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Flower-like CuS/γ-Fe_(2)O_(3) van der Waals heterostructures with highefficient electromagnetic wave absorption

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Nano Research 2024年第4期17卷 3324-3333页

作者： Na Lu Jingshen Xu mengwei Yuan Genban sun Beijing Key Laboratory of Energy Conversion and Storage Materials Institution College of ChemistryBeijing Normal UniversityBeijing 100875China Center for Advanced Materials Research Beijing Normal UniversityZhuhai 519087China

The escalating electromagnetic(EM)pollution issues and the demand to elevate military stealth technology make it imperative to develop cost-effective and high-performance electromagnetic wave(EMW)absorbing materials.In this paper,the flower-like CuS/γ-Fe_(2)O_(3) van der Waals(vdW)heterostructures have been synthesized via a facile two-step solvothermal approach.The flower-like CuS skeleton increases the attenuation path of EMW while reducing the material density.Different contents ofγ-Fe_(2)O_(3) nanoparticles anchor between the flower-like CuS nanosheets to constitute a heterogeneous structure,which enables dielectric and magnetic loss synergistically to optimize impedance matching and remarkably improve the EMW absorption performance.The minimum reflection loss(RLmin)is-49.36 dB with a thickness of only 1.6 mm and the effective absorption bandwidth(EAB)reaches 4.64 GHz(13.36–18 GHz).By adjusting the thickness of the absorber,the EAB can cover 96%of the GHz band.Notably,the superior absorption of-61.53 dB at middle frequency band can be obtained by adjusting the amount of Fe_(2)O_(3) addition.In this study,the adjustment of EM parameters and the optimization of impedance matching have been achieved by constructing a novel vdW heterogeneous structure,which provides fresh ideas and references for the design of high-performance EMW absorbing materials.

关键词： flower-like CuS γ-Fe_(2)O_(3) van der Waals heterostructures impedance matching electromagnetic wave absorption

Coupling interface constructions of hollow Co-Mo mixed multiple oxidation states heterostructure for high-performance aprotic Li-O_(2) battery

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Nano Research 2024年第5期17卷 4100-4107页

作者： Xingzi Zheng mengwei Yuan Jingshen Xu Zihan Li Caiyun Nan Genban sun Beijing Key Laboratory of Energy Conversion and Storage Materials College of ChemistryBeijing Normal UniversityBeijing 100875China Center for Advanced Materials Research Beijing Normal UniversityZhuhai 519087China

Constructing interfaces in heterostructures is effective for modulating the electronic properties of electrocatalysts.The hollow CoMoO_(4)-Co_(3)O_(4) heterostructure(HCMCH)was prepared as a bifunctional electrocatalyst for Li-O_(2) battery.The different components in CoMoO_(4)-Co_(3)O_(4) heterostructure presented the efficient coupling and enhanced the electrocatalytic activity for aprotic oxygen reduction reaction(ORR)and oxygen evolution reaction(OER),in which it improved the obviously reduced overpotential of 300 mV(compared with the pure Ketjen black(KB)electrode),enhanced reversibility of 80%capacity retention after 6 full cycles and the superior cyclability of more than 200 cycles with an optimized strategy.The battery performance of the HCMCH was not only associated with the unique hollow structure and rich active sites but also with coupling interface constructions synergetic effects attaching to the improving conductivity and optimized the discharge conversion.These results suggested that this HCMCH electrocatalyst was a promising candidate for the Li-O_(2) battery and it gave a novel insight for high performance electrocatalyst designing.

关键词： Li-oxygen battery heterostructure electrocatalyst coupling interface

Fixed-Time Cooperative Tracking for Delayed Disturbed Multi-Agent Systems Under Dynamic Event-Triggered Control

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IEEE/CAA Journal of Automatica Sinica 2022年第5期9卷 930-933页

作者： Jian Liu Yongbao Wu mengwei sun Changyin sun School of Automation Southeast UniversityNanjing 210096 Key Laboratory of Measurement and Control of Complex System of Engineering Ministry of EducationSoutheast UniversityNanjing 210096China Institutes of Physical Science and Information Technology Anhui UniversityHefei 230601China IEEE

Dear editor,Recently,researchers have obtained many new results about the multi-agent systems(MASs)[1]-[3].In[1],the fixed-time cooperative control(FTCC)algorithm of linear MASs with matched disturbances was proposed.The nonholonomic chained-form dynamics case was considered in[2].In[3],the output tracking problem with data packet dropout was solved for high-order MASs.Moreover,delay frequently occurs because of the non-ideal data transmission[4],and the corresponding FTCC algorithm of MASs with delay was given in[5].

关键词： editor Dynamic Trigger Event

Description of a new species in the genus Nephrotoma(Diptera:Tipuloidea:Tipulidae)from China,with redescriptions of hypopygiums of six species

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动物分类学报:英文版 2023年第3期48卷 249-263页

作者： Qiulei Men Dong Yu mengwei sun School of Life Sciences the Belt and Road Model International Science and Technology Cooperation Base for Biodiversity Conservation and Utilization in Basins of Anhui ProvinceProvincial Key Laboratory of the Biodiversity Study and Ecology Conservation in Southwest Anhui ProvinceAnqing Normal UniversityAnqingAnhui 246011P.R.China Library of Anqing Normal University Anqing Normal UniversityAnqingAnhui 246011China

A species of the genus Nephrotoma from Xizang,China is described as new to science,namely N.zhuolonggouensis Men,sp.nov.,which differs from its relative species by the structures of outer gonostylus,median lobe of sternite eighth and gonapophyses.Hypopygiums of another six species,N.concava Yang&Yang,1990,N.geniculata Yang&Yang,1987,N.hirsuticauda Alexander,1924,N.martynovi Alexander,1935,N.nigrostylata Alexander,1935 and N.virgata(Coquillett,1898),are redescribed based on additional characters.

关键词： Taxonomy crane flies Xizang semen pump gonapophyses

Assembling ionic liquid into porous molecular filler of mixed matrix membrane to trigger high gas permeability,selectivity,and stability for CO_(2)/CH_(4) separation

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Nano Research 2024年第5期17卷 4535-4543页

作者： Liting Yu Liqin Hao Yang Feng Jia Pang mengwei Guo Liangjun Li Weidong Fan Lili Fan Rongming Wang Zixi Kang Daofeng sun School of Materials Science and Engineering State Key Laboratory of Heavy Oil ProcessingChina University of Petroleum(East China)Qingdao 266580China College of Chemistry Nankai UniversityTianjin 300071China College of Chemistry and Chemical Engineering China University of Petroleum(East China)Qingdao 266580China College of New Energy China University of Petroleum(East China)Qingdao 266580China

As an emerging zero-dimensional nano crystalline porous material,porous organic cages(POCs)with soluble properties in organic solvents,are promising candidates as molecular fillers in mixed matrix membranes(MMMs).The pore structure of POCs should be adjusted to trigger efficient gas separation performance,and the interaction between filler and matrix should be optimized.In this work,ionic liquid(IL)was introduced into the molecular fillers of CC3,to construct the IL@CC3/PIM-1 membrane to effectively separate CO_(2) from CH_(4).The advantages of doping IL include:(1)narrowing the cavity size of POCs from 4.4 to 3.9Åto enhance the diffusion selectivity,(2)strengthening the CO_(2) solubility to heighten the gas permeability,and(3)improving the compatibility between filler and matrix to upgrade membrane stability.After the optimization of the membrane composite,the IL@CC3/PIM-1-10%membrane possesses the CO_(2) permeability of 7868 Barrer and the CO_(2)/CH_(4) selectivity of 73.4,which compared to the CC3/PIM-1-10%membrane,improved by 15.9%and 106.2%,respectively.Furthermore,the membrane has maintained a stable separation performance at varied temperatures and pressures during the long-term test.The proposed method offers an efficient way to improve the performance of POCs-based MMMs in gas separation.

关键词： porous organic cage mixed matrix membrane ionic liquid gas separation

High-throughput screening of novel TFEB agonists in protecting against acetaminopheninduced liver injury in mice

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Acta Pharmaceutica Sinica B 2024年第1期14卷 190-206页

作者： Xiaojuan Chao mengwei Niu Shaogui Wang Xiaowen Ma Xiao Yang Hua sun Xujia Hu Hua Wang Li Zhang Ruili Huang Menghang Xia Andrea Ballabio Hartmut Jaeschke Hong-Min Ni Wen-Xing Ding Department of Pharmacology Toxicology and TherapeuticsUniversity of Kansas Medical CenterKansas CityKS 66160USA NMPA Key Laboratory for Research and Evaluation of Drug Metabolism&Guangdong Provincial Key Laboratory of New Drug Screening School of Pharmaceutical SciencesSouthern Medical UniversityGuangzhou 510515China Department of Oncology the First Affiliated Hospital of Anhui Medical UniversityAnhui Medical UniversityHefei 230032China National Center for Advancing Translational Sciences National Institutes of HealthBethesdaMD 20892USA Telethon Institute of Genetics and Medicine TIGEMPozzuoliNaples 80131Italy Medical Genetics Department of Translational MedicineFederico II UniversityNaples 80131Italy Department of Molecular and Human Genetics Baylor College of MedicineHoustonTX 77030USA Department of Internal Medicine Division of GastroenterologyHepatology&MotilityUniversity of Kansas Medical CenterKansas CityKS 66160USA

Macroautophagy(referred to as autophagy hereafter)is a major intracellular lysosomal degradation pathway that is responsible for the degradation of misfolded/damaged proteins and organelles.Previous studies showed that autophagy protects against acetaminophen(APAP)-induced injury(AILI)via selective removal of damaged mitochondria and APAP protein adducts.The lysosome is a critical organelle sitting at the end stage of autophagy for autophagic degradation via fusion with autophagosomes.In the present study,we showed that transcription factor EB(TFEB),a master transcription factor for lysosomal biogenesis,was impaired by APAP resulting in decreased lysosomal biogenesis in mouse livers.Genetic loss-of and gain-of function of hepatic TFEB exacerbated or protected against AILI,respectively.Mechanistically,overexpression of TFEB increased clearance of APAP protein adducts and mitochondria biogenesis as well as SQSTM1/p62-dependent non-canonical nuclear factor erythroid 2-related factor 2(NRF2)activation to protect against AILI.We also performed an unbiased cell-based imaging high-throughput chemical screening on TFEB and identified a group of TFEB agonists.Among these agonists,salinomycin,an anticoccidial and antibacterial agent,activated TFEB and protected against AILI in mice.In conclusion,genetic and pharmacological activating TFEB may be a promising approach for protecting against AILI.

关键词： Autophagy DILI Drug screening Hepatotoxicity Lysosome Mitochondria Mitophagy NRF2

植物甾醇对O/W型纳米乳液物化稳定性及消化特性的影响

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中国食品学报 2024年第4期24卷 130-140页

作者：胡梦伟宋萧萧代志凯孙海辉殷军艺聂少平南昌大学、食品科学与资源挖掘全国重点实验室、中国-加拿大食品科学与技术联合实验室(南昌)、江西省生物活性多糖重点实验室南昌330047 宜春大海龟生命科学股份有限公司江西宜春336000

植物甾醇(PS)具有不溶于水,难溶于油的特性,构建水包油(O/W)型纳米乳液是目前提升其生物利用度、感官品质的常见方法,然而其乳化作用对O/W型纳米乳液的稳定机制尚未得到关注。本研究构建了荷载不同质量分数的植物甾醇(0.1%,0.5%,0.9%)... 详细信息

植物甾醇(PS)具有不溶于水,难溶于油的特性,构建水包油(O/W)型纳米乳液是目前提升其生物利用度、感官品质的常见方法,然而其乳化作用对O/W型纳米乳液的稳定机制尚未得到关注。本研究构建了荷载不同质量分数的植物甾醇(0.1%,0.5%,0.9%)的纳米乳液(PSN),系统探究了PS浓度对油-水界面张力,以及乳液的微观结构、粒径、ζ-电位、储藏稳定性、氧化稳定性以及消化特性的影响。结果表明:PS可降低油-水界面张力,并可在界面处形成部分结晶,影响PSN的物化稳定性;制得的PSN粒径为165.3~247.2 nm,ζ-电位范围为-24.3~-28.4 mV,随着PS浓度的增加逐渐增大;4℃储存28 d,0.1%PSN及0.5%PSN均可保持良好的稳定性,然而在60℃储存条件下,0.9%PSN表现出最优的动力学稳定性。此外,加速氧化试验及消化试验的结果均显示,较高浓度的PS可有效抑制乳液中的脂质氧化以及游离脂肪酸的释放(<31.41%)。本研究结果可为PS功能性食品或辅料的精准开发提供较好的理论参考。

关键词：植物甾醇纳米乳液稳定性界面张力体外消化

Comparative morphological study of reproductive system between Tipulidae and Limoniidae(Diptera： Tipuloidea)

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Zoological Systematics 2018年第1期43卷 89-102页

作者： Qiulei Men mengwei sun Pavel Starkevich School of Life Sciences Province Key Laboratory of the Biodiversity Study and Ecology Conservation in Southwest Anhui ProvinceResearch Center of Aquatic Organism Conservation and Water Ecosystem Restoration in Anhui Province Anqing Normal UniversityAnqing Anhui 246011 PR. China Library Anqing Normal University Anqing Anhui 246011 P.R. China Nature Research Centre Akademijos 2 LT-08412 Vilnius Lithuania

In present paper, the morphological descriptions of reproductive systems for Libnotes（Libnotes） pseudonohirai Men, 2015 in both sexes are provided, which represents the first description of the internal reproductive system in this genus. The female internal reproductive system of Libnotes（Libnotes） pseudonohirai is compared with that of the two presently examined species, Hexatoma（Eriocera） cleopatroides Men, 2015 and Holorusia sp., as well as some species previously documented. The morphological differences of internal reproductive organs for these species are listed. Additionally, the characteristic modes of internal reproductive systems for Tipulidae and Limoniidae are compared and summarized.

关键词： Nematocera crane fly spermatheca vas deferens morphological comparison

Rational design of hollow rice-grainedα-Fe_(2)O_(3)/carbon nanofibers with optimized impedance matching for electromagnetic wave absorption enhanced

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Nano Research 2023年第4期16卷 5676-5684页

作者： Jingshen Xu Na Lu mengwei Yuan Genban sun Beijing Key Laboratory of Energy Conversion and Storage Materials College of ChemistryBeijing Normal UniversityBeijing 100875China Center for Advanced Materials Research Beijing Normal UniversityZhuhai 519087China

Electromagnetic wave absorption materials are widely used in electronic equipment and military fields.However,high cost and complex preparation processes become a major obstacle in promoting popularization in the civil field.To solve the problems above,researchers have made great efforts to develop Fe-based carbon composites.However,most of the typical composites require a high filling ratio while achieving excellent properties.Therefore,in this study,carbon nanofibers(CNFs)combined with the hollow rice-grainedα-Fe_(2)O_(3)nanoparticles were prepared by the in-situ transformation method.The rational microstructure design provided a solution for reducing the filling ratio,optimizing impedance matching,and improving electromagnetic wave absorption performance.The strong reflection loss value(−38.1 dB)and broad effective absorption bandwidth(4.6 GHz)for Fe_(2)O_(3)/CNFs composites were achieved with a low filling ratio(20 wt.%),and the analysis of electromagnetic parameters validated that the microstructure of Fe_(2)O_(3)/CNFs plays a crucial role in the performance improvement.With the optimized impedance matching and simple preparation method,Fe_(2)O_(3)/CNFs have broad application prospects in electromagnetic wave absorption.

关键词： electromagnetic wave absorption Fe-based carbon nanofibers impedance matching