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Facet Regulation of Fe_(2)O_(3) via Nanoarray Architecture to Enable High Faradic Efficiency for Electrocatalytic Nitrogen Fixation

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Journal of Wuhan University of technology(materials Science) 2022年第5期37卷 807-814页

作者： XIE Angi XIAO Liang QIAO Qiumin LIU Jinping School of Chemistry Chemical Engineering and Life ScienceWuhan University of TechnologyWuhan430070China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan430070China

We propose a facile facet regulation enabled by nanoarray architecture to achieve a high faradic efficiency of Fe_(2)O_(3) catalyst for NRR. The a-Fe_(2)O_(3) nanorod arrays (NAs) were directly grown on carbon cloth (CC) with specific (104) facet exposure. The highly exposed (104) facets provide abundant unsaturated Fe atoms with dangling bonds as nitrogen reduction reaction catalytically active sites. In addition, the NAs architecture enables the enhanced electrochemical surface area (ECSA) to fully manifest the active sites and maintain the mass diffusion. Thus, the selectively exposed (104) facets coupled with the high ECSA of NAs architecture achieve a high FE of 14.89% and a high yield rate of 17.28 μg h^(-1) cm^(-2). This work presents an effective strategy to develop highly efficient catalytic electrodes for electrochemical NRR via facet regulation and nanoarray architecture.

关键词： facet regulation Fe_(2)O_(3) nanoarray architecture nitrogen reduction reaction faradic efficiency

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Spinel ferrite with excellent broadband infrared radiation properties for thermal management of electronics

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Ceramics International 2025年

作者： He, Lintao Zhu, Wanting Wang, Yixin Nie, Xiaolei Zhang, Yu Wei, Ping Zhao, Wenyu Zhang, Qingjie State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China

Electronic equipment faces increasing challenges related to heat dissipation due to miniaturization, high power, and integration advancements. Infrared radiation refrigeration offers numerous advantages, including zero energy consumption and pollution with minimal space occupation, making it highly compatible with the heat dissipation requirements of electronic equipment. However, advancing infrared radiative cooling technology for thermal management requires further research to develop broadband infrared transmitting materials with excellent performance. In this study, the spinel MeFe2O4 (Me = Cu, Mn, Ni, Co, Mg, Zn) powders were prepared through chemical co-precipitation and their emissivity was assessed in various wavebands (3–5, 8–14, 2.5–25, and 1–22 μm). The results showed that spinel ferrite materials displayed outstanding broadband infrared radiative properties. Among them, MnFe2O4 reached the highest emissivity values (0.90, 0.97, 0.96, and 0.97, respectively), suggesting that narrowing the bandgap and improving carrier concentration increases emissivity in the 3–5 μm waveband. Emissivity in the 8–14 μm waveband was also boosted by increasing lattice asymmetry and lattice strain. Furthermore, the MnFe2O4 powder was mixed with PVDF and Graphene, thereby yielding a flexible heat dissipation film. This MnFe2O4/Graphene/PVDF composite film lowered the surface temperature of electronic devices from 90.8 to 83.2 °C at an ambient temperature of 20 °C under operating conditions of approximately 9 W. This study provides an experimental paradigm for designing and optimizing radiative cooling materials for the thermal management of electronic devices. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Ferrite devices

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“Coffee ring” controlment in spray prepared >19% efficiency Cs_(0.19)FA_(0.81)PbI_(2.5)Br_(0.5) perovskite solar cells

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Journal of Energy Chemistry 2022年第4期31卷 201-208页

作者： Xinxin Yu Jing Li Yanping Mo Tianxing Xiang Zhiliang Ku Fuzhi Huang Fei Long Yong Peng Yi-Bing Cheng State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070HubeiChina Wuhan University of Technology Advanced Engineering Technology Research Institute of Zhongshan City Zhongshan 528437GuangdongChina College of Materials Science and Engineering Guilin University of TechnologyGuilin 541004GuangxiChina

Achieving high-quality perovskite films with uniform morphology and homogeneous crystallinity is challenging owing to the coffee ring effect(CRE) in the spray-coating technologies. In this study, an evaporation/spray-coating two-step deposition method is used to fabricate Cs_(0.19)FA_(0.81)PbI_(2.5)Br_(0.5)light harvesters for perovskite solar cells(PSCs). Considering the solid–liquid reaction, we establish a reaction-dependent regulating strategy that inhibits CRE successfully and prepare a high-quality perovskite layer, wherein the solvent for the FAI/Br solution during the spraying process is changed from isopropanol to n-butyl alcohol(NBA). The retarded-drying-enhanced spreading of the NBA solution inhibits contact line pinning to suppress the capillary flows and increases the reaction between metal halides(CsI/PbI_(2)) and organic salts(FAI/Br), which result in a reduction in the accumulation of solutes in the periphery effectively inhibiting CRE. Consequently, we obtain a high performance Cs_(0.19)FA_(0.81)PbI_(2.5)Br_(0.5) PSC with a power conversion efficiency(PCE) of 19.17%. An enlarged perovskite film(10 × 10 cm^(2)) containing 40 sub-cells is prepared. The average PCE of these devices is 18.33 ± 0.56%, proving the reliability of the "coffee ring" regulating strategy. This study provides an effective approach for CRE controlment in spraying technology to achieve high repeatability devices with good performance.

关键词： Cs_(0.19)FA_(0.81)PbI_(2.5)Br_(0.5)perovskite solar cells Spray coating Coffee ring effect Reaction-dependent regulating strategy

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Highly Selective Photocatalytic Conversion of Glucose on Holo-Symmetrically Spherical Three-Dimensionally Ordered Macroporous Heterojunction Photonic Crystal

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CCS Chemistry 2023年第8期5卷 1773-1788页

作者： Ting-Wei Wang Zhi-Wen Yin Yin-Hao Guo Fang-Yuan Bai Jun Chen Wenda Dong Jing Liu Zhi-Yi Hu Lihua Chen Yu Li 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 Laboratory of Inorganic Materials Chemistry(CMI) University of NamurB-5000 Namur

Photocatalytic conversion of biomass is considered an effective,clean,and environmentally friendly route to obtain high-valued chemicals and ***,the limited conversion efficiency and poor selectivity are still the main bottlenecks for photocatalytic biomass ***,we report the highly selective photocatalytic conversion of glucose solution on holosymmetrically spherical three-dimensionally ordered macroporous TiO_(2)-CdSe heterojunction photonic crystal structure(s-TCS).The obtained s-TCS photocatalysts show excellent stability and strong light harvesting,uniform mass diffusion and exchange,and efficient photogenerated electrons/holes separation and *** optimized s-TCS-4 photocatalyst displays the highest photocatalytic performance for glucose oxidation and hydrogen *** glucose conversion,lactic acid selectivity,and yield on s-TCS-4 are about 95.9%,94.3%,and 96.4%,*** photocatalytic production of lactic acid for s-TCS-4(18.5 g/L)is 2.3 times higher than the pure spherical TiO_(2) photonic crystal without CdSe(s-TiO_(2),8.1 g/L),and the hydrogen production rate of s-TCS-4 is 9.4 times that of s-TiO_(2).For the first time,we reveal that the photocatalytic conversion of glucose to lactic acid is a third-order and four-electron-involved *** work could shed some new light on the efficient photocatalysis conversion of biomass to highly value-added products with high selectivity and yield,and simultaneously sustainable hydrogen evolution.

关键词： TiO_(2)-CdSe heterojunction spherical photonic crystal high-selective photocatalytic glucose conversion lactic acid photocatalytic H2 production four-electron involved reaction third-order reaction

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Peridynamic Modeling of Brittle Fracture in Mindlin-Reissner Shell Theory

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Computer Modeling in Engineering & Sciences 2022年第5期131卷 715-746页

作者： Sai Li Xin Lai Lisheng Liu Department of Engineering Structure and Mechanics Wuhan University of TechnologyWuhan430070China Hubei Key Laboratory of Theory and Application of Advanced Materials Mechanics Wuhan University of TechnologyWuhan430070China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan430070China

In this work,wemodeled the brittle fracture of shell structure in the framework of Peridynamics Mindlin-Reissener shell theory,in which the shell is described by material points in themean-plane with its drilling rotation neglected in kinematic *** improve the numerical accuracy,the stress-point method is utilized to eliminate the numerical instability induced by the zero-energy mode and *** crack surface is represented explicitly by stress points,and a novel general crack criterion is proposed based on *** of the critical stretch used in common peridynamic solid,it is convenient to describe thematerial failure by using the classic constitutive model in continuum *** this work,a concise crack simulation algorithm is also provided to describe the crack path and its development,in order to simulate the brittle fracture of the shell *** examples are presented to validate and demonstrate our proposed *** reveal that our model has good accuracy and capability to represent crack propagation and branch spontaneously.

关键词： Peridynamic brittle fracture Reissner-Mindlin shell theory

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Single-Atom Lithiophilic Sites Confined within Ordered Porous Carbon for Ultrastable Lithium Metal Anodes

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Energy & Environmental materials 2023年第3期6卷 366-372页

作者： Wenzhong Huang Shanlin Liu Ruohan Yu Liang Zhou Zhenhui Liu Liqiang Mai State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Nanostructure Research Centre Wuhan University of TechnologyWuhan 430070China College of Material Science and Engineering Nanjing University of Aeronautics and AstronauticsNanjing 210016China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Xianhu hydrogen ValleyFoshan 528200China

Attributing to the high specific capacity and low electrochemical reduction potential,lithium(Li)metal is regarded as the most promising anode for high-energy Li ***,the growth of lithium dendrites and huge volume change seriously limit the development of lithium metal *** overcome these challenges,an ordered mesoporous N-doped carbon with lithiophilic single atoms is proposed to induce uniform nucleation and deposition of Li *** from the synergistic effects of interconnected three-dimensional ordered mesoporous structures and abundant lithiophilic single-atom sites,regulated local current density and rapid mass transfer can be achieved,leading to the uniform Li deposition with inhibition of dendrites and buffered volume *** a result,the as-fabricated anode exhibits a high CE of 99.8%for 200 cycles.A stable voltage hysteresis of 14 mV at 5 mA cm^(−2)could be maintained for more than 1330 h in the symmetric ***,the full cell coupled with commercial LiFePO_(4)exhibits high reversible capacity of 108 mAh g^(−1)and average Coulombic efficiency of 99.8%from 5th to 350th cycles at 1 *** ordered mesoporous carbon host with abundant lithiophilic single-atom sites delivers new inspirations into rational design of high-performance Li metal anodes.

关键词： lithiophilic lithium metal battery ordered mesoporous carbon single atom

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Enhanced Microwave Absorption for High Filler Content Composite Molded from Polymer Coated Flaky Carbonyl Irons Modified by Silane Coupling Agents

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Journal of Wuhan University of technology(materials Science) 2023年第1期38卷 42-51页

作者：崔正明 MA Guoqing WANG Mengqi LUO Chuangyu CHEN Zhihong MA Huiru LI Qifan 李维 State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Materials Science and EngineeringWuhan University of TechnologyWuhan 430070China School of Science Wuhan University of TechnologyWuhan 430070China Department of Chemistry School of ChemistryChemical Engineering and Life ScienceWuhan University of TechnologyWuhan 430070China School of Physics and Electronic Science Hubei UniversityWuhan 430062China

A microwave absorbing sheet with a high complex permeability and a relatively low complex permittivity is obtained by molding of the densely coated flaky carbonyl iron particles(FCIPs)by styrenebutadiene-styrene block copolymer(SBS)in the assistance of coupling agent *** molding of the core-shell FCIPs without adding extra binder results in a large permeability due to the high filling ratio(55vol%)of ***,the permittivity is well suppressed by the dense insulate polymer shell on the FCIPs,avoiding the severe impedance mismatch problem of the high filler content microwave absorbing *** show that modifying the surface of FCIPs by proper amount of silane coupling agent is critical for the coating quality of the SBS shell,which is verified by resistivity and corrosion current density measurements,and can be interpreted by improved interfacial compatibility between the modified FCIPs and *** obtained microwave absorbing sheet shows a minimum reflection loss of-38.74 dB at 1.57 GHz and has an effective absorption bandwidth from 1.1 to 2.3 GHz at a relatively small thickness of 2 mm.

关键词： microwave absorber coating quality magnetic permeability permittivity low frequency

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Scalable fabrication of graphene-assembled multifunctional electrode with efficient electrochemical detection of dopamine and glucose

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Nano Research 2023年第5期16卷 6361-6368页

作者： Xiaodong Ji Xin Zhao Zixin Zhang Yunfa Si Wei Qian Huaqiang Fu Zibo Chen Zhe Wang Huihui Jin Zhugen Yang Daping He State Key Laboratory of Silicate Materials for Architectures Wuhan University of TechnologyWuhan 430070China Hubei Engineering Research Center of RF-Microwave Technology and Application Wuhan University of TechnologyWuhan 430070China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China School of Information Engineering Wuhan University of TechnologyWuhan 430070China School of Water Energy and EnvironmentCranfield UniversityMilton KeynesMK430ALUK

Conventional glassy carbon electrodes(GCE)cannot meet the requirements of future electrodes for wider use due to low conductivity,high cost,non-portability,lack of ***,cost-effective and wearable electrode enabling rapid and versatile molecule detection is becoming important,especially with the ever-increasing demand for health monitoring and point-ofcare *** is considered as an ideal electrode due to its excellent physicochemical ***,we prepare graphene film with ultra-high conductivity and customize the 3-electrode system via a facile and highly controllable laser engraving *** from the ultra-high conductivity(5.65×10^(5)S·m^(−1)),the 3-electrode system can be used as multifunctional electrode for direct detection of dopamine(DA)and enzyme-based detection of glucose without further metal *** dynamic ranges from 1–200μM to 0.5–8.0 mM were observed for DA and glucose,respectively,with a limit of detection(LOD)of 0.6μM and 0.41 ***,the excellent target detection capability caused by the ultra-high conductivity and ease modification of graphene films,together with their superb mechanical properties and ease of mass-produced,provides clear potential not only for replacing GCE for various electrochemical studies but also for the development of portable and highperformance electrochemical wearable medical devices.

关键词： graphene film ultra-high conductivity multifunctional electrode point-of-care diagnosis wearable medical devices

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Activating Inert Sites in Cobalt Silicate Hydroxides for Oxygen Evolution through Atomically Doping

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Energy & Environmental materials 2022年第2期5卷 655-661页

作者： Jiexin Zhu Lixue Xia Wenxuan Yang Ruohan Yu Wei Zhang Wen Luo Yuhang Dai Wei Wei Liang Zhou Yan Zhao Liqiang Mai State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China International School of Materials Science and Engineering Wuhan University of TechnologyWuhan 430070China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Xianhu Hydrogen ValleyFoshan 528200China

Metal silicate hydroxides have been recognized as efficient oxygen evolution reaction(OER)electrocatalysts,yet tailoring of their intrinsic activity remains ***,Fe had been incorporated into cobalt silicate hydroxide nanosheets and the resulted material achieves a competitive OER catalytic *** is found that the doping state obviously affects the electrical transport ***,highly dispersed Fe atoms(low-concentration Fe doping)trigger slight electron transfer to Co atoms while serried Fe(highconcentration Fe doping)attract vast *** introducing 6 at.%Fe doping,partial relatively inert Co sites are activated by atomically dispersed Fe,bearing an optimal metal 3d electronic occupation and adsorption capacity to oxygen *** introduced Co-O-Fe unit trigger the p-donation effect and decrease the number of electrons in p*-antibonding orbitals,which enhance the Fe-O covalency and the structural *** a result,the sample delivers a low overpotential of 293 mV to achieve a current density of 10 mA cm^(-2).This work clarifies the superiority of atomically dispersed doping state,which is of fundamental interest to the design of doped catalyst.

关键词： atomically doping electrochemistry electron transfer metal silicate hydroxides oxygen evolution

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NASICONs-type solid-state electrolytes:The history,physicochemical properties,and challenges

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Interdisciplinary materials 2023年第1期2卷 91-110页

作者： Lixiao Zhang Yimeng Liu Ya You Ajayan Vinu Liqiang Mai State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhanChina International School of Materials Science and Engineering Wuhan University of TechnologyWuhanChina Global Innovative Center for Advanced Nanomaterials(GICAN) School of EngineeringCollege of EngineeringScienceand the EnvironmentThe University of NewcastleCallaghanNew South Wales 2308Australia

Solid-state electrolytes are critical for the development of next-generation high-energy and high-safety rechargeable *** all the candidates,sodium(Na)superionic conductors(NASICONs)are highly promising because of their evident advantages in high ionic conductivity and high chemical/electrochemical *** concept of NASICONs was proposed by Hong and Goodenough et *** 1976 by reporting the synthesis and characterization of Na1+xZr2(SixP3−x)O12(0≤x≤3),which has attracted tremendous attention on the NASICONs-type solid-state *** this review,we are committed to describing the development history of NASICONs-type solid-state electrolytes and elucidating the contribution of Goodenough as a tribute to *** summarize the correlations and differences between lithium-based and sodium-based NASICONs electrolytes,such as their preparation methods,structures,ionic conductivities,and the mechanisms of ion *** challenges of NASICONs-structured electrolytes are discussed,and several research directions are proposed to tackle the obstacles toward practical applications.

关键词： electrode/electrolyte interface grain boundary resistance high ionic conductivity NASICONs solid-state electrolyte

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