CHEMICAL ENGINEERING SCIENCE
·
2024
·
IF 4.1
Junhao Li,Jiajie Pan,Qilan Chen,Guizheng Liu,Tong Li,Lingcai Zeng,Kai Wan,Quanbing Liu,Zhenxing Liang
It is extremely desirable to develop efficient sulfur reduction reaction (SRR) electrocatalysts for lithium-sulfur (Li–S) batteries. In this work, a small intestinal structure sulfur electrocatalyst, viz. Ni 2 P-CNTs@NHCF nanoreactor, is designed by a facile coaxial electrostatic spinning strategy. Experimental results and theoretical calculations indicate that the synergetic effect of Ni–S and Li–P dual chemical bonds between Ni 2 P and lithium polysulfides (LiPSs) optimizes the chemisorption energy of LiPSs and reduces reaction energy barriers from liquid LiPSs to solid Li 2 S, thus achieving the successive immobilization-diffusion-conversion process of sulfur species. As a result, the cell modified with Ni 2 P-CNTs@NHCF catalyst exhibits the excellent reversible capacities and cyclic stability. With the high sulfur loading of 8.13 mg cm −2 and low electrolyte/sulfur ratio of 6 μL mg −1 , it displays a significant initial areal capacity of 13.4 mAh cm −2 and remains 7.1 mAh cm −2 after 80 cycles at 0.1 C. This work offers an effective strategy on rational design of efficient electrocatalysts, and provides considerable insights into the mechanical comprehension of SRR.
研究领域:
材料科学
·
电化学
·
能源存储
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DOI
高影响因子
FULLERENES NANOTUBES AND CARBON NANOSTRUCTURES
·
2020
·
IF 1.648
Linghan Kong,Tingting Yu,Jianbo Zhan,Ying Zhang,Geng Li,Hao Wang,Xu Wang,Liang Cheng,Fanghui Wang
Ru-Co/CNTs catalysts are prepared by microwave-assisted heating electroless plating using Carbon nanotubes as Carrier. The structure of the catalyst was analyzed by TEM, XRD, EDS and TGA, and the performance of the catalytic alcoholysis of sodium borohydride was tested. At 25 oC, the carbon nanotube diameter is 10-20 nm, the catalyst dosage is 20 mg, the sodium borohydride concentration is 5 wt.%, and the sodium hydroxide concentration is 7 wt.%, the maximum rate of catalytic hydrogen production reaches the maximum value. At the same time, the activation energy is calculated to be 34.35 kJ · mol-1, which is much lower than the activation energy of spontaneous alcoholysis of sodium borohydride (63.0 kJ/mol).
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2021
·Vol. 139
·期 14
·51906
·
IF 3.125
Bin Du,Daodao Xue,Rubai Luo,Kenan Yang,Huailin Li,Shisheng Zhou
Epoxy resin is one of the most important matrix materials in the field of high performance composites. Its mechanical strength, toughness, and thermal stability are very important to the properties of composites. In this paper, the improvement of epoxy resin properties by carbon nanotubes (CNTs) is mainly studied. First, aniline trimer (AT) and polyethylene glycol octyl phenyl ether (Triton X-100) are combined to modify CNTs. Then the dispersed CNTs (treated-CNTs) are used to prepare bisphenol F epoxy nanocomposites. The dispersion of CNTs and fracture surface of composites are analyzed by SEM and TEM. The combination of AT and Triton X-100 with CNTs is analyzed by UV–vis and FTIR. The mechanical, thermodynamic, tribological properties, and crosslinking density changes of epoxy composites are evaluated. The results show that AT and Triton X-100 are successfully bonded to the surface of CNTs. The dispersion effect of treated-CNTs in the composites is better than that of the original CNTs, which have a better reinforcing and toughening effect on the composites. The introduction of treated-CNT reduces the crosslinking density and glass transition temperature of the composites, but does not affect the thermal stability of the composites before 300°C.
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高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2014
·
IF 2.129
Yuping Wu,Zhonghua Zhou,Yongfeng Tuo,Kai Wang,Min Huang,Yue Huang,Shirley Shen
A transparent film of carbon nano-tubes and TiO 2 composite (CNTs/TiO 2 ) with superhydrophobic and photocatalytic functions has been successfully fabricated on a glass substrate via a simple chemical liquid phase deposition method with adding CNTs dispersion liquid. The transmittance of CNTs/TiO 2 film deposited 16 h on glass substrate is 79% at the wavelength of 550 nm. After surface modified by fluorosilane, the contact angle reaches 160 ± 3° and sliding angle is less than 2°. The photocatalytic activity is much higher than that of a pure TiO 2 film as probe tested by UV degradation of methylene blue. Characterized by SEM, TEM, FTIR, AFM and UV–Vis, results show that i) the film has a structure of well-dispersed TiO 2 nanoparticles loaded oriented on CNTs with high surface roughness; ii) the formation of Ti–O–C chemical bonding; iii) Ti–O–C chemical bonding acts as a bridge and promotes mutual depositions of CNTs and TiO 2 , finally constructs hierarchical roughness with special micro- and nano-structures. The formation mechanism of self-assemble during the liquid phase deposition may also be extended to preparation of other CNTs/oxide composite function films.
研究领域:
材料科学
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纳米科技
·
表面工程
·
光催化
·
功能薄膜
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DOI
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2026
·
IF 7.1
Le Fu,Tian-Nan Man,Teng Liu,Sergey Victorovich Panin,Zhi-Sheng Nong
This study developed a novel carbon-based nanofiller CNTs-DA via a bridging method, which was then combined with thermally insulating filler silica aerogel (SA) and epoxy resin (EP) binder to fabricate a multifunctional coating with both thermal insulation and flame-retardant properties. The results show that with the addition of CNTs-DA, the flame-retardant efficiency of the coating first increases and then decreases. When the loading of CNTs-DA is 5 wt%, a uniform three-dimensional network structure of SA and CNTs-DA forms in the coating. Compared with the sample without CNTs-DA, the peak heat release rate (pHRR) and total heat release (THR) are reduced by 36.69% and 26.48%, respectively. The EP coating with the highest thermal insulation performance is the sample containing 5 wt% CNTs-DA at 200°C, which exhibits an insulation temperature of 64.8°C. In comparison, the EP coating with only SA shows an insulation temperature of 59.6°C. The synergistic interaction between SA and CNTs-DA results in the thermal insulation performance of the composite coatings. The CNTs-DA contribute to thermal insulation by effectively extending the pathway for heat conduction. This work demonstrates that uniformly dispersed SA and CNTs-DA can synergistically endow the EP coating with excellent thermal insulation and flame-retardant performance.
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Mengxuan Zhang,Lu Zhao,Dong Sun,Yankun Sun,Chunming Xu,Shichao Lu,Tao Li,Yongfeng Li,Zhihua Xiao
The poor electronical conductivity and large volume change of nano-silicon anode has seriously hindered its further application. To overcome these drawbacks, we employed the S-doped multiwalled carbon nanotubes (SCNTs) as the conductive additive to fabricating a scaffolded framework for the first time. The as-assembled Si anode with 5 wt% SCNTs (Si@C-5SCNTs) shows a large specific capacity of 939 mA h g −1 at 2 A g −1 within 0–1 V, significantly higher than that of Si@C (466 mA h g −1 ) and Si@C-5CNTs (720 mA h g −1 ), showing a superior rate performance. Besides, it shows higher initial coulombic efficiency, Li-ion diffusion coefficient, cycling performance, and smaller volume change than that of Si@C and Si@C-CNTs at room temperature. Even at 40 ℃, the Si@C-5SCNTs anode still show a superior rate performance (1842 and 819 mAh g −1 at 0.05 and 2 A g −1 , respectively) and cycling stability (83.6% capacity retention) than that of Si@C and Si@C-5CNTs. To better explain the significantly enhanced electrochemical performance of Si anode both room and high temperature conditions, both the chemo-mechanical coupling and internal temperature distribution models have been rational constructed, and further demonstrated that the SCNTs can effectively buffer the volume expansion and reduce the internal local temperature rise.
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源存储
·
先进电池技术
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DOI
高影响因子
SOLID STATE IONICS
·
2024
·
IF 3
Shengping Deng,Chongran Song,Shiyu Li,Ying Bai
NASICON-type Na 4 MnCr(PO 4 ) 3 (NMCP) has gained significant attention due to its prominent capacity and voltage platform. However, poor intrinsic electron conductivity severely obstructed its wider application. Here, the NMCP was decorated through structurally integrated with the high conductive carbon nanotubes (CNTs) component via the sol-gel method. The CNTs additive was tightly implanted NMCP bulk, providing fast electron transfer rates, further reduced charge transfer resistance and ohmic resistance , and improving the electrochemical properties of NMCP during the reversible intercalation/deintercalation of Na + . Finally, the as-prepared rambutan-like NMCP/C@CNTs could release a high reversible capability of 118.7 mAh g −1 at 0.1C and exhibit long durability over 500 cycles at a high rate of 10C. The pseudocapacitance contributions were investigated, and the Na storage mechanism was also demonstrated through in-situ synchrotron X-ray diffraction. The assembled NMCP/C@CNTs//HC full cell could deliver a high energy density of 364.4 Wh kg −1 . The encouraging electrochemical performance of the full cell will promote the development of sodium ion secondary batteries for large-scale applications in the future.
研究领域:
材料科学
·
电化学
·
储能
·
纳米材料
·
电池技术
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DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2023
·
IF 8.7
Bing Liu,Quan Liu,Yucheng Pan,Jianyu Zhou,Junshuo Zhang,Shuai Liu,Ziyang Fan,Huaxia Deng,Yuan Hu,Xinglong Gong
An intelligent material with shear thickening, flame-retardant and sensing properties was prepared by introducing mesoporous silica and carbon nanotubes to ionic liquids. By impregnating the conductive shear thickening fluid (STF) on Kevlar fabric and drying in an oven, CNTs/STF/Kevlar composite was obtained. Due to the rate-sensitive performance of STF, the yarn pull-out force of CNTs/STF/Kevlar increased 3–4 times compared with that of neat Kevlar, once the impregnation weight gain is 55 wt%. Furthermore, the CNTs/STF/Kevlar composite can maintain intact at 110 m/s incident velocity of bullet, whereas neat Kevlar fabric was penetrated at the same velocity, and exhibited the flame resistance as well due to the thermal insulation property of mesoporous silica and flame-retardant performance of ionic liquids. Then, CNTs/STF/Kevlar composite also performed obvious sensing characteristic due to the introducing of carbon nanotubes, and showed the application potential in the field of safe wearable equipment.
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DOI
高影响因子
RSC Advances
·
2023
·Vol. 13
·期 6
·3835-3842
·
IF 3.9
Tanlun Wang,Lincheng Xu,Chenxiang Sun,Xiyuan Li,Yong Yan,Fan Li
Fe–N–C has a high number of FeNx active sites and has thus been regarded as a high-performance oxygen reduction reaction (ORR) catalyst, and combining Fe3C with Fe–N–C typically boosts ORR activity. However, the catalytic mechanism remains unknown, limiting further research and development. In this study, a precipitation-solvothermal process was used in conjunction with pyrolysis to produce a series of Fe–N–C catalysts derived from a zeolitic imidazolate framework (ZIF) that was composited with Fe3C. The prepared catalysts had a multiscale structure of ZIF-like carbon particles and rod-like structures, as well as bamboo-like carbon nanotubes (CNTs) and carbon layers wrapped with Fe3C particles while a series of studies revealed the origin of the rod-like structures and Fe3C phase. The hierarchical structure was beneficial to the enhanced electrocatalytic performance of catalysts for ORR. The optimal sample had the highest half-wave potential of 0.878 V vs. RHE, which was higher than that of commercial Pt/C (0.861 V vs. RHE). The ECSA of the optimal sample was 1.08 cm2 μg−1, with an electron transfer number close to 4, and functioning kinetics. The optimal sample exhibited high durability and methanol tolerance for the ORR. Finally, blocking different Fe active sites with coordination ions demonstrated that Fe(II) was the main active site, indicating that Fe3C primarily served as a cocatalyst to optimize the electron structure of Fe–N–C, thereby synergistically improving the ORR activity.
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产品关联
DOI
PubMed
高影响因子
TRIBOLOGY INTERNATIONAL
·
2022
·
IF 5.62
Yuanya Zhang,Yu He,Yongjun Zhou,Meng Liu,Yanling Wang,Junya Yuan,Xuehu Men
In this study, the RGO/CNTs/MXene aerogel-epoxy composites (RCM-EP) were fabricated via freeze drying following by resin perfusion process. RCM aerogel with different pore sizes and morphologies were regulated by changing concentration of MXene . In addition, mechanical properties and thermal behaviors of EP composites with RCM and dispersed fillers were comparatively investigated. The results show that the RCM-EP have a better mechanical strength and thermal properties due to outstanding dispersion performance, interfacial bonding and spatial thermal conductivity network. Simultaneously, tribological test results revealed the wear rate and friction coefficient of EP were reduced by 83.5 % and 53.1 %, respectively, with the incorporation of RCM aerogel . The RCM aerogel inside the EP matrix could improve the bearing capacity of composites and inhibit the accumulation of friction heat via 3D inter-crosslinked network. Moreover, the RCM aerogel was slowly released and participated in friction transfer during sliding process, constructing high-quality transfer film, which endowed the RCM-EP with distinguished tribological performance .
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产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 13
·e53668
·
IF 3
Pengxin He,Haihong Pu,Xinfeng Li,Xiaoqiong Hao,Jianhua Ma
Flexible and highly conductive fiber has attracted considerable attention with its massive potential in functional fabric, stretchable circuits, and wearable electronic devices. Herein, we prepared a novel secondary structure composite fiber based on aramid nanofibers (ANF)-reinforced thermoplastic polyurethane (TPU) fiber accompanied by carbon nanotube (CNT)-coated on its surface. The composite fibers' dispersibility, micromorphology, and application were systematically investigated. The TPU/ANF-0.5 wt% sample showed a robust reinforcing effect, as Young's modulus and tensile strength reached 17.2 and 20.2 MPa, respectively. Meanwhile, the conductive coating layer in the outer frame was formed via a TPU solution with 10 wt% CNT content, which gives the fiber excellent flexible electrical conductivity. Such a unique structural design enables the fiber to be closely attached to human skin and monitor human movement. In addition, this TPU/ANF@CNT composite fiber can also be used for light and electric heating. The photothermal equilibrium temperature can reach 120°C in 50 s, and the electrothermal equilibrium temperature increases to 62°C under 30 V. In summary, this secondary structure composite fiber with excellent electrical and mechanical properties might have great practical application potential in wearable electronic devices.
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产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2023
·
IF 8.8
Qian Wu,Li Tian,Xiangyu Shan,Huiling Li,Shuning Yang,Chao Li,Juan Lu
In this work, a novel electrochemiluminescence (ECL) sensor based on the CdSe@ZnSe and CNTs was constructed for the detection of melamine. CdSe@ZnSe acted as the co-reaction promoter for the enhancement of Ru(bpy) 3 2+ /tri- n -propylamine (TPrA) system and CNTs acted as carriers to immobilize more CdSe@ZnSe. The initial ECL signal significantly amplified due to the synergistic effect of CNTs and CdSe@ZnSe. The ECL signal decreased with the addition of melamine, and the change value of ECL intensity (ΔI) was linearly related to the logarithm of melamine concentration. The constructed ECL sensor was able to detect melamine in the range of 1.0 × 10 −11 − 1.0 × 10 −7 M, and the detection limit was 3.3 × 10 −12 M (S/N = 3). It can be used to detect melamine in milk samples.
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产品关联
DOI
PubMed
高影响因子
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