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| 1 | A Review on Metal-Organic Framework-Derived Porous Carbon-Based Novel Microwave Absorption Materials显示文摘The development of microwave absorption materials(MAMs) is a considerable important topic because our living space is crowed with electromagnetic wave which threatens human’s health.And MAMs are also used in radar stealth for protecting the weapons from being detected.Many nanomaterials were studied as MAMs,but not all of them have the satisfactory performance.Recently,metal-organic frameworks(MOFs) have attracted tremendous attention owing to their tunable chemical structures,diverse properties,large specific surface area and uniform pore distribution.MOF can transform to porous carbon(PC) which is decorated with metal species at appropriate pyrolysis temperature.However,the loss mechanism of pure MOF-derived PC is often relatively simple.In order to further improve the MA performance,the MOFs coupled with other loss materials are a widely studied method.In this review,we summarize the theories of MA,the progress of different MOF-derived PC-based MAMs,tunable chemical structures incorporated with dielectric loss or magnetic loss materials.The different MA performance and mechanisms are discussed in detail.Finally,the shortcomings,challenges and perspectives of MOF-derived PC-based MAMs are also presented.We hope this review could provide a new insight to design and fabricate MOF-derived PC-based MAMs with better fundamental understanding and practical application. | Zhiwei Zhang Zhihao Cai Ziyuan Wang Yaling Peng Lun Xia Suping Ma Zhanzhao Yin Yi Huang | 2021 | Nano-Micro Letters2021，13，4： | 17 |
| 2 | Biomass-Derived Porous Carbon-Based Nanostructures for Microwave Absorption显示文摘Currently,electromagnetic(EM) pollution poses severe complication toward the operation of electronic devices and biological systems.To this end,it is pertinent to develop novel microwave absorbers through compositional and structural design.Porous carbon(PC)materials demonstrate great potential in EM wave absorption due to their ultralow density,large surface area,and excellent dielectric loss ability.However,the large-scale production of PC materials through low-cost and simple synthetic route is a challenge.Deriving PC materials through biomass sources is a sustainable,ubiquitous,and low-cost method,which comes with many desired features,such as hierarchical texture,periodic pattern,and some unique nanoarchitecture.Using the bio-inspired microstructure to manufacture PC materials in mild condition is desirable.In this review,we summarize the EM wave absorption application of biomass-derived PC materials from optimizing structureand designing composition.The corresponding synthetic mechanisms and development prospects are discussed as well.The perspective in this field is given at the end of the article. | Huanqin Zhao Yan Cheng Wei Liu Lieji Yang Baoshan Zhang Luyuan Paul Wang Guangbin Ji Zhichuan J.Xu | 2019 | Nano-Micro Letters2019，11，2： | 12 |
| 3 | Hierarchical Magnetic Network Constructed by CoFe Nanoparticles Suspended Within “Tubes on Rods” Matrix Toward Enhanced Microwave Absorption显示文摘Hierarchical magnetic-dielectric composites are promising functional materials with prospective applications in microwave absorption(MA)field.Herein,a three-dimension hierarchical“nanotubes on microrods,”core–shell magnetic metal–carbon composite is rationally constructed for the first time via a fast metal–organic frameworksbased ligand exchange strategy followed by a carbonization treatment with melamine.Abundant magnetic CoFe nanoparticles are embedded within one-dimensional graphitized carbon/carbon nanotubes supported on micro-scale Mo2N rod(Mo2N@CoFe@C/CNT),constructing a special multi-dimension hierarchical MA material.Ligand exchange reaction is found to determine the formation of hierarchical magnetic-dielectric composite,which is assembled by dielectric Mo2N as core and spatially dispersed CoFe nanoparticles within C/CNTs as shell.Mo2N@CoFe@C/CNT composites exhibit superior MA performance with maximum reflection loss of−53.5 dB at 2 mm thickness and show a broad effective absorption bandwidth of 5.0 GHz.The Mo2N@CoFe@C/CNT composites hold the following advantages:(1)hierarchical core–shell structure offers plentiful of heterojunction interfaces and triggers interfacial polarization,(2)unique electronic migration/hop paths in the graphitized C/CNTs and Mo2N rod facilitate conductive loss,(3)highly dispersed magnetic CoFe nanoparticles within“tubes on rods”matrix build multi-scale magnetic coupling network and reinforce magnetic response capability,confirmed by the off-axis electron holography. | Chunyang Xu Lei Wang Xiao Li Xiang Qian Zhengchen Wu Wenbin You Ke Pei Gang Qin Qingwen Zeng Ziqi Yang Chen Jin Renchao Che | 2021 | Nano-Micro Letters2021，13，3： | 10 |
| 4 | Shape anisotropic Fe3O4 nanotubes for efficient microwave absorption显示文摘Although Fe3O4 particles have exhibited excellent microwave absorbing capacity and widely used in practical application due to the synergistic effect of magnetic loss and dielectric loss,their applications are still limited for the required high mass fraction in absorbers.To overcome this problem,the development of Fe3O4 materials with low dimensional structures is necessary.In this study,the shape anisotropic Fe3O4 nanotubes(NTs)with low mass ratios were applied to realize efficient microwave absorption.The NTs with different aspect ratios were prepared through facile electrospinning followed by two-step thermal treatments and mechanical shearing.The cross-linked nanotubular structure enabled the absorbers to have much higher electrical conductivity,multiple scattering,polarization relaxation and better anti-reflection surface,while the shape anisotropic NTs maintained significant multiple resonances with stronger coercivity.These all were beneficial to microwave absorption with enhanced dielectric loss,magnetic loss and sterling impedance matching.Results showed that the absorber with 33.3 wt.%of short Fe3O4 NTs had minimum reflection loss of-58.36 dB at 17.32 GHz with a thickness of 1.27 mm,and had the maximum effective absorbing bandwidth(EAB)of 5.27 GHz when the thickness was 1.53 mm.The absorber with 14.3 wt.%of long Fe3O4 NTs presented the widest EAB in certain radar band with attenuated 80.75%X band and 85%Ku band energy bellow-10 dB at the thickness of 2.65 and 1.53 mm,respectively.This study provided an approach for the development of shape anisotropic magnetic absorbing materials,and broadened their practical applications as magnetic absorbers. | Jialiang Pan Honggui Guo Min Wang Hui Yang Haowen Hu Peng Liu Hongwei Zhu | 2020 | Nano Research2020，13，3： | 8 |
| 5 | Ni Flower/MXene-Melamine Foam Derived 3D Magnetic/Conductive Networks for Ultra-Efficient Microwave Absorption and Infrared Stealth显示文摘The development of multifunctional and efficient electromagnetic wave absorbing materials is a challenging research hotspot.Here,the magnetized Ni flower/MXene hybrids are successfully assembled on the surface of melamine foam(MF)through electrostatic self-assembly and dip-coating adsorption process,realizing the integration of microwave absorption,infrared stealth,and flame retardant.Remarkably,the Ni/MXene-MF achieves a minimum reflection loss(RLmin)of−62.7 dB with a corresponding effective absorption bandwidth(EAB)of 6.24 GHz at 2 mm and an EAB of 6.88 GHz at 1.8 mm.Strong electromagnetic wave absorption is attributed to the three-dimensional magnetic/conductive networks,which provided excellent impedance matching,dielectric loss,magnetic loss,interface polarization,and multiple attenuations.In addition,the Ni/MXene-MF endows low density,excellent heat insulation,infrared stealth,and flame-retardant functions.This work provided a new development strategy for the design of multifunctional and efficient electromagnetic wave absorbing materials. | Haoran Cheng Yamin Pan Xin Wang Chuntai Liu Changyu Shen Dirk W.Schubert Zhanhu Guo Xianhu Liu | 2022 | Nano-Micro Letters2022，14，4： | 7 |
| 6 | Construction of multiple interfaces and dielectric/magnetic heterostructures in electromagnetic wave absorbers with enhanced absorption performance:A review显示文摘The construction of structures with multiple interfaces and dielectric/magnetic heterostructures enables the design of materials with unique physical and chemical properties,which has aroused intensive interest in scientific and technological fields.Especially,for electromagnetic(EM)wave absorption,enhanced interface polarization and improved impedence match with high Snoek's limitation could be achieved by multiple interfaces and dielectric/magnetic heterostructures,respectively,which are benificial to high-efficiency electromagnetic wave absorption(EWA).However,by far,the principles in the design or construction of structures with multiple interfaces and dielectric/magnetic heterostructures,and the relationships between those structures or heterostructures and their EWA performance have not been fully summarized and reviewed.This article aims to provide a timely review on the research progresses of high-efficency EM wave absorbers with multiple interfaces and dielectric/magnetic heterostructures,focusing on various promising EWA materials.Particularly,EM attenuation mechanisms in those structures with multiple interfaces and dielectric/magnetic heterostructures are discussed and generalized.Furthermore,the changllenges and future developments of EM wave absorbers based on those structures are proposed. | Junye Cheng Huibin Zhang Yingfei Xiong Lingfeng Gao Bo Wen Hassan Raza Hao Wang Guangping Zheng Deqing Zhang Han Zhang | 2021 | Journal of Materiomics2021，7，6： | 7 |
| 7 | Spider web-like carbonized bacterial cellulose/MoSe_(2) nanocomposite with enhanced microwave attenuation performance and tunable absorption bands显示文摘It is essential to manufacture microwave absorbers with strong absorption as well as tunable absorption bands at a low filler content.However,it remains challenging for pure biomass material to reach this goal without loading other components.MoSe_(2),as a transition metal chalcogenide with semiconductor properties,has emerged as a potential microwave absorber filler.Herein,bacterial cellulose(BC)-derived carbon nanofibers/MoSe_(2) nanocomposite was fabricated and phosphoric acid was used to dope phosphorus in BC,in which MoSe_(2) microspheres were dropped on the BC network like a dew-covered spider web.This unique network structure enhances conductive loss and multiple reflections of the incident wave.The collocation of BC and MoSe_(2) is helpful to impedance match and introduces interfacial/dipolar polarization loss;moreover,the P-doping of BC helps to tune the absorption bands.Overall,the optimal reflection loss of undoped one reaches−53.33 dB with only 20 wt.%filler content,whose main absorption peaks focus on X-band.Interestingly,after the P-doping of BC,the main absorption peaks move to Ku-band and the optimal reflection loss gets stronger(−66.84 dB)with the same filler loading.Strong absorption and tunable absorption bands can be realized,and thus wide frequency range is covered.This work is expected to enlighten future exploration of biomass carbon materials on high-performance microwave absorption materials. | Zhengjian Xu Man He Yuming Zhou Shuangxi Nie Yongjuan Wang Yao Huo Yifan Kang Ruili Wang Ran Xu Hao Peng Xi Chen | 2021 | Nano Research2021，14，3： | 6 |
| 8 | 沉积温度对纳米碳管-铁粒子复合物的制备及吸波性能影响显示文摘采用金属有机化学气相沉积(MOCVD)工艺,以Fe(CO)5为前驱体,在CNTs表面原位生长纳米级Fe粒子,通过改变沉积温度,调控复合粉体的形貌结构和吸波性能。用X射线衍射仪、场发射电子显微镜、透射电子显微镜和矢量网络分析仪对粉末的结构及电磁性能进行表征并对其吸波性能进行研究。结果表明,随着沉积温度升高(210~240℃),沉积到CNTs表面的Fe粒子逐渐增加;沉积温度过高时(270℃)会造成CNTS表面Fe粒子团聚。通过调节沉积温度,可以调控CNTs-Fe复合粉体的电磁性能。以吸波性能为考察指标,最终确定最佳的沉积温度为240℃。以沉积温度为240℃时所获样品的电磁参数,模拟计算出涂层厚度为2.9 mm时,反射率达到最小值为-28.3 dB,小于-10 dB的吸波带宽最大为6.1 GHz(10.2~16.3 GHz)。 | 刘渊 赖杰 师金锋 | 2020 | 新型炭材料2020，35，4： | 5 |
| 9 | 生物质衍生碳基复合吸波材料的研究进展显示文摘为了满足军事国防领域对隐身技术的需求,解决5G时代广泛的电磁污染问题,各类型的碳基吸波材料异军突起。生物质衍生碳基材料相比传统碳基吸波材料,不仅提高了吸波性能,还具有轻质、低成本和可持续的优势。简要叙述了生物质碳材料的合成方法,系统地介绍了可食用和非食用2种生物质衍生材料在碳基复合吸波材料制备中的应用,综述了近几年来生物质衍生碳基复合材料在吸波领域的最新研究进展。重点分析了不同生物质衍生碳基复合材料的微观结构、微波吸收性能的差异,并概述了不同生物质衍生碳基复合材料吸波机理,最后讨论了具有高效微波吸收性能的生物质碳基复合吸波材料所面临的挑战,展望了其未来发展的方向。为从事生物质衍生吸波材料的科研工作者提供了较为全面的理论和应用知识背景,并有望进一步推进生物质衍生碳基复合吸波材料的发展及应用。 | 武志红 姚程 蒙真真 王耀 郭鑫玉 周华凤 王宇斌 | 2022 | 硅酸盐学报2022，50，7： | 5 |
| 10 | 磁功能化多孔生物质炭复合材料的制备及吸波性能显示文摘采用高温炭化和水热法制备了兼具介电损耗和磁损耗特性的磁功能化生物质炭(Fe3O4/多孔生物质炭)吸波材料。在200℃水热条件下,随着FeCl3浓度的增加,PLSC表面生成的聚集态Fe3O4纳米晶粒有所增加,颗粒大小规整,平均粒径约为200nm。通过矢量网络分析仪探讨了磁材料含量、复合材料的形貌结构对吸波性能的影响,并分析了多重损耗吸波机理。结果表明,在2~18GHz范围内,当FeCl3浓度为4mmol时制备的磁功能化生物质炭复合吸波材料具有最佳的吸波性能,在厚度为2mm时,其在11.42GHz处的最大反射损耗值可达-42.2dB,有效频宽达3.14GHz(反射损耗小于-10dB)。 | 杨期鑫 俞璐军 董余兵 傅雅琴 朱曜峰 | 2019 | 新型炭材料2019，34，5： | 5 |
| 11 | Self-transforming ultrathin α-Co(OH)2 nanosheet arrays from metal-organic framework modified graphene oxide with sandwichlike structure for efficient electrocatalytic oxygen evolution显示文摘Developing efficient and low-cost electrocatalysts for oxygen evolution reaction(OER)with high electrochemical activity and durability for diverse renewable and sustainable energy technologies remains challenging.Herein,an ultrasonic-assisted and coordination modulation strategy is developed to construct sandwich-like metal-organic framework(MOF)derived hydroxide nanosheet(NS)arrays/graphene oxide(GO)composite via one-step self-transformation route.Inducing from unsteady state,the dodecahedral ZIF-67 with Co^2+in tetrahedral coordination auto-converts into defect-rich ultrathin layered hydroxides with the interlayered ion NO3-.The self-transforming a-Co(OH)2/GO nanosheet arrays from ZIF-67(Co(OH)2-GNS)change the coordination mode of Co^2+and bring about the exposure of more metal active sites,thereby enhancing the spatial utilization ratio within the framework.As monometal-based electrocatalyst,the optimized Co(OH)2-GNS exhibits remarkable OER catalytic performance evidenced by a low overpotential of 259 mV to achieve a current density of 10 mA·cm-2 in alkaline medium,even exceeding commercial RuO2.During the oxygen evolution process,electron migration can be accelerated by the interfacial/in-plane charge polarization and local electric field,corroborated by the off-axis electron holography.Density functional theory(DFT)calculations further studied the collaboration between ultrathin Co(OH)2 NS and GO,which leads to lower energy barriers of intermediate products and greatly promotes electrocatalytic property. | Mengqiu Huang Weiwei Liu Lei Wang Jiwei Liu Guanyu Chen Wenbin You Jie Zhang Lijun Yuan Xuefeng Zhang Renchao Che | 2020 | Nano Research2020，13，3： | 4 |
| 12 | Chemical synthesis and coercivity enhancement of Nd2Fe14B nanostructures mediated by non-magnetic layer显示文摘High-performance Nd2Fei4B magnets have been widely required in various fields recently due to the lightweight and miniaturization of devices.In this work,we synthesize Nd2Fei4B nanostructures with tunable magnetic properties through surfactant-assisted high energy ball milling(SAHEBM)process,achieving prominently enhanced coercivity by forming non-magnetic layers as grain boundary phase.When the reduction annealing process was carried out as pellet with Ca,the coercivity increased from 0.8 kOe to over 3 kOe as Nd2Fei4B powder,which is proved to be the contribution of the chemical diffusion of Nd elements and the formation of Nd-rich layer as magnetic insulating medium.In addition,two-dimensional graphene oxide(GO)was employed to build extra grain boundary,by which the coercivity of the core@dual-shell structure can achieve up to 8 kOe,tenfold of the original sample.The intrinsic mechanism indicated that the Nd-diffusion induced Nd-rich phase along with the reduced GO in the system could form non-magnetic layer as grain boundary and magnetically isolate the adjacent grains,significantly enhancing the exchange coupling effect.This work markedly opens up an effective approach for the chemical preparation of high-performance Nd2Fe14B nanostructured magnets,especially after post treatment,and gives an insight on the interactions at nanoscale. | Kai Zhu Junjie Xu Xiaobai Wang Wei Li Kesong Tian Yanglong Hou | 2020 | Nano Research2020，13，4： | 3 |
| 13 | Controllable preparation and microwave absorption properties of shape anisotropic Fe_(3)O_(4) nanobelts显示文摘To substantially prevent electromagnetic threatens,microwave absorbing materials(MAMs)are required to eliminate surplus electromagnetic waves.As a typical MAM,Fe_(3)O_(4) particles with complex permittivity and permeability have been widely applied due to the coexistence of magnetic loss and dielectric loss.However,the necessary high mass fraction significantly limited its applications,thus Fe_(3)O_(4) nanostructures have been extensively investigated to overcome this problem.In this work,uniform Fe_(3)O_(4) nanobelts were prepared by electrospinning and two-step thermal treatment.By controlling the composition and viscosity of the electrospinning precursor solution,Fe_(3)O_(4) nanobelts with tunable lateral sizes(200 nme1 mm)were obtained.The samples with low content(only 16.7 wt%)Fe_(3)O_(4) exhibited wide maximum effective absorbing bandwidths(EAB)over 3 GHz,and Fe_(3)O_(4) nanobelts with smaller lateral sizes showed a maximum EAB of 4.93 GHz.Meanwhile,Fe_(3)O_(4) nanobelts with smaller lateral sizes presented superior reflection loss properties,the lowest reflection loss reached-53.93 dB at 10.10 GHz,while the maximum EAB was up to 2.98 GHz.The excellent microwave reflection loss of Fe_(3)O_(4) nanobelts was contributed to the enhanced synergistic effect of magnetic loss,dielectric loss,and impedance matching,originated from the hierarchically cross-linked networks and shape anisotropies.This study could broaden the practical applications of magnetic absorbers,and provided an approach for the development of shape anisotropic magnetic materials. | Jialiang Pan Rujing Zhang Jun Ling Min Wang Zechen Li Zhen Zhen Limin He Hongwei Zhu | 2021 | Journal of Materiomics2021，7，5： | 3 |
| 14 | Vacancy-defect-dipole amplifies the thermoacoustic conversion efficiency of carbon nanoprobes显示文摘The immense potential of carbon nanoprobes(CNPs)for using as contrast agents has propelled much recent research and development in the field of thermoacoustic(TA)molecular imaging,while the proper engineering and design of such materials with required high TA conversion efficiency is still a highly challenging task.In this work,we proposed a controllable strategy to amplify the TA conversion efficiency of the CNPs by constructing vacancy defect(VD)dipoles,and systematically demonstrated the amplification mechanism through theoretical and experimental investigations.First-principles calculation results indicate that,when a carbon atom is removed from the CNPs by chemical approach,owing to local electron density redistribution,the VDs are formed at the positions of the original carbon atoms and act as the structural origin of permanent electric dipoles with the dipole moment several orders higher than that of non-defect sites.Under pulsed microwave irradiation,the VD dipoles are polarized repeatedly and significantly contribute to the conversion efficiency from absorbed electromagnetic waves to ultrasound through enhanced dielectric relaxation losses.We experimentally synthesized graphene samples with different VD densities and VD types to demonstrate the efficiency of the proposed strategy,and results coincide well with the theoretical proposition.This work offers feasible guidance to the systematic development and rational design of new high-conversion-efficiency TA CNPs via VD engineering. | Wei Fang Yujiao Shi Da Xing | 2020 | Nano Research2020，13，9： | 2 |
| 15 | 利用煤矸石制备负载Fe_(3)O_(4)的陶瓷复合材料及微波吸收性能研究显示文摘本研究以固废煤矸石为主要原料,通过对其进行破碎、球磨、酸洗处理、造粒成球和煅烧得到煤矸石载体,经液相负载与原位碳热还原制得Fe_(3)O_(4)负载的陶瓷复合微波吸收材料,并且研究了Fe_(3)O_(4)负载量对复合材料结构及电磁性能的影响规律。结果表明,当焙烧温度为600℃、前驱体溶液浓度为1.25−1.5 mol/L时,复合材料的微波吸收性能最佳,涂层厚度为2.0 mm时的最低反射损耗值和有效吸收带宽分别可达−20.1 dB和4.7 GHz,主要归因于复合材料良好的阻抗匹配与衰减特性。本实验制备流程简单,为固废煤矸石的回收利用提供了新思路,同时也可以降低微波吸收材料的生产成本。 | 田君儒 王晓敏 梁丽萍 力国民 | 2021 | 燃料化学学报2021，49，9： | 2 |
| 16 | Pomegranate micro/nano hierarchical plasma structure for superior microwave absorption显示文摘Inspired by the pomegranate natural artful structure,pomegranate micro/nano hierarchical plasma configuration of Fe/Fe3C@graphitized carbon(FFC/pCL)was constructed based on the green sol-gel method and in-situ chemical vapor deposition(CVD)synthesis protocol.Pomegranate-like FFC/pCL successfully overcame the agglomeration phenomenon of magnetic nanoparticles with each seed of the pomegranate consisting of Fe/Fe_(3)C as cores and graphitized carbon layers as shells.The high-density arrangement of magnetic nanoparticles and the design of pomegranate-like heterostructures lead to enhanced plasmon resonance.Thus,the pomegranate-like FFC/pCL achieved a great electromagnetic wave(EMW)absorbing performance of 6.12 GHz wide band absorption at a low mass adding of only 16.7 wt.%.Such excellent EMW performance can be attributed to its unique pomegranate hierarchical plasma configuration with separated nanoscale iron cores,surface porous texture,and good carbon conductive network.This investigation provides a new paradigm for the development of magnetic/carbon based EMW absorbing materials by taking advantage of pomegranate hierarchical plasma configuration. | Chunyan Ding Tao Wu Xinsen Hu Chengshuai Shao Zhipeng Xu Hui Fu Songsong Wu Guangwu Wen Xiaoxiao Huang | 2022 | Nano Research2022，15，10： | 1 |
| 17 | Ion-exchange polymers modified bacterial cellulose electrodes for the selective removal of nitrite ions from tail water of dyeing wastewater显示文摘Ion-exchange polymer and modified carbonization bacterial cellulose(CBC)electrodes were fabricated using varying amounts of cation-exchange polymers(glutaric acid(GA)and sulfosuccinic acid(SSA))and assembled within an asymmetric capacitive deionization unit(p-CDI).The performance of selective NO2-electro-adsorption was studied.The AC/CBCSSA group showed a better salt adsorption capacity(14.56 mg/g)and nitrite removal efficiency(71.01%)than the AC/CBC-GA(10.72 mg/g,47.83%)and AC/AC(4.81 mg/g,12.74%)groups.It was confirmed that the CBC-SSA/GA electrodes enhanced nitrite selectivity and increased the adsorption capacity,and the total amounts of adsorbed anions increased when the applied voltage was increased from 0.8 to 1.2 V,while the molar fraction of nitrate decreased.The competitive and preferential adsorption of anions was further investigated using different binary solutions of anions and occurred in the following sequence:NO2->SO42->NO3->F-≈Cl-.Furthermore,the p-CDI units were applied to remove nitrite in real wastewater samples,and the results showed that they had excellent reusability and application for use in dyeing wastewater treatment. | Danping Li Xun-an Ning Yiqian Yuan Yanxiang Hong Jianpei Zhang | 2020 | Journal of Environmental Sciences2020，32，5： | 1 |
| 18 | 高电导率银纳米线@聚吡咯@CoNi气凝胶的制备及其电催化析氧性能显示文摘针对传统贵金属析氧反应(OER)电催化剂的电导率较低、催化活性较差、成本高等问题,开发高效耐久、低成本且具有高暴露活性表面和优良导电性的电催化剂已迫在眉睫。通过冷冻干燥法合成银纳米线@聚吡咯(AgNWs@PPy)气凝胶,然后使用溶剂热法在AgNWs@PPy气凝胶骨架表面生长纳米CoNi合金,获得了OER电催化性能良好的AgNWs@PPy@CoNi气凝胶。结果表明,随着Co^(2+)、Ni^(2+)浓度的增加,AgNWs@PPy@CoNi气凝胶的催化性能先增强后减弱,当Co^(2+)、Ni^(2+)浓度为0.0175 mol/L制备的AgNWs@PPy@CoNi气凝胶在电流密度10 mA·cm^(−2)时,过电位为346 mV,Tafel斜率为86.25 mV·dec^(−1),在恒定电压下经过10 h的稳定性测试,电流保持率达93.9%,具有良好的稳定性。三维独立型AgNWs@PPy气凝胶提供优良的导电性,CoNi合金提供丰富的活性位点,二者的共同作用表现出优异的OER催化性能,将有望替代贵金属催化剂而成为新型的OER催化材料。 | 魏剑 陈甜甜 张昊 张雪萍 李嘉欣 蒋一昌 | 2022 | 复合材料学报2022，39，3： | 1 |
| 19 | Ferrite-based composites and morphology-controlled absorbers显示文摘The exploration of lightweight and efficient electromagnetic wave(EMW)absorption materials is a crucial focus topic because the human body and precision instruments are exposed to the increasingly serious electromagnetic pollution.Ferrite,as the first type of EMW absorption material,is still the indelible superstar in the EMW absorption field due to its unique double loss mechanism,controllable morphology and high permeability.This review briefly introduces the EMW absorption and attenuation mechanism of ferrite-based composite absorbers,including dielectric loss dominated by charge transfer and polarization relaxation,and magnetic loss consisted of eddy current and resonance.Moreover,we comb the advances in synthesis of ferrite materials.In particular,this paper summarizes the advantages and defects of pure ferrite as EMW absorption material.And the approach to tackling the imbalance of impedance matching and highdensity in ferrite is also reviewed,including ion substitution,design of micro-morphology and doping with dielectric loss materials. | Yu Mu Zhen-Hui Ma Hong-Sheng Liang Li-Min Zhang Hong-Jing Wu | 2022 | Rare Metals2022，41，9： | 1 |
| 20 | 无催化剂碳热还原法制备SiC@SiO2纳米电缆(英文)显示文摘SiC@SiO2纳米电缆作为一种新型的功能性纳米复合材料,以其优异的性能和广泛的应用前景受到了广泛关注。因此,开发一种有效、经济、方便,SiC@SiO2纳米电缆的制备方法具有重要意义。本研究采用无催化剂的碳热还原法在1500℃的Ar气氛下,通过加热硅粉和硅溶胶混合物从而快速高效地制备了SiC@SiO2纳米电缆。该核壳的纳米电缆是由单晶β-SiC核心和无定形SiO2壳组成,其长度达几百微米,直径为60~80 nm,而且通过调节保温时间可以调控核壳的尺寸。结合实验数据并依据气-固(VS)机理解释了SiC@SiO2纳米电缆的形成过程,同时也进一步丰富了该生长机制,为其工业化生产提供了参考。 | 田兆波 陈克新 孙思源 张杰 崔巍 刘光华 | 2019 | 无机材料学报2019，34，11： | 1 |
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