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Strategies for improving extraction capacity through preorganization structure:A novel 5,6-bicyclicmalonamide extractant(THPPD)

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Journal of Rare Earths 2024年第4期42卷 768-774页

作者： Miaomiao Zhang Zhen Yang Yuhua cui Jianhui Su heng Zhao Chengjin Xu Xiaolei Liu Guoxin Sun Xiujing Peng Yu cui School of Chemistry and Chemical Engineering University of JinanJinan250022China Institute for Smart Materials&Engineering University of JinanJinan250022China Shandong Institute for Food and Drug Control Jinan250101China

Rational design of extractant structure to improve the extraction and separation capacity of rare earth elements(REEs)is a long-standing challenge.Herein,a new strategy was proposed to improve the stability of the chelating structure formed by malonamide and REEs.The stability of the chelating structure is greatly improved by using a double-ring framework structure which makes the two carbonyl groups of malonamide unable to rotate freely and both of them point to the metal ion position.Three benzyl groups were used to construct the hydrophobicity of the extractant and the organic shell of the extracted species.Tribenzylhexahydro-pyrrolo-pyridine-dione(THPPD)was designed and synthesized.The structure reduces the energy consumed by rotating carbonyl group in the coordination with metal ions and then improves the extraction ability of extractant.The crystal structure was preorganized as expected,with the two carbonyls pointing in a favorable coordination direction to the structural complement of the metal ion.The extraction behaviors of REEs with THPPD in a nitric acid medium were studied.Compared with N,N’-dibenzyl-N,N’-dimethylmalonamide(DBDM-MA)with a chain structure,the extraction capacity of THPPD is 360 times higher than that of DBDM-MA at 5.0 mol/L sodium nitrate.Furthermore,the binding energy and Gibbs free energy were investigated by density functional theory(DFT)in conjunction with the B3LYP.The theoretical results show that THPPD has more effective interaction with Pr(NO_(3))3 than DBDM-MA.The construction of chelating groups conformation is a worthy direction to improve the coordination ability and even selectivity of extractant.

关键词： Rare earth elements Extraction separation 5,6-bicyclicdiamide extractant

Changes of coastline and tidal flat and its implication for ecological protection under human activities: Take China’s Bohai Bay as an example

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China Geology 2024年第1期7卷 26-35页

作者： Yong Li Ming-zheng Wen heng Yu Peng Yang Fei-cui Wang Fu Wang Tianjin Center China Geological SurveyMinistry of Natural ResourcesTianjin 300170China Key Laboratory of Coast Geo-environment China Geological SurveyMinistry of Natural ResourcesTianjin 300170China Tianjin Key Laboratory of Coast Geological Processes and Environmental Safety Tianjin 300170China Hebei University of Environmental Engineering Qinhuangdao 066102China Hebei Engineering Research Center for Ecological Restoration of seaward Rivers and Coastal Waters Qinhuangdao 066102China Department of Earth and Environment Boston UniversityBoston 02215USA

The change processes and trends of shoreline and tidal flat forced by human activities are essential issues for the sustainability of coastal area,which is also of great significance for understanding coastal ecological environment changes and even global changes.Based on field measurements,combined with Linear Regression(LR)model and Inverse Distance Weighing(IDW)method,this paper presents detailed analysis on the change history and trend of the shoreline and tidal flat in Bohai Bay.The shoreline faces a high erosion chance under the action of natural factors,while the tidal flat faces a different erosion and deposition patterns in Bohai Bay due to the impact of human activities.The implication of change rule for ecological protection and recovery is also discussed.Measures should be taken to protect the coastal ecological environment.The models used in this paper show a high correlation coefficient between observed and modeling data,which means that this method can be used to predict the changing trend of shoreline and tidal flat.The research results of present study can provide scientific supports for future coastal protection and management.

关键词： Shoreline Tidal flat Erosion deposition patterns Changing trend Ecological protection Human activity Linear regression model Inverse distance weighing method Prediction Bohai Bay

Highly uniform Co-Cu bimetallic sulfides for rechargeable alkaline aqueous zinc batteries

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Chinese Chemical Letters 2024年第2期35卷 521-526页

作者： Xiaofang Bai Yuwei Zhao Mangwei cui Tianshuo Guo Zijie Tang Chuan Li heng Gao Shuo Yang Lingzhi Zhao Chunyi Zhi Hongfei Li Department of Materials Science and Engineering Southern University of Science and TechnologyShenzhen 518055China Songshan Lake Materials Laboratory Dongguan 523808China Department of Materials Science and Engineering City University of Hong KongHong KongChina International Centre for Quantum and Molecular Structures Department of PhysicsShanghai UniversityShanghai 200444China Guangdong Provincial Engineering Technology Research Center for Low Carbon and Advanced Energy Materials Institute of Semiconductor Science and TechnologySouth China Normal UniversityGuangzhou 510631China

Rechargeable alkaline aqueous zinc batteries(RAZBs)have attracted increasing attention.However,most RAZBs are hindered by the limited availability of cathode materials.The practical electrochemical performance of most cathode materials is lower than the theoretical value due to their poor electrical conductivity and low utilization capacity.In this work,we develop a facile hydrothermal procedure to prepare highly uniform bimetallic sulfides as novel cathode materials for RAZBs.Copper-cobalt binary metallic oxides materials possess higher conductivity and larger capacity compared with their mono-metal oxides compounds due to bimetallic synergistic effects and multiple oxidation states.Furthermore,bimetallic sulfide compounds have smaller bond energy and longer bond length than their oxides,leading to less structural damage,faster kinetics of electrochemical reactions,and better stability.The as-prepared Co-Cu bimetallic sulfides show enhanced electrochemical performance due to various valences of Co and Cu as well as the existence of S.As a result,aqueous Zn/CuCo_(2)S_(4) battery shows a high specific capacity of 117.4 mAh/g at 4 A/g and a good cycle life of over 8000 cycles.Based on PANa hydrogel electrolytes,a flexible Zn/CuCo_(2)S_(4) battery demonstrates excellent cycling stability.This battery can also meet the requirements of electronic devices with different shapes and performs well in extreme environments,such as freezing,drilling,and hammering.This work opens new avenues to obtain high-rate and long-life cathode materials for RAZBs by utilizing the synergistic effects of bimetallic sulfides and provides a new platform for flexible energy storage devices.

关键词： Aqueous zinc batteries Bimetallic sulfides Cathode materials Rate performance Cycling stability

Effect of carbon addition on microstructure and mechanical properties of a typical hard-to-deform Ni-base superalloy

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Progress in Natural Science:Materials International 2023年第2期33卷 232-243页

作者： Lei Jia heng cui Shufeng Yang Shaomin Lv Xingfei Xie Jinglong Qu Collaborative Innovation Center of Steel Technology University of Science and Technology Beijing State Key Laboratory of Advanced Metallurgy University of Science and Technology Beijing Beijing GAONA Materials & Technology Co. Ltd. High-Temperature Materials Institute Central Iron and Steel Research Institute

In this paper, the as-cast microstructure, microsegregation, and mechanical properties of GH4151 superalloys with a carbon addition were studied by scanner electron microscopy(SEM), transmission electron microscope(TEM), electron probe microanalysis(EPMA), differential thermal analyzer(DSC), and electron backscattered diffraction(EBSD). The results show that the solid solution effect of carbon in alloys is limited, the addition of C from 0.01 to 0.08 wt% significantly refines the secondary dendrite spacing(SDAS) from 61.7 to 57.4 and 51.8 μm.Due to the influence of thermal solutal convection, the most severe segregation is found in the C-0.04 alloy, and the solidification ranges of C-0.01, C-0.04, and C-0.08 alloys are 87°C, 96°C, and 83°C, respectively. Owing to the reduced solidification pores and formed finely dispersed carbides, C-0.04 shows excellent ultimate tensile strength(442 MPa) and superior total elongation(1.368%) at 1100°C much better than that of C-0.01(130.7MPa, 0.085%) and C-0.08(248 MPa, 1.026%).

关键词： GH4151 superalloys Carbon Microstructure and microsegregation Mechanical properties

Significantly enhanced superconductivity in monolayer FeSe films on SrTiO3（001） via metallic δ-doping

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National Science Review 2024年第3期11卷 119-127页

作者： Xiaotong Jiao Wenfeng Dong Mingxia Shi heng Wang cui Ding Zhongxu Wei Guanming Gong Yanan Li Yuanzhao Li Binjie Zuo Jian Wang Ding Zhang Minghu Pan Lili Wang Qi-Kun Xue State Key Laboratory of Low-Dimensional Quantum Physics Department of Physics Tsinghua University School of Physics&Information Technology Shaanxi Normal University Beijing Academy of Quantum Information Sciences Department of Physics Southern University of Science and Technology International Center for Quantum Materials School of Physics Peking University Department of Physics The Pennsylvania State University Collaborative Innovation Center of Quantum Matter Hefei National Laboratory

Superconductivity transition temperature（Tc） marks the inception of a macroscopic quantum phase-coherent paired state in fermionic systems. For 2D superconductivity, the paired electrons condense into a coherent superfluid state at Tc, which is usually lower than the pairing temperature, between which intrinsic physics including Berezinskii–Kosterlitz–Thouless transition and pseudogap state are hotly debated. In the case of monolayer FeSe superconducting films on SrTiO3（001）, although the pairing temperature（Tp） is revealed to be 65–83 K by using spectroscopy characterization, the measured zero-resistance temperature（Tc0） is limited to 20 K. Here, we report significantly enhanced superconductivity in monolayer FeSe films by δ-doping of Eu or Al on SrTiO3（001） surface, in which Tc0is enhanced by 12 K with a narrowed transition width ΔTc～8 K, compared with non-doped samples. Using scanning tunneling microscopy/spectroscopy measurements, we demonstrate lowered work function of the δ-doped SrTiO3（001） surface and enlarged superconducting gaps in the monolayer FeSe with improved morphology/electronic homogeneity. Our work provides a practical route to enhance 2D superconductivity by using interface engineering.

关键词： monolayer FeSe interface superconductivity δ-doping zero-resistance temperature superconductivity transition temperature

“转向东方”话语下的中俄“东北-远东”地方合作

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俄罗斯研究 2024年第1期 154-173页

作者：崔珩上海政法学院中国-上海合作组织国际司法交流培训合作基地教育部人文社会科学重点研究基地华东师范大学俄罗斯研究中心

普京在2012年开启第三个总统任期后,迅速将以远东开发为载体的“转向东方”政策提上议事日程。2014年乌克兰危机后,俄罗斯进一步将“转向东方”作为国家外交突围、经济纾困的主要策略。2022年俄乌冲突爆发后,在遭受西方阵营集体排挤的... 详细信息

普京在2012年开启第三个总统任期后,迅速将以远东开发为载体的“转向东方”政策提上议事日程。2014年乌克兰危机后,俄罗斯进一步将“转向东方”作为国家外交突围、经济纾困的主要策略。2022年俄乌冲突爆发后,在遭受西方阵营集体排挤的情况下,“转向东方”更是成为俄罗斯避免经济被完全排除在全球循环之外的主要依托,也是为俄罗斯经济寻找新增长点的希望。“东北-远东”地方合作是俄罗斯“转向东方”以及中国“一带一路”与欧亚经济联盟对接的重要成果之一。比较2012年和2022年的“转向东方”,心理、经济、地理结构存在明显差异,使得当前俄罗斯“转向东方”的面貌与十年前相比有不同的呈现,主要表现为:在心理结构上,与西方国家的关系危机严重削弱了俄罗斯的“西方中心主义”倾向;在经济结构上,中国长期高速发展使得俄罗斯“转向东方”依赖中俄合作;在地理结构上,“软硬”基础设施缩短了俄罗斯与东亚的空间距离。与2012年相比,2022年以来俄罗斯“转向东方”无疑更接近于战略选择,而非技术性调整。俄罗斯正以空前开放的姿态面向与中国的合作,为未来中俄“东北-远东”地方合作的全面铺开奠定了基础。

关键词：俄乌冲突中俄关系 “转向东方” 中俄“东北-远东”合作

建成环境对共享单车高峰出行的非线性影响——以厦门主岛为例

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南方建筑 2024年第1期 20-28页

作者：汪晴崔珩西南交通大学建筑学院

旨在探究建成环境对共享单车高峰出行的影响,为解决单车供需时空不平衡问题提供理论参考。以厦门为例,利用随机森林算法探究不同时段下建成环境要素对单车到达密度的非线性影响,发现土地利用因素对单车出行的影响最显著,且存在明显的阈... 详细信息

旨在探究建成环境对共享单车高峰出行的影响,为解决单车供需时空不平衡问题提供理论参考。以厦门为例,利用随机森林算法探究不同时段下建成环境要素对单车到达密度的非线性影响,发现土地利用因素对单车出行的影响最显著,且存在明显的阈值效应;交通站点对单车到达密度影响具有距离衰减效应;道路设计因素对单车到达密度存在明显的U型影响关系。在促进低碳出行的背景下,应当识别单车活动的重要区域和各时段单车流向,综合考虑街区尺度、骑行安全性与通行效率、站点驳接距离特点,提升公共交通与单车衔接度,科学规划骑行基础设施。

关键词：共享单车骑行目的地随机森林建成环境非线性影响厦门岛

Characterization of candidate factors associated with the metastasis and progression of high-grade serous ovarian cancer

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Chinese Medical Journal 2023年第24期136卷 2974-2982页

作者： Huiping Liu Ling Zhou Hongyan Cheng Shang Wang Wenqing Luan E Cai Xue Ye Honglan Zhu heng cui Yi Li Xiaohong Chang Department of Obstetrics and Gynecology Peking University People’s HospitalBeijing 100044China Center of Gynecologic Oncology Peking University People’s HospitalBeijing 100044China

Background:High-grade serous ovarian cancer(HGSOC)is the biggest cause of gynecological cancer-related mortality because of its extremely metastatic nature.This study aimed to explore and evaluate the characteristics of candidate factors associated with the metastasis and progression of HGSOC.Methods:Transcriptomic data of HGSOC patients’samples collected from primary tumors and matched omental metastatic tumors were obtained from three independent studies in the National Center for Biotechnology Information(NCBI)Gene Expression Omnibus(GEO)database.Differentially expressed genes(DEGs)were selected to evaluate the effects on the prognosis and progression of ovarian cancer using data from The Cancer Genome Atlas(TCGA)database.Hub genes’immune landscapes were estimated by the Tumor Immune Estimation Resource(TIMER)database.Finally,using 25 HGSOC patients'cancer tissues and 10 normal fallopian tube tissues,immunohistochemistry(IHC)was performed to quantify the expression levels of hub genes associated with International Federation of Gynecology and Obstetrics(FIGO)stages.Results:Fourteen DEGs,ADIPOQ,ALPK2,BARX1,CD37,CNR2,COL5A3,FABP4,FAP,GPR68,ITGBL1,MOXD1,PODNL1,SFRP2,and TRAF3IP3,were upregulated in metastatic tumors in every database while CADPS,GATA4,STAR,and TSPAN8 were downregulated.ALPK2,FAP,SFRP2,GATA4,STAR,and TSPAN8 were selected as hub genes significantly associated with survival and recurrence.All hub genes were correlated with tumor microenvironment infiltration,especially cancer-associated fibroblasts and natural killer(NK)cells.Furthermore,the expression of FAP and SFRP2 was positively correlated with the International Federation of Gynecology and Obstetrics(FIGO)stage,and their increased protein expression levels in metastatic samples compared with primary tumor samples and normal tissues were confirmed by IHC(P=0.0002 and P=0.0001,respectively).Conclusions:This study describes screening for DEGs in HGSOC primary tumors and matched metastasis tumors using integrated bioinformatics analyses.We identif

关键词： High-grade serous ovarian cancer Metastasis Gene Expression Omnibus Prognosis Recurrence Immune infiltration

Fuzzy Proportional Integral Derivative control of a voice coil actuator system for adaptive deformable mirrors

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Astronomical Techniques and Instruments 2024年第3期1卷 179-186页

作者： Ziqiang cui heng Zuo Weikang Qiao Hao Li Fujia Du Yifan Wang Jinrui Guo Nanjing Institute of Astronomical Optics&Technology Chinese Academy of SciencesNanjing 210042China CAS Key Laboratory of Astronomical Optics&Technology Nanjing Institute of Astronomical Optics&TechnologyNanjing 210042China University of Chinese Academy of Sciences Beijing 100049China

Research on adaptive deformable mirror technology for voice coil actuators(VCAs)is an important trend in the development of large ground-based telescopes.A voice coil adaptive deformable mirror contains a large number of actuators,and there are problems with structural coupling and large temperature increases in their internal coils.Additionally,parameters of the traditional proportional integral derivative(PID)control cannot be adjusted in real-time to adapt to system changes.These problems can be addressed by introducing fuzzy control methods.A table lookup method is adopted to replace real-time calculations of the regular fuzzy controller during the control process,and a prototype platform has been established to verify the effectiveness and robustness of this process.Experimental tests compare the control performance of traditional and fuzzy proportional integral derivative(Fuzzy-PID)controllers,showing that,in system step response tests,the fuzzy control system reduces rise time by 20.25%,decreases overshoot by 78.24%,and shortens settling time by 67.59%.In disturbance rejection experiments,fuzzy control achieves a 46.09%reduction in the maximum deviation,indicating stronger robustness.The Fuzzy-PID controller,based on table lookup,outperforms the standard controller significantly,showing excellent potential for enhancing the dynamic performance and disturbance rejection capability of the voice coil motor actuator system.

关键词： Adaptive optics Deformable mirror Voice coil actuator Fuzzy control