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Robust low threshold full-color upconversion lasing in rare-earth activated nanocrystal-in-glass microcavity

Light(science & Applications) 2025年第3期14卷 656-664页

作者： Zhigang Gao Lugui Cui Yushi Chu Luyue Niu Lehan Wang Rui Zhao Yulong Yang Xiaofeng Liu Jing Ren Guoping Dong College of Physics and Electronic Engineering Taishan University271021TaianChina Key Laboratory of In-fiber Integrated Optics of Ministry of Education College of Physics and Optoelectronic EngineeringHarbin Engineering University150001 HarbinChina School of Materials Science and Engineering Zhejiang UniversityHangzhouChina State Key Laboratory of Luminescent Materials and Devices and Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied TechniquesSchool of Materials Science and EngineeringSouth China University of Technology510640 GuangzhouChina

Visible light microlasers are essential building blocks for integrated ***,achieving low-threshold(μw),continuous-wave(CW)visible light lasing at room temperature(RT)has been a challenge because of the formidable requirement of population inversion at short ***-earth(RE)-activated microcavities,featuring highquality factor(Q)and small mode volume of whispering gallery modes,offer a great opportunity for achieving infrared-to-visible upconversion(UC)***,we report that batch-produced nano-glass composite(GC)microspheres incorporating RE-doped fluoride nanocrystals show efficient UC *** multi-phase composite microspheres exhibit a high Q value(≥10^(5)),comparable to that of conventional multi-component glass *** UC lasing with pure red,green,and blue(RGB)emissions are demonstrated based on a highly efficient tapered fiber-microsphere *** importantly,the GC microspheres manifest reduced(by 45%)lasing threshold and enhanced(more than four times)slope *** characteristics,together with excellent long-term stability,suggest a promising solution to achieving highly robust,stand-alone,low-threshold,and versatile UC microlasers.

关键词： robust lasing integrated photonicshoweverachieving low threshold lasing nanocrystal glass microcavity visible light microlasers upconversion lasing building blocks population inversion

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Simultaneously tuning structural defects and crystal phase in accordion-like Ti_(x)O_(2x−1)derived from Ti_(3)C_(2)T_(x)MXene for enhanced electromagnetic attenuation

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Journal of Advanced Ceramics 2023年第10期12卷 1946-1960页

作者： Yang Li Yuchang Qing Yuerui Zhang Hailong Xu State Key Laboratory of Solidification Processing School of Material Science and EngineeringNorthwestern Polytechnical UniversityXi’an 710072China

Single Ti_(3)C_(2)T_(x)MXene(MTO)materials are not suitable for electromagnetic(EM)wave absorption due to their high conductivity and impedance *** address this issue,we ingeniously took advantage of easily oxidized characteristics of Ti_(3)C_(2)T_(x)MXene to establish structural defects and multiphase engineering in accordion-like TixO_(2x−1)derived from Ti_(3)C_(2)T_(x)MXene by a high-temperature hydrogen reduction process for the first *** evolution sequences are revealed to be Ti_(3)C_(2)T_(x)MXene/anatase TiO_(2)→Ti_(3)C_(2)T_(x)MXene/rutile TiO_(2)→TixO_(2x−1)(1≤x≤4)during a hydrogen reduction *** from conductance loss caused by hole motion under the action of an external electric field and heterointerfaces caused by interfacial polarization,the impedance match and EM attenuation capability of accordion-like TixO_(2x−1)absorbers derived from Ti_(3)C_(2)T_(x)MXene are superior to that of pristine Ti_(3)C_(2)T_(x)MXene/TiO_(2)***,simulated whole radar cross section(RCS)plots in different incident angular of the Ti_(3)C_(2)T_(x)MXene/rutile TiO_(2)product are lower than−20 dBm^(2),and the minimum RCS value can reach−43 dBm^(2),implying a great potential for practical applications in the EM wave ***,the relationship among charges,defects,interfaces,and EM performances in the accordion-like TixO_(2x−1)materials is systematically clarified by the energy band theory,which is suitable for the research of other MXene-derived semiconductor absorbing composites.

关键词： semiconductor oxygen defects multiphase engineering energy band microwave absorption

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Advancing sustainable ammonia synthesis with the magnetic La-doped Ti3C2O2 MXenes

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Progress in Natural science:Materials International 2024年第6期34卷 1184-1193页

作者： Koua Alain Jesus Koua Jiahe Peng Neng Li State Key Laboratory of Silicate Materials for Architectures School of Materials Science and Engineering Wuhan University of Technology Shenzhen Research Institute of Wuhan University of Technology

Developing an easy ammonia（NH3） production method to circumvent the demanding conditions of the HaberBosch process is a significant stride towards self-sufficiency in NH3production and environment *** pursuit of this goal, we carried out a theoretical approach to investigate the electrocatalytic N2reduction reaction（eN2RR） using the magnetic La-doped Ti3C2O2（La-Ti3C2O2） MXene electrocatalyst. The first principle calculations of the DFT, conducted using the Vienna Ab-Initio Storage Package（VASP） were instrumental in assessing the performance of ferromagnetic（FM） and antiferromagnetic（AFM） configurations of *** Ti3C2O2reveals limitations in eN2RR efficiency attributed to its suboptimal surface reactivity, both FM and AFM structures of La-Ti3C2O2exhibit enhanced electronic properties, enabling improved electron transfer features. La-Ti3C2O2demonstrates heightened N2adsorption capabilities and reduced energy barriers for transitional species towards NH3production, presenting superior performance to Ti3C2O2. The density of states（DOS） analysis of La-Ti3C2O2provided outcomes supporting the AFM as the credible magnetic configuration, a statement reinforced by the superior N2conversion performance in the AFM structure compared to FM. During this process of eN2RR, a study focused on the favorable pathway with less energy consumption is directed.

关键词： Ammonia production Electrocatalytic N_2RR Magnetic MXene DFT calculations

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Influence of Local Cation Order on Electronic Structure and Optical Properties of Cation-Disordered Semiconductor AgBiS_(2)

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Chinese Physics Letters 2024年第10期41卷 61-69页

作者： Xiaoyu Wang Muhammad Faizan Yuhao Fu Kun Zhou Yilin Zhang Xin He David J.Singh Lijun Zhang State Key Laboratory of Superhard Materials College of PhysicsJilin UniversityChangchun 130012China State Key Laboratory of Integrated Optoelectronics Key Laboratory of Automobile Materials of MOECollege of Materials Science and EngineeringJilin UniversityChangchun 130012China Department of Physics and Astronomy University of MissouriColumbiaMissouri 65211-7010USA

Site disorder exists in some practical semiconductors and can significantly impact their intrinsic properties both beneficially and ***,the uncertain local order and structure pose a challenge for experimental and theoretical ***,it hinders the investigation of the effects of the diverse local atomic environments resulting from the site *** employ the special quasi-random structure method to perform first-principles research on connection between local site disorder and electronic/optical properties,using cationdisordered AgBiS_(2)(rock salt phase)as an *** predict that cation-disordered AgBiS_(2)has a bandgap ranging from 0.6 to 0.8 eV without spin-orbit coupling and that spin-orbit coupling reduces this by approximately 0.3 *** observe the effects of local structural features in the disordered lattice,such as the one-dimensional chain-like aggregation of cations that results in formation of doping energy bands near the band edges,formation and broadening of band-tail states,and the disturbance in the local electrostatic potential,which significantly reduces the bandgap and *** influence of these ordered features on the optical properties is confined to alterations in the bandgap and does not markedly affect the joint density of states or optical *** study provides a research roadmap for exploring the electronic structure of site-disordered semiconductor materials,suggests that the ordered chain-like aggregation of cations is an effective way to regulate the bandgap of AgBiS_(2),and provides insight into how variations in local order associated with processing can affect properties.

关键词： stability structure ordered

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ESR-PINNs:Physics-informed neural networks with expansion-shrinkage resampling selection strategies

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Chinese Physics B 2023年第7期32卷 337-346页

作者：刘佳楠侯庆志魏建国孙泽玮 College of Intelligence and Computing Tianjin UniversityTianjin 300350China State Key Laboratory of Hydraulic Engineering Simulation and Safety Tianjin UniversityTianjin 300350China

Neural network methods have been widely used in many fields of scientific research with the rapid increase of computing *** physics-informed neural networks(PINNs)have received much attention as a major breakthrough in solving partial differential equations using neural *** this paper,a resampling technique based on the expansion-shrinkage point(ESP)selection strategy is developed to dynamically modify the distribution of training points in accordance with the performance of the neural *** this new approach both training sites with slight changes in residual values and training points with large residuals are taken into *** order to make the distribution of training points more uniform,the concept of continuity is further introduced and *** method successfully addresses the issue that the neural network becomes ill or even crashes due to the extensive alteration of training point *** effectiveness of the improved physics-informed neural networks with expansion-shrinkage resampling is demonstrated through a series of numerical experiments.

关键词： physical informed neural networks resampling partial differential equation

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Accelerated water harvesting from vapor via a bio-inspired hydrogel pattern

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National science Review 2024年第3期11卷 48-49页

作者： Lianbin Zhang Peng Wang State Key Laboratory of Material Processing and Die&Mould Technology Key Laboratory of Materials Chemistry for Energy Conversion and Storage of Ministry of Education School of Chemistry and Chemical Engineering Huazhong University of Science and Technology(HUST) School of Environmental Science and Engineering Sun Yat-sen University

Water and energy sustainability are integral parts of resource sustainability of the world. Due to water molecules' superior capability of serving as both hydrogenbond donor and acceptor, phase change of water, especially between liquid and vapor, underpins global water cycles,facilitates energy transformation and transfer, and thus helps shape the unique local weather and global climate patterns.

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Insight into slag-enhanced thermal desorption at the organo-mineral interface of clay soils

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Pedosphere 2025年第2期35卷 312-324页

作者： Juan ZHANG Xin WANG Xinyue DU Shukai FAN Hui LIU Minghua ZHANG State Key Laboratory of Advanced Metallurgy School of Metallurgical and Ecological Engineering University of Science and Technology Beijing State Key Laboratory of Mineral Processing Environmental Engineering InstituteBGRIMM Technology Group Shandong Institute of Geophysical & Geochemical Exploration College of Agricultural and Environmental Sciences University of California

Multiple active components in steel slags can optimize soil texture and catalyze the thermal desorption of refractory organic pollutants,especially polycyclic aromatic hydrocarbons （PAHs）.In this study,a safety and risk assessment was conducted on toxic metals present in collected steel slags,and the refining slag with a high content of free-Ca O from the XG iron and steel plant （XGRS） was selected and used to regulate the plasticity index （PI） of clay *** the clay soil with high liquid limit and high plasticity （CH）,the PI reduced from 34.3% to 24.8% with steel slags at an addition ratio of 10%（mass percent）,and for the clay soil with low liquid limit （CL）,the PI decreased from 22.8% to 16.5%,resulting in silt soil with optimal thermal *** thermal removal efficiency of PAHs in CH decreased from 81.9% to 74.0% at 350°C as the soil water content increased from 0 to 150 g kg-1,due to the hydration and swelling of clay minerals and the heat loss associated with dehydroxylation and *** efficiency further decreased to 68.7% using 2%（mass percent） Ca O as an additive due to the delayed dehydr（oxyl）ation of clay minerals and enhanced aromatization of soil organic *** contrast,addition of 2% high-content titania-bearing slag （HTBS） enhanced the removal efficiency of high-ring PAHs,with the efficiency increasing for 5-ring from 52.6% to 59.7% and for 6-ring from 76.6% to 81.8%.This is due to the presence of amorphous TiO2and crystalline CaTiO3in HTBS,which can degrade water to produce reactive oxygen *** 2% XGRS addition facilitated the complete removal of PAHs by air-supplemented lattice oxygen,leading to the oxidation of C–C bonds in CH to C–O,C=O,and O–C=O functional *** study provides valuable insights into the use of additives to enhance the thermal remediation of PAH-contaminated clay soils via activating oxygen species and oxidizing C–C bonds in organo-mineral complexes within clay soils.

关键词： catalytic degradation clay dehydration origanic pollutants polycyclic aromatic hydrocarbons reactive oxygen species remediation steel slags

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Topological proton regulation of interlayered local structure in sodium titanite for wide-temperature sodium storage

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Carbon Energy 2024年第10期6卷 116-129页

作者： Ru-Ning Tian Siwei Zhao Zhuoran Lv Guozhong Lu Mengnuo Fu Jingjing Chen Dajian Wang Chenlong Dong Zhiyong Mao Tianjin Key Laboratory for Photoelectric Materials and Devices School of Materials Science and EngineeringTianjin University of TechnologyTianjinChina State Key Laboratory of Rare Earth Materials Chemistry and Applications College of Chemistry and Molecular EngineeringPeking UniversityBeijingChina State Key Laboratory of High-Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghaiChina Shanghai Key Laboratory of Magnetic Resonance School of Physics and Electronic ScienceEast China Normal UniversityShanghaiChina

Developing high-capacity and high-rate anodes is significant to engineering sodium-ion batteries with high energy density and high power *** Na_(2)Ti_(3)O_(7)(NTO),with an open crystal structure,large theoretical capacity,and low working potential,is recognized as one of the prospective anodes for sodium ***,it suffers from sluggish sodiation kinetics and low(micro)structure stability triggered by a high Na+diffusion barrier and weak adhesion of[Ti_(3)O_(7)]***,the interlayered local structure of NTO is regulated to solve the above issues,in which parts of interlayered Na^(+) sites are substituted by H^(+)(Na_(2−x)H_(x)Ti_(3)O_(7)[NHTO]).Theoretical calculations prove that the NHTO offers lower activation energy for Na^(+)transports and low interlayer spacings with alleviated Na-Na repulsion and relatively flexible[Ti_(3)O_(7)]slabs to reduce fractural *** situ and ex situ characterizations of(micro)structure evolution reveal that NHTO goes through transformation between H-rich and Na-rich phases,resulting in high structure stability and microstructure *** optimal NHTO anode delivers a high capacity of 190.6 mA h g^(−1) at 0.5 C after 300 cycles and a superior high-rate stability of 90.6 mA h g^(−1) at 50 C over 10,000 cycles at room ***,it offers a capacity of 50.3 mA h g^(−1) after 1800 cycles at a low temperature of−20℃ and 195.7 mA h g^(−1) after 500 cycles at a high temperature of 40℃ at 0.5 *** developed topologically interlayered local structure regulation strategy would raise the prospect of designing high-performance layered anodes.

关键词： local structu reregulation microstructure evolution sodium storage sodium titanite wide temperature

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Cross-linkedα-amylase aggregates on Fe3O4 magnetic nanoparticles modified with polydopamine/polyethyleneimine for efficient hydrolysis of starch

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Particuology 2024年第7期90卷 98-105页

作者： Jiandong Cui Xiuming Tang Qingqing Ma Yuyan Chang Qunli Zhang Shiru Jia State Key Laboratory of Food Nutrition and Safety Laboratory of Industrial Fermentation MicrobiologyMinistry of EducationTianjin University of Science and TechnologyTianjin 300457China Key Laboratory of Biomass Chemical Engineering of Ministry of Education Zhejiang UniversityHangzhou 310027China

In this workα-amylase was immobilized on magnetic Fe3O4 nanoparticles with polyethylenimine(PEI)/polydopamine(PDA)coating or 3-aminopropyl triethoxysilane(APTES)for the first time via adsorption–precipitation–*** with the freeα-amylase,the resultant magnetic cross-linkedα-amylase aggregates(PEI/PDA-M-CLEAs and N-M-CLEAs)exhibited excellent thermal and storage stability as well as pH *** storage at 25°C for 60 days,freeα-amylase only retained 60%of its initial activity,while PEI/PDA-M-CLEAs and N-M-CLEAs retained 80%and 78%of their initial activities,***,N-M-CLEAs and PEI/PDA-M-CLEAs showed good *** 6 repeated uses,PEI/PDA-M-CLEAs and N-M-CLEAs still maintained 65%and 62%of their initial activities,***,PEI/PDA-M-CLEAs and N-M-CLEAs exhibited higher starch hydrolysis efficiency than freeα-*** maximum dextrose equivalent(DE)values of starch hydrolysis by PEI/PDA-M-CLEAs and N-M-CLEAs reached 29.24%and 28.79%within 90 min,***,the maximum DE values of starch hydrolysis by the freeα-amylase was only 27.89%even in 150 *** magnetic cross-linkedα-amylase aggregates could be introduced as effective biocatalyst for industrial applications in production of maltose syrups.

关键词： α-amylase Magnetic nanoparticles Functional modification Magnetic cross-linked enzyme aggregates Hydrolysis of starch

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Sulfate-assisted Ni/Fe-based electrodes for anion exchange membrane saline splitting

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Nano Research 2024年第7期17卷 5985-5995页

作者： Yujun Han Li Shao Yuhang Liu Guodong Li Tongzhou Wang Xuerong Zheng Jihong Li Xiaopeng Han Wenbin Hu Yida Deng School of Materials Science and Engineering Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of EducationTianjin UniversityTianjin 300072China State Key Laboratory of Marine Resource Utilization in South China Sea School of Materials Science and EngineeringHainan UniversityHaikou 570228China State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of ChemistryJilin UniversityChangchun 130012China Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) Nankai UniversityTianjin 300071China

Saline water electrolysis is an appealing strategy for hydrogen production,attracting more attention in recent ***-based electrodes exhibit promise as catalysts for saline water ***,they suffer from the inferior service life of the oxygen evolution reaction(OER).Herein,we report an oxygen-evolution electrode consisting of a sulfate-modulated nickel-iron hydroxide(NiFeOOH)affording as the catalytic active layer and Fe-Ni_(3)S_(2) as the corrosion-proof *** developed electrode only requires overpotentials of 220 and 292 mV to deliver the current density of 10 and 500 mA·cm^(−2),*** importantly,it presents long-term stability exceeding 140 and 100 h in 1 M KOH at high current densities of 500 and 1000 mA·cm^(−2),respectively,as well as 120 h for saline water electrolysis at 100 mA·cm^(−2).Experimental results reveal that the generated sulfate plays an indispensable role in improving stability and corrosion *** assembled and tested an anion exchange membrane electrolyzer with Pt/C and NiFeS/NIF as the cathode and anode,respectively,under industrial *** overall water-splitting electrolyzer achieves an impressive energy conversion efficiency of 75%±0.5%.This report offers fresh insights into the design of stable NiFe-based electrodes,which may further promote its practical applications for saline water electrolysis.

关键词： saline water electrolysis oxygen evolution reaction anode material water splitting

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