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Intrinsic Mechanisms of Morphological Engineering and Carbon Doping for Improved Photocatalysis of 2D/2D Carbon Nitride Van Der Waals Heterojunction

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Energy & Environmental materials 2023年第3期6卷 96-106页

作者： Jinqiang Zhang Xiaoli Zhao Lin Chen Shuli Li Haijun Chen Yuezhao Zhu Shuaijun Wang Yang Liu Huayang Zhang Xiaoguang Duan Mingbo Wu Shaobin Wang Hongqi Sun School of Engineering Edith Cowan University270 Joondalup DriveJoondalupWA 6027Australia College of Chemical Engineering China University of Petroleum(East China) Qingdao 266580China Jiangsu Key Laboratory of Process Enhancement and New Energy Equipment Technology School of Mechanical and Power EngineeringNanjing Tech UniversityNanjing 211816China Center for Integrated Nanostructure Physics Institute for Basic Science(IBS)Sungkyunkwan UniversitySuwon 16419Republic of Korea School of Chemical Engineering and Advanced Materials The University of AdelaideAdelaide SA 5005Australia State Key Laboratory of Heavy Oil ProcessingInstitute of New EnergyCollege of Chemical EngineeringChina University of Petroleum(East China)Qingdao 266580China

Van der Waals(VDW)heterojunctions in a 2D/2D contact provide the highest area for the separation and transfer of charge *** this work,a top-down strategy with a gas erosion process was employed to fabricate a 2D/2D carbon nitride VDW heterojunction in carbon nitride(g-C_(3)N_(4))with carbon-rich carbon *** created 2D semiconducting channel in the VDW structure exhibits enhanced electric field exposure and radiation absorption,which facilitates the separation of the charge carriers and their ***,compared with bulk g-C_(3)N_(4)and its nanosheets,the photocatalytic performance of the fabricated carbon nitride VDW heterojunction in the water splitting reaction to hydrogen is improved by 8.6 and 3.3 times,respectively,while maintaining satisfactory ***,the finite element method(FEM)was employed to evaluate and clarify the contributions of the formation of VDW heterojunction to enhanced photocatalysis,in agreement quantitatively with experimental *** study provides a new and effective strategy for the modification and more insights to performance improvement on polymeric semiconductors in photocatalysis and energy conversion.

关键词： carbon nitride Van der Waals heterojunctions enhanced electric field exposure improved radiation absorption photocatalytic water splitting promoted dynamics of charge carriers

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Soluble Ultra-High Molecular Weight Poly(4,4′-Diphenylether-5,5′-Bibenzimidazole) Based Membranes with Remarkable Mechanical Strength and Specific Proton Conductivity for High Temperature Proton Exchange Membrane Fuel Cells

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SSRN 2023年

作者： Liu, Guoliang Wang, Ailian Ji, Wenxi Zhang, Longgui Wu, Jianing Zhang, Taoyi Tang, Haolin Zhang, Haining State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Nr. 122 Luoshi Rd. Wuhan430070 China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Foshan528200 China Research Institute of Chemical Industry Co. Ltd Beijing100013 China Hubei Key Laboratory of Fuel Cell Technology Wuhan University of Technology Wuhan430070 China

Reducing the thickness of membrane electrolyte is one important direction to improve Ohmic polarization and the according performance of high-temperature proton exchange membrane fuel cells for its widespread applications. Herein, we report that robust thin membranes can be formed using a soluble ether-contained poly(4,4′-diphenylether-5,5′-bibenzimidazole) with an ultra-high molecular weight of 170 kDa. Due to the enhanced chain entanglement of high molecular weight polymers, the formed thin membrane exhibits promising mechanical strength, thermal and oxidation stability. The optimized membrane with thickness of 61 µm and phosphoric acid uptake of 606 wt.% has the high specific proton conductivity of 25.9 S cm-2 at 160 oC under anhydrous conditions and mechanical strength of 11.2 MPa. The accordingly fabricated membrane electrode assembly delivers a peak power density of 0.544 W cm-2 with the open circuit voltage of 0.915 V at 160 oC using air as oxidant, outperforming the value of 0.522 W cm-2 for the commercial membrane electrode assembly with thickness of 250 µm and phosphoric acid uptake of 1018 wt.%. © 2023, The Authors. All rights reserved.

关键词： Proton conductivity

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Low Anisotropy and Excellent Energy Absorption of Additively Manufactured Porous Ti-6al-4v Alloy Consisting of Disordered Trapezo-Rhombic Dodecahedron Cell Structures

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SSRN 2024年

作者： Zhao, Rusheng Guo, Shiyue Zhang, Fan Zhang, Wen Yang, Dongsheng Yue, Xuezheng Guo, Xiangyu Tang, Huiling Liu, Yang Hubei Longzhong Laboratory Xiangyang441000 China Graduate School of Systems Design Tokyo Metropolitan University Tokyo1910065 Japan The State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China School of Mechanical Engineering Hunan University of Science and Technology Xiangtan411201 China School of Materials Science and Engineering University of Shanghai for Science and Technology Shanghai200082 China Wuhan University of Technology China

Additive manufacturing (AM) can fabricate porous metals with exceptional characteristics for lightweight structural applications and energy absorption. The mechanical properties of porous metals are determined by porosity, cell shape, cell size, and loading direction. In this study, porous Ti-6Al-4V samples with ordered and disordered cellular structures were manufactured using the laser powder bed fusion (L-PBF) process, and the anisotropic compression behavior under different regularities was systematically investigated. The results show that samples with ordered cellular structures exhibited higher compressive strength under z-axis compression but were prone to shear band formation under x- and y-axis compression, leading to a significant reduction in strength. As regularity decreased, shear bands gradually disappeared, and the samples exhibited more uniform plastic deformation. Notably, when the regularity coefficient R = 0.8, the samples showed the best overall mechanical performance in all directions, including the highest plastic collapse strength and energy absorption capacity. With decreasing regularity, the anisotropy of the porous structures also decreased. Additionally, when R = 0.4, the anisotropy of mechanical performance parameters was minimized;however, when R = 0.8, the overall performance of the mechanical parameters was optimal. These results indicate that effectively adjusting the regularity of the pore structure is key to achieving isotropy and optimizing overall mechanical performance. Compared to simply choosing ordered cells, adjusting the regularity of the cell structure can achieve excellent mechanical properties and reduce anisotropy, which is of significant value for lightweight structures and energy absorption applications. © 2024, The Authors. All rights reserved.

关键词： Anisotropy

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Theoretical Prediction of Two-Dimensional Fes2 Monolayer as Cathode Material for Lithium-Sulfur Battery

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SSRN 2023年

作者： Zhao, Fen-Ning Tang, Fu-Ling Xue, Hong-Tao Yao, Xiao-Jun State Key Laboratory of Advanced Processing and Recycling of Non-Ferrous Metals School of Materials Science and Engineering Lanzhou University of Technology Lanzhou University Lanzhou730050 China

As an emerging electrochemically active material, two-dimensional pyrite (2D-FeS2) with monolayer thickness, short ion diffusion paths, and a high specific surface area. Here, based on theoretical calculations, we predicted the possibility of 2D-FeS2 monolayer as a cathode material for Li-S batteries from three aspects: thermodynamics, electric, and electrochemical properties. It was found that the small exfoliation energy and interlayer binding energy made the 2D-FeS2 monolayer easier to form two-dimensional nano-layered structures. The DOS results show that it has higher conductivity, which effectively improves the mobility of Li+ and electrons. Furthermore, the dynamics simulation results indicated that it has good thermal stability. The nanolayers structure can enhance the anchoring effect of polysulfides and reduce the shuttle effect. The theoretical specific capacity of the 2D-FeS2 monolayer is as large as 446.96 mAh/g-1 and the lower Li+ diffusion barrier is 0.19 eV. The study suggested that 2D-FeS2 monolayer is a promising cathode material for Li-S batteries. Additionally, this work also deepens our understanding of 2D materials at the nanoscale. © 2023, The Authors. All rights reserved.

关键词： Sulfur compounds

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Innovation leading development:a glimpse into three-dimensional bioprinting in Israel

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Bio-Design and Manufacturing 2024年第3期7卷 358-382页

作者： Lujing Gao Zixuan Liu Daniel Dikovsky Jiqian Wang Deqing Mei Lihi Adler-Abramovich Ehud Gazit Kai Tao State Key Laboratory of Heavy Oil Processing and Centre for Bioengineering and Biotechnology College of Chemistry and Chemical EngineeringChina University of Petroleum(East China)Qingdao 266580China Future Science Research Institute Hangzhou Global Scientific and Technological Innovation CentreHangzhou 311200China Zhejiang-Israel Joint Laboratory of Self-Assembling Functional Materials Hangzhou 311200China Redefine Meat Ltd. Rehovot 7670110Israel State Key Laboratory of Fluid Power and Mechatronic Systems School of Mechanical EngineeringZhejiang UniversityHangzhou 310058China Key Laboratory of Advanced Manufacturing Technology of Zhejiang Province School of Mechanical EngineeringZhejiang UniversityHangzhou 310058China Department of Oral Biology The Maurice and Gabriela Goldschleger School of Dental MedicineFaculty of Medical&Health SciencesTel Aviv UniversityTel Aviv 6997801Israel The Center for Nanoscience and Nanotechnology Tel Aviv UniversityTel Aviv 6997801Israel Department of Materials Science and Engineering Iby and Aladar FleischmanTel Aviv UniversityTel Aviv 6997801Israel The Shmunis School of Biomedicine and Cancer Research George S.Wise Faculty of Life SciencesTel Aviv UniversityTel Aviv 6997801Israel

Three-dimensional(3D)printing has attracted increasing research interest as an emerging manufacturing technology for devel-oping sophisticated and exquisite architecture through hierarchical *** has also been employed in various advanced industrial *** development of intelligent biomedical engineering has raised the requirements for 3D printing,such as flexible manufacturing processes and technologies,biocompatible constituents,and alternative ***,state-of-the-art 3D printing mainly involves inorganics or polymers and generally focuses on traditional industrial fields,thus severely limiting applications demanding biocompatibility and *** this regard,peptide architectonics,which are self-assembled by programmed amino acid sequences that can be flexibly functionalized,have shown promising potential as bioinspired inks for 3D ***,the combination of 3D printing and peptide self-assembly poten-tially opens up an alternative avenue of 3D bioprinting for diverse advanced ***,a small but innovative nation,has significantly contributed to 3D bioprinting in terms of scientific studies,marketization,and peptide architectonics,including modulations and applications,and ranks as a leading area in the 3D bioprinting *** review summarizes the recent progress in 3D bioprinting in Israel,focusing on scientific studies on printable components,soft devices,and tissue *** paper further delves into the manufacture of industrial products,such as artificial meats and bioinspired supramolecular architectures,and the mechanisms,physicochemical properties,and applications of peptide ***,Israel contributes significantly to the field of 3D bioprinting and should thus be appropriately recognized.

关键词： Israel 3D bioprinting Biomanufacturing Peptide self-assembly Integration of industry,education and research

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利用电荷转移工程提高红色SrLa(Sc,Ga)O_(4):Ce^(3+)荧光粉的热稳定性

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Science China materials 2023年第5期66卷 1989-1996页

作者：杨至雨赵逸飞 Jumpei Ueda Maxim S.Molokeev 尚蒙蒙夏志国 State Key Laboratory of Luminescent Materials and Devices Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied TechniquesGuangdong Engineering Technology Research and Development Centre of Special Optical Fibre Materials and DevicesSchool of Materials Science and EngineeringSouth China University of TechnologyGuangzhou 510641China Department of Applied Physics The Hong Kong Polytechnic UniversityHong Kong 999077China Graduate School of Advanced Science and Technology Japan Advanced Institute of Science and Technology(JAIST)NomiIshikawa 923–1292Japan Laboratory of Crystal Physics Kirensky Institute of PhysicsFederal Research Center KSC SB RASKrasnoyarsk 660036Russia Department of Engineering Physics and Radioelectronic Siberian Federal UniversityKrasnoyarsk660041Russia Research and Development Department Kemerovo State UniversityKemerovo 650000Russia Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials(Ministry of Education) School of Materials Science and EngineeringShandong UniversityJinan 250061China School of Physics and Optoelectronics South China University of TechnologyGuangzhou 510641China

可被蓝光激发的高热稳定性红色荧光粉是制作高性能白光二极管(WLED)的关键材料.研究发现,Ce^(3+)掺杂的SrLaScO_(4)(SLO:Ce^(3+))荧光粉在440 nm激发下呈现峰值为640 nm的反常宽带红光发射.光谱学和结构分析证实Ce^(3+)离子在SLO中进入[... 详细信息

可被蓝光激发的高热稳定性红色荧光粉是制作高性能白光二极管(WLED)的关键材料.研究发现,Ce^(3+)掺杂的SrLaScO_(4)(SLO:Ce^(3+))荧光粉在440 nm激发下呈现峰值为640 nm的反常宽带红光发射.光谱学和结构分析证实Ce^(3+)离子在SLO中进入[LaO_(8)]多面体,产生强的晶体场劈裂和较大的Stokes位移,实现了比Eu^(2+)更低能量的红光发射.我们还设计并揭示了一种电荷转移相互作用的策略:在Sc^(3+)位置引入电负性较大的Ga^(3+),Ga^(3+)可以吸引更多邻位配合基团的电荷,以减少导带底部的电子占用而扩大带隙.Sc/Ga取代有效地抑制了热激活电离过程,使SrLa(Sc,Ga)O_(4):Ce^(3+)的热稳定性获得了显著提升,即在150℃的发光强度比(相对于20℃)从15%提升至31%.本研究为发现具有良好热稳定性的新型Ce^(3+)掺杂红色荧光粉提供了有效的设计原则.

关键词： Ce^(3+) thermal stability band gap broadband red luminescence

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In-situ grown CuO_(x)nanowire forest on copper foam:A 3D hierarchical and freestanding electrocatalyst with enhanced carbonaceous product selectivity in CO_(2)reduction

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Nano Research Energy 2022年第3期1卷 44-51页

作者： Wenjun Zhang Minghang Jiang Songyuan Yang Yi Hu Bin Mu Zuoxiu Tie Zhong Jin MOE Key Laboratory of Mesoscopic Chemistry MOE Key Laboratory of High Performance Polymer Materials and TechnologyJiangsu Key Laboratory of Advanced Organic MaterialsSchool of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources International Innovation Center for Forest Chemicals and MaterialsCollege of Chemical EngineeringNanjing Forestry UniversityNanjing 210037China Nanjing Tieming Energy Technology Co.Ltd. Nanjing 210093China Suzhou Tierui New Energy Technology Co.Ltd. Suzhou 215228China School for Engineering of Matter Transportand EnergyArizona State University501 East Tyler MallTempeAZ 85287USA

Electrocatalytic carbon dioxide(CO_(2))reduction is considered as an economical and environmentally friendly approach to neutralizing and recycling greenhouse gas CO_(2).However,the design of preeminent and robust electrocatalysts for CO_(2)electroreduction is still ***,we report the in-situ growth of dense CuO_(x)nanowire forest on 3D porous Cu foam(CuO_(x)-NWF@Cu-F),which can be directly applied as a freestanding and binder-free working electrode for highly effective electrocatalytic CO_(2)*** adjusting the surface morphology and chemical composition of CuO_(x)nanowires via surface reconstruction,large electrochemically active surface area and abundant Cu(+1)sites were generated,leading to remarkable activity for CO_(2)*** as-prepared hierarchical conductive electrode exhibited an enhanced Faradaic efficiency of 15.0%for ethanol formation(FE_(C_(2)H_(5)OH))and a total Faradaic efficiency of 69.4%for all carbonaceous compounds(FE_(C-total))at a mild applied potential of–0.45 V *** in 0.1 M KHCO_(3)*** achieved a 4-fold increase in FE_(C-total)than that of Cu nanowire forest supported on 3D porous Cu foam(Cu-NWF@Cu-F)obtained by in-situ reduction of the CuO_(x)-NWF@Cu-F via annealing at H_(2)atmosphere,and thereby effectively suppressed the hydrogen evolution side-reaction.

关键词： electrocatalytic CO_(2)reduction CuO_(x)nanowire forest 3D hierarchical nanostructure surface reconstruction enhanced carbonaceous product selectivity

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Hard Carbon with Embedded Graphitic Nanofibers for Fast-Charge Sodium-Ion Batteries

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SSRN 2024年

作者： Wang, Ke Li, Mengjun Zhu, Zhu Ai, Wei Wu, Han Wang, Bingwu He, Pan Xie, Dong Wu, Jinsong Huang, Wei Frontiers Science Center for Flexible Electronics Shaanxi Institute of Flexible Electronics Northwestern Polytechnical University Xi’an710072 China Nanostructure Research Center State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology 122 Luoshi Road Hubei Wuhan430070 China Nanjing University of Posts and Telecommunications China

关键词： Diffusion

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Energetic Mof-Derived Hollow Carbon Tubes with Interconnected Channels and Encapsulated Nickel-Cobalt Alloy Sites as Bifunctional Catalysts for Zn–Air Batteries with Stable Cycling Over 600 Cycles

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SSRN 2022年

作者： Duan, Xin-De Zhu, Jia-Wei Zheng, He-Gen State Key Laboratory of Coordination Chemistry School of Chemistry and Chemical Engineering Collaborative Innovation Center of Advanced Microstructures Nanjing University Jiangsu Nanjing210023 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Hubei Wuhan430070 China

Energetic metal–organic frameworks (EMOFs) and EMOF-derived materials are currently a hot spot to replace precious-metal electrocatalysts. Here, the reasonable strategy and synthesis of an inventive class of alloy@C materials from EMOFs via one-step pyrolysis is reported as the first example. The freshly progressive NiCo@C with a individual hierarchical structure, being composed of uniformly distributive metal alloy nanoparticles (MANPs) decorated by N-doped porous hollow carbon nanotubes (HCNTs), displays extraordinary bifunctional catalytic activities for oxygen reduction and oxygen evolution reactions (ORR and OER) than that of commercial precious-metal catalysts. Experimental characterizations and theoretical calculations reveal the vital role of Ni-Co alloy doping in adjusting both performances. Moreover, as an air electrode in Zn–air batteries, NiCo@C demonstrates a large peak power density of 170 mW cm−2 and superior long-term stability over 600 cycles. In consideration of the expansive category of EMOFs and the governable fixation of single/multiple metal particles, this strategy gives evidence of a capacious scientific range. © 2022, The Authors. All rights reserved.

关键词： Nickel alloys

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Providing Ceramics High-Temperature Self-Lubrication by Inducing Vacancies Concentration Variation Via Thermal and Frictional Synergies

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SSRN 2024年

作者： Li, Tao Lin, Pengyu Song, Junjie You, Xin Dong, Yaojun Sun, Qiuan Ding, Xue Zhang, Yongsheng Hu, Litian State Key Laboratory of Solidification Processing Center of Advanced Lubrication and Seal Materials Northwestern Polytechnical University Xi’an710072 China State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou730000 China Science and Technology on Space Physics Laboratory China Academy of Launch Vehicle Technology Beijing100076 China Shandong Laboratory of Advanced Materials and Green Manufacturing at Yantai Yantai264006 China

Based on the new conception of lattice low-shear stress induced by zero-dimensional point defects, the Al2O3 composite ceramics doped by TiO2 with good high-temperature tribological properties are prepared. According to the results, temperature could control the continuity of the resintering friction layer and the activation of the plastic deformation ability of ceramics. The lattice oxygen in TiO2 leaves the original lattice occupation due to thermal and frictional coupling action, and breaks away from the worn surface, which significantly increases the vacancy concentration level. Aforesaid structural defects are considered to be a crucial reason for the reduction of shear force. This vacancy quantitative change strategy of temperature-sensibility is expected to become a controllable method for providing lubrication during high-temperature. © 2024, The Authors. All rights reserved.

关键词： Titanium dioxide

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