Nanomaterials
·
2020
·Vol. 10
·期 4
·598
·
IF 4.324
Congai Han,Haiyan Zhang,Danfeng Zhang,Yunfei Deng,Junyao Shen,Guoxun Zeng
The reasonable design of magnetic carbon-based composites is of great significance to improving the microwave absorption (MA) performance of the absorber. In this work, ultrafine FeNi3nanocrystals (5–7 nm) embedded in a 3D honeycomb-like carbon matrix (FeNi3@C) were synthesized via a facile strategy that included a drying and carbonization process. Because of the soft magnetic property of the FeNi3nanocrystals and their unique 3D honeycomb-like structure, the FeNi3@C composites exhibit excellent MA abilities. When the filler loading ratio of FeNi3@C/paraffin composites is only 30 wt%, the maximum reflection loss (RL) value is −40.6 dB at 10.04 GHz. Meanwhile, an ultra-wide absorption frequency bandwidth of 13.0 GHz (5.0–18.0 GHz over −10 dB) can be obtained in the thickness range of 2.0–4.5 mm, and this means that the absorber can consume 90% of the incident waves. It benefits from the dual loss components, multiple polarizations, and multiple reflections for improving MA performances of FeNi3@C composites. These observations suggest that the 3D honeycomb-like FeNi3@C composites have broad application prospects in exploring new MA materials that have a wide frequency bandwidth and strong absorption.Keywords:FeNi3@C composites;3D honeycomb-like carbon;microwave absorption
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COMPOSITES COMMUNICATIONS
·
2025
·
IF 7.7
Guodong Han,Fangyuan Qi,Yong Sun,Junxiang Zhou,Yudeng Wang,Sai Sui,Bo Feng,Yuxiang Jia,Xiaoxia Tian,Xiaokun Wang,Jiafu Wang,Shaobo Qu
Biomass-derived porous carbon materials are simple, low-cost, convenient, and sustainable materials with several advantageous features, such as multilevel porosity and structural repeatability. Herein, a new strategy involving the use of peanut shells and Fe 3 O 4 to prepare excellent absorbing materials is reported. During the carbonization process, the peanut shells transform into interconnected honeycomb-like porous carbon and Fe 3 O 4 nanoparticles are synthesized from FeCl 3 · 6H 2 O, FeCl 2 · 4H 2 O, and NH 3 · H 2 O through a hydrothermal method. The obtained microwave absorption materials (MAMs) P-C-800@Fe 3 O 4 (1:0.5) exhibits outstanding MA performance. The composite exhibits the minimum reflection loss ( RL , −59 dB) at a thickness of 3.9 mm, and the effective absorption bandwidth ( RL < −10 dB) reaches 5.98 GHz at 2.3 mm. The synergistic enhancement between dielectric and magnetic losses enhances the MA capability of the honeycomb-like composite materials. Overall, this paper provides a prospective and convenient strategy for preparing biomass-derived honeycomb-like carbon for MA applications.
研究领域:
材料科学
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环境科学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2020
·Vol. 13
·期 21
·4870
·
IF 3.057
Xiao Li,Jun Li,Ying Zhang,Peng Zhao,Ruyan Lei,Baige Yuan,Manman Xia
Ni(OH)2derived from an MOF template was synthesized as an electrode material for supercapacitors. The electrochemical performance of the electrode was adjusted by effectively regulating the morphology of Ni(OH)2. The evolution of electrochemical performance of the electrode with morphology of Ni(OH)2was highlighted in detail, based on which honeycomb-like Ni(OH)2was successfully synthesized, and endowed the electrode with outstanding electrochemical performance. For the three-electrode testing system, honeycomb-like Ni(OH)2exhibited a very high specific capacitance (1865 F·g−1at 1 A·g−1, 1550 F·g−1at 5 mV·s−1). Moreover, it also presented an excellent rate capability and cycling stability, due to 59.46 % of the initial value (1 A·g−1) being retained at 10 A·g−1, and 172% of initial value (first circle at 50 mV·s−1) being retained after 20,000 cycles. With respect to the assembled hybrid supercapacitor, honeycomb-like Ni(OH)2also displayed superior electrochemical performance, with a high energy density (83.9 Wh·kg−1at a power density of 374.8 W·kg−1). The outstanding electrochemical performance of Ni(OH)2should be attributed to its unique honeycomb-like structure, with a very high specific surface area, which greatly accelerates the transformation and diffusion of active ions.Keywords:honeycomb-like structure;Ni-MOF;Ni(OH)2;electrode material;supercapacitor
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
ANALYTICAL CHEMISTRY
·
2019
·
IF 6.35
Luwei Zhang,Shujuan Ma,Yao Chen,Yan Wang,Junjie Ou,Hiroshi Uyama,Mingliang Ye
In the study of glycoproteomics with mass spectrometry, certain pretreatments of samples are required for eliminating the interference of nonglycopeptides and improving the efficiency of glycopeptides detection. Although hydrophilic interaction chromatography (HILIC) has been developed for enrichment of glycosylated peptides, a plethora of hydrophilic materials always suffered from large steric hindrance, great cost, and difficulty with modifications of high-density hydrophilic groups. In this work, a 1 mm thick biomimetic honeycomb chitosan membrane (BHCM) with honeycomb-like accessible macropores was directly prepared by the freeze-casting method as an adsorbent for HILIC. The N-glycopeptides from trypsin digests of immunoglobulin G (IgG), mixture of IgG and bovine serum albumin (BSA), and serum proteins were enriched using this material and compared with a commercial material ZIC-HILIC. The biomimetic membrane could identify as many as 32 N-glycopeptides from the IgG digest, exhibiting high sensitivity (about 50 fmol) and a wide scope for glycopeptide enrichment. A molar ratio of IgG trypsin digest to bovine serum albumin trypsin digest as low as 1/500 verified the outstanding specificity and efficiency for glycopeptide enrichment. In addition, 270 unique N-glycosylation sites of 400 unique glycopeptides from 146 glycosylated proteins were identified from the triplicate analysis of 2 μL human serum. Furthermore, 48 unique O-glycosylation sites of 278 unique O-glycopeptides were identified from the triplicate analysis of 30 μg deglycosylated fetuin digest. These results indicated that the chitosan-based membrane prepared in this work had great potential for pretreatment of samples in glycoproteomics.
研究领域:
生物化学
·
蛋白质组学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF POROUS MATERIALS
·
2022
·Vol. 29
·期 5
·1639-1648
·
IF 2.523
Long Shi-Jia,Si Chang-Dai
Shaddock peel-derived nitrogen doped honeycomb carbon (NHPC) has been prepared by a facile integrated gas expansion, activation and nitrogen doping strategy using urea and potassium carbonate (K 2 CO 3 ) as the mixed activating agents. The thermal decomposition of urea to generate ammonia plays a dual role of a nitrogen source and gas expanding agent, while the K 2 CO 3 plays a pore-creating medium. The NHPC exhibits honeycomb-like microstructure feature and possesses a large specific surface area (1438.5 m 2 g −1 ), high nitrogen doping (6.23 wt%) and well-developed mesopores. Consequently, the NHPC used as electrode for supercapacitor exhibits high specific capacitance of 225 F g −1 at 0.25 A g −1 and good rate capability. In addition, the symmetric supercapacitor fabricated with NHPC material in 1 M K 2 SO 4 aqueous electrolyte delivers high energy density of 18 W h kg −1 operated in the wide voltage of 2.0 V and superior cyclability of 97.8% capacity retention after 30,000 cycles.
研究领域:
材料科学
·
能源存储
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2019
·
IF 6.97
Shunwu Wang,Tijun Wu,Jun Lin,Jing Tian,Yushan Ji,Yan Pei,Shirun Yan,Minghua Qiao,Hualong Xu,Baoning Zong
The direct conversion of CO2 with renewable H2 to aromatics can transform greenhouse gas and intermittent reproducible energies into valuable organic building blocks. However, the catalytic efficiency for this purpose remains low on existing catalysts containing either metal oxides (the methanol route) or iron (the olefin route) as the CO2 hydrogenation component(s). In this contribution, benefitting from the exceptional activity of the honeycomb-structured graphene (HSG)-supported, potassium-promoted iron (FeK1.5/HSG) in hydrogenating CO2 to light olefins, and with the help of the tandem HZSM-5, CO2 was converted to aromatics with a high selectivity of 41% among all the carbon-containing products (inclusive of CO) or 68% among all the hydrocarbons at a CO2 single-pass conversion of 35% and high space velocity of 26000 mL h–1 gcat–1, which results in an unprecedentedly high space time yield of aromatics of 11.8 μmolCO2 gcat–1 s–1. Furthermore, the dual-layer packing configuration of the FeK1.5/HSG-zeolite catalyst enables flexible adjustment of the aromatics spectrum simply by changing the type of the tandem zeolite. This work shows promise for the realization of a high-efficiency and versatile CO2-to-aromatics technology.
研究领域:
催化化学
·
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
LAB ON A CHIP
·
2021
·Vol. 21
·期 20
·3933-3941
·
IF 6.799
Yu He,Zefan Lu,Hongliang Fan,Tao Zhang
Droplet microfluidics is a promising platform for various biological and biomedical applications. Among which, droplet-based digital PCR (ddPCR) is one of the most challenging examples, with practical issues involving possible fusion/fission of droplets during PCR thermocycling and difficulties of indexing them for real-time monitoring. While spatially trapped droplet arrays may be helpful, they currently are either of low trapping density or suffer from high droplet loss. In this paper, we, for the first time, report a photofabricated honeycomb micropillar array (PHMA) for high-density and loss-free droplet trapping. By rationally designing high-aspect-ratio micropillars into a honeycomb configuration, droplets can be captured at a density of 160–250 droplets per mm2 and, more interestingly, without any loss. The PHMA device can be fabricated from several photocurable materials, with one gasproof photopolymer being optimally selected herein to enable the simple design to avoid sample evaporation and tedious surface modification, thereby making the fabrication very convenient. Moreover, by using a photocurable oil as a continuous phase, the trapped droplets can be further immobilized, and thus, become more stable even in PCR thermocycling. With these features, the proposed PHMA has shown promising potential in ddPCR, and is expected to find a wide range of applications in various biological and biomedical research.
研究领域:
生物技术
·
医学检测
·
分子生物学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2020
·Vol. 32
·期 21
·25725-25734
·
IF 2.22
Wang Ruoming,Bai Pengwei,Zhao Biao,Bai Zhongyi,Guo Xiaoqin,Zhang Rui
In this work, the honeycomb-like SnO 2 with excellent microwave absorbing (MA) capability was successfully prepared by a template method. Furthermore, honeycomb-like SnO 2 configuration with various pore sizes can be prepared by altering the size of polystyrene (PS) nano-sphere. The microstructure, crystallographic structure, elemental chemical state and MA properties of honeycomb-like SnO 2 were measured by Scanning electron microscopy (SEM), X-ray diffraction (XRD), Thermogravimetric-difffferential scanning calorimetry (TG-DSC) and Vector network analyzer (VNA), respectively. Interestingly, the microwave absorption properties were determined by their honeycomb configurations. Furthermore, honeycomb SnO 2 prepared using 148 nm PS spheres as template, presented a minimal RL of −47.4 dB at 11.1 GHz with the layer thickness of 3.2 mm. Meanwhile, the value of RL less than -10 dB was found in the range of 9.8–15.2 GHz. The combination of interfacial polarization, dielectric loss and cellular structure can inhibit the propagation of electromagnetic waves and dissipate microwave energy through heat or other forms. It is believed that the honeycomb-like structures could be expected to be candidates for a new generation of absorbing materials.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
Small
·
2022
·Vol. 18
·期 17
·2107380
·
IF 15.153
Kunyang Zou,Weitao Jing,Xin Dai,Xinxing Chen,Ming Shi,Zhiyin Yao,Ting Zhu,Junjie Sun,Yuanzhen Chen,Yan Liu,Yongning Liu
High energy density and long cycle life of lithium–sulfur (Li–S) batteries suffer from the shuttle/expansion effect. Sufficient sulfur storage space, local fixation of polysulfides, and outstanding electrical conductivity are crucial for a robust cathode host. Herein, a modified template method is proposed to synthesize a highly regular and uniform nitrogen/oxygen dual-doped honeycomb-like carbon as sulfur host (N/O-HC-S). The unique structure not only offers physical entrapment for polysulfides (LiPSs) but also provides chemical adsorption and catalytic conversion sites of polysulfides. In addition, this structure offers enough space for loading sulfur, and a regular space of nanometer size can effectively prevent sulfur particles from accumulating. As expected, the as-prepared N/O-HC900-S with high areal sulfur loading (7.4 mg cm −2 ) shows a high areal specific capacity of 7.35 mAh cm −2 at 0.2 C. Theoretical calculations also reveal that the strong chemical immobilization and catalytic conversion of LiPSs attributed to the spin density and charge distribution of carbon atoms will be influenced by the neighbor nitrogen/oxygen dopants. This structure that provides cooperative chemical adsorption, high lithium ions flux, and catalytic conversion for LiPSs can offer a new strategy for constructing a polysulfide confinement structure to achieve robust Li–S batteries.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2019
·
IF 6.361
Hongri Wan,Xiaofang Hu
Sulfur-doped honeycomb-like 3D porous carbon (SHC) from bagasse waste is efficiently synthesized using a simple, economically feasible and environmentally friendly approach. SHC, which has a unique porous structure with the coexistence of macro-, meso- and micropore structures, affords facile storage and transport channels for both Li + and Na + . As an anode material for lithium ion batteries (LIBs), SHC provides a superior electrochemical reversible specific capacity (690.9 mAh g −1 at 0.1 A g −1 after 100 cycles and 229 mAh g −1 after 500 cycles at 5 A g −1 ). When used as an anode for sodium ion batteries (SIBs), SHC exhibits an excellent reversible specific capacity of 505.8 mAh g −1 at 0.1 A g −1 after 100 cycles and 108 mAh g −1 after 500 cycles at 5 A g −1 . This study demonstrates a simple strategy to synthesize SHC with excellent electrochemical performance for LIBs and SIBs from natural waste materials.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
DALTON TRANSACTIONS
·
2015
·Vol. 44
·期 47
·20562-20567
·
IF 4.197
Su-Yun Zhang,Wen-Bin Guo,Ming Yang,Ying-Ying Tang,Mei-Yan Cui,Nan-Nan Wang,Zhang-Zhen He
Cu5(VO4)2(OH)4 (turanite) is a layered compound, exhibiting a copper(II) oxide layer in the [0 1 1] plane composed of edge-sharing CuO6 octahedra. Each Cu–O layer is further separated by VO4 tetrahedra. Closer scrutiny found that the copper(II) oxide layer in the compound represents a totally new geometrically-frustrated lattice, a 1/6 depleted triangular lattice. More specifically, the spin network in the [0 1 1] plane is formed by the alternate ranking of triangular and honeycomb strips. Magnetic measurements show that the Cu5(VO4)2(OH)4 behaves as a spin-1/2 ferrimagnet with a Tc = ∼4.5 K. It exhibits an unusual 1/5 magnetization plateau arising from the competition between antiferromagnetic and ferromagnetic interactions caused by the strong frustration. The possible spin-arrangements are also suggested.
研究领域:
物理学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2017
·
IF 5.951
Jingxian Jiang,Qinghua Zhang,Xiaoli Zhan,Fengqiu Chen
The disposal of oily wastewater has attracted extensive attention worldwide these days. Emerging environmentally friendly materials with large capacity and high selectivity that can effectively absorb oil and organic solvents from water or realize oil/water separation are in high demand. Herein, we demonstrated the facile fabrication of a sustainable, ecofriendly, biomass-derived, honeycomblike aerogel, taking lignin, agarose, and poly(vinyl alcohol) (PVA) as basic ingredients. The aerogel possessed porous three-dimensional (3D) cellular structure with tunable low density (ρ < 0.052 g cm–3) and featured good flexibility and compressibility. The modified aerogel, which was able to achieve switching from the absorption of oil and organic solvents to desorption just by altering the medium pH, was obtained simply through immersing the original aerogel into a solution of the synthesized copolymer containing pH-responsive component poly(2-(dimethylamino)ethyl methacrylate) (pDMAEMA). The absorption capacity of the modified aerogel for oil and organic solvents was in the range of 20–40 times its own weight, which was also adjustable via controlling the concentration of starting materials. The reusability of the modified aerogel could be carried out by both manual squeezing and pH-induced desorption, further broadening its application fields. The successful design of the biomass-derived modified aerogel with two-way reusability could provide new thoughts for the design of multifunctional oil absorbents, also giving efficient and sustainable options for water treatment and environmental protection.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）