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Science China(Technological Sciences) 2022年第4期65卷 837-848页

作者： YANG XiaoFen FAN BaoXin WANG XinXin WU LiShan YAO QiBin tong guoxiu WU WenHua CHEN DaBo College of Chemistry and Life Sciences Key Laboratory of the Ministry of Education for Advanced Catalysis MaterialsZhejiang Normal UniversityJinhua 321004China NEW MORE Graphene Application Technology Co. Ltd.Jinhua 321004China

To solve the severe electromagnetic(EM)radiation from the widespread application of electronic equipment,we developed a simple template-guided oxypolymerization strategy to synthesize polypyrrole(PPy)planar helixes as an efficient EM wave(EMW)absorber,and systematically investigated the morphology-dependent chirality,conductivity,and microwave absorption *** HCl concentration[HCl]varied from 0 to 2.0 M,the morphology evolved from planar helix to 3D cross-linking network structures,the conductivity increased from 0.0019 to 0.0302 S/cm,and the EM parameters peaked at[HCl]=0.5 *** to other absorbers,the PPy planar helix formed at[HCl]=0 M possessed wider absorption band(5.84 GHz),smaller matching thickness(1.6 mm),lower loading(25 wt.%),and intenser absorption(-48.17 dB).The reason lies in the strong attenuation capability,multiple resonances,multiple scattering,and good impedance matching generated by chiral PPy planar helixes with a distinctive helical configuration,doped heteroatoms(O,S),and a local conductive *** results suggest that PPy planar helixes offer great promise for fields such as chiral sensors,electronics,optics,chiral catalysis,and EMW absorption and shielding due to their distinctive morphology,tunable conductivity,and outstanding EMW absorption properties(EMWAPs).

关键词： PPy planar helix CTAB template assisted oxypolymerization strategy electromagnetic wave absorption performance absorption mechanism

Controlled fabrication and electrical-magnetic properties of Poly(OT-co-AN)/Ba_(0.8)La_(0.2)Al_2Fe_(10)O_(19) composites

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Science China(Technological Sciences) 2012年第1期55卷 6-15页

作者： CHEN KeYu XU QingQing LI LiangChao tong guoxiu QIAN HaiSheng XIAO QiuShi XU Feng Department of Chemistry Institute of Physical Chemistry Zhejiang Normal University Jinhua 321004 China

Poly（OT-co-AN）/Ba0.8La0.2Al2Fe10O19 （Poly（OT-co-AN）/BLAF） composites were fabricated by in situ polymerization method. It was investigated that of mass rate of momomer （mor/mAN）, polymeration temperature and time, and feeding ratio of BLAF effect on the structures, morphology, conductivity, magnetic property of composites by the orthogonal optimum design. The results indicated that poly （OT-co-AN） copolymer had a better coating on BLAF particles, and there were some interactions between components in the composites. The magnetic properties of the composites were related to content of the magnetic BLAF particles in it. The feeding ratio of BLAF had a significant influence on constitute and conductivity of the composites, followed by the temperature. The reflection loss and the effective bandwidth of composites for electromagnetic wave were at- tributed to the synergistic effect between poly（OT-co-AN） and BLAF. The poly（OT-co-AN）/BLAF composites with mass ratio of BLAF to mix monomer （moT^mAN =1：1） equal to 5/1 at 10 h in 25~C had a maximum synergistic effect between its compo- nents, showed a maximum reflection loss of -26.94 dB at 14.10 GHz and an available bandwidth of 8.54 GHz. It was sug- gested that the composites can be used as a advancing absorption and shielding materials for electromagnetic wave due to their favorable microwave absorption properties.

关键词： poly(OT-co-AN) copolymer Ba-ferrite conductivity magnetic property reflection loss

High-performance wearable bimetallic nanowire-assisted composite foams for efficient electromagnetic interference shielding,infrared stealth,and piezoresistive sensing

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Nano Research 2024年第7期17卷 6757-6765页

作者： Tianyi Hang Lijie Zhou Chenhui Xu Yiming Chen Jiahui Shen Jiajia Zheng Pingan Yang Xiping Li Heng Luo guoxiu tong Key Laboratory of Urban Rail Transit Intelligent Operation and Maintenance Technology and Equipment of Zhejiang Province College of EngineeringZhejiang Normal UniversityJinhua 321004China School of Automation Chongqing University of Posts and TelecommunicationsChongqing 400065China State Key Laboratory of Powder Metallurgy Central South UniversityChangsha 410083China Key Laboratory of the Ministry of Education for Advanced Catalysis Materials College of Chemistry and Materials ScienceZhejiang Normal UniversityJinhua 321004China

With the accelerated development of modern detection and communication technology,the multifunctional wearable materials with excellent electromagnetic interference(EMI)shielding,infrared stealth,and human monitoring for improving military combat capability have received extensive *** this work,the lightweight melamine foam(MF)@silver nanowires(AgNWs)-iron nanowires(FeNWs)(AgFe-MF)was fabricated by a vacuum-assisted dip-coating *** to the porous structure and synergistic electrical and magnetic losses,this lightweight(0.115 g/cm^(3))composite foam with an ultra-low filler content(0.62 vol.%)exhibited an ideal EMI shielding efficiency of 38.4 *** the other hand,the AgFe-MF realized a powerful multifunctional *** surface saturation temperature of the AgFe-MF reached 94.2℃under a low applied voltage of 1.8 V and remained extremely fast heating and cooling response and terrific working stability,resulting in excellent infrared stealth and camouflage ***,taking virtues of the elastic porous conductive architecture,the AgFe-MF was utilized as a piezoresistive sensor exhibiting board compressive interval of 0–1.62 kPa(50%strain)with a good sensitivity of 0.57 kPa^(−1).This work will provide new ideas and insights for developing multifunctional wearable devices in the fields of EMI shielding,thermal management,and piezoresistive sensing.

关键词： metal nanowires porous foams electromagnetic interference shielding infrared stealth wearable sensors

Tailoring impedance match and enhancing microwave absorption of Fe3O4/Bi24Fe2O39/Bi hollow porous microrods by controlling their composition

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Progress in Natural Science:Materials International 2018年第5期28卷 575-583页

作者： Lin Liu Na He Jiacheng Sun Panbing Hu Rujia He Jinxiu Cheng Weifu Tian guoxiu tong College of Chemistry and Life Sciences Zhejiang Key Laboratory for Reactive Chemistry on Solid Surface Zhejiang Normal University

A self-assembly/precipitate conversion/decomposition process was developed for the controllable synthesis of Fe3O4/Bi24Fe2O39/Bi hollow porous microrods（HPMRs）.The results demonstrated that the crystal size,component,and performances of HPMRs could be effectively modulated via changing Fe2+/Bi3+molar ratio（γ）.Fe3O4/Bi24Fe2O39/Bi HPMRs exhibited ferromagnetic behavior at room *** Bi and Bi24Fe2O39contents increased withγ,the saturation magnetization Msand attenuation constantly decreased,whereas coercivity Hcand impedance matching ratio *** Fe3O4with small quantities of Bi and Bi24Fe2O39into HPMRs can significantly enhance microwave ***3O4/Bi24Fe2O39/Bi HPMRs formed atγ=1:0.25 exhibited the optimum microwave absorption *** minimum RLwas-47.3 dB at8.72 GHz,corresponding to 2.4 mm sample *** absorption band with the reflection loss below-20 dB was up to 14.0 GHz for the absorber with a thickness of 1.4-8.0 *** results demonstrate that the introduction of electromagnetic transparent materials(Bi24Fe2O39or Bi)can improve the microwave absorption performances of Fe3O4composites owing to enhanced impedance matching rather than attenuation constant.

关键词： Fe3O4/Bi24Fe2O39/Bi composites Synthesis Hollow porous microrods Magnetic property Composition-dependent microwave absorption

Effect of liquid-solid ratio on the morphology,structure,conductivity,and electromagnetic characteristics of iron particles

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Science China(Technological Sciences) 2011年第2期54卷 484-489页

作者： tong guoxiu HUA Qiao WU WenHua QIN MingYue LI LiangChao GONG PeiJun College of Chemistry and Life Sciences Zhejiang Normal University Jinhua 321004 China

Using a ball-milling technique,polymorphous iron particles were prepared by changing only the liquid-solid ratioλ.Effects of λon their morphology,structure,conductivity,and electromagnetic properties were *** results show that an increase ofλfrom 0 to 0.25 causes a nonlinear decrease of the conductivity in the ranges of 88.50-2.25 S cm-1 and a regular variation of the electromagnetic parameters,corresponding to the as-obtained iron *** is ascribed to a combination of the increased shape anisotropy and the decreased fresh surface with active atoms deriving from the weakened welding-on action and the enhanced micro-malleation action in the ball-milling ***,the iron flakes formed at wet-milling with λ=0.08-0.25 have lower conductivity,higher permittivity and permeability,and more excellent absorption property compared with the irregular iron particles obtained at dry-milling withλ=*** is a consequence of the synergistic effect of dielectric relaxation loss,exchange energy and conductance loss originating from the flake-shape *** indicates that the morphology,structure,conductivity,and electromagnetic properties of the products can be effectively controlled by changingλ.

关键词： iron flake liquid-solid ratio conductivity microwave electromagnetic property

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Controllable hydrothermal synthesis and static magnetic properties of polycrystalline Fe3O4/C core-shell nanorings

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Controllable hydrothermal synthesis and static magnetic prop...

离子掺杂氧化锌光催化纳米功能材料的制备及其应用

中国化学会第九届全国无机化学学术会议

作者： tong Wu Yun Liu guoxiu tong College of Chemistry and Life Sciences Zhejiang Normal University College of Chemistry and Molecular Sciences Wuhan University

Elliptical, polycrystalline Fe3O4/C core-shell nanorings with tunable size and C content have been successfully synthesized via the PVP-protecting hydrothermal etching method. The precursors of elliptical iron glycolate nanosheets(IGNS) were first made by a facile polyol-mediated solvethermal approach and subsequently converted into Fe3O4/C core-shell nanorings via PVP-protecting etching in the presence of glucose. Glucose provided the C sources and reducer for the growth of Fe3O4/C core-shell nanorings. The wall thickness and long axis length varied at the ranges of 10 20 nm and 1.6 2.3, respectively. The long axis length and C content of nanorings can be tuned at the ranges of 40 200 nm and 0 – 39.64 wt%, respectively. The former can be achieved via controlling precursor size and the latter via modulating the glucose/precursor molar ratio. The study of magnetic properties revealed that Fe3O4/C core-shell nanorings exhibited composition dependent static magnetic properties. The saturation magnetization(Ms) and coercivity(Hc) gradually decreased with the increasing C content. We believe that the as-prepared Fe3O4/C core-shell nanorings have potentially practical applications in catalysis, information storage media, electrodematerials, biosensor, bioseparation, medical diagnostics, and magnetic resonance imaging(MRI) contrast agents.

关键词： nanoring magnetite/carbon hydrothermal method C content-dependent magnetic property

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化学进展 2014年第10期26卷 1619-1632页

作者：殷巧巧乔儒童国秀浙江师范大学化学与生命科学学院金华321004

氧化锌是一种氧化还原电位高、激子结合能大（~60 meV）、物理和化学稳定性较好、廉价且无毒的半导体光催化剂。本文综述了掺杂氧化锌光催化剂的掺杂离子类型、制备方法、光催化效果及其作用机理。掺杂氧化锌的离子类型主要包括非金属... 详细信息

氧化锌是一种氧化还原电位高、激子结合能大（~60 meV）、物理和化学稳定性较好、廉价且无毒的半导体光催化剂。本文综述了掺杂氧化锌光催化剂的掺杂离子类型、制备方法、光催化效果及其作用机理。掺杂氧化锌的离子类型主要包括非金属离子单掺杂、金属离子（包括过渡金属离子和稀土金属离子）单掺杂和双离子共掺杂。离子掺杂后可在氧化锌晶格中引入更多的氧空穴或缺陷,为光致氧化反应提供更多的活性位点;或者引入杂质能级,扩大光吸收范围,增强可见光吸收能力。同时,掺杂的离子也可作为电子捕获中心,阻止光生电子-空穴对的复合,从而提高氧化锌光催化剂的性能。此外,文中还对掺杂氧化锌光催化剂在有机污染物降解、抗菌和光催化制氢等方面的应用进行了系统概述,并对其发展趋势作了展望。

关键词：氧化锌离子掺杂光催化催化机理光降解抗菌性制氢

Preparation and electrochemical properties of urchin-like α-Fe_2O_3 nanomaterials

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Science China(Technological Sciences) 2010年第7期53卷 1897-1903页

作者： tong guoxiu1,2, GUAN JianGuo2, WU WenHua1, LI LiangChao1, GUAN Yao2 & HUA Qiao1 1 College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, China 2 State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China College of Chemistry and Life Sciences Zhejiang Normal University Jinhua China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan China

Based on a facile glucose-guided hydrolyzing-heat-treating approach, urchin-like α-Fe2O3 nanomaterials with controllable morphology and crystallinity were prepared via adjusting the heat-treating temperature, and their electrochemical performances were investigated. The results showed that changing the heat-treating temperature can effectively control the structure and electrochemical property of the as-made products. The urchin-like α-Fe2O3 nanomaterials obtained by heat-treating at 300°C, composed of a mass of the shuttle fibrous brunches, had higher initial discharge capacity(1475 mAhg-1) than those consisting of nanorods formed at 700°C. The above difference is ascribed to the urchin-like samples obtained at the relatively low heat-treating temperature, which, with low crystallinity, large SBET, and well-regulated porous, is helpful to the adsorption of electrolyte and the transport of lithium ion, resulting in the high activity and discharge-charge capacity.

关键词： urchin-like nanomaterials hematite electrochemical performance glucose-guided hydrolyzing-heat-treating approach

ZnO/Gd_(2)O_(3)复合中空微球的制备及其电磁性能研究

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中国稀土学报 2024年第1期42卷 70-79,I0003页

作者：王晶琳聂志颖杨怡均乔儒童国秀浙江师范大学化学与生命科学学院先进催化材料教育部重点实验室浙江金华321004

以水热法一步合成的C/ZnO微球为基材,通过煅烧处理得到ZnO中空多孔微球,随后利用尿素均相沉积方法及煅烧处理成功制备了ZnO/Gd_(2)O_(3)复合吸波材料。通过对样品的形貌、组成、磁性能与电磁特性的表征,讨论了调控尿素的加入量对产物吸... 详细信息

以水热法一步合成的C/ZnO微球为基材,通过煅烧处理得到ZnO中空多孔微球,随后利用尿素均相沉积方法及煅烧处理成功制备了ZnO/Gd_(2)O_(3)复合吸波材料。通过对样品的形貌、组成、磁性能与电磁特性的表征,讨论了调控尿素的加入量对产物吸波性能的影响,同时,探讨了该复合体系的吸波机理。结果显示,将磁性Gd_(2)O_(3)与介电损耗型ZnO相结合设计异质结构,磁损耗的引入能改善阻抗匹配特性。由于双重损耗机制、异质结构和中空多孔结构的协同作用,ZnO/Gd_(2)O_(3)展示了高效的电磁波吸收能力。磁导率和匹配特性随着Gd_(2)O_(3)含量的增加而增大,而高介电常数和衰减特性随着Gd_(2)O_(3)含量的增加而减小。当尿素的加入量为0.5 g时,所得ZnO/Gd_(2)O_(3)-2展示出优良的宽带、高吸收特性,当匹配厚度为3.5 mm时,对应有效吸收带宽为7.08 GHz,其最大吸收为-40.76 dB。

关键词： ZnO/Gd_(2)O_(3) 中空多孔结构吸波性能吸波机制

ZnO花状微球负载NaYF_(4):Yb,Tm复合物的制备及电磁性能

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中国稀土学报 2023年第6期41卷 1094-1103,I0003页

作者：吴丽珊聂志颖杨凯霞温晓怡乔儒童国秀浙江师范大学化学与生命科学学院先进催化材料教育部重点实验室浙江金华321004

采用微波辅助溶剂热-超声浸渍两步法制备了ZnO花状微球负载NaYF_(4):Yb,Tm(ZnO/NaYF_(4):Yb,Tm)复合材料。通过对样品的形貌、组成、静磁与电磁特性的表征,讨论了NaYF_(4):Yb,Tm纳米晶负载量以及煅烧温度对复合材料吸波性能的影响,同时... 详细信息

采用微波辅助溶剂热-超声浸渍两步法制备了ZnO花状微球负载NaYF_(4):Yb,Tm(ZnO/NaYF_(4):Yb,Tm)复合材料。通过对样品的形貌、组成、静磁与电磁特性的表征,讨论了NaYF_(4):Yb,Tm纳米晶负载量以及煅烧温度对复合材料吸波性能的影响,同时,揭示了该复合材料的吸波机制。结果显示,电磁波在ZnO分级花状结构中的多重反射可以提高材料对电磁波的吸收效率。同时,NaYF_(4):Yb,Tm的引入有利于界面极化、缺陷极化的产生。得益于上述优势和异质结构的协同作用,当NaYF_(4):Yb,Tm负载量为0.15mmol时,经500℃煅烧处理所得ZnO/NaYF_(4):Yb,Tm复合材料展示出优异的吸波特性,当匹配厚度为2.0mm时,对应有效吸收带宽为4.89GHz,其最大吸收为-39.38dB。

关键词：氧化锌上转换纳米材料复合材料吸波性能吸波机制