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SSRN 2024年

作者： Li, Zhi Wu, Jiaxin Luo, Jing Zhang, Bowen Li, Yue Cheng, Bo Yang, Jing Li, Binbin Wang, Xinyu State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Xianhu hydrogen Valley Foshan528200 China Sanya Science and Education Innovation Park Wuhan University of Technology Sanya572000 China Biomedical Materials and Engineering Research Center of Hubei Province Wuhan University of Technology Wuhan430070 China School of Foreign Languages Wuhan University of Technology Wuhan430070 China Department of Stomatology Zhongnan Hospital of Wuhan University Wuhan430060 China

Ceria-stabilized zirconia has promising applications in the field of dental materials due to its mechanical and anti-aging properties. However, the fabrication of high-quality ceria-stabilized zirconia ceramics by stereolithography remains a significant challenge owing to the optical properties of ceria. This work aimed to overcome the lack of photopolymerization performance by utilizing alumina sol encapsulated in ceria-stabilized zirconia particles and generating an alumina layer in the ceria-stabilized zirconia particles through heat treatment, with the objective of reducing the absorbance of the ceria-stabilized zirconia slurry. The results indicated a reduction in the absorbance of the modified powder at 405 nm, decreasing from 0.2113 to 0.1384. Additionally, the Vickers hardness, elasticity moduli, flexural strength, and fracture toughness of the Al2O3/CeZrO2 ceramics were observed to be 10.43 ± 0.74 GPa, 231.5 ± 4.2 GPa, 701 ± 89 MPa and 9.74 ± 0.61 MPa·m1/2, respectively. The percentage of monoclinic phases and mechanical properties exhibited minimal variation before and after accelerated low-temperature degradation tests. This study illustrates that ceria-stabilized zirconia modified by alumina sols demonstrate favorable mechanical properties and LTD resistance. The findings may serve as a basis for optimizing the preparation of ceria-stabilized zirconia dental materials via stereolithography. © 2024, The Authors. All rights reserved.

关键词： Fracture toughness

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19.59%Efficiency from Rb_(0.04)-Cs_(0.14)FA_(0.86)Pb(Br_(y)I_(1−y))_(3) perovskite solar cells made by vapor-solid reaction technique

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Science Bulletin 2021年第10期66卷 962-964,M0003页

作者： Long Luo Zhiliang Ku Weixi Li Xin Zheng Xiong Li Fuzhi Huang Yong Peng Liming Ding Yi-Bing Cheng State Key Laboratory of Advanced Technologies for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Foshan 528216China Center for Excellence in Nanoscience(CAS) Key Laboratory of Nanosystem and Hierarchical Fabrication(CAS)National Center for Nanoscience and TechnologyBeijing 100190China

Organic-inorganic hybrid perovskite materials have recently attracted extensive attentions because of their intriguing optoelectronic properties for photovoltaics[1],[2],[3].The power conversion efficiency(PCE)of pero... 详细信息

关键词：太阳电池离子迁移钙钛矿薄膜气相反应迁移速率组件效率反应工艺

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Intraparticle ripening to create hierarchically porous Ti-MOF single crystals for deep oxidative desulfurization

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Dalton transactions (Cambridge, England : 2003) 2023年第35期52卷 12244-12252页

作者： Shen Yu Zhan Liu Jia-Min Lyu Chun-Mu Guo Yi-Long Wang Zhi-Yi Hu Yu Li Ming-Hui Sun Li-Hua Chen Bao-Lian Su Laboratory of Living Materials at the State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology 122 Luoshi Road Wuhan 430070 Hubei China. chenlihua@***. Nanostructure Research Center Wuhan University of Technology Wuhan 430070 Hubei China. School of Chemistry Chemical Engineering and Life Science Wuhan University of Technology Wuhan 430070 Hubei China. Laboratory of Inorganic Materials Chemistry University of Namur 61 rue de Bruxelles B-5000 Namur Belgium.

The catalytic oxidative desulfurization (ODS) technique is able to remove sulfur compounds from fuels, conducive to achieving deep desulfurization for the good of the ecological environment. Ti-based metal-organic frameworks (Ti-MOFs) possessing good affinity to organic reactants and considerable numbers of Ti active sites are promising catalysts for ODS. However, current Ti-MOFs suffer from severe diffusion limitations caused by the size mismatch between sole micropores and bulky sulfur compounds, leading to poor ODS performance. Here, a facile method of intraparticle ripening without any additive is developed to obtain hierarchically meso-microporous Ti-MIL-125 single crystals (Meso-Ti-MIL-125) for the first time. Such Meso-Ti-MIL-125 shows a BET surface area of 1401 m g and a mesoporous volume that is 1.7 times as high as that of the conventional Ti-MIL-125. Our novel Meso-Ti-MIL-125 exhibits excellent catalytic performance in the ODS of a series of bulky thiophenic sulfur compounds, completely removing benzothiophene (BT), dibenzothiophene (DBT), and 4,6-dimethyldibenzothiophene (DMDBT) from model fuels, which is, respectively, 2.4 times, 1.5 times, and 6.7 times higher than the removal achieved with conventional Ti-MIL-125. Such a facile synthetic strategy is envisioned to be applied in many kinds of crystalline materials, such as zeolites, for industrial production.

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Zn-doping enhances the photoluminescence and stability of PbS quantum dots for in vivo high-resolution imaging in the NIR-II window

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Nano Research 2020年第8期13卷 2239-2245页

作者： Xiulei Shi Song Chen Meng-Yao Luo Biao Huang Guozhen Zhang Ran Cui Mingxi Zhang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology430070WuhanChina Key Laboratory of Analytical Chemistry for Biology and Medicine(Ministry of Education) College of Chemistry and Molecular SciencesWuhan UniversityWuhan430072China iChEM(Collaborative Innovation Center of Chemistry for Energy Materials) Hefei National Laboratory for Physical Science at the MicroscaleUniversity of Science and Technology of ChinaHefei230026China

Lead sulfide(PbS)quantum dots(QDs)are important near infrared(NIR)luminescent materials with tunable and strong emission covering a broad NIR ***,their optical properties are quite sensitive to air,water,and high temperature due to the surface oxidation,thus limiting their applications in optoelectronic devices and biological ***,a cation-doping strategy is presented to make a series of high-quality Zn-doped PbS QDs with strong emission covering whole second near-infrared window(NIR-II,1,000-1,700 nm).First-principle calculations confirmed that Zn dopants formed dopant states and decreased the recombination energy gap of host ***,the Zn dopants significantly improved the quantum yield,photoluminescence lifetime and thermal stability of PbS ***,the PEGylated Zn-doped PbS QDs emitting in the NIR-llb window(1,500-1,700 nm)realized the noninvasive imaging of cerebral vascular of mouse with high resolution,being able to distinguish blood *** material not only provides a new tool for deep tissue fluorescence imaging,but is also promising for the development of other NIR related devices.

关键词： quantum dots doping second near-infrared window(NIR-II window) tunable emission in vivo imaging

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Double-Layer Phosphates Coated Mn-Based Oxide Cathodes for Highly Stable Potassium-Ion Batteries

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SSRN 2023年

作者： Wang, Hong Peng, Haoyang Xiao, Zhitong Yu, Ruohan Liua, Fang Zhua, Zhu Zhou, Liang Wu, Jinsong State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Materials Science and Engineering Wuhan University of Technology Wuhan430070 China School of Mathematics and Physics Jingchu University of Technology Jingmen448000 China Wuhan University of Technology Wuhan430070 China Shenzhen Institute of Wuhan University of Technology Guangdong Shenzhen518000 China

Manganese rich oxides with layered structure are now being developed as cathodes for potassium ion batteries (PIBs). Nevertheless, poor cycling stability and sluggish electrochemical kinetics have hindered their practical applications. Here, we construct a thin K3PO4/MnPO4 layer, which has high conductivity of both electron and potassium-ion, on the surface of K0.5Mn0.8Co0.2O2 (KMCO) and achieve improved cycling stability and capacity rate when the composite is used as cathodes in PIBs. Comparing to the pure KMCO, the K3PO4/MnPO4-coated K0.5Mn0.8Co0.2O2 (P-KMCO) has higher electron and K-ion conductivity, less surficial oxygen loss and layered-to-spinel-to-rock salt tri-phase transition, and less internal lattice expansion and contraction in cycling, as studied by aberration-corrected scanning transmission electron microscopy and in-situ X-ray diffraction. The synthesized P-KMCO exhibits a highly reversible specific capacity (101.3 mAh g-1 at 0.1 A g-1), excellent rate performance and stellar capacity retention of 80% after 500 cycles at 1 A g-1 compared to pure KMCO (78.6 mAh g-1 at 0.1 A g-1 with 67.3% capacity retention). The P-KMCO electrode shows also a supreme electrochemical performance when assembled in pouch cells. First-principal calculations imply that the surface modification can effectively prevent TM ions dissolution and oxygen release while cycling. Like those developed in lithium-ion batteries, this work demonstrates the appropriate surface engineering is also an effective approach to development stable cathodes of PIBs. © 2023, The Authors. All rights reserved.

关键词： Cathodes

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Phosphorus Coordinated Co/Se2 Heterointerface Nanowires: In-Situ Catalyst Reconstruction Toward Efficient Overall Water Splitting in Alkaline and Seawater Media

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SSRN 2023年

作者： Boakye, Felix Ofori Harrath, Karim Tabish, Mohammad Yasin, Ghulam Owusu, Kwadwo Asare Ajmal, Saira Zhang, Wenbin Zhang, Haining Zhao, Wei Institute for Advanced Study Shenzhen University Shenzhen518060 China College of Physics and Optoelectronic Engineering Shenzhen University Shenzhen518060 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Department of Chemistry Guangdong Provincial Key Laboratory of Catalytic Chemistry Southern University of Science and Technology Guangdong Shenzhen518055 China College of Materials Science and Engineering Beijing University of Chemical Technology Beijing100029 China

Designing a highly efficient electrocatalyst to realize overall water splitting is vital, yet identifying the active site remains an ongoing challenge. Herein, the electrochemical in situ surface activation of P@Co/Se2-NW/CC was investigated to understand the enhanced OER activity of P@Co/Se2-NW/CC. The incorporation of phosphorus is thought to increase the number of vacancies surrounding the Co cations in the initial Co/Se2 and speed up the structural change into "active species" like cobalt oxide/oxyhydroxide. The as-synthesized P@Co/Se2-NW/CC required a low overpotential for OER (η20 = 170 and 200 mV) and HER (η10 = 52 and 82 mV), respectively, in alkaline water and alkaline seawater media. In situ FTIR and Post characterization unraveled the existence of surface-bounded Co oxide species on P@Co/Se2-NW/CC after OER catalysis, which is responsible for the enhanced electrocatalytic activity. This study offers a valuable strategy for developing noble-metal-free bifunctional catalysts for efficient hydrogen generation from alkaline seawater and alkaline water electrolysis. © 2023, The Authors. All rights reserved.

关键词： Oxygen

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Domain Evolution, Dielectric and Piezoelectric Response in Bent Freestanding PbTiO3 Ferroelectric Nanowires

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SSRN 2024年

作者： Zhou, Meng-Jun Peng, Kun Tan, Yueze Yang, Tiannan Chen, Long-Qing Nan, Ce-Wen State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Center of Smart Materials and Devices School of Materials Science and Engineering Wuhan University of Technology Wuhan430070 China Department of Materials Science and Engineering Materials Research Institute The Pennsylvania State University University ParkPA16802 United States School of Mechanical Engineering Shanghai Jiao Tong University Shanghai200240 China School of Materials Science and Engineering State Key Lab of New Ceramics and Fine Processing Tsinghua University Beijing100084 China

Ferroelectric oxides with excellent flexibility are of significant practical and theoretical interests in recent studies. With most up-to-date research efforts, the effect of large bending on properties of nano-scale ferroelectric materials is still to be investigated. In this work, we elucidate the effect of bending angle on ferroelectric domain structures and material properties of bending PbTiO3 nanowires using phase-field simulations and thermodynamic modeling. We find non-monotonic dependencies of the coercive fields, dielectric responses and piezoelectric properties on the bending angle. A maximum enhancement of 462% and 226% in the dielectric constant and piezoelectric coefficient, respectively, is achieved at an 18° bending angle for the PbTiO3 nanowire with a radius of R = 10 nm and length L=100 nm, which is attributed to the formation of strong-response zones within the nanowire as illustrated by both the phase-field and thermodynamic analysis. The current work provides useful theoretical insights for the experimental explorations into ferroelectric functionalities of nanomaterials and potential applications of high-performance flexible ferroelectric-based nanodevices. © 2024, The Authors. All rights reserved.

关键词： Piezoelectricity

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Directional transport for efficient catalysis

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Matter 2023年第3期6卷 674-676页

作者： Jie Ying Mark D. Symes Xiao-Yu Yang School of Chemical Engineering and Technology Sun Yat-sen University Zhuhai 519082 China WestCHEM School of Chemistry University of Glasgow University Avenue Glasgow G12 8QQ UK State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & Shenzhen Research Institute & Joint Laboratory for Marine Advanced Materials in National Laboratory for Marine Science and Technology (Qingdao) Wuhan University of Technology Wuhan 430070 China School of Engineering and Applied Sciences Harvard University Cambridge MA 02138 USA

Directional transport is a common phenomenon in nature that underpins the efficient completion of a number of complex and elaborate processes. However, its application to the design of catalysts is challenging as a result of a lack of understanding of the basic design principles in operation. To this end, it has now been demonstrated that a porous covalent organic framework material with a mesoporous aperture substantially promotes the transport ability of oxygen and consequently increases the catalytic activity of commercial Pt/C catalysts in a fuel cell.

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Ultra-Fine Grained Tungsten Heavy Alloy Prepared by High-Pressure Spark Plasma Sintering

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SSRN 2022年

作者： Zhang, Shuaihao Ji, Wei Zhu, Qiqi Li, Qiunan Wang, Weimin Fu, Zhengyi State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Hanjiang Hongyuan Xiangyang Silicon Carbide Special Ceramics Co. Ltd. Xiangyang441000 China

Tungsten heavy alloy (WHA) is an ideal material employed for kinetic energy penetrators due to its high density and excellent mechanical properties. However, it is difficult to obtain ultra-fine grained tungsten alloy with excellent properties by traditional powder metallurgy method because of severe grain growth at high sintering temperature with long soaking time. In this study, highly dense 93W-5.6Ni-1.4Fe (wt.%) WHA was successfully fabricated at low temperature of 950 °C with high pressure of 150 MPa by spark plasma sintering. The as-sintered tungsten alloy possesses high relative density (98.6%), ultra-fine grain size (271 nm) and high dislocation density (2.6×1016 m-2 ), which results in excellent properties such as high hardness (1079 HV1). © 2022, The Authors. All rights reserved.

关键词： Spark plasma sintering

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Machine Learning for Battery Research

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SSRN 2022年

作者： Zhao, Yan Wei, Zheng He, Qiu International School of Materials Science and Engineering State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Hubei430070 China The Institute of Technological Sciences Wuhan University Wuhan Hubei430072 China

Batteries are vital energy storage carriers in industry and in our daily life. There is continued interest in the developments of batteries with excellent service performance and safety. Traditional trial-and-error experimental approaches have the limitations of high-cost and low-efficiency. Atomistic computational simulations are relatively expensive and take long time to screen massive materials. The rapid development of machine learning (ML) has brought innovations in many fields and has also changed the paradigm of the battery research. Numerous ML applications have emerged in the battery community, such as novel materials discovery, property prediction, and characterization. In this review, we introduced the workflow of ML, where the task, data, feature engineering, and evaluation were involved. Several typical ML models used in batteries were highlighted. In addition, we summarized the applications of ML for the discovery of novel materials, and for property and battery state prediction. The challenges for the application of ML in batteries were also discussed. © 2022, The Authors. All rights reserved.

关键词： Machine learning

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