有效激发,增强了NV磁强计对微弱微波信号的响应.该方法使系统在可测频谱范围内实现了1 Hz的频率分辨率,并能够对间隔为1 MHz扫频步进的多个频点的频率分辨率进行单独测量.以上研究结果表明基于NV色心的宽频谱测量可实现Hz级频率分辨,为未来的频谱分析和应用提供了有力的技术支持.

关键词：氮-空位色心宽频谱测量高频率分辨率

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Superconductivity above 70 K observed in lutetium polyhydrides

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Science China(physics,Mechanics & Astronomy) 2023年第6期66卷 95-100页

作者： Zhiwen li Xin He Changling Zhang Ke Lu Baosen Min Jun Zhang Sijia Zhang Jianfa Zhao Luchuan Shi Yi Peng Shaomin Feng {2. Deng Jing Song Qingqing liu Xiancheng Wang Richeng Yu Luhong Wang Yingzhe li Jay D.Bass Vitali Prakapenka Stella Chariton Haozhe liu Changqing Jin Beijing National Laboratory for Condensed Matter physics Institute of PhysicsChinese Academy of SciencesBeijing100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing100190China Songshan Lake Materials Laboratory Dongguan523808China Shanghai Advanced Research in Physical Sciences Shanghai201203China department of Geology University of Illinois at Urbana ChampaignUrbana61801USA Center for Advanced Radiations Sources University of ChicagoChicago60637USA Center for High Pressure Science&Technology Advanced Research Beijing100094China

The binary polyhydrides of heavy rare earth lutetium that shares a similar valence electron configuration to lanthanum have been experimentally discovered to be *** lutetium polyhydrides were successfully synthesized at high pressure and high temperature conditions using a diamond anvil cell in combinations with the in-situ high pressure laser heating *** resistance measurements as a function of temperature were performed at the same pressure of synthesis in order to study the transitions of superconductivity(SC).The superconducting transition with a maximum onset temperature(Tc)71 K was observed at pressure of 2.8 GPa in the *** Tcdecreased to 65 K when pressure was at 181 *** the evolution of SC at applied magnetic fields,the upper critical field at zero temperatureμ0Hc2.0)was obtained to be~36 *** in-situ high pressure X-ray diffraction experiments imply that the high TcSC should arise from the Lu4H2.phase with Pm3n symmetry that forms a new type of hydrogen cage framework different from those reported for previous light rare earth polyhydride superconductors.

关键词： lutetium polyhydrides superconductors at high pressures high pressure synthesis

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Rapid Ferroelectric‑Photoexcited Bacteria‑Killing of Bi_(4)Ti_(3)O_(12./Ti_(3)C_(2.T_(x) Nanofiber Membranes

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Advanced Fiber Materials 2023年第2期5卷 484-496页

作者： Zhiying Wang Jianfang li Yuqian Qiao Xiangmei liu Yufeng {2. Zhaoyang li Jie Shen Yu Zhang Shengli Zhu Hui Jiang Yanqin liang Zhenduo Cui Paul KChu Shuilin Wu The Key Laboratory of Advanced Ceramics and Machining Technology by the Ministry of Education of China School of Materials Science and EngineeringTianjin UniversityTianjin 300072China School of Materials Science and Engineering Peking UniversityBeijing 100871China School of Health Science and Biomedical Engineering Hebei University of TechnologyTianjin 300401China Shenzhen Key Laboratory of Spine Surgery Department of Spine SurgeryPeking University Shenzhen HospitalShenzhen 518036China department of Orthopedics Guangdong Provincial People’s HospitalGuangdong Academy of Medical SciencesGuangzhou 510080China department of physics Department of Materials Science and Engineeringand Department of Biomedical EngineeringCity University of Hong KongHong Kong 999077China

In this study,an antibacterial nanofiber membrane[polyvinylidene fluoride/Bi_(4)Ti_(3)O_(12./Ti_(3)C_(2.T_(x)(PVDF/BTO/Ti_(3)C_(2.T_(x))]is fabricated using an electrostatic spinning process,in which the self-assembled BTO/Ti_(3)C_(2.T_(x) heterojunction is incorporated into the PVDF *** from the internal electric field induced by the spontaneously ferroelectric polarization of BTO,the photoexcited electrons and holes are driven to move in the opposite direction inside BTO,and the electrons are transferred to Ti_(3)C_(2.T_(x) across the Schottky ***,directed charge separation and transfer are realized through the cooperation of the two *** recombination of electron–hole pairs is maximumly inhibited,which notably improves the yield of reactive oxygen species by enhancing photocatalytic ***,the nanofiber membrane with an optimal doping ratio exhibits outstanding visible light absorption and photothermal conversion ***-mately,photothermal effect and ferroelectric polarization enhanced photocatalysis endow the nanofiber membrane with the ability to kill 99.61%±0.2.%Staphylococcus aureus and 99.71%±0.16%Escherichia coli under 2. min of light *** study brings new insights into the design of intelligent antibacterial textiles through a ferroelectric polarization strategy.

关键词： Ferroelectric polarization Antibacterial nanofiber Ti_(3)C_(2.T_(x) Photocatalysis Schottky heterojunction

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Interface enhanced superconductivity in monolayer FeSe films on MgO(001):charge transfer with atomic substitution

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Science Bulletin 2018年第12期63卷 747-752页

作者： Guanyu Zhou Qinghua Zhang Fawei zheng Ding Zhang Chong liu Xiaoxiao Wang Can-{2. Song Ke He Xu-Cun Ma {2.n Gu Ping Zhang {2.{2. Wang Qi-Kun Xue State Key Laboratory of Low-Dimensional Quantum physics Department of PhysicsTsinghua UniversityBeijing 100084China Laboratory for Advanced Materials&Electron Microscopy Beijing National Laboratory for Condensed Matter PhysicsInstitute of PhysicsChinese Academy of SciencesBeijing 100190China Institute of applied physics and Computational Mathematics Beijing 100088China Collaborative Innovation Center of Quantum Matter Beijing 100084China

Interface enhanced superconductivity over 50 K has been discovered in monolayer Fe Se films grown on several TiO_2.terminated oxide *** such phenomenon exists in other oxide substrates remains an extremely interesting *** we report enhanced superconductivity with an onset transition temperature of 18 K in monolayer Fe Se on Mg O(001) substrate by transport *** transmission electron microscopy investigation on the interface structure indicates that Fe Se films grow epitaxially on Mg O(001) and that overlayer Fe atoms diffuse into the top two layers of Mg O and substitute Mg *** density functional theory calculations reveal that this substitution promotes the charge transfer from the Mg O substrate to the Fe Se films,an essential process that also occurs in monolayer Fe Se on TiO_2.terminated oxides and contributes to the enhanced superconductivity *** finding suggests that superconductivity enhancement in monolayer Fe Se films on oxides substrates is rather general as long as charge transfer is allowed at the interface,thus pointing out an explicit direction for searching for new high temperature superconductivity by interface engineering.

关键词： FeSe/MgO interface Interface superconductivity Transport measurement Scanning transmission electron microscopy

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