CARBON
·
2024
·
IF 10.5
Jun Weng,Yanan Liu,Xiaoxiao Huang
Metal-Organic framework (MOF) derivatives have been applied as electromagnetic wave absorption (EMA) materials in recent years. Carbon nanotubes (CNTs) can achieve in situ growth on the surface of MOF derivatives. However, there is limited research on the EMA performance by regulating the morphology of the in situ grown CNTs. In this work, we prepared MOF-derived Ni@carbon nanotubes (Ni@CNT) with controllable length of CNTs by solvothermal and simple one-step pyrolysis method and revealed the CNT growth mechanism. We further investigated the effect of in situ grown CNT morphology on electromagnetic parameters and EMA performance. In situ grown CNTs of similar length on the surface of MOF derivatives lead to similar electromagnetic parameters. When the length of CNTs is short, the relaxation strength ( Δ ε = ε s − ε ∞ ) is high, leading to excellent microwave absorption performance. For Ni@CNT-600, the reflection loss of −44.4 dB can be achieved at merely 1.72 mm. Finite element (FE) simulation was used to evaluate the EMA mechanism of different samples by calculating electric field and polarization strength. This work has explored the electromagnetic wave absorption performance from the perspective of microstructural tailoring, helpful for understanding the unique role of the in situ grown CNTs on the surface of MOF derivatives and investigating the ultra-thin electromagnetic wave absorption materials.
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PROGRESS IN ORGANIC COATINGS
·
2025
·
IF 7.3
Haleema Sadia,Wan-Juan Jiang,Pan-Feng Zheng,Yan Zang,Ze-Hua Dong
We report a novel hydroxyl-terminated polydimethylsiloxane (PDMS)-based antifouling coating that incorporates hydroxyl-terminated multi-walled carbon nanotubes (CNTs) modified with capsaicin (CAP) and titanium dioxide (TiO 2 ) nanoparticles. The CAP & TiO 2 cladding layer provides the CNTs with excellent dispersibility within the PDMS matrix, leveraging the abundant hydroxyl functionalities of both modifiers. The resulting composite displays a synergistic combination of mechanical, biocidal, and corrosion-resistant properties. Mechanical tests show a significant increase in stress-strain values and a more than sixfold rise in adhesion to the mild steel substrate. The seawater immersion test demonstrates that the PDMS-based coating containing 7 wt% CAP-TiO 2 @CNTs achieves an impressive reduction of over 97 % in protein adhesion (measured via FITC-BSA assay) and over 99 % in antibacterial performance (against E. coli and S. aureus ). Additionally, this coating significantly decreases microalgal colonization and macrofouling attachment compared to pristine PDMS coatings. Besides the excellent antifouling properties, the PDMS-based coatings also demonstrate reasonable anticorrosion properties with their |Z| 0.01Hz (impedance at 0.01 Hz) increasing from 3.57 × 10 7 Ω.cm 2 (pristine PDMS coatings) to 2.52 × 10 10 Ω.cm 2 (7 wt% CAP-TiO 2 @CNTs modified PDMS coatings). These findings may highlight the potential application of PDMS-based coating in the antifouling field of ship hulls and coastal wind power piles.
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LANGMUIR
·
2025
·
IF 3.9
Chuxin Deng,Ningning Zhang,Jinrong Sun,Zifan Li,Mengjie Li,Shilei Xie,Shoushan Wang,Faliang Cheng
Zinc–air batteries are considered one of the most promising batteries for energy storage owing to their low cost, high safety, and high energy density. Developing effective bifunctional electrocatalysts is one of the important issues for zinc–air batteries. Although Fe2N demonstrates oxygen reduction activity comparable to that of Pt-based catalysts, its relatively poor catalytic activity for oxygen evolution and limited exposure of active sites still restrict its application. Herein, we report on the rational design and synthesis of FeS2 and Fe2N nanostructures on sulfur- and nitrogen-codoped carbon nanotubes as effective and ultrastable bifunctional electrocatalysts. The highly dispersed FeS2 and Fe2N nanostructures on CNTs provide numerous active catalytic sites, and the introduction of FeS2 improves the electronic structure and charge distribution of the electrocatalysts, significantly reducing the Gibbs free energy for rate-determining steps in the oxygen evolution reaction. The carbon nanotubes here can also accelerate the transportation of electrons and oxygen molecules, as well as enhance the stability of the electrocatalysts. Consequently, it achieved impressive oxygen reduction activity with a half-wave potential of 0.765 V vs RHE and a low overpotential of 0.46 V for the oxygen evolution reaction at a current density of 10 mA cm–2, respectively. Moreover, the homemade zinc–air battery based on the FeS2–Fe2N/SN-CNTs air-cathode can deliver a maximum power density of 119.2 mW cm–2. This study introduces a novel approach to the design of dual-function catalysts and zinc–air batteries.
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PubMed
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2025
·
IF 7.3
Huawei Li,Chen Huang,Mahmoud Farghaly,Dengfeng Kuang,Shibo Yan,Yan Xiao,Xueliang Xiao
This work presents a multifunctional composite film with integrated photothermal and electrothermal conversion, electromagnetic interference (EMI) shielding, and active de-icing capabilities, fabricated via electrospinning combined with layer-by-layer (LbL) self-assembly. Polydopamine (PDA)-modified thermoplastic polyurethane nanofiber membranes (PDA@TPU) served as the substrate. Synergistic interaction with sodium alginate (SA) enabled the layer-by-layer self-assembly of molybdenum disulfide (MoS₂) and carbon nanotubes (CNTs) onto the substrate surface. Subsequent Ca 2+ drop-addition reaction cross-linking ultimately formed a robust and stable coating. The PDA and SA layers significantly enhance interfacial adhesion between the conductive fillers (MoS₂/CNTs) and the polymer matrix, ensuring mechanical durability and efficient thermal conversion. The resulting five-layer film exhibits excellent performance: a photothermal temperature rise of 69.2 °C under 1 sun irradiation (100 mW/cm 2 ), electrothermal heating exceeding 80 °C at 7 V, and an EMI shielding effectiveness of 33.8 dB in the X-band. Notably, this film exhibits outstanding durability, with its electrical conductivity remaining virtually unchanged after repeated washing. Under dual photothermal and electrothermal stimulation (1 sun +7 V), the film can completely melt surface ice within 60 s, effectively preventing electromagnetic shielding efficiency degradation caused by ice accumulation. The layer-by-layer self-assembly technique based on PDA and SA systems offers a novel strategy for fabricating multifunctional composite films with outstanding comprehensive properties, demonstrating broad application prospects.
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Electrocatalysis
·
2019
·Vol. 10
·期 3
·277-286
·
IF 2.311
Chen Xiaowen,Wang Si,Wang Yan,Yang Zheng,Liu Sa,Gao Jingxia,Su Ziqian,Zhu Ping,Zhao Xinsheng,Wang Guoxiang
One-dimension (1D) heteroatom-doped mesoporous carbon is a promising alternative catalyst for oxygen reduction reaction (ORR). This work reported a hybrid ORR electrocatalyst composed of Co/CoO x nanoparticles embedded in N-doped mesoporous carbon layer coated on carbon nanotubes (CNTs@Co–N–C). Owing to the 1D mesoporous architecture with abundant active sites, CNTs@Co–N–C hybrid showed superior ORR activity, high selectivity, and long-term durability. Moreover, as cathode catalyst for primary Zn–air battery, CNTs@Co–N–C also showed excellent performance comparable to Pt/C. Thus, this study can offer a good idea for preparing noble-metal-free electrocatalysts for energy applications.
A 1D hybrid electrocatalyst composed of Co/CoO x nanoparticles embedded in N-doped mesoporous carbon layer coated on carbon nanotubes (CNTs@Co–N–C) was prepared for efficient ORR.
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POLYMER COMPOSITES
·
2025
·
IF 4.7
Guangyu Zhu,Jinping Guo,Xi Lu,Yanxia Cao,Yanyu Yang,Jianfeng Wang,Wanjie Wang
Basalt fiber (BF) has been regarded as a promising reinforcement material for high-strength composites because of its good mechanical properties, thermal stability, and eco-friendliness. However, the inherent interfacial incompatibility between inorganic BF and organic polyphenylene ether (PPO) resin severely limits the properties of basalt fiber-reinforced polyphenylene ether (BF/PPO) composites. This work employs maleic anhydride-grafted polyphenylene ether (PPO-MAH) and carboxylated multi-walled carbon nanotubes (CNTs-COOH) as a dual-functional hybrid sizing to improve the interfacial interaction of BF/PPO composites based on synergistic chemical bonding and mechanical interlocking. Compared with the unmodified BF/PPO composite, the interlaminar shear strength, flexural strength, and tensile strength of modified BF/PPO composites increase by 64.0%, 39.8%, and 63.4%, respectively. Furthermore, these modified BF/PPO composites exhibit excellent flame retardancy and display rapid self-extinguishing behavior and no dripping due to CNT-induced carbonization and a dense char layer. These results provide a practical, eco-friendly, and efficient approach to simultaneously improve the interfacial adhesion, mechanical properties, and flame retardancy of BF/PPO composites and enlarge their applications for aerospace, automotive, and defense applications.
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ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Qianqian Chen,Mengyu Li,Zhiguang Yang,Zexiang Liu,Zhirong Nie,Chenxue Yao,Bo Ouyang,Zhiwei Zhao,Sankui Xu,Bingbing Fan,Xiaochen Li
Metal–organic framework (MOF)-derived carbon-based composites have emerged as promising candidates for high-performance electromagnetic wave (EMW)-absorbing materials, yet the atomic-scale mechanism linking compositional doping to EMW energy dissipation remains to be clarified. Herein, core–shell SiO2@Ni–Co/CNTs composites were fabricated via epitaxial Zeolitic imidazolate frameworks (ZIF) growth on monodisperse SiO2 microspheres (∼1 μm) and controlled pyrolysis, focusing on the Ni-doping-driven charge rearrangement and synergistic mechanism. Material characterizations confirmed the well-defined core–shell structure, while electromagnetic analysis showed the optimized SiO2@Ni–Co/CNTs-2 sample achieved ultrastrong performance: minimum reflection loss (RLmin) of −61.21 dB at 1.85 mm, ultrabroad effective absorption bandwidth (EAB) of 6.64 GHz (11.36–18 GHz) at 2.09 mm, and 25.5 dB radar cross-section (RCS) reduction at 60°. Crucially, off-axis electron holography visualized interfacial charge accumulation, and DFT calculations quantified Ni-induced charge rearrangement, which intensifies dipole/interfacial polarization to dielectric loss enhancement. Combined with the optimized bimetallic magnetic resonance, this charge rearrangement drives a powerful synergistic effect that maximizes EMW attenuation. This work clarifies the “charge rearrangement-synergistic loss” link and provides a “structure-composition-charge-function” design paradigm for high-performance EMW absorbers.
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CERAMICS INTERNATIONAL
·
2026
·
IF 6
Yabo Gao,Hang Li,Huicong Lei,Xin Wang,Ling Zhang,Haijun Zhang,Zhong Huang,Shaowei Zhang
Low-carbon MgO-CaO-C refractories are promising for clean steel refining, but their application is limited by CaO hydration and the deterioration of high-temperature performance caused by reduced carbon content. In this work, a CNTs/CaCO 3 co-coated MgO-CaO powder (CC-MCP) was successfully fabricated via a densified micro-zone deposition process employing MgO-CaO particles, polyethylene powder, and starch as materials. The as-prepared CC-MCP were incorporated into low-carbon MgO-CaO-C refractories to achieve a “two birds with one stone” effect, simultaneously enhancing both hydration resistance and high-temperature service performance. Compared to the control sample prepared with flake graphite as carbon source, the counterpart containing CC-MCP exhibited superior hydration resistance and high-temperature performances, including a 286% improvement in water vapor resistance, an increase of up to 209% in oxidation resistance, a 36% improvement in thermal shock resistance, and a reduction in slag penetration depth from 654 μm to 435 μm. This “two birds with one stone” strategy provides an effective and scalable route for developing high-performance ultralow -carbon MgO-CaO-C refractories for clean steel production, while simultaneously offering a practical solution to the hydration challenges faced by CaO-containing refractories under harsh storage and service conditions.
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JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2026
·
IF 4.4
Shaoqing Geng,Xuehui Zhao
Membrane separation technology is a selective physical separation method that is widely used in the fields of wastewater reuse and recycling. However, its separation effect on small molecules in pollutants is not ideal. In this study, the negative pressure filtration method was adopted, combining membrane separation with photocatalytic technology to prepare a sandwich-structured WO 3 /g-C 3 N 4 /CNTs curtain hollow fiber photocatalytic membrane module with. By changing the experimental conditions, membrane anti-pollution property, stability and self-cleaning ability of the membrane module were studied under visible light irradiation. Through characterizations, it was found that when WCN/CNTs = 2:1 and pH = 12, the degradation rate of MB by the membrane module after 4 h of using was still 89.47%, which was 42.60 times higher than that of pure PVDF membrane module, and the water flux recovery rate (FRR) was as high as 98.21%. Stability experiments show that the degradation rate and flux of this membrane module remain stable at various pH levels, and the FRR values are all above 96.80%, while the FRR value of pure PVDF membrane modules is only 72.94%. This study provides a new idea for the preparation of semiconductor-based composite photocatalytic membranes with high self-cleaning ability and photocatalytic activity in the field of wastewater treatment.
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ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Zhiyong Bao,Zhijun Peng,Fujun Chang,Jiewu Cui,Juan Li,Xin Yao,Jun Lv,Guangqing Xu,Jiyan Dai,Yucheng Wu
The practical implementation of lithium–sulfur (Li–S) batteries is still impeded by two fundamental challenges: the low conductivity of lithium sulfide species (Li2S2/Li2S) and the shuttling of soluble lithium polysulfides (LiPSs). To tackle these issues, we propose an efficient polysulfide regulation strategy via a functional separator coated with Bi2Se3@NiSe2 heterostructures anchored on nitrogen-doped carbon nanotubes (N-CNTs). The rationally constructed Bi2Se3@NiSe2 interfaces not only offer strong chemisorption toward LiPSs but also act as highly active electrocatalysts to facilitate their conversion kinetics, particularly the nucleation and decomposition of Li2S. Coupled with the three-dimensional conductive network of N-CNTs, which ensures rapid electron/ion transport, the designed separator significantly suppresses the shuttle effect and enhances redox efficiency. As a result, Li–S batteries equipped with the Bi2Se3@NiSe2/N-CNT-modified separator achieve a remarkable initial discharge capacity of 1418.24 mAh g–1 at 0.1 C and outstanding long-term cyclability with a minimal decay rate of 0.083% per cycle over 500 cycles at 1 C. In situ X-ray diffraction further verifies the reversible phase evolution between α-S8 and Li2S during cycling. This work highlights the potential of bimetallic selenide heterostructures as multifunctional catalytic interlayers and provides a feasible pathway toward advanced separators for durable Li–S batteries.
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PubMed
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MATERIALS & DESIGN
·
2016
·
IF 3.997
Z.Y. Liu,K. Zhao,B.L. Xiao,W.G. Wang,Z.Y. Ma
A novel solution-assisted wet mixing processing was developed to efficiently produce CNT/Al composite powders . CNTs were firstly dispersed in zwitterionic surfactant aqueous solution, and then the flaky Al powders , produced from spherical Al powders by ball milling , were mixed with the CNT solution to adsorb the dispersed CNTs in the solution. It was indicated that CNTs could be uniformly adsorbed onto the flaky Al powders and CNT/Al powders with a maximum CNT concentration of 7.5 vol% could be obtained after filtering and drying. 1.5 and 3 vol% CNT/Al composites were then fabricated using the resultant composite powders through a powder metallurgy route. CNTs with average lengths of 0.9 μm and well-retained wall structure were uniformly dispersed in the Al matrix and aligned arrangement of CNTs was achieved after hot forging . Furthermore, it was found that most of CNTs were distributed at the grain boundaries and the CNT-Al interfaces were well bonded. The strengths of the CNT/Al composites were significantly increased, which could be attributed to the efficient load transfer of CNTs.
研究领域:
材料科学
·
纳米复合材料
·
粉末冶金
·
金属基复合材料
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2018
·Vol. 29
·期 10
·8673-8687
·
IF 2.324
Qin Qingyuan,Shi Qingdan,Sun Wen,Wan Junmin,Hu Zhiwen
The purpose of this research is to design and fabricate a novel ternary hybrid nanostructure heterojunction with high-efficiency visible-light-driven photocatalysis. The porous layered TiO 2 nanotubular structures (TNTs) with high percentage of photocatalytic reactive facets, which were turned into by commercially available TiO 2 , were wrapped on the surface of hydroxylation carbon nanotubes (CNTs) through the formation of Ti–O=C and/or Ti–O–C bond between CNTs and TiO 2 . Then the TNT@CNT nanotubular composites were coated by ultrathin g-C 3 N 4 nanosheets with a thickness of 3–4 nm. The ternary nanocomposites owned strong absorption performance, low charge recombination rates and high-efficiency photocatalytic activities, which were all owe to high surface areas and excellent adsorptivity of the CNTs, photocatalytic performance of TiO 2 nanotubes (TNTs) and moderate band gap of g-C 3 N 4 nanosheet. What’s more, the formation of chemical bonds greatly improved visible-light photocatalytic activity with a degradation rate of 98.2 and 97.9% for methylene blue and rhodamine B in 60 min under visible-light irradiation, which showed ~ 10 times enhancement compared to pure TiO 2 . In addition, the existence of h + and ·OH and ·O 2− radicals played main role in the photocatalytic process. The new material was of great significance to environmental protection and energy criss.
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