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SSRN 2022年

作者： Zhang, Chengtian Liu, Qian Zhu, Jiawei Wang, Hong Mu, Xueqin Zeng, Weihao Pu, Zonghua Wang, Pengyan Chen, Lei Yu, Jun Lin, Rui Mu, Shichun 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 School of Automotive Studies Tongji University Shanghai201804 China

Although anion-regulated PtxAy (A is anion, P, S, Se, Te, etc.) catalysts are promising in energy conversion applications, their facile synthesis is very challenging. Herein, we find a facile and general route to synthesize PtxAy-type nanocompounds by anion-regulated-engineering of nanostructural Pt. Taking PtP2 nanocrystals as sample, they can form by one-step phosphorization of Pt nanoparticles dispersed on carbon. PtP2 nanocrystals ~5 nm in size exhibit excellent hydrogen evolution/oxidation (HER/HOR) and oxygen reduction (ORR) reaction performance. In acidic media, it only requires a HER overpotential of 22 mV to reach the current density of 10 mA cm-2, with exceptional HOR and ORR mass activity, increased by 11.1% and 28.6% compared to Pt catalysts. Also, PtS, PtSe2 and PtTe2 nanocrystals are got by direct sulfuration, selenization, and telluration on nanostructural Pt, respectively, verifying generality of the facile anion-regulation strategy to build PtxAy-type nanocompounds and accessibility to industrial-scale synthesis of anion-regulated Pt catalysts. © 2022, The Authors. All rights reserved.

关键词： Nanocrystals

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Enhanced photocatalytic H_(2) production performance of CdS hollow spheres using C and Pt as bi-cocatalysts

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Chinese Journal of Catalysis 2021年第5期42卷 743-752页

作者： Shipeng Tang Yang Xia Jiajie Fan Bei Cheng Jiaguo Yu Wingkei Ho State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070HubeiChina School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001HenanChina Department of Science and Environmental Studies The Education University of Hong KongTai PoN.T.Hong Kong 999077China

Photocatalytic H2 production from water splitting is an effective method to solve energy crisis and environmental pollution ***,carbon@CdS composite hollow spheres(C@CdS-HS)are fabricated via a facile hydrothermal method using porous carbon hollow spheres(C-HS)as the *** C@CdS-HS shows an excellent photocatalytic H2-generation rate of 20.9 mmol h^(−1) g^(−1)(apparent quantum efficiency of 15.3%at 420 nm),with 1.0 wt%Pt as a cocatalyst under simulated sunlight irradiation;this rate is 69.7,13.9,and 3.9 times higher than that obtained with pure CdS hollow spheres(CdS-HS),C@CdS-HS,and CdS-HS/Pt,*** enhanced photocatalytic H_(2)-evolution activity of C@CdS-HS/Pt is due to the synergistic effect of C and Pt as the *** C-HS serves not only as an active site provider but also as an electron transporter and ***,C-HS has a strong photothermal effect that is induced by near infrared light,which kinetically accelerates the H_(2)-production ***,the underlying charge transfer pathway and process from CdS to C−HS is *** work highlights the potential application of C-HS-based nanocomposites in solar-to-chemical energy conversion.

关键词： CdS hollow sphere Carbon Platinum Bi-cocatalyst Synergistic effect Photocatalytic hydrogen production

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Ultrasonic-assisted soldering of 7075 Al alloy joint using Ni mesh reinforced SAC305 composite solder: microstructure, bonding ratio, and mechanical properties

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Ultrasonics Sonochemistry 2025年 120卷

作者： Dan Li Yong Xiao Yu Zhang Yu Zhao Jian Zhang Dan Luo School of Materials Science and Engineering Wuhan University of Technology Wuhan 430070 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China

Suppressing solder overflow has significant implications for promoting the application of ultrasonic-assisted soldering. In this work, an innovative strategy of adding metal mesh into Sn-based solder was utilized. 7075 Al alloy joints were ultrasonically soldered with Ni mesh reinforced SAC305 composite solders. The microstructure, bonding ratio, and shear properties of joints were systematically explored. Results showed that solder seams primarily consisted of Ni mesh, SAC305 solder, α-Al phase, Ag 3 Al 2 phase, (Ni, Cu) 3 Sn 4 phase, Al 3 (Ni, Cu) 2 phase, and dispersed fine particles. The bonding interface between Ni mesh and Al substrate could be divided into contact and non-contact regions. A polycrystalline Al 3 (Ni, Cu) 2 phase and a Cu-Al-O amorphous layer were formed at the contact regions. The bonding ratio of joints was mainly affected by the cavitation effects within non-contact regions. Adding Ni meshes could enhance the acoustic pressure and accelerate the flow of local solder in the solder seams. The decrease in the bonding ratio was attributed to the excessive solder flow, which induced the formation of defects. Benefiting from the intrinsic strengthening of Ni mesh and metallurgical reaction strengthening, Al/250#Ni-SAC/Al joints exhibited a shear strength of 71.87 MPa.

关键词： Ni mesh-SAC composite solder Ultrasonic-assisted soldering Bonding ratio of joints Acoustic pressure Acoustic streaming Shear properties

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A novel thermometric performance of Dy 3+ doped phosphor: fluorescence lifetime of grain boundary-doped MgAlON:Dy 3+ transparent ceramics

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Journal of Rare Earths 2025年

作者： Zhengyang Jing Bowen Chen Hao Wang Pan Gao Guangsheng Tu Bingtian Tu Weimin Wang Zhengyi Fu State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China Hubei Longzhong Laboratory Xiangyang 441000 China

The energy transfer (ET) between f-f transition is achieved by rare earth ions (RE 3+ ) doped grain boundaries of transparent ceramics, which enhances the fluorescence thermometry performance and enables multiple fluorescence thermometry modes of transparent ceramics. In this work, MgAlON:Dy 3+ transparent ceramics were prepared and segregation of Dy 3+ in grain boundaries was realized. With excellent absolute and relative sensitivities (2.447 μs/K and 2.09%/K), the fluorescence lifetime (FL) signals of MgAlON:Dy 3+ exceeds most of RE 3+ doped phosphors. The ET between closely segregated Dy 3+ in grain boundaries modifies the distribution of electron on 4 I 15/2 level, and induces temperature-dependent FL to the phosphors. This work reveals the influence of grain boundary segregation on ET between Dy 3+ for improving the fluorescence thermometry performance of phosphors.

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3D Nitrogen-Doped Graphene Encapsulated Metallic Nickel-Iron Alloy Nanoparticles for Efficient Bifunctional Oxygen Electrocatalysis

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CHEMISTRY-A EUROPEAN JOURNAL 2020年第18期26卷 3896-3896页

作者： Wang, Zhaoyang Liao, Xiaobin Lin, Zifeng Huang, Fuzhi Jiang, Yalong Owusu, Kwadwo Asare Xu, Lin Liu, Ziang Li, Jiantao Zhao, Yan Cheng, Yi-Bing Mai, Liqiang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing State Key Laboratory of Silicate Materials for Architectures Wuhan University of Technology Wuhan 430070 P. R. China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing State Key Laboratory of Silicate Materials for Architectures Wuhan University of Technology Wuhan 430070 P. R. China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing State Key Laboratory of Silicate Materials for Architectures Wuhan University of Technology Wuhan 430070 P. R. China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing State Key Laboratory of Silicate Materials for Architectures Wuhan University of Technology Wuhan 430070 P. R. China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing State Key Laboratory of Silicate Materials for Architectures Wuhan University of Technology Wuhan 430070 P. R. China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing State Key Laboratory of Silicate Materials for Architectures Wuhan University of Technology Wuhan 430070 P. R. China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing State Key Laboratory of Silicate Materials for Architectures Wuhan University of Technology Wuhan 430070 P. R. China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing State Key Laboratory of Silicate Materials for Architectures Wuhan University of Technology Wuhan 430070 P. R. China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing State Key Laboratory of Silicate Materials for Architectures Wuhan University of Technology Wuhan 430070 P. R. China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing State Key Laboratory of Silicate Materials for Architectures Wuhan University of Technology Wuhan 430070 P. R. China State Ke

Constructing high-efficient, low-cost and robust oxygen electrocatalyststoward rechargeable Zn-air batteries remains a big challenge. Herein, metallic Ni3Fe alloy nanoparticles encapsulated in 3D porous N-doped graphene aerogel was prepared through a facile hydrothermal assembly and calcination process. Inspired by the unique configuration and strong electronic interactions between Ni3Fe and N-doped graphene, Ni3Fe-GA(1)exhibited outstanding activity and stability for OER, ORR, and Zn-air batteries. More information can be found in the Full Paper by L. Xu, L. Mai, et al. (DOI:10.1002/chem.201904722).

关键词： 3D nitrogen-doped graphene aerogel bifunctional electrocatalyst interface engineering nanoparticles Zn-air batteries

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Adsorptive removal and catalytic performance of metal-organic frameworks containing mixed azolium-bipyridine ligand

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Resources Chemicals and materials 2022年第3期1卷 201-210页

作者： Nadia Gholampour Chizoba I.Ezugwu Shima Rahmdele Ali Ghanadzadeh Gilanie Francis Verpoort State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Department of Chemical Engineering University of AlcaláE-28871 Alcaláde HenaresMadridSpain Department of Chemistry Faculty of ScienceUniversity of GuilanRashtIran National Research Tomsk Polytechnic University Lenin Avenue 30634050 TomskRussian Federation Institute of Condensed Matter and Nanosciences Universit..catholique de LouvainPlace Louis Pasteur1348 Louvain-la-NeuveBelgium

Two ligands, 1, 3-bis(4-carboxyphenyl)imidazolium chloride and 4, 4-bipyridine, were employed to prepare nickel and zinc azolium based MOFs, Ni-MOF and Zn-MOF by the mixed ligand solvothermal approach. The positively charged azolium moieties in the imidazolium linker resulted in a charged environment in the as-synthesized frameworks. As a result, Ni-MOF and Zn-MOF demonstrated preferential adsorption of CO_(2) over methane molecules in the gas phase adsorption due to the higher quadruple moment of CO_(2), which interacts more with the positively charged frameworks. Besides, in aqueous media, Ni-MOF and Zn-MOF exhibited incredible adsorption efficiency for anionic dyes. In the following, Ni-MOF was metallated at the carbene site of the azolium linker to generate the novel heterogeneous catalyst Pd/Ni-MOF, which was successfully applied for Sonogashira and Suzuki-Miyaura coupling reactions without losing its activity after three cycles.

关键词： Azolium MOFs Dye adsorption Post modification Cross-coupling reactions

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In-situ preparation of TiO_(2)/N-doped graphene hollow sphere photocatalyst with enhanced photocatalytic CO_(2) reduction performance

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Chinese Journal of Catalysis 2021年第10期42卷 1648-1658页

作者： Libo Wang Bicheng Zhu Bei Cheng Jianjun Zhang Liuyang Zhang Jiaguo Yu State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070HubeiChina Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Xianhu Hydrogen ValleyFoshan 528200GuangdongChina Laboratory of Solar Fuel Faculty of Materials Science and ChemistryChina University of GeosciencesWuhan 430074HubeiChina School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001HenanChina

Photocatalytic CO_(2)conversion efficiency is hampered by the rapid recombination of photogenerated charge *** is effective to suppress the recombination by constructing cocatalysts on photocatalysts with high-quality interfacial ***,we develop a novel strategy to in-situ grow ultrathin/V-doped graphene(NG)layer on TiO_(2) hollow spheres(HS) with large area and intimate interfacial contact via a chemical vapor deposition(CVD).The optimized TiO^(2)/NG HS nanocomposite achieves total CO_(2)conversion rates(the sum yield of CO,CH_(3)OH and CH_(4))of 18.11μmol·g^(-1)h^(-1),which is about 4.6 times higher than blank T1O_(2)*** results demonstrate that intimate interfacial contact and abundant pyridinic N sites can effectively facilitate photogenerated charge carrier separation and transport,realizing enhanced photocatalytic CO_(2)reduction *** addition,this work provides an effective strategy for in-situ construction of graphene-based photocatalysts for highly efficient photocatalytic CO_(2)conversion.

关键词： Ultrathin N-doped graphene layer Chemical vapor deposition Intimate interfacial contact Photocatalytic CO_(2)reduction Pyridinic N site

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Defect Evolution and Effect on Structure and Electric Properties of A/B Site Sm Doped Batio3 Sintered in Different Atmospheres

SSRN

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SSRN 2022年

作者： Wang, Zhen Hao, Hua Peng, Feng Zhang, Wanying Su, Cong Guo, Qinghu Yao, Zhonghua Cao, Minghe Liu, Hanxing State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Material Science and Engineering International School of Material Science and Engineering Wuhan University of Technology Wuhan430070 China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Xianhu hydrogen Valley Foshan528200 China Center for Smart Materials and Device Integration

BaTiO3 ceramics doped with different contents of Sm (0.5-7 mol%) are prepared by a homogeneous precipitation method and sintered in air (A-xSm) and reducing (R-xSm) atmosphere respectively. With the increase of doping amount, the phase structure of Sm-doped BaTiO3 ceramics gradually changes from tetragonal phase to cubic phase, and the cubic phase is stronger in R-xSm. In the air atmosphere, Sm ions preferentially replace Ba sites as donors at low doping concentration, which is easy to convert Ti4+ ions into Ti3+ ions, resulting high dielectric constant (>104) and semiconductor like properties. As the doping amount increases, Sm ions start to replace Ti sites as acceptors to generate oxygen vacancies, which capture the electrons generated by donor doping, thus decreasing the percentage of Ti3+ ions. As a result, the dielectric loss and permittivity are decreased, and the electrical insulation properties of A-xSm ceramics are gradually improved. However, in the reducing atmosphere, oxygen atoms in the lattice are easy to escape, resulting in many oxygen vacancies and free electrons. The increase of oxygen vacancy inhibits the substitution of Sm ion to Ti site, and the free electron leads to the increase the percentage of Ti3+ ions and R-xSm ceramics exhibit semiconductor like properties. Thermally stimulated depolarization currents (TSDC) testing verified that oxygen vacancies of A-xSm ceramics mainly capture space charges, and a small part of oxygen vacancies form defective dipoles. The complex impedance test shows that the change of resistivity of A-xSm ceramics is mainly closed to the influence of Sm doping on the grain not grain boundary of BaTiO3 ceramic. © 2022, The Authors. All rights reserved.

关键词： Oxygen vacancies

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Membrane catalysts eliminate trace pollutants

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Chem 2022年第6期8卷 1551-1553页

作者： Jing Li Xiao-Yu Yang Hubei Province Key Laboratory of Coal Conversion and New Carbon Materials School of Chemistry and Chemical Engineering Wuhan University of Science and Technology Wuhan 430081 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & Shenzhen Research Institute & Joint Laboratory for Marine Advanced Materials in Pilot National Laboratory for Marine Science and Technology (Qingdao) Wuhan University of Technology 122 Luoshi Road Wuhan 430070 China School of Engineering and Applied Sciences Harvard University Cambridge MA 02138 USA

The presence of residues in products generated by high-efficiency catalytic reactions is detrimental. In a recent work published in Nature Nanotechnology by Andrea Schäfer and colleagues, membrane catalysts are shown to promote processes while enhancing water purification by degradation of micropollutants via filtration-driven effective collision.

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Calcium-Magnesium Phosphate Biphasic Microspheres with Nutrient Microchannels Promote Angiogenesis and Osteogenic Differentiation

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SSRN 2022年

作者： Hou, Wen Guo, Jiaxin Liu, Jiawei Zhao, Yanan Wei, Wenying Shu, Dan Dai, Honglian State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Biomedical Materials and Engineering Research Center of Hubei Province Wuhan University of Technology Wuhan430070 China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Xianhu Hydrogen Valley Foshan528200 China Shenzhen Research Institute of Wuhan University of Technology Shenzhen518000 China

Vascularisation and mineralisation are indispensable conditions for bone repair materials. The introduction of magnesium ions into calcium phosphate-based materials can give them angiogenic and mineralising capabilities. However, the optimum calcium to magnesium ratio has yet to be determined. Microspheres have received much attention from researchers due to their flexibility, non-agglomeration and other advantages. We prepared calcium-magnesium phosphate biphasic microspheres (CMBS) using the water-in-oil emulsion cross-linking method to achieve osteogenic differentiation and vascularisation. The simultaneous use of the sacrificial template method and heat treatment endow the microspheres with a rich micro-pore structure. In addition, we investigated the compounding ratio of calcium phosphate to magnesium phosphate and determined the optimal compounding ratio (Ca/Mg = 3/1-1/1) for this material. The prepared microspheres promoted the attachment, proliferation and directed differentiation of bone marrow mesenchymal stromal cells (BMSCs) and human umbilical vein cells (HUVECs). CMBS-I (Ca/Mg = 3/1) and CMBS-II (Ca/Mg = 1/1) microspheres showed the best promotion effect among all groups. These microspheres were implanted under the skin of Sprague- Dawley (SD) rats, and the composite microspheres significantly induced vascular regeneration compared to pure phase microspheres. © 2022, The Authors. All rights reserved.

关键词： Cell adhesion

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