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历史教学问题 2010年第1期 39-53,F0002页

作者：郑异凡本刊记者《历史教学问题》编辑部

郑先生，您是著名的苏联史研究专家，成果丰赡，思想深刻，学风严正，对我国苏联史研究作出了重要贡献。听说您原先倾心于中国语言文学专业，请谈谈后来怎么会转换门庭，从事苏联史研究的。

关键词：研究员本真历史苏联史语言文学

Synthesis of M_xH_yTi_3O_7 nanotubes by simple ion-exchanged process and their adsorption property

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Chinese Science Bulletin 2007年第18期52卷 2491-2495页

作者： SONG XuChun YANG E zheng yifan Department of Chemistry Fujian Normal University Fuzhou 350007 China College of Chemical Engineening & Materials Science Zhejiang University of Technology Hangzhou 310004 China

The MxHyTi3O7 (M=K, Fe, Zn, Co, Na, Ag) nanotubes were prepared by ion-exchange reactions, in which H2Ti3O7 nanotube reacted with salts of K2SO4, Na2SO4, Fe(NO3)3, ZnSO4, Co(NO3)2 and AgNO3 in solution respectively. The properties of products were characterized by SEM, TEM, XRD and EDX. Synthesis of MxHyTi3O7 nanotubes by ion-exchanged process was proved by our experimental results. The adsorp- tion properties of MxHyTi3O7 nanotube for methylene blue in aqueous solution were studied.

关键词：纳米材料钛酸盐纳米管离子交换过程吸收特征

Distribution pattern and geochemical analysis of rare earth elements in deep-ocean sediments

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Journal of Oceanology and Limnology 2021年第1期39卷 79-88页

作者： Jingxi LI Chengjun SUN Fenghua JIANG Fenglei GAO yifan zheng Key Laboratory of Marine Eco-environmental Science and Technology Marine Bioresource and Environment Research CenterFirst Institute of OceanographyMinistry of Natural ResourcesQingdao 266061China Laboratory of Marine Drugs and Bioproducts Qingdao National Laboratory for Marine Science and TechnologyQingdao 266071China

The content and distribution pattern of rare earth elements(REEs)in surface sediments from the Eastern and Western Pacifi c Ocean,the Northern and Southern Atlantic Ocean,and the Southwestern Indian Ocean were explored and the resources and geochemical characteristics of REEs in deep-ocean sediments from diff erent oceans were *** total REE abundances(ΣREE)in the diff erent oceans ranged as follows:Eastern Pacifi c,56.88–500.02μg/g;Western Pacifi c,290.68–439.94μg/g;Northern Atlantic,55.33–154.90μg/g;Southern Atlantic,40.83–69.30μg/g;and Southwestern Indian Ocean,20.24–64.76μg/*** corresponding LREE(La-Eu)/HREE(Gd-Lu)average values were 5.18,5.86,9.01,5.21,and 4.59,which indicated that the light REEs were all evidently enriched.δEu andδCe showed slight Eu-negative anomalies and signifi cant Ce-positive anomalies in all *** the contents of REEs in the sediments varied among the diff erent oceans,the distribution patterns of REEs were similar,and the correlation coeffi cient was greater than *** the Eastern Pacifi c sediments,ΣREE showed a signifi cantly positive correlation with Co,Cu,Zn,Mn,Mo and a weak correlation with *** the Western Pacifi c and Southern Atlantic sediments,ΣREE presented no obvious correlation and a weakly negative correlation with Co,Cu,Zn,Mn,Mo and Fe,respectively.ΣREE in the Southwestern Indian Ocean sediments positively correlated with Cu,Zn,Mn,Mo,Fe,and had a weakly negative correlation with Co.

关键词： rare earth elements(REE)geochemistry distribution pattern REE fractionation marine sediment

Control of vertical phase separation in high performance non-fullerene organic solar cell by introducing oscillating stratification preprocessing

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Nano Research 2021年第5期14卷 1319-1325页

作者： Dayong Zhang Pu Fan Jinyu Shi yifan zheng Jian Zhong Junsheng Yu State Key Laboratory of Electronic Thin Films and Integrated Devices School of Optoelectronic Science and EngineeringUniversity of Electronic Science and Technology of ChinaChengdu610054China Shanghai Institute of Optics and Fine Mechanics Chinese Academy of SciencesShanghai201800China

Non-fullerene organic solar cell(NFOSC)has attracted tremendous attention due to their great potential for commercial *** improve its power conversion efficiency(PCE),generally,sequential solution deposition(SSD)methods have been employed to construct the graded vertical phase separation(VPS)of the bulk-heterojunction(BHJ)active layer for efficient exciton separation and charge ***,a variety of orthogonal solvents used in the SSD may lead to the unpredicted change in the BHJ morphology and introduce additional defects inside the BHJ bulk thus complicate the fabrication ***,a simple oscillating stratification preprocessing(OSP)is developed to facilitate the formation of graded VPS among the BHJ *** a result,a significant improvement is obtained in PCE from 10.96%to 12.03%,which is the highest value reported among PBDB-T:ITIC based NFOSC.

关键词： oscillating stratification preprocessing graded vertical phase separation non-fullerene organic solar cells high performance sequential solution deposition

Learning Scalable Task Assignment with Imperative-Priori Conflict Resolution in Multi-UAV Adversarial Swarm Defense Problem

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Journal of Systems Science & Complexity 2024年第1期37卷 369-388页

作者： ZHAO Zhixin CHEN Jie XIN Bin LI Li JIAO Keming zheng yifan School of Electronics and Information Engineering Tongji UniversityShanghai 201804China Shanghai Institute of Intelligent Science and Technology Tongji UniversityShanghai 201804China School of Automation Beijing Institute of TechnologyBeijing 100081China National Key Laboratory of Autonomous Intelligent Unmanned Systems Beijing 100081China Shanghai Institute of Intelligent Science and Technology Tongji UniversityShanghai 201804China.

The multi-UAV adversary swarm defense(MUASD)problem is to defend a static base against an adversary UAV swarm by a defensive UAV *** the problem into task assignment and low-level interception strategies is a widely used ***-based approaches for task assignment are a promising *** studies on learning-based methods generally assume decentralized decision-making architecture,which is not beneficial for conflict *** contrast,centralized decision-making architecture is beneficial for conflict resolution while it is often detrimental to *** achieve scalability and conflict resolution simultaneously,inspired by a self-attention-based task assignment method for sensor target coverage problem,a scalable centralized assignment method based on self-attention mechanism together with a defender-attacker pairwise observation preprocessing(DAP-SelfAtt)is ***,an imperative-priori conflict resolution(IPCR)mechanism is proposed to achieve conflict-free ***,the IPCR mechanism is parallelized to enable efficient *** validate the algorithm,a variant of proximal policy optimization algorithm(PPO)is employed for training in scenarios of various *** experimental results show that the proposed algorithm not only achieves conflict-free task assignment but also maintains scalability,and significantly improve the success rate of defense.

关键词： Conflict resolution reinforcement learning scalability task assignment.

An additive dripping technique using diphenyl ether for tuning perovskite crystallization for high-efficiency solar cells

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Nano Research 2018年第5期11卷 2648-2657页

作者： Di Huang Tenghooi Goh yifan zheng Zilun Qin Jiao Zhao Suling Zhao zheng Xu Andre D. Taylor Key Laboratory of Luminescence and Optical Information (Beijing Jiaotong University) Ministry of Education Beijing 100044 China Department of Chemical and Environmental Engineering Yale University New Haven CT06511 USA Institute of Optoelectronics Technology Beijing Jiaotong University Beijing 100044 China

Controlling the morphology of the MAPbI3-xClx active layer has remained a challenge towards advancing perovskite solar cells （PvSCs）. Here, we demonstrate that a low temperature additive dripping （AD） treatment step, using diphenyl ether （DPE）, can significantly improve the power conversion efficiency （PCE）, compared to the control device using chlorobenzene （CB）, by 15% up to 16.64%, with a high current density （Jsc） of 22.67 mA/cm^2. We chose DPE for its small and appropriate dipole moment to adjust the solubility of the MAPbI3-xClx precursor during the formation of the intermediate phase and the MAPbI3-xClx phase. The low DPE vapor pressure provides a longer processing window for the removal of residual dimethylformamide （DMF）, during the annealing process, for improved perovskite formation. Imaging and X-ray analysis both reveal that the MAPbI3-xClx film exhibits enlarged grains with increased crystallinity. Together, these improvements result in reduced carrier recombination and hole trap-state density in the MAPbI3-xClx film, while minimizing the hysteresis problem typical of PvSCs. These results show that the AD approach is a promising technique for improving PvSCs.

关键词： perovskite solar cells additive dripping crystallinity diphenyl ether (DPE)

Interior and Exterior Decoration of Transition Metal Oxide Through Cu^(0)/Cu^(+) Co-Doping Strategy for High-Performance Supercapacitor

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Nano-Micro Letters 2021年第4期13卷 96-109页

作者： Weifeng Liu Zhi Zhang Yanan Zhang yifan zheng Nishuang Liu Jun Su Yihua Gao Center for Nanoscale Characterization and Devices(CNCD) School of Physics and Wuhan National Laboratory for Optoelectronics(WNLO)Huazhong University of Science and Technology(HUST)Luoyu Road 1037Wuhan 430074People’s Republic of China College of Materials Science and Engineering Guangxi Key Laboratory of Optical and Electronic Materials and DevicesGuilin University of TechnologyGuilin 541004People’s Republic of China

Although CoO is a promising electrode material for supercapacitors due to its high theoretical capacitance,the practical applications still suffering from inferior electrochemical activity owing to its low electrical conductivity,poor structural stability and inefficient ***,we report a novel Cu0/Cu+co-doped CoO composite with adjustable metallic Cu0 and ion Cu+via a facile *** interior(Cu+)and exterior(Cu0)decoration of CoO,the electrochemical performance of CoO electrode has been significantly improved due to both the beneficial flower-like nanostructure and the synergetic effect of Cu0/Cu+co-doping,which results in a significantly enhanced specific capacitance(695 F g^(-1) at 1 A g^(-1))and high cyclic stability(93.4%retention over 10,000 cycles)than pristine ***,this co-doping strategy is also applicable to other transition metal oxide(NiO)with enhanced electrochemical *** addition,an asymmetric hybrid supercapacitor was assembled using the Cu0/Cu+co-doped CoO electrode and active carbon,which delivers a remarkable maximal energy density(35 Wh kg^(-1)),exceptional power density(16 kW kg^(-1))and ultralong cycle life(91.5%retention over 10,000 cycles).Theoretical calculations further verify that the co-doping of Cu^(0)/Cu^(+)can tune the electronic structure of CoO and improve the conductivity and electron *** study demonstrates a facile and favorable strategy to enhance the electrochemical performance of transition metal oxide electrode materials.

关键词： Cu^(0)/Cu^(+)co-doping Heterostructure Transition metal oxide Supercapacitor

Core-Shell Semiconductor-Graphene Nanoarchitectures for Efficient Photocatalysis:State of the Art and Perspectives

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Nano-Micro Letters 2024年第12期16卷 553-588页

作者： Jinshen Lan Shanzhi Qu Xiaofang Ye yifan zheng Mengwei Ma Shengshi Guo Shengli Huang Shuping Li Junyong Kang Engineering Research Center of Micro-Nano Optoelectronic Materials and Devices Ministry of EducationFujian Key Laboratory of Semiconductor Materials and ApplicationsCI Center for OSEDDepartment of PhysicsXiamen UniversityXiamen 361005People’s Republic of China

Semiconductor photocatalysis holds great promise for renewable energy generation and environment remediation,but generally suffers from the serious drawbacks on light absorption,charge generation and transport,and structural stability that limit the *** core-shell semiconductorgraphene(CSSG)nanoarchitectures may address these issues due to their unique structures with exceptional physical and chemical *** review explores recent advances of the CSSG nanoarchitectures in the photocatalytic *** starts with the classification of the CSSG nanoarchitectures by the ***,the construction methods under internal and external driving forces were introduced and compared with each ***,the physicochemical properties and photocatalytic applications of these nanoarchitectures were discussed,with a focus on their role in *** ends with a summary and some perspectives on future development of the CSSG nanoarchitectures toward highly efficient photocatalysts with extensive *** harnessing the synergistic capabilities of the CSSG architectures,we aim to address pressing environmental and energy challenges and drive scientific progress in these fields.

关键词： Core-shell semiconductor-graphene Nanoarchitecture Photocatalysis Driving force Interface

Perovskite solar cell towards lower toxicity: a theoretical study of physical lead reduction strategy

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Science Bulletin 2019年第17期64卷 1255-1261页

作者： yifan zheng Rui Su Zhaojian Xu Deying Luo Hua Dong Bo Jiao Zhaoxin Wu Qihuang Gong Rui Zhu State Key Laboratory for Mesoscopic Physics School of Physics Nano-optoelectronics Frontier Center of Ministry of Education (NFC-MOE)& Collaborative Innovation Center of Quantum Matter Peking University Beijing 100871 China Collaborative Innovation Center of Extreme Optics Shanxi University Taiyuan 030006 China Key Laboratory of Photonics Technology for Information Key Laboratory for Physical Electronics and Devices of the Ministry o f Education Department o f Electronic Science and Technology School of Electronic and Information Engineering Xi'an Jiaotong University Xi'an 710049 China

The huge performance enhancements of the organometal halide perovskite solar cells(OHPSCs) have appealed enormous attention within recent ten years. Although the rapid growth of the device power conversion efficiency(PCE) has attained over 25%, the contamination of health-hazardous components still holds back its sustainable applications. To reduce the lead usage, many groups have tried chemical lead reduction solutions: substituting the lead by other group 14 metal elements to realize the low-lead OHPSCs. Unfortunately, neither the PCE nor the stability, low-lead OHPSCs all lag far behind the state-ofthe-art conventional lead-based OHPSCs. In this work, we present a physical lead reduction(PLR) concept by reducing the perovskite film thickness to restrict the perovskite hazard risk with minor scarification in device performances. Through the simulation of transfer matrix model, we theoretically demonstrated that by introducing the optical space layer, the device PCE could maintain 96% of the original maximum value while attenuating the perovskite film thickness to one-third. This means that the usage of lead can be reduced by $70% with PLR concept, which could have broad appeal as a new lead reduction strategy towards high performance OHPSCs.

关键词： Perovskite solar cell Physical lead reduction Low toxicity Optical space layer Transfer matrix model

Facile and Economical Electrochemical Dehalogenative Deuteration of(Hetero)Aryl Halides

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CCS Chemistry 2021年第11期3卷 2669-2675页

作者： Lijun Lu Hao Li yifan zheng Faxiang Bu Aiwen Lei Institute for Advanced Studies(IAS) College of Chemistry and Molecular SciencesWuhan UniversityWuhan 430072 National Research Center for Carbohydrate Synthesis Jiangxi Normal UniversityJiangxi 330022

Deuterated compounds are valuable in synthetic,pharmaceutical,and analytical *** deuteration of halides is a widespread method for highly site-selective deuterium ***,the facile,efficient,and economical deuterium incorporation remains *** this work,we introduced a practical deuteration of(hetero)aryl halides through an electrochemical reduction *** transformation proceeded smoothly at room temperature without metal catalysts,external reductants,or toxic or dangerous ***,low-cost and chemically equivalent D2O was the sole deuterium source in this *** electrosynthesis equipment was not essential because we demonstrated common batteries and electrodes were enough for this reaction.

关键词： electrochemical synthesis deuteration dehalogenation aryl halides deuterium oxide