JOURNAL OF MATERIALS SCIENCE
·
2020
·Vol. 56
·期 2
·1386-1400
·
IF 3.553
Tong Zhe,Lu Hailin,Guo Feifei,Lei Wenxing,Dong Mochen,Dong Guangneng
The CNTs@Fe 3 O 4 hybrids were synthesized via a modified co-precipitation method and aligned along the through-thickness of carbon fabrics-reinforced epoxy composites (CFRPCs) by applying a weak magnetic field. The effects of the length, orientation and concentration of CNTs@Fe 3 O 4 on the mechanical and tribological properties of CFRPCs were investigated. The results showed that the modified co-precipitation method decreased the size of Fe 3 O 4 nanoparticles (approximately 10 nm in diameter), promoting the dispersion of CNTs@Fe 3 O 4 in epoxy resin. The alignment of CNTs@Fe 3 O 4 hybrids significantly increased the interlaminar shear strength (ILSS) and hardness of CFRPCs. The long CNTs@Fe 3 O 4 can more effectively improve the ILSS of CFRPCs compared to short CNTs@Fe 3 O 4 . Besides, the addition of aligned CNTs@Fe 3 O 4 hybrids significant improves the tribological properties of CFRPCs. Compared to long CNTs@Fe 3 O 4 -reinforced CFRPCs, the short CNTs@Fe 3 O 4 -reinforced CFRPCs show the best tribological properties. The properties anisotropy of CNTs@Fe 3 O 4 and high CNTs@Fe 3 O 4 concentration in near surface of CFRPCs are the main reason for the improvement in tribological properties of CFRPCs.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2014
·
IF 4.058
Shuzhen Li,Yibin Gong,Yichang Yang,Chun He,Lingling Hu,Linfei Zhu,Lianpeng Sun,Dong Shu
This paper presents the synthesis of magnetic carbon nanotube adsorbents, CNTs/Fe 3 O 4 nanocomposites, in which carbon nanotubes (CNTs) were grafted to magnetic Fe 3 O 4 particles by a facile hydrothermal method. The prepared CNTs/Fe 3 O 4 nanocomposites were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR), the Brunauer–Emmett–Teller (BET) surface areas, and magnetic property measurements. The adsorption behaviors of the CNTs/Fe 3 O 4 nanocomposites were evaluated for the removal of bisphenol A (BPA) in aqueous solution. It was found that the CNTs/Fe 3 O 4 nanocomposites exhibited strong adsorption behavior for BPA in aqueous solution, and the adsorption of BPA onto the CNTs/Fe 3 O 4 followed the Freundlich adsorption isotherm rather than the Langmuir adsorption isotherm. Moreover, the CNTs/Fe 3 O 4 nanocomposites used, which were separated via an external magnetic field, were independently regenerated by methanol-wash or chemical oxidation methods (Fe 2+ /H 2 O 2 , Na 2 SO 3 /Fe 2+ , or UV/H 2 O 2 ). The results demonstrated that as a recyclable adsorbent, CNTs/Fe 3 O 4 nanocomposites can maintain a high recovery extent (∼98%) via magnetic separation and retain their adsorption behavior within the limits (±1.34) after several adsorption–deactivation–regeneration cycles.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2025
·
IF 6.3
Yahui Wang,Xin Liu,Jian Tie,Jiexiong Ding,Peiyi Wang,Zipeng Jiang,Shengnian Tie,Changan Wang
As a crucial component in phase change heat storage systems, phase change materials have demonstrated remarkable application potential across diverse fields, such as solar energy storage systems, magnetic induction energy conversion, and storage. This research reports a high-performance photomagnetically driven composite phase change materials. The photomagnetic response unit was fabricated via the hydrothermal coprecipitation method by in-situ loading of Fe 3 O 4 nanoparticles onto carbon nanotubes (CNTs@Fe 3 O 4 ). Subsequently, it was integrated with the Na 2 SO 4 ·10H 2 O-Na 2 HPO 4 ·12H 2 O eutectic salt to synthesize the composite PCM heat storage material.Experimental findings indicate that the composite incorporating 2.5 % CNTs@Fe 3 O 4 exhibits nearly zero subcooling (ΔT = 0.1 °C), a thermal conductivity as high as 1.0230 W/(m·K), a significant latent heat of phase transformation (melting enthalpy of 253 J/g and solidification enthalpy of 218 J/g), and an enthalpy retention rate of 94.8 % after 1000 thermal cycles. The Fe 3 O 4 endows the material with excellent magneto-thermal conversion performance. Specifically, at a 2.5 % doping content, the temperature increase within 240 s in an alternating magnetic field can reach 67.2 °C through the Néel/Brownian relaxation mechanism. Additionally, the CNTs carrier enhances the photothermal conversion efficiency to 94.5 %. This material combines high thermal conductivity, cycle stability, and dual-field (optical/magnetic) driven heat storage capabilities, thus demonstrating significant application potential in multifunctional thermal energy storage.
研究领域:
材料科学
·
能源工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2018
·
IF 3.235
Jing Zheng,Min Zhang,Yang Ling,Jingli Xu,Shunzhong Hu,Tasawar Hayat,Njud S. Alharbi,Fan Yang
In this paper, multifunctional nanotubes were prepared by directly combing iron oxide (Fe 3 O 4 ) nanoparticle(NPs) decorated carbon nanotubes (CNTs), and palladium (Pd) NPs together with polypyrrole (PPy) in a facile way. Firstly, magnetic CNT composite (CNTs/Fe 3 O 4 ) was synthesized by the high temperature decomposition process, then PPy could be easily immobilized on the magnetic CNTs. Furthermore, Pd NPs were accumulated on the surface of CNTs/Fe 3 O 4 @PPy to obtain one dimensional CNTs/Fe 3 O 4 @PPy/Pd composite. The composite extraordinary amplified the electrochemical response, providing a highly sensitive electrochemical platform for triclosan detection. This electrochemical sensors had the advantage of fast response, cheap instrument, low cost, simple operation, high sensitivity and real-time detection in situ condition. Moreover, the sensor exhibited a wide linear response range for triclosan (2.247 × 10 −9 M to 2.752 × 10 −7 M) with a detection limit of 1.417 × 10 −9 M, respectively. In addition, the electrochemical sensor reported herein was applied for the detection of triclosan in real samples, revealing promising applications in developing the sensor for environmental inspection and monitoring.
研究领域:
材料科学
·
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMOSPHERE
·
2021
·
IF 7.086
Yunbo Liu,Xuemei Zhang,Jinhua Deng,Yong Liu
A novel composite (CNTs-Fe 3 O 4 ) was synthesized by a ball-milling strategy and characterized by BET, SEM, FTIR , XRD and VSM. The as-fabricated CNTs-Fe 3 O 4 was used to remove six sulfonamides by a Fenton degradation process, including sulfanilamide (SAM), sulfamerazine (SMR), sulfadimethoxine (SMX), sulfadiazine (SDZ), sulfamethazine (SMT) and sulfametoxydiazine (SMD). The degradation behaviors of six sulfonamides in CNTs-Fe 3 O 4 /H 2 O 2 system and the relationship between molecular structure of sulfonamides and their degradation behaviors were investigated systematically. Batch experimental results showed that the as-fabricated CNTs-Fe 3 O 4 had excellent Fenton catalytic activity for the degradation of sulfonamides due to its unique porous structure and the good combination mode of CNTs with Fe 3 O 4 particles. The first-order kinetic mode could better describe the degradation behaviors of six sulfonamides in CNTs-Fe 3 O 4 /H 2 O 2 system, and the degradation rate constant could be ordered as: SAM < SMT < SDZ < SMR < SMD < SMX. The quantitative relationship between the Mulliken charge of sulfonamides (x) and their degradation rate constant (y) in CNTs-Fe 3 O 4 /H 2 O 2 system could be described as: y = - 28.719x + 15.67 (R 2 = 0.957). Finally, the possible synthesis mechanisms of CNTs-Fe 3 O 4 and the degradation mechanisms of sulfonamides in CNTs-Fe 3 O 4 /H 2 O 2 system was proposed.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
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