CARBON
·
2024
·
IF 10.5
Xiaotong Sun,Ze Wu,Xiuli Tan,Youqiang Xing,Peng Huang,Bingjue Li,Lei Liu
Research on developing highly efficient microwave absorption (MA) absorbers is crucial for addressing electromagnetic (EM) pollution and advancing stealth technology. MXene, a new class of MA materials, have been widely studied . Nevertheless, MXene often faces challenges such as high self-stacking and excessive electrical conductivity, which lead to poor impedance matching. To overcome these problems, the unique manufacturing produces an overall homogeneous and locally aggregated MXene in the form of island chains, enhancing electrical conductivity and polarization loss while alleviating the self-stacking problem of MXene nanosheets. Further improvement is achieved by modifying the N–CNF@MXene aerogel with MoS 2 through atomic layer deposition (ALD). This modification resulted in a layered core-sheath structure featuring the N–CNF@MXene@MoS 2 aerogel (NCMMA) absorber. Importantly, this process preserved the intrinsic structure of the material while significantly enhancing its MA performance. NCMMA has a minimum reflection loss RL min of −78.32 dB (3.49 mm) with a fill factor of only 3.97 %. The effective absorption bandwidth (EAB) is 7.58 GHz (2.5 mm), covering the Ku band. The unique joint process design of hierarchical core-sheath in situ heterogeneous interfaces combined with the complex interpenetrating conductive network structure employed in this work is a strong candidate for MA materials for next-generation lightweight stealth coatings.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2018
·Vol. 5
·期 4
·932-938
·
IF 5.106
Haocheng Yuan,Yuqiang Jin,Jinle Lan,Yuan Liu,Yunhua Yu,Xiaoping Yang
The poor reversibility of the first conversion reaction (SnO2 + 4Li+ + 4e− → Sn + 2Li2O) and the inferior electrical conductivity of the resulting Li2O make tin oxides not make full use of their lithium storage performance. In this study, various amounts of SnSe nanorods were in situ incorporated into SnOx@CNFs via electrospinning and thermal treatment processes. Binder-free SnSe/SnOx@CNFs exhibit a greatly enhanced lithium-ion storage performance due to their higher electrical conductivity, faster Li-ion diffusivity, and better reversible ability. The optimal SnSe/SnOx@CNFs exhibited a higher initial coulombic efficiency (86.5%) and better reversible capacity (740.7 mA h g−1 at 200 mA g−1 after 70 cycles) than pristine SnOx@CNFs (68.1%, 552 mA h g−1 at 200 mA g−1 after 70 cycles). Moreover, the high capacity of the SnSe/SnOx@CNF electrode can be maintained as high as 345 mA h g−1 at 1 A g−1 over 1000 cycles, demonstrating its robust long-term stability. This work provides new insights for designing high-performance tin-based anode materials for lithium-ion batteries.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2020
·
IF 7.182
Chen Hou,Wenqiang Chen,Linhui Fu,Sufeng Zhang,Chen Liang,Yang Wang
In this study, a sulfate radical-advanced oxidation process (SR-AOP) was proposed by utilizing a bimetallic Co/Fe metal-organic frameworks/cellulose nanofiber membrane (Co/Fe bi-MOFs/CNF) as a catalyst for TBBPA degradation. Sulfate radicals (SO 4 –) and hydroxyl radicals (OH · ) were generated through the activation of peroxymonosulfate (PMS) by Co/Fe bi-MOFs/CNF. Co/Fe bi-MOFs/CNF was prepared by a facile solvothermal method and vacuum filtration. CNF acted as a natural substrates material to relieve the agglomeration of loaded MOFs . Additionally the composite membranes was easily separated from the reaction solution. The properties of the composite materials and the main factors that influenced TBBPA degradation were elucidated in detail, along with the TBBPA degradation intermediates, recyclability, and TBBPA degradation pathway. Almost 100 % of TBBPA was degraded within 30 min under optimal conditions, and the rate constant was determined to be 0.764 min −1 . Furthermore, the degradation rate of the composite membrane was 60 % after 4 cycles.
研究领域:
环境科学
·
材料科学
·
化学工程
·
废水处理
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CARBON
·
2022
·
IF 11.307
Zhaoxia Cao,Yahan Wang,Jian Guo,Jingyi Jia,Zhennan Zhang,Yuantao Cui,Yanhong Yin,Mingguo Yang,Shuting Yang
Advanced hierarchical hybrid nanostructures of polar, conductive and catalytic chemical traps/carbon with rationally tailored components, structures, and chemistries are important in determining the performance of lithium-sulfur (Li–S) batteries. Herein we propose a facile strategy to prepare 3D-structured CNF@graphene-CoSe (CNF@G L -CoSe) cable/sheath heterostructure with the in-situ formed CoSe as a catalyst for graphene-like carbon growth and Se as a catalyst promoter. The architecture integrates high electrical conductivity , effective ion transport, notable polysulfide entrapment, and polysulfide redox kinetics, availing lithium/sulfur conversion when applied as an interlayer in a Li–S battery . As expected, the battery delivered a low decay of 0.053% per cycle over 700 cycles at 1 C. The capacity even remained 649.4 and 524.5 mA h g −1 at 4 and 6 C, respectively. Furthermore, an areal capacity of about 3 mA h cm −2 at 0.1 C after long-term tests can still maintain with sulfur loading of 4.5 mg cm −2 .
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Hongjun Wang,Jiafu Wang,Wentong Li,Zhe Li,Xiaoyu Zhang,Weitao Zheng,Tan Su,Jiaqi Zhang
The utilization of conductive hydrogels , particularly in the domain of wearable technology, has garnered substantial attention. However, the limited mechanical properties, low sensitivity, and lack of multifunctionality in conventional conductive hydrogels constrain their potential applications. Thus, the endeavor to develop conductive hydrogels with exceptional comprehensive performance remains a formidable challenge. In this investigation, chitosan quaternary ammonium salts and the conductive polymer poly (3,4-ethylenedioxythiophene)-poly (styrenesulfonate) were employed as precursor materials, incorporating carboxylated cellulose nanofibers , to synthesize a novel double-crosslinked network hydrogel. The resulting hydrogel specimen exhibited noteworthy tensile strength (2.13 MPa), significantly enhanced elongation (547%), favorable strain sensitivity (Gauge Factor ranging from 0.91 to 9.78), and electrical self-healing capabilities. Additionally, it demonstrated accurate detection of subtle human movements and conversion of raw data into binary data. This research provides valuable insights into the advancement of conductive hydrogels for wearable soft electronics.
研究领域:
材料科学
·
生物医学工程
·
柔性电子学
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2025
·
IF 12.1
Yongqian Shi,Yanjun Zhu,Shan Liu,Libi Fu,Juntian Chen,Jiawen Liu,Longcheng Tang,Jiefeng Gao,Pingan Song
There is a significant increase in the demand for lightweight and compressible electromagnetic interference (EMI) shielding materials in various fields. Though MXene aerogels hold immense potential as EMI shielding materials, several shortcomings including poor water resistance, low mechanical robustness, easy oxidation, and high cost limits of their wide application. This work reported a novel strategy involving the co-assembly of MXene and cellulose nanofibers (CNF) through directional freezing and freeze-drying, followed by the capsulation-concreting of a thin layer of flame-retardant polydimethylsiloxane (PDMS) onto the aerogel, to multi-hierarchically construct a series of high-performance CNF/MXene/PDMS composite aerogels. The lightweight CNF/MXene/PDMS/MPP-Zr@PDA composite aerogel achieved ultrahigh EMI shielding effectiveness of 96.8 dB (X-band) and utilization efficiency of 1713.27 dB g g −1 . Furthermore, the PDMS coating effectively imparted excellent compressibility and durability to the 3D scaffold, resulting in a compressive strength of 17.01 kPa for the composite aerogel, representing 199.5% increase compared to CNF aerogel. Additionally, the composite aerogel exhibited outstanding flame-retardant properties (54.6% reduction in heat release rate), ultralow thermal conductivity of 0.0530 W m −1 K −1 and excellent hydrophobicity. Therefore, the durable and flame-retardant CNF/MXene/PDMS composite aerogels hold promising applications in EMI protection, thermal management, smart fire detection, and other specific fields.
研究领域:
材料科学
·
化学工程
·
电子工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Today Chemistry
·
2025
·
IF 6.7
Shumin Xu,Shilong Liu,Gao Liu,Gehui Li,Yi Xu
Oil spills have caused serious environmental problems, making oil absorbing materials highly important. Creating polymeric aerogels with compressive resilience, superhydrophobicity, high absorption capacity, and excellent regeneration capability remains challenging. In this study, polyacrylonitrile (PAN) nanofibers prepared by electrospinning were used as the aerogel skeleton, with carbon nanofiber (CNF) serving as flame retardants and conductive agents, and benzoxazine (BOZ) as a crosslinking agent. The composite nanofiber aerogels (PAN/PBOZ/CNF-x) were prepared through freeze-drying, followed by thermal curing of ring-opening of oxazine. The low-density aerogel (0.0113g/cm 3 ) exhibited remarkable properties, including over 96% compressive recovery after 30 cycles at 60% strain, superhydrophobicity (WCA = 150.6°), and low thermal conductivity (0.0346W/m·K at 25°C). Furthermore, they demonstrated high absorption capacities between 51.4 and 104.8 g/g for various organic solvents and realized rapid separation of oil-in-water emulsion, such as dichloromethane, with a maximum separation flux of 3022.59 L m −2 h −1 . Additionally, the aerogels showed excellent thermal stability (with a char yield of 83.6 % at 800°C for PAN/PBOZ/CNF-0.1 aerogel) and outstanding flame retardancy, endowing the aerogels with combustion regeneration capability, and providing a fast (∼1s) and durable (∼400s) hazard alarm response after fire removal, retaining 81.8% of their initial absorption capacity after ten combustion-absorption cycles. The multifunctionality of PAN/PBOZ/CNF-x aerogels offers a new strategy for designing advanced multifunctional aerogels.
研究领域:
材料科学
·
环境科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2025
·
IF 12.5
Jinping Peng,Rongwei Fu,Yihui Huang,Jinqing Lu,Xiaofeng Xie,Zhenkun Xue,Mingjie Chen,Xingrou Wu,Hangbo Yue,Haiyan Mai
Alkaline aqueous solutions facilitate the rapid extraction of high-performance cellulose nanofiber (CNF) at 15 °C. However, the role and mechanism of NaOH in this process remain unclear. This study investigated the dissolution process of cellulose by controlling the NaOH concentration (1–7 wt%) at 15 °C and explored the effect and underlying mechanism of the NaOH concentration on cellulose dissolution in alkaline solvents. The results showed that the addition of NaOH strengthened the hydrogen bonding network of the solvent, whereas the addition of urea and thiourea promoted the dissolution of cellulose. The higher the concentration of NaOH is, the smaller the volume of hydrate molecules formed; smaller molecules more readily enter the cellulose molecules and form new hydrogen bonds with cellulose molecular chains, thereby destroying the original hydrogen bonds between cellulose molecules and their crystal structure. During dissolution, cellulose decomposes into microfibrils, and nanosized cellulose separates; moreover, the diameter and length of the CNF decrease with increasing NaOH concentration. When the concentration of NaOH reaches 7 %, the cellulose is completely broken down into CNF, and the yield is >60 %. As dissolution progresses, the crystallinity of cellulose first increases and then decreases (75.95 %–81.00 %–77.02 %), but its crystal size remains unchanged.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2021
·
IF 5.161
Bingnan Yuan,Minghui Guo,Zhanhua Huang,Nithesh Naik,Qian Hu,Zhanhu Guo
A UV-shielding, Hydrophobic and transparent coating was developed to improve the weathering resistance properties of wood materials while maintaining the natural aesthetic texture of the wood. Graphitic carbon nitride nanosheets (gCNNS) were used as nontoxic and metal-free UV absorber. Cellulose nanofibril (CNF) was selected as an environment-friendly and renewable film-forming carrier, which addressed the issues of agglomeration and low composite adhesion of gCNNS on the wood surface. The gCNNS/CNF composite coating was formulated on the wood surface via spin coating method. The following hydrophobic treated by thermal chemical vapor deposition (CVD) method was to solve the problem of rainwater erosion in outdoor application. After 15-day accelerated weathering tests, the total color change of the treated sample was 79.6% lower than that of the untreated one. Our newly-designed environment-friendly and weathering resistance coatings will be applied to a wide variety of substrates in the future.
研究领域:
材料科学
·
木材科学
·
环境科学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2023
·Vol. 12
·期 3
·1617-1628
·
IF 11.9
Meng Ma,Wenqin Shao,Qindan Chu,Wenting Tao,Si Chen,Yanqin Shi,Huiwen He,Yulu Zhu,Xu Wang
With the strong support of the government for emerging technology industries, electromagnetic waves have brought convenience to people's lives, but also become an undeniable new source of pollution. Therefore, it is vital to develop new high-performance electromagnetic shielding materials. Herein, we designed a well-structured asymmetrical gradient multilayer composite film by constructing a controllable electromagnetic gradient. Using cellulose nanofibers as the matrix, a layer-by-layer filtration method was used to rationally distribute FeCo@rGO and MXene fillers to build an ordered multilayer structure that provides alternating conductive and magnetic gradients. Owing to gradient absorption shielding and reflection mechanisms for electromagnetic waves within the film layer, the EMI shielding efficiency (EMI SE) of the asymmetrical gradient alternating six-layer composite film reached 45.2 dB (X-band), and the reflection coefficient was reduced to 0.71 when 20 wt% filler was added. In addition, this composite film has good thermal conductivity and mechanical properties, exhibiting thermal conductivity of 2.90 W (m−1 K−1) and tensile strength of 26.2 MPa. This strategy provides a feasible approach for designing electromagnetic shielding composite materials with adjustable electromagnetic properties and has significant practical significance in expanding the application of MXene-based composite materials.
研究领域:
材料科学
·
电磁学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Xiuli Xie,Xiaotong Wang,Yang Zhang,Long Fang,Jiangshan Feng,Shaohong Liu,Dingshan Yu,Fangming Zhu,Xudong Chen
Herein, we develop a new intelligent moisture-sensitive hybrid aerogel by evenly embedding a proton-conductive covalent organic framework (COF-2SO3H) into a carboxylated cellulose nanofiber network (CNF-C) for water harvesting and spontaneous sustained electricity production from ambient humidity and human respiration. Our strategy first exploits the “suspending agent” role of CNF-C to stably disperse COF materials in water for forming uniform hierarchical hybrid structures. By utilizing the synergy of COF-2SO3H and CNF-C together with their inherent structure merits and surface group effects, the hybrid aerogel displays increased water uptake and ion conductivity. Upon asymmetric moisturization, it can create a self-maintained moisture gradient to engender a concentration difference for mobile Na+ and H+, resulting in efficient charge separation and diffusion. Thus, the hybrid aerogel-based coin-type generator achieves a continuous output voltage of ∼0.55 V for at least 5 h in ambient environments in contrast to that using pure CNF-C and carbon-based generators with transient voltage response. Intriguingly, the wearable generator with an aerogel in a mask is more sensitive to human respiration and achieves repeatable and reliable self-charge for persistent electricity along with an increased output voltage of up to 1.0 V and much faster self-charge (only 3 min), both of which surpass most reported moisture-enabled generators.
研究领域:
材料科学
·
能源
·
环境科学
·
纳米技术
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2020
·Vol. 9
·期 4
·2205-2213
·
IF 11.301
Jiayi Li,Hongwei Zhang,Linqu Luo,Hao Li,Junyu He,Hongliang Zu,Lei Liu,Hao Liu,Fengyun Wang,Jianjun Song
Lithium–sulfur batteries (LSBs) have shown great potential for application in high-density energy storage systems. However, the performance of LSBs is severely hindered by the shuttle effect and the sluggish reaction kinetics of lithium polysulfides (LiPSs). Here, a Janus Fe3C/N-CNF@RGO electrode consisting of a 1D Fe3C-decorated N-doped carbon nanofibers (Fe3C/N-CNFs) side and a 2D reduced graphene oxide (RGO) side was applied as a free-standing carrier for the Li2S6 catholyte to improve the overall electrochemical performance of LSBs. The Fe3C/N-CNF layer endows the cathode with strong chemisorption abilities for LiPSs and accelerated the redox kinetics via catalyzing the conversion of LiPSs. The 2D RGO sheets serve as a microscopic physical barrier and further resist the shuttling of LiPSs. Like a hunter's trap, behind the trap lies a net. Moreover, the 3D hierarchical conductive network based on 1D N-CNF and 2D RGO sheets enables fast electron transfer. Based on the synergetic effects of chemical immobilization, catalytic abilities, and a physical barrier in a 3D conductive network, LSBs with optimal Fe3C/N-CNF@RGO electrodes exhibit robust long-term cycling stability (a decay rate of only 0.0089% per cycle at 0.5C for 300 cycles), superior rate capabilities (821.7 mA h g−1 at 2.0C), and stable cycling performance at high sulfur loading (6.29 mg cm−2). This work defines an emerging viewpoint relating to the design of novel sulfur carriers with multiple synergistic effects for application in LSBs.
研究领域:
储能
·
电化学
·
材料科学
·
纳米材料
·
电池技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）