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Purification of water using TiO2/g-C3N5 nanocomposite: A visible light assisted photocatalytic activity

Zeitschrift fur Physikalische Chemie 2024年第10期238卷 1931-1941页

作者： Chandrasekar, Jayashree Venkatesan, Manikandan Lin, Ja-Hon Kuo, Chi-Ching Institute of Organic and Polymeric Materials Research and Development Center of Smart Textile Technology National Taipei University of Technology Taipei10608 Taiwan Advanced Nanophotonics Technology Lab Department of Electro-Optical Engineering National Taipei University of Technology Taipei10608 Taiwan

Tetracycline hydrochloride (TCN), widely recognized for its broad-spectrum efficacy and cost-effectiveness as an antibiotic, has raised significant environmental and health concerns due to its contamination in water bodies. This study introduces an innovative approach to address this issue by employing a titanium dioxide/graphitic carbon nitride (TiO2/g-C3N5) nanocomposite through photocatalysis. The synthesis of this composite involved a hydrothermal method, and a comprehensive characterization was conducted using XRD, FT-IR, and SEM techniques. The formed heterojunction between TiO2 and g-C3N5 exhibited remarkable photocatalytic degradation capabilities, achieving a removal rate of over 85% within a short period of 135min. This signifies the composite's efficiency in breaking down TCN in aqueous environments. Beyond its high effectiveness, the TiO2/g-C3N5 nanocomposite presents itself as an environmentally friendly and sustainable solution for addressing the critical issues associated with antibiotic contamination in water. This study underscores the potential of photocatalysis using TiO2/g-C3N5 as a promising technology for mitigating the adverse effects of TCN on both ecosystems and human health. © 2024 Walter de Gruyter GmbH, Berlin/Boston.

关键词： Titanium dioxide

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INCLUSION OF MANUFACTURABILITY CONSIDERATIONS ON DESIGN OPTIMIZATION OF A COMPOSITE ROTOR BLADE

INCLUSION OF MANUFACTURABILITY CONSIDERATIONS ON DESIGN OPTI...

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ASME 2024 International Mechanical Engineering Congress and Exposition, IMECE 2024

作者： Wall, Emily S. Haehnel, Robert B. Sharma, Gehendra S. Dalton, Larry McCall, Tonya G. Dettwiller, Ian Huberty, Wayne Center for Advanced Vehicular Systems Mississippi State University StarkvilleMS United States US Army Engineer Research and Development Center HanoverNH United States Institute for Systems Engineering Research Mississippi State University StarkvilleMS United States Center for Advanced Vehicular Systems Extension Mississippi State University CantonMS United States US Army Engineer Research and Development Center VicksburgMS United States Advanced Composites Institute Mississippi State University StarkvilleMS United States

ISBN: (纸本)9780791888599

The optimization of rotor blade aerodynamic and structural design is pivotal for enhancing overall rotorcraft performance in terms of, e.g., reduced power requirements and energy consumption, and increased range and cargo capacity. Use of composite blades are increasing attractive owing to improved fatigue characteristic, reparability, etc., however, not all proposed composite structure designs are practical to manufacture. This research effort explores the intricate relationship between composite blade design and manufacturability, the potential utility of optimization software (e.g., iVABS) to improve the overall manufacturability of a given structural design. Integrated VABS (iVABS) is a software tool developed to aid in the design optimization of composite slender structures. Design parameters can be defined in iVABS to control various aspects of the internal structure such as spar web spacing, web curvature, number of plies, fiber orientation, and materials, many of which have a direct effect on the overall manufacturability of the blade. The team delves into the critical aspects of manufacturability that directly influence the manufacturing process. The overarching goal is to establish rules that will guide a manufacturability assessment that can be integrated into the initial design phase, guiding iVABS towards creating rotor blade designs that not only meet stress, strain and aerodynamic requirements, but are also inherently more manufacturable. The integration of manufacturability considerations into the optimization process, as demonstrated by these efforts, represents a proactive approach to ensuring that optimal structural designs align with the capabilities and constraints of the given manufacturability processes, thereby streamlining the manufacturing process. The research includes the consideration of the manufacturability constraints that could be applied to the identified design parameters and demonstrates how this can be applied via a case study sh

关键词： Design for manufacturability

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Ablation resistance of ZrC coating modified by polymer-derived SiHfOC ceramic microspheres at ultrahigh temperature

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Journal of Materials Science & Technology 2024年第15期182卷 119-131页

作者： Xuemeng Zhang Yuyu Zhang Lingxiang Guo Bing Liu Yuqi Wang Hongbin Li Hejun Li Jia Sun Shaanxi Key Laboratory of Fiber Reinforced Light Composite Materials State Key Laboratory of Solidification ProcessingNorthwestern Polytechnical UniversityXi’an 710072China China Aerodynamics Research and Development Center Mianyang 621000China Science and Technology on Advanced Ceramic Fibers and Composites Laboratory National University of Defense TechnologyChangsha 410073China

Polymer-derived ceramics(PDCs)method opens up new possibilities for the preparation of novel multi-phase ceramic nanocomposites owing to the molecular design of the precursors at the nanoscale *** the current work,ZrC coatings incorporated with polymer-derived ceramic microspheres(CMS),SiH-fOC_CMS,were deposited to enhance the ablation resistance by supersonic atmosphere plasma *** 10.0 MW·m^(-2) plasma ablation at above 3000℃,the linear ablation rate of ZrC-SiHfOC_CMS coat-ing was reduced to 0.20μm·s^(-1),62%lower than that of the pristine ZrC *** improvement was ascribed to the presentence of viscous SiO_(2)/HfO_(2) molten mixed phase,rather than HfSiO4,which can ef-fectively seal pinholes and ***,the in-situ generated crystalline SiO_(2) had a lower oxygen diffusion rate than amorphous SiO_(2),meanwhile,m-HfO_(2) could improve the stability of SiO_(2) glassy film,thus further enhancing the ablation resistance.

关键词： ZrC Polymer-derived ceramics(PDCs) Carbon/Carbon composites Plasma spraying Plasma ablation

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Failure analysis of 3D woven composites under tension based on realistic model

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Chinese Journal of Aeronautics 2024年第11期37卷 242-253页

作者： Binbin ZHANG Guangchang CHEN Bing WANG Jingran GE Mengran LI Zengfei LIU Jun LIANG Institute of Advanced Structure Technology Beijing Institute of TechnologyBeijing 100081China China Helicopter Research and Development Institute Jingdezhen 333001China Center for Composite Materials and Structures Harbin Institute of TechnologyHarbin 150001China Beijing Key Laboratory of Lightweight Multi-functional Composite Materials and Structures Beijing 100081China

The failure behavior of the three-dimensional(3D)woven composites under tension are evaluated via experimentation and *** accurately depict the intricate geometry of the woven composites,including the fluctuation of yarn paths,variations in cross-section,and resin distribution,the image-aided digital elements modeling approach is ***,to further assess both the tensile performance and damage response,a realistic voxel model is established with the integration of a well-suited progressive damage *** obtained stress-strain curves align with the experimental results,and damage progression and underlying mechanisms involved are clearly ***,when subjected to warp tension,severe transverse damage and fiber bundle pull-out towards the warp yarns are observed within the curved ***,under weft loading,longitudinal damage is found to occur in the weft yarns,while the warp yarns suffer from transverse damage,leading to the formation of a smooth and brittle ***,the findings of this study hold potential to advance the engineering applications of the3D woven composites.

关键词： Mechanical properties Failure analysis Woven composites Realistic model Digital element methodology

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Wheel Speed Identification and Longitudinal Vehicle Speed Estimation for Four-Wheel Drive Vehicles 8

Wheel Speed Identification and Longitudinal Vehicle Speed Es...

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8th CAA International Conference on Vehicular Control and Intelligence, CVCI 2024

作者： Wu, Dongmei Liu, Zixuan Yan, Taowei Zhang, Pei Wuhan University of Technology Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan China Dongfeng Motor Corporation Dongfeng Research and Development Center Passenger Vehicle Platform Center Wuhan China

ISBN: (纸本)9798331504892

To address the issue of vehicle speed estimation, particularly at low speeds, applicable to various environmental conditions, especially in the absence of driven wheels for vehicles equipped with four-wheel drive systems, a rule-based wheel speed identification and vehicle speed estimation method is proposed. This technique leverages wheel speed sensors and longitudinal acceleration sensors for vehicles to enhance the precision of wheel speed identification at low speeds and enhance the adaptability of vehicle speed estimation under different conditions. Firstly, to tackle the problem of no wheel speed pulse signal passing within one sampling period at low speeds, estimation is achieved through time accumulation, enabling effective wheel speed identification for both high and low-speed. Furthermore, utilizing the Kalman filtering algorithm and Butterworth filter, the wheel speed and wheel acceleration are filtered separately to reduce signal fluctuations caused by noise interference, thereby providing reliable input signals for estimating vehicle speed. Building upon this, A method for estimating vehicle speed based on the gradient constraint approach is proposed, taking into account the sequential relationships of each wheel speed and the longitudinal acceleration signal. Finally, real vehicle tests under different conditions demonstrate that the proposed vehicle speed estimation technique achieves high estimation accuracy, meeting the vehicle's speed estimation requirements under various environmental factors. © 2024 IEEE.

关键词： Butterworth filters

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Composite armor philosophy(CAP):Holistic design methodology of multi-layered composite protection systems for armored vehicles

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Defence Technology（防务技术） 2024年第11期41卷 181-197页

作者： Evangelos Ch.Tsirogiannis Foivos Psarommatis Alexandros Prospathopoulos Georgios Savaidis EODH SA Research and Development Department63080LakkomaChalkidikisGreece SIRIUS Department of InformaticsUniversity of OsloGaustadalleen 23B0373OsloNorway Physical Metallurgy Laboratory(PML) Mechanical Engineering DepartmentAristotle University of Thessaloniki54124ThessalonikiGreece Centre for Research&Development of Advanced Materials(CERDAM) Center for Interdisciplinary Research and InnovationBalkan CenterBuilding B’10th km Thessaloniki-Thermi Road57001ThessalonikiGreece Laboratory of Machine Elements&Machine Design School of Mechanical EngineeringAristotle University of Thessaloniki54124ThessalonikiGreece Digital Representation and Additive Manufacturing(DRAM) Center for Interdisciplinary Research and InnovationBalkan CenterBuilding B’10th kmThessaloniki-Thermi Road57001ThessalonikiGreece

A philosophy for the design of novel,lightweight,multi-layered armor,referred to as Composite Armor Philosophy(CAP),which can adapt to the passive protection of light-,medium-,and heavy-armored vehicles,is presented in this *** can serve as a guiding principle to assist designers in comprehending the distinct roles fulfilled by each *** CAP proposal comprises four functional layers,organized in a suggested hierarchy of *** notable is the inclusion of a ceramic-composite principle,representing an advanced and innovative solution in the field of armor *** paper showcases real-world defense industry applications,offering case studies that demonstrate the effectiveness of this advanced *** represents a significant milestone in the history of passive protection,marking an evolutionary leap in the *** philosophical approach provides designers with a powerful toolset with which to enhance the protection capabilities of military vehicles,making them more resilient and better equipped to meet the challenges of modern warfare.

关键词： Passive armor protection Composite armor Ballistic performance Protection systems Vehicle protection Armor design

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Enhanced Heat Transfer Technology Based on Emission Reduction and Carbon Reduction in Cutting and Grinding

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Chinese Journal of Mechanical Engineering 2023年第4期36卷 1-3页

作者： Changhe Li Yanbin Zhang Shubham Sharma School of Mechanical and Automotive Engineering Qingdao University of TechnologyQingdao 266520China Department of Mechanical Engineering and Advanced Materials Science Regional Center for Extension and DevelopmentCouncil of Scientific and Industrial Research(CSIR)-Central Leather Research Institute(CLRI)Jalandhar 144021India

Huge carbon emissions in machining process,which characterized by high energy consumption and usage of non-renewable resources,is becoming an obsession in the past *** the face of the international strategy of carbon peak,it is imperative to eliminate the usage of mineral cutting fluids and reduce energy consumption and carbon emissions by green cutting/grinding technologies,such as dry cutting,minimum quantity lubrication(MQL).

关键词： grinding lubrication eliminate

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Plasma-etching on monolithic MOFs-based MIM filter boosted chemical sensing

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Nano research 2024年第4期17卷 2800-2807页

作者： Jianxi Liu Li Feng Zhihuan Li Yang Wu Feng Zhou Yadong Xu Research&Development Institute Northwestern Polytechnical University in ShenzhenShenzhen 518057China State Key Laboratory of Solidification Processing Center of Advanced Lubrication and Seal MaterialsSchool of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi’an 710072China Yantai Zhongke Research Institute of Advanced Materials and Green Chemical Engineering Shandong Laboratory of Advanced Materials and Green Manufacturing at YantaiYantai 264006China State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China

Metal-insulator-metal(MIM)cavity as a lithography-free structure to control light transmission and reflection has great potential in the field of optical ***,the dense top metal layer of the MIM prohibits any external medium from entering the dielectric insulation layer,which limits the application of the cavity in the sensing ***,we demonstrate a series of monolithic metal-organic frameworks(MOFs)based MIM cavities,which are treated by plasma etching to provide channels for chemical diffusion and to advance *** modulate the bandwidth of the MIM filters by controlling the MOF thickness as insulator *** plasma-etching is applied to build channels on the top metal layer without altering their saturation and brightness for chemical sensing *** etching time regulates the number and size of channels on the top metal *** behavior is demonstrated on the plasma-etched MOFs-based MIM cavity when external chemicals diffuse in the *** addition,we generate patterned structure of the MOFs-based MIM cavity via plasma-mask method,which can transfer to different substrates and produce a controllable structure color change for chemical *** MIM cavity may promote the advancement and applications of structural color in security imaging,color display,information anticounterfeiting,and color printing.

关键词： metal-organic frameworks(MOFs) spin-coating metal-insulator-metal filter patterns sensing

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Rational design of carbon skeleton interfaces for highly reversible sodium metal battery anodes

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Journal of Energy Chemistry 2024年第5期92卷 404-413页

作者： Fenqiang Luo Taiyu Lyu Jie Liu Peiwan Guo Junkai Chen Xiaoshan Feng Dechao Wang Zhifeng Zheng Key Laboratory of Advanced Energy Storage Technology Fujian Province UniversityFujian Provincial Industry Technologies Development Base for New EnergyCollaborative Innovation Platform for Advanced Electrochemical Energy Storage TechnologyNational User-Side Energy Storage Innovation Research and Development CenterTan Kah Kee Innovation Laboratory(IKKEM)College of EnergyXiamen UniversityXiamen 361102FujianChina College of Environmental Science and Engineering Fujian Normal UniversityFuzhou 350007FujianChina Department of Chemical Engineering Tsinghua UniversityBeijing 100084China

Sodium metal batteries(SMBs)have attracted increasing attention over time due to their abundance of sodium resources and low ***,the widespread application of SMBs as a viable technology remains a great challenge,such as uneven metallic deposition and dendrite formation during *** skeletons as sodiophilic hosts can alleviate the dendrite formation during the plating/*** the carbon skeleton,how to rationalize the design sodiophilic interfaces between the sodium metal and carbon species remains key to developing desirable Na ***,we fabricated four kinds of structural features for carbon skeletons using conventional calcination and flash Joule *** roles of conductivity,defects,oxygen content,and the distribution of graphite for the deposition of metallic sodium were discussed in *** on interface engineering,the J1600 electrode,which has abundant Na-C species on its surface,showed the highest *** are uniform and rich F-Na species distributed in the inner solid electrolyte interface *** study investigated the different Na-deposition behavior in carbon hosts with distinct graphitic arrangements to pave the way for designing and optimizing advanced electrode materials.

关键词： Carbon skeleton Graphited structure Deposition mechanism Sodiummetal batteries

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Self-powered UVC detectors based on α-Ga_(2)O_(3) with enchanted speed performance

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Journal of Semiconductors 2024年第8期45卷 74-80页

作者： Aleksei Almaev Alexander Tsymbalov Bogdan Kushnarev Vladimir Nikolaev Alexei Pechnikov Mikhail Scheglov Andrei Chikiryaka Laboratory of Metal Oxide Semiconductors Research and Development Center for Advanced Technologies in MicroelectronicsNational Research Tomsk State UniversityTomsk 634050Russia Fokon LLC Kaluga 248035Russia Department of Semiconductor Electronics and Physics of Semiconductors National University of Science and Technology MISISMoscow 119049Russia Perfect Crystals LLC Saint Petersburg 194223Russia

Detectors were developed for detecting irradiation in the short-wavelength ultraviolet(UVC)interval using high-quality single-crystallineα-Ga_(2)O_(3) films with Pt interdigital *** films ofα-Ga_(2)O_(3) were grown on planar sapphire substrates with c-plane orientation using halide vapor phase *** spectral dependencies of the photo to dark current ratio,responsivity,external quantum efficiency and detectivity of the structures were investigated in the wavelength interval of 200−370 *** maximum of photo to dark current ratio,responsivity,external quantum efficiency,and detectivity of the structures were 1.16×10^(4) ***.,30.6 A/W,1.65×10^(4)%,and 6.95×10^(15) Hz^(0.5)·cm/W at a wavelength of 230 nm and an applied voltage of 1 *** high values of photoelectric properties were due to the internal enhancement of the photoresponse associated with strong hole ***α-Ga_(2)O_(3) film-based UVC detectors can function in self-powered operation mode due to the built-in electric field at the Pt/α-Ga_(2)O_(3) *** a wavelength of 254 nm and zero applied voltage,the structures exhibit a responsivity of 0.13 mA/W and an external quantum efficiency of 6.2×10^(−2)%.The UVC detectors based on theα-Ga_(2)O_(3) films demonstrate high-speed performance with a rise time of 18 ms in self-powered mode.

关键词： HVPE gallium oxide solar-blind ultraviolet detector self-powered mode

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