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Nanoconfinement effect of nanoporous carbon electrodes for ionic liquid-based aluminum metal anode

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Journal of Energy Chemistry 2022年第11期31卷 121-127,I0005页

作者： Juhee Yoon Seongbak moon Son ha Hyung-Kyu Lim Hyoung-Joon Jin Young Soo Yun Program in Environmental and Polymer Engineering Inha UniversityIncheon 22212South Korea Department of Polymer Science and Engineering Inha UniversityIncheon 22212South Korea KU-KIST Graduate School of Converging Science and Technology Korea UniversitySeoul 02841South Korea Division of Chemical Engineering and Bioengineering Kangwon National UniversityGangwon-do 24341South Korea Department of Integrative Energy Engineering Korea UniversitySeoul 02841South Korea

Rechargeable aluminum batteries(RABs),which use earth-abundant and high-volumetric-capacity metal anodes(8040 m Ah cm-3),have great potential as next-generation power sources because they use cheaper resources to deliver higher energies,compared to current lithium ion ***,the mechanism of charge delivery in the newly developed,ionic liquid-based electrolytic system for RABs differs from that in conventional organic ***,targeted research efforts are required to address the large overpotentials and cycling decay encountered in the ionic liquid-based electrolytic *** this study,a nanoporous carbon(NPC)electrode with well-developed nanopores is used to develop a high-performance aluminum *** negatively charged nanopores can provide quenched dynamics of electrolyte molecules in the aluminum deposition process,resulting in an increased collision *** fast chemical equilibrium of anionic species induced by the facilitated anionic collisions leads to more favorable reduction reactions that form aluminum *** nanoconfinement effect causes separated nucleation and growth of aluminum nanoparticles in the multiple confined nanopores,leading to higher coulombic efficiencies and more stable cycling performance compared with macroporous carbon black and 2D stainless steel electrodes.

关键词： Nanoconfinement effect Nanoporous carbon Ionic liquid electrolyte metal anode Aluminum batteries multivalent batteries

Inner Co Synergizing Outer Ru Supported on Carbon Nanotubes for Efficient pH-Universal Hydrogen Evolution Catalysis

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Nano-micro Letters 2022年第11期14卷 275-289页

作者： Jian Chen Yuan ha Ruirui Wang Yanxia Liu Hongbin Xu Bin Shang Renbing Wu Hongge Pan Institute of Science and Technology for New Energy Xi’an Technological UniversityXi’an 710021People’s Republic of China School of Advanced materials and Nanotechnology Xidian UniversityXi’an 710126People’s Republic of China Department of materials Science Fudan UniversityShanghai 200433People’s Republic of China State Key Laboratory of New Textile materials and Advanced Processing Technologies Wuhan Textile UniversityWuhan 430073People’s Republic of China State Key Laboratory of Silicon materials and School of materials Science and Engineering Zhejiang UniversityHangzhou 310027People’s Republic of China

Exploring highly active but inexpensive electrocatalysts for the hydrogen evolution reaction(HER)is of critical importance for hydrogen production from electrochemical water ***,we report a multicomponent catalyst with exceptional activity and durability for HER,in which cobalt nanoparticles were in-situ confined inside bamboo-like carbon nanotubes(CNTs)while ultralow ruthenium loading(~2.6μg per electrode area~cm^(−2))is uniformly deposited on their exterior walls(Co@CNTsǀRu).The atomic-scale structural investigations and theoretical calculations indicate that the confined inner Co and loaded outer Ru would induce charge redistribution and a synergistic electron coupling,not only optimizing the adsorption energy of H intermediates(ΔGH*)but also facilitating the electron/mass *** as-developed Co@CNTsǀRu composite catalyst requires overpotentials of only 10,32,and 63 mV to afford a current density of 10 mA cm^(−2) in alkaline,acidic and neutral media,respectively,representing top-level catalytic activity among all reported HER *** current work may open a new insight into the rational design of carbon-supported metal catalysts for practical applications.

关键词： Cobalt nanoparticles Carbon nanotubes Ru nanoclusters Hydrogen evolution reaction

可再生高强度纤维素基包装材料制备及其智能化应用

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中国造纸 2024年第7期43卷 149-159页

作者：王笑刘哈王月莹赵玉李新才王宝斌杨桂花陈嘉川齐鲁工业大学(山东省科学院)生物基材料与绿色造纸国家重点实验室山东济南250353

本研究提出了一种高强度可降解纤维素基复合打包带替代传统聚乙烯打包带的可靠策略,采用离子液体溶解制备再生纤维素材料,探讨了石墨烯对其导电性和机械性能的影响,从而制备高强度新型可再生复合打包带,并初步探索了其在智能包装领域的... 详细信息

本研究提出了一种高强度可降解纤维素基复合打包带替代传统聚乙烯打包带的可靠策略,采用离子液体溶解制备再生纤维素材料,探讨了石墨烯对其导电性和机械性能的影响,从而制备高强度新型可再生复合打包带,并初步探索了其在智能包装领域的应用前景。结果表明,纤维素含量5%时,制得的再生纤维素丝和再生纤维素膜的拉伸强度分别可达194和74 kPa;双层打包带的最大应力可达26.3 mPa;再生纤维素打包带对于环境湿度和压力变化响应灵敏且具有良好的抗水性和生物降解性;纤维素和石墨烯质量比为1∶1时,纤维素/石墨烯复合材料电导率达0.8 S/m。

关键词：离子液体再生纤维素智能包装石墨烯

Old-growth mixed dipterocarp forests show variable losses and gains in aboveground biomass and standing carbon over forty years

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Forest Ecosystems 2024年第1期11卷 14-23页

作者： Sisira Ediriweera Champika Bandara Tithira Lakkana Shanika Jayasinghe David Woodbury Arun Dayanandan B.m.P.Singhakumara Xiangcheng mi I.A.U.N.Gunatilleke C.V.S.Gunatilleke mark SAshton Department of Science and Technology Uva Wellassa UniversityBadullaSri Lanka The Forest School Yale School of the EnvironmentYale UniversityNew HavenCT06511USA Department of Forestry and Environmental Science University of Sri JayewardenepuraNugegodaSri Lanka State Key Laboratory of Vegetation and Environmental Change Institute of BotanyChinese Academy of SciencesBeijing100093China Botany Department University of PeradeniyaPeradeniyaSri Lanka

Background:No studies have documented long-term trends in aboveground biomass(AGB)for mixed-dipterocarp forests(mDF),the dominant rain forest type in tropical wet equatorial *** our study,we sought to document such trends over forty years across three sites representing lowland to lower montane ***:To do this,we established fifty 100 m×25 m plots in 1978 across three sites sampled along an elevation gradient,identified as mature old-growth *** measured trees for diameter at breast height that we identified to species and *** took wood samples to calculate species wood-specific *** re-measured plots in 1998 and again in ***:We show standing AGB for all sites combined to be 517.52 mg·ha^(-1)in 1978,but this declined by 17%over 40 years to 430.11 mg·ha^(-1).No differences exist among sites in AGB primarily because of considerable within site variation;but interactions of time with site show declines across sites were not uniform,one remained about the *** few species represented a high proportion of the AGB with the top five species comprising between 34%and 65%,depending upon site and year *** species,mesua nagassarium,represented a disproportionately large amount of AGB and decline over time,particularly at the low elevation ***:Our results are directly relevant to estimating AGB and standing carbon sequestered in *** study is the first to demonstrate varying but overall,declining trends in amounts of AGB among forests making predictions of biomass and standing carbon in mDF difficult over wide regions.

关键词： Western ghats Shorea spp. Southeast Asia Sri Lanka Tropical rain forest Wood specific gravity

松果菊苷对db/db糖尿病心肌病小鼠心肌细胞凋亡的改善作用

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医学研究杂志 2023年第8期52卷 88-93页

作者：张祥郝亚荣武汉大学人民医院老年病科 430060

目的探讨肉苁蓉提取物松果菊苷(echinacoside,ECH)对db/db糖尿病心肌病小鼠心肌细胞的保护作用及其作用机制。方法选取29只SPF级6周龄雄性db/db小鼠和db/m小鼠适应性饲养1周后,按照随机数字表法取9只db/m小鼠作为正常对照组(db/m组,n=9)... 详细信息

目的探讨肉苁蓉提取物松果菊苷(echinacoside,ECH)对db/db糖尿病心肌病小鼠心肌细胞的保护作用及其作用机制。方法选取29只SPF级6周龄雄性db/db小鼠和db/m小鼠适应性饲养1周后,按照随机数字表法取9只db/m小鼠作为正常对照组(db/m组,n=9),将db/db小鼠分为糖尿病心肌病组(db/db组,n=10)与ECH干预组(db/db+ECH组,n=10)。其中db/db组和db/m组小鼠每日按照0.05ml/10g标准行0.9%氯化钠溶液灌胃10周。db/db+ECH组小鼠按ECH 300mg/(kg·d)灌胃10周。每周监测3组的小鼠体质量,观察小鼠摄食、饮水及活动情况。于鼠龄第18周用2%戊巴比妥钠腹腔注射麻醉小鼠并处死,取尾静脉血测定空腹血糖和血脂。采用苏木精-伊红(hematoxylin eosin,HE)染色观察心肌组织病理改变,采用TUNEL染色法测定心肌细胞凋亡率,采用Western blot法检测凋亡相关蛋白p53、p38mAPK、caspase-3和caspase-8的表达水平,采用实时荧光定量聚合酶链反应(real-time quantitative polymerase chain reaction,RT-qPCR)测定心肌细胞p53m RNA、p38mAPK mRNA和caspase mRNA、Bcl-2mRNA、Bax mRNA的表达水平。结果与db/m组比较,db/db组小鼠的体质量、血糖和血脂水平显著升高(Pm组比较,db/db组小鼠的心肌细胞可见明显肥大、坏死,心肌细胞排列结构紊乱;而db/db+ECH组小鼠的心肌细胞形态有所缓解,细胞间隙减少,排列较规则。TUNEL染色结果显示,与db/m组比较,db/db组小鼠的心肌细胞凋亡程度显著增高(PmAPK蛋白、caspase-3和caspase-8蛋白表达量显著升高(PmRNA、p38mAPK mRNA和caspase mRNA、Bax mRNA表达量明显上升,Bcl-2mRNA水平下调(PmAPK/caspase信号通路有关。

关键词：松果菊苷糖尿病心肌病凋亡 p53 p38mAPK

Biocompatibility evaluation in vitro. Part III: Cytotoxicity expression of human and animal osteoblasts on the biomaterials

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Journal of Central South University 2001年第3期13卷 147-155页

作者： RUAN Jian-ming 1,m.H. Grant 2 (1. State Key Laboratory for Powder metallurgy, Central South University, Changs ha 410083, China 2. Bioengineering Unit, Strathclyde University, Glasgow, G4 0NW, UK) State Key Laboratory for Powder metallurgy Central South University Changsha China Bioengineering Unit Strathclyde University Glasgow UK

Exclusion and inflammation in the clinic are observe d for various reas ons including material che- mical composition, physical properties as well a s macr o- and micro-structure of the implants, surface condition of the implants, and also patient dependent factors. Cytotoxicity expression of cells is a central issue i n current biocompatibility to screen the potential implant materials and drugs. This study was aimed at investigation reaction between the potential implant mat erials and surround tissue. Cytotoxicity of human and rat osteoblast in the mate rial extracts was determinated by testing standards such as GHS assay, mTT assay , alkaline phosphatase activity assay, LDH assay, and Lowry assay. Research resu lts demonstrated that compared with the control condition polystyrene culture pl a te both human and rat osteoblast cells have normal phenotypic expression in hydr oxyapatite extract, and this expression was statistically restricted in hydroxya patite-spinel extract. How- ever, this restrict, e.g. cytotoxicity could be partially eliminated by immersion treatment of the materials in culture medium.

关键词： biomaterial cytotoxicity biological molecular technique

Effects of material and Dimension on TCF,Frequency,and Q of Radial Contour mode AlN-on-Si mEmS Resonators

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Journal of Electronic Science and Technology 2021年第4期19卷 319-334页

作者： Thi Dep ha with the Faculty of Electronics Technology Industrial University of Ho Chi Minh CityHo Chi Minh City 70000

This paper investigates the effects of material and dimension parameters on the frequency splitting,frequency drift,and quality factor(Q)of aluminium nitride(AlN)-on-n-doped/pure silicon(Si)microelectromechanical systems(mEmS)disk resonators through analysis and *** parameters include the crystallographic orientation,dopant,substrate thickness,and *** resonators operate in the elliptical,higher order,and flexural *** simulation results show that i)the turnover points of the resonators exist at 55°C,-50°C,40°C,and-10°C for n-doped silicon with the doping concentration of 2×1019 cm-3 and the Si thickness of 3.5μm,and these points are shifted with the substrate thickness and mode variations;ii)compared with pure Si,the modal-frequency splitting for n-doped Si is higher and increases from 5%to 10%for all studied modes;iii)Q of the resonators depends on the temperature and ***,the turnover,modal-frequency splitting,and Q of the resonators depend on the thickness and material of the substrate and the *** work offers an analysis and design platform for high-performance mEmS gyroscopes as well as oscillators in terms of the temperature compensation by n-doped Si.

关键词： Anisotropic contour mode doping gyroscope microelectromechanical systems(mEmS)resonator piezoelectric temperature coefficient of frequency(TCF) temperature compensation thin-film piezoelectric-on-substrate(TPoS)

A novel electrolytic-manganese-residues-and-serpentine-based composite(S-EmR) for enhanced Cd(Ⅱ) and Pb(Ⅱ) adsorption in aquatic environment

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Rare metals 2023年第1期42卷 346-358页

作者： meng-Yu ma Xuan Ke Yan-Chang Liu Zhi-hao ha Ting Wang Jia Li Fan Zhang Tian C.Zhang College of Resources and Environmental Science South-Central Minzu UniversityWuhan430074China School of Chemistry and Environmental Engineering Wuhan Institute of TechnologyWuhan430074China College of Engineering University of Nebraska-LincolnOmahaNE68182USA

Electrolytic manganese residue(EmR) is the waste slag generated from the electrolysis manganese *** a promising exploitable adsorbent,EmR has become a hot research ***,EmR’s low adsorption capacity has limited its applications as an efficient *** this study,the EmR was mixed with serpentine and calcined(at 800℃ for 2 h) to prepare a composite adsorbent(S-EmR) with its specific surface area of 11.998 m^(2)·g^(-1)(increased compared to the original EmR) and improved adsorption capacities for Cd^(2+)(98.05 mg·g^(-1)) and Pb^(2+)(565.81 mg·g^(-1)).Kinetic studies have shown that the pseudo-first-order kinetics(PSO)model could best describe the adsorption kinetics of S-EmR for Cd^(2+)/Pb^(2+),implying that the chemisorption process is the rate-limiting *** effects of different interfering ions on S-EmR’ s adsorption for Cd^(2+)/Pb^(2+)may be due to the difference in their *** of response surface methodology tests showed that pH had the highest influence on adsorption,and the removal efficiency of S-EmR reached 99.92% for Cd(Ⅱ) and 94.00%for Pb(Ⅱ).X-ray photoelectron spectroscopy(XPS) analyses revealed that chemical precipitation was the predominant mechanism for Cd^(2+)/Pb^(2+)removal,and the adsorption mechanisms were associated with ion exchange and electrostatic *** results showed that S-EmR could be used as an effective adsorbent for the removal of Cd(Ⅱ)/Pb(Ⅱ) from water bodies,rendering dual benefits of pollution control and resource recovery.

关键词： Cadmium Lead Electrolytic manganese residue Serpentine Heavy metals

Impact on Soil Organic C and Total Soil N from Cool- and Warm-Season Legumes Used in a Green manure-Forage Cropping System

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Agricultural Sciences 2024年第3期15卷 333-357页

作者： Clark B. Neely Francis m. Rouquette Jr. Cristine L.S. morgan Frank m. Hons William L. Rooney Gerald R. Smith Department of Soil and Crop Science Washington State University Pullman WA USA Texas A&m AgriLife Research Overton TX USA Chief Scientific Officer Soil Health Institute Morrisville NC USA Department of Soil and Crop Science Texas A&M University College Station TX USA

Annual forage legumes are important components of livestock production systems in East Texas and the southeastern US. Forage legumes contribute nitrogen (N) to cropping systems through biological N fixation, and their seasonal biomass production can be managed to complement forage grasses. Our research objectives were to evaluate both warm- and cool-season annual forage legumes as green manure for biomass, N content, ability to enhance soil organic carbon (SOC) and soil N, and impact on post season forage grass crops. Nine warm-season forage legumes (WSL) were spring planted and incorporated as green manure in the fall. Forage rye (Secale cereale L.) was planted following the incorporation of WSL treatments. Eight cool-season forage legumes (CSL) were fall planted in previously fallow plots and incorporated as green manure in late spring. Sorghum-sudangrass (Sorghum bicolor x Sorghum bicolor var. sudanense) was planted over all treatments in early summer after forage rye harvest and incorporation of CSL treatments. Sorghum-sudangrass was harvested in June, August and September, and treatments were evaluated for dry matter and N concentration. Soil cores were taken from each plot, split into depths of 0 to 15, 15 to 30 and 30 to 60 cm, and soil C and N were measured using combustion analysis. Nylon mesh bags containing plant samples were buried at 15 cm and used to evaluate decomposition rate of above ground legume biomass, including change in C and N concentrations. mungbean (Vigna radiata L. [Wilczek]) had the highest shoot biomass yield (6.24 t Dm ha-1) and contributed the most total N (167 kg∙ha-1) and total C (3043 kg∙ha-1) of the WSL tested. Decomposition rate of WSL biomass was rapid in the first 10 weeks and very slow afterward. Winter pea (Pisum sativum L. spp. sativum), arrow leaf clover (Trifolium vesiculosum Savi.), and crimson clover (Trifolium incarnatum L.) were the most productive CSL in this trial. Austrian winter pea

关键词： Annual Legumes Soil N Soil Organic C Green manure Deer Browse Forage Cropping Systems