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Facile Oxygen-promoted synthesis of Cu,N Co-doped Carbon Composites for Oxygen Reduction

Journal of Wuhan University of technology(materials Science) 2021年第6期36卷 796-803页

作者： LIU Qianqian GUO Wei PAN Mu TU Wenmao Hubei Key Laboratory of Fuel Cell Wuhan University of TechnologyWuhan 430070China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China

A new strategy to fabricate oxygen-promoted Cu,N co-doped carbon(OP-CuN@C)composites is *** strategy consists of only two simple steps:chemical polymerization and high temperature *** measurements were conducted to investigate the catalytic activity and mechanism of ORR on the resulting *** the electrochemical results indicate that OP-CuN@C exhibits the best ORR catalytic *** ORR onset potential of OP-CuN@C is slightly lower than that of commercial Pt/C *** good performance is attributed to the large specific surface area,high content of heteroatoms(pyridinic,graphitic nitrogen,and oxygen atom)and synergistic effect between divalent copper and nitrogen dopant.

关键词： oxygen reduction reaction oxygen promotion OP-CuN@C chemical polymerization approach high temperature carbonized method

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Additive Manufacturing of Lunar Regolith via Resin-based Binder and Material Extrusion Method for High-Performance In-Space Manufacturing on the Moon

Additive Manufacturing of Lunar Regolith via Resin-based Bin...

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2024 IAF Microgravity Sciences and Processes Symposium at the 75th International Astronautical Congress, IAC 2024

作者： Wang, Tongcai Gu, Guangshuai Zhang, Rihan Wang, Gong Technology and Engineering Center of Space Utilization Chinese Academy of Sciences Beijing100094 China University of Chinese Academy of Sciences Beijing101408 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing International School of Materials Science and Engineering Wuhan University of Technology Wuhan430070 China

ISBN: (纸本)9798331312077

The utilization of lunar regolith for construction on the lunar surface has become a critical challenge in the field of in-situ resource utilization. This study proposes a lunar regolith manufacturing method using a high-performance resin binder, which is characterized by high regolith content and forming strength. A combined resin material with both thermosetting and photosetting properties was developed and mixed with lunar regolith to create a regolith slurry. This slurry can be directly molded or additively extruded into green bodies with specific structures. These green bodies can self-cure under the high temperatures and ultraviolet radiation present during the lunar daytime, thereby reducing energy requirements and meeting the demands of lunar construction. The study thoroughly examines the material forming processes, investigating the effects of various additive types and contents, regolith mass ratios, and process parameters on the properties of the slurry and the formed specimens. The mechanical performance and microstructure of the formed samples were also analyzed. The lunar regolith mass ratio reached up to 90 wt.%, with the highest compressive strengths exceeding 60 MPa for cast specimens and 30 MPa for printed samples. This technology shows significant potential for contributing to in-situ lunar regolith-based construction in future lunar missions. Copyright © 2024 by the International Astronautical Federation (IAF). All rights reserved.

关键词： Compressive strength

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Preparation of Bi_(2)O_(3)/BiOI Step-scheme Heterojunction Photocatalysts and Their Degradation Mechanism of Methylene Blue

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Journal of Wuhan University of technology(materials Science) 2022年第5期37卷 801-806页

作者： JIANG Xuechao TAN Haiyan SHI Xinyu CHENG Xinhua HU Weibing HU Xinhui Key Laboratory of Green Manufacturing of Super-light Elastomer Materials of State Ethnic Affairs Commission School of Chemistry and Environmental EngineeringHubei Minzu UniversityEnshi445000China Guangxi Key Laboratory of Chemistry and Engineering of Forest Products Guangxi University for NationalitiesNanning530006China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan430070China

Bi_(2)O_(3)/BiOI step-scheme(S-scheme) heterojunction photocatalyst was synthesized by green calcination method, its degradation ability of methylene blue was investigated, and the photocatalytic performance of the Bi_(2)O_(3)/BiOI heterojunction, Bi_(2)O_(3) and BiOI was compared. The structure and morphology of the samples were characterized by X-ray diffraction(XRD), field emission scanning electron microscopy(FESEM), and UV-vis diffuse reflection spectrum (UV-vis DRS). The degradation rate of methylene blue was analysised by spectrophotometry, and the calculation result showed that the degradation rate of methylene blue was 97.8% in 150 minutes. The first order kinetic rate constant of 10%Bi_(2)O_(3)/BiOI is 0.021 8 min^(-1), which are2.37 and 2.68 times of BiOI(0.009 18 min^(-1)) and Bi_(2)O_(3) (0.008 03 min^(-1)) respectively. The calculation result shows that the work function of Bi_(2)O_(3) and BiOI are 3.0 e V and 6.0 e V, respectively, by density functional theory(DFT). When this S-scheme heterojunction is used as a photocatalyst, the weaker electrons in the conduction band of BiOI will be combined with the weaker holes in the Bi_(2)O_(3) valence band under combined effect with built-in electric field and band bending, which will retain stronger photoelectrons and holes between Bi_(2)O_(3) and BiOI. This may be the internal reason for the efficient degradation of tetracycline by Bi_(2)O_(3)/BiOI S-scheme heterostructures.

关键词： step-scheme heterojunction methylene blue antibiotic wastewater treatment photocatalytic degradation charge separation

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Structural features and thermoelectric performance of Sb- and Bi-doped Cu_(2)SnSe_(3) compounds

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Rare Metals 2021年第9期40卷 2474-2485页

作者： Shu-Ping Deng Xian-Yan Jiang Li-Li Chen Zi-Ye Zhang Ning Qi Yi-Chu Wu Xin-Feng Tang Zhi-Quan Chen School of Physics and Technology Hubei Key Laboratory of Nuclear Solid State PhysicsWuhan UniversityWuhan 430072China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China

In this paper, a series of Sb-doped and Bi-doped Cu_(2)Sn_(1-x)M_(x)Se_(3) samples(M = Sb, Bi) are prepared by vacuum melting combined with the spark plasma sintering process. The effects of different atomic doping amounts on their properties are discussed. Structural studies indicate that all obtained samples comprise a single Cu_(2)SnSe_(3) phase. Sb and Bi atoms are experimentally demonstrated to be efficient cation dopants for increasing the transport performance. Compared with that doping on the cation site,Bi doping is much more efficient in increasing the electron concentration of the Cu_(2)SnSe_(3) system. Ultimately, a high figure of merit of 0.36 is achieved in the Cu_(2)Sn_(0.94)Sb_(0.06) Se_(3) sample at 773 K due to the enhanced power factor and lowered lattice thermal conductivity,which are 1.73 times higher than those of the pure *** results provide an efficient approach to enhance thermoelectric performance via other doping atoms, which could also be applied to copper-based chalcogenide materials.

关键词： Thermoelectric properties Positron annihilation spectroscopy Ternary copper chalcogenide Structure features Doping Polycrystalline

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Poly(dopamine)-assisted Bioactive Coating on the Surface of Porous Poly (Ether Ether Ketone) to Promote Osteogenic Differentiation of rBMSC

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Journal of Wuhan University of technology(materials Science) 2021年第5期36卷 766-776页

作者： WANG Jin WANG Youfa WU Qingzhi State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Biomedical Material and Engineering Center of Hubei ProvinceWuhan University of TechnologyWuhan 430070China

A facile modification strategy is developed to promote the proliferation and osteogenic differentiation of rat bone marrow stromal cells(rBMSCs)through deposition of a bioactive calcium silicate(CS)coating on the porous surface of poly(ether-ether-ketone)(PEEK)with the assistance of poly(dopamine)(PDA).The porous structures are etched on the surface of PEEK after sulfonation treatment.A poly(dopamine)layer is coated on the porous surface of the sulfonated PEEK(SPEEK),which provides anchoring groups for the subsequent deposition of the CS *** show that the CS coating on the porous surface of SPEEK significantly improve the hydrophilicity and biomineralization formation of *** with PEEK,SPEEK-PDA-CS displays higher bioactivity to promote the proliferation and osteogenic differentiation of rBMSCs,including the increase of ALP activity and formation of calcium nodules,the expression of osteogenic differentiation-related *** results are beneficial to extending clinical applications of PEEK-based implants for bone tissue repair and orthopedic surgery.

关键词： poly(ether-ether-ketone) calcium silicate poly(dopamine) bioactivity osteogenic differentiation

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Slow Photon-Enhanced Heterojunction Accelerates Photocatalytic Hydrogen Evolution Reaction to Unprecedented Rates

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CCS Chemistry 2023年第2期5卷 372-384页

作者： Jing Liu Yin-Hao Guo Zhi-Yi Hu Heng Zhao Ze-Chuan Yu Lihua Chen Yu Li Gustaaf Van Tendeloo Bao-Lian Su State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology430070 Wuhan Nanostructure Research Centre(NRC) Wuhan University of Technology430070 Wuhan School of Civil Engineering and Architecture Wuhan University of Technology430070 Wuhan EMAT University of AntwerpB-2020 Antwerp Laboratory of Inorganic Materials Chemistry(CMI) University of NamurB-5000 Namur

In photocatalysis,both the photogenerated charge separation and transport and the induced light utilization greatly influence *** this work,highly ordered CdS@ZnO core-shell inverse opal(CdS@ZnO-csIO)nanocomposites have been successfully designed as a model to couple the heterojunction system with the slow photon effect for photocatalytic H2 *** calculations and experimentation provide direct evidence for the slow photon effect in the CdS@ZnO-csIO *** type II heterojunction is responsible for promoting the migration and separation of photogenerated charges,and the slow photon effect is in charge of enhancing light harvesting in the CdS@ZnO-csIO *** synergy of two functions gives rise to a significantly enhanced photocatalytic H2 production rate under simulated solar light for the CdS@ZnO-csIO *** highest H2 production rate reaches 48.7 mmol g^(−1)h^(−1)under simulated solar light with the benchmark performance for all reported CdS@ZnO *** work provides proof-of-principle that coupling the heterojunction system with the slow photon effect can greatly enhance the photocatalytic activity of composite photocatalysts.

关键词： type II heterojunction slow photon effect CdS@ZnO nanocomposites 3D core-shell inverse opal nanocomposites photocatalytic H2 production

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Aqueous batteries:from laboratory to market

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国家科学评论（英文版） 2023年第11期10卷 85-88页

作者： Xikun Zhang Pengcheng Xing Thomas L.Madanu Jing Li Jie Shu Bao-Lian Su Laboratory of Inorganic Materials Chemistry(CMI) University of NamurBelgium School of Materials Science and Chemical Engineering Ningbo UniversityChina Laboratory of Inorganic Materials Chemistry(CMI) University of NamurBelgium State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyChina

As estimated up to 2022,global installed capacity of lithium-ion batteries(LIBs)has increased dramatically from 148 to 580 GWh in the past five *** wide range of applications is mainly at-tributed to their high energy density,ex-cellent cycle life,and low self-discharge rate[1].However,with the continuous promotion of the applications in various fields,the limitations of LIBs have be-come apparent,such as high cost and safety issues.

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Density Functional Theory for Electrocatalysis

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Energy & Environmental materials 2022年第1期5卷 157-185页

作者： Xiaobin Liao Ruihu Lu Lixue Xia Qian Liu Huan Wang Kristin Zhao Zhaoyang Wang Yan Zhao State Key Laboratory of Silicate Materials for Architectures International School of Materials Science and EngineeringWuhan University of TechnologyWuhan 430070China Zhejiang University Hangzhou 310058China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Center of Smart Materials and DevicesSchool of Materials Science and EngineeringWuhan University of TechnologyWuhan 430070China Lynbrook High School San Jose CA 95129USA The Institute of Technological Sciences Wuhan UniversityWuhan 430072China

It is a considerably promising strategy to produce fuels and high-value chemicals through an electrochemical conversion process in the green and sustainable energy *** for electrocatalytic reactions,including hydrogen evolution reaction(HER),oxygen evolution reaction(OER),oxygen reduction reaction(ORR),nitrogen reduction reaction(NRR),carbon dioxide reduction reaction(CO_(2)RR),play a significant role in the advanced energy conversion technologies,such as water splitting devices,fuel cells,and rechargeable metal-air *** low-cost and highly efficient electrocatalysts is closely related to establishing the composition-structure-activity relationships and fundamental understanding of catalytic *** functional theory(DFT)is emerging as an important computational tool that can provide insights into the relationship between the electrochemical performances and physical/chemical properties of *** article presents a review on the progress of the DFT,and the computational simulations,within the framework of DFT,for the electrocatalytic processes,as well as the computational designs and virtual screenings of new *** useful descriptors and analysis tools for evaluating the electrocatalytic performances are highlighted,including formation energies,d-band model,scaling relation,egorbital occupation,and free energies of ***,the remaining questions and perspectives for the development of DFT for electrocatalysis are also proposed.

关键词： analysis tools density functional theory descriptors electrocatalysis

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Nurturing the marriages of single atoms with atomic clusters and nanoparticles for better heterogeneous electrocatalysis

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Interdisciplinary materials 2022年第1期1卷 51-87页

作者： Lei Zhang Jiawei Zhu Xin Li Shichun Mu Francis Verpoort Junmin Xue Zongkui Kou John Wang Department of Materials Science and Engineering National University of SingaporeSingaporeSingapore State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhanChina School of Physical&Mathematical Sciences Nanyang Technological UniversitySingaporeSingapore

Single-atom catalysts,featuring some of the most unique activities,selectivity,and high metal utilization,have been extensively studied over the past *** their high activity,selectivity,especially towards small molecules or key intermediate conversions,they can be synergized together with other active species(typically other single atoms,atomic clusters,or nanoparticles)in either tandem or parallel or both,leading to much better performance in complex catalytic *** there have been reports on effectively combining the multiple components into one single catalytic entity,the combination and synergy between single atoms and other active species have not been reviewed and examined in a systematic ***,in this overview,the key synergistic interactions,binary complementary effects,and the bifunctional functions of single atoms with other active species are defined and discussed in *** integration functions of their marriages are in-vestigated with particular emphasis on the homogeneous and heterogeneous combinations,spatial distribution,synthetic strategies,and the thus-derived outstanding catalytic performance,together with new light shined on the catalytic mechanisms by zooming in several case *** dynamic nature of each of the active species and in particular their interactions in such new catalytic entities in the heterogeneous electrocatalytic processes are visited,on the basis of the in situ/operando ***,we feature the current chal-lenges and future perspectives of these integrated catalytic entities that can offer guidance for advanced catalyst design by the rational combination and synergy of binary or multiple active species.

关键词： atomic clusters binary/multiple synergy heterogeneous catalysis nanoparticles single atoms

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Confined nanospace for enhanced photocatalysis

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国家科学评论（英文版） 2021年第3期8卷 3-4页

作者： Bao-Lian Su State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyChina Laboratory of Inorganic Materials Chemistry(CMI) University of NamurBelgium

The world today is very different from how it *** consumption rate of fos-sil fuels compared with the available re-sources and the calamity of global warm-ing frighten *** entire planet is at risk,but these are our *** is the cause and so mankind should find sustainable and green energy solutions to satisfy the needs of society.

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