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Graphitic carbon nitride/La,Rh co-doped SrTiO_(3)S-scheme heterojunction for photocatalytic CO_(2)reduction

Rare Metals 2024年第11期43卷 5880-5890页

作者： Si-Jie Wan Yan-Ting Hou Wang Wang Guo-Qiang Luo Chuan-Bin Wang Rong Tu Shao-Wen Cao Chaozhou Branch of Chemistry and Chemical Engineering Guangdong Laboratory Chaozhou 521000China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Hubei Technology Innovation Center for Advanced Composites Wuhan University of TechnologyWuhan 430070China

Photocatalytic reduction of CO_(2)has attracted considerable interest owing to its potential to resolve the energy and environmental ***,the lack of proficient photocatalysts has restricted the application of solar-driven photocatalytic CO_(2)***,we reported an S-scheme heterojunction by combining g-C_(3)N_(4)with La^(3+)and Rh^(3+)co-doped SrTiO_(3)through the electrostatic self-assembly method for the efficient photocatalytic CO_(2)*** comparison with g-C_(3)N_(4),the asprepared CN/LRSTO-30 wt%S-scheme heterojunction not only possesses a broadened visible-light response due to the defect states in La,Rh co-doped SrTiO_(3)induced by codoped La^(3+)and Rh^(3+)but also has more adsorption sites for the capture and activation of CO_(2)***,separation and transfer efficiency of the photoinduced charge carriers is much enhanced in the CN/LRSTO-30wt%S-scheme heterojunction via its robust internal electric field,which is firmly demonstrated by in situ irradiation X-ray photoelectron spectroscopy ***,the prepared S-scheme heterojunction achieves impressive photocatalytic CO_(2)reduction performance with an average CO and CH4 evolution rate of4.1-1.8μmol·g^(-1)·h^(-1),respectively,which are~1.9 and~22.5-fold higher than those of pure g-C_(3)N_(4).This study provides innovative perspectives on the design of creative S-scheme heterojunctions for applications in photocatalytic CO_(2)reduction.

关键词： g-C_(3)N_(4) La Rh co-doped SrTiO_(3) S-scheme heterojunction Separation of photogenerated charge carriers Photocatalytic CO_(2)reduction

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Yolk-shell FeSe_(2)@CoSe_(2)/FeSe_(2) heterojunction as anode materials for sodium-ion batteries with high rate capability and stability

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Journal of materials Science & technology 2024年第5期172卷 185-195页

作者： Liuyang Zhang Bicheng Zhu Difa Xu Zibao Qian Ping Xie Tao Liu Jiaguo Yu Laboratory of Solar Fuel Faculty of Materials Science and ChemistryChina University of GeosciencesWuhan 430078China Hunan Key Laboratory of Applied Environmental Photocatalysis Changsha UniversityChangsha 410022China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China

Sodium-ion batteries are promising candidates for large-scale grid storage systems and other *** foremost advantage derives from superior environmental credentials,enhanced safety as well as lower raw material costs than lithium-ion *** is still challenging to explore desirable anode *** this study,FeSe_(2)@CoSe_(2)/FeSe_(2),with a yolk-shell structure was prepared by ion exchange and *** FeSe_(2)@CoSe_(2)/FeSe_(2)prepared as anode material for sodiumion batteries exhibits excellent rate capability due to the synergistic effect of bimetallic selenides and the interfacial effect of the ***,it delivers high performance(510 mAh g^(-1)at 0.2 A g^(-1)),superior rate capa-bility(90%retention at 5 A g^(-1)),and good long-time cycling stability(78%capacity retention after 1800 cycles at a high current density of 2 A g^(-1)).The optimized sodiumion full cell with FeSe_(2)@CoSe_(2)/FeSe_(2)as the anode and Na 3 V 2(PO 4)3 as the cathode still demonstrates excellent ***,a ca-pacity of 272 mAh g^(-1)(at 1 A g^(-1))within the operating voltage from 1 to 3.8 V can be *** work illustrates the potential of bimetallic selenides with heterostructures for performance enhancement of sodium-ion batteries.

关键词： Cobalt-iron selenide Heterojunctions Sodium storage Anode material Full battery

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Pressureless densification and properties of high-entropy boride ceramics with B_(4)C additions

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Journal of materials Science & technology 2024年第23期190卷 1-9页

作者： Fawei Wang Liang Xu Ji Zou Jingjing Liu Huayue Liang Wei Ji Weimin Wang Zhengyi Fu 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

High entropy boride ceramics have great potential as structural materials serving in extreme ***,their applications are limited by the difficulty of *** the present study,dense(Ti_(0.2)Zr_(0.2)Hf_(0.2)Nb_(0.2)Ta_(0.2))B_(2)ceramics with B_(4)C additions were prepared through pressureless sintering at as low as 1900℃.Calculations based on the CALPHAD approach predict that(Ti_(0.2)Zr_(0.2)Hf_(0.2)Nb_(0.2)Ta_(0.2))B_(2)starts to melt at about 3315℃whilst B_(4)C additions reduce the temperature and broaden the tempera-ture region where solid and liquid *** showed that the introduction of B_(4)C could trigger the densification of(Ti_(0.2)Zr_(0.2)Hf_(0.2)Nb_(0.2)Ta_(0.2))B_(2)at a lower temperature and promote their densification *** relative density of samples with 5 wt%of B_(4)C additions sintered at 1900 and 2000℃was 97.7%and 99.7%,*** the sintering temperature was further increased to 2100℃,the liquid phase was reactively formed,leading to the rapid grain coarsening in samples with B_(4)C *** by well-dispersed B_(4)C grains,the sample with 5 wt%B_(4)C sintered at 2000℃exhibited excellent mechanical properties with the Vickers hardness,flexural strength,and fracture toughness of 21.07±2.09 GPa,547±45 MPa,and 5.24±0.14 MPa m^(1/2),which are comparable or even higher than counterparts sintered under pressure.

关键词： High entropy boride ceramic Microstructure Pressureless sintering Densification Mechanical properties

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Exploring photogenerated charge carrier transfer in semiconductor/metal junctions using Kelvin probe force microscopy

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Journal of materials Science & technology 2024年第6期173卷 11-19页

作者： Chuanbiao Bie Zheng Meng Bowen He Bei Cheng Gang Liu Bicheng Zhu Laboratory of Solar Fuel Faculty of Materials Science and ChemistryChina University of GeosciencesWuhan 430078China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China CAS Key Laboratory of Standardization and Measurement for Nanotechnology National Center for Nanoscience and TechnologyBeijing 100190China

Semiconductor/metal junctions are widely discussed in ***,there is a notable scarcity of systematic studies focusing on photogenerated charge carrier transfer in such ***,CdS/Pt,CdS/Au,and CdS/Ag are synthesized to serve as model systems for investigating the charge carrier transfer in semiconductor/metal *** probe force microscopy is employed to visualize the transfer of photogenerated carriers in these *** results show that the electron transfer behavior under illumination is related to the conduction band position of CdS and the Fermi level position of the ***,Schottky junctions hinder the transfer of photogenerated electrons from CdS to Pt and Au,whereas ohmic contacts facilitate the transfer of photogenerated electrons from CdS to *** work provides novel insights into the mechanisms governing the transfer of photogenerated carriers in semiconductor/metal junctions.

关键词： Kelvin probe force microscopy Surface potential Work function Contact potential difference Charge carrier transfer

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synthesis of magnetic targeted delivery microcapsules and its anti-corrosion self-healing behavior in epoxy resin coatings

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Corrosion Communications 2023年第2期10卷 27-37页

作者： Yingxiang Ma Dan Jiang Yuping Yang Li Ma Jian Zhou Guosheng Huang Cunguo Lin State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology State Key Laboratory for Marine Corrosion and Protection Luoyang Ship Material Research Institute

This study proposed a tung-oil based magnetic targeted delivery microcapsules （MDTMs） to enhance the efficiency of self-healing coatings （SHC）.Magnetic particles were used as function particles and emulsifier in synthesis of microcapsules （MC）.DSC,OM,SEM,TEM,VSM,NSS,EIS and SKP were used to characterize the compounds,structure,healing behavior and anti-corrosion *** indicate that magnetically driven SHC （MD-SHC） reduces 50%migration path of the released tung oil,and increases the release rate of tung oil after the coating is mechanically *** and EIS results suggest that the healing part has impressive anti-corrosion performance,scratches were filled with a large amount of tung oil in a short time,and the released tung oil had formed a complete oil film on scratches at 24 h with higher polarization resistance （Rp）.Rpof MD-SHC（2.5×10～5–3.6×10～5Ωcm2） is 2.0–2.8 times of that the SHC （1.1×10～5–1.8×10～5Ωcm2）.The enrichment in MD-SHC at the interface decreases bonding strength from 7 to 4.5 MPa as the mass additive of microcapsules reaches 15 wt.%.The current work proves the effectiveness of MD-SHC in improving self-healing ability.

关键词： Self-healing coatings Corrosion Microcapsules Magnetic particle Electrochemical impedance spectroscopy

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Acidic oxygen evolution reaction:Mechanism,catalyst classification,and enhancement strategies

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Interdisciplinary materials 2023年第1期2卷 53-90页

作者： Qianli Ma Shichun Mu Fuel cell Materials Laboratory Foshan Xianhu LaboratoryFoshanChina State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhanChina

As the most desirable hydrogen production device,the highly efficient acidic proton exchange membrane water electrolyzers(PEMWE)are severely limited by the sluggish kinetics of oxygen evolution reaction(OER)at the *** IrO2 is a commercial acid-stable OER catalyst with poor activity and high cost,which has motivated the development of ***,hitherto most of the designed acidic OER catalysts have disadvantages of low activity or stability,which cannot meet the requirement of industrial ***,exploring suitable strategies to enhance the activity and stability of cost-effective acidic OER catalysts is crucial for developing the PEMWE *** this review,the main OER mechanisms,different types of catalysts,and their activity and stability characteristics are summarized and discussed,and then possible strategies to improve activity and stability are ***,the problems and prospects of such catalysts are generalized to shed some light on the future research of advanced catalysts for acidic OER.

关键词： catalyst hydrogen energy oxygen evolution reaction proton exchange membrane water electrolyzer water oxidation

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Grain-refining fabrication of nanocrystalline(La_(0.2)Nd_(0.2)Sm_(0.2)Gd_(0.2)Eu_(0.2))_(2)Zr_(2)O_(7)high-entropy ceramics by ultra-high pressure sintering

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Journal of materials Science & technology 2023年第36期167卷 205-212页

作者： Zhangtian Wu Wei Ji Jinyong Zhang Yanan Yuan Ji Zou Weimin Wang Zhengyi Fu State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Hubei Longzhong Laboratory Wuhan University of Technology Xiangyang Demonstration ZoneXiangyang 441000China

As an important A_(2)B_(2)O_(7)-type ceramic,(La_(0.2)Nd_(0.2)Sm_(0.2)Gd_(0.2)Eu_(0.2))_(2)Zr_(2)O_(7)high-entropy pyrochlore pos-sesses promising properties such as high melting point,high chemical durability,and low thermal ***,the low sintering ability limits its application in thermal barrier coating and radioactive waste *** usually needs long-term high-temperature soaking to achieve full density,but with inevitable grain *** this work,dense and grain-refined nanocrystalline(La_(0.2)Nd_(0.2)Sm_(0.2)Gd_(0.2)Eu_(0.2))_(2)Zr_(2)O_(7)ceramics were prepared with ultra-high pressure sintering(UHPS)method under 10 GPa at a low temperature of 800℃.The densification behavior,microstructure evo-lution,and properties of the UHPS-ed samples were then *** grain size of as-prepared(La_(0.2)Nd_(0.2)Sm_(0.2)Gd_(0.2)Eu_(0.2))_(2)Zr_(2)O_(7)ceramic was only 151 nm,which is 40%smaller than that of raw *** addition,it exhibited advantageous properties including both high hardness and aqueous *** deformation under ultra-high pressure was believed as the dominant densification mechanism responsible for grain refinement and property improvement.

关键词： High-entropy ceramics Ultra-high pressure sintering Grain refining Nanocrystalline Plastic deformation

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Boosting the electrochromic properties by large V_(2)O_(5)nanobelts interlayer spacing tuned via PEDOT

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Chinese Chemical Letters 2024年第9期35卷 408-413页

作者： Haohao Sun Wenxuan Wang Yuli Xiong Zelang Jian Wen Chen State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Materials Science and EngineeringWuhan University of TechnologyWuhan 430070China Sanya Science and Education Innovation Park of Wuhan University of Technology Sanya 572000China

Vanadium pentoxide(V_(2)O_(5))with a layered structure is of great interest in the field of electrochromic(EC)due to its abundance of color ***,there are still a series of problems such as slow ion diffusion,poor electronic conductivity and cyclic stability in the reaction ***,we successfully prepared a stable and fast multi-color electrochromic material V_(2)O_(5)-PEDOT by a simple“one-pot”*** layer space of V_(2)O_(5)could be tuned by 3,4-ethylenedioxythiophene(named V_(2)O_(5)-PEDOT)during the dissolution and recrystallization of vanadium *** expanded layer spacing facilitates rapid ion insertion and *** serves as an internal conductive pillar to improve the overall conductivity of the *** obtained intercrossing structure of the nanobelts shortens the ion diffusion distance and ensures electrolyte *** V_(2)O_(5)-PEDOT exhibits the fast response time(1.1 s for coloration and 3.5 s for bleaching at 422 nm),high optical contrast(ΔT=45%at 422 nm andΔT=35.2%at 1000 nm),great coloration efficiency(CE=97.1 cm2/C),and high cyclic stability(86%preserved after 3000 cycles).The electrochromic devices(ECD)were successfully assembled by using V_(2)O_(5)-PEDOT films as ion storage layers and electrochromic layers,demonstrating remarkable performance.

关键词： Vanadium oxide PEDOT Nanobelts Interlayer spacing Electrochromic

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Studies on thermal stability,softening behavior and mechanism of an ADS copper alloy at elevated temperatures

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Journal of materials Science & technology 2024年第19期186卷 79-90页

作者： Feixiang Liu Xinhua Liu Guoliang Xie Yuan Wu Cunguang Chen Key Laboratory for Advanced Materials Processing(MOE) Institute for Advanced Materials and TechnologyUniversity of Science and Technology BeijingBeijing 100083China Beijing Advanced Innovation Center for Materials Genome Engineering Institute for Advanced Materials and TechnologyUniversity of Science and Technology BeijingBeijing 100083China Beijing Laboratory of Metallic Materials and Processing for Modern Transportation Institute for Advanced Materials and TechnologyUniversity of Science and Technology BeijingBeijing 100083China State Key Laboratory for Advanced Metals and Materials University of Science and Technology BeijingBeijing 100083China Institute for Advanced Materials and Technology University of Science and Technology BeijingBeijing 100083China

An Al2O3 dispersion strengthened(ADS)alloy with an ultra-high softening temperature of∼1200 K was fabricated by the in-situ internal oxidation and reduction *** evolution of the nanometer Al2O3 particles,grain size,and consequently the softening behavior of this ADS alloy,were investigated by conducting the annealing treatments in the range from 673 K to 1273 K for 60 *** refined nanometer Al2O3 particles were found to be highly stable at elevated temperatures,leading to the high dislocation density and grain boundary stability of the *** average grain size was found to increase extremely slowly from∼0.60μm to∼0.74μm with increasing annealing temperatures from 773 K to 1273 K.A criterion for grain boundaries migration and softening was established based on the competition between grain growth and pinning effect of Al2O3 *** strong pinning effect of Al2O3 particles was found when the grain size was between the lower limit(about 0.4-0.5μm)and upper limit(2.18μm).The occurrence of softening behavior was attributed to the rapid increase of the proportion of grains larger than the upper limit.A modified Hall-Petch relationship was established by introducing the integration of the grain size distribution,which can describe this correlation between softening behavior and the pinning effect of Al2O3 *** current study not only sheds light on the further understanding of the softening mechanism of ADS copper alloy but also provides a useful route for designing copper alloy with high softening resistance.

关键词： ADS copper alloy Nanometer-scaled Al2O3 particles Grain growth Softening mechanism Softening model

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Spatial confinement of free-standing graphene sponge enables excellent stability of conversion-type Fe_(2)O_(3)anode for sodium storage

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Chinese Chemical Letters 2025年第3期36卷 544-549页

作者： Jun Dong Senyuan Tan Sunbin Yang Yalong Jiang Ruxing Wang Jian Ao Zilun Chen Chaohai Zhang Qinyou An Xiaoxing Zhang Hubei Key Laboratory for High-efficiency Utilization of Solar Energy and Operation Control of Energy Storage System Hubei University of TechnologyWuhan 430068China State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile UniversityWuhan 430200China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Nanjing University of Aeronautics and Astronautics Nanjing 210016China

Conversion-type anode materials are highly desirable for Na-ion batteries(NIBs)due to their high theoretical ***,the active materials undergo severe expansion and pulverization during the sodiation,resulting in inferior cycling ***,a self-supporting three-dimensional(3D)graphene sponge decorated with Fe_(2)O_(3)nanocubes(rGO@Fe_(2)O_(3))is ***,the 3D graphene sponge with resilience and high porosity benefits to accommodate the volume expansion of the Fe_(2)O_(3)nanocubes and facilitates the rapid electrons/ions transport,enabling spatial confinement to achieve outstanding ***,the free-standing rGO@Fe_(2)O_(3)can be directly used as an electrode without additional binders and conductive additives,which helps to obtain a higher energy *** on the total mass of the rGO@Fe_(2)O_(3)material,the rGO@Fe_(2)O_(3)anode presents a specific capacity of 859 mAh/g at 0.1 A/*** also delivers an impressive cycling performance(327 mAh/g after 2000 cycles at 1 A/g)and a superior rate capacity(162mAh/g at 20 A/g).The coin-type Na_(3)V_(2)(PO_(4))_(3)@C//rGO@Fe_(2)O_(3)NIB exhibits an energy density of 265.3Wh/*** unique 3D ionic/electronic conductive network may provide new strategies to design advanced conversion-type anode materials for high-performance NIBs.

关键词： Conversion-type anode Spatial confinement Fe_(2)O_(3) Graphene network Self-supporting Sodium-ion batteries

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