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Water-stable Mn-based MOF nanosheet as robust visible-light-responsive photocatalyst in aqueous solution

Science China Chemistry 2020年第12期63卷 1756-1760页

作者： Yejun Xiao Xiangyang Guo Tongtong Yang Junxue Liu Xuan Liu Yu Xiao Lifang Liu Taifeng Liu Sheng Ye Jun Jiang Fuxiang Zhang Can Li State Key Laboratory of Catalysis Dalian National Laboratory for Clean Energythe Collaborative Innovation Center of Chemistry for Energy MaterialsDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China Hefei National Laboratory for Physical Sciences at the Microscale CAS Center for Excellence in NanoscienceSchool of Chemistry and Materials ScienceUniversity of Science and Technology of ChinaHefei 230026China State Key Laboratory of Molecular Reaction Dynamics the Collaborative Innovation Center of Chemistry for Energy MaterialsDalian Institute of Chemical PhysicsChinese Academy of SciencesDalin 116023China University of Chinese Academy of Sciences Beijing 100049China National&Local Joint Engineering Research Center for Applied Technology of Hybrid Nanomaterials Collaborative Innovation Center of Nano Functional Materials and Applications of Henan ProvinceHenan UniversityKaifeng 475000China

Development of visible-light-responsive metal-organic frameworks(MOFs) for promising solar energy conversion has inspired continuous interest, but it still suffers from poor stability especially in aqueous solution and/or under photoirradiation due to their relatively labile coordination bonds. Herein, a new synthesized layered Mn-based MOF(Mn-TBAPy-BK) and its exfoliated twodemensional nanosheets(Mn-TBAPy-NS) are revealed to be highly stable no matter in aqueous solution with wide p H region or under visible light irradiation. As expected, the exfoliated Mn-TBAPy-NS exhibits enhanced surface area, shortened charge transfer distance, and superior charge separation with respect to the bulk one. Moreover, the as-obtained nanosheets can be employed as effective building block for nanocomposite and heterostructure assembly to further promote charge separation as well as solar hydrogen production from aqueous solution under visible light. The finding of water stable MOF nanosheet under visible light demonstrates its promising future for solar energy conversion.

关键词： metal-organic framework nanosheet water stable photocatalyst nanocomposite

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On the nature of a peculiar initial yield behavior in metastable β titanium alloy Ti-5Al-5Mo-5V-3Cr-0.5Fe with different initial microstructures

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Journal of materials Science & technology 2020年第3期38卷 135-147页

作者： Jiangkun Fan Zhixin Zhang Puyi Gao Ruimeng Yang Huan Li Bin Tang Hongchao Kou Yudong Zhang Claude Esling Jinshan Li State Key Laboratory of Solidification Processing School of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi’an710072China National&Local Joint Engineering Research Center for Precision Thermoforming Technology of Advanced Metal Materials Xi’an710072China School of Mechanics Civil Engineering and ArchitectureNorthwestern Polytechnical UniversityXi’an710129China Laboratoire d’étude des Microstructures et de Mécanique des Matériaux(LEM3) CNRS 7239Universitéde Lorraine57045MetzFrance Laboratory of Excellence on Design of Alloy Metals for low-mAss Structures(DAMAS) Universitéde Lorraine57045MetzFrance

The compressive yielding phenomenon of titanium alloys is not as focused and sufficiently ascertain as the tensile yielding *** the present work,the peculiar compressive yielding behavior and the different dynamic responses of three different initial microstructures(singleβ,clavateβand lamellarβ)were investigated in an attractive metastableβtitanium alloy Ti-5553 using electron microscopes/crystallographic calculation/crystal plastic finite element *** reveal that the distinct compressive yielding behavior,steep peaks of sudden drop in the initial stage(very small true strain 0.03)of stress loading have appeared in the compression stress-strain curves except for the lamellarβinitial *** slip is the essential mechanism of the initial yielding *** multiple-slip bands formed in the singleβinitial microstructure during the warm deformation process.A small quantity of single slip bands was observed in the deformed clavateβinitial *** abundant varied nano/ultrafineβsprecipitates were nucleated dynamically and dispersedly in all the three deformed initial *** multiple-slip bands formation and substantial nanoscaleβsresult in the highest peak of flow stress for singleβinitial *** compressive slip bands are formed early in the elastic–plastic deformation *** the increasing strain,the sample showed a significant compressive bulge,or eventually forming a strong adiabatic shear band or *** results are expected to provide a reference for the study of deformation behavior and mechanical properties of metastableβtitanium alloys.

关键词： Titanium alloy Initial yield Deformation mechanism Slip band Phase transformation Ti-5553

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Study on modulation bandwidth of GaN-based micro-light-emitting diodes by adjusting quantum well structure

Research Square

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Research Square 2022年

作者： Yin, Pan Zhi, Ting Tao, Tao Liu, Xiaoyan Institute for Electric Light Sources School of Information Science and Technology Fudan University Shanghai200433 China Key Laboratory of Advanced Photonic and Electronic Materials School of Electronic Science and Engineering Nanjing University Nanjing210046 China College of Integrated Circuit Science and Engineering National and Local Joint Engineering Laboratory for RF Integration and Micro-Packaging Technologies Nanjing University of Posts and Telecommunications Nanjing210023 China

GaN-based blue micro-light-emitting diodes (µ-LEDs) with different structures were designed, of which the effect of quantum well (QW) structure on modulation bandwidth was numerically explored. By using trapezoidal QWs, the quantum-confined Stark effect (QCSE) can be reduced, leading to an enhanced electron-hole wave function overlap, thereby increasing the recombination rate and reducing the differential carrier lifetime. In addition, the improved hole transport also creates favorable conditions for shortening the differential carrier lifetime. It is found that the − 3 dB modulation bandwidth of µ-LEDs with trapezoidal QWs was higher than those of ordinary ones. In this work, the − 3 dB modulation bandwidth of µ-LEDs can be raised to 1.13 GHz at 10 kA/cm2 © 2022, CC BY.

关键词： light emitting diodes

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Carbon-coating-increased working voltage and energy density towards an advanced Na3V2(PO4)2F3@C cathode in sodium-ion batteries

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Science Bulletin 2020年第9期65卷 702-710,M0003页

作者： Zhen-Yi Gu Jin-Zhi Guo Zhong-Hui Sun Xin-Xin Zhao Wen-Hao Li Xu Yang Hao-Jie Liang Chen-De Zhao Xing-Long Wu Key Laboratory for UV Light-Emitting Materials and Technology of Ministry of Education Northeast Normal UniversityChangchun 130024China National&Local United Engineering Laboratory for Power Batteries and Department of ChemistryNortheast Normal UniversityChangchun 130024China Center for Advanced Analytical Science School of Chemistry and Chemical EngineeringGuangzhou UniversityGuangzhou 510006China

One main challenge for phosphate cathodes in sodium-ion batteries(SIBs)is to increase the working voltage and energy density to promote its ***,an advanced Na3V2(PO4)2F3@C cathode is prepared successfully for sodium-ion full *** is revealed that,carbon coating can not only enhance the electronic conductivity and electrode kinetics of Na3V2(PO4)2F3@C and inhibit the growth of particles(i.e.,shorten the Na^+-migration path),but also unexpectedly for the first time adjust the dis-/charging plateaux at different voltage ranges to increase the mean voltage(from 3.59 to 3.71 V)and energy density from 336.0 to 428.5 Wh kg^-1 of phosphate cathode *** a result,when used as cathode for SIBs,the prepared Na3V2(PO4)2F3@C delivers much improved electrochemical properties in terms of larger specifc capacity(115.9 vs.93.5 mAh g^-1),more outstanding high-rate capability(e.g.,87.3 vs.60.5 mAh g^-1 at 10 C),higher energy density,and better cycling performance,compared to pristine Na3V2(PO4)*** for the enhanced electrochemical properties include ionicity enhancement of lattice induced by carbon coating,improved electrode kinetics and electronic conductivity,and high stability of lattice,which is elucidated clearly through the contrastive characterization and electrochemical ***,excellent energy-storage performance in sodium-ion full cells further demonstrate the extremely high possibility of Na3V2(PO4)2F3@C cathode for practical applications.

关键词： Sodium-ion batteries Cathode Working voltage Na3V2(PO4)2F3 In-situ XRD

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(INVITED)KRbAl 2 B 2 O 7 : Eu 2+ : A new blue-emitting luminescent material with good thermal stability

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Optical materials: X 2022年 13卷

作者： Hang Chen Yuhua Wang China Gansu Province Engineering Laboratory for Optical Functional Materials National& Local Joint Engineering Laboratory for Optical Conversion Materials and Technology School of Materials and Energy Lanzhou University Lanzhou 730000 China

Exploring new efficient phosphor for lighting has always been a worthwhile and necessary work. Herein, we develop a new blue-emitting luminescent material KRbAl 2 B 2 O 7 :Eu 2+ through the solid-state method. Under n-UV excitation, this phosphor can emit blue light peaking at 450 nm with FWHM about 55 nm. It owns a broad excitation spectrum covering from 250 nm to 425 nm. Two luminescent centers were identified through the analysis of crystal structure and decay times. Furthermore, the phosphor shows high thermal stability and the emission intensity remains about 81% at 425 K of that at room temperature. The thermal quenching is mainly attributed to the increase of non-radiative transition and thermally activated phonon-assisted tunneling effect at high temperature. By employing as-prepared material as blue phosphor, the fabricated white LED device can emit white light with high CRI (Ra = 85.6) and low CCT (4236 K). These results illustrate that the possibility of KRbAl 2 B 2 O 7 as a blue-emitting phosphor for practical application.

关键词： KRbAl 2 B 2 O 7 Blue-emitting White LED Photoluminescence

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High-efficiency preparation of large-sized MXene nanosheets for flexible piezoresistive sensors with high sensitivity and wide strain range

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Chemical engineering Journal 2025年 515卷

作者： Zhang, Fan Zhang, Xiaobo Yang, Tingting Shi, Kaixiang Han, Ying Song, Xiaolei Yao, Hongyan Song, Ying Key Laboratory of Advanced Structural Materials Ministry of Education College of Materials Science and Engineering Changchun University of Technology Changchun130012 China National & Local Joint Engineering Laboratory for Synthesis Technology of High-Performance Polymer College of Chemistry Jilin Univerity 2699 Qianjin Street Changchun130012 China Guangzhou Key Laboratory of Clean Transportation Energy Chemistry School of Chemical Engineering and Light Industry Guangdong University of Technology Guangzhou510006 China

The concurrent attainment of high sensitivity and broad response range in piezoresistive sensors remains a critical challenge. While single-layer MXene characterized by large interlayer spacing, high specific surface area, flexibility, and superior electrical conductivity—holds promise for enhancing sensor performance, conventional synthesis methods suffer from inefficient exfoliation and low yield, hindering practical applications. Herein, we propose a novel strategy to synthesize single-layer MXene nanosheets via a mixed-acid (HF/HCl) etching system with lithium chloride (LiCl) as an intercalation agent. This approach achieved remarkable exfoliation efficiency (up to 70 %) while endowing MXene with a wrinkled morphology and an expanded specific surface area. Subsequently, MXene/polyimide (MXene/PI) composite aerogels were fabricated by integrating MXene nanosheets into a PI flexible substrate, serving as pressure-sensitive materials. The composite aerogels exhibited a highly aligned lamellar microstructure, synergizing MXene's conductivity with PI's flexibility, thereby significantly improving both sensitivity and response range. At an optimal MXene content of 14 %, the sensor demonstrated exceptional performance: a wide response range (0–27.1 kPa) and a high sensitivity of 2.65 kPa−1 under a large applied stress of 27.1 kPa, surpassing existing counterparts. Further applications revealed the sensor's capability in precisely detecting physiological signals (e.g, finger, wrist, and elbow movements). Additionally, the composite aerogel showcased multifunctionality, including superior thermal insulation (>90 % heat retention), efficient electromagnetic interference (EMI) shielding (45 dB at 10 GHz), and oil–water separation efficacy (>98 % for non-polar solvents). These findings highlight the material's potential in wearable electronics, environmental remediation, and EMI shielding technologies, paving the way for next-generation multifunctional sensors. © 2025 Elsev

关键词： Nanosheets

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Self-healable and stretchable electrochemical sensor for sweat glucose detection

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Talanta 2025年 295卷 128428页

作者： Gongwei Tian Jianhui Chen Dan Yang Cuiyuan Liang Qinyi Zhao Yan Liu Weihong Lu Dianpeng Qi Key Laboratory of Science and Engineering for the Multi-Modal Prevention and Control of Major Chronic Diseases Ministry of Industry and Information Technology Zhengzhou Research Institute of Harbin Institute of Technology Zhengzhou 450000 PR China School of Medicine and Health Harbin Institute of Technology Harbin 150001 PR China MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage National and Local Joint Engineering Laboratory for Synthesis Transformation and Separation of Extreme Environmental Nutrients School of Chemistry and Chemical Engineering Harbin Institute of Technology Harbin 150001 PR China

Wearable sensing devices provide a promising approach for non-invasive health detection. However, most flexible devices are inevitably susceptible to wear and mechanical degradation in practical applications due to stretching, cutting, or overuse, resulting in device malfunction. Therefore, it is necessary to develop sensing devices with self-healing and stretchable capabilities. Here, an in-situ self-healing and stretchable sweat glucose sensor is fabricated by depositing Au on the synthetic self-healable PDMS 0.9 -IPDI elastomer and modifying polypyrrole/glucose oxidase on the sensing position, respectively. This sensor can recover electromechanical properties through dynamic hydrogen bonds after fracture and self-healing 4 h at room temperature, and maintain stable sensing properties under 50 % strain, which satisfies the strain required by human skin in daily activities. In addition, the modified polypyrrole film on the Au electrode increases the electrochemically active area of the working electrode by 3–4 times and the sensor exhibits a sensitivity of 62.60 μA mM −1 cm −2 in the linear range of 0–1 mM, with the detection limit is as low as 12.58 μM. Furthermore, the sensor can accurately and reliably detect the glucose content in human sweat samples, providing a novel approach for the practical application of glucose sensors.

关键词： Glucose oxidase High stretchability Polypyrrole Self-healing electrochemical sensor Sweat glucose monitoring

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Hydroxypropyl-β-cyclodextrin: a polygonal warrior unlocking the excellent room/low temperature performance of hydrated vanadium oxide in aqueous zinc ion batteries

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Chemical engineering Journal 2025年 517卷

作者： Jiang, Ziyan Zhou, Peng Zhang, Yuchen Hu, Teli Feng, Yaxin Liu, Baohua Hu, Hai Yuan, Boyu Huang, Zhifeng Wang, Qinghong Liu, Li National Base for International Science & Technology Cooperation National Local Joint Engineering Laboratory for Key Materials of New Energy Storage Battery Hunan Province Key Laboratory of Electrochemical Energy Storage and Conversion Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education School of Chemistry Xiangtan University Xiangtan411105 China School of Chemistry and Materials Science Jiangsu Normal University Xuzhou221116 China Jiangsu Key Laboratory of Advanced Laser Materials and Devices School of Physics and Electronic Engineering Jiangsu Normal University Jiangsu Xuzhou221116 China

Vanadium-based oxides, particularly hydrated forms like V2O5·nH2O, have high theoretical capacities as cathode materials for aqueous zinc ion batteries (AZIBs). However, the rapid capacity decay caused by the dissolution in aqueous electrolyte and the structural collapse caused by consecutive ion insertion/extraction during cycling significantly hinder their practical application. Herein, hydroxypropyl-β-cyclodextrin modified V2O5·nH2O (HP-β-CD-VOH) is synthesized by a simple one-step hydrothermal method. Hydroxypropyl-β-cyclodextrin (HP-β-CD) molecules are coated on the surface of V2O5·nH2O and partially inserted into the V[sbnd]O interlayers. In HP-β-CD-VOH composite, HP-β-CD plays roles of expanding interlayer spacing, locking in interlayer crystalline water, supporting layered structure, inhibiting dissolution of vanadium, and improving wettability with aqueous electrolyte, just like a polygonal warrior. So, HP-β-CD-VOH shows rapid ion diffusion kinetics and robust structural stability. HP-β-CD-VOH exhibits excellent electrochemical performance at both room temperature and low-temperature environments (e.g., at 25 °C, 301.0 mAh g−1 at 0.5 A g−1 and at a low temperature of −15 °C, 170.8 mAh g−1 at 0.1 A g−1). Importantly, there is virtually no degradation of capacity with long cycles at 25 °C or − 15 °C. This work proposes an effective strategy to improve the room/low-temperature electrochemical performance of vanadium-based cathode materials in AZIBs. © 2025 Elsevier B.V.

关键词： Hydration

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Amorphous LiBO 2 -assisted cathode-electrolyte-interphase enhancing the reversibility of commercial nickel-rich layered cathodes

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Chinese Chemical Letters 2025年

作者： Baiyao Gan Lijun Xiong Haotian Gong Lishan Yang Yahui Yang Lixiong Bai Ting Long Jian Zhu Jian Yang Key Laboratory of Chemical Biology & Traditional Chinese Medicine Research (Ministry of Education of China) National and Local Joint Engineering Laboratory for New Petrochemical Materials and Fine Utilization of Resources Key Laboratory of the Assembly and Application of Organic Functional Molecules of Hunan Province Key Laboratory of Light Energy Conversion Materials of Hunan Province Hunan Normal University Changsha 410081 China Minmetals New Energy Materials (Hunan) Co. Ltd. Changsha 410205 China Key Laboratory of Colloid and Interface Chemistry Ministry of Education School of Chemistry and Chemical Engineering Shandong University Ji’nan 250100 China

The nickel-rich layered cathode materials (LiNi x Co y Mn 1-x-y O 2 ) in lithium-ion batteries suffer from labile surface reactivity, leading to the formation of residual lithium impurities and the induction of interfacial side reactions, ultimately degrading battery performance. Here, A controlled reaction between residual lithium and the glassy material H 3 BO 3 on the surface of commercial LiNi 0.82 Co 0.12 Mn 0.06 O 2 cathode materials converts into a protective fast ionic conductor layer. It was observed that sintering temperatures distinctly influenced the composition and structure of interface coating, subsequently affecting electrochemical properties of cathode. Notably, upon treatment at a relatively low temperature of 300°C, the surface of sample was enveloped in an amorphous LiBO 2 layer, which effectively alleviates interfacial side reactions, stabilizes the crystal structure and enhances lithium-ion transport kinetics. Furthermore, during cycling, the amorphous LiBO 2 coating facilitates the formation of a stable cathode electrolyte interphase layer enriched with LiF, Consequently, the material exhibits exceptional electrochemical performance, balancing high capacity and excellent cycling stability. This interfacial engineering strategy, compatible with industrial-scale processing, provides a viable pathway to enhance the durability of nickel-rich cathodes for high-energy-density batteries.

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Study on the performance regulation mechanism of in-situ Bi doping on the degradation of tetracycline by Prussian blue analogue activated PMS catalytic system

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Journal of Water Process engineering 2025年 76卷

作者： Zhang, Jing Song, Zhi Liu, Boxia Han, Dongxu Zhang, Xiayan Liu, Jialu Huang, Yeqiong Xing, Chuhan College of Chemistry and Chemical Engineering North Minzu University Yinchuan 750021 China Ningxia Key Laboratory of Solar Energy Chemical Conversion Technology Northern University for Nationalities Yinchuan 750021 China Key Laboratory of Chemical Engineering and Technology State Ethnic Affairs Commission Northern University for Nationalities Yinchuan 750021 China College of Biological Sciences and Engineering North Minzu University Yinchuan 750021 China Key Laboratory of Special Functional Materials Ministry of Education National and Local Joint Engineering Research Center for High-efficiency Display and Lighting Technology School of Nanoscience and Materials Engineering Henan University Henan Kaifeng 475004 China

Prussian blue analogues (PBAs) show potential in pollutant degradation, but are often limited by crystal structure regulation and insufficient exposure of active sites. In this study, Bi doping was used to synergistically optimize the crystal structure and electronic environment of CuFe-PBA and construct an efficient CuFe-Bi-3 catalyst for peroxymonosulfate (PMS) activated degradation of tetracycline (TC). The introduction of Bi induces crystal plane reconstruction, enhances the Cu²⁺/Cu⁺ and Fe³⁺/Fe²⁺ cycles, and increases the exposure of active sites. The TC degradation rate of CuFe-Bi-3 increased from 72.2 % to 92.1 % within 80 min, and the reaction rate constant increased from 0.01133 to 0.02631 min⁻¹. Mechanistic studies have shown that Bi regulation promotes the directional generation and utilization of ¹O2, constructing a synergistic oxidation pathway dominated by non-free radicals. A comprehensive comparison of EPR signals for various reactive oxygen species showed that the ¹O2 signal was the strongest, significantly higher than O2^•-, •OH and SO4^•-. The system has good stability in various water qualities and a wide pH range, and toxicity assessment also shows that it can effectively reduce the toxicity of degradation products. This study provides theoretical support and application reference for the structure-electronic regulation of PBAs catalysts and Bi doping to construct an environmentally friendly and efficient PMS activation system in a complex water environment.

关键词： Non-radical mechanism Peroxymonosulfate Prussian blue analogs Reactive oxygen species

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