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Nano-Micro Letters 2025年第1期17卷 191-204页

作者： Zizhuang He Lingzi Shi Ran Sun Lianfei Ding Mukun He Jiaming Li Hua Guo Tiande Gao panbo Liu School of Chemistry and Chemical Engineering Northwestern Polytechnical UniversityXi’an 710129People’s Republic of China School of Marine Science and Technology Northwestern Polytechnical UniversityXi’an 710072People’s Republic of China

Gradient magnetic heterointerfaces have injected infinite vitality in optimizing impedance matching,adjusting dielectric/magnetic resonance and promoting electromagnetic(EM)wave absorption,but still exist a significant challenging in regulating local phase ***,accordion-shaped Co/Co_(3)O_(4)@N-doped carbon nanosheets(Co/Co_(3)O_(4)@NC)with gradient magnetic heterointerfaces have been fabricated via the cooperative high-temperature carbonization and lowtemperature oxidation *** results indicate that the surface epitaxial growth of crystal Co_(3)O_(4) domains on local Co nanoparticles realizes the adjustment of magnetic-heteroatomic components,which are beneficial for optimizing impedance matching and interfacial ***,gradient magnetic heterointerfaces simultaneously realize magnetic coupling,and long-range magnetic ***,the synthesized Co/Co_(3)O_(4)@NC absorbents display the strong electromagnetic wave attenuation capability of−53.5 dB at a thickness of 3.0 mm with an effective absorption bandwidth of 5.36 GHz,both are superior to those of single magnetic domains embedded in carbon *** design concept provides us an inspiration in optimizing interfacial polarization,regulating magnetic coupling and promoting electromagnetic wave absorption.

关键词： Magnetic heterointerfaces Phase evolution Interfacial polarization Magnetic coupling Electromagnetic wave absorption

Temporal and spatial characteristics of PM_(2.5) transport fluxes of typical inland and coastal cities in China

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Journal of Environmental Sciences 2021年第5期33卷 229-245页

作者： panbo Guan Xiaoqi Wicmg Shuiyuan Cheng Hanyu Zhang Key Laboratory of Beijing on Regional Air Pollution Control Beijing University of TechnologyBeijing100124China

Local pollution and the cross-boundary transmission of pollutants between cities have an inevitable impact on the atmosphere. Quantitative assessments of the contribution of transport to pollution in inland and coastal cities are necessary for the implementation of practical, regional, and joint emission control strategies. In this study, the Comprehensive Air Quality Model(CAMx), together with the Weather Research and Forecasting model(WRF), was used to simulate the contributions to pollution of different cities in 2016. The monthly inflow, outflow, and net flux from the ground to the extended layers served as the three main indicators for the analysis of the interactions of PM_(2.5) transport between adjacent cities. Between inland and coastal cities, the magnitude of inflow and outflow are larger in the former than in the latter. The inflow flux in the inland cities(Beijing and Shijiazhuang) was 10.6 and 10.7 kt/day, respectively, while that in the coastal cities(Tianjin, Shanghai, Hefei, Nanjing, and Hangzhou) was 9.1, 3.3, 5.8, 4.4, and 3.7 kt/day, respectively. In terms of variation over the year, the strongest inflow in the BTH region occurred in April, followed by October, July, and January, while that in the coastal cities in YRD occurred in January, followed by October, April, and July. Therefore, based on the flux intensity calculations and the transport flux pathways, effective joint control measures can be provided with scientific support, and a better understanding of the evolutionary mechanism among inland and coastal cities can be acquired.

关键词： PM_(2.5)flux modeling system regional transport inland cities coastal cities

Enhanced Electromagnetic Wave Absorption Properties of Poly(3,4-ethylenedioxythiophene) Nanofi ber-Decorated Graphene Sheets by Non-covalent Interactions

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Nano-Micro Letters 2016年第2期8卷 131-136页

作者： Xiang Zhang Ying Huang panbo Liu Key Laboratory of Space Applied Physics and Chemistry Ministry of Education School of Science Northwestern Polytechnical University

Graphene sheets(GNs) have high conductivity, but they exhibit weak electromagnetic(EM) wave absorption performance. Here, poly(3,4-ethylenedioxythiophene)(PEDOT) nanofibers were decorated on the surface of GNs in which the residual defects and groups act as the active sites and therefore are beneficial for the deposition of PEDOT *** SEM images display that PEDOT nanofibers are successfully decorated on the surface of GNs through in situ polymerization. The diameter of the PEDOT nanofibers were ranged from 15 to 50 nm with hundreds of nanometers in length. The EM wave absorption properties of graphene, PEDOT, and GNs-PEDOT were also investigated. Compared to pure graphene and PEDOT, the EM wave absorption properties of GNs-PEDOT improved significantly. The maximum value of RLwas up to-48.1 d B at 10.5 GHz with a thickness of only 2 mm. Meanwhile, the absorption bandwidth of RL values below-10 d B was 9.4 GHz(5.8–12.3, 12.9–15.8 GHz) in the thickness of 1.5–3 mm. The enhancement is attributed to the modification of PEDOT and the unique structure of nanofibers. On one hand, the deposition of PEDOT nanofibers on the surface of GNs decreases the conductivity of graphene, and makes impedance match better. On the other hand, the unique structure of PEDOT nanofibers results in relatively large specific surfaces areas, providing more active sites for reflection and scattering of EM waves. Therefore, our findings demonstrate that the deposition of conducting polymers on GNs by non-covalent bond is an efficient way to fabricate strong EM wave absorbers.

关键词： Graphene PEDOT Nanofibers Electromagnetic wave absorption

Metal–phenolic coordination crystals derived magnetic hollow carbon spheres for ultrahigh electromagnetic wave absorption

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Nano Research 2024年第3期17卷 1616-1624页

作者： Hanxiao Xu Zizhuang He Yiruo Wang Xiangru Ren panbo Liu School of Chemistry and Chemical Engineering Northwestern Polytechnical UniversityXi’an 710129China

Owing to the tunable compositions and versatile functionality,the development of eco-friendly metal–phenolic coordination crystals derivatives is highly anticipated for electromagnetic wave *** this study,three kinds of magnetic hollow carbon spheres(HCSs)with macro-meso-microporous characteristics,including Fe/HCS,Co/HCS,and CoNi/HCS,are successfully fabricated via the co-operative hard template and self-assembling process,in which magnetic particles are encapsulated in carbon shell matrix after the pyrolysis of metal–polyphenol coordination crystals and further subsequent template *** the one hand,hierarchical macro-meso-micropores effectively balance the impedance gap between absorbers and air and introduce structural defects or distortion,leading to matched impedance and enhanced dipolar/defect *** the other hand,wrapped magnetic particles provide uncountable hetero-interfaces and induce ferromagnetic resonance,resulting in strengthened interfacial polarization and additional magnetic *** particular,enhanced minimum reflection loss(RL,min)and broadband effective absorption bandwidth(EAB)are achieved with only 10 wt.%filler ***,the RL,min and EAB values are-57.5 dB and 7.2 GHz for Fe/HCS,-50.0 dB and 5.8 GHz for Co/HCS,and-52.1 dB and 6.7 GHz for CoNi/HCS,***,this work provides us a modular-assembly strategy to regulate the hollow cavity of absorbers and simultaneously manipulates the chemical components of absorbers to regulate electromagnetic wave absorption performance.

关键词： hollow engineering hierarchical pores hetero-interfaces synergetic effect electromagnetic wave absorption

Synthesis of covalently bonded reduced graphene oxide-Fe_(3)O_(4) nanocomposites for efficient electromagnetic wave absorption

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Journal of Materials Science & Technology 2021年第13期72卷 93-103页

作者： Xudong Liu Ying Huang Ling Ding Xiaoxiao Zhao panbo Liu Tiehu Li MOE Key Laboratory of Material Physics and Chemistry Under Extraordinary Conditions School of Chemistry and Chemical EngineeringNorthwestern Polytechnical UniversityXi’an 710072China NPU-NCP Joint International Research Center on Advanced Nanomaterials&Defects Engineering State Key Laboratory of Solidification ProcessingShaanxi Engineering Laboratory for Graphene New Carbon Materials and ApplicationsSchool of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi’an 710072China

High-performance electromagnetic(EM)wave absorbers,covalently bonded reduced graphene oxideFe_(3)O_(4) nanocomposites(rGO-Fe_(3)O_(4)),are synthesized via hydrothermal reaction,amidation reaction and reduction *** microstructure,surface element composition and morphology of rGO-Fe_(3)O_(4) nanocomposites are characterized and corresponding EM wave absorption properties are analyzed in great *** demonstrates that Fe_(3)O_(4) nanoparticles are successfully covalently grafted onto graphene by amide *** the mass ratio of rGO and Fe_(3)O_(4) is 2:1(sample S2),the absorber exhibits the excellent EM wave absorption performance that the maximum reflection loss(RL)reaches up to-48.6 dB at 14.4 GHz,while the effective absorption bandwidth(RL<-10 dB)is 6.32 GHz(11.68-18.0 GHz)with a matching thickness of 2.1 ***,radar cross section(RCS)simulation calculation is also adopted to evaluate the ability of absorbers to scatter EM waves,which proves again that the absorption performance of absorber S2 is *** outstanding EM wave absorption performance is attributed to the synergistic effect between dielectric and magnetic loss,good attenuation ability and excellent impedance ***,covalent bonds considered to be carrier channels can facilitate electron migration,adjust EM parameters and then enhance EM wave absorption perfo *** work provides a possible method for preparing efficient EM wave absorbers.

关键词： Covalent bond EM wave absorption RCS simulation calculation rGO-Fe_(3)O_(4)nanocomposites

Multi-heteroatom doped porous carbon derived from insect feces for capacitance-enhanced sodium-ion storage

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Journal of Energy Chemistry 2021年第3期30卷 482-492页

作者： Chen Chen Ying Huang Zhuoyue Meng Zhipeng Xu panbo Liu Tiehu Li MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions School of Chemistry and Chemical EngineeringNorthwestern Polytechnical UniversityXi’an 710072ShaanxiChina College of Chemistry&Chemical Engineering Xi’an University of Science and TechnologyXi’an 710072ShaanxiChina Shaanxi Joint Laboratory of Graphene Northwestern Polytechnical UniversityXi’an 710072ShaanxiChina

The large-scale application of sodium ion batteries(SIBs)is limited by economic and environmental ***,we prepare multi-heteroatom self-doped hierarchical porous carbon(HHPC)with a honeycomb-like structure by one-step carbonization method using high-yield and low-cost biomass silkworm excrement as a *** an anode for SIB,HHPC-1100 exhibits a capacity of 331.7 mA h g^(-1) at 20 mA g^(-1),while it also reveals remarkable rate performance and stable long cycle capability due to its abundant pore structure and proper amount of hetero atom ***,the synergistic effect of O,N,S,P co-doping in carbon materials on sodium ion adsorption is verified by the first-principles study,which provide a theoretical basis for the prominent electrochemical performance of the material.

关键词： Heteroatom doped Anode Biomass Sodium storage Porous carbon

MOF-derived multifunctional filler reinforced polymer electrolyte for solid-state lithium batteries

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Journal of Energy Chemistry 2021年第9期30卷 259-271页

作者： Zheng Zhang Ying Huang Heng Gao Chao Li Jiaxin Hang panbo Liu MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions School of Chemistry and Chemical EngineeringNorthwestern Polytechnical UniversityXi’an 710072ShaanxiChina

Solid-state lithium batteries(SSLBs) have attracted great interest from researchers due to their inherent high energy density and high safety *** order to develop SSLBs,the following two key problems should be solved:(1) Improving the lithium ion conductivity of solid electrolyte at room temperature;and(2) improving the interface between the electrode and the ***,we propose a new multifunctional filler for reinforcing polymer *** composite solid electrolytes(CSEs)mainly contain a MOF-derived Co-doped hollow porous carbon nanocage,which absorbs Li~+ containing ionic liquid(Li-ILs@HPCN),polyethylene oxide(PEO) and lithium bis(trifluoromethanesulfonyl)*** optimizing the composition of the CSEs,the CSEs membrane with high ionic conductivity(1.91×10^(-4) S cm^(-1) at 30℃),wide electrochemical stability(5.2 V) and high mobility of lithium ion(0.5) was *** at a current density of 0.2 mA cm^(-2),the PILH electrolyte possesses excellent interfacial stability against Li metal in Li symmetrical batteries exceeds 1600 ***,the SSLBs(LFP/PILH/Li) showed excellent cycle stability,and the capacity was maintained at 152.9 and140.0 mA h g^(-1) after 150 cycles at a current density of 0.2 C and 0.5 *** work proposes a completely new strategy for building high-performance SSLBs.

关键词： Solid-state lithium batteries(SSLBs) Solid electrolyte Composite solid electrolytes(CSEs) PEO

MOFs derived magnetic porous carbon microspheres constructed by core-shell Ni@C with high-performance microwave absorption

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Journal of Materials Science & Technology 2021年第29期88卷 56-65页

作者： Sai Gao Guozheng Zhang Yi Wang Xiaopeng Han Ying Huang panbo Liu School of Chemistry and Chemical Engineering Northwestern Polytechnical UniversityXi’an710129China

Lightweight and high-performance are two determining factors for metal-organic-frameworks(MOFs)derived microwave ***,most of the reported MOFs derived absorbers usually possess high filler ***,a series of MOFs derived magnetic porous carbon microspheres with tunable diameter and high specific surface area have been synthesized via a pyrolysis *** synthesized magnetic porous carbon microspheres,constructed by uniformly distributed core-shell Ni@C,exhibit high-performance microwave absorption with a low filler loading of 10 wt%.Considering the mciro-mesoporous structures,matched impedance,strong conductive loss,enhanced dipolar/interfacial polarization as well as strong magnetic coupling network,a minimum reflection loss of-60 dB and an absorption bandwidth of 7.0 GHz can be achieved at 2.6 ***,the bandwidth reaches as wide as 10.2 GHz when the thickness is 4 *** addition,compared with other MOFs derived absorbers,this work provides us a simple strategy for the synthesis of porous carbon microspheres with lightweight and high-performance microwave absorption for practical applications.

关键词： Metal-organic-frameworks Carbon microspheres Magnetic particles Core-shell structure Microwave absorption

Experimental design and theoretical evaluation of nitrogen and phosphorus dual-doped hierarchical porous carbon for high-performance sodium-ion storage

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Journal of Materials Science & Technology 2021年第17期76卷 11-19页

作者： Chen Chen Ying Huang Zhuoyue Meng Mengwei Lu Zhipeng Xu panbo Liu Tiehu Li MOE Key Laboratory of Material Physics and Chemistry Under Extraordinary Conditions School of Chemistry and Chemical EngineeringNorthwestern Polytechnical UniversityXi'an710072China College of Chemistry&Chemical Engineering Xi'an University of Science and TechnologyXi'an710072China Shaanxi Joint Laboratory of Graphene Northwestern Polytechnical UniversityXi'an710072China

Starch has a wide range of sources and can be used as a high-quality precursor for sodium-ion battery anode ***,the carbonization yield and specific capacity of carbon materials obtained by directly pyrolyzing starch are ***,starch is used as the carbon source,and ammonium polyphosphate(APP)is used as the cross-linking agent and dopant to prepare a nitrogen and phosphorus co-doped porous carbon(NPPC).As the anode for sodium-ion batteries,NPPC-2 exhibits a high reversible capacity of 385.8 mAhg^(-1)at 50 mAg^(-1).Even after 1000 cycles at a large current density of 5 Ag^(-1),the reversible capacity can still be maintained at 126.9 mAhg^(-1).Based on detailed data and first-principles calculations,the excellent performance of NPPC is due to the effective doping of nitrogen and phosphorus elements,which distorts the graphite sheet,introduces defects,and increases the graphite layer spacing,thereby enhancing the adsorption capacity of the carbon material for sodium ions,reducing the diffusion barrier of sodium *** work provides a new idea for heteroatom doping and carbon material modification.

关键词： Ammonium polyphosphate Starch N P co-doped Anode Sodium-ion battery

Heteroatoms-doped carbon nanocages with enhanced dipolar and defective polarization toward light-weight microwave absorbers

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Nano Research 2022年第10期15卷 8705-8713页

作者： Hanxiao Xu Guozheng Zhang Yi Wang Yiruo Wang Huanlei Wang Ying Huang panbo Liu School of Chemistry and Chemical Engineering Northwestern Polytechnical UniversityXi’an 710129China School of Materials Science and Engineering Ocean University of ChinaQingdao 266100China

Light-weight and exceptional microwave absorption are two vital characteristics for microwave absorbers in practical applications,but still face ***,we employ a sacrificial template strategy to fabricate heteroatoms-doped carbon nanocages(CNs)via chemical vapor deposition,in which heteroatoms are simultaneously doped into the carbon frameworks by bubbling flowing source *** with CNs,doped heteroatoms,accompanied with the inevitably defective arrangements in the lattice,not only decrease the electrical conductivity and balance the impedance characteristics,but also introduce structuralchemical defects and trigger dominant dipolar/defect *** a result,both the minimum reflection loss(R_(L,min))and effective absorption bandwidth(EAB)greatly increase at an ultralow filler loading of 5 wt.%owing to internal hollow void and high specific surface *** R_(L,min) values reach−53.6,−43.2,and−50.1 dB for N-CNs,S-CNs,and N,S-CNs with the corresponding EAB of 4.9,2.5,and 3.1 GHz,***,this work provides an effective strategy for the construction of heteroatoms-doped hollow carbon frameworks in large-scale production and the obtained doped carbon nanocages can be used as light-weight and high-performance microwave absorbers.

关键词： carbon nanocages hollow structure heteroatoms dipolar resonance microwave absorption