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SSRN 2023年

作者： Ma, Aijing Wu, Xuan Li, Xueqian Susanti, Yuni Dewi Liu, Dan Li, Hu Kuvarega, Alex T. Mamba, Bhekie B. Gui, Jianzhou Tianjin Key Laboratory of Green Chemical Technology and Process Engineering School of Chemical Engineering and Technology Tiangong University Tianjin300387 China Tianjin Key Laboratory of Green Chemical Technology and Process Engineering School of Material Science and Technology Tiangong University Tianjin300387 China Tianjin Key Laboratory of Green Chemical Technology and Process Engineering School of Chemistry Tiangong University Tianjin300387 China Ningxia Coal Industry Co. Ltd. CHN ENERGY Yinchuan750011 China Institute for Nanotechnology and Water Sustainability College of Science Engineering and Technology University of South Africa Florida Johannesburg1709 South Africa

Considering the background of low carbon emission and environmental protection, the development of electrocatalysts for efficient nitrate reduction to ammonia (NRA) has recently attracted increasing attention. Cu/Cu2O has been widely adopted as an efficient catalyst for the NRA reaction. However, the preparation of Cu/Cu2O with controllable ratios remains a challenge. Herein, a series of Cu/Cu2O were prepared through thermal decomposition of copper nitrate on the surface of hydrothermal carbon (HTC) under different temperatures. The ratios of Cu to Cu2O gradually increased with increasing calcination temperature. The effect of the Cu/Cu2O ratio on the NRA activity was investigated. The Cu/Cu2O/HTC-350 catalyst achieved the optimum NRA performance (Faradaic efficiency: 89.5%, ammonia selectivity: 81.7%). Further research demonstrated that the low energetic barrier for supplying electrons from the catalyst surface to the adsorbed reactant. This study provides a new avenue for the preparation of efficient Cu/Cu2O with controllable ratio catalysts for NRA reaction. © 2023, The Authors. All rights reserved.

关键词： Nitrates

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Revealing Quasi-1D Volume Expansion in Na-/K-Ion Battery Anodes:A Case Study of Sb_(2)O_(3)Microbelts

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CCS Chemistry 2021年第5期3卷 1306-1315页

作者： Zheng Yi Daliang Fang Wanqun Zhang Jie Tian Shimou Chen Jianbo Liang Ning Lin Yitai Qian Department of Applied Chemistry Hefei National Laboratory for Physical Science at MicroscaleUniversity of Science and Technology of ChinaHefei 230026 Beijing Key Laboratory of Ionic Liquid Clean Process CAS Key Laboratory of Green Process and EngineeringInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190 Chemistry Experiment Teaching Center University of Science and Technology of ChinaAnhuli 230026 Experimental Center of Engineering and Material Science University of Science and Technology of ChinaHefei 230026 Department of Chemistry Capital Normal UniversityBeijing 100048

Tailoring a rational structure to control the huge volume variation is practical in regulating alkali-ion battery performance on the basis of the anisotropic properties of crystallized anode ***,a double-serrated orthorhombic antimony oxide(Sb_(2)O_(3))microbelt was prepared by a thermally induced recrystallization/sublimation *** situ transmission electron microscopy(TEM),in situ X-ray powder diffraction(XRD),and ex situ scanning electron microscopy(SEM)measurements demonstrate that Sb_(2)O_(3)microbelts exhibit a quasi-one-dimensional expansion perpendicular to the belt(along the[100]direction)during *** unconstrained microbelt surface space can appropriately accommodate the oriented volume ***,Sb_(2)O_(3)microbelts exhibit enhanced cycling and rate performance in half-cell sodium-ion batteries *** support of reduced graphene oxide(RGO),Sb_(2)O_(3)@RGOcomposites deliver good rate capability(312.3 mAh g−1 at 3 A g−1)for sodium-ion full-cell batteries and good cycling performance(473.9 mAh g−1 at 100 mA g−1 after 100 cycles)for half-cell potassium-ion *** situ Raman measurements reveal that the conversion/alloying-type Sb_(2)O_(3)anode undergoes a fully reversible alloying reaction and partially reversible conversion mechanism,which explains its irreversible capacity during the first *** delicate structural design and clarification of the alkali-ion storage mechanisms facilitate the development of Sb_(2)O_(3)anodes for energy storage applications.

关键词： anisotropic volume expansion microbelts Sb_(2)O_(3) sodium-ion batteries in situ characterizations

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Synthesis and characterization of cellulose nanocrystal derived from paper as nanofiller for polymer insulation materials

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materials Today: Proceedings 2024年 97卷 69-74页

作者： Nurul Shafiqah Amirah Badi Mohamad Zul Hilmey Makmud Chin Se Mun Zuhair Jamain Jahimin Asik Khairatun Najwa Mohd Amin Future Material & Sustainable Energy (FuSE) Research Group Faculty of Science and Natural Resources Universiti Malaysia Sabah 88400 Kota Kinabalu Sabah Malaysia Industrial Chemistry Programme Faculty of Science and Natural Resources Universiti Malaysia Sabah 88400 Kota Kinabalu Sabah Malaysia Faculty of Chemical and Process Engineering Technology College of Engineering Technology Universiti Malaysia Pahang Gambang Kuantan 26300 Pahang Malaysia

The synthesis and characterization of cellulose nanocrystal by utilizing filter paper as the source of material deserves to be an advanced approach. Nanocellulose has received enormous attention due to its unique properties. Being the most abundant organic polymer on earth, nanocellulose is the most suitable candidate for alternative replacement of petroleum-based products. The cellulose was extracted from filter paper by chemical processes involved alkali treatment, bleaching treatment, and acid hydrolysis. Cellulose nanocrystal has been characterized by scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD) and Electrical Impedance Spectroscopy (EIS). The dielectric permittivity of the prepared CNC have been investigated in the different temperatures. The nanofiller CNC exhibits a higher real permittivity value at elevated temperatures (60 °C) in the low-frequency region. At high-frequency region, the real permittivity is independent on temperature. In brief, the studies point to the application potential of CNC for future insulation materials.

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Hydration and carbonation curing of high ferrite clinker(FePC)synthesized using EAF slag

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Low-carbon materials and Green Construction 2024年第1期2卷 136-153页

作者： Elijah Adesanya Visa Isteri Aniruddha Baral Christiane Rößler Theodore Hanein Juho Yliniemi Faculty of Technology Fiber and Particle Engineering Research UnitUniversity of OuluPO Box 430090014 OuluFinland Faculty of Technology University of OuluProcess Metallurgy90014 OuloFinland School of Civil Engineering University of LeedsLeeds LS29JTUK F.A.Finger-Institute for Building Material Science Bauhaus-Universität WeimarWeimarThüringenGermany

This study explores the use of Electric Arc Furnace(EAF)slag as a sustainable alternative raw material in cement clinker *** research demonstrates the synthesis of ferrite-rich clinker using EAF slag,achieving a clinker composition of 47%alite,32%ferrite,and 20%belite while replacing 20%of clinker raw materials ***,iron and silica *** hydration behavior and influence of carbonation curing on the reactivity of the ferrite phase were *** show that the addition of 5%gypsum to the clinker enhanced the hydration rate of alite and ferrite phases,promoting the formation of portlandite,C-S-H and ettringite as the major hydration *** of ferrite-rich cement,Fe/Al-rich siliceous hydrogarnet was also identified as secondary hydration products of the ferrite phase,formed as a result of the reaction of katoite(formed from ferrite dissolution)with dissolved ***,prolonged carbonation exposure led to a decrease in the formation of the hydrogarnet and the decomposition of ettringite,but the mortar’s strength increased with increasing calcium carbonate formation.

关键词： Brownmillerite Steel slag Carbonation Low-carbon cement EAF slag

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Self-adaptive hydrogel for breast cancer therapy via accurate tumor elimination and on-demand adipose tissue regeneration

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Chinese Chemical Letters 2024年第1期35卷 371-378页

作者： Ran Tian Xinyu Qiu Wenyun Mu Bolei Cai Zhongning Liu Shiyu Liu Xin Chen School of Chemical Engineering and Technology Department of Chemical EngineeringShaanxi Key Laboratory of Energy Chemical Process IntensificationXi'an Jiao Tong UniversityXi'an 710049China School of Stomatology State Key Laboratory of Military Stomatology&National Clinical Research Center for Oral Diseases&Shaanxi Clinical Research Center for Oral DiseasesDepartment of Preventive DentistryThe Fourth Military Medical UniversityXi'an 710032China School of Stomatology State Key Laboratory of Military StomatologyDepartment of Oral and Maxillofacial SurgeryThe Fourth Military Medical UniversityXi'an 710032China Department of Prosthodontics Peking University School and Hospital of StomatologyNational Clinical Research Center for Oral DiseasesNational Engineering Laboratory for Digital and Material Technology of StomatologyBeijing Key Laboratory of Digital StomatologyBeijing 100081China School of Stomatology State Key Laboratory of Military StomatologyNational Clinical Research Center for Oral DiseasesShaanxi International Joint Research Center for Oral DiseasesCenter for Tissue EngineeringThe Fourth Military Medical UniversityXi'an 710032China

The irregular defects and residual tumor tissue after surgery are challenges for effective breast cancer ***,a smart hydrogel with self-adaptable size and dual responsive cargos release was fabricated to treat breast cancer via accurate tumor elimination,on-demand adipose tissue regeneration and effective infection *** hydrogel consisted of thiol groups ended polyethylene glycol(SH-PEG-SH)and doxorubicin encapsulated mesoporous silica nanocarriers(DOX@MSNs)double crosslinked hyaluronic acid(HA)after loading of antibacterial peptides(AP)and adipose-derived stem cells(ADSCs).A pH-cleavable unsaturated amide bond was pre-introduced between MSNs and HA frame to perform the tumor-specific acidic environment dependent DOX@MSNs release,meanwhile an esterase degradable glyceryl dimethacrylate cap was grafted on MSNs,which contributed to the selective chemotherapy in tumor cells with over-expressed *** bond cleavage between MSNs and HA would also cause the swelling of the hydrogel,which not only provide sufficient space for the growth of ADSCs,but allows the hydrogel to fully fill the irregular defects generated by surgery and residual tumor atrophy,resulting in the on-demand regeneration of adipose ***,the sustained release of AP could be simultaneously triggered along with the size change of hydrogel,which further avoided bacterial infection to promote tissue regeneration.

关键词： Smart hydrogel with self-adaptable size Breast cancer therapy Dual responsive cargoes release Selective tumor elimination On-demand adipose tissue regeneration Effective bacteria inhibition

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The effect of thermal aging on mechanical properties and morphological properties of thermoplastic vulcanizates based on natural rubber and polystyrene 8th

The effect of thermal aging on mechanical properties and mor...

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8th International Conference on Nanostructures, Nanomaterials and Nanoengineering, ICNNN 2019 and 4th International Conference on materials technology and Applications, ICMTA 2019

作者： Nu-Yang, Prathumrat Wiriya-Amornchai, Atiwat Yoon, Jaehoon Saechau, Chainat Rattanamusik, Poom Material and Process Engineering Technology Faculty of Engineering and Technology King Mongkut’s University of Technology North Bangkok Rayong Campus Thailand

ISBN: (纸本)9783035715873

Thermoplastic vulcanizates or TPVs is a type of materials exhibiting excellent properties between thermoplastic and elastomer by combining the characteristics of vulcanized rubber with the processing properties of thermoplastics. This research aims to study the effect of thermal aging on the morphology and mechanical properties of thermoplastic vulcanizates (TPVs) based on a mixture of natural rubber (NR) and polystyrene (PS). TPVs samples were prepared using the internal mixer at a mass ratio of NR/PS 70/30, 50/50, 30/70 and 0/100. Tensile properties and impact strength showed that when the amount of NR increased tends of impact strength and elongation at break increased but tends of tensile strength decreased. On the other hand, tends of tensile strength for thermal aging at 70°C for 3 days increased when the amount of PS increase. The blending ratio of NR / PS at 70/30 is the best. It gave a worthy increase from 19.94 MPa to be 25.56 MPa (28.18%). © 2020 Trans Tech Publications Ltd, Switzerland.

关键词： Rubber

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Mycelium-Based Biocomposites from Recycled Wood: Influence of Fungal Species on Properties of Biocomposites 32

Mycelium-Based Biocomposites from Recycled Wood: Influence o...

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32nd International Conference on Wood Science and technology: Unleashing the Potential of Wood-Based materials, ICWST 2023

作者： Štěpán, Hýsek Markéta, Daňková Miroslav, Jozífek Miroslav, Němec Rupert, Wimmer Institute of Wood Technology and Renewable Materials Department of Material Sciences and Process Engineering University of Natural Resources and Life Sciences Vienna Austria Department of Wood Processing and Biomaterials Faculty of Forestry and Wood Sciences Czech University of Life Sciences Prague Prague Czech Republic Department of Horticulture Faculty of Agrobiology Food and Natural Resources Czech University of Life Sciences Prague Prague Czech Republic

ISBN: (纸本)9789532920833

Mycelium-based bio-composites (MBB) are composite materials that are produced by the growth of fungal mycelia on the substrate from lignocellulosic (LC) materials such as straw, husks or wood particles. Adhesives are not used in this technology to produce composites, because the LC particles are bonded by mycelium. MBB can be used for packaging, decorative design objects or for furniture. In the presented research particles from recycled wood were used to produce not-pressed MBB. Ganoderma lucidum, Ganoderma lingzhi and Pleurotus ostreatus were selected to grow the MBB from recycled wood. Tensile strength perpendicular to the plane of the board (internal bonding) and moisture uptake of the produced variants of MBB as well as fungi growth rate were evaluated. It was observed that all used fungal species were able to fully colonise the substrate from recycled wood and that the contaminants present in the recycled wood did not negatively affect the ability of fungi to colonise the substrate. Produced MBB reached promising properties that offer the possibility of using the developed material for thermal insulation purposes. © 2023 ICWST 2023 - 32nd International Conference on Wood Science and technology: Unleashing the Potential of Wood-Based materials, Proceedings. All Rights Reserved.

关键词： Mycelium

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Evolution of microstructure of aluminum alloy hollow shaft in cross wedge rolling without mandrel

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Journal of Central South University 2022年第3期29卷 807-820页

作者： YU Zi-ming PENG Wen-fei ZHANG Xiao OLEKSANDR Moliar TITOV Viacheslav Faculty of Mechanical Engineering and Mechanics Ningbo UniversityNingbo 315211China Zhejiang Provincial Key Laboratory of Part Rolling Technology Ningbo UniversityNingbo 315211China The Department of Mechanics of Material Plasticity and Resource-Saving Process National Technical University of UkraineKyiv 03056Ukraine

During the process of cross wedge rolling of aluminum alloy hollow shaft, the evolution of its microstructure has an important influence on the mechanical properties of the rolled piece. In order to obtain the microstructure evolution law of aluminum alloy hollow shaft in cross wedge rolling without mandrel, a finite element model is constructed through the finite element software Deform-3D. The influences of rolling temperature, sectional shrinkage,spreading angle and forming angle on the average grain size of rolled piece are studied by numerical simulation of microstructure evolution. The cellular automata method reveals the inherent relationship between the process parameters and the evolution of the microstructure, and provides a reference for optimizing the rolling process parameters of aluminum alloy hollow shafts and improving the forming quality. The results show that the average grain size of the rolled piece increases with the increase of the rolling temperature, decreases with the increase of the sectional shrinkage,and decreases first and then increases with the increase of the spreading angle, and changes little with the increase of the forming angle.

关键词： cross wedge rolling without mandrel hollow shaft cellular automata rolling parameters microstructure evolution

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Influence of pre-torsion and low-temperature aging on ZK60 magnesium alloy

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Journal of Magnesium and Alloys 2025年

作者： Hu, Jiaqi Liang, Xinyue Shi, Weishuai Gao, Hong School of Chemical Engineering and Technology Tianjin University Tianjin 300350 China Engineering Research Center for Magnesium-based New Material Center for Advancing Materials Performance from the Nanoscale State Key Laboratory for Mechanical Behavior of Materials Xi'an Jiaotong University Xi'an710049 China Zhejiang Institute of Tianjin University Zhejiang Ningbo315201 China Tianjin Key Laboratory of Chemical Process Safety and Equipment Technology Tianjin 300350 China

Magnesium alloys are widely used in aerospace and automotive industries due to their lightweight. However, their poor fatigue performance limits the broader application, especially in dynamic stress environments. This study explores novel coupled pretreatments of free-end large-angle pre-torsion and low-temperature aging to improve the fatigue resistance of rolled ZK60 magnesium alloy. STA (pre-torsion followed by low-temperature aging) and SAT (low-temperature aging followed by pre-torsion) samples were prepared to investigate the influences of pretreatment coupling sequences. The results of microstructure characterization reveal that pre-torsion significantly enhances the formation of tensile twins and introduces a gradient microstructure with increased dislocation density from the center to the edges. STA process resulted in the highest twinning area fraction of 35.2 % and a kernel average misorientation of 0.94 at the edge. Mechanical testing demonstrated that the coupled pre-treatment obtained a better combination of strength and plasticity, significantly improved the yield strength in the compression stage, and increased the tensile-compressive yield ratio to >0.9. In the low-cycle fatigue test, the STA samples exhibited lower cyclic mean stress, a smaller cyclic hardening trend, and better hysteretic symmetry, leading to an improvement in fatigue life of up to 256 %. The findings suggest that the combined pre-torsion and low-temperature aging treatments offer a promising approach to enhance the mechanical properties and fatigue resistance of ZK60 magnesium alloy, making it suitable for structural applications in demanding environments. © 2025

关键词： Magnesium alloys

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Mesoporous Cumn2o4 Nanoframework as an Efficient Catalyst for the Synthesis of Benzimidazole Derivatives Through Air Oxidative Coupling in Water

SSRN

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SSRN 2024年

作者： Chai, Kejie Xia, Weida Chen, Handan Su, Weike Xu, Weiming Su, An Key Laboratory of Pharmaceutical Engineering of Zhejiang Province National Engineering Research Center for Process Development of Active Pharmaceutical Ingredients Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals Zhejiang University of Technology Hangzhou310014 China College of Material Chemistry and Chemical Engineering Hangzhou Normal University Hangzhou311121 China College of Chemical Engineering Zhejiang University of Technology Hangzhou310014 China

Mixed-metal oxide (MMO) CuMn2O4 nanoframework with a mesoporous structure was synthesized. The advantages of this mesoporous MMO are its large specific surface area, uniform pore size, and various metal valence states. MMO CuMn2O4 nanoframework showed efficient catalytic activity in the oxidative coupling of 2-amino/hydroxy/mercaptoanilines with various alcohols in the preparation of benzimidazoles, benzoxazoles, and benzothiazoles using water as the sole solvent in high yields. The efficient catalytic activity is mainly attributed to large specific surface area, increased number of active sites, solvent reorganization between the pores of mesoporous CuMn2O4 nanoframework, and the various electronic states of the copper and manganese ions (Cu+, Cu2+, Mn3+, Mn4+) due to the Jahn-Teller effect. This research provides new insights into improving the catalytic performance of catalyst for the synthesis of nitrogen-containing five-membered ring compounds. © 2024, The Authors. All rights reserved.

关键词： Catalyst activity

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