MACROMOLECULAR RAPID COMMUNICATIONS
·
2011
·Vol. 32
·期 21
·1729-1734
·
IF 4.371
Juanping Hu,Xianfeng Wang,Bin Ding,Jinyou Lin,Jianyong Yu,Gang Sun
Electro-spinning/netting (ESN) as a cutting-edge technique evokes much interest because of its ability in the one-step preparation of versatile nano-fiber/net (NFN) membranes. Here, a controllable fabrication of polyurethane (PU) NFN membranes with attractive structures, consisting of common electrospun nanofibers and two-dimensional (2D) soap bubble-like structured nano-nets via an ESN process is reported. The unique nanoscaled NFN architecture can be finely controlled by regulating the solution properties and several ESN process parameters. The versatile PU nano-nets comprising interlinked nanowires with ultrathin diameters (5–40 nm) mean that the NFN structured membranes possess several excellent characteristics, such as an extremely large specific surface area, high porosity and large stacking density, which would be particularly useful for applications in ultrafiltration, special protective clothing, ultrasensitive sensors, catalyst support and so on.
研究领域:
材料科学
·
高分子化学
·
纳米技术
·
膜科学
·
生物医学工程
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Meng Kong,Mingjie Li,Ruoxu Shang,Jingyu Wu,Peisong Yan,Dongmei Xu,Chaoxu Li
Marine shells not only represent a rapidly accumulating type of fishery wastes but also offer a unique sort of hybrid nanomaterials produced greenly and massively in nature. The elaborate “brick and mortar” structures of nacre enabled the synthesis of carbon nanomeshes with <1 nm thickness, hierarchical porosity, and high specific surface area through pyrolysis, in which two-dimensional (2D) organic layers served as the carbonaceous precursor and aragonite platelets as the hard template. Mineral bridges within 2D organic layers templated the formation of mesh pores of 20–70 nm. In contrast to other hydrophobic carbon nanomaterials, these carbon nanomeshes showed super dispersibility in diverse solvents and thus processability for membranes through filtration, patterning, spray-coating, and ink-writing. The carbon membranes with layered structures were capable of serving not only for high-flux filtration and continuous flow absorption but also for electrochemical and strain sensing with high sensitivity. Thus, utilization of marine shells, on one hand, relieves the environmental concern of shellfish waste, on the other hand, offers a facile, green, low-cost, and massive approach to synthesize unique carbon nanomeshes alternative to graphene nanomeshes and applicable in environmental adsorption, filtration, wearable sensors, and flexible microelectronics.
研究领域:
材料科学
·
环境科学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMER
·
2015
·
IF 3.562
Shichao Zhang,Kun Chen,Jianyong Yu,Bin Ding
Numerical models that are capable to quantitatively elaborate the formation of novel two-dimensional (2D) nanonets during electrospinning/netting would have broad technological implications for areas ranging from sensing devices and individual protection to industrial filtration and separation; however, creating such models has proved extremely challenging. Here we report novel numerical models for clarifying the origin, evolution, and regulation of the nanonets via combining the ejection modes of Taylor cone apex and the phase separation of charged droplets. Our models propose two critical condition formulas for the generation of jets and droplets, and a LCST phase diagram combined with concentration sweep paths for the nanonets or non-porous films. The resulting model predications exhibit excellent agreement with the experimental results obtained via varying the solution properties and process parameters. The successful model derivation for the nanonets formation may provide new insights into the design and development of 2D multifunctional nanomaterials for various applications.
研究领域:
材料科学
·
物理学
·
工程学
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2021
·Vol. 18
·期 7
·2104810
·
IF 13.281
Yancong Qiao,Xiaoshi Li,Jiabin Wang,Shourui Ji,Thomas Hirtz,He Tian,Jinming Jian,Tianrui Cui,Ying Dong,Xinwei Xu,Fei Wang,Hong Wang,Jianhua Zhou,Yi Yang,Takao Someya,Tian-Ling Ren
As the aging population increases in many countries, electronic skin (e-skin) for health monitoring has been attracting much attention. However, to realize the industrialization of e-skin, two factors must be optimized. The first is to achieve high comfort, which can significantly improve the user experience. The second is to make the e-skin intelligent, so it can detect and analyze physiological signals at the same time. In this article, intelligent and multifunctional e-skin consisting of laser-scribed graphene and polyurethane (PU) nanomesh is realized with high comfort. The e-skin can be used as a strain sensor with large measurement range (>60%), good sensitivity (GF≈40), high linearity range (60%), and excellent stability (>1000 cycles). By analyzing the morphology of e-skin, a parallel networks model is proposed to express the mechanism of the strain sensor. In addition, laser scribing is also applied to etch the insulating PU, which greatly decreases the impedance in detecting electrophysiology signals. Finally, the e-skin is applied to monitor the electrocardiogram, electroencephalogram (EEG), and electrooculogram signals. A time- and frequency-domain concatenated convolution neural network is built to analyze the EEG signal detected using the e-skin on the forehead and classify the attention level of testers.
研究领域:
生物医学工程
·
柔性电子学
·
可穿戴设备
·
生理监测
·
神经工程
·
材料科学
·
转化医学
✓ 已验证
DOI
高影响因子
FUEL
·
2024
·
IF 6.7
Xiandie Zhang,Haozhe Li,Xuxu Cui,Weiduo Fei,Xinwen Ma,Jiaming Liu,Pingyun Li,Xiaode Guo,Xiang Zhou
Aluminium (Al) powder is the most common solid fuel component in metastable intermolecular composites (MICs). It is used in the field of propellants to provide energy for the flight of rockets and missiles. However, the passivation layer overlaying its surface hinders its energy release. Using fluorine (F)-containing oxidisers may etch the passivation layer, enabling Al to achieve a more direct redox process and improving its energy-release capacity. Herein, NH 4 CuF 3 , which has nano-network structure, was synthesised through the solvo-thermal method, and n-Al was filled into the nano-pore channels using a simple ultrasonic mixing method to form a new n-Al/NH 4 CuF 3 MICs with excellent dispersion and interfacial contact. The thermal decomposition process of NH 4 CuF 3 was investigated, and the results showed that NH 4 CuF 3 could release hydrogen fluoride (HF) and ammonia (NH 3 ) gaseous products. The passivation layer on the surface of the Al powder was etched by HF, and the abundance of gaseous products during the reaction of n-Al/NH 4 CuF 3 Extended the combustion region. This can enhance air capture in the reaction system, minimise reaction sintering and aid in performing external work. Furthermore, n-Al/NH 4 CuF 3 exhibits a lower onset reaction temperature, shorter ignition delay time and greater external work ability than n-Al/CuF 2 and n-Al/CuO.
研究领域:
材料科学
·
燃烧与推进
✓ 已验证
产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2023
·
IF 6.2
Caiqin Wang,Tingting Zhou,Cheng Qian,Lili Chen,Liyuan Hao,Shumeng Fu,Bingguo Feng,Xiaofei Yang
Ti 3 C 2 T x MXene nanonets (MNNs) with 3D fibrous architecture were obtained from Ti 3 C 2 T x MXene nanoplates (MNPs) via surface modifying of alkalization in concentrated KOH solution, which was further combined with carbon nanotube and used as catalyst supports for Pt nanoparticles. By controlling the treatment time of alkalization, the lamellar surface of MNPs was getting into fibration in different extent. The catalytic performances toward hydrogen evolution reaction (HER) of a series of Pt-loaded MNNs catalysts were investigated, in which 1 %Pt-MNNs-9 composite catalyst presented the best hydrogen evolution performance. In detail, 1 %Pt-MNNs-9 with 1 wt.% of Pt loading exhibits an overpotential of 60 mV at 10 mA·cm −2 , which is much lower than 1 % Pt-MNPs (274 mV). It also keeps stable performance for long term stability. The enhanced catalytic activity is probably due to the fact that, Ti 3 C 2 T x MNNs with 3D architecture not only possesses abundant sites to anchor Pt nanoaprticles, but also facilitates the mass and charge transfer, which are significantly beneficial to catalytic reaction. The 3D architecture MXene fibers are expected to have widespread applications including but not limited to energy storage/conversion, and catalytic fields.
研究领域:
材料科学
·
催化化学
·
能源转换
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Jiale Zhang,Zhuangzhuang Ma,Maojian Li,Minghao Lou,Hongqiang Wang,Lichao Jia
Ionogel has gained attention as a promising material for flexible electronic skin (e-skin), due to its exceptional conductivity, compositional stability, and biocompatibility. Nevertheless, establishing a seamless interface between ionogel and human skin remains a significant challenge. This study presents the design and fabrication of a nanonet-supported ionogel with a thickness of ≈16 µm, marking it the thinnest ionogel reported to date. This ultrathin ionogel exhibits remarkable toughness (5.51 MJ m − 3 ), a broad strain range (0–375%), and impressive fatigue resistance, enduring over 3000 cycles. Additionally, it offers excellent water resistance and a high water vapor transmission rate (WVTR), supporting perspiration and enhancing skin breathability. Moreover, the ultrathin ionogel has potential as a carrier in transdermal drug delivery systems (TDDS), highlighting its suitability for biomedical applications. Wearable devices incorporating this ultrathin ionogel facilitate continuous, sensitive, and highly accurate monitoring of physiological signals, positioning it as a promising material for future flexible e-skin material.
研究领域:
材料科学
·
生物医学工程
·
柔性电子皮肤
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2017
·
IF 0
Xiaoming Lou,Qingfeng Fu,Jian Xu,Xin Liu,Chunfu Lin,Jiaxing Han,Yunpeng Luo,Yongjun Chen,Xiaoyong Fan,Jianbao Li
M–Nb–O compounds have been considered as promising anode materials for lithium-ion batteries (LIBs) because of their high capacities, safety, and cyclic stability. However, very limited M–Nb–O anode materials have been developed thus far. Herein, GaNb11O29 with a shear ReO3 crystal structure and a high theoretical capacity of 379 mAh g–1 is intensively explored as a new member in the M–Nb–O family. GaNb11O29 nanowebs (GaNb11O29-N) are synthesized based on a facile single-spinneret electrospinning technique for the first time and are constructed by interconnected GaNb11O29 nanowires with an average diameter of ∼250 nm and a large specific surface area of 10.26 m2 g–1. This intriguing architecture affords good structural stability, restricted self-aggregation, a large electrochemical reaction area, and fast electron/Li+-ion transport, leading to a significant pseudocapacitive behavior and outstanding electrochemical properties of GaNb11O29–N. At 0.1 C, it shows a high specific capacity (264 mAh g–1) with a safe working potential (1.69 V vs Li/Li+) and the highest first-cycle Coulombic efficiency in all of the known M–Nb–O anode materials (96.5%). At 10 C, it exhibits a superior rate capability (a high capacity of 175 mAh g–1) and a durable cyclic stability (a high capacity retention of 87.4% after 1000 cycles). These impressive results indicate that GaNb11O29-N is a high-performance anode material for LIBs.
研究领域:
材料科学
·
能源存储技术
·
纳米技术
✓ 已验证
DOI
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Yanhui Song,Wenbo Sha,Meixiu Song,Peizhi Liu,Jiakang Tian,Hong Wei,Xiaodong Hao,Bingshe Xu,Junjie Guo,Jianguo Liang
Defect-rich metal-based nanomeshes have been regarded as potential effective catalysts for electrocatalytic water splitting, in which nanopores are beneficial to increase active sites and enhance the mass transfer. However, facile synthesis of metal-based nanomeshes still remains a great challenge. Herein, we report the cost-efficient ultrathin nickel molybdenum nanomeshes (NiMoO 4 ) for overall water splitting. The NiMoO 4 possesses outstanding oxygen evolution reaction property (239 mV@10 mA cm −2 ), together with an exceptional cycling stability. Notably, phosphorus (P)-doping endows the NiMoO 4 nanomeshes a superior hydrogen evolution reaction property (144 mV@−10 mA cm −2 ). We also prepare a double electrode system with NiMoO 4 and P-doped NiMoO 4 , and evaluate the performance of overall water splitting (1.68 V @10 mA cm −2 ). The key point of the processing route developed here is the synergistic effect between defect engineering and element doping, which provide a guiding insight for the development of novel catalysts for their practical applications.
研究领域:
材料科学
·
电化学
·
催化科学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS & DESIGN
·
2020
·
IF 6.289
Xiaochen Wu,Lili Lv,Xiangsheng Han,Chaoxu Li
Porous metallic architectures with well-defined networks possess multiple reactivity center and large specific surface area, offer improved catalytic activity, adsorption capacity, and sensing abilities than bulk materials, thus be an increasingly popular materials in various fields. However, it is challenging to synthesis porous metallic structures in a green, facile and scalable way. Using bovine serum albumin (BSA) nanofibrous biofilms as sacrificial templates, a variety of porous metallic nanomeshes were readily formed through the adsorption of ions following by air calcination. The microstructures of the metallic nanomeshes are controllable, with pores ranging from 10 −2 to 10 0 μm and particle diameter of 30–270 nm. Specifically, the Au nanomeshes displayed not only high plasmonic resonance properties as SERS substrates, but also multiple reactivity centers as electrochemical sensor for dopamineand H 2 O 2 .
研究领域:
材料科学
·
纳米技术
·
分析化学
·
生物技术
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Wei Zheng,Li Yang,Xiaodan Yin,Hanchen Feng,Junjiang Fan,Peigen Zhang,Guobing Ying,ZhengMing Sun
2D MXenes have attracted great attention in portable flexible supercapacitors owing to their high volumetric capacitances, excellent electrical conductivity, tunable surface terminations, and good flexibility. However, the low gravimetric capacitances due to the tortuous ion transport in restacked nanosheets may limit the possible applications. Herein, we propose an atomic tailoring strategy to produce nitrogen-doped porous films assembled by Ti 3 C 2 T z MXene nanomesh. The introduced Ti-N-O/Ti-N-OH terminations greatly improve the electrochemical activity, and the rich in-plane pores in Ti 3 C 2 T z nanomesh provide abundant pathways and new active sites for ion transfer/adsorption. Benefiting these surface modifications and structural engineering, the obtained freestanding films achieve ultrahigh gravimetric and volumetric capacitances (700F g −1 or 2023F cm −3 at 1 A g −1 ) and superior rate performance (550F g −1 or 1860F cm −3 at 100 A g −1 ). When assembling into symmetric supercapacitors, high energy densities, and good cycling stability are achieved at room temperature and −40 °C, respectively, demonstrating great promise for practical applications.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
Catalysts
·
2024
·Vol. 14
·期 12
·892
·
IF 3.8
Yangzhou Deng,Yuqi Zhang,Kunkun Wei,Yue Wang,Shihui Zou,Juanjuan Liu
Advanced oxidation catalyzed by metal oxides is a promising approach for degrading organic pollutants in wastewater. A critical strategy to enhance the performance of these catalysts is optimizing the dispersion of their active components through innovative synthesis methods. In this study, we report a one-pot synthesis of g-C3N4nanomeshes supported with highly dispersed VO2catalysts (V-g-C3N4) for the advanced oxidation of methylene blue (MB). The characterization results reveal that the involvement of VCl3in the pyrolysis of melamine facilitates the formation of g-C3N4nanomeshes with abundant amino groups (NH/NH2). The strong interaction between vanadia species and amino groups prevents VO2particles from agglomerating, resulting in a significantly higher vanadia dispersion than V-g-C3N4-im synthesized via the traditional impregnation method. V-g-C3N4exhibits a sophisticated microstructure and surface structure, which leads to a rate constant 2.3-fold higher than V-g-C3N4-im in the catalytic degradation of methylene blue using H2O2as the oxidant. X-ray photoelectron spectroscopy, trapping experiments, and electron paramagnetic resonance measurements reveal that the rapid adsorption and fast diffusion of MB over g-C3N4nanomeshes, together with the efficient H2O2activation into ·OH radicals via the V4+/V5+redox cycle, synergistically contribute to the superior MB removal efficiency of V-g-C3N4. Moreover, V-g-C3N4demonstrates no significant decrease in activity even after the fourth cycle, indicating its excellent stability during the pollutant removal process.
研究领域:
环境科学
·
材料科学
·
催化化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）