Small
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2024
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IF 13
Jia Chen,Maoheng Fei,Meijun Ni,Yilin Wang,Zhifang Liu,Yixi Xie,Pengcheng Zhao,Zhiyong Zhang,Junjie Fei
In this work, multi-layer Ti 3 C 2 – carbon nanotubes – gold nanoparticles (Ti 3 C 2 -CNTs-Au) and cyclodextrin metal-organic framework – carbon nanotubes (CD-MOF-CNTs) have been prepared by in situ growth method and used to construct the ultra-sensitive rutin electrochemical sensor for the first time. Among them, the large number of metal active sites of Ti 3 C 2 , the high electron transfer efficiency of CNTS, and the good catalytic properties of AuNPs significantly enhance the electrochemical properties of the composite carbon nanomaterials. Interestingly, CD-MOF has a unique host–guest recognition and a large number of cavities, molecular gaps, and surface reactive groups, which gives the composite outstanding accumulation properties and selectivity for rutin. Under the optimized conditions, the constructed novel sensor has satisfactory detection performance for rutin in the range of 2 × 10 −9 to 8 × 10 −7 M with a limit of detection of 6.5 × 10 −10 M. In addition, the sensor exhibits amazing anti-interference performance against rutin in some flavonoid compounds and can be used to test natural plant samples (buckwheat, Cymbopogon distans , and flos sophorae immaturus). This work has promising applications in the field of environmental and food analysis, and exploring new directions for the application of Mxene-based composites.
研究领域:
材料科学
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分析化学
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纳米技术
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环境科学
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食品分析
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DOI
PubMed
高影响因子
MICROCHIMICA ACTA
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2024
·Vol. 191
·期 9
·1-10
·
IF 5.3
Zhao Fan,Liu Yunxi,Lan Jingyue
A simple and efficient dual-signal electrochemical sensor was designed for glyphosate (GLYP) determination based on the one-step electro-synthesized Cu-Hemin MOFs/CNTs nanocrystals. Cu-Hemin MOFs/CNTs were directly modified on the electrode through electrodeposition, avoiding complicated synthesis and modification processes. The incorporation of CNTs greatly boosted the conductivity of Cu-Hemin MOFs and the sensitivity of the electrochemical sensor. Cu active sites in Cu-Hemin MOFs were converted to CuCl, allowing the specific detection of GLYP with the turn of CuCl into non-electroactive Cu-GLYP. Meanwhile, GLYP showed highly effective inhibition effect on the inherent peroxidase-like activity of Cu-Hemin MOFs, therefore generating the second electrochemical signal with Cu-Hemin MOFs-catalyzed o -phenylenediamine ( o -PD) + H 2 O 2 system. The Cu-Hemin MOFs/CNTs based sensor with two electrochemical signals showed good linearities of 1.0 × 10 −10 M − 3.0 × 10 −6 M and 1.0 × 10 −10 M − 5.0 × 10 −5 M, with detection limits of 5.17 × 10 −12 M and 6.81 × 10 −12 M for the CuCl signal based assay and nanozyme catalyzed o -PD + H 2 O 2 procedure, respectively. This simple and robust dual-signal sensor with excellent selectivity, accuracy, and stability allowed GLYP quantification in real samples, highlighting the potential application of this approach for food and environmental monitoring. Graphical Abstract
研究领域:
分析化学
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环境科学
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食品科学
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DOI
PubMed
高影响因子
Advanced Materials Interfaces
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2021
·Vol. 8
·期 6
·2001910
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IF 6.147
Xu Li,Bin Wu,Ya Li,Md Mofasserul Alam,Peng Chen,Ru Xia,Cheng-Te Lin,Jiasheng Qian
The development of thermal conduction polymer-based composites is important to solve the heat dissipation of electronic instruments under overheating conditions. The construction of thermal conductive pathways in composites and the reduction of contact resistance between fillers are crucial for concerning excellent thermal conduction properties. Herein, the oriented coherent thermal conductive network in composites is successfully developed via the in situ growth of carbon nanotubes (CNTs) into boron nitride nanosheets (BNNSs) skeleton prepared from ice-templated. The thermal conductivity of composites reaches 3.21 W m −1 K −1 approximately low filler loading of 9.86 vol%, due to the formation of the covalent bonding between CNTs and BNNSs as reducing the thermal contact resistance by one order of magnitude. More importantly, non-equilibrium molecular dynamics (NEMD) simulations are carried out to demonstrate the influence of CNTs in elevating the heat conductivity between BNNSs. Meanwhile, the volume resistivity of composites up to 10 15 Ω cm far met the requirement of electrical insulation. This study provided a valuable idea for the design of thermal management materials for potential applications in integrated circuits.
研究领域:
材料科学
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热管理技术
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DOI
高影响因子
ACS Sustainable Chemistry & Engineering
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2020
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IF 7.632
Xiujing Lin,Tingting Zhang,Chengcheng Chu,Zhuang Li,Ruiqing Liu,Pan Li,Yi Li,Zhendong Huang,Yanwen Ma
Lithium–oxygen (Li–O2) batteries, profiting by their super high theoretical energy density and oxygen-breathing electrodes, have attracted extensive concern. The synthesis of the electrode materials with high conductivity and promising cycling durability will be a critical aspect for Li–O2 batteries. In this article, a hybrid composite of CoS2 nanocages derived from ZIF-67 and interconnected by carbon nanotubes (CoS2/CNTs) is prepared and used in the air electrode fabrication for Li–O2 batteries. A reversible capacity of 2398.9 mAh g–1 is obtained, equivalent to 90% of the discharge capacity. When restricting the cycling capacity to 500 mAh g–1, the battery exhibits cycling stability for 52 cycles, with the cutoff potential keeping above 2.0 V. The key point of this material is the formation of porous CoS2 nanocages and insertion of the nanocages with CNTs, forming interconnected electrically conducting networks. The incorporation of CNTs serves as channels for fast electron transfer, which overcomes the poor conductivity of CoS2. Furthermore, the porous CoS2 nanocages could provide affluent active sites for an oxygen reduction reaction (ORR) and oxygen evolution reaction (OER), which also facilitates the diffusion of O2 and the infiltration of electrolytes. The combination of highly conductive CNTs and CoS2 with efficient catalytic activity renders improvement in the battery performance.
研究领域:
材料科学
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储能
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电化学
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纳米材料
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电池技术
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2026
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IF 5.4
Zhiping Su,Pu Wang,Caiyun Wang,Zuli Zheng,Haiyan Xu,Liping Ning
A sandwich-structured CNFs-CNTs/Ni:Co NWs composite film was prepared. • CNFs-CNTs/Ni:Co NWs film showed a high tensile strength of 45.9 MPa. • CNFs-CNTs/Ni:Co NWs film showed an EMI shielding effectiveness of 48.6 dB. • CNFs-CNTs/Ni:Co NWs film exhibited a thermal conductivity of 2.003 W·m⁻¹ ·K⁻¹ . With the increasingly serious electromagnetic pollution, the development of high-performance electromagnetic interference (EMI) shielding materials has become an urgent demand. Herein, a sandwich-structured cellulose nanofibrils (CNFs)-carbon nanotubes (CNTs)/nickel-cobalt alloy nanowires (Ni:Co NWs) composite film (CNFs-CNTs/Ni:Co NWs) was developed via a vacuum-filtration layer-by-layer assembly strategy. The core layer (CNFs-CNTs) endowed CNFs-CNTs/Ni:Co NWs with good flexibility, high strength, and electrical conductivity. The two outer layers (Ni:Co NWs) further improved the electrical conductivity of CNFs-CNTs/Ni:Co NWs and enabled the magnetic conductivity of CNFs-CNTs/Ni:Co NWs. This unique sandwich structure made the resulting CNFs-CNTs (40%)/Ni:Co NWs a high EMI shielding effectiveness (EMI SE) of 48.6 dB. The EMI absorption effectiveness (SE A ), EMI reflection effectiveness (SE R ), and green shielding index of CNFs-CNTs (40%)/Ni:Co NWs were 34.1 dB, 15.2 dB, and 2.3, respectively. The CNFs-CNTs (40%)/Ni:Co NWs also showed high strength (45.9 MPa) and good bending capability. Moreover, such CNFs-CNTs (40%)/Ni:Co NWs exhibited excellently thermal conductivity (2.003 W·m⁻¹·K⁻¹). This CNFs-CNTs (40%)/Ni:Co NWs represents a promising high-performance EMI shielding material. Download: Download high-res image (188KB) Download: Download full-size image
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DOI
高影响因子
Science China-Technological Sciences
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2024
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IF 4.4
Li Tao,Dai GeLiang,Liu SiYu,Zhang JingYu,Sun AoKui
Owing to severe agglomeration of manganese carbonate (MnCO 3 ) during its synthesis, it exhibits rapid decay cycle performance when used as a cathode material in aqueous zinc ion batteries. To overcome this drawback, we synthesized a MnCO 3 material with carbon nanotubes (CNTs) (i.e., MnCO 3 @CNTs) via a one-step solvothermal method using a hybrid modification strategy. MnCO 3 nanospheres were grown in-situ on a two-dimensional (2D) plane that was orderly interwoven by tubular single fibers of carbon to form a leaf-like nanosheet structure. The surface area of the MnCO 3 @CNTs material was enlarged enormously through the special nanosheet structure, and its stability was improved by the supporting structure of the CNTs. As a result, the MnCO 3 @CNTs exhibited a discharge capacity of 247.6 mAhg −1 at a current density of 0.1 A g −1 . The energy storage mechanism of MnCO 3 @CNTs was further explored using a series of electrochemical kinetic analyses and ex-situ characterization tests. This modification method not only broadens the application field of MnCO 3 , but also provides the possibility of modifying more cathode materials.
研究领域:
材料科学
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电化学
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DOI
高影响因子
ELECTROANALYSIS
·
2018
·Vol. 30
·期 9
·2035-2043
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IF 2.851
Shuangyan Liu,Lei Wang,Guoyi Duan,Linan Wang,Zia Ul Haq Khan,Yanzhi Sun,Yongmei Chen,Pingyu Wan
To improve the performance of dopamine (DA) detection in the presence of ascorbic acid (AA) and uric acid (UA), sodium diphenylamine sulfonate/polypyrrole/multi-walled carbon nanotubes (SDPAS/PPy/CNTs) film was fabricated on the surface of gold electrode through one-pot polymerization initiated by electrochemical oxidation. SDPAS were covalently embedded into the backbone of PPy to endow the resultant film with numerous negative-charged terminals, resulting in selective pre-adsorption of protonated DA + on the electrode and switching the following anodic reaction to be an adsorption-controlled process. The detection of DA in the presence of AA and UA by square wave voltammetry method showed an outstanding repeatability with the relative standard deviation of 0.45 %. A good linear relationship was observed between the oxidative peak current and the concentration of DA in the range of 0.827–104 μM (R 2 =0.993), and the limit of detection (LOD) was calculated to be 0.105 μM (S/N=3).
研究领域:
生物医学工程
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分析化学
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DOI
高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
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2020
·Vol. 22
·期 1
·1-12
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IF 2.132
Hou Junjie,Zhou Xuemei,Yang Zhi,Nie Huagui
Oxygen evolution reaction (OER) catalysts are of central importance for electrocatalytic water oxidation and fuel generation, while it is still an urgent requirement to design and develop efficient OER catalysts with rapid kinetics and low overpotentials. Herein, we report an electrochemical deposition method to fabricate carbon nanotubes/N-doped cuprous sulfide (CNTs/N-Cu 2 S) composites using thiourea and a CuSO 4 solution as the S and Cu sources, respectively. The advantages of this strategy include low cost, simple processing and the absence of templates or surfactants that can otherwise affect the electrochemical properties of the products. The N supplied by the thiourea can be used as a doping agent as a result of the in situ formation of small N-Cu 2 S particles, which can increase larger surface area and create more active sites to enhance OER catalytic activity, compared with that obtained with materials synthesized without adding the thiourea. The synergic interface of CNTs and N-Cu 2 S can improve conductivity and efficient chemical transfer in the composites electrodes by introducing CNTs. Under the optimal experimental conditions, the CNTs/N-Cu 2 S-5cyc composites present an excellent activity with the current density of 10 mA cm −2 at a low OER overpotential of 280 mV, the Tafel slope of 63 mV dec −1 and a strong electrochemical stability in 1.0 M KOH solution.
Graphical abstract
研究领域:
材料科学
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电化学
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催化
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DOI
高影响因子
RSC Advances
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2023
·Vol. 13
·期 49
·34808-34816
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IF 3.9
Zishan Hu,Yuanlin Li,Aijun Li,Hai-Hua Wang,Xiao-Feng Wang
Establishing stable and efficient Pt-free counter electrodes (CEs) is an important challenge for dye-sensitized solar cells (DSSCs). Ti3C2Tx MXene, with its high catalytic activity and conductivity, has gained attention as a CE in DSSCs. The focus of this paper is on the preparation of Ti3C2Tx decorated carbon nanotubes (CNTs) composite electrode materials (CNTs/Ti3C2Tx), and testing their performance as CEs in DSSCs. Through a series of electrochemical tests, a CNTs/Ti3C2Tx CE exhibits good electrocatalytic activity toward iodine-based electrolytes with low charge transfer resistance, which is close to the performance of a Pt CE. The photoelectric conversion efficiency (PCE) of the CNTs/Ti3C2Tx (1.0 wt%) CE-based DSSCs reaches 5.83%, which is much higher than that of the CNTs CE (3.70%), and approximates that of the Pt CE (6.61%). We attribute the improved performance to the synergistic effect of the excellent conductivity and unique two-dimensional chemical structure of Ti3C2Tx MXene. Moreover, the photostability test of continuous light exposure shows that the CNTs/Ti3C2Tx-1.0 wt% (C/T-1.0 wt%) CE exhibits good stability to the electrolyte. Therefore, CNTs/Ti3C2Tx composites can be used as an efficient Pt-free CE for DSSCs in the future.
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PubMed
高影响因子
Lubricants
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2023
·Vol. 11
·期 12
·511
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IF 3.5
Jiju Guan,Zhengya Xu,Lei Zheng,Lanyu Yang,Shuiquan Huang
Polyether-ether-ketone (PEEK) exhibits great potential in being a replacement for metal components across various applications relying on the mechanical and tribological properties. However, there is still much to be done to improve its properties. The main motivation of this paper is to improve the tribological and mechanical properties of PEEK simultaneously for more severe working environment. Therefore, dialkyl pentasulfide (RC2540) was proposed to fill into the cavity of CNTs to prepare nano-capsules, which were then filled into PEEK to prepare PEEK/nano-capsules composites. The existence of nano-capsules in PEEK was analyzed, and the friction and wear properties exhibited by PEEK composites against GCr15 steel were examined using pin-disk friction pairs, and the self-lubricating mechanism of PEEK composites in friction was revealed. Findings of this study indicated that when the mass fraction of nano-capsules was less than 5%, the filling of nano-capsules could improve the tensile strength of PEEK and reduced the friction coefficient and specific wear rate of PEEK by filling nano-capsules. During the friction process, RC2540 in the nano-capsules can be released as PEEK wears so that a self-lubricating layer can be formed for reducing PEEK composites’ friction and wear.
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高影响因子
Catalysts
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2023
·Vol. 13
·期 12
·1459
·
IF 3.9
Ou Sha,Xifeng Lu,Pei Su
The electrochemical advanced oxidation process is a promising technology for tackling wastewater pollution, but it suffers from poor pH adaptability and slow catalytic kinetics in a neutral and alkaline environment in a homogeneous system, as well as fast release of metal ions in a heterogeneous system. Herein, a boron- and nitrogen-codoped carbon nanotube-encapsulated transition metal (M@BN-C, M–Co, Cu) cathode with a similar structure was synthesized to explore activity trends and mechanisms. Characteristics of Co@BN-C and Cu@BN-C cathodes were examined and compared with the previously synthesized Fe@BN-C bifunctional cathode. The activity of sulfamethazine (SMT) degradation by the Co@BN-C cathode was higher than both Fe@BN-C and Cu@BN-C at pH = 3 and pH = 7, respectively. However, the activity of Co@BN-C was also higher than that of Cu@BN-C and lower than that of Fe@BN-C at pH = 9. It was observed that•OH and1O2were the main reactive oxygen species (ROS) using Co@BN-C and Cu@BN-C cathodes. The Co@BN-C generated the highest•OH for efficient SMT degradation through abundant H2O2generation, exhibiting the highest catalytic activity compared with the Cu@BN-C cathode. Overall, SMT degradation on the Co@BN-C cathode demonstrated better catalytic performance in real wastewater. This study provided insights into the fundamental catalytic trends and mechanisms of ROS production via the M@BN-C cathode, thus contributing to the development of the M@BN-C cathode for catalytic organic pollutant degradation.Keywords:electrocatalysis;water treatment;bifunctional cathode;reactive oxygen species;mechanism
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Jiangshan Gao,Yide Hao,Shuyan Lin,Ziming Zhang,Huifang Li,Yan He
The microstructure of carbon nanotubes (CNTs) plays a pivotal role in determining their performance as electrode materials. Herein, CNTs encapsulating NiSe 2 /CoSe 2 nanoparticles (CNT@NiCo-Se) are derived from Ni-Co Prussian blue analogue (Ni-Co PBA), and the CNTs possess smaller diameter and larger interlayer spacing due to the “etching and isolation technique” that is adopted to prevent the accumulation of Ni/Co in Ni-Co PBA during the calcination process. CNT@NiCo-Se exhibits a specific capacity of 105.1 mAh g −1 at a current density of 1 A g −1 , which is 375 % higher than that obtained without isolation strategy, which resulted in the microstructure advantages of smaller diameter and larger interlayer spacing. The actual reason is that smaller diameter and larger interlayer spacing correspond to higher charge transfer density and increased the –OH binding energy (OHBE) according to density functional theory (DFT) calculation results. In addition, the assembled asymmetric supercapacitor (ASC) device exhibits a high energy density of 46.3 Wh kg −1 at 801 W kg −1 and a high power density of 8000 W kg −1 at an energy density of 12.0 Wh kg −1 , and the initial specific capacitance of 80.4 % can be maintained after 10,000 cycles at 10 A g −1 . More importantly, this work provides a novel strategy for microstructure adjustment of CNTs in the field of energy storage and conversion.
研究领域:
材料科学
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能源存储与转换
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DOI
高影响因子
危险品化学品经营许可证（带存储）