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Single-Molecule Confinement Induced Intrinsic Multi-Electron Redox-Activity to Enhance Supercapacitor Performance

Energy & Environmental Materials 2023年第4期6卷 227-238页

作者： Su Yang Meiling Wang Yong Zhang Pinyi He Wenhua Cong Chongji Wang Qiankun Yang Xuguang Liu Tian Wang Xianming Zhang Jiadong Zhou College of Materials Science and Engineering Taiyuan University of TechnologyTaiyuan 030024China Key Lab of Advanced Optoelectronic Quantum Architecture and Measurement(Ministry of Education) Beijing Key Lab of Nanophotonics&Ultrafine Optoelectronic Systemsand School of PhysicsBeijing Institute of TechnologyBeijing 100081China School of Materials Science and engineering Central South UniversityChangsha 410083China Department of Chemistry National University of Singapore3 Science Drive 3117543Singapore Key Laboratory of Interface Science and Engineering in Advanced Materials Ministry of Education (Taiyuan University of Technology)Taiyuan 030024China

Aggregation of polyoxometalates(POM)is largely responsible for the reduced performance of POM-based energy-storage *** address this challenge,here,the precise confinement of single Keggin-type POM molecule in a porous carbon(PC)of unimodal super-micropore(micro-PC)is *** precise single-molecule confinement enables sufficient activity center exposure and maximum electron-transfer from micro-PC to POM,which well stabilizes the electron-accepting molecules and thoroughly activates its inherent multi-electron *** particular,the redox-activities and electron-accepting properties of the confined POM molecule are revealed to be super-micropore pore size-dependent by experiment and spectroscopy as well as theoretical ***,the molecularly dispersed POM molecules confined steadily in the“cage”of micro-PC exhibit unprecedented large-negative-potential stability and multiple-peak redox-activity at an ultra-low loading of~11.4 wt%.As a result,the fabricated solid-state supercapacitor achieves a remarkable areal capacitance,ultrahigh energy and power density of 443 mF cm^(-2),0.12 mWh cm^(-2)and 21.1 mW cm^(-2),*** work establishes a novel strategy for the precise confinement of single POM molecule,providing a versatile approach to inducing the intrinsic activity of POMs for advanced energy-storage systems.

关键词： intrinsic redox-activity polyoxometalates single-molecule confinement supercapacitor

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Dynamic Color Regulation of the Lycaenid Butterfly Wing Scales

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Journal of Bionic engineering 2024年第5期21卷 2395-2408页

作者： Mingxia Sun Weihao Meng Haiwei Yin Lingjie Fan Lei Shi Gregory S.Watson Jolanta A.Watson Jingxia Wang Lei Jiang Aiping Liang Tianjin Key Laboratory of Conservation and Utilization of Animal Diversity College of Life SciencesTianjin Normal UniversityTianjin300387China Laboratory of Bioinspired-Smart Interface Sciences Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing100190China Shanghai Ideaoptics Corporation Shanghai200433China Key Laboratory of Micro&Nano Photonic Structures(MOE)and Key Laboratory of Surface Physics Department of PhysicsFudan UniversityShanghai200433China School of Science Technology and EngineeringUniversity of the Sunshine CoastFraser Coast CampusHervey BayQLD4655Australia Key Laboratory of Zoological Systematics and Evolution Institute of ZoologyChinese Academy of SciencesBeijing100101China

Butterfly coloration originates from the finely structured scales grown on the underlying wing *** researchers who study butterfly scales are focused on the static optic properties of cover scales,with few works referring to dynamic optical properties of the ***,the dynamic coloration effect of the multiple scales was studied based on the mea-surements of varying-angle reflection and the characterization of scale flexibility in two species of Lycaenid,Plebejus argyrognomon with violet wings and Polyommatus erotides with blue *** explored the angle-dependent color changeability and the color-mediating efficiency of wing *** was found that the three main kinds of flexible scales(cover,ground and androconia scales)were asynchronously bent during wing rotation,which caused the discoloration *** three layers of composite scales broaden the light signal when compared to the single scale,which may be of great significance to the recognition of ***,the androconia scales were shown to strongly contribute to the overall wing *** cover scale coloration was ascribed to the coherence scattering resulted from the short-range order at intermediate spatial frequencies from the 2D Fourier power *** findings are expected to deepen the understanding of the complex characteristics of biological coloration and to provide new inspirations for the fabrication of biomimetic flexible discoloration materials.

关键词： Butterfly scale Angle-dependent reflection Color-mediating efficiency Structural Color

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Bismuthene quantum dots integrated D-shaped fiber as saturable absorber for multi-type soliton fiber lasers

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Journal of Materiomics 2023年第1期9卷 183-190页

作者： Han Pan Hongwei Chu Ying Li Zhongben Pan Jia Zhao Shengzhi Zhao Weichun Huang Dechun Li School of Information Science and Engineering and Key Laboratory of Laser and Infrared System of Ministry of EducationShandong University72 Binhai RoadQingdao266237China Key Laboratory of Colloid and Interface Chemistry of State Education Ministry School of Chemistry and Chemical EngineeringShandong University27 Shanda South RoadJinan250100China School of Chemistry and Chemical Engineering Nantong University9 Seyuan RoadNantong226019China

In the present work,the uniformly sized bismuthene quantum dots(BiQDs)with an average diameter of 26 nm were fabricated via the solvothermal *** transferring the BiQDs onto the plane of micro-machined D-shaped fiber(DSF),a new type of saturable absorber(SA)was successfully *** on the evanescent field effect of D-shaped fiber,the prepared SA exhibits excellent saturable absorption properties with the maximum modulation depth of 5.1%at around 1.5μ*** further investigate its potential applications in ultrafast photonics,we demonstrated passive mode-locking operation in the erbium-doped fiber laser(EDFL)with BiQDs/*** conventional soliton pulses with duration of 835 fs at the repetition rate of 9.23 MHz and dissipative soliton pulses with duration of 575 fs at the repetition rate of 7.83 MHz were generated *** addition,stable bound state of solitons with the pulse duration of 1.04 ps and sub-pulse time interval of 15.9 ps were also obtained based on the conventional soliton state by adjusting the pump power and polarization *** work reveals the great potential and capacity of BiQDs/DSF-SA in soliton mode-locking operations and promotes the explorative investigation of bismuth-based optoelectronic devices.

关键词： Bismuthene quantum dots Saturable absorber Soliton mode-locking Bound-state solitons Ultrafast photonics

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Recent advances of amorphous-phase-engineered metal-based catalysts for boosted electrocatalysis

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Journal of Materials science & Technology 2022年第32期127卷 1-18页

作者： Jiakang Tian Yongqing Shen Peizhi Liu Haixia Zhang Bingshe Xu Yanhui Song Jianguo Liang Junjie Guo Key Laboratory of Interface Science and Engineering in Advanced Materials Ministry of EducationTaiyuan University of TechnologyTaiyuan 030024China Materials Institute of Atomic and Molecular Science Shaanxi University of Science and TechnologyXi’an 710021China College of Mechanical and Vehicle Engineering Taiyuan University of TechnologyTaiyuan 030024China

Amorphous metal-based catalysts(AMCs)have sparked intense research interests in the field of electrocatalysis elicited by their hallmark features such as unlimited volume and morphology,manipulated electronic structures,enriched defects,and unsaturated surface atom ***,the manipulation of the amorphous phase in metal-based catalysts is so far impractical,and thus their electrocatalytic mechanism yet remains *** this review,the latest advances in AMCs are systematically reviewed,covering amorphous-phase engineering strategy,structure manipulation,and amorphization of various material categories for ***,a series of applications of AMCs in electrocatalysis for the oxygen reduction reaction(ORR),hydrogen evolution reaction(HER),and oxygen evolution reaction(OER)are summarized based on the classification criteria of ***,we put forward current challenges that have not yet been clarified in the field of AMCs,and propose possible solutions,particularly from the perspective of the evolution of electron *** is expected to promote the understanding of the amorphization-catalysis relationship and provide a guideline for designing high-performance electrocatalysts.

关键词： Amorphous metal-based catalysts Electrocatalysis Electron microscopy interface engineering Surface engineering Defect engineering Strain engineering

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engineering Cu_(1.96)S/Co_(9)S_(8) with sulfur vacancy and heterostructure as an efficient bifunctional electrocatalyst for water splitting

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Journal of Materials science & Technology 2023年第23期154卷 1-8页

作者： Yuanhua Xiao Ya Shen Dangcheng Su Shiwei Zhang Jinlin Yang Dafeng Yan Shaoming Fang Xuezhao Wang Key Laboratory of Surface & Interface Science and Technology/College of Material and Chemical Engineering Zhengzhou University of Light Industry Zhengzhou 450002 China Department of Chemistry National University of Singapore 3 Science Drive 3 Singapore 117543 Singapore College of Chemistry and Chemical Engineering Hubei University Wuhan 430062 China College of Chemical and Food Zhengzhou University of Technology Zhengzhou 450044 China

Defect and interface engineering have been recognized as efficient strategies for developing high-performance ***,it is still challenging to couple defect and interface engineering in transition metal sulfides and understand their dynamic evolution process during ***,we developed one-step pyrolysis of bimetallic sulfide to construct S vacancy-rich Cu_(1.96)S/Co_(9)S_(8) heterostructure by controlling the critical decomposition *** as-synthesized Cu_(1.96)S/Co_(9)S_(8) exhibits excellent bifunctional electrocatalytic performance,with a low overpotential of 99 and 200 mV at 10 mA cm−2 towards hydrogen evolution reaction(HER)and oxygen evolution reaction(OER)in 1.0 mol/L KOH electrolyte,respectively.A symmetric two-electrode cell with Cu_(1.96)S/Co_(9)S_(8) delivered a current density of 10 mA cm^(−2) at a low voltage of 1.43 V and showed long-term stability for 200 h.A series of in/ex-situ techniques revealed that the electrochemical reconfiguration only appeared in the OER process,resulting in the CoOOH/CuO and SO42−species promoting OER ***,the S vacancy and heterostructure interface in Cu_(1.96)S/Co_(9)S_(8) were proved to optimize the electronic structure and the adsorption of intermediates for HER by density function theory(DFT)*** work provides a promising strategy to construct metal sulfides with rich defects and heterogeneous interfaces and understand their dynamic evolution process for electrochemical storage and conversion devices.

关键词： Cu_(1.96)S/Co_(9)S_(8) S vacancy Heterostructure Overall water-splitting

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Broadband orange-emitting Sr_(3)Si_(8)O_(4)N_(10):Eu^(2+)phosphor discovered by a modified single-particle-diagnosis approach

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Journal of Advanced Ceramics 2023年第4期12卷 734-746页

作者： Le Wang Guozhen Ding Shuxing Li Shiro Funahashi Takashi Takeda Lu Yin Pei Liang Naoto Hirosaki Rong-Jun Xie College of Optical and Electronic Technology China Jiliang UniversityHangzhou 310018China Fujian Key Laboratory of Surface and Interface Engineering for High Performance Materials College of MaterialsXiamen UniversityXiamen 361005China Phosphors Group National Institute for Materials ScienceTsukuba 305-0035Japan State Key Laboratory of Physical Chemistry of Solid Surfaces Xiamen UniversityXiamen 361005China

Discovery of new phosphors with desired properties is of great significance for developing high optical quality solid-state *** single-particle-diagnosis approach is an effective way to search novel phosphors by analyzing tiny single crystals screened from the fired powder *** this work,a broadband orange-emitting phosphor of Sr(3)Si_(8)O_(4)N_(10):Eu^(2+)for solid state lighting was discovered by this *** new oxonitridosilicate crystallizes in the monoclinic space group of P2_(1)/n(No.14)with cell parameters of a=4.8185 A,b=24.2303 A,c=10.5611 A,β=90.616°,and Z=*** crystal structure of SrsSigO4Nio was determined from the single-crystal X-ray diffraction(XRD)data of a single crystal,which is made up of a three-dimensional framework consisting of vertex-sharing SiN_(4)and SiN_(3)O ***^(2+)ions occupy five crystallographic sites and have coordination numbers between 6 and 8 with one ordered Sr and other four disordered Sr *** multiple Sr sites lead to a broadband emission centered at 565-600 nm and a bandwidth of 128-138 *** internal and external quantum efficiencies(IQE/EQE)of the title phosphor are 48.6%and 29.1%under 450 nm excitation,*** improve the accuracy and speed of distinguishing phosphor particles in fired powder mixtures,a microscopic imaging spectroscopy is developed and demonstrated to modify the single-particle-diagnosis method.

关键词： oxonitridosilicate phosphor photoluminescence(PL) solid-state lighting imaging spectroscopy

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Effect of sodium alginate/phosphate-stabilized amorphous calcium carbonate nanoparticles on chitosan membranes

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Food Bioscience 2022年第2期46卷 617-630页

作者： Bin Nie Hong Wang Yanwei Zhang Chaohui Rao Huifang Wang Xianghua Gao Wenfeng Li Baolong Niu College of Materials Science and Engineering Taiyuan University of TechnologyTaiyuan030024PR China Key Laboratory of Interface Science and Engineering in Advanced Materials Taiyuan University of TechnologyMinistry of EducationTaiyuan030024PR China

Biodegradable chitosan(CS)films can meet the demand for sustainable ***,the performance of pure CS membrane still exists a particular gap compared with the traditional *** nanomaterials with the controllable release are added to improve its physical and chemical ***,a series of CS/phosphate-stabilized amorphous calcium carbonate(CS/ACCP)and CS/sodium alginate/ACCP(CS/Alginate/ACCP)composite films were prepared by the flow *** effects of ACCP and Alginate/ACCP nanoparticles on the physical and chemical properties of the composite membrane were *** results showed that the composite nanoparticles could significantly improve CS film’s compactness,hydrophobicity,and mechanical properties and enhance its ultraviolet(UV)blocking ability,water resistance,and water vapor blocking *** the number of nanoparticles was 8%,the mechanical properties of the CS composite membrane reached optimum value,and the comprehensive performance was *** addition,the controlled-release properties of CS composite membranes were also studied,and the antioxidant,antibacterial,biocompatibility,and fresh-keeping effects of the composite membranes were *** results indicated that the CS composite membranes had not only excellent bacteriostatic(72%)properties(Escherichia coli)but also presented well fruit preservation(15 days)properties(sugar orange).In particular,the controlled release range of CS composite membrane at 12 h was between 30%and 90%,which provided a theoretical basis for its use as an edible ***,based on ACCP and Alginate/ACCP nanoparticles,CS composite membranes with more excellent application value in the biological field were prepared through further optimization design.

关键词： Calcium carbonate nanoparticles Sodium alginate Chitosan membranes Crosslinking mechanism Controlled release properties Food fresh-keeping film

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The flame retardancy and mechanical properties of waste polyester fabric/hemp stalk composites modified with piperazine pyrophosphate and ammonium polyphosphate 2

The flame retardancy and mechanical properties of waste poly...

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2nd International Conference on Frontier Materials, ICFM 2023

作者： Li, F. Shi, Y.R. Liu, J.T. Cui, Z. Lu, Y.Z. Niu, M. Xue, B.X. College of Textile Engineering Taiyuan University of Technology Taiyuan030024 China Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering Taiyuan030032 China Key Laboratory of Interface Science and Engineering in Advanced Materials of Ministry of Education China

The piperazine pyrophosphate (PAPP) and ammonium polyphosphate (APP) were employed to enhance the flame retardancy of waste polyester/hemp stalk composites. And the impact of PAPP/APP flame retardants on the flame retardancy and mechanical properties of waste polyester/hemp stalk was investigated. The results indicated that the PAPP/APP combination offered superior flame retardancy, with minimal impact on the composites' bending property. Notably, when the total addition of PAPP/APP was 25%, with a mass ratio of 1 to 1, the limiting oxygen index (LOI) value of the PAPP/APP/waste polyester/hemp stalk composite material increased significantly from 18.8% to 27.1%, achieving the flame retardant level. Correspondingly, the vertical combustion level attained V-0 level, and the charring rate at 600°C escalated from the initial 25.8% to 32.5%. Remarkably, both the bending strength and modulus of PAPP/APP/waste polyester/hemp stalk composites remained stable. © 2023 Published under licence by IOP Publishing Ltd.

关键词： Bending strength

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Build in seconds:Small-molecule hydrogels of self-assembled tryptophan derivatives

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Chinese Chemical Letters 2023年第8期34卷 219-222页

作者： Xianwen Song Jun Zheng Shunmei He Yilin Liu Shutong Yang Qiang Li Chuntai Liu Zequn Zhang Xi Liu Chunyan Deng Yi Zhang Hunan Provincial Key Laboratory of Micro&Nano Materials Interface Science College of Chemistry and Chemical EngineeringCentral South UniversityChangsha 410083China Beijing National Laboratory for Molecular Sciences(BNLMS) CAS Key Lab of ColloidInterface and Chemical Thermodynamics Institute of ChemistryChinese Academy of SciencesBeijing 100190China Key Laboratory of Materials Processing and Mold(Zhengzhou University) Ministry of EducationZhengzhou 450002China Department of Gastrointestinal Surgery The Third Xiangya Hospital of Central South UniversityChangsha 410013China

Small-molecule hydrogels based on amino acid derivatives have promising applications in many biological fields,including cell culture,drug delivery,and tissue *** these hydrogels have been widely reported to have low cytotoxicity,biocompatibility,and tunable bioactivity,problems such as harsh preparation conditions and complex material design hinder their ***,by adjusting pH to induce non-covalent interactions between small-molecule tryptophan derivatives(N-[(phenylmethoxy)carbonyl]-L-tryptophan,Mw:338.35),we developed a self-assembled three-dimensional network hydrogel that can be rapidly formed in *** the supramolecular self-assembly mechanism of the hydrogels was also investigated in detail through experimental characterizations and density functional theory ***-prepared hydrogels also exhibit reversible pH-stimulated response and self-healing *** study details a research process for the simple and rapid preparation of tryptophan derivative-based hydrogels,which provides more reference ideas for the future development of materials based on other amino acid derivatives.

关键词： Small-molecule Hydrogel Tryptophan derivatives Self-assemble Self-healing Density functional theory

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Water adsorption performance of UiO-66 modified by MgCl_(2) for heat transformation applications

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Chinese Physics B 2022年第11期31卷 585-592页

作者： Jia-Li Liu Guo-Dong Fu Ping Wu Shang Liu Jin-Guang Yang Shi-Ping Zhang Li Wang Min Xu Xiu-Lan Huai Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface Science School of Mathematics and PhysicsUniversity of Science and Technology BeijingBeijing 100083China School of Energy and Environmental Engineering University of Science and Technology BeijingBeijing 100083China Institute of Engineering Thermophysics Chinese Academy of SciencesBeijing 100190China

UiO-66 is a potential material for adsorption heat transformation(AHT)with high specific surface area,and excellent thermal and chemical ***,the low water adsorption capacity of UiO-66 in the low relative pressure ran... 详细信息

关键词： adsorption heat transformation UiO-66 water vapor adsorption MgCl_(2)

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