Nanoscale
·
2018
·Vol. 10
·期 41
·19360-19366
·
IF 7.233
Shengping Dai,Xiaoshuang Zhou,Shuai Wang,Jianning Ding,Ningyi Yuan
Self-healing conductive elastomers have emerged as a class of novel materials that are important for fabricating human-motion sensors, soft robots and healthcare monitoring systems. Herein, we report on a hydrogel of modified poly(γ-glutamic) acid polymer chains crosslinked by coordination complexes, which exhibits good stretchability (1375%), long-term stability (more than 40 days), and self-healing ability (99.0 ± 1.5% in 3 h). Furthermore, a “sandwich” structure composite was fabricated, which is composed of self-healing hydrogels and Au nanograin-decorated aligned multiwall carbon nanotube sheets. It possesses fast self-healing ability, a low stable electronic resistance of 10 ± 1 Ω sq−1, in the temperature range of −40–90 °C, the humidity range of 10–90%, and a stretching range up to 200%.
研究领域:
材料科学
·
生物医学工程
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产品关联
DOI
PubMed
高影响因子
Polymers
·
2017
·Vol. 9
·期 10
·510
·
IF 3.364
Shuhua Pang,Weiliang Chen,Zhewei Yang,Zheng Liu,Xin Fan,Dong Fang
Polyaniline nanotubes were successfully synthesized by a facile in situ chemical oxidative polymerization method using urea as soft template. When the urea/aniline molar ratio is 3:1, the as-prepared nanotubular polyaniline (PANI-3) shows regular and uniform square capillaries, which provides a high electrode/electrolyte contact, easy ion diffusion and enhanced electroactive regions during the electrochemical process, leading to weak internal resistance and improved electrochemical performance. The PANI-3 sample exhibits a high specific capacitance of 405 F/g at current density of 0.2 A/g, and PANI only has a specific capacitance of 263 F/g. At current density of 1 A/g, the capacitance of PANI-3 is still 263 F/g (64.9% of the capacitance at 0.2 A/g). Such a PANI-3 nanotube, with regular and uniform capillary, is a promising electrode material for high-performance supercapacitors.Keywords:polyaniline;nanotube;urea;template;morphology;electrochemical performance
研究领域:
材料科学
·
电化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Kanaparedu P. C. Sekhar,Kaijie Zhao,Zhiliang Gao,Xuebin Ma,Huimin Geng,Aixin Song,Jiwei Cui
Hypothesis In living systems, dynamic processes like dissipative assembly, polymorph formation, and destabilization of hydrophobic domains play an indispensable role in the biochemical processes. Adaptation of biological self-assembly processes to an amphiphilic molecule leads to the fabrication of intelligent biomaterials with life-like behavior. Experiments An amphiphilic glycolipid molecule was engineered into various dissipative assemblies (vesicles and supramolecular nanotube-composed hydrogels) by using two activation steps, including heating-cooling and shear force in method-1 or boric acid/glycolipid complexation and shear force in method-2. The influence of number of activation steps on vesicle to nanotube phase transitions and activation method on the properties of hydrogels were investigated, where the morphological transformations and destabilization of hydrophobic domains resulted from a bilayer to a higher-order crystal structure. Findings Hydrophobic and hydrophilic cargos encapsulated in the dissipative assemblies (vesicles and injectable hydrogels) can be released in a controlled manner via changing the activation method. The reported adaptive materials engineered by dual activation steps are promising self-assembled systems for programmed release of loaded cargos at a tunable rate.
研究领域:
生物材料科学
·
分子生物学
·
化学
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Xiaoyun Sun,Ke Shi,Siqi Mo,Jinfeng Mei,Jian Rong,Shaomang Wang,Xudong Zheng,Zhongyu Li
A reinforced-concrete-structured sponge based on amino-terminated polydimethylsiloxane (PDMS) and carboxyl carbon nanotubes (CCNTs) is synthesized, without any templates or coatings. The covalent bonding of PDMS and CCNTs generate amide groups which provide considerable hydrogen bonds. The synergistic effect of dynamic hydrogen bonds and flexible PDMS chains contribute to the high elasticity, while CCNTs affect the stress. The compressive and tensile stress-train curves both overlap with the first curves during multiple load-release cycles, at the compressive strain of 80% and the tensile strain of 100%, respectively. The amount of CCNTs determines the porosity, and significantly affects the hydrophobicity. The sponge is applied to static oil adsorption, oil/water emulsion separation and oil-spill treatment. Due to the high elasticity and anti-fatigue performance, the sponge can be repeatedly regenerated using a simple squeezing method. The adsorption capacity still reaches 99.45% after 30 adsorption–desorption cycles. The weight, morphology and hydrophobicity of the sponge maintain unchanged, either. The simulation of oil-spill treatment demonstrates that the sponge can also work efficiently under dynamic conditions. The high elasticity, recyclability and stability propose the sponge to be a promising material for oily-water treatment in complex circumstances.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
Materials
·
2023
·Vol. 16
·期 7
·2606
·
IF 3.4
Wei Cui,Jiahui Fang,Yuanyuan Wan,Xueyu Tao,Litong Guo,Qiyan Feng
In this study, an E-fenton oxidation system based on Co-N co-doped carbon nanotubes (Co-N-CNTs) was designed. The Co-N-CNTs system showed fast degradation efficiency and reusability for the degradation of rhodamine B (RhB). The XRD and SEM results showed that the Co-N co-doped carbon nanotubes with diameters ranging from 40 to 400 nm were successfully prepared. The E-Fenton degradation performance of Co-N-CNTs was investigated via CV, LSV and AC impedance spectroscopy. The yield of H2O2could reach 80 mg/L/h within 60 min, and the optimal voltage and preparation temperature for H2O2yield in this system was −0.7 V (vs. SCE) and 800 °C. For the target pollutant of RhB, the fast removal of RhB was obtained via the Co-N-CNTS/E-Fenton system (about 91% RhB degradation occurred during 60 min), and the •OH played a major role in the RhB degradation. When the Fe2+concentrations increased from 0.3 to 0.4 mM, the RhB degradation efficiency decreased from 91% to about 87%. The valence state of Co in the Co-N-C catalyst drove a Co2+/Co3+cycle, which ensured the catalyst had good E-Fenton degradation efficiency. This work provides new insight into the mechanism of an E-Fenton system with carbon-based catalysts for the efficient degradation of RhB.Keywords:carbon nanotubes;E-Fenton;rhodamine B;degradation;mechanism
研究领域:
环境科学
·
化学工程
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DOI
PubMed
高影响因子
Advanced Composites and Hybrid Materials
·
2023
·Vol. 6
·期 3
·1-9
·
IF 20.1
Xu Ting,Wang Yaxuan,Liu Kun,Zhao Qingshuang,Liang Qidi,Zhang Meng,Si Chuanling
With the depletion of fossil resources and the gradual intensification of environmental pollution, green and sustainable electrochemical devices have aroused intensive attraction. The supercapacitor, demonstrating fast charging rate, high power densities, and long cycling life, has great application prospects in high power output and backup power supply. Herein, an ultralight and robust MXene/carbon nanotube aerogel is constructed by facile directional freezing and subsequent freeze-drying. Benefiting from the strongly π-π interactions between MXene nanosheets and carbon nanotube, the assembled MXene/carbon nanotube composite aerogel exhibits abundant pore structures, superior conductivity, and good mechanical properties. The electrical conductivity of MXene/carbon nanotube aerogel is up to 1600 S m −1 . The MXene/carbon nanotube aerogel can be subjected to 70% compressive strain and retain 85% initial strain over 1000 compress-release cycles. The as-prepared all-solid-state supercapacitor with MXene/carbon nanotube aerogel shows outstanding electrochemical performance (410.7 mF cm −2 at the current density of 0.8 mA cm −2 ). The supercapacitor is flexible and can be bent from 0 to 90° as the cyclic voltammetry curves are almost consistent. Furthermore, the LED can be lighted by four devices in series.
研究领域:
材料科学
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能源技术
·
纳米科技
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产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Zewen Yang,Dandan Jia,Qing Zhao,Depeng Song,Xiaolin Sun,Yuan Zhang,Jing Gao,Takeo Ohsaka,Futoshi Matsumoto,Qiang Shen,Jianfei Wu
The development of lithium-chalcogen batteries containing one active species is limited by bottlenecks. Multichalcogen composites that integrate the advantages of each component while avoiding their defects are desired. Herein, carbon nanotubes (CNT) and carboxylated-CNT (CCNT) are adopted as carriers for active substances consisting of S, Se, and Te at a feed ratio of 8:1:1 (SST811). The electrochemical performance of SST811/CCNT is better than that of SST811/CNT because CCNT contains more oxygen-containing functional groups, allowing the active species to be firmly anchored. Cyclic voltammetry (CV) curves, charge-discharge profiles and in-situ Raman results reveal the solid-phase charge-discharge mechanism of SST811/CCNT in ester electrolyte, consisting of a combination of basic reaction steps. To suppress the shedding of active species during long cycling, a carbon cloth (CC) interlayer is introduced between cathode and separator without altering the inherent reaction mechanism of SST811/CCNT. Under the protection of CC interlayer, the capacity of SST811/CCNT remains at 1219.2 mAh g −1 after 300 cycles, which is 1.5 times that without interlayer. The protective effect of CC interlayer is demonstrated by X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), X-ray diffraction (XRD), and Raman results. This work inspires the further development of lithium-chalcogenide batteries.
研究领域:
电化学
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材料科学
·
能源存储
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纳米复合材料
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电池技术
✓ 已验证
DOI
高影响因子
Journal of Materials Research and Technology-JMR&T
·
2025
·
IF 6.6
Minghang Gong,Yihang Cai,Dongwei Wang,Lei Wu,Yong Wang,Gongwang Cao,Yuwei Liu,Quanzhong Guo,Chuan Wang,Yang Li
During marine navigation, ships inevitably encounter corrosion and biofouling from seawater, necessitating anodes with superior performance for impressed current cathodic protection of hulls. In this study, a hybrid material comprising reduced graphene oxide (RGO) and carboxylated multi-walled carbon nanotubes (CNTs), along with a TiO 2 nanotube arrays (TNTs) interlayer, was introduced into a metal oxide-coated electrode. The RGO-CNTs/RuO 2 –IrO 2 –SnO 2 /TNTs electrode was fabricated via thermal decomposition, and its surface morphology, electrocatalytic activity, practical chlorine evolution and antibacterial performance, as well as accelerated life, were systematically evaluated. The underlying mechanisms by which the hybrid material and interlayer enhance anode performance were analyzed. The results indicate that the electrode achieves a difference of 0.430 V between chlorine evolution potential (CEP) and oxygen evolution potential (OEP), with an accelerated life of 232 h. It effectively exerts a stimulatory effect on microorganisms, thereby achieving superior biofouling resistance. This enhancement is likely attributable to the synergistic effects of RGO-CNTs and TNTs, including barrier effects, labyrinth effect, mechanical reinforcement, and optimized electron transport, which collectively improve the electrocatalytic activity and stability of the anode. This study provides valuable theoretical insights for enhancing the activity and stability of coated electrodes, holding significant promise for applications in marine corrosion protection.
研究领域:
材料科学
·
电化学
·
海洋工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2021
·
IF 5.816
Xu Yang,Zhaoxia Zhang,Xiaoyang Wang,Guanghua Wang,Xinlong Tian,Zhifu Wu
Overcoming the limited light harvest and sluggish charge transfer efficiency has remained a long-standing challenge for the practical application of visible-light driven hydrogen evolution . In this work, a novel cobalt doped titanium nitride interlaced nanotube was synthesized through a facile hydrothermal approach and subsequent ammonia gas nitrification route. The optimized Ti 0·75 Co 0·25 N (molar ratio of Ti:Co:N = 0.75:0.25:1) catalyst delivered the highest hydrogen yield in visible-light-induced water splitting, which was almost 2 times higher than the pristine TiN did. Further structure characterizations have unraveled that the cobalt atoms were partially substituted the titanium atoms in crystallite lattice, generating a significant synergistic regulation on band structure and electronic state. As a result, the narrowed energy bandgap, improved charge carrier mobility and lowered over-potential contributed to the high electron-hole separation efficiency and smoothed interface charge transfer, yielding an enhanced photocatalytic activity . This work is a significant contribution to the design of efficient and stable visible light driven water splitting catalysts.
研究领域:
材料科学
·
催化化学
✓ 已验证
DOI
高影响因子
NANOTECHNOLOGY
·
2021
·Vol. 33
·期 7
·075401
·
IF 3.874
Bo-Qiang Miao,Yi-Ming Liu,Tian-Jiao Wang,Yu Ding,Yu Chen
For the electrochemcial hydrogen production, the oxygen evolution reaction (OER) is a pivotal half-reaction in water splitting. However, OER suffers sluggish kinetics and high overpotential, leading to the increase of overall energy consumption and decrease of the energy efficiency. In this work, high-quality cobalt oxide porous nanotubes (Co3O4-PNTs) are easily obtained by simple self-template approach. One-dimensional (1D) porous structure provides the large specific surface area, enough abundant active atoms and effective mass transfer. In addition, Co3O4-PNTs also own self-stability of 1D architecture, benefitting the their durability for electrocatalytic reaction. Thus, Co3O4-PNTs with optimal annealing temperature and time reveal the attractive alkaline OER performance (Tafel slope of 56 mV dec−1 and 323 mV overpotential at 10 mA cm−2), which outperform the Co3O4 nanoparticles and benchmark commercial RuO2 nanoparticles. Furthermore, Co3O4-PNTs also exhibit excellent OER durability for least 10 h at the 10 mA cm−2. Overall, Co3O4-PNTs with low cost can be serve as a highly reactive and economical catalyst for OER.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Science of Advanced Materials
·
2015
·Vol. 7
·期 6
·1021-1027
·
IF 2.598
Yu Jin-Gang,Chen Na,Jiao Fei-Peng,Liu Qi,Jiang Xin-Yu,Jiang Jian-Hui,Chen Xiao-Qing
A novel and facile method for preparing iodinated carbon nanotubes, with iodine and hydrogen simultaneously covalently bound to the surface of nanotubes, has been developed. The functionalized carbon nanotubes were fully characterized using Fourier transform infrared spectroscopy, X-ray
photoelectron spectroscopy, Raman spectroscopy, energy-dispersive X-ray (EDX) spectroscopy and thermogravimetric analyses. This is the first report on the successful functionalization of single-walled carbon nanotubes using hydroiodic acid.
研究领域:
材料科学
·
化学
✓ 已验证
DOI
高影响因子
Membranes
·
2022
·Vol. 12
·期 10
·1011
·
IF 4.562
Zhen Wang,Xiaojuan Wang,Tao Zheng,Bing Mo,Huacheng Xu,Yijun Huang,Jian Wang,Congjie Gao,Xueli Gao
Nanofiltration (NF) membranes with a high permeability and rejection are of great interest in desalination, separation and purification. However, how to improve the permeation and separation performance still poses a great challenge in the preparation of NF membranes. Herein, the novel composite NF membrane was prepared through the interfacial polymerization of M-phenylenediamine (MPD) and trimesoyl chloride (TMC) on a double-walled carbon nanotube (DWCNT) interlayer supported by PES substrate. The DWCNT interlayer had a great impact on the polyamide layer formation. With the increase of the DWCNT dosage, the XPS results revealed an increase in the number of carboxyl groups, which decreased the crosslinking degree of the polyamide layer. Additionally, the AFM results showed that the surface roughness and specific surface area increased gradually. The water flux of the prepared membrane increased from 25.4 L/(m2·h) and 26.6 L/(m2·h) to 109 L/(m2·h) and 104.3 L/(m2·h) with 2000 ppm Na2SO4and NaCl solution, respectively, under 0.5 MPa. Meanwhile, the rejection of Na2SO4and NaCl decreased from 99.88% and 99.38% to 96.48% and 60.47%. The proposed method provides a novel insight into the rational design of the multifunctional interlayer, which shows great potential in the preparation of high-performance membranes.Keywords:interfacial polymerization;nanofiltration membranes;double-walled carbon nanotube;interlayer
研究领域:
材料科学
·
环境工程
✓ 已验证
DOI
PubMed
高影响因子
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