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A green route for hydrogen production from alkaline thermal treatment(ATT)of biomass with carbon storage

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Carbon Resources Conversion 2023年第4期6卷 298-314页

作者： Guojie Liu Zexue Du Houfang Lu Jianli Zeng Kejing Wu Bin Liang School of Chemical Engineering Sichuan UniversityChengdu 610065China Engineering Research Center of Alternative Energy Materials&Devices Ministry of EducationSichuan UniversityChengdu 610065China State Key Laboratory of Catalytic Materials and Reaction Engineering Research Institute of Petroleum ProcessingSINOPECBeijing 100083China Institute of New Energy and Low-Carbon Technology Sichuan UniversityChengdu 610207China

Hydrogen,a green energy carrier,is one of the most promising energy ***,it is currently mainly produced from depleting fossil fuels with high carbon emissions,which has serious negative effects on the economy and *** address this issue,sustainable hydrogen production from bio-energy with carbon capture and storage(HyBECCS)is an ideal technology to reduce global carbon emissions while meeting energy *** review presents an overview of the latest progress in alkaline thermal treatment(ATT)of biomass for hydrogen production with carbon storage,especially focusing on the technical characteristics and related challenges from an industrial application ***,the roles of alkali and catalyst in the ATT process are critically discussed,and several aspects that have great influences on the ATT process,such as biomass types,reaction parameters,and reactors,are ***,the potential solutions to the general challenges and obstacles to the future industrial-scale application of ATT of biomass for hydrogen production are proposed.

关键词： Hydrogen BECCS Negative carbon emission Alkaline thermal treatment(ATT) Biomass

Tailoring Microstructure and Mechanical Property of Pure Tungsten Via Laser Powder Bed Fusion

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SSRN 2023年

作者： Xiong, Zhengang Ma, Wenyou Deng, Zhaoyang Yu, Chunfeng State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Institute of New Materials Guangdong Academy of Sciences Guangzhou510650 China

Microstructure tailoring is a fascinating project for material scientists that enables the mechanical properties of metallic parts to be customized. In this study, a series of laser parameter settings were implemented to manufacture dense tungsten parts and three laser travelling strategies were developed to tailor the microstructure via laser powder bed fusion (LPBF). A novel brick-stacking structure and interlocked S-shaped grains were observed in these dense samples. Among different strategy tungsten builds, typical indentation size effect (ISE) was found based on the indentation responses. As-measured indentation hardness could be thought of the sum of contribution from surface and volume. Although their ISE was similar, the contribution from plastically volume work varied, which could be primarily interpreted by rotation strategy. The rotation strategy significantly reduced the grain size and thermal stress during laser manufacturing, resulting in higher true hardness (~ 3.5 GPa). Additionally, the compression properties and associated fracture behavior of tungsten specimens manufactured by the different strategies were also compared. Therefore, these findings show that controlling laser travelling strategy during the LPBF process could be a powerful avenue to tailor the microstructure and performance of the customized components. © 2023, The Authors. All rights reserved.

关键词： Hardness

Large-scale data-driven and physics-based models offer insights into the relationships among the structures,dynamics,and functions of chromosomes

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Journal of Molecular Cell Biology 2023年第6期15卷 11-24页

作者： Cibo Feng Jin Wang Xiakun Chu Advanced Materials Thrust Function HubThe Hong Kong University of Science and Technology(Guangzhou)Guangzhou 511400China Green e Materials Laboratory The Hong Kong University of Science and Technology(Guangzhou)Guangzhou 511400China College of Physics Jilin UniversityChangchun 130012China Department of Chemistry and Physics The State University of New York at Stony BrookStony BrookNY 11794USA Division of Life Science The Hong Kong University of Science and TechnologyHong Kong SAR 999077China Guangzhou Municipal Key Laboratory of Materials Informatics The Hong Kong University of Science and Technology(Guangzhou)Guangzhou 511400China

The organized three-dimensional chromosome architecture in the cell nucleus provides scaffolding for precise regulation of gene *** the cell changes its identity in the cell-fate decision-making process,extensive rearrangements of chromo-some structures occur accompanied by large-scale adaptations of gene expression,underscoring the importance of chromosome dynamics in shaping genome *** the last two decades,rapid development of experimental methods has provided unprecedented data to characterize the hierarchical structures and dynamic properties of *** parallel,these enormous data offer valuable opportunities for developing quantitative computational ***,we review a variety of large-scale polymer models developed to investigate the structures and dynamics of *** from the underlying modeling strategies,these approaches can be classified into data-driven(‘top-down’)and physics-based(‘bottom-up’)*** discuss their contributions to offering valuable insights into the relationships among the structures,dynamics,and functions of chromosomes and propose the perspective of developing data integration approaches from different experimental technologies and multidisciplinary theoretical/simulation methods combined with different modeling strategies.

关键词： 4D genome data-driven model physics-based model structure-function relationships cell-fate decision struc-tural changes chromosome dynamics

在导电陶瓷基体中加入hBN薄片来创制材料性能的各向异性

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Science China materials 2023年第11期66卷 4317-4325页

作者：梁华岳邹冀刘晶晶顾熠涵季伟王子涵王为民傅正义 Hubei Longzhong Laboratory Wuhan University of Technology Xiangyang Demonstration ZoneXiangyang 441000China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China School of Materials Science and Engineering Wuhan University of TechnologyWuhan 430070China Jingdezhen Huaxun Special Ceramics Co. Ltd.Jingdezhen 333000China

导电陶瓷的物理性能由连续的导电基体所决定,调控困难.在这项研究中,通过在陶瓷基体中引入hBN薄片,成功实现了导电陶瓷力学和物理性能各向异性的调控.以包含TiN、Al、硼和hBN的混合粉末为原料,通过放电等离子烧结制备了两种hBN含量不同... 详细信息

导电陶瓷的物理性能由连续的导电基体所决定,调控困难.在这项研究中,通过在陶瓷基体中引入hBN薄片,成功实现了导电陶瓷力学和物理性能各向异性的调控.以包含TiN、Al、硼和hBN的混合粉末为原料,通过放电等离子烧结制备了两种hBN含量不同的导电TiB_(2)-AlNhBN陶瓷.在垂直于烧结压力的方向上,TiB_(2)-AlN-60vol%hBN陶瓷在室温下的弯曲强度、断裂韧性、电导率和热导率分别为151±6.34MPa、2.62±0.31MPam^(1/2)、5.3×10^(5)S m^(−1)和77.87Wm^(-1)K^(-1).而在平行于烧结压力的方向上,室温电导率和热导率分别降低到2.0×10^(5)S m^(−1)和32.25Wm^(-1)K^(-1).这些差异是通过在导电基体中加入少量额外排列的hBN薄片而产生的,为材料选择和设计提供了新的机会.

关键词： hexagonal boron nitride texture microstructure mechanical property physical property

Microstructure and Ablation Behaviour of C/C-Sic-Zrc-Cu Composites Prepared by Reactive Melt Infiltration

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SSRN 2024年

作者： Wang, Shuai Yin, Jian Xiefeng, Minyu Tang, Lei Xiong, Xiang Zhang, Hongbo Wen, Qingbo Ma, Denghao Tianshan, Jinglv Zuo, Jinglv State Key Laboratory of Powder Metallurgy Central South University Changsha410083 China Aerospace Research Institute of Materials & Processing Technology Key Laboratory of Advanced Functional Composite Materials Technology Beijing100076 China Hunan Boyun New Materials CO.LTD Changsha410083 China

To satisfy the requirements for the new generation solid rocket motors on highly ablation-resistant throat materials, an idea of merging passive and active thermal protection was applied to modify carbon/carbon composites. In this study, SiC and ZrC were used as passive thermal protection materials along with the active thermal protection material Cu to modify the C/C composites. C/C-SiC-ZrC-Cu composites were prepared by two-step reactive melt infiltration, which involved the infiltration of Si/Zr followed by Cu/Ti. The Cu content of the C/C-SiC-ZrC composites was controlled by controlling the open porosity of the porous C/C-SiC-ZrC composites. Microstructure, composition and ablation resistance of the C/C-SiC-ZrC-Cu composites were investigated. The results showed that the composites with high Cu content and density exhibited excellent short-term ablation resistance under the 42kW plasma flame, with a negative linear ablation rate after 20s of ablation. The active heat dissipation of Cu during the ablation process results in a significant reduction of the thermal response temperature on the composite surface. Moreover, the generated Si-Ti-Zr-O layer could form an effective barrier to protect the matrix. © 2024, The Authors. All rights reserved.

关键词： Microstructure

Ag-Decorated Pp Nonwoven for Excellent Catalytic Reduction of 4-Nitrophenol and Antibacterial Study

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SSRN 2023年

作者： Xiao, Shili Cheng, Hongbin Han, Niudong Bai, Zhikui Li, Zhujun Xu, Weilin School of Textile Science and Engineering Wuhan Textile University Wuhan430200 China State Key Laboratory of New Textile Materials & Advanced Processing Technology Wuhan430200 China Key Laboratory of Eco-textiles Ministry of Education Jiangnan University Wuxi214112 China College of Textiles Guangdong Polytechnic Guangzhou528041 China

Silver particles have been frequently coated on the surface of substrates with the assistance of polydopamine due to their important catalytic and bacterial properties. However, the polydopamine layer was not compact and the resulted particles on the substrates were easy to leak during the application process, especially in the aqueous environment. For mediating this, we coated Ag particles on the surface of polypropylene (PP) nonwoven fabric by codeposition of catechol and polyethyleneimine, with subsequent crosslinking by glutaraldehyde. The formation of Ag particles on PP nonwoven fabric surface was systematically characterized using SEM, EDS and elemental mapping, TEM, FTIR, XRD and TG. Batch experiment showed that Ag@PP nonwoven fabric could effectively degrade the model pollutant 4-nitrophenol in the presence of reduction agent NaBH4 with 100% degradation efficiency. The adsorption isotherm was assessed and displayed that the sorption of 4-nitrophenol on reactive Ag@PP nonwoven fabric followed the Freundlich model. The Ag@PP nonwoven fabric was easy to be recycled and could maintained 100% degradation efficiency after six cycles. The degradation process was monitored using HPLC/MS and the possible degradation mechanism was proposed. In addition, the Ag@PP nonwoven fabric showed excellent antibacterial activity against E. coli. Overall, the material fabricated in this work would be a reusable catalyst for water purification and disinfection. © 2023, The Authors. All rights reserved.

关键词： Efficiency

Two-Dimensional Heterostructure Nifep@Feooh Nanosheets Supported by Nickel Foam as High-Performance Oer Electrocatalyst

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SSRN 2023年

作者： Jiang, Zhigang Wang, Kuikui Chen, Mengtian Hou, Qinglong Wang, Chen Yang, Shuhan Liu, Haizhen Institute of Materials for Energy and Environment Laboratory of New Fiber Materials and Modern Textile Growing Basis for State Key Laboratory College of Materials Science and Engineering Qingdao University Qingdao266071 China MOE Key Laboratory of New Processing Technology for Non-ferrous Metals and Materials Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials Guangxi University Guangxi Nanning530004 China

Constructing heterostructure is an efficient strategy to develop high-performance electrocatalysts. Herein, two-dimensional heterostructure NiFeP@FeOOH nanosheets supported by nickel foam are equipped by hydrothermal-phosphorization-electrodeposition processes. The findings indicate that in 1.0 M KOH alkaline solution, NiFeP@FeOOH/NF showed an OER overpotential of 235 mV at 100 mA cm-2, a Tafel slope of 75.85 mV dec-1 and worked stably at 50 mA cm-2 for 80 h. The synthesis of self-supporting heterostructure NiFeP@FeOOH nanosheets on the NF can increase the electron transfer rate, increase the specific surface region, and boost the rate at which produced bubbles are released from the electrode. Additionally, the incorporation of FeOOH into NiFeP nanosheets can provide sufficient active sites for the reaction, favor the form of intermediates containing oxygen (hydroxyl oxides), and promote water splitting. The NiFeP@FeOOH/NF electrocatalytic activity is significantly improved. This research proves the importance of constructing heterostructure and introducing FeOOH are of great significance to the study of the properties of OER electrocatalysts. © 2023, The Authors. All rights reserved.

关键词： Nanosheets

High-efficiency electrocatalytic NO reduction to NH_(3) by nanoporous VN

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Nano Research Energy 2022年第2期1卷 201-207页

作者： Defeng Qi Fang Lv Tianran Wei Mengmeng Jin Ge Meng Shusheng Zhang Qian Liu Wenxian Liu Dui Ma Mohamed SHamdy Jun Luo Xijun Liu MOE Key Laboratory of New Processing Technology for Non-Ferrous Metals and Materials and Guangxi Key Laboratory of Processing for Non-Ferrous Metals and Featured MaterialsSchool of ResourceEnvironments and MaterialsGuangxi UniversityNanning 530004China Institute for New Energy Materials and Low-Carbon Technologies Tianjin Key Lab for Photoelectric Materials&DevicesSchool of Materials Science and EngineeringTianjin University of TechnologyTianjin 300384China Key Laboratory of Carbon Materials of Zhejiang Province College of Chemistry and Materials EngineeringWenzhou UniversityWenzhou 325035China College of Chemistry Zhengzhou UniversityZhengzhou 450000China Institute for Advanced Study Chengdu UniversityChengdu 610106China College of Materials Science and Engineering Zhejiang University of TechnologyHangzhou 310014China Catalysis Research Group(CRG) Department of ChemistryCollege of ScienceKing Khalid UniversityP.O.Box 900461413 AbhaSaudi Arabia

Electrocatalytic NO reduction reaction to generate NH_(3)under ambient conditions offers an attractive alternative to the energy-extensive Haber-Bosch route;however,the challenge still lies in the development of cost-effective and high-performance ***,nanoporous VN film is first designed as a highly selective and stable electrocatalyst for catalyzing reduction of NO to NH_(3)with a maximal Faradaic efficiency of 85%and a peak yield rate of 1.05×10^(-7)mol·cm^(-2)·s^(-1)(corresponding to 5,140.8mg·h^(-1)·mg_(cat).^(-1))at-0.6 V *** hydrogen electrode in acid ***,this catalyst maintains an excellent activity with negligible current density and NH_(3)yield rate decays over 40 ***,as a proof-of-concept of Zn-NO battery,it delivers a high power density of 2.0 mW·cm^(-2)and a large NH_(3)yield rate of 0.22×10^(-7)mol·cm^(-2)·s^(-1)(corresponding to 1,077.1mg·h^(-1)·mg_(cat).^(-1)),both of which are comparable to the best-reported *** analyses confirm that the VN surface favors the activation and hydrogenation of NO by suppressing the hydrogen *** work highlights that the electrochemical NO reduction is an eco-friendly and energy-efficient strategy to produce NH_(3).

关键词： NH_(3)electrosynthesis green route nanoporous VN NO reduction reaction high-performance

Sintering, high-temperature stability, and thermal conductivity of (Zr, Nb, Hf, Ta)(C, N) high-entropy carbonitrides

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Ceramics International 2025年

作者： Bai, Yang Liang, Yuxin Bi, Juan Cui, Baoning Lu, Zhaopeng Wang, Huangxuan You, Xixi Li, Bangsheng School of Materials Science and Engineering Harbin Institute of Technology Harbin150001 China State Key Laboratory of Advanced Welding and Joining Harbin Institute of Technology Harbin150001 China National Key Laboratory for Precision Hot Processing of Metals Harbin Institute of Technology Harbin150001 China

High-entropy carbonitrides (HECNs), a new class of high-performance ceramics, hold great potential for high-temperature structural materials and thermal protection systems due to their excellent thermal stability and properties. For its better application, it is important to optimize the sintering temperature of HECNs and deeply investigate its thermal conductivity behavior. This study systematically investigates the thermodynamic stability, formation ability, and thermal properties of (ZrHfNbTa)CxN1-x through first-principles calculations and experimental validation. Thermodynamic calculations reveal that nitrogen incorporation reduces the sintering temperature required to achieve a stable high-entropy solid solution. Experimental validation by spark plasma sintering (SPS) shows that the sintering temperature can be reduced from 1950 °C to 1700 °C. Ab initio molecular dynamics (AIMD) simulations demonstrate that HECNs retain structural integrity at 1773 K. Thermal conductivity tests show an increase with temperature, but a decrease with higher nitrogen content, which is mainly caused by the increased scattering of phonons resulting from lattice distortions. The Debye-Callaway model fitting further elucidates the underlying thermal conductivity mechanisms. In summary, nitrogen incorporation enhances the thermodynamic stability and reduces thermal conductivity of HECN ceramics, providing valuable theoretical and experimental support for their application in high-temperature structural materials and thermal protection systems. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Carbon nitride