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Hyper-crosslinked Conjugated Microporous Polymers with Increased Micropores Promotes Confining Polymerization for Electromagnetic Absorption Application

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Chinese Journal of Polymer Science 2023年第8期41卷 1305-1316,I0011页

作者： Hao Chen Fang-Yuan Chu Hai-Yan zhuang Lu Wang Zhi-Min ye Wei Dong Zhi-Peng Xie A-Ming Xie School of Mechanical Engineering Nanjing University of Science&TechnologyNanjing 210094China State Key Laboratory for Marine Corrosion and Protection Luoyang Ship Material Research Institute(LSMRI)Xiamen 361100China School of Chemistry and Chemical Engineering Nanjing University of Science&TechnologyNanjing 210094China

Conjugated microporous polymers have excellent skeleton structures but poor electrical conductivity limits their applications in microwave *** solve this problem,a strategy of molecular expansion and confining polymerization is proposed in this work to synthesize conductive hyper-crosslinked conjugated microporous *** topology of the conjugated microporous polymer is changed into a three-dimensional skeleton structure with high specific surface area by using molecular expansion technique,and the controlled growth of polypyrrole in the channel constructs a unique network *** balance of excellent composite backbone structure,proper conductivity,attenuation capability and impedance matching enable the material to exhibit electromagnetic wave absorption *** a result,with low filler loading of 10 wt%,a strongest reflection loss of-52.68 d B and a maximum effective bandwidth of 5.76 ***,CST simulations of the radar scattering cross section have been carried out to verify the excellent material *** study provides new concepts for new conductive polymers and broadens the application of hyper-crosslinked conjugated microporous polymer in the field of electromagnetic wave absorption.

关键词： Hyper-crosslinked conjugated microporous polymer Electromagnetic wave absorbing Molecular expansion Polypyrrole

Prestoring lithium into SnO_(2)coated 3D carbon fiber cloth framework as dendrite-free lithium metal anode

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Particuology 2024年第1期84卷 89-97页

作者： Tao Wei Yanyan Zhou Cheng Sun Lesheng Liu Sijia Wang Mengting Wang ye Liu Qing Huang Quanchao zhuang Yongfu Tang School of Energy and Power Jiangsu University of Science and TechnologyZhenjiang212003China College of Materials Science and Engineering Nanjing Forestry UniversityNanjing210037China Li-ion Batteries Lab School of Materials Science and EngineeringChina University of Mining and TechnologyXuzhouChina Hebei Key Laboratory of Applied Chemistry School of Environmental and Chemical EngineeringYanshan UniversityQinhuangdao066004China

For several decades,the promise of implementing of lithium(Li)metal anodes has been regarded as the"holy grail"for Li-based ***,we have proposed a facile design of a carbon fiber cloth(CFC)framework coated with SnO_(2)nanoparticles through a hydrothermal process,which served as a reliable host for prestoring molten Li to produce a CFC@SnO_(2)@Li composite ***,TEM,HRTEM,XPS and different electrochemical characterizations were carried *** to the synergetic effects of the 3D conductive CFC and the coated lithiophilic SnO_(2)nanoparticles,the designed CFC@SnO_(2)@Li electrodes can buffer the volume changes and reduce the local current density,thus suppress the Li dendrites during ***,the CFC@SnO_(2)electrodes showed a high and stable CE of 98.6%for 1000 cycles at a current density of 1 mA cm^(-2)(1 mAh cm^(-2)).What is more,at a high current density of 5 mA cm^(-2)and a high areal capacity of 5 mAh cm^(-2),the symmetric cell displayed relatively low overpotential and long cycling lifetime of 1600 *** results confirm its great potential as lithium metal anodes in practical battery applications.

关键词： Lithiophilic Lithium metal anodes SnO_(2) 3D anode Dendrite-free

Structural and electronic properties of transition-metal chalcogenides Mo5S4 nanowires

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Chinese Physics B 2019年第10期28卷 204-209页

作者： Ming-Shuai Qiu huai-Hong Guo ye Zhang Bao-Juan Dong Sajjad Ali Teng Yang College of Sciences Liaoning Shihua UniversityFushun 113001China Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China

Transition-metal chalcogenide nanowires(TMCN) as a viable candidate for nanoscale applications have been attracting much attention for the last few decades. Starting from the rigid building block of M6 octahedra(M = transition metal),depending on the way of connection between M6 and decoration by chalcogenide atoms, multiple types of extended TMCN nanowires can be constructed based on some basic rules of backbone construction proposed here. Note that the well-known Chevrel-phase based M6X6 and M6X9(X = chalcogenide atom) nanowires, which are among our proposed structures, have been successfully synthesized by experiment and well studied. More interestingly, based on the construction principles, we predict three new structural phases(the cap, edge, and C&E phases) of Mo5S4, one of which(the edge phase) has been obtained by top-down electron beam lithography on two-dimensional MoS2, and the C&E phase is yet to be synthesized but appears more stable than the edge phase. The stability of the new phases of Mo5S4 is further substantiated by crystal orbital overlapping population(COOP), phonon dispersion relation, and thermodynamic calculation. The barrier of the structural transition between different phases of Mo5S4 shows that it is very likely to realize an conversion from the experimentally achieved structure to the most stable C&E phase. The calculated electronic structure shows an interesting band nesting between valence and conduction bands of the C&E Mo5S4 phase, suggesting that such a nanowire structure can be well suitable for optoelectronic sensor applications.

关键词： transition-metal chalcogenide nanowire

Ultrafast and Broadband Terahertz Switching Based on Photo-Induced Phase Transition in Vanadium Dioxide Films

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Chinese Physics Letters 2013年第1期30卷 150-153页

作者： CHEN Zhi WEN Qi-ye DONG Kai SUN Dan-Dan QIU Dong-Hong ZHANG huai-Wu National Key Laboratory of Science and Technology of Communication University of Electronic Science and Technology of ChinaChengdu 610054 State Key Laboratory of Electronic Thin films and Integrated Devices University of Electronic Science&Technology of ChinaChengdu 610054

Single-phase VO_(2) thin films are sputtering deposited on BK7 substrates,and sharp insulator-to-metal phase transition is obtained with a resistivity change of four orders of ***(THz)pump-probe measurements reveal that by illuminating the films with a low pumping power of 143μJ/cm^(2),VO_(2) films exhibit an ultrafast optical switching to THz transmission within 8 ***,the THz switching ratio reaches over 80%in a wide frequency range from 0.3 to 2.5 *** these outstanding features indicate a strong potential of VO_(2) films for broadband terahertz wave switching and modulation applications.

关键词： pumping pump Switching

Spatiotemporal variations in the growth status of declining wild apple trees in a narrow valley in the western Tianshan Mountains, China

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Journal of Arid Land 2022年第12期14卷 1413-1439页

作者： QIU Dong TAO ye ZHOU Xiaobing Bagila MAISUPOVA YAN Jingming LIU Huiliang LI Wenjun zhuang Weiwei ZHANG Yuanming Xinjiang Key Laboratory of Special Species Conservation and Regulatory Biology/Key Laboratory of Special Environment Biodiversity Application and Regulation in Xinjiang/Key Laboratory of Plant Stress Biology in Arid Land/College of Life Sciences Xinjiang Normal UniversityUrumqi 830054China State Key Laboratory of Desert and Oasis Ecology Xinjiang Institute of Ecology and GeographyChinese Academy of SciencesUrumqi 830011China Kazakh Scientific Research Institute of Forestry and Agroforestry Astana 010000Kazakhstan

Malus sieversii(wild apple tree),only distributed in the Tianshan Mountains in Central Asia,is a tertiary relic species and an ancestral species of cultivated ***,existing natural populations of wild apple trees have been *** date,spatiotemporal variations in the growth status of declining wild apple trees and influencing factors in the narrow valley areas in the Tianshan Mountains remain *** this study,field investigation and sampling were carried out in three years(2016-2018)at four elevations(1300,1400,1500,and 1600 m)in the Qiaolakesai Valley(a typical longitudinal narrow valley in the Yili River Valley)of the western Tianshan Mountains in Xinyuan County,Xinjiang Uygur Autonomous Region,*** coverage,dead branch percentage,and 18 twig traits(these 20 parameters were collectively referred to as plant traits)were determined to comprehensively reflect the growth status of declining wild apple *** values of dead branch percentage ranged from 36%to 59%,with a mean of 40%.year generally showed higher impact on plant traits than *** 2017 and 2018,projective coverage,leaf size,leaf nitrogen concentration,and nitrogen to phosphorous ratio were markedly higher than those in ***,dead branch percentage and leaf and stem phosphorous concentrations showed the opposite *** of the topological parameters of plant trait networks differed in the three years,but the strength of trait-trait association increased year by *** mean difference between day and night temperatures(MDT),annual accumulative precipitation,soil electrical conductivity,and soil pH had the greatest impact on the plant trait *** growth status of declining wild apple trees was directly and positively affected by MDT and leaf *** conclusion,the growth of declining wild apple trees distributed in the narrow valley areas was more sensitive to interannual environmental changes than elevation *** results are of great significa

关键词： Malus sieversii plant attributes plant trait network elevation gradient meteorological factor western Tianshan Mountains

Uniformly grown PtCo-modified C03O4 nanosheets as a highly efficient catalyst for sodium borohydride electrooxidation

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Nano Research 2016年第11期9卷 3322-3333页

作者： Congying Song Dongming Zhang Bin Wang zhuang Cai Peng Yan Yang Sun Ke ye Dianxue Cao Kui Cheng Guiling Wang College of Materials Science and Chemical Engineering Harbin Engineering University Harbin 150001 China Research Center of Shanxi Province for High Gravity Chemical Engineering and Technology North University of China Taiyuan 030051 China

A facile hydrothermal synthetic method, followed by in situ reduction and galvanic replacement processes, is used to prepare PtCo-modified Co304 nanosheets （PtCo/C0304 NSs） supported on Ni foam. The prepared nanomaterial is used as an electrocatalyst for NaBH4 oxidation in alkaline solution. The morphology and phase composition of PtCo/C0304 NSs are characterized by scanning electron microscopy （SEM）, transmission electron microscopy （TEM）, X-ray diffraction （XRD）, and X-ray photoelectron spectroscopy （XPS）. The catalytic performance of PtCo/Co3O4 NSs is investigated by cyclic voltammetry （CV） and chronoamperometry （CA） in a standard three-electrode system. Current densities of 70 and 850 mA·cm^-2 were obtained at -0.4 V for Co/Co3O4 and PtCo/Co3O4 NSs, respectively, in a solution containing 2 mol·L^-1 NaOH and 0.2 mol·L^-1 NaBH4. The use of a noble metal （Pt） greatly enhances the catalytic activity of the transition metal （Co） and Co3O4. Besides, both Co and Co3O4 exhibit good B-H bond breaking ability （in NaBH4）, which leads to better electrocatalytic activity and stability of PtCo/Co3O4 NSs in NaBH4 electrooxidation compared to pure Pt. The results demonstrate that the as-prepared PtCo/Co3O4 NSs can be a promising electrocatalyst for borohydride oxidation.

关键词： PtCo/Co3O4 nanosheets in situ reduction galvanic replacement borohydride electrooxidation

Melatonin attenuates acute pancreatitis-associated lung injury in rats by modulating interleukin 22

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World Journal of Gastroenterology 2012年第36期18卷 5122-5128页

作者： Jia-Ping huai Xue-Cheng Sun Meng-Jun Chen Yin Jin Xiao-Hua ye Jian-Sheng Wu Zhi-Ming Huang Department of Gastroenterology First Affiliated Hospital of Wenzhou Medi- cal College Wenzhou 325000 Zhejiang Province China

AIM： To investigate whether therapeutic treatment with melatonin could protect rats against acute pan- creatitis and its associated lung injury. METHODS： Seventy-two male Sprague-Dawley rats were randomly divided into three groups： the sham op- eration （SO）, severe acute pancreatitis （SAP）, and mel- atonin treatment （MT） groups. Acute pancreatitis was induced by infusion of 1 mL/kg of sodium taurocholate （4% solution） into the biliopancreatic duct. Melatonin （50 mg/kg） was administered 30 min before pancre- atitis was induced, and the severity of pancreatic and pulmonary injuries was evaluated 1, 4 and 8 h after induction. Serum samples were collected to measure amylase activities, and lung tissues were removed to measure levels of mRNAs encoding interleukin 22 （IL-22） and T helper cell 22 （Th22）, as well as levels of *** IL-22 and Th22 were significantly higher （P 〈 0.001） in the MT group than in the SAP group （0.526 ± 0.143 vs 0.156 ± 0.027, respectively, here and throughout, after 1 h; 0.489 ± 0.150 vs 0.113 ± 0.014 after 4 h; 0.524 ± 0.168 vs 0.069 ± 0.013 after 8 h, 0.378 ± 0.134 vs 0.122 ± 0.015 after 1 h; 0.205 ± 0.041 vs 0.076 ± 0.019 after 4 h; 0.302 ± 0.108 vs 0.045 ± 0.013 after 8 h, respectively） and significantly lower （P 〈 0.001） in the SAP group than in the SO group （0.156 ± 0.027 vs 1.000 ± 0.010 after 1 h; 0.113 ± 0.014 vs 1.041 ± 0.235 after 4 h; 0.069 ± 0.013 vs 1.110 ± 0.213 after 8 h, 0.122 ± 0.015 vs 1.000 ± 0.188 after 1 h; 0.076 ± 0.019 vs 0.899 ± 0.125 after 4 h; 0.045 ± 0.013 vs 0.991 ± 0.222 after 8 h, respectively）. The mean pathologi- cal scores for pancreatic tissues in the MT group were significantly higher （P 〈 0.01） than those for samples in the SO group （1.088 ± 0.187 vs 0.488 ± 0.183 after 1 h, 2.450 ± 0.212 vs 0.469 ± 0.242 after 4 h; 4.994 ± 0.184 vs 0.513 ± 0.210 after 8 h）, but were significantly lower （P 〈 0.01） than those for samples in the SAP group at each time point （1.088 ± 0.187 vs 1.969 ± 0.290 after 1 h; 2.450 ±

关键词： Interleukin 22 Melatonin Pancreatitis-associated lung injury Severe acute pancreatitis Thelper 22 cell

Excavation at Hanjing site yields evidence of early rice cultivation in the huai River more than 8000 years ago

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Science China Earth Sciences 2022年第5期65卷 910-920页

作者： Zhenwei QIU Lina zhuang Huiyun RAO Liugen LIN Yijie zhuang National Museum of China Beijing 100006China Key Laboratory of Vertebrate Evolution and Human Origins Institute of Vertebrate Paleontology and PaleoanthropologyChinese Academy of SciencesBeijing 100044China CAS Center for Excellence in Life and Paleoenvironment Beijing 100044China School of Art and Archaeology of Zhejiang University Hangzhou 310028China Institute of Archaeology University College LondonLondon WC1H 0PYUK

Through the analysis of macro-and micro-plant remains,food residues and the rice-field like features from the mid-Neolithic site of Hanjing in the huai River region,we propose an early beginning of rice cultivation at *** presence of non-shattering rice spikelet bases and the increasing percentages of rice phytoliths confirm the appearance of domesticated rice in the Hanjing archaeobotanical ***,as indicated by the different prediction rates of rice domestication shown by morphometric of the double-peaked Oryza-type glum cells and fish-scale decorations on the Oryza-type bulliform cells from different cultural phases before 7,000 a BP,rice cultivation was at an early stage of *** findings provide new and significant evidence towards the establishment of the huai River as another important center for early rice cultivation and domestication in prehistoric China.

关键词： Rice field-like features Oryza-type bulliform Double-peaked Oryza-type Rice cultivation Rice domestication

Mapping of QTLs for Leaf Malondialdehyde Content Associated with Stress Tolerance in Rice

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Rice science 2009年第1期16卷 72-74页

作者： JIANG Jing zhuang Jie-yun FAN ye-yang SHEN Bo College of Life and Environmental Sciences Hangzhou Normal University Hangzhou 310012 China Chinese National Center for Rice Improvement/State Key Laboratory of Rice Biology China National Rice Research Institute Hangzhou 310006 China

Malondialdehyde （MDA） is the final product of lipid peroxidation, and MDA content can reflect the stress tolerance of plants. To map QTLs conditioning the MDA content in rice leaves, a recombinant inbred line （RIL） population with 247 lines derived from an indica-indica cross Zhenshan 97BxMilyang 46, and a linkage map consisting of 207 DNA markers were used. The RIL population showed a transgressive segregation in the MDA content of rice leaves. Two QTLs for the MDA content in rice leaves were detected in the intervals RG532-RG811 and RG381-RG236 on chromosome 1, with the additive effects from maternal and paternal parents, accounting for 4.33% and 4.62% of phenotype variations, respectively.

关键词： rice malondialdehyde content quantitative trait locus leaf stress tolerance