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Tracking Regulatory Mechanism of Trace Fe on Graphene Electromagnetic Wave Absorption

Nano-Micro Letters 2024年第4期16卷 79-96页

作者： Kaili Zhang Yuhao liu Yanan liu yuefeng Yan Guansheng Ma Bo Zhong Renchao Che Xiaoxiao Huang School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001People’s Republic of China MIIT Key Laboratory of Advanced Structural‑Functional Integration Materials&Green Manufacturing Technology Harbin Institute of TechnologyHarbin 150001People’s Republic of China School of Materials Science and Engineering Harbin Institute of Technology at WeihaiWeihai 264209People’s Republic of China Laboratory of Advanced Materials Shanghai Key Lab of Molecular Catalysis and Innovative MaterialsFudan UniversityShanghai 200438People’s Republic of China

Polarization and conductance losses are the fundamental dielectric attenuation mechanisms for graphene-based absorbers, but it is not fully understood in revealing the loss mechanism of affect graphene itself. For the first time, the reduced graphene oxide(RGO) based absorbers are developed with regulatory absorption properties and the absorption mechanism of RGO is mainly originated from the carrier injection behavior of trace metal Fe nanosheets on graphene. Accordingly, the minimum reflection loss(RLmin) of Fe/RGO-2composite reaches-53.38 dB(2.45 mm), and the effective absorption bandwidth achieves 7.52 GHz(2.62 mm) with lower filling loading of 2 wt%. Using off-axis electron hologram testing combined with simulation calculation and carrier transport property experiments, we demonstrate here the carrier injection behavior from Fe to graphene at the interface and the induced charge accumulation and rearrangement, resulting in the increased interfacial and dipole polarization and the conductance loss. This work has confirmed that regulating the dielectric property of graphene itself by adding trace metals can not only ensure good impedance matching, but also fully exploit the dielectric loss ability of graphene at low filler content,which opens up an efficient way for designing lightweight absorbers and may be extended to other types materials.

关键词： Reduced graphene oxide Fe nanosheets Dielectric loss Electromagnetic wave absorption

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Metal-organic frameworks and their composites for advanced lithium-ion batteries:Synthesis,progress and prospects

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Journal of Energy Chemistry 2024年第2期89卷 449-470,I0011页

作者： Chengcai liu Borong Wu Tao liu Yuanxing Zhang Jingwen Cui Lingjun Huang Guoqiang Tan Ling Zhang yuefeng Su Feng Wu School of Material Science and Engineering Beijing Institute of TechnologyBeijing 100081China Chonging Innovation Center Beijing Institute of TechnologyChongqing 401120China Collaborative Innovation Center of Electric Vehicles in Beijing Beijing 100081China

Metal-organic frameworks(MOFs)are among the most promising materials for lithium-ion batteries(LIBs)owing to their high surface area,periodic porosity,adjustable pore size,and controllable chemical composition.For instance,their unique porous structures promote electrolyte penetration,ions transport,and make them ideal for battery separators.Regulating the chemical composition of MOF can introduce more active sites for electrochemical reactions.Therefore,MOFs and their related composites have been extensively and thoroughly explored for LIBs.However,the reported reviews solely include the applications of MOFs in the electrode materials of LIBs and rarely involve other aspects.A systematic review of the application of MOFs in LIBs is essential for understanding the mechanism of MOFs and better designing related MOFs battery materials.This review systematically evaluates the latest developments in pristine MOFs and MOF composites for LIB applications,including MOFs as the main materials(anode,cathode,separators,and electrolytes)to auxiliary materials(coating layers and additives for electrodes).Furthermore,the synthesis,modification methods,challenges,and prospects for the application of MOFs in LIBs are discussed.

关键词： Metal-organic frameworks Electrodes Electrolytes Separators Lithium-ion batteries

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Lithiophilic Li-Si alloy-solid electrolyte interface enabled by high-concentration dual salt-reinforced quasi-solid-state electrolyte

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Journal of Energy Chemistry 2024年第8期95卷 216-230页

作者： Yuanxing Zhang Ling Zhang Zhiguang Zhao Yuxiang Zhang Jingwen Cui Chengcai liu Daobin Mu yuefeng Su Borong Wu Feng Wu School of Materials Science and Engineering Beijing Institute of Technology Chongqing Innovation Center Beijing Institute of Technology Collaborative Innovation Center of Electric Vehicles in Beijing

Solid polymer electrolytes（SPEs） are urgently required to achieve practical solid-state lithium metal batteries（LMBs） and lithium-ion batteries（LIBs）,Herein,we proposed a mechanism for modulating interfacial conduction and anode interfaces in high-concentration SPEs by LiDFBOP.Optimized electrolyte exhibits superior ionic conductivity and remarkable interface compatibility with salt-rich clusters:（1）polymer-plastic crystal electrolyte（P-PCE,TPU-SN matrix） dissociates ion pairs to facilitate Li+transport in the electrolyte and regulates Li+diffusion in the SEI.The crosslinking structure of the matrix compensates for the loss of mechanical strength at high-salt concentrations;（2） dual-anion TFSI-_n-DFBOP-min the Li+solvation sheath facilitates facile Li+desolvation and formation of salt-rich clusters and is conducive to the formation of Li conductive segments of TPU-SN matrix;（3） theoretical calculations indicate that the decomposition products of LiDFBOP form SEI with lower binding energy with LiF in the SN system,thereby enhancing the interfacial electrochemical redox kinetics of SPE and creating a solid interface SEI layer rich in LiF.As a result,the optimized electrolyte exhibits an excellent ionic conductivity of9.31 × 10-4S cm-1at 30℃ and a broadened electrochemical stability up to 4.73 V.The designed electrolyte effectively prevents the formation of Li dendrites in Li symmetric cells for over 6500 h at0.1 mA cm-2.The specific Li-Si alloy-solid state half-cell capacity shows 711.6 mAh g-1after 60 cycles at 0.3 A g-1. Excellent rate performance and cycling stability are achieved for these solid-state batteries with Li-Si alloy anodes and NCM 811 cathodes.NCM 811‖ Prelithiated silicon-based anode solid-state cell delivers a discharge capacity of 195.55 mAh g-1and a capacity retention of 97.8% after 120 cycles.NCM 811‖Li solid-state cell also delivers capacity retention of 84.2% after 450 cycles.

关键词： Li-Si alloy anode Prelithiation SEI layer Solid-state electrolyte

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Dt1 inhibits SWEET-mediated sucrose transport to regulate photoperiod-dependent seed weight in soybean

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Molecular Plant 2024年第3期17卷 496-508页

作者： Xiaoming Li Zhonghui Chen Haiyang Li Lin Yue Cuirong Tan Hongjie liu Yilong Hu Yuhua Yang Xiani Yao Lingping Kong Xiang Huangi Bin Yu Chunyu Zhang yuefeng Guan Baohui liu Fanjiang Kong Xingliang Hou Guangdong Provincial Key Laboratory of Applied Botany&State Key Laboratory of Plant Diversity and Specialty Crops South China Botanical GardenChinese Academyof SciencesGuangzhou510650China Guangdong Provincial Key Laboratory of Plant Adaptation and Molecular Design Guangzhou Key Laboratory of Crop Gene EditingInnovative Center of Molecular Genetics and EvolutionSchool of Life SciencesGuangzhou UniversityGuangzhou 510006China University of Chinese Academy of Sciences Beijing 100049China College of Agronomy and Biotechnology China Agricultural UniversityBeijing 100193China

Soybean is a photoperiod-sensitive short-day crop whose reproductive period and yield are markedly affected by day-length changes.Seed weight is one of the key traits determining the soybean yield;how-ever,the prominent genes that control the final seed weight of soybean and the mechanisms underlying the photoperiod's effect on this trait remain poorly understood.In this study,we identify SwW19 as a major locus controlling soybean seed weight by QTL mapping and determine Dt1,an orthologous gene of Arabidopsis TFL1 that is known to govern the soybean growth habit,as the causal gene of the SW19 locus.We showed that Dt1 is highly expressed in developing seeds and regulates photoperiod-dependent seed weight in soybean.Further analyses revealed that the Dt1 protein physically interacts with the sucrose transporter GmSWEET10a to negatively regulate the import of sucrose from seed coat to the embryo,thus modulating seed weight under long days.However,Dt1 does not function in seed development under short days due to its very low expression.Importantly,we discovered a novel natural allelic variant of Dt1(H4 haplotype)that decouples its pleiotropic effects on seed size and growth habit;i.e.,this variant remains functional in seed development but fails to regulate the stem growth habit of soybean.Collectively,our findings provide new insights into how soybean seed development responds to photoperiod at different latitudes,offering an ideal genetic component for improving soybean's yield by manipulating its seed weightandgrowth habit.

关键词： soybean seed weight photoperiod dt1 sucrose transport

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Cu-embedded porous Al_(2)O_(3) bifunctional catalyst derived from metal–organic framework for syngas-to-dimethyl ether

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Chinese Chemical Letters 2022年第6期33卷 2906-2910页

作者： Yongle Guo Lu Feng yuefeng liu Zhongkui Zhao State Key Laboratory of Fine Chemicals Department of Catalysis Chemistry and EngineeringSchool of Chemical EngineeringDalian University of TechnologyDalian 116024China Dalian National Laboratory for Clean Energy(DNL) Dalian Institute of Chemical PhysicsChinese Academy of ScienceDalian 116023China Zhang Dayu School of Chemistry Dalian University of TechnologyDalian 116024China

Dimethyl ether(DME),as a promising alternative to diesel fuel and liquefied petroleum gas,has attracted considerable attention in catalysis domain.The catalytic direct synthesis of DME from syngas is an upand-coming route but remains a challenge.In this work,we firstly prepared a Cu-embedded porous Al_(2)O_(3)bifunctional catalyst(Cu@Al_(2)O_(3)-dp)by filling Cu-1,3,5-benzenetricarboxylate metal–organic framework(Cu-BTC MOF)with Al(OH)_(3) followed by a two-step calcination process(400℃for 4 h and 600℃for1 h),exhibiting excellent catalytic performance for direct synthesis of DME from syngas.Cu@Al_(2)O_(3)-dp catalyst demonstrates much higher CO conversion(25.7%vs.15.4%)and extremely higher DME selectivity(90.4%vs.63.9%)with the increased catalytic stability compared to the supported Cu catalyst on MOF-derived porous Al_(2)O_(3)(Cu/Al_(2)O_(3))prepared by incipient wetness impregnation method,ascribed to the unique embedding-type structure,promoted Cu dispersion and stronger metal-support interaction.This work not only provides an efficient syngas-to-DME catalyst,but also paves a new way for designing highly-efficient core-shell bifunctional catalysts for diverse consecutive reactions.

关键词： Dimethyl ether CO hydrogenation Bifunctional catalyst Embedding-type structure Metal–organic framework

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Doped all-inorganic cesium zirconium halide perovskites with high-efficiency and tunable emission

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Journal of Energy Chemistry 2022年第2期31卷 600-604页

作者： Pengfei Cheng Daoyuan Zheng Lu Feng yuefeng liu Junxue liu Juntao Li Yang Yang Guoxiong Wang Keli Han State Key Laboratory of Molecular Reaction Dynamics Dalian Institute of Chemical PhysicsChinese Academy of ScienceDalian 116023LiaoningChina Institute of Molecular Sciences and Engineering Shandong UniversityQingdao 266000ShandongChina Dalian National Laboratory for Clean Energy(DNL) Dalian Institute of Chemical PhysicsChinese Academy of ScienceDalian 116023LiaoningChina Key Laboratory of Chemical Lasers Dalian Institute of Chemical PhysicsChinese Academy of ScienceDalian 116023LiaoningChina University of Chinese Academy of Sciences Beijing 100049China

Doping enables manipulation of both the electrical and optical properties of halide perovskites.Herein,we incorporated Te^(4+) into Cs_(2)ZrCl_(6) single crystal,simultaneously preserving the vacancy-ordered structure,to obtain an efficient yellow-emitting perovskite with a near-unity photoluminescence quantum yield(PLQY≈97.6%).Te^(4+) doping modifies the hue and emission color of pristine Cs_(2)ZrCl_(6),generates new absorption channels,and successfully extends the excitation energy from<280 nm to 360-450 nm range.Detailed spectral characterizations,including ultrafast femtosecond transient absorption measurements,reveal that the bright yellow light is derived from triplet self-trapped excitons.Moreover,further tuning doping concentration enables Te-doped Cs_(2)ZrCl_(6) single crystals to exhibit efficient warm white light emission.This work provides a new perspective for the development and design of stable lead-free perovskites with highly efficient luminescence.

关键词： Zirconium halide perovskite Doping Excitation energy Photoluminescence Energy transfer

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CuSx-mediated two reaction systems enable biomimetic photocatalysis in CO_(2) reduction with visible light

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Journal of Energy Chemistry 2022年第2期31卷 497-504页

作者： Ling-Xiang Wang Zhi-Qiang Wang Liang Wang Zhiyuan Yang Qiuyan Zhu Yifeng liu Wei Fang Xue-Qing Gong yuefeng liu Xiaolong liu Feng-Shou Xiao Key Laboratory of Applied Chemistry of Zhejiang Province Department of ChemistryZhejiang UniversityHangzhou 310028ZhejiangChina Key Lab of Biomass Chemical Engineering of Ministry of Education College of Chemical and Biological EngineeringZhejiang UniversityHangzhou 310027ZhejiangChina Key Laboratory for Advanced Materials and Joint International Research Laboratory for Precision Chemistry and Molecular Engineering Feringa Nobel Prize Scientist Joint Research CenterCentre for Computational Chemistry and Research Institute of Industrial CatalysisSchool of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai 200237China Dalian National Laboratory for Clean Energy(DNL) Dalian Institute of Chemical Physics(DICP)Chinese Academy of ScienceDalian 116023LiaoningChina State Key Laboratory of Optoelectronic Materials and Technologies School of MaterialsSun Yat-Sen UniversityGuangzhou 510275GuangdongChina

The performances of heterogeneous catalysts can be effectively improved by optimizing the catalysts via appropriate structure design.Herein,we show that the catalysis of cuprous sulfide can be boosted by constructing the hybrid structure with Cu_(2)S nanoparticles on amorphous CuSx matrix(Cu_(2)S/CuSx).In the photocatalytic CO_(2) reduction under visible light irradiation,the Cu_(2)S/CuSx exhibited a CO production rate at 4.0μmol h-1 that is 12-fold higher than that of the general Cu_(2)S catalyst.Further characterizations reveal that the Cu_(2)S/CuSx has two reaction systems that realize the biomimetic catalysis,involving in the light reaction on the Cu_(2)S nanoparticle-CuSx matrix heterojunctions for proton/electron production,and the dark reaction on the defect-rich CuSx for CO_(2) reduction.The CuSx matrix could efficiently activate CO_(2) and stabilize the split hydrogen species to hinder undesired hydrogen evolution reaction,which benefits the proton-electron transfer to reduce CO_(2),a key step for bridging the two reaction systems.

关键词： CO_(2) Photoreduction Bifunctional catalyst Proton-coupled electron transfer

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Two-dimensional launch window method to search for launch opportunities of interplanetary missions

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Chinese Journal of Aeronautics 2020年第3期33卷 965-977页

作者： Junhong DUAN yuefeng liu Air and Missile Defense College Air Force Engineering UniversityXi’an 710051China Science and Technology on Electro-optic Control Laboratory Luoyang 471000China

Accurate and highly efficient approaches to obtain mission opportunities are still the goals of mission planners of interplanetary explorations.The search for launch opportunities not only determines the specified launch window of the mission but also presents the performance requirements for the interplanetary probe and its launch vehicle.An effective method, namely the two-dimensional launch window method, is developed from a completely new perspective to determine all the launch opportunities of the mission in this research.For a fixed launch time,the method to determine all the time windows in the dimension of Time-of-Flight(TOF) is firstly proposed and these time windows represent all the launch opportunities for the given launch time.And then, the two-dimensional launch window method is proposed, which computes the time windows in both the launch time and TOF dimensions to achieve all launch opportunities of the mission.Numerical examples are provided to demonstrate the accuracy and high efficiency of the method.Compared with the widely-used pock-chop plot method, the proposed method reduces the computational time by two orders of magnitude for the same search precision, and thus is especially suitable for the cases involving rapid, high-precision, and/or large-scale searches for mission opportunities.

关键词： Interplanetary mission Launch opportunity Pock-chop plot Rendezvous Time-of-flight

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Increased Risk of Neonatal Pneumonia in Pregnant Women with Atypical Pre-Labor Rupture of Membrane Assessed at Pregnancy Week 39

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Open Journal of Obstetrics and Gynecology 2024年第4期14卷 528-534页

作者： Li Fu Haiyan Pei yuefeng Wang Dan Zhang Xiaodan liu Huaizhong Hu Xinghui liu Department of Gynecology Pengzhou People&#8217s Hospital Chengdu China Department of Ultrasound Examination Pengzhou People&#8217s Hospital Chengdu China Origissay Diagnostics Ltd. Chengdu China Department of Obstetrics and Gynecology Key Laboratory of Birth Defects and Related Diseases of Women and Children Sichuan University Chengdu China Ministry of Education West China Second University Hospital of Sichuan University Chengdu China

Purpose: Neonatal pneumonia is a major newborn disease with a high morbidity rate. We aimed to evaluate whether atypical prelabor rupture of membranes (PROM) is a high-risk factor for causing neonatal pneumonia in a prospective real-world study. Patients and Methods: A total of 250 pregnant women at pregnancy week 39 were non-selectively recruited. All were examined by PROM and neonatal pneumonia related clinical, bedside and lab tests, including body temperature, blood pressure, increased vagina discharge, posterior vault pooling, abdominal tenderness, WBC count, nitrazine test, amniotic fluid index, Leakection (a sICAM-1 based lateral flow immunoassay) and vagina streptococcus examinations. Increased vagina discharge with a Leakection positivity was adopted as a working criterium for identifying atypical PROM. Neonatal pneumonia was diagnosed based on the clinical presentation and lab tests. Results: Twenty cases of neonatal pneumonia (8.0%) were diagnosed after the deliveries of the 250 pregnant women. In these neonatal pneumonia cases, 12 (16.7%) occurred in 72 deliveries with atypical PROM, 2 (16.7%) in 12 deliveries with typical PROM, and 6 (3.6%) in 166 deliveries with non-PROM. Conclusion: In this real-world study, we find that a systematic screening at pregnancy week 39 was very meaningful in revealing atypical PROM. Moreover, atypical PROM is a major risk factor for neonatal pneumonia. Therefore, an early diagnosis and intervention on atypical PROM could potentially reduce the occurrence of neonatal pneumonia.

关键词： Atypical Prelabor Rupture of Membranes Neonatal Pneumonia Soluble Intercellular Adhesion Molecule-1

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Efficient Electronic Modulation of g-C_(3)N_(4)Photocatalyst by Implanting Atomically Dispersed Ag_(1)-N_(3)for Extremely High Hydrogen Evolution Rates

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CCS Chemistry 2022年第8期4卷 2793-2805页

作者： Guanchao Wang Ting Zhang Weiwei Yu Zhe Sun Xiaowa Nie Rui Si yuefeng liu Zhongkui Zhao State Key Laboratory of Fine Chemicals Department of Catalysis Chemistry and EngineeringSchool of Chemical EngineeringDalian University of TechnologyDalian 116024 Shanghai Synchrotron Radiation Facility Shanghai Institute of Applied PhysicsChinese Academy of SciencesShanghai 201204 Dalian National Laboratory for Clean Energy(DNL) Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023

Developing an efficientmethod to improve the photocatalytic efficiency of graphitic carbon nitride(g-C3 N4)is of great significance for solar H2 production.Electronic structure modulation has been considered one of the most crucial strategies to improving the photocatalytic efficiency of g-C_(3)N_(4),but how to efficiently modulate its electronic structure remains a huge challenge.Herein,we,for the first time,report a facile and highly-efficient approach to modulating the electronic structure of g-C_(3)N_(4)through single Ag atom implantation with a Ag_(1)-N_(3)coordination configuration into the g-C_(3)N_(4)framework.

关键词： single-atomsilver graphitic carbon nitride electronic structure modulation hydrogen evolution photocatalysis

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