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Controlled Synthesis of Fe3o4/Mno2 (3 1 0)/Zif-67 Composite with Enhanced Synergetic Effects for the Highly Selective and Efficient Adsorption of Cu (Ii) from Simulated Copperplating Effluents

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SSRN 2023年

作者： Wang, Fan Zheng, Yueying Wei, Xinggang Lan, Dawei Zhu, Jintao Chen, Yingjie Wo, Ziquan Wu, Tao New Materials Institute University of Nottingham Ningbo315100 China Department of Chemical and Environmental Engineering University of Nottingham Ningbo China Ningbo315100 China Key Laboratory of Carbonaceous Wastes Processing and Process Intensification of Zhejiang Province Ningbo315100 China SAILARK digital technology Co. Ltd Shanghai200000 China Zhejiang - Canada Joint Laboratory on Green Chemicals and Energy China Department of Material Science and Engineering Guangdong Technion-Israel Institute of Technology Shantou City515000 China

In this study, a highly selective adsorption of Cu (II) is achieved by a designed composite material with an internal synergetic effect between multiple components. The Fe3O4/MnO2/ZIF-67 composite was synthesized by a controlled approach to form MnO2 with a desired (3 1 0) facet to achieve high adsorption selectivity, capacity, and rate. Experimental results showed that the composite exhibits excellent selectivity in adsorbing Cu (II) with a partition coefficient K of Cu (II) 2.2-5.3 times that of other coexistence ions. The composite also demonstrated an excellent adsorption capacity of 1261.0 mg g-1 and a fast adsorption rate of 840.7 mg g-1 h-1 at 298 K. Moreover, its magnetic property enables it easily separated from wastewater, which increases its potential for commercial application. The synergetic effect mechanism was analyzed by characterizations and DFT calculations, and a detailed design demonstration of the above process was carried out. © 2023, The Authors. All rights reserved.

关键词： Adsorption

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Monitoring the Evolution of Dimensional Accuracy and Product Properties in Property-Controlled Forming processes

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SSRN 2023年

作者： Stebner, Sophie Charlotte Martschin, Juri Arian, Bahman Dietrich, Stefan Feistle, Martin Hütter, Sebastian Lafarge, Rémi Laue, Robert Li, Xinyiang Schulte, Christopher Spies, Daniel Thein, Ferdinand Wendler, Frank Wrobel, Malte Vasquez, Julian Rozo Dölz, Michael Münstermann, Sebastian Integrity of Materials and Structures RWTH Aachen University Aachen Germany Institute of Forming Technology and Lightweight Components Dortmund University Dortmund Germany Forming and Machining Technology Paderborn University Paderborn Germany Institute for Applied Materials - Material Science Karlsruhe Institute of Technology Karlsruhe Germany Fraunhofer Institute for Casting Composite and Processing Technology Garching Germany Institute of Materials and Joining Technology Otto-von-Guericke University Magdeburg Germany Forming and Machining Processes Technische Universität Dresden Dresden Germany Institute for Machine Tools and Productions Processes Virtual Production Engineering Chemnitz University of Technology Chemnitz Germany Institute of Metal Forming RWTH Aachen University Aachen Germany Institute of Automatic Control RWTH Aachen University Aachen Germany Institute for Production Engineering and Forming Machines Technical University of Darmstadt Darmstadt Germany Institut für Geometrie und Praktische Mathematik RWTH Aachen University Aachen Germany Measurement and Sensor Technology Chemnitz University of Technology Chemnitz Germany Digital Process Engineering Group Institute for Mechanical Process Engineering and Mechanics Karlsruhe Institute of Technology Karlsruhe Germany Materials Test Engineering Dortmund University Dortmund Germany

As recent trends in manufacturing engineering disciplines show a clear development in the sustainable as well as economically efficient design of forming processes, monitoring techniques have been gaining in relevance. In terms of monitoring of product properties, most processes are currently open-loop controlled, entailing that the microstructure evolution, which determines the final product properties, is not considered. However, a closed-loop control that can adjust and manipulate the process actuators according to the required product properties of the component will lead to a considerable increase in efficiency of the processes regarding resources and will decrease postproduction of the component. For most forming processes, one set of component dimensions will result in a certain set of product properties. However, to successfully establish closed-loop property controls for the processes, a systematic understanding of the reciprocity of the dimensions after forming and final product properties must be established. This work investigates the evolution of dimensional accuracy as well as product properties for a series of forming processes that utilize different degrees of freedom for process control. © 2023, The Authors. All rights reserved.

关键词： process control

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Extrusion-based additive manufacturing of fungal-based composite materials using the tinder fungus Fomes fomentarius

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Fungal Biology and Biotechnology 2021年第1期8卷 21页

作者： Chen, Huaiyou Abdullayev, Amanmyrat Bekheet, Maged F. Schmidt, Bertram Regler, Isabel Pohl, Carsten Vakifahmetoglu, Cekdar Czasny, Mathias Kamm, Paul H. Meyer, Vera Gurlo, Aleksander Simon, Ulla Chair of Advanced Ceramic Materials Institute of Material Science and Technology Faculty III Process Sciences Technische Universität Berlin Straße des 17. Juni 135 Berlin 10623 Germany Chair of Applied and Molecular Microbiology Institute of Biotechnology Faculty III Process Sciences Technische Universität Berlin Straße des 17. Juni 135 Berlin 10623 Germany Department of Materials Science and Engineering Izmir Institute of Technology Urla Izmir 35430 Turkey Institute of Applied Materials Helmholtz-Zentrum Berlin für Materialien und Energie Hahn-Meitner-Platz 1 Berlin 14109 Germany

Background: Recent efforts in fungal biotechnology aim to develop new concepts and technologies that convert renewable plant biomass into innovative biomaterials. Hereby, plant substrates become metabolized by filamentous fungi to transform them into new fungal-based materials. Current research is thus focused on both understanding and optimizing the biology and genetics underlying filamentous fungal growth and on the development of new technologies to produce customized fungal-based materials. Results: This manuscript reports the production of stable pastes, composed of Fomes fomentarius mycelium, alginate and water with 71 wt.% mycelium in the solid content, for additive manufacturing of fungal-based composite materials. After printing complex shapes, such as hollow stars with up to 39 mm in height, a combination of freeze-drying and calcium-crosslinking processes allowed the printed shapes to remain stable even in the presence of water. The printed objects show low bulk densities of 0.12 ± 0.01 g/cm³ with interconnected macropores. Conclusions: This work reports for the first time the application of mycelium obtained from the tinder fungus F. fomentarius for an extrusion-based additive manufacturing approach to fabricate customized light-weight 3D objects. The process holds great promise for developing light-weight, stable, and porous fungal-based materials that could replace expanded polystyrene produced from fossil resources. © 2021, The Author(s).

关键词： Additive manufacturing Alginate Extrusion Freeze-drying Fungi Micro-computed tomography Mycelium Tinder fungus

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Integrated sensing from the synergetic color change of the center/brush of cholesteric liquid crystal particles

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Science China materials 2022年第9期65卷 2565-2577页

作者： Yuanyuan Shang Chenglin Zheng Guochun Zhang Dong Chen Jingxia Wang Lei Jiang CAS Key Laboratory of Bio-inspired Materials and Interfaces Sciences Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China Center of Material Science and Optoelectronics Engineering School of Future TechnologiesUniversity of Chinese Academy of SciencesBeijing 100049China Ji Hua Laboratory Foshan 528000China Key Laboratory of Functional Crystals and Laser Technology of Chinese Academy of Sciences Key Laboratory of CryogenicsTechnical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China Institute of Process Equipment College of Energy EngineeringZhejiang UniversityHangzhou 310027China

Cholesteric liquid crystal(CLC)particles can adaptively respond to constant changes in external stimuli and thus are widely used in solvent-sensing,pattern fabrication,and *** studies discussed the color change at the center of the particles for various ***,few studies analyzed the color change of the brush structure of particles in response to various applications because of the complicated birefringence *** this paper,we present a novel integrated sensing system based on the synergetic color change from the center and the brush structure of CLC *** system provides abundant and additional sensing information relative to the traditional *** particles are prepared by mixing reactive mesogens,a reactive chiral dopant,a non-reactive LC molecule,and a photoinitiator by using a microfluidic device and subsequent *** CLC particles exhibit gorgeous color at the center and brush structure upon various solvent stimuli because of the Bragg reflection and the birefringence effect,which is explained by the possible color-changing mechanism introduced in this *** proof-of-concept applications,such color-changing polymer particles are demonstrated in multi-solvent-sensing detection and pattern *** study provides new insights into the development of stimuli-responsive advanced functional materials with tailorable nanostructures toward technological applications ranging from sensing to display.

关键词： cholesteric liquid crystal particles integrated-sensing center-brush structure synergetic color change

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A green recycling process for spent lithium-ion batteries with extremely low chemical consumption

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Fundamental Research 2024年

作者： Lv, Weiguang Zheng, Xiaohong Cao, Hongbin Wang, Yue Ning, Pengge Zhang, Yi Sun, Zhi National Engineering Research Center of green recycling for strategic metal resources Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 China School of Chemical Engineering University of Chinese Academy of Sciences Beijing 100190 China Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes National Laboratory of Mineral Materials School of Material Sciences and Technology China University of Geosciences Beijing 100083 China Chemistry & Chemical Engineering Data Center Chinese Academy of Sciences Beijing 100864 China

Selective recovery of lithium from spent cathodes is an attractive, green and efficient recycling method for spent lithium-ion batteries (LIBs). However, current technologies face numerous challenges including high reagent consumption, limited versatility and significant secondary pollution. In this study, we found that an intermediate phase formed during leaching exhibited high physiochemical stability, which hindered leaching of Li⁺ and led to increased reagent and energy consumption. A simple mechanical activation strategy was used to change the intermediate phase of the leaching process by activating the spent cathode without grinding additives. The energy input of the mechanical force resulted in defects in the activated waste, leading to a novel activated intermediate phases. Through experimental characterization and DFT analyses, this novel intermediate phase containing H⁺ was found to have a large specific surface area, large internal stress and low reaction energy, which enabled the leaching of the Li⁺. As a result, the method showed a high utilization efficiency of H⁺ in recycling most spent cathodes. In the end, we established a closed-loop recovery route for spent LIBs that exhibited exceptional efficiency for H⁺ utilization (> 97 %), obviated the need for auxiliary reagents, and substantially reduced secondary pollutant generation. © 2024

关键词： Intermediate phase LIBs recycling Mechanical activation Selective extraction Spent LIBs

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Effect of compound surface modification of shot peening and DLC coating on surface integrity and fatigue properties of gear steel 16Cr3NiWMoVNbE

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Heliyon 2024年第18期10卷 e37991页

作者： Yu, Bo Xu, Chunling Gao, Kaixiong Yang, Wenming Wang, Xin Sun, Zhongwu Zhang, Bin Tang, Zhihui Surface Engineering Institution AECC Beijing Institute of Aeronautical Materials Beijing 100095 China Aviation Key Laboratory of Advanced Corrosion and Protection on Aviation Materials AECC Beijing Institute of Aeronautical Materials Beijing 100095 China State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou China School of Mechanical Engineering University of Science and Technology Beijing 100083 China School of Material Science and Engineering Nanchang Hangkong University Nanchang 330063 China Process Technology Center AECC Harbin Dongan Aero-engine Co. Ltd Harbin 150066 China

We conducted a study on the surface compound modification of shot peening and pure carbon DLC coating to simultaneously meet the requirements of wear resistance and fatigue resistance of spline structure. The effects of surface compound modification were investigated on the surface morphology, residual stress profile, microstructure, and nano-indentation hardness of 16Cr3NiWMovNbE gear steel, and conducted a comparative study on fatigue performance. The results show that the surface compound modification inherits the surface morphology and compressive residual stress gradient of shot peening, while the surface residual stress is slightly smaller than that of shot peening. In addition, surface compound modification still reflects the characteristics of high hardness and high fracture resistance of DLC coatings. Under the bending load based on spline tooth root, compared to the original specimen, the fatigue life after shot peening, pure carbon DLC coating, and surface compound modification is increased by 3.68, 2.35, and 3.36 respectively. Although the compound modified surface still maintains the shot peening morphology with a increasing surface roughness and stress concentration coefficient, the 100 μm-depth compressive residual stress profile and the subgrain refinement layer introduced, as well as the hard surface layer with good load-bearing capacity, have played the role of fatigue strengthening. © 2024

关键词： DLC gradient coating Fatigue hot peening Surface integrity

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The coal slime-derived zeolite-supported Ru catalyst for ethylene hydroesterification

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Surfaces and Interfaces 2025年 72卷

作者： Yibo Tang Jiabing Chen Xiaowei Zhu Xiaojun Lu Key Laboratory for Green Chemical Process of Ministry of Education and School of Chemical Engineering and Pharmacy Wuhan Institute of Technology Wuhan Hubei 430205 China The Powder Material Research Center Duhe Laboratory Hubei 442000 China

Ethylene hydroesterification is an important carbonyl synthesis reaction that allows the production of corresponding esters from CO, alcohols, and olefins, achieving 100% atom efficiency. This study reports a Ru-based catalyst supported on a catalytic carrier material derived from flotation coal tailings, which demonstrates excellent catalytic performance in the methoxycarbonylation of ethylene to produce methyl propionate (MP). The molecular sieve prepared from the flotation coal tailings has a cubic structure, and the rich folds and grooves on its surface provide excellent anchoring sites for loading Ru nanoclusters. This structure allows better fixation of Ru metal clusters and promotes strong metal-support interactions. After loading 2% Ru, the catalyst exhibits the best catalytic performance. The acidic sites on the molecular sieve provide more protonic acid sites, which facilitate the formation of Ru-H species and enhance the dissociative activation of ethylene via a reverse hydrogen spillover mechanism. This leads to a significant increase in the generation rate of reaction intermediates, thereby improving the catalytic activity. The use of waste flotation coal to prepare molecular sieves achieves waste recycling, with a green and simple preparation process. Furthermore, the results of this study offer new insights for future research on olefin hydroesterification and hydroformylation, as well as other carbonyl synthesis reactions.

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Rejuvenating Mullite-Zirconia Composites from Investment-Casting Shell Waste and Investigation of Their Physicochemical and Theoretical Radiation Shielding Properties

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SSRN 2023年

作者： Avcıoğlu, Celal Avcıoğlu, Suna Bekheet, Maged F. Artır, Recep Technische Universität Berlin Faculty III Process Sciences Institute of Material Science and Technology Fachgebiet Keramische Werkstoffe Advanced Ceramic Materials Straße des 17. Juni 135 Berlin10623 Germany Usak University Scientific Research Projects Coordinatorship Usak64000 Turkey Yıldız Technical University Faculty of Chemistry and Metallurgy Department of Metallurgical and Materials Engineering Davutpaşa Campus Istanbul34210 Turkey Marmara University Faculty of Engineering Department of Metallurgical and Materials Engineering Istanbul34722 Turkey Department of Analysis and Evaluation

The growing global production of high-precision metal products via investment casting increases the amount of ceramic shell wastes (CW) being produced. The disposal of CW causes significant environmental issues, including water and soil pollution. Although the exact chemical composition of the CW varies by the production facility, it is mainly composed of different amounts of mullite, zircon, and silica. This article assesses the feasibility of CW as a raw material in producing high-performance mullite-zirconia ceramics. In this regard, we prepared a mixture containing CW, Al2O3, and MgO and then sintered at 1500, 1550, and 1600 °C with 4h soaking time. Alumina is added to consume the free silica from CW to yield mullite, and MgO is added to obtain proper microstructure development as well as to promote zircon dissociation. The results showed that increasing sintering temperature promotes densification and enhances mechanical properties. The mullite-zirconia composite sintered at 1600 °C presented promising results, with considerable flexural and compressive strength values of 190.18 and 227.93 MPa, respectively, which are comparable to or even better than the mullite ceramics prepared from most other waste materials. Furthermore, the total atomic cross-sections, mass attenuation coefficients, linear attenuation coefficients, mean free paths, half-value layers, energy absorption buildup factors, exposure buildup factors, effective atomic numbers, effective electron densities computed using the EpiXS software, and the neutron removal cross-sections investigated using the PhyX/PSD software. Then the results were compared with the other commonly used radiation shielding materials. © 2023, The Authors. All rights reserved.

关键词： Aluminum oxide

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Research progress on green adsorption process for water pollution control applications

Hybrid Advances

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Hybrid Advances 2025年 8卷

作者： Oyewo, Opeyemi A. Muliwa, Anthony M. Makgato, Seshibe S. Onwudiwe, Damian C. Department of Chemical Engineering College of Science Engineering and Technology University of South Africa (UNISA) c/o Christian de wet & Pioneer Avenue Florida Campus 1710 Johannesburg South Africa Department of Chemical and Process Engineering Moi University P.O. Box 3900-30100 Eldoret Kenya Department of Chemistry School of Physical and Chemical Sciences Faculty of Natural and Agricultural Sciences North-West University Mafikeng Campus Private Bag X2046 Mmabatho 2735 South Africa Material Science Innovation and Modelling (MaSIM) Research Focus Area Faculty of Agriculture Science and Technology North-West University (Mafikeng Campus) Private Bag X2046 Mmabatho South Africa

Anthropogenic activities, such as domestic, agricultural, and industrial activities, are responsible for the increased water resource scarcity and pollution. However, existing water treatment techniques such as adsorption have been used successfully to control water pollution. This process is commonly employed in water treatment and among it is one of the water treatment technologies. Additionally, an increase in the hazardous chemicals in processed water due to the introduction of some chemically synthesized or commercial adsorbents suggests the need for research extension to green adsorption process. The unique properties of green adsorbent, such as adjustable particle size, excessive active sites, high chemical stability, cost-effectiveness, efficiency, bioavailability, and environmentally friendliness promote its usage. Subsequently, this study elucidated the types of green adsorbents, the advantages and limitations of the existing synthesis routes and their performances in water treatment applications. The limitation in the large-scale production of green adsorbents for real industrial applications and their reusability of spent adsorbent is also highlighted. Overall, the future development of green-based adsorbents for real industrial applications is discussed. © 2024 The Authors

关键词： Adsorption Green adsorbents Hybrid Industrialization Large-scale Toxicity

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Fully bio-based composite foams made of wheat gluten and disintegrated spruce tree bark

Results in Materials

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Results in materials 2022年 15卷

作者： Busquets Ferrer, Maria Solt-Rindler, Axel Hansmann, Christian Gindl-Altmutter, Wolfgang Wood K Plus - Competence Centre for Wood Composites and Wood Chemistry Altenberger Strasse 69 Linz 4040 Austria Institute of Wood Technology and Renewable Materials Department of Material Sciences and Process Engineering University of Natural Resources and Life Sciences (BOKU) Konrad Lorenz-Strasse 24 Tulln 3430 Austria

New lightweight materials made from wheat gluten and disintegrated spruce tree bark were studied. Disintegration of bark by dry milling resulted in rather isodiametric particles, whereas steaming and refining resulted in a more fibrous material. All components were blended and mechanically foamed with a hand mixer and subsequently dried in a conventional oven. The density, thermal conductivity, mechanical properties and water absorption were characterized. Densities vary according to their composition from 60 kg m⁻³ up to almost 300 kg m⁻³, as well as thermal conductivity whose lowest values oscillate around 0.04 W m K⁻¹. The mechanical properties are strongly influenced by the type of particle used as reinforcement, with refined particles showing the best results, due to their high aspect ratio. Moreover, the foams produced show water absorption rates ranging from 310 to 480% after 14 h. © 2022

关键词： Bark Foaming Gluten Insulation material Refined particles

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