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Tunable broadband near-infrared luminescence of chromium with self-induced valence variation in Sr3In2Ge3O12

Ceramics International 2025年

作者： Yang, Xiongfeng Fan, Xing He, Fangqian Zhang, Jianjie Tang, Chunhai Su, Liumei State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures MOE Key Laboratory of New Processing Technology for Nonferrous Metals and Materials School of Resources Environment and Materials Guangxi University Nanning530004 China School of Materials and Environment Guangxi Key Laboratory of Advanced Structural Materials and Carbon Neutralization Guangxi Colleges and Universities Key Laboratory of Eco-friendly Materials and Ecological Restoration Guangxi Minzu University Nanning530105 China

The demand for high-performance near-infrared (NIR) light-emitting materials has grown in recent years due to their great potential in numbers of technological fields, including non-destructive testing, optical telecommunications, and biological imaging. Herein, we present a novel Cr-activated NIR light-emitting garnet (Sr3In2Ge3O12) material with broadband dual-emission at NIR-I (860 nm, FWHM = 120 nm) and NIR-II (1480 nm, FWHM = 280 nm) regions under blue light excitation. Cr-doping results in the generation of multiple impurity levels within the band structure of Sr3In2Ge3O12, inducing a change in the host from an indirect to a direct band gap n-type semiconductor. Thanks to the multiple-sites occupancy of Cr ions in Sr3In2Ge3O12, the NIR dual-emission is verified to derive from the self-induced valence variation of Cr3+ and the intervalence energy transfer associated with Cr3+-Cr4+ aggregation. The large thermal activation energy and the weak electron-phonon coupling effect contribute to excellent thermal stability of the phosphor, with the emission intensities of Cr3+ and Cr4+ at 423 K maintaining 81.9 % and 86.3 % of that at room temperature. Moreover, the incorporation of Ca2+ into the Sr2+ lattice site enables the realization of tunable NIR emission in Sr3In2Ge3O12:Cr. The Sr3In2Ge3O12:Cr phosphor can be effectively utilized for the non-invasive detection of functional groups in a liquid medium. This work provides new insights into the design of broadband dual-emission light-emitting materials, which can be achieved by selecting an appropriate host to induce a valence variation in transition metal activators. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Phosphors

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Engineering Mesoporous Structure in Amorphous Carbon Boosts Potassium Storage with High Initial Coulombic Efficiency

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Nano-Micro Letters 2020年第11期12卷 39-50页

作者： Ruiting Guo Xiong Liu Bo Wen Fang Liu Jiashen Meng Peijie Wu Jinsong Wu Qi Li Liqiang Mai State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070People’s Republic of China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Xianhu Hydrogen ValleyFoshan 528200People’s Republic of China

Amorphous carbon shows great potential as an anode material for high-performance potassium-ion batteries;however,its abundant defects or micropores generally capture K ions,thus resulting in high irreversible capacity with low initial Coulombic efficiency(ICE)and limited practical ***,pore engineering via a facile self-etching strategy is applied to achieve mesoporous carbon(meso-C)nanowires with interconnected *** and evenly distributed mesopores could provide short K^+ pathways for its rapid *** to microporous carbon with highly disordered structure,the meso-C with Zn-catalyzed short-range ordered structure enables more K^+to reversibly intercalate into the graphitic ***,the mesoC shows an increased capacity by ~100 mAh g^-1 at 0.1 A g^-1,and the capacity retention is 70.7% after 1000 cycles at 1 A g^-*** in/ex situ characterizations reveal the reversible structural changes during the charging/discharging ***,benefiting from the mesoporous structure with reduced specific surface area by 31.5 times and less defects,the meso-C generates less irreversible capacity with high ICE up to 76.7%,one of the best reported values so *** work provides a new perspective that mesopores engineering can effectively accelerate K^+ diffusion and enhance K^+ adsorption/intercalation storage.

关键词： Potassium-ion battery Mesopores engineering Storage mechanism Initial Coulombic efficiency

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基于6,13-双氰基并五苯一维滑移堆积微米带状晶体的双极性电荷传输

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Science China materials 2023年第6期66卷 2429-2435页

作者：王宗瑞胡洋谢玉洁郄凤翔郭俊峰张磊史春风 Florian Glöcklhofer 甄永刚 Advanced Innovation Center for Soft Matter Science and Engineering State Key Laboratory of Organic-Inorganic CompositesBeijing University of Chemical TechnologyBeijing 100029China State Key Laboratory of Catalytic Materials and Reaction Engineering Research Institute of Petroleum ProcessingSINOPECBeijing 100083China State Key Laboratory of Luminescent Materials and Devices South China University of TechnologyGuangzhou 510640China Department of Chemistry and Centre for Processable Electronics Imperial College LondonLondonW120BZUnited Kingdom State Key Laboratory of Optoelectronic Materials and Technologies Sun Yat-sen UniversityGuangzhou 510275China

基于有机π共轭体系的一维自组装微纳米材料(1D-MNMs)具有较少的散射电荷传输、尺寸适中、易于制备等优点,可以方便地构筑集成微电路.虽然基于p沟道或n沟道有机半导体的一维自组装微纳米材料已经取得了巨大的进展,但遗憾的是,迄今为止,... 详细信息

基于有机π共轭体系的一维自组装微纳米材料(1D-MNMs)具有较少的散射电荷传输、尺寸适中、易于制备等优点,可以方便地构筑集成微电路.虽然基于p沟道或n沟道有机半导体的一维自组装微纳米材料已经取得了巨大的进展,但遗憾的是,迄今为止,基于双极性有机半导体的一维自组装微纳米材料还非常缺乏.本文利用物理气相传输法,制备了基于6,13-双氰基并五苯(DCP)的一维滑移堆积新型自组装微纳米材料,其表现出良好的双极性电荷传输特性,电子和空穴迁移率分别达到0.34和0.38 cm2 V^(-1)s^(-1),是一维自组装微纳米材料中最好的双极性电荷传输特性之一.此外,基于双极性DCP的一维自组装微纳米材料构建了互补型反相器,增益可达7,表明其在有机逻辑电路中具有潜在的应用前景.

关键词：微纳米材料有机半导体电荷传输自组装双极性逻辑电路空穴迁移率并五苯

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Carbon decorated Li_(3)V_(2)(PO_(4))_(3) for high-rate lithium-ion batteries:Electrochemical performance and charge compensation mechanism

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Journal of Energy Chemistry 2021年第2期30卷 124-131,I0005页

作者： Manling Ding Chen Cheng Qiulong Wei Yue Hu Yingying Yan Kehua Dai Jing Mao Jinghua Guo Liang Zhang Liqiang Maig Institute of Functional Nano&Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials&1 DevicesSoochow UniversitySuzhou 215123JiangsuChina Department of Materials Science and Engineering Fujian Key Laboratory of Materials GenomeCollege of MaterialsXiamen UniversityXiamen 361005FujianChina College of Chemistry Tianjin Normal UniversityTianjin 300387China School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001HenanChina Advanced Light Source Lawrence Berkeley National LaboratoryBerkeleyCA 94720United States Department of Chemistry and Biochemistry University of CaliforniaSanta CruzCA 95064United States State Key Laboratory of Advanced Technology for Materials Synthesis and Processing International School of Materials Science and EngineeringWuhan University of Technology.Wuhan 430070HubeiChina

Fast charging and high-power delivering batteries are highly demanded in mobile electronics,electric vehicles and grid energy storage,but there are full of *** star-material Li_(3)V_(2)(PO_(4))_(3) is demonstrated as a promising high-rate cathode material meeting the above ***,we report the carbon decorated Li_(3)V_(2)(PO_(4))_(3) (LVP/C) cathode prepared via a facile method,which displays a remarkable high-rate capability and long-term cycling ***,the prepared LVP/C delivers a high discharge capacity of 122 mAh g^(-1)(-93% of the theoretical capacity) at a high rate up to 20 C and a superior capacity retention of 87.1% after 1000 ***,by applying a combination of X-ray absorption spectroscopy and full-range mapping of resonant inelastic X-ray scattering,we clearly elucidate the structural and chemical evolutions of LVP upon various potentials and cycle *** show unambiguous spectroscopic evidences that the evolution of the hybridization strength between V and O in LVP/C as a consequence of lithiation/delithiation is highly reversible both in the bulk and on the surface during the discharge-charge processes even over extended cycles,which should be responsible for the remarkable electrochemical performance of LVP/*** present study provides not only an effective synthesis strategy but also deeper insights into the surface and bulk electrochemical reaction mechanism of LVP,which should be beneficial for the further design of high-performance LVP electrode materials.

关键词： Lithium-ion batteries Li_(3)V_(2)(PO_(4))_(3) Charge compensation mechanism X-ray absorption spectroscopy Resonant inelastic X-ray scattering

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Boosting photocatalytic hydrogen evolution of g-C_(3)N_(4) catalyst via lowering the Fermi level of co-catalyst

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Nano Research 2022年第2期15卷 1128-1134页

作者： Hairui Cai Bin Wang Laifei Xiong Jinglei Bi Hanjing Hao Xiaojing Yu Chao Li Jiamei Liu Shengchun Yang MOE Key Laboratory for Non-equilibrium Synthesis and Modulation of Condensed Matter Key Laboratory of Shaanxi for Advanced Materials and Mesoscopic PhysicsState Key Laboratory for Mechanical Behavior of MaterialsSchool of PhysicsXian Jiaotong UniversityNo.28 West Xianning RoadXi'an 710049China Shaanxi Collaborative Innovation Center for Hydrogen Fuel Cell Performance Improvement Xian Jiaotong UniversityNo.28 West Xianning RoadXi'an 710049China School of Materials Science and Engineering Xi'an University of TechnologyXi'an 710048China Instrument Analysis Center of Xian Jiaotong University Xian Jiaotong UniversityNo.28 West Xianning RoadXi'an 710049China

The photocatalytic performances are highly dependent on the charge separation and surface reaction kinetics of *** at figuring out the effects of co-catalyst with the lower Fermi level on photocatalytic activity,we tuned the Fermi level of Pt nanoparticles on g-C_(3)N_(4)(GCN)by introducing Co *** results show that lowering the Fermi level of co-catalyst does not alter light absorption of GCN due to the invariable ***,Pt_(3)Co with a lower Fermi level contributes less positive influence on charge separation in GCN due to an opposite effect from the stronger electron-trap ability of Pt_(3)Co and increased band bending in GCN-Pt_(3)*** density functional theory(DFT)calculations indicate that GCN-Pt_(3)Co has faster surface reaction kinetics than GCN-Pt,owing to easier dissociation of H_(2)O molecules and faster desorption of H^(*)on Pt_(3)***,GCN-Pt_(3)Co exhibits an excellent H_(2) evolution rate with 2.91 mmol g^(-1)·h^(-1),which 2.67 times that of GCN-Pt.

关键词： Schottky heterojunction surface reactions band bending Fermi level photocatalytic hydrogen evolution

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Enhanced Ablative Resistance of C/C Composites with Densified Zrb2-Based Ceramics by Incorporation of Mo as Interface Layer

SSRN

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SSRN 2022年

作者： Zou, Hailiang Zhang, Jinyong Zou, Ji Ping, Hang Wang, Weimin Ren, Lin Fu, Zhengyi Zhang, Fan The State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Hubei LongZhong Laboratory Xiangyang441100 China

ZrB 2 -ZrC-SiC-Mo-C/C (ZZS-Mo-C/C) composites were synthesised in this study using reaction spark plasma sintering at a low temperature. Furthermore, we investigated the densification process, microstructure, interfacial bonding, ablative properties, and underlying mechanism of the ZZS-Mo-C/C composites. Before and after ablation, the specimen exhibited excellent interfacial bonding, indicating that the presence of the Mo-foil transition layer enables an optimal connection between ZZS and C/C. Additionally, SEM analysis revealed that the ZZS ceramics had a dense structure, thereby preventing oxygen from diffusing further into the matrix. The results indicate that ZZS-Mo-C/C exhibits superior oxidation resistance when exposed to an oxygen-acetylene flame. © 2022, The Authors. All rights reserved.

关键词： Oxidation resistance

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Near-equiatomic high-entropy decagonal quasicrystal in Al20Si20Mn20Fe20Ga20

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Science China materials 2021年第2期64卷 440-447页

作者： Haikun Ma Liangqun Zhao Zhi-Yi Hu Dinghao Miao Ruixuan Li Tulai Sun He Tian Tiantian Zhang Hua Li Yong Zhang Zhanbing He State Key Laboratory for Advanced Metals and Materials University of Science and Technology BeijingBeijing100083China Nanostructure Research Centre(NRC) State Key Laboratory of Advanced Technology for Materials Synthesis and ProcessingWuhan University of TechnologyWuhan430070China School of Materials Science and Engineering Zhejiang UniversityHangzhou310027China

High-entropy alloys(HEAs)contain multiple principal alloying elements,but usually with simple crystal *** are structurally complex phases,but are generally dominated by only one ***,nearequiatomic high-entropy quasicrystals have rarely been reported because they are difficult to prepare experimentally and predict ***,the preparation and crystal structures of near-equiatomic high-entropy quasicrystals have drawn much *** report a quinary decagonal quasicrystal(DQC)with near-equiatomic alloying elements in Al20Si20Mn20Fe20Ga20 melt-spun ribbons,which is the first to our ***,the structural features of the DQC are characterized in *** configurational entropy of both the alloy and DQC satisfies the entropy-based criterion for HEAs,suggesting a high-entropy *** findings provide a new strategy to develop high-entropy quasicrystals.

关键词： high-entropy alloys decagonal quasicrystal high-entropy quasicrystals melt-spun ribbons high-angle annular dark-field scanning transmission electron microscopy

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The Ultra-High Softening Resistance Mediated by Strong Pinning of Grain Boundary from Nanometer Al 2O 3 Particles in an ADS-Copper Alloy

SSRN

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SSRN 2023年

作者： Liu, Feixiang Liu, Xinhua Xie, Guoliang Wu, Yuan Chen, Cunguang Key Laboratory for Advanced Materials Processing Ministry of Education Institute for Advanced Materials and Technology University of Science and Technology Beijing Beijing100083 China Beijing Advanced Innovation Center for Materials Genome Engineering Institute for Advanced Materials and Technology University of Science and Technology Beijing Beijing100083 China Beijing Laboratory of Metallic Materials and Processing for Modern Transportation Institute for Advanced Materials and Technology University of Science and Technology Beijing Beijing100083 China State Key Laboratory for Advanced Metals and Materials University of Science and Technology Beijing Beijing100083 China

An Al2O3 dispersion strengthened (ADS) alloy with ultra-high softening temperature of ~1200 K was fabricated by the in-situ internal oxidation and reduction method. The evolution of the nanometer Al2O3 particles, grain size, and consequently the softening behavior of this ADS alloy, was investigated by conducting the annealing treatment in the range from 673 K to 1273 K for 60 min. These 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 matrix. The average grain size was found to increase extremely slowly from ~0.60 μm to ~0.74 μm 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 particles. The strong pinning effect of Al2O3 particles was found when the grain size was between the lower limit (about 400-500 nm) and upper limit (2.18 μm). The occurrence of softening behavior was attributed to the rapid increase of the proportion of the 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 particles. The current study not only sheds light on the further understanding the softening mechanism of ADS copper alloy, but also provides a useful route for designing copper alloy with high softening resistance. © 2023, The Authors. All rights reserved.

关键词： Grain boundaries

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Correction: Duetting electronic structure modulation of Ru atoms in RuSe2@NC enables more moderate H* adsorption and water dissociation for hydrogen evolution reaction

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Journal of materials Chemistry A 2022年第18期10卷 10242-10243页

作者： Ding Chen Ruihu Lu Youtao Yao Dulan Wu Hongyu Zhao Ruohan Yu Zonghua Pu Pengyan Wang Jiawei Zhu Jun Yu Pengxia Ji Zongkui Kou Haolin Tang Shichun Mu State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China Foshan Xianhu Laboratory Foshan 528200 China State Key Laboratory of Silicate Materials for Architectures International School of Materials Science and Engineering Wuhan University of Technology Wuhan 430070 China

Correction for ‘Duetting electronic structure modulation of Ru atoms in RuSe2@NC enables more moderate H* adsorption and water dissociation for hydrogen evolution reaction’ by Ding Chen et al., J. Mater. Chem. A, 20...

Correction for ‘Duetting electronic structure modulation of Ru atoms in RuSe₂@NC enables more moderate H* adsorption and water dissociation for hydrogen evolution reaction’ by Ding Chen et al., J. Mater. Chem. A, 2022, 10, 7637–7644, https://***/10.1039/d2ta01032a.

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Scalable fabrication and active site identification of MOF shell-derived nitrogen-doped carbon hollow frameworks for oxygen reduction

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Journal of materials Science & technology 2021年第7期66卷 186-192页

作者： Jiashen Meng Ziang Liu Xiong Liu Wei Yang Lianzhou Wang Yan Li Yuan-Cheng Cao Xingcai Zhang Liqiang Mai State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan430070China Nanomaterials Centre School of Chemical Engineering and Australian Institute for Bioengineering and NanotechnologyThe University of QueenslandSt LuciaQLD4072Australia Shenzhen Power Supply Col.Ltd. Shenzhen CityChina State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan430074China John A.Paulson School of Engineering and Applied Sciences Harvard UniversityCambridgeMA02138United States

Nitrogen-doped carbon materials as promising oxygen reduction reaction(ORR) electrocatalysts attract great interest in fuel cells and metal-air batteries because of their relatively high activity, high surface area, high conductivity and low cost. To maximize their catalytic efficiency, rational design of efficient electrocatalysts with rich exposed active sites is highly desired. Besides, due to the complexity of nitrogen species, the identification of active nitrogen sites for ORR remains challenging. Herein, we develop a facile and scalable template method to construct high-concentration nitrogen-doped carbon hollow frameworks(NC), and reveal the effect of different nitrogen species on theirORRactivity on basis of experimental analysis and theoretical calculations. The formation mechanism is clearly revealed, including low-pressure vapor superassembly of thin zeolitic imidazolate framework(ZIF-8) shell on ZnO templates,in situ carbonization and template removal. The obtained NC-800 displays better ORR activity compared with other NC-700 and NC-900 samples. Our results indicate that the superior ORR activity of NC-800 is mainly attributed to its content balance of three nitrogen species. The graphitic N and pyrrolic N sites are responsible for lowering the working function, while the pyridinic N and pyrrolic N sites as possible active sites are beneficial for increasing the density of states.

关键词： MOF shell Nitrogen-doped carbon Hollow framework Oxygen reduction Active nitrogen sites

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