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Carbon-based quantum dots/nanodots materials for potassium ion storage

Chinese Chemical Letters 2025年第4期36卷 83-95页

作者： Zhanheng Yan Weiqing Su Weiwei Xu Qianhui Mao Lisha Xue Huanxin Li Wuhua Liu Xiu Li Qiuhui Zhang School of Science Henan University of EngineeringZhengzhou 451191China Instrumental Analysis Center Henan University of EngineeringZhengzhou 451191China School of Mechanical Engineering Henan University of EngineeringZhengzhou 451191China Department of Chemistry Physical&Theoretical Chemistry LaboratoryUniversity of Oxford South Parks RoadOxford OX13QZUnited Kingdom Guizhou Da Long Hui Cheng New Material Co. Ltd.Tongren 554000China

With the rapid development of electric vehicles,hybrid electric vehicles and smart grids,people's demand for large-scale energy storage devices is increasingly *** a new type of secondary battery,potassium ion battery is promising to replace the lithium-ion battery in the field of large-scale energy storage by virtue of its low price and environmental *** present,the research on the anode materials of potassium ion batteries mainly focuses on carbon materials and the design of various nanostructured metal-based *** such as poor rate performance and inferior cycle life caused by electrode structure comminution during charge and discharge have not been *** dots/nanodots materials are a new type of nanomaterials that can effectively improve the utilization of electrode materials and reduce production *** addition,quantum dots/nanodots materials can enhance the electrode reaction kinetics,reduce the stress generated in cycling,and effectively alleviate the agglomeration and crushing of electrode *** this review,we will systematically introduce the synthesis methods,K+storage properties and K+storage mechanisms of carbon quantum dots and carbon-based transition metal compound quantum dots *** review will have significant references for potassium ion battery researchers.

关键词： Quantum dots Nanodots Potassium ion battery Anode Composite material

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Effects of CeO_(2)Content on the Microstructure and mechanical Properties of ZK60 Mg Alloy

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Acta Metallurgica Sinica(English Letters) 2025年第2期38卷 287-298页

作者： Wei Qiu Shuang-Long Li Zhao-Yuan Lu Sen-Mao Zhang Jian Chen Wei Chen Lang Gan Wei Li Yan-Jie Ren Jun Luo Mao-Hai Yao Wen Xie School of Energy and Power Engineering Changsha University of Science and TechnologyChangsha 410114China Key Laboratory of Energy Efficiency and Clean Utilization The Education Department of Hunan ProvinceChangsha University of Science and TechnologyChangsha 410114China School of Mechanical&Energy Engineering Zhejiang University of Science and TechnologyHangzhou 310023China Hunan Provincial Key Laboratory of Vehicle Power and Transmission System Hunan Institute of EngineeringXiangtan 411104China Hunan Rare Earth Metal Material Research Institute Institute of Rare Earth Light AlloysChangsha 410126China

This study primarily investigates the effect of CeO_(2)content on the microstructure and mechanical properties of ZK60 Mg *** results indicate that CeO_(2)can be reduced by Mg to elemental Ce,predominantly in the form of the Mg-Zn-Ce *** addition of CeO_(2)notably refines the grain size of as-cast ZK60 Mg alloy,with the Mg-Zn-Ce phase primarily distributed along grain *** extrusion,grain size increases and then decreases with increasing CeO_(2)content,while the dynamic recrystallization(DRX)fraction gradually *** behavior is chiefly attributed to the hindrance of the DRX process by a high density of second phases and the restriction of recrystallized grains growth by fine *** basal texture intensity increases progressively with the addition of CeO_(2).As the CeO_(2)content rises,the yield strength(YS)and elongation(EL)of the alloys show significant *** increase in YS is mainly due to the combined effects of grain refinement strengthening and dispersion *** contrast,the enhanced EL is closely related to the heterogeneous structure of the ***,the ZK60-1.2CeO_(2)alloy exhibits the ultimate tensile strength,YS and EL of 274 MPa,160 MPa and 17.3%,respectively.

关键词： Magnesium alloy Rare earth oxides Microstructure mechanical property

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Crafting chirality in three dimensions via a novel fabrication technique for bound states in the continuum metasurfaces

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Light(science & Applications) 2024年第3期13卷 390-392页

作者： Zaid Haddadin Anna My Nguyen Lisa V.Poulikakos Department of Electrical&Computer Engineering University of California San DiegoLa JollaCAUSA Department of Mechanical&Aerospace Engineering University of California San DiegoLa JollaCAUSA Program of Materials Science&Engineering University of California San DiegoLa JollaCAUSA

An additional deposition step was added to a multi-step electron beam lithographic fabrication process to unlock the height dimension as an accessible parameter for resonators comprising unit cells of quasi-bound stat... 详细信息

关键词： dimensions dimension intrinsic

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Evaluating mechanism of banana pseudo-stem retting using seawater:A cost-effective surface pre-treatment approach

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Journal of Bioresources and Bioproducts 2024年第3期9卷 322-335页

作者： Prince Hotor Ahmed H.Hassanin Osbert Akatwijuka Mohamed A.H.Gepreel Mitsuo Yamamoto Yukie Saito Ahmed Abdel-Mawgood Egypt-Japan University of Science and Technology Biotechnology ProgramAlexandria GovernorateNew Borg Al Arab 21934Egypt Alexandria University Department of Textile EngineeringAlexandria GovernorateBab Sharqi 5424041Egypt Egypt-Japan University of Science and Technology Material Science and EngineeringAlexandria GovernorateNew Borg Al Arab 21934Egypt Graduate School of Agricultural and Life Sciences The University of TokyoBunkyo-KuTokyo 113-8657Japan

Retting has been employed to extract natural fibers from agricultural wastes as a biological and cost-effective approach for *** its global abundance,banana pseudo-stem is a promising agro-waste for lignocellulosic fiber *** this study,fibers were extracted from the pseudo-stems after being pre-treated under four conditions using seawater at room temperature for up to 35 d Bacterial isolation from the fresh seawater sample and screening for ligninolytic ability were *** load as well as laccase and manganese peroxidase enzyme activity profile assay during the retting duration were *** transform infrared(FT-IR)and X-day diffraction(XRD)analyses were also examined for both pre-treated and untreated extracted *** results shows that six out of the eight bacterial isolates had the ability to degrade *** treatments(Raw stem+Raw seawater)and(Autoclaved stem+Raw seawater)recorded the highest viable bacterial load of 9.24×102 and 4.46×102 CFU,respectively,on the 14th day of the retting ***,the highest laccase and manganese peroxidase enzymes activity was recorded for(Raw stem+Raw seawater)and(Autoclaved stem+Raw seawater)treatments in the second to the third *** FT-IR spectra of the pre-treated fibers revealed relative reductions in peaks attributed to polysaccharides and other amorphous substances for all retting *** XRD diffractogram revealed that the crystallinity index(CI)of pre-treated fibers increased in all seawater retting treatment ***,the CI for fibers pre-treated under enzymatic conditions were enhanced even after five *** analysis for selected bacterial isolates showed homology to sequences of Bacillus velezensis,Shewanella sp.L8–5,and Citrobacter amalonaticus and Bacillus subtilis j8 *** these findings,it was suggested that physical,biological,and chemical actions were collectively involved in the seawater retting process of banana ps

关键词： Seawater retting Banana pseudo-stem Natural fiber Enzyme activity Colony forming unit

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Sintering-based lithography metal additive manufacturing of chiral mechanical metamaterials with a twist 1

Sintering-based lithography metal additive manufacturing of ...

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1st International Conference on Digital Sovereignty, ICDS 2024

作者： Melentiev, Ruslan Wagih, Ahmed Van Der Heijden, Bram Lubineau, Gilles Grande, Carlos A. Thuwal23955-6900 Saudi Arabia Thuwal23955-6900 Saudi Arabia Mechanical Engineering Program Physical Sciences and Engineering Division Saudi Arabia Thuwal23955-6900 Saudi Arabia Chemical Engineering Program. Physical Science and Engineering Division King Abdullah University of Science and Technology Saudi Arabia

Metamaterials are a cla b of materials with extraordinary capabilities derived from their engineered structure. In 2017, Frenzel et al. (science 358, 2017) conceptualized "three-dimensional mechanical metamaterials with a twist,"which convert linear deformation into rotational motion - a mechanical response that surpa bes the bounds of Cauchy continuum mechanics. However, the lack of suitable manufacturing technologies for producing metallic twist metamaterials has precluded their experimental validation and potential applications to date. Herein, 316L-stainle b-steel twist metamaterials are fabricated at various scales using an emerging sintering-based technology - lithography metal manufacturing (LMM) - and their mechanical responses are tested using stereo digital image correlation. Results provide the first empirical evidence of compre bion-induced rotation in steel twist metamaterials and highlight their sensitivity to manufacturing defects. Video, Application 1 Supplementary 1 Video, Application 2 Supplementary 2 Video, Application 3 Supplementary 3 © 2025 The Author(s).

关键词： Sintering

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Investigational on Biodiesel Exploitation Orange Peel Oil After CI Engine 2nd

Investigational on Biodiesel Exploitation Orange Peel Oil Af...

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2nd International Conference on materials, Design and Manufacturing for Sustainable Environment, ICMDMSE 2022

作者： Aravinth, B. Rameshkannan, C. Manivannan, S. Raj Kumar, V. Rajasekar, N. Department of Mechanical Engineering Dr. Navalar Nedunchezhiyan College of Engineering Tholudur India Centre for Material Science Department of Mechanical Engineering Karpagam Academy of Higher Education Coimbatore India Department of Mechanical Engineering PSG Institute of Technology and Applied Research Coimbatore India

ISBN: (纸本)9789811930522

Improved attentions of the reduction of fossil fuels then the herbal aids of biodiesel gasoline have increased nowadays. Its essential rewards are that it is miles one of the most renewable fuels to be had now and is non-toxic and decaying. It can also be used right away on most diesel engines without the want for huge engine modification. Even though, the fee of biodiesel is a first-rate barrier to its income likened to petroleum-based totally diesel gasoline. Castoff cooking oil is one of the most assets of biodiesel production. Biodiesel production from crude vegetable oil affords a triple-aspect answer: financial, environmental and waste management. New system era advanced through the years has made it feasible to supply biodiesel from recycled fossil fuels which include the notable of biodiesel vegetable oil without a different appealing price drop. Therefore, biodiesel made from recycled frying oil has the equal ability to be used. Many preceding evaluations estimate the rate of biodiesel manufacturing based at the assumptions made with the aid of their authors, concerning production volume, feedstock and chemical technology. From a waste management mind-set, the manufacturing of biodiesel through used frying oils is useful to the environment, as it provides a cleanser way to put off that merchandise. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Biodiesel

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Experimental study on open-end correction of a Helmholtz resonator narrow slit neck

Noise Control Engineering Journal

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Noise Control engineering Journal 2022年第2期70卷 128-135页

作者： Sakamoto, Shuichi Akiba, Yuki Iizuka, Ryo Watanabe, Shunsuke Kominami, Ryota Shintani, Tetsushi Mechanical Engineering Program Faculty of Engineering Niigata University Niigata Japan Graduate School of Science and Technology Niigata University Niigata Japan

In general, the acoustic effective length of the open end of an air column is longer than its geometric length. Here, the effective increment of the geometric length of an air column is called the open-end correction length, which is an acoustically crucial issue. The purpose of this study is to experimentally clarify the open-end correction length for a slit shape with a narrow clearance. For this reason, the sound absorption coefficient was measured using a sample in which the neck of the Helmholtz resonator was shaped as a slit with a narrow clearance. Next, the open-end correction length (i.e., mass end correction length and resistive end correction length) was calculated backward by comparing the experimental and theoretical sound absorption curves. The resistive end correction increased as the slit width became narrower within the range of 0.5 mm or less for both the center slit and the slit near the wall, indicating a significant discrepancy between the theoretical equation and the estimated value. For the mass end correction, in the case the center slit, the estimated value is close to the theoretical value of in the slit width range from 0.3 mm to 1.0 mm. The results of this study may be useful in eliminating discrepancies in correction values for open-end correction in slits with narrow clearance. © 2022 Institute of Noise Control engineering.

关键词： Acoustic wave absorption

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Bubble-pen lithography:Fundamentals and applications

Aggregate

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Aggregate 2022年第4期3卷 85-100页

作者： Pavana Siddhartha Kollipara Ritvik Mahendra Jingang Li Yuebing Zheng Walker Department of Mechanical Engineering The University of Texas at AustinAustinTexasUSA Department of Electrical and Computer Engineering The University of Texas at AustinAustinTexasUSA Material Science and Engineering Program Texas Materials InstituteThe University of Texas at AustinAustinTexasUSA

Developing on-chip functional devices requires reliable fabrication methods with high resolution for miniaturization,desired components for enhanced performance,and high throughput for fast prototyping and mass ***,laser-based bubble-pen lithography(BPL)has been developed to enable sub-micron linewidths,in situ synthesis of custom materials,and on-demand patterning for various functional components and *** exploits Marangoni convection induced by a laser-controlled microbubble to attract,accumulate,and immobilize particles,ions,and molecules onto different *** years have witnessed tremendous progress in theory,engineering,and application of BPL,which motivated us to write this ***,an overview of experimental demonstrations and theoretical understandings of BPL is ***,we discuss the advantages of BPL and its diverse applications in quantum dot displays,biological and chemical sensing,clinical diagnosis,nanoalloy synthesis,and *** conclude this review with our perspective on the challenges and future directions of BPL.

关键词： additive manufacturing capillary flow lithography marangoni convection microbubbles sensing

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PROSPECTIVE LIFE CYCLE ASSESSMENT OF NONWOVEN MAT MANUFACTURING: COMPARING PRE-CONSUMER WOOD WASTE FIBERS TO POST-CONSUMER RECYCLED APPAREL FIBERS

PROSPECTIVE LIFE CYCLE ASSESSMENT OF NONWOVEN MAT MANUFACTUR...

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ASME 2024 International Design engineering Technical Conferences and Computers and Information in engineering Conference, IDETC-CIE 2024

作者： Durrani, Hira Clarke-Sather, Abigail R. Alves, Paulo H.T.F. University of Minnesota Duluth Applied Material Science DuluthMN United States Department of Mechanical and Industrial Engineering DuluthMN United States

ISBN: (纸本)9780791888391

The apparel industry’s substantial contribution to increasing Municipal Solid Waste (MSW) from discarded apparel through fast fashion approaches necessitates exploring sustainable alternatives. Over the past fifty years, throwing away textiles has risen four times as fast as MSW generation rates in the U.S. This study examines the environmental impact of an existing nonwoven mat manufacturer that uses pre-consumer wood waste to make fiber for nonwoven mats with a post-consumer recycled apparel alternative. This alternative, the Fiber Shredder, a lab-scale innovative mechanical textile recycling technology, takes discarded apparel and turns it into valuable fiber. The recycled cotton fiber produced by the Fiber Shredder from discarded apparel is long enough to manufacture new nonwoven textiles. The final products, nonwoven mats, are intended for landscaping purposes and thus use biodegradable fibers. The novel mechanical textile recycling technology to create fibers from discarded apparel, the Fiber Shredder, developed at the University of Minnesota Duluth, is scaled up theoretically to compare its potential impact upon commercialization to an existing industrial process that creates wood fibers from waste wood. A prospective Life Cycle Assessment (LCA) compared the environmental impacts of three options for manufacturing nonwoven mats;(A) pre-consumer waste wood fibers, (B) current lab scale post-consumer recycled cotton fibers from the Fiber Shredder and (C) post-consumer recycled cotton fibers from the scaled up Fiber Shredder. This LCA encompasses emissions, energy usage, and materials from the acquisition of raw materials through the production processes or cradle-to-gate. The results show that although the lab-scale Fiber Shredder has higher environmental impacts than the commercial nonwoven manufacturer, scaling up the Fiber Shredder will lead to reduced impacts. However, the scaled-up Fiber Shredder still needs improvement in electricity consumption and speed

关键词： Municipal solid waste

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Assessment of the wall effects on the cellular structure by combined planar laser-induced fluorescence and Rayleigh scattering

Assessment of the wall effects on the cellular structure by ...

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AIAA science and Technology Forum and Exposition, AIAA SciTech Forum 2025

作者： Alicherif, Mhedine Chavez, Samir B. Rojas Chatelain, Karl P. Guiberti, Thibault F. Lacoste, Deanna A. PO box 4700 Thuwal23955-6900 Saudi Arabia Mechanical Engineering Program Physical Science and Engineering Division King Abdullah University of Science and Technology Thuwal23955-6900 Saudi Arabia

ISBN: (数字)9781624107238

ISBN: (纸本)9781624107238

This study investigates the structure of the detonation front in a stoichiometric H2-air mixture (2H2-O2-3.76N2), seeded with 2000,ppm of NO, at 25,kPa and 293,K, for two channel positions: centered and near thewalls (side). Acombination of NO-PLIF and Rayleigh scattering techniques was used to characterize key features of the detonation front, such as unburned gas pockets, transverse waves, cellular irregularities, and triple point trajectories. The irregular features were categorized into four distinct "events", and their occurrence probabilities were determined for each configuration based on samples of over one hundred detonation cells. The centered configuration showed fewer irregularities with lower probabilities for all events, indicating a regular structure. In contrast, the side configuration showed higher probabilities for all events, indicating a more irregular structure closer to the walls. With the same techniques a correlation between the formation of unburned gas pockets and a local thickening of the front was investigated. While the processes seems to be interconnected in the center of the channel this correlation is lost closer to the walls. The results suggest a strong dependence between the occurrence detonation irregularities and their position relative to the walls. © 2025, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.

关键词： Rayleigh scattering

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