Journal of Energy Storage
·
2023
·
IF 9.4
Wenhao Fan,Jianxun Zhao,Dayong Liu,Qingcheng Liang,Wanqiang Liu,Xin Guo,Qingshuang Wang,Heng Liu,Peng Chen,Shang Gao,Yong Cheng,Xinwei Wang
The current hydrogen storage alloys used for Ni-MH battery negative electrode are difficult to guarantee excellent performance in terms of discharge capacity and cycle stability. Co 0.9 Cu 0.1 Si alloy has been widely investigated as a negative electrode material for nickel hydrogen battery, but its capacity and cycle stability need to be improved for commercial applications. In this work, Co 0.9 Cu 0.1 Si alloy was prepared by mechanical alloying. Molybdenum carbide (Mo 2 C) was loaded on multi-walled carbon nanotubes (MWCNTs) by in-situ carburizing . In order to improve the electrochemical hydrogen storage performance of Co 0.9 Cu 0.1 Si alloy, 5 wt% MWCNTs, Mo 2 C and molybdenum carbide modified multi-walled carbon nanotubes (Mo 2 C@MWCNTs) were added to Co 0.9 Cu 0.1 Si alloy via mechanical alloying method. The structure and morphology of the composites were characterized by XRD and SEM. The discharge capacity, cyclic stability and high rate discharge performance of the composites were tested, the electrochemical performance of the composites was investigated by three-electrode battery system. The composite materials have better discharge capacity, cycle stability and electrochemical performance compared with the pristine alloy. The Co 0.9 Cu 0.1 Si alloy doped with 5 wt% Mo 2 C@MWCNTs-2 has the best electrochemical hydrogen storage performance among all the composite materials. Its optimal discharge capacity is 609.9 mAh/g and its maximum capacity retention rate is 64.7 %. The enhancement of the electrochemical hydrogen storage performances of the composites are due to the high conductivity and high specific surface area of MWCNTs and the high catalytic activity of Mo 2 C. The synergistic effect of MWCNTs and Mo 2 C can improve the electrochemical hydrogen storage performances of the composites.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Jianfang Xia,Lei He,Zhilai Lu,Linpeng Liu,Jianan Song,Siyu Chen,Qingshan Wang,Farid A. Hammad,Yanling Tian
Flexible strain sensors have attracted significant attention in the wearable electronic device field, owing to their exceptional ductility, sensitivity, and durability compared to rigid strain sensors. However, the limited strain detection range or sensitivity has hindered their widespread application. In this study, a flexible strain sensor is fabricated by screen-printing a conductive carbon black ink layer on a conductive flexible composite layer made of thermoplastic polyurethane and multiwalled carbon nanotubes. Both kirigami-patterned and fingerprint-patterned structures are introduced to the architecture of sensors; while the former is designed for the improvement of strain sensing range, the latter serves for the enhancement of sensitivity and interfacial adhesion. It is demonstrated that the sensor achieves high sensitivity with a gauge factor of up to 5705.53 and has a wide strain sensing range from 0 to 150%. Besides, the sensor also shows good durability (6000 stretching–releasing cycles) and a fast response time of ∼220 ms. The excellent sensor performance of the flexible strain sensor suggests promising applications in human–computer interaction, medical health monitoring, and motion capture.
✓ 已验证
产品关联
DOI
高影响因子
TALANTA
·
2023
·
IF 6.1
Haotian Wu,Gang Zhang,Xiaozhan Yang
An electrochemical biosensor based on iron tetroxide (Fe 3 O 4 )/carboxylated carbon nanotubes (MWCNTs-COOH)/gold nanoparticles (AuNPs) was designed for the detection of alpha-fetoprotein (AFP), which is often used as an important indicator for the early clinical diagnosis of liver cancer markers. The Fe 3 O 4 /MWCNTs-COOH nanocomposite was synthesized by a solvothermal method and it combined with gold nanoparticles (AuNPs) deposited at the constant potential on a glassy carbon electrode to form Fe 3 O 4 /MWCNTs-COOH/AuNPs, which intensifies the electrical signal while the large active sites enable more stable immobilization of the AFP monoclonal antibodies on the electrode. The electrochemical performance of Fe 3 O 4 /MWCNTs-COOH/AuNPs was investigated in detail and the electrochemical response signal after the immune reaction with the AFP antigen-antibody was recorded. The peak current Ip of the response signal is linearly proportional to the lg c AFP in the range of 1 pg mL −1 –10 μg mL −1 , with a detection limit of 1.09034 pg mL −1 and good performance in clinical sample testing. The proposed sensor has shown great application and development potential in clinical medicine field.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Science & Engineering C-Materials for Biological Applications
·
2018
·
IF 5.08
Juan Zhang,Xiao-Tong Guo,Jun-Ping Zhou,Guang-Zhou Liu,Shu-Yong Zhang
A nanocomposite with multi-walled carbon nanotubes (MWCNTs) coated with surface molecularly imprinted polymers (MIPs) poly(3-aminophenylboronic acid) (PAPBA) was successfully prepared via potentiodynamic electropolymerization and tested as an effective electrochemical material for epinephrine (EP) detection. The morphology and properties of the sensing material were characterized with scanning electron microscopy and electrochemical impedance spectroscopy. Compared with MWCNTs or non-imprinted polymers PAPBA modified MWCNTs electrodes, the PAPBA(MIPs)/MWCNTs modified electrode showed a lower charge transfer resistance and enhanced electrochemical performance for EP detection. The improved performance can be attributed to the large amount of specific imprinted cavities with boric acid group which can selectively adsorb EP molecule and the synergistic effect between MWCNTs and PAPBA(MIPs). The effects of pH, the molar ratio between monomer and template molecule, the cycle number of electropolymerization, and the accumulation time of the modified electrode on the sensing performance were investigated. It was found that under the optimal conditions, the PAPBA(MIPs)/MWCNTs sensor could effectively recognize EP from many possible interferents of higher concentration within a wide linear range of 0.2–800 μmol·L −1 , with low detection limit of 35 nmol·L −1 , high sensitivity and good discrimination. The detection of EP in human serum and real injection samples using the PAPBA(MIPs)/MWCNTs sensor also gave satisfactory results.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2025
·
IF 9.8
Siwen Deng,Mingyao Dai,Bodu Fang,Yanqin Huang,Shulong Zeng,Zhunan Huang,Jiahui Xue,Xiaodong Li,Shaohong Shi,Fangchao Cheng
Creating novel, high-efficiency and multi-functional electromagnetic interference (EMI) shielding materials with high absorption attenuation is crucially important for integrated electronic devices. Herein, heterogeneous polyacrylonitrile (PAN)/graphene (Gr)@multi-walled carbon nanotubes (MWCNTs)/CoFe 2 O 4 multilayer films featuring electric-magnetic coupling were fabricated through a facile vacuum filtration method. The asymmetric layered architecture was composed of a flexible PAN electrospun nanofiber mat, an electrically conductive hybrid of Gr@MWCNTs, and a layer of insulating CoFe 2 O 4 particles. The nanosized magnetic CoFe 2 O 4 particles with unique magnetic hysteresis loss and natural resonance were synthesized by hydrothermal method and deposited on the conductive layer, to improve the impedance matching and reduce the electromagnetic wave (EMW) reflection. As a consequence, after incorporating the CoFe 2 O 4 layer, the EMW absorption loss (SE A ) was improved from 21.7 to 25.7 dB. Furthermore, the hybrid conductive network was regulated by altering the ratio of two-dimensional (2D) Gr to one-dimensional (1D) MWCNTs, to endow the well-designed multilayer films with a high EMI shielding effectiveness (SE) of 40.1 dB and a superior specific shielding effectiveness (SSE) of 326.3 dB/mm. By virtue of the fine-tuned Gr@MWCNTs conductive network, the PAN/Gr@MWCNTs/CoFe 2 O 4 multilayer films exhibited excellent Joule heating performance, with high sensitivity, low driving voltage, rapid response, superior cycling stability and long-term durability. The multilayer films could be controllably heated to 114.1 °C within 5 s under a low input voltage of 3.00 V. This work presents a viable strategy for exploiting functional materials that exhibit excellent EMI shielding and thermal management performance, suitable for applications in electronics operating at extremely low temperatures.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2024
·Vol. 171
·期 4
·047514
·
IF 3.1
Xuemei Ma,Wanyu Pang,Yali Gao,Xile Chang,Zhiyong Hu,Tuoping Hu
Rapid and accurate determination of rutin content in pharmaceuticals in an important issue. Here, a paper-based electrochemical sensor for in situ growth of chain ZIF-8 using multi-walled carbon nanotubes (MWCNTs) as a template was constructed by hydrothermal method. The results showed that the combination of ZIF-8 and MWCNTs not only promoted the dispersion of MWCNTs, but also made up for the conductivity of ZIF-8. Under optimum conditions, the Ipa was linearly related to the concentration of rutin in the range of 0.01–10 and 10–190 μM with a limit of detection (LOD) of 2.82 nM. Finally, the paper-based electrochemical sensor can be used for the electrochemical detection of rutin through the determination of rutin in pharmaceuticals.
✓ 已验证
产品关联
DOI
高影响因子
Advanced Materials Interfaces
·
2016
·Vol. 3
·期 15
·1600153
·
IF 3.365
Xinglong Pan,Qingzhong Xue,Jianqiang Zhang,Qikai Guo,Yakang Jin,Wenbo Lu,Xiaofang Li,Cuicui Ling
Multi-walled carbon nanotubes (MWCNTs)/hydrophilic poly(vinylpyrrolidone) (PVP) films are prepared by a simple spin-coating method and the resistive humidity sensing properties of the films are studied in detail. It is demonstrated that the thermally treated MWCNTs/PVP film exhibits a reproducible and great response over a wide relative humidity range from 11% to 94%, fast response time (less than 15 s) and ultrafast recovery time (less than 1.8 s), which are superior to that of pristine PVP films. The effective enhancement of humidity sensing characteristics of MWCNTs/PVP films can be explained by the MWCNTs/PVP interfacial effect. The thermally treated MWCNTs/PVP films can be used as robust, cost-effective, and easy-to-use resistive humidity sensors. And the design concept used in this work can be extended to other carbon composites to fabricate excellent sensing materials for sensors.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2016
·
IF 5.31
Xiaoling Zhang,Mingbao Feng,Ruijuan Qu,Hui Liu,Liansheng Wang,Zunyao Wang
Diethyl phthalate (DEP), a plasticizer widely used in chemical industry, has been classified as an endocrine disruptor. Therefore, it is urgent to develop methods for degradation of DEP to minimize its ecological risk. In this study, copper ferrite decorated multi-walled carbon nanotubes magnetic nanoparticles (CuFe 2 O 4 /MWCNTs MNPs) were prepared by sol–gel combustion method as catalysts for the degradation of DEP. The catalysts were characterized by scanning electron microscope, transmission electron microscope, Fourier transform infrared spectroscopy, nitrogen gas uptake, X-ray diffraction, and X-ray photoelectron spectroscopy. Catalytic degradation of DEP by persulfate (PS) was investigated with various influencing factors including catalyst loading, PS concentrations, temperature and pH. Furthermore, the CuFe 2 O 4 /MWCNTs MNPs showed high catalytic activity, stability and recyclability in DEP removal. Especially, leaching of metal ions from reused CuFe 2 O 4 /MWCNTs was negligible (concentration < 0.4%), indicating the resistance to oxidation. The electron paramagnetic resonance analysis confirmed that the addition of CuFe 2 O 4 /MWCNTs into PS system can accelerate the generation of OH and SO 4 − , and the quenching experiments further certified the catalytic reaction was predominated by SO 4 − . The degradation intermediates were identified and the pathways were proposed. Overall, this study provides practical knowledge for DEP removal by CuFe 2 O 4 /MWCNTs activated PS at ambient temperature.
✓ 已验证
产品关联
DOI
高影响因子
Scientific Reports
·
2017
·Vol. 7
·期 1
·1-9
·
IF 4.259
He Xiulin,Hou Huijie,Yuan Xiqing,Huang Long,Hu Jingping,Liu Bingchuan,Xu Jingyi,Xie Jia,Yang Jiakuan,Liang Sha,Wu Xu
Lithium-sulfur batteries have attracted great attention because of their high energy density, environmental friendliness, natural abundance and intrinsically low cost of sulfur. However, their commercial applications are greatly hindered by rapid capacity decay due to poor conductivity of electrode, fast dissolution of the intermediate polysulfides into the electrolyte, and the volume expansion of sulfur. Herein, we report a novel composite MWCNTs@TiO 2 -S nanostructure by grafting TiO 2 onto the surface of MWCNTs, followed by incorporating sulfur into the composite. The inner MWCNTs improved the mechanical strength and conductivity of the electrode and the outer TiO 2 provided the adsorption sites to immobilize polysulfides due to bonding interaction between TiO 2 and polysulfides. The MWCNTs@TiO 2 -S composite with a mass ratio of 50% (MWCNTs in MWCNTs@TiO 2 ) exhibited the highest electrochemistry performance among all compositing ratios of MWCNTs/TiO 2 . The performance improvement might be attributed to the downward shift of the apparent Fermi level to a more positive potential and electron rich space region at the interface of MWCNTs-TiO 2 that facilitates the reduction of lithium polysulfide at a higher potential. Such a novel hybrid structure can be applicable for electrode design in other energy storage applications.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2015
·
IF 6.409
Wenjuan Guo,Na Sun,Xiaoli Qin,Meishan Pei,Luyan Wang
A novel aptasensor based on a novel composite film consisting of multi-walled carbon nanotubes (MWCNTs), ionic liquid (IL) of 1-hexyl-3-methylimidazolium hexafluorophosphate (HMIMPF 6 ), and nanoporous PtTi (NP-PtTi) alloy was constructed for ultrasensitive detection of kanamycin . The NP-PtTi alloy was successfully fabricated by a simple dealloying of PtTiAl source alloy in HCl solution. The NP-PtTi alloy has uniform interconnected network structure with specific surface area and was used to immobilize aptamer. After modified with the composite material, current signal was amplified obviously, which attributed to the larger specific surface area and excellent electrical conductivity of NP-PtTi and MWCNTs. A number of factors affecting the activity of the aptasensor have been discussed and optimized. Under the optimized conditions, the proposed aptasensor provided a linear range of 0.05–100 ng mL −1 with a low detection limit of 3.7 pg mL −1 . This aptasensor displayed high sensitivity, stability and reproducibility. In addition, the as-prepared aptasensor was successfully used for the determination of kanamycin in a real sample.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2014
·
IF 4.058
Lixin Zhou,Shengdong Pan,Xiaohong Chen,Yonggang Zhao,Baobo Zou,Micong Jin
A novel core–shell covalently functionalized Fe 3 O 4 coated SiO 2 decorated multi-walled carbon nanotubes (Fe 3 O 4 @SiO 2 –MWCNTs) adsorbent was synthesized and characterized by scanning electron microscopy, transmission electron microscopy, Fourier Transform Infrared Spectrum (FTIR), Thermogravimetry, X-ray diffraction and magnetic measurements. The pentachlorophenol (PCP) adsorption effect factors of initial concentration, contact time, solution pH and temperature were investigated in detail. It was found the absorption capacity was strongly depended on pH, and the maximum adsorption value for PCP (96.4 mg/g) was obtained at pH 2.5. The equilibrium was attained within 30 min, and the adsorption kinetics was better described by pseudo-second-order kinetic model. The data pointed out excellent fit to Freundlich isotherm model. Thermodynamic parameters such as standard enthalpy (Δ H θ ), standard entropy (Δ S θ ) and standard free energy (Δ G θ ) showed that the adsorption of PCP onto Fe 3 O 4 @SiO 2 –MWCNTs was spontaneous, endothermic and random within the temperature range of 288–318 K. The results indicate that the Fe 3 O 4 @SiO 2 –MWCNTs adsorbent is a potential low-cost effective material for PCP removal from contaminated wastewater.
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS A-PHYSICAL
·
2024
·
IF 4.1
Ding Zhang,Renkun Zhang,Jiatai Sun,Jingxiang Zhang,Qiuying Zhao,Haiyan He,Huajie Huang,Lu Yang,Yuanping Xu
Recently, flexible pressure sensors rooting in piezoresistive mechanism have gained immense popularity due to their excellent application potential in the fields of software robotics, electronic skins and human health monitoring, etc. However, the trade-off between sensitivity and pressure range still remains challenging for the wide application of piezoresistive sensors . Herein, a novel flexible pressure sensor constructing from electrospun ionic liquids/Multi-walled carbon nanotubes/poly(vinylidene fluoride) (ILs/MWCNTs/PVDF) ternary composite that permits high-sensitivity detection over broad pressure range is implemented. Benefitting from the filamentous porous network coupled with urchin-shaped beads, the newly developed active ternary composite showed excellent compressibility and high sensitivity to pressure, endowing the resultant piezoresistive sensor with broad-pressure detection ranging from 1.0 Pa to 307 kPa with a maximum sensitivity of 0.075 kPa −1 . Simultaneously, the proposed sensor present fast response/recovery time of 120/80 ms and high operation stability over 14000 cyclic pressings. Also, the feasibility of sensor in effectively monitoring various physiological signals, recognizing keyboards and expressing spatial pressure distribution is demonstrated, implying their great potential as viable high-performance pressure sensor.
✓ 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）