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synthesis of highly sinterable MgO powders for IR transparent ceramics

Ceramics International 2025年第18期51卷 26696-26701页

作者： Zhi, Yongli Mei, Bingchu Li, Weiwei Cheng, Jing Luo, Peng State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Jianghuai Advance Technology Center Hefei230000 China

MgO transparent ceramics (TCS) have attracted great interests in the field of infrared window materials due to its wide transmission range, excellent thermal conductivity, and balanced mechanical properties. To date, research on MgO transparent ceramics predominantly relies on commercial MgO powders by spark plasma sintering (SPS). Herein, we report highly sinterable MgO powders synthesized by co-precipitation method, which exhibits pure phase and particle size of 75 nm. When sintered at 950 °C under 45 MPa for 2 h by hot pressed (HP) method, the transmittance of the MgO ceramic sample with the thickness of 2 mm achieved 76.9 % at 0.4 μm and 88.3 % at 5 μm. These optical properties are comparable to or even superior to MgO TCS produced through SPS method. This work shows that the MgO particles synthesized via the co-precipitation method are suitable for producing high optical quality of MgO infrared (IR) transparent ceramics. © 2025

关键词： Thermal conductivity

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Defect chemistry engineering of Ga-doped garnet electrolyte with high stability for solid-state lithium metal batteries

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Chinese Physics B 2024年第8期33卷 560-567页

作者：陈思汗黎俊刘可可孙笑晨万京伟翟慧宇唐新峰谭刚健 State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China International School of Materials Science&Engineering Wuhan University of TechnologyWuhan 430070China

Ga-doped Li_(7)La_(3)Zr_(2)O_(12)(Ga-LLZO)has long been considered as a promising garnet-type electrolyte candidate for all-solid-state lithium metal batteries(ASSLBs)due to its high room temperature ionic ***,the typical synthesis of Ga-LLZO is usually accompanied by the formation of undesired LiGaO_(2) impurity phase that causes severe instability of the electrolyte in contact with molten Li metal during half/full cell *** this study,we show that by simply engineering the defect chemistry of Ga-LLZO,namely,the lithium deficiency level,LiGaO_(2) impurity phase is effectively inhibited in the final synthetic ***,defect chemistry engineered Ga-LLZO exhibits excellent electrochemical stability against lithium metal,while its high room temperature ionic conductivity(~1.9×10^(-3)S·cm^(-1))is well *** assembled Li/Ga-LLZO/Li symmetric cell has a superior critical current density of 0.9 mA·cm^(-2),and cycles stably for 500 hours at a current density of 0.3 mA·cm^(-2).This research facilitates the potential commercial applications of high performance Ga-LLZO solid electrolytes in ASSLBs.

关键词： Ga-doped Li_7La_3Zr_2O_(12)(Ga-LLZO) defect chemistry engineering high room temperature ionic conductivity electrochemical stability

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Interfacial charge effects of supported-metal-cluster heterostructures on azo hydrogenation catalyzation

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Nano Research 2024年第5期17卷 3853-3862页

作者： Zhenhua Gu Jingli Zhang Zijun Zhang Qingxue Mu Liangchong Yu Taolei Sun Lei Shen Guanbin Gao State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Hubei Key Laboratory of Nanomedicine for Neurodegenerative Diseases School of ChemistryChemical Engineering and Life ScienceWuhan University of TechnologyWuhan 430070China

The impact of interfacial charge on catalytic performance of supported-metal-cluster(SMC)heterostructures remains unclear,hindering efforts to develop high-performance SMC *** we systematically investigated interfacial charge effects of SMCs using a model system of graphene-supported gold-nanoclusters(AuNCs/rGO)for azo *** types of SMCs with different interfacial charges were synthesized by anchoring electropositive 2-aminoethanethiol(CSH),amphoteric cysteine(Cys),and electronegative 3-mercaptopropionic-acid(MPA)onto AuNCs/rGO,*** three SMCs exhibited high and selective catalytic activity to azo-hydrogenation in four representative azo *** catalytic activity of Cys@AuNCs/rGO was lower than that of CSH@AuNCs/rGO but higher than that of MPA@AuNCs/***,the cyclic stability of Cys@AuNCs/rGO was inferior to that of both CSH@AuNCs/rGO and MPA@AuNCs/*** mechanistic studies revealed that amino ligands modified CSH@AuNCs and Cys@AuNCs agglomerated into large-size gold nanoparticles on rGO surface during catalytic reaction under NaBH_(4) action,leading to reduced efficiency and cyclic ***,non-amino ligand modified MPA@AuNCs only partially detached from rGO surface without agglomeration,resulting in better cyclic *** of amino groups in ligands such as modifying-NH_(3)^(+)group in Cys into imine to form N-isobutyryl-L-cysteine(NIBC)substantially improved the cyclic stability while maintaining the high activity in the NIBC@AuNCs/rGO catalyst *** work provides an approach for developing a highly-active and stable SMC heterostructure catalyst via manipulating interfacial charges in SMC.

关键词： interfacial charge effect supported-metal-cluster catalyst azo hydrogenation graphene supported gold nanoclusters

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Designing carboxymethyl cellulose based hydrogel electrolyte membranes enhanced by inorganic nanoparticle toward stable zinc anode

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Green Energy & Environment 2025年第3期10卷 537-550页

作者： Xiangye Li Yuan Li Yu Jiang Dahui Wang Fen Ran State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals Department of Polymeric Materials EngineeringSchool of Material Science and EngineeringLanzhou University of TechnologyLanzhou730050China

Aqueous zinc metal batteries have garnered substantial attention ascribing to affordability,intrinsic safety,and environmental benignity Nevertheless,zinc metal batteries yet are challenged with potential service life issues resulted from dendrites and side *** this paper,a strategy of nanoparticles doped hydrogel is proposed for constructing carboxymethyl cellulose/graphite oxide hybrid hydrogel electrolyte membranes with exceptional ionic conductivity,anti-swelling property,and simultaneously addressing the dendrites and parasitic *** pivotal functions of the carboxymethyl cellulose/graphite oxide hydrogel electrolyte in mitigating hydrogen evolution and fostering accelerated Zn deposition have been elucidated based on principles of thermodynamic and reaction *** carboxymethyl cellulose/graphite oxide hydrogel electrolyte endows exceptional cycling longevity (800 h at 1 mA cm^(-2)/1 mAh cm^(-2)) for Znjj Zn battery,as well as high Coulombic efficiency for Znjj Cu battery (averagely 99.14%within 439 cycles at 1 mA cm^(-2)/1 mAh cm^(-2)).The assembled Znjj NH_(4)V_(4)O_(10)battery delivers a high reversible specific capacity of 328.5 mAh g^(-1)at 0.1 A g^(-1).Moreover,the device of Znjj NH_(4)V_(4)O_(10)pouch battery remains operational under severe conditions like bending and *** work provides valuable reference in developing inorganic nanoparticle hybrid hydrogel electrolyte for realizing high-performance zinc metal batteries.

关键词： Carboxymethyl cellulose Graphite oxide Hydrogel electrolyte Anti-swelling

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Direct orientational epitaxy of wafer-scale 2D van der Waals heterostructures of metal dichalcogenides

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National Science Review 2025年第5期12卷 315-324页

作者： Shenghong Liu Ke Qin Jiashu Yang Tao Hu Hao Luo Jingsong Wu Zhen Cui Taotao Li Feng Ding Xinran Wang Yuan Li Tianyou Zhai State Key Laboratory of Materials Processing and Die & Mould Technology School of Materials Science and EngineeringHuazhong University of Science and Technology School of Materials Science and Engineering Xi'an University of Technology Suzhou Laboratory State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Nanostructure Research CenterWuhan University of Technology School of Integrated Circuits Nanjing University Research Institute of Huazhong University of Science and Technology in Shenzhen

Two-dimensional（2D） van der Waals（vdW） heterostructures have emerged as a groundbreaking candidate for future integrated circuits due to their tunable band structures,atomically sharp interfaces and seamless compatibility with complementary metal-oxide-semiconductor *** their promise,existing synthesis methods,such as mechanical transfer and vapor-phase conversion,struggle to achieve the high-quality,scalable production for practical *** response to these longstanding challenges,our study unveils for the first time the direct epitaxial growth of wafer-scale 2D vdW heterostructures（MoS2/SnS2） with exceptional quality and *** achievement is made possible through fundamentally enhancing the adsorption interactions between intermediates and the underlying *** heterostructures display pristine,defect-free interfaces,consistent crystal orientation and wafer-level thickness *** Raman peak shifts of MoS2and SnS2are constrained to below 0.5 cm-1across the entire wafer,with intensity deviations maintained within an impressive 2%,and thickness uniformity surpassing 99.5%.Owing to their exceptional crystallinity and interface quality,the heterostructures demonstrate extraordinary electron and hole transfer capabilities,showcasing a prominent rectification effect and an astounding responsivity of 6.28 ± 10～3 A/W,averaged from 30 *** study signifies a pivotal advancement for the integration of 2D materials into semiconductor technologies,paving the way for next-generation integrated circuits.

关键词： two-dimensional material heterostructure epitaxy growth optoelectronic device

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A hollow core-shell TiO2/NiCo2S4 Z-Scheme heterojunction photocatalyst for efficient hydrogen evolution

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材料科学技术（英文版） 2025年第9期212卷 182-191页

作者： Mao-Jin Ran Meng Wang Zhi-Yi Hu Yi-Fu Huang Lin-Dong Wang Lu Wu Man-Man Yuan Jian Zhang Bei Li Gustaaf Van Tendeloo Yu Li Bao-Lian Su State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Materials Science and EngineeringWuhan University of TechnologyWuhan 430070China Nanostructure Research Centre(NRC) Wuhan University of TechnologyWuhan 430070China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Materials Science and EngineeringWuhan University of TechnologyWuhan 430070China Nanostructure Research Centre(NRC) Wuhan University of TechnologyWuhan 430070China Electron Microscopy for Materials Science(EMAT) University of AntwerpGroenenborgerlaan 171Antwerp B-2020Belgium State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Materials Science and EngineeringWuhan University of TechnologyWuhan 430070China Laboratory of Inorganic Materials Chemistry(CMI) University of Namur61 rue de BruxellesNamur B-5000 Belgium

Constructing heterojunctions have received significant attention in photocatalysis because of their effi-cient separation of photogenerated carriers and improving light utilization *** sulfides(***2S4)are applied in electrocatalysis and supercapacitors that can be coupled with TiO2 to form a *** to the staggered energy band arrangement between TiO2 and NiCo2S4,the es-tablishing of a Z-scheme heterojunction between them is expected to enhance the carrier separation effi-ciency and reduce the sulfide ***,the application of NiCo2S4 in photocatalysis and studies on the mechanism of the TiO2/NiCo2S4 Z-scheme heterojunction have seldom been *** this work,we obtained a hollow core-shell TiO2/NiCo2S4 Z-scheme photocatalyst through a solvothermal method for photocatalytic hydrogen evolution(PHE).The PHE rate of the optimized TiO2/NiCo2S4-0.3 is 8.55 mmol g-1 h-1,approximately 34 times higher than pure TiO2,94 times higher than pure *** remarkable photocatalytic activity can be ascribed to the hollow structure and the in-situ constructed Z-scheme *** photogenerated charge transfer mechanism is revealed by hydroxyl radical trapping experiments and electron paramagnetic resonance(EPR)*** in-situ construc-tion of the Z-scheme heterojunction not only enhances the efficiency of separating the photogenerated carriers but also reduces the photo-corrosion of *** study proposes an effective strategy for the design of TiO2-based Z-scheme heterojunctions and the application of NiCo2S4 in photocatalysis.

关键词： TiO2 NiCo2S4 Hollow core-shell Z-Scheme Heterojunction Photocatalytic H2 evolution

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Universal Encapsulation Adhesive for Lead Sedimentation and Attachable Perovskite Solar Cells with Enhanced Performance

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Energy & Environmental materials 2024年第3期7卷 303-310页

作者： Xuehao Zhu Haoyu Cai Cong Bai Zhengzhe Wu Wenjian Shen Yiming Xiong Juan Zhao Fuzhi Huang Yibing Cheng Jie Zhong Research Centre for Advanced Thin Film Photovoltaics State Key Laboratory of Advanced Technology for Materials Synthesis and ProcessingWuhan University of TechnologyWuhan 430070China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Foshan 528216China School of Automobile Engineering Wuhan University of TechnologyWuhan 430070China

In this work,a modified polyurethane adhesive(PUA)was prepared to realize a convenient encapsulation strategy for lead sedimentation and attachable perovskite solar cells(A-PSCs).The modified PUA can completely self-heal within 45 min at room temperature with an efficient lead ion-blocking rate of 99.3%.The PUA film can be coated on a metal electrode with slight efficiency improvement from 23.96%to 24.15%.The thermal stability at 65℃and the humidity stability at 55%relative humidity(RH)are superior to the devices encapsulated with *** PUA film has strong adhesion to the flexible substrate and the initial efficiency of the flexible perovskite module(17.2%)encapsulated by PUA remains 92.6%within 1825 *** results suggest that PUA encapsulation is universal for rigid and flexible PSCs with enhanced stability and low lead ***,it was found that flexible PSCs can be well attached to various substrates with PUA,providing a facile route for the A-PSCs in various scenarios without additional encapsulation and installation.

关键词： adhesive attachable device flexible module lead leakage polyurethane

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3D-printable Boron Nitride/Polyacrylic Hydrogel Composites with High Thermal Conductivities

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Journal of Wuhan University of technology(materials Science) 2024年第5期39卷 1303-1310页

作者： DAI Jialei XUE Bingyu QIAN Qi HE Wenhao ZHU Chenglong LEI Liwen WANG Kun XIE Jingjing Hubei Longzhong Laboratory Xiangyang 441000China School of Materials Science and Engineering Wuhan University of TechnologyWuhan 430070China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China

Polyacrylic acid(PAA)hydrogel composites with different hexagonal boron nitride(h-BN)fillers were synthesized and successfully 3D-printed while their thermal conductivity was systematically *** the content of h-BN increasing from 0.1 wt%to 0.3 wt%,the thermal conductivity of the 3D-printed composites has been ***,through the shear force given by the 3D printer,a complete thermal conductivity path is obtained inside the hydrogel,which significantly improves the thermal conductivity of the h-BN hydrogel *** maximum thermal conductivity is 0.8808 W/(m·K),leading to a thermal conductive enhancement of 1000%,compared with the thermal conductivity of pure PAA *** study shows that using h-BN fillers can effectively and significantly improve the thermal conductivity of hydrogelbased materials while its 3D-printable ability has been maintained.

关键词： hydrogel composites boron nitride 3D printing thermal conductivity

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Effect of Particle Size on Silicon Nitride Ceramic Slurry by Stereolithography

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Journal of Wuhan University of technology(materials Science) 2023年第3期38卷 514-519页

作者：汪春柳 ZHANG Jinyong 雷丽文 School of Materials Science and Engineering Wuhan University of TechnologyWuhan 430070China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan 430070China

The effects of particle size,gradation and solid loading of silicon nitride (Si_(3)N_(4)) on the rheological behavior and curing properties of ceramic slurry are studied by stereolithography (SLA).The results show that the particle size of Si_(3)N_(4) powder has a signif icant influence on the rheological properties and stability of the *** m_(D50=1.3μm):m_(D50=2.3μm)=3:7,the slurry viscosity is low and the sedimentation is *** most important thing is that with the increase of the solid loading of the slurry,the viscosity of the slurry increases,the stability becomes higher,and the curing thickness *** curing thickness of Si_(3)N_(4) ceramic slurry with solid loading of 50 vol% can reach nearly 50μ*** above results finally show that the process optimizes the formulation of the slurry in rheological and curing properties.

关键词： silicon nitride stereolithography dispersion stability

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Constructing a stable cobalt-nitrogen-carbon air cathode from coordinatively unsaturated zeolitic-imidazole frameworks for rechargeable zinc-air batteries

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Nano Research 2022年第7期15卷 5895-5901页

作者： Tingting Wang Meng Liu Somboon Chaemchuen Jichao Wang Ye Yuan Cheng Chen Ang Qiao Francis Verpoort Zongkui Kou State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China

Zeolitic-imidazole frameworks(ZIFs)derivations have widely emerged as an efficient air cathode of zinc-air batteries(ZABs)due to excellent bifunctional oxygen electrocatalysis ***,they are not stable enough for long-term operation of rechargeable ZABs because of weak association with current collector,especially under bending conditions for flexible ZAB ***,we show that by purposely designing coordinatively unsaturated ZIFs via a facile morphology regulation,which can be chemically linked on acid-treated carbon cloth,a stable Co-N-C air cathode is therefore derived where Co nanoparticles(NPs)are uniformly confined within the Co-N-C matrix on carbon cloth(Co/Co-N-C/CC).Specifically,when without being stabilized from carbon cloth,the pyrolysis of ZIFs with different unsaturated coordination levels has a negligible impact on the bifunctional oxygen-catalyzed *** optimal Co/Co-N-C/CC catalyst assembled ZAB possesses a large open circuit voltage of 1.415 V and a high peak power density of 163 mW·cm^(−2) as well as excellent cycling durability upon 630 discharge–charge cycles with 61%voltage efficiency remained,largely exceeding those of a benchmark Pt/C-IrO_(2) catalyst assembled *** synergy between Co NPs and active Co-N-C sites via electronic interaction induces the outstanding bifunctional oxygen-catalyzed activity and cathode *** present work highlights the importance of unsaturated coordination structures in ZIFs precursors for the performance of derived nanostructures in integrated electrodes.

关键词： coordinatively unsaturated zeolitic-imidazole frameworks(ZIFs) cobalt-nitrogen-carbon bifunctional air electrodes zincair battery flexible electrode

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