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Journal of materials Science & Technology 2023年第28期159卷 33-40页

作者： Liming Yang Tao Yang Enhui Wang Xiangtao Yu Kang Wang Zhentao Du Sheng Cao Kuo-Chih Chou Xinmei Hou institute for Carbon Neutrality University of Science and Technology BeijingBeijing 100083China MOE Key Laboratory of New Processing Technology for Non-ferrous Metals and materials Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured MaterialsGuangxi UniversityNanning 530004China

Aiming to design and prepare non-noble metal electrocatalysts for hydrogen production at high current density(HCD),NiCoP@FeNi LDH hierarchical nanosheets were deposited on nickel foam progressively us-ing a hydrothermal-phosphorization-electrodeposition *** hydrogen evolution reaction(HER)and oxygen evolution reaction(OER),NiCoP@FeNi LDH/NF requires only 195 and 230 mV overpotentials to reach 1000 mA cm−2,*** overall water splitting,only 1.70 V is required at 1000 mA cm−*** is the largest value for non-noble metal-based electrocatalysts reported so far at *** hierarchi-cal structure exhibits good electron transport capability and the porous-macroporous structure enhances the gas release rate,resulting in enhanced hydrogen production at ***,the synergistic effect of NiCoP and FeNi LDH contributes to the adsorption-desorption equilibrium of intermediate radicals dur-ing the reaction process and ultimately enhances the catalytic *** work provides useful direction for industrial-scale hydrogen production applications at HCD.

关键词： High-current-density Overall water splitting Hydrogen evolution reaction Oxygen evolution reaction

High Performance Supercapacitors from hierarchical porous Carbon Aerogels Based on Sliced Bread

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Chinese Journal of Chemistry 2017年第5期35卷 699-706页

作者： Pin Hao Guanwei Cui Xifeng Shi Junfeng Xie Xinyuan Xia Yuanhua Sang C. P. Wong Hong Liu Bo Tang College of Chemistry Chemical Engineering and Materials Science Institute of Materials and Clean Energy Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong Key Laboratory of Molecular and Nano Probes Ministry of Education Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals Shandong Normal University Jinan Shandong 250014 China State Key Laboratory of Crystal materials Shandong University Jinan Shandong 250100 China School of materials Science and Engineering Georgia Institute of Technology Atlanta GA 30032 the United States

Supercapacitor electrodes with porous structure based on renewable,eco-friendly and cost-effective materials have caused extensive concern in energy storage *** bread,the common food ingredient,mainly containing glucose polymers,can be a promising candidate to fabricate porous supercapacitor *** porous carbon aerogels by using sliced bread as the raw material were synthesized through a carefully controlled aerogel carbonization-activation ***,the specific surface area and the pore size distribution of the porous carbon were controlled by the activation temperature,which result in the varied performance of the carbon aerogel as a *** investigation measurements revealed that the hierarchical porous carbon aerogel shows an excellent capacitor behavior for construction of a symmetric supercapacitor,which demonstrated a high specific capacitance of 229 F·g-1 at discharge current of 0.2 A·*** addition,the fabricated supercapacitor displayed excellent capacitance retention of 95.5% over 5000 cycles.

关键词： carbon aerogel sliced bread supercapacitor energy density cycling stability

Soft-template synthesis of hierarchically porous structured polydimethylsiloxane toward flexible capacitive pressure sensor

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中国科学:技术科学英文版 2023年第9期66卷 2696-2706页

作者： HE ShiXue WU Jian DUAN YanHao SU BenLong LIU ShouYao TENG Fei WANG YouShan School of Mechatronics Engineering Harbin Institute of TechnologyHarbin 150001China National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of TechnologyHarbin 150090China Center for Rubber Composite materials and Structures Harbin Institute of TechnologyWeihai 264209China

Flexible pressure sensors play an important role in the field of monitoring, owing to their inherent safety and the fact that they are embedded at the material level. Capacitive pressure sensors have been proven to be quite versatile, with the ability to change the sensitivity and monitoring range by modifying the pore structure of the dielectric layer(elastic modulus). In this paper, capacitive pressure sensors are devised, comprising hierarchical porous polydimethylsiloxane. Due to the inherent hollow and hierarchical micropore structure, the capacitive pressure sensor allows operation at a wider pressure range(~1000 kPa) while maintaining sensitivity(6.33 MPa-1) in the range of 0–300 k Pa. Subsequently, the capacitance output model of the sensor is optimized, which provides an overall approximation of the experimental values for the sensor performance. Additionally, the signal response of the“break up the whole into parts”(by analysis of the whole sensor in parts) is simulated and outputted by the finite element analysis. The simplified analysis model provides a good understanding of the relationship between the local pressure and the signal response of the pressure sensor. For practical applications, seal monitoring and rubber wheel pressure array system are tested, and the proposed sensor shows sufficient potential for application in large deformation elastomer products.

关键词： hierarchically porous structured flexible pressure sensor capacitive response mechanism hydrogel/silicone rubber emulsion

Rational design of nitrogen doped hierarchical porous carbon for optimized zinc-ion hybrid supercapacitors

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Nano Research 2019年第11期12卷 2835-2841页

作者： Penggao Liu Yang Gao Yangyang Tan Weifang Liu Yanping Huang Jun Yan Kaiyu Liu Hunan Provincial Key Laboratory of Chemical Power Sources College of Chemistry and Chemical EngineeringCentral South UniversityChangsha410083China Key Laboratory of Energy materials Chemistry Ministry of EducationKey Laboratory of Advanced Functional MaterialsAutonomous RegionInstitute of Applied ChemistryXinjiang UniversityXinjiang830046China College of materials Science and Engineering Fuzhou UniversityFuzhou350108China

Aqueous rechargeable zinc-ion hybrid supercapacitors are considered to be a promising candidate for large-scale energy storage devices owing to their high safety,long life,and low *** this paper,a nitrogen doped hierarchical porous carbon is evaluated as the cathode for aqueous rechargeable zinc-ion hybrid *** from the synergistic merits of excellent structural features of N-HPC and tiny zinc dendrite of Zn anode in ZnSO4 electrolyte,the zinc-ion hybrid supercapacitor exhibits excellent energy storage performance including high capacity of 136.8 mAh·g^−1 at 0.1·Ag^−1,high energy density of 191 Wh·kg^−1,large power density of 3,633.4 W·kg^−1,and satisfactory cycling stability of up to 5,000 cycles with a capacity retention of 90.9%.This work presents a new prospect of developing high-performance aqueous rechargeable zinc ion energy storage devices.

关键词： excellent performance zinc dendrite N-HPC zinc-ion Hybrid supercapacitors

Heterointerface engineering in hierarchical assembly of the Co/Co(OH)_(2)@carbon nanosheets composites for wideband microwave absorption

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Nano Research 2023年第2期16卷 2611-2621页

作者： Yuhan Wu Guodong Wang Xixi Yuan Gang Fang Peng Li Guangbin Ji College of materials Science and Technology Nanjing University of Aeronautics and AstronauticsNanjing 210016China Aerospace Research institute of Material&Processing Technology Beijing 100076China

Heterogeneous interface engineering strategy is an effective method to optimize electromagnetic functional ***,the mechanism of heterogeneous interfaces on microwave absorption is still *** this study,abundant heterointerfaces were customized in hierarchical structures via a collaborative strategy of lyophilization and hard *** impressive electromagnetic heterostructures and strong interfacial polarization were realized on the zero-dimensional(0D)hexagonal close-packed(hcp)-face-centered cubic(fcc)Co/two-dimensional(2D)Co(OH)_(2)nanosheets@three-dimensional(3D)porous carbon nanosheets(Co/Co(OH)_(2)@PCN).By controlling the carbonization temperature,the electromagnetic parameters were further adjusted to broaden the effective absorption bandwidth(EAB).Accordingly,the EAB of these absorbers were almost greater than 6 GHz(covering the entire Ku-band)in the thickness range of 2.0–2.2 mm except the sample *** far as to the S-0.8-700 achieved an EAB up to 7.1 GHz at 2.2 mm and the minimum reflection loss(RLmin)value was−25.8 ***,in the far-field condition,the radar cross section(RCS)of S-0.8-700 can be reduced to 19.6 dB·m^(2).We believe that this work will stimulate interest in interface engineering and provide a direction for achieving efficient absorbing materials.

关键词： microwave absorption wide bandwidth interface engineering hierarchical porous structure absorption mechanism

Efficient sequential harvesting of solar light by heterogeneous hollow shells with hierarchical pores

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National Science Review 2020年第11期7卷 1638-1646页

作者： Yanze Wei Jiawei Wan Nailiang Yang Yu Yang Yanwen Ma Songcan Wang Jiangyan Wang Ranbo Yu Lin Gu Lianhui Wang Lianzhou Wang Wei Huang Dan Wang State Key Laboratory of Biochemical Engineering Institute of Process Engineering Chinese Academy of Sciences Department of Physical Chemistry School of Metallurgical and Ecological EngineeringUniversity of Science and Technology Beijing University of Chinese Academy of Sciences Chinese Academy of Sciences School of materials Science and Engineering Nanjing University of Posts and Telecommunications School of Chemical Engineering and Australian institute for Bioengineering and Nanotechnology The University of Queensland Department of materials Science andEngineering Stanford University institute of Physics Chinese Academy of Sciences

In nature, sequential harvesting of light widely exists in the old life entity, i.e. cyanobacteria, to maximize the light absorption and enhance the photosynthesis efficiency. Inspired by nature, we propose a brand new concept of temporally-spatially sequential harvesting of light in one single particle, which has purpose-designed heterogeneous hollow multi-shelled structures (HoMSs) with porous shells composed of nanoparticle subunits. Structurally, Ho MSs consist of different band-gap materials outside-in, thus realizing the efficient harvesting of light with different wavelengths. Moreover, introducing oxygen vacancies into each nanoparticle subunit can also enhance the light absorption. With the benefit of sequential harvesting of light in Ho MSs, the quantum efficiency at wavelength of 400 nm is enhanced by six times compared with the corresponding nanoparticles. Impressively, using these aforementioned materials as photocatalysts,highly efficient photocatalytic water splitting is realized, which cannot be achieved by using the nanoparticle counterparts. This new concept of temporally-spatially sequential harvesting of solar light paves the way for solving the ever-growing energy demand.

关键词： light harvesting hollow structures multi-shelled solar energy conversion

Enhancing mechanisms of N-doped biomass carbon on the vanadium-based catalyst for furan degradation at low temperature

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Waste Disposal and Sustainable Energy 2024年第1期6卷 1-9页

作者： Ling Wang Minghui Tang Hongxian Li Jiamin Ding Juan Qiu Shengyong Lu State Key Laboratory of Clean Energy Utilization Zhejiang University38#Zheda RoadHangzhou310027China Taizhou institute of Zhejiang University Taizhou318012China Qingshanhu Energy Research Center Zhejiang University1699 Dayuan RoadQingshanhu Science and Technology CityHangzhou311300China

Polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans(PCDD/Fs)have attracted widespread concern due to their high toxicity,and their difficult manipulation in laboratories has made the research process ***,in our work,furan is selected as the model compound owing to the same structure of a central oxygenate *** catalytic oxidation is regarded as an effective and applicable method for the abatement of PCDD/Fs,the synthesis of low-temperature catalysts is still a challenging problem in practical *** this situation,we prepared a novel V_(2)O_(5)/TiO_(2)catalyst modified with N-doped hierarchical porous carbon(NHPC)via a wet impregnation *** V/T-1%NHPC catalyst could achieve expectant low-temperature performances with 50%furan conversion at 150℃and a complete conversion at 200℃,which decreased 23℃and 40℃compared to the V/T catalyst ***,the addition of NHPC presented lifting chemical stability during long-time *** addition of NHPC in V/T catalysts decreased the formation of crystalline V_(2)O_(5) and increased the percentages of V^(5+)and O_(lat),which improved the utilization of vanadium ions and the catalytic ***,the higher binding energy shift of O_(lat) implied more reaction possibility with other oxidise ***,this work proved the lifting catalytic activity by the interaction between catalysts and NHPC,and proposed the promoting effects of the N *** results showed that the content of the pyridinic N and graphitic N in NHPC changed after combining with V/T catalyst,which played crucial roles in the excellent catalytic ***,this work provides comprehensive research of the V/T-1%NHPC catalyst toward furan oxidation at low temperature and explain the effects of N-doped biomass carbon in catalytic activity clearly,which gave a new thought to design low-temperature catalysts in PCDD/Fs ***,the internal functional mech

关键词： Polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans Furan Low-temperature catalyst V_(2)O_(5)/TiO_(2)catalyst N-doped

High sensitivity and broad linearity range pressure sensor based on hierarchical in-situ filling porous structure

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npj Flexible Electronics 2022年第1期6卷 581-592页

作者： Jin Xu Huayang Li Yiming Yin Xin Li Jinwei Cao Hanfang Feng Wandi Bao Hao Tan Fanyuan Xiao Guang Zhu New materials institute Department of MechanicalMaterials and Manufacturing EngineeringUniversity of Nottingham Ningbo China315100 NingboChina CAS Key Laboratory of Magnetic materials and Devices Ningbo Institute of Materials Technology and EngineeringChinese Academy of Sciences315201 NingboChina School of Nanoscience and Technology University of Chinese Academy of Sciences100049 BeijingChina Ningbo Sezen Technology Co. Ltd315042 NingboChina College of Mechanical and Electrical Engineering Beijing University of Chemical Technology100029 BeijingChina

Flexible piezoresistive pressure sensor with high sensitivity over a broad linearity range have been attracting tremendous attention for its applications in health monitoring,artificial intelligence,and human-machine ***,we report a hierarchical insitu filling porous piezoresistive sensor(HPPS)by direct ink writing(DIW)printing and curing of carbon nanofibers(CNFs)/polydimethylsiloxane(PDMS)*** geometry significantly increases the contact area,distributes stress to multilayered lattice and internal porous structure,resulting in a broad sensing ***,unlike conventional hollow porous structure,the CNFs networks in-situ filling porous structure generates more contact sites and conductive pathways during compression,thereby achieving high sensitivity and linearity over entire sensing ***,the optimized HPPS achieves high sensitivity(4.7 kPa^(−1))and linearity(coefficient of determination,R^(2)=0.998)over a broad range(0.03-1000 kPa),together with remarkable response time and ***,the applications in diverse pressure scenarios and healthcare monitoring are demonstrated.

关键词： porous structure attracting

hierarchical porous yolk-shell Co-N-C nanocatalysts encaged in graphene nanopockets for high-performance Zn-air battery

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Nano Research 2023年第7期16卷 8893-8901页

作者： Yisi Liu Zongxu Li Shizhu Wang Jinnan Xuan Dongbin Xiong Lina Zhou Jianqing Zhou Jun Wang Yahui Yang Yue Du institute for Advanced materials Hubei Normal UniversityHuangshi 435002China Jiangsu Key Laboratory of materials and Technology for Energy Conversion College of Material Science and EngineeringNanjing University of Aeronautics and AstronauticsNanjing 210016China National&Local Joint Engineering Laboratory for New Petro-chemical materials and Fine Utilization of Resources College of Chemistry and Chemical EngineeringHunan Normal UniversityChangsha 410081China

The rational design and preparation of promising cathode electrocatalysts with excellent activity and strong stability for metal-air batteries is a huge *** this work,we innovate an approach of combining solvothermal with high-temperature pyrolysis utilizing zeolitic imidazolate framework(ZIF)-8 and ZIF-67 as the template to synthesize a novel hybrid material of hierarchical porous yolk-shell Co-N-C polyhedron nanocatalysts engaged in graphene nanopocket(yolk-shell Co-N-C@GNP).The obtained catalyst exhibits prominent bifunctional electrocatalytic performance for oxygen reduction reaction(ORR)and oxygen evolution reaction(OER)in the alkaline condition,in which the half-wave potential is 0.86 V for ORR,and the over-potential for OER is 0.42 V at 10 mA·cm^(-2).The rechargeable aqueous Zn-air battery fabricated with yolk-shell Co-N-C@GNP cathode deliveries an open circuit voltage(OCV)of 1.60 V,a peak power density of 236.2 mW·cm^(-2),and excellent cycling stability over 94 h at 5 mA·cm^(-2).The quasi-solid-state Zn-air battery(ZAB)using yolk-shell Co-N-C@GNP displays a high OCV of 1.40 V and a small voltage gap of 0.88 V in continuous cycling tests at 2 mA·cm^(-2).This work provides a valuable thought to focus attention on the design of high-efficient bifunctional catalysts with hierarchical porous yolk-shell framework and high-density metal active sites for metal-air battery technologies.

关键词： zeolitic imidazolate framework(ZIF)-67@ZIF-8 yolk-shell graphene nanopocket Bi-functional catalysts Zn-air battery

A biomimetic gradient porous cage with a micro-structure for enhancing mechanical properties and accelerating osseointegration in spinal fusion

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Bioactive materials 2023年第5期23卷 234-246页

作者： Cheng-Qi Jia Zhen Zhang Shi-Qi Cao Tian-Jiao Wang Hai-Chao Yu Wen-Xiang Wang Bo-Min Guo Xiong-Ying Qiu Yong-Gang You Fan-Qi Hu Jun Zhao Xue-Song Zhang Medical School of Chinese PLA Beijing100853China Department of Orthopedics Chinese PLA General HospitalBeijing100853China Department of Orthopedics of TCM Clinical Unit 6th Medical CenterChinese PLA General HospitalBeijing100853China Research institute of Aerospace Special materials and Processing Technology Beijing100074China CAS Key Laboratory of Nanosystem and hierarchical Fabrication CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing100190China Academy of Military Medical Sciences Academy of Military SciencesBeijing100080China University of Chinese Academy of Sciences Beijing100049China

Objectives:Spinal fusion is a widely employed treatment of patients with degenerative disc disease,in which a cage is used to replace the disc for spinal *** it often fails for insufficient mechanical strength and poor ***,we designed a polyether-ether-ketone(PEEK)/tantalum(Ta)composite cage with a biomimetic gradient porous micro-structure,simultaneously enhancing mechanical properties and accelerating osseointegration in spinal *** and methods:In the study,based on the mechanical performances of PEEK and osteogenic potential of Ta,and the three-dimensional(3D)structures of cuttlebone and vertebra,the cages were respectively 3D printed by pure PEEK,PEEK with 5 wt%Ta(PEEK/Ta-5),PEEK with 10 wt%Ta(PEEK/Ta-10)and PEEK with 15 wt%Ta(PEEK/Ta-15),then verifiedin vitroand in sheep cervical fusion model ***:Vertebral Gyroid structure PEEK/Ta-15 cage exhibited superior mechanical properties than Cuttlebone-like structure PEEK/Ta-15 cage,closer to the cervical ***,PEEK/Ta-15 cage with higher Ta microparticles in PEEK provided a biomimetic gradient porous micro-structure with higher surface energy,guiding cell biological behavior,promoting new bone penetration,and accelerating osseointegrationin vivo.Conclusion:In conclusion,the study designed a biomimetic gradient porous cage with a micro-structure for enhancing mechanical properties,accelerating osseointegration and forming an anatomical lock in the fusion segment through composites,mechanical efficiency,surface extension,and pores.

关键词： Biomimetic porous Composite Osseointegration Spinal fusion