ADVANCED COMPOSITE MATERIALS
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2025
·
IF 2.3
Wenbin Huang,Mengqi Duan,Yongjie Yan,Qingqing Ni,Xiaoming Qi,Lu Xu
Carbon nanotube fibers (CNTF) have great application potential in flexible electronics, smart wearables, bioelectrodes due to their excellent mechanical/electrical properties. However, CNTF is assembled by a large number of CNT monomers, and loose combination of these monomers usually weakens its mechanical/electrical properties. In this study, referring to the principle of carbon fiber precursor carbonization, the carbonization of PAN (polyacrylonitrile) was used to encapsulate and fix the CNTF precursor prepared by floating catalytic chemical vapor deposition to enhance CNTF mechanical performance. Firstly, PAN with different mass fraction was selected as sizing agent to treat the twisted fiber(CPAN@CNTF), then carbonized heat treatment was carried out at different temperatures. Through analyzing the enhancement effect of the structural changes of PAN on the mechanical/electrical properties of CNTF under different conditions, then, the mechanical properties of CNTF reached the best when the PAN sizing amount was 10 wt.% and the heat treatment temperature was 320ºC, and the breaking strength of CNTF was increased to 480 MPa, which was 44% higher than that of untreated CNTF group. It is found that the elastic recovery degree of slurry CPAN@CNTF is excellent through thermomechanical stretching, indicating that PAN after pre-oxidation and low temperature carbonization has a stable effect on the structure of CNTF.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Jieqiong Wang,Boxin Yu,Fengshuo Wang,Zhe Wang,Ming Xu,Yanping Wu,Hongyuan Zhang
Heavy metal ions (HMIs) pollution has become a significant threat to the global environment and agricultural safety. The accumulation of these metals in soil and crops may have a serious impact on human health. Therefore, it is of utmost importance to develop a rapid, reliable and highly sensitive detection platform. A self-supporting electrochemical sensor based on an interpenetrating twin ZIF-8/carbon nanofiber aerogel (ZIF-8(IT)/CNT-NFCA) was developed for the sensitive and simultaneous detection of Cd 2+ and Pb 2+ in soil and crop samples. Unlike traditional electrodes, this independent architecture eliminated the need for rigid conductive substrates and complex surface modifications. The freestanding 3D nanofiber network, reinforced by carbon nanotubes and embedded with twin-structured ZIF-8, provided a mechanically stable and highly conductive matrix with abundant accessible active sites. Under optimized differential pulse anodic stripping voltammetry conditions, the sensor exhibited wide linear ranges of 0.10–100 μg·L −1 for both Cd 2+ and Pb 2+ , with low limit of detection (LOD) 0.09 μg·L −1 and 0.05 μg·L −1 , respectively. Benefiting from the integrated structure, the sensor showed enhanced signal stability and resistance to electrode delamination under real sample testing. Applications in actual rice, wheat, soil, and water samples demonstrated high recovery rates and validated the sensor's reliability. This study provides a robust and portable sensing platform, offering promising prospects for field-deployable heavy metal ion monitoring in environmental and agricultural safety.
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JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2025
·
IF 8.4
Qixun Nian,Huayin Zhang,Kai Wang,Chunmin Wang,Qiuping Zhang,Qian Xu
The extensive use of antibiotics has led to the co-occurrence of multiple antibiotic classes in environmental water, necessitating efficient removal strategies. In this study, MOF-801@polydopamine@polyacrylonitrile nanofiber membranes (MOF-801@PDA@PAN NFMs) were synthesized via thermally initiated polymerization and layer-by-layer self-assembly for the simultaneous adsorption of 32 antibiotics from six major categories. Theoretical and experimental analyses confirmed rapid adsorption (within 10 min) through electrostatic attraction, hydrogen bonding, π-π interactions, and metal complexation. The membranes achieved removal efficiencies ranging from 39.22% to 98.83% and followed pseudo-second-order kinetics. Regeneration tests demonstrated stable performance over 15 reuse cycles. Compared to existing methods, these membranes offer broader-spectrum removal, higher efficiency, faster kinetics, and reduced adsorbent dosage. Additionally, they operate without pH or ionic strength adjustments and eliminate the need for post-treatment separation, highlighting their practical potential for environmental remediation. These findings offer a promising platform for scalable, cost-effective treatment of antibiotic-contaminated water.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yuqi Zheng,Bing Sun,Jingchao Yuan,Jibo Diao,Yuandong Jia,Xiangcun Li,Xiaobin Jiang,Gaohong He
High-efficiency desalination and selective cesium extraction from salt lake brine is critical to alleviate global freshwater scarcity and energy crises. Conventional evaporation and metal extraction systems lack synergistic integration between water transport, thermal management, and ion-selective enrichment. Herein, we report an integrated solar-driven interfacial evaporation and adsorption system—termed ‘Evadsorber’—based on a Prussian blue (PB)-modified nanofiber 3D network for concurrent desalination and Cs + capture. The hierarchical pore structure optimizes rapid water/ion transport, while PB's lattice cages serve as selective adsorption sites for Cs + . By introducing a cold evaporation interface to recover latent heat, we achieve a substantial evaporation rate enhancement from 3.25 to 6.06 kg·m −2 ·h −1 under 1-sun irradiation. Crucially, we demonstrate that photothermal evaporation generates dual thermal and concentration gradients, which synergistically drive Cs + diffusion and enrichment. This photothermal-synergistic adsorption process yields a record Cs + adsorption capacity of 233.45 mg·g −1 with exceptional ion selectivity under solar conditions-1.45 times higher than adsorption in darkness. Robust outdoor performance confirms the system's viability, establishing a new paradigm for concurrent freshwater production and critical metal extraction.
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Journal of Water Process Engineering
·
2025
·
IF 6.7
Abdul Qadir,Adeel Ahmed,Pervaiz Ahmad,Aisha H. Albalawi,Zahrah Alqahtani,Haia H. Aldosari,Raza Ullah,A. Timoumi,Awais Khalid
Metal–organic frameworks (MOFs) have currently attracted interest as effective self-sacrificial templates for the fabrication of hierarchical porous metal–nanoparticle materials. This study involved the synthesis of Cu-based MOF-loaded polyacrylonitrile (MOF/PAN) fibers using electrospinning, subsequently subjected to calcination in a nitrogen environment to yield Cu nanoparticle-loaded carbon nanorods (Cu@CNRs) as heterogeneous catalysts. The catalytic performance of prepared Cu@CNRs was investigated via hydrogen peroxide (H 2 O 2 ), peroxydisulfate (S 2 O 8 2− ), and peroxymonosulfate (HSO 5 − ) activated degradation of sulfamethoxazole (SMX). The activation performance of Cu@CNRs followed the sequence: HSO 5 − > S 2 O 8 2− > H 2 O 2 , indicating that HSO 5 − was the most effective oxidant under identical conditions. The Cu@CNR-I/HSO 5 − system demonstrated exceptional efficacy, attaining 99.99 % SMX removal in 30 min and a significant rate constant of 0.2312 min −1 . The improved activity is due to the hierarchical porous structure, elevated surface area, plentiful active sites, and robust Cu-N-C/HSO 5 − synergy. The carbonization created a polarization disparity in Cu N coordination, thereby promoting PMS activation by Cu(I/II) species. Radical quenching and EPR tests revealed that SO₄ •- and OH • radicals predominated the degradation route. The primary operating factors, such as catalyst and oxidant dose, solution pH, SMX concentration, coexisting anions, and humic acid, were carefully examined. The catalyst Cu@CNR-I exhibited remarkable catalytic stability and reusability over five cycles, indicating significant potential as a sustainable heterogeneous catalyst for wastewater treatment applications.
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JOURNAL OF THE TEXTILE INSTITUTE
·
2025
·
IF 1.5
Yameng Xiao,Hualei Liu,Chen Sun,Xinran Han,Roman A. Surmenev,Xia Yin,Yi-Tao Liu,Jianyong Yu,Bin Ding
Porous carbon materials are widely used in adsorption and catalysis due to their highly adaptable pore structures and high specific surface areas. Nevertheless, porous carbon materials still face the bottleneck problem of mechanical strength and flexibility. Herein, we construct a porous carbon nanofiber membrane composed of beaded fibers and traditional straight fibers, demonstrating exceptional flexibility and efficient formaldehyde adsorption performance. Specifically, we regulate polyacrylonitrile solutions with different concentrations via a dual-nozzle electrospinning technique, followed by using controllable pre-oxidation and carbonization progress, obtaining flexible carbon nanofiber material with a hierarchical micro/mesoporous and beaded network structure. The softness of porous carbon nanofiber membrane is comparable to nonwoven fabrics and significantly lower than tissue paper, and it goes through 1000 buckling cycles at 50% deformation without damage. Furthermore, dynamic impregnation with lysine endows materials with synergistic physical and chemical adsorption, making its formaldehyde adsorption capacity reached 3.44 mg/g under ambient conditions, which shows great performance improvement compared with unimpregnated materials (0.8 mg/g). In this sense, this material overcomes the traditional trade-off between rigidity and adsorption performance in carbon materials, offering a possible solution for indoor formaldehyde purification.
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Journal of Materials Chemistry A
·
2026
·
IF 9.2
Zhao Meng,Haibo Yang,Yongzhen Ma,Yan Cheng,Yanlong Ma,Binglong Zheng,Hongwei Zhou,Ying Lin
In increasingly complex electromagnetic environments, developing high-performance and dynamically tunable electromagnetic wave (EMW) absorption materials is essential. This study designed a pressure-responsive TiO2/CNFs@Co/C elastic aerogel for efficient EMW absorption. A 3D interpenetrating structure consisting of Ti3C2Tx MXene-derived TiO2 nanosheets, magnetic Co/C frameworks, and carbon nanofibers was constructed via electrospinning combined with in situ synthesis. This 3D interpenetrating structure constructs abundant heterogeneous interfaces, thereby enhancing interfacial polarization. The results demonstrate that the composite achieves an exceptionally broad effective absorption bandwidth (EAB) of 8.17 GHz at a thickness of 2.7 mm, with only 10 wt% filler loading. Additionally, the composite exhibits strong environmental tolerance, including hydrophobicity, stretchability, and thermal insulation. Notably, the alginate-induced elastic aerogels enable dynamic tuning from 6.4 to 18 GHz under compressive strains of 0% to 66%. This work designs dynamically tunable, high-performance EMW absorbers through component optimization and interface engineering, providing a promising strategy for the preparation of next-generation multifunctional intelligent EMW absorbers.
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JOURNAL OF APPLIED POLYMER SCIENCE
·
2026
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IF 3.1
Dongzi Zhou,Haicun Yang,Junfeng Cheng,Dong Wang,Dun Wu,Wenzhong Ma,Chunlin Liu,Yanping Xia,Fangli Sun,Zheng Cao
With rapid advances in nanotechnology and materials science, the development of high-performance humidity sensors has become a research hotspot. In this work, the porous carbon nanofibers (PCNFs) with controllable nanopore structure were prepared from polyacrylonitrile (PAN)/poly(vinylidene fluoride) (PVDF) blended polymers by electrospinning technique and carbonization method. The low-cost and easily available PCNFs were introduced into the polyvinyl alcohol (PVA) humidity-sensitive system, and the PVA/PCNFs composite nanofibrous humidity-sensitive layer was fabricated on the surface of quartz crystal microbalance (QCM) sensors. The PVA/PCNFs composite nanofiber-modified QCM moisture-sensitive element had good moisture-sensitive response characteristics with a maximum frequency response of −3114 Hz (11%–98% RH), a fitted correlation coefficient of R 2 = 0.9981, and response/recovery times of 36 s/< 1 s and 60 s/< 1 s under low and high humidity conditions, respectively. In addition, the QCM sensor based on PVA/PCNFs nanofibers showed good reproducibility and long-term stability. Compared with other moisture-sensitive elements, the PVA/PCNFs moisture-sensitive element has the characteristics of fast response and easy fabrication, which provides a solution for the preparation of low-cost, high-performance and environmentally friendly moisture-sensitive elements.
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ADVANCED FUNCTIONAL MATERIALS
·
2026
·
IF 19
Hao Chen,Jiayao Li,Wenjing Li,Yuting Dai,Xuejie Yue,Dongya Yang,Tao Zhang,Fengxian Qiu
Solar-driven interfacial evaporation offers a promising route to mitigate global freshwater shortage scarcity. Nevertheless, achieving efficient management of water, salt, and heat remains a critical challenge in designing photothermal evaporation systems. Inspired by the hierarchical structure of tree root–stem–leaf systems, we propose a three-level biomimetic strategy to fabricate a trilevel photothermal fibrous membrane that enables highly efficient and stable solar desalination of seawater. This membrane features a spatially and functionally decoupled architecture: a hydrophilic polyacrylonitrile (PAN) fibrous substrate serves as a root-like layer for rapid water uptake; a sulfobetaine methacrylate (SBMA)-modified PAN (PAN@SBMA2) intermediate layer mimics stem vasculature, synergistically regulating water retention and salt rejection through strong hydration and electrostatic screening; and a 2.0 wt% of molybdenum sulfide (MoS 2 ) loaded polyvinylidene fluoride (PVDF) (2.0MoS 2 @PVDF) top layer acts as a leaf-inspired photothermal zone for localized solar–thermal conversion and vapor generation. Benefitting from the synergistic water-salt-heat enhancement afforded by this ‘root-stem-leaf’ cooperative interlayer design, the resulting 2.0MoS 2 @PVDF-PAN@SBMA2-PAN (2.0MP-PS2-P) membrane achieves a high evaporation rate and an efficiency. This work not only presents an efficient solar-driven evaporation membrane for solar desalination but also demonstrates a systematic biomimetic structure paradigm for synergistic resource management in interfacial evaporation systems.
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ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Ze-Peng Bai,Ruoxi Zhang,Zi-Ying Xu,Hua Zou,Jie-Xin Wang
Heterogeneous catalyst-mediated photocatalysis is widely acknowledged as a highly promising approach for the efficient degradation of persistent antibiotics in water. In this study, a hydrophilic Cu2O/polyacrylonitrile (PAN) porous nanofiber membrane was synthesized by the electrospinning technique combined with a convenient poly(ethylene glycol) (PEG)-assisted template-removal method for photocatalytic degradation of tetracycline (TC). The Cu2O/PAN porous nanofibers (NFs) exhibited excellent photocatalytic degradation activity under visible-light irradiation, with degradation efficiencies and kinetic constants that were approximately 1.55-fold and 2.35-fold higher than those of nonporous Cu2O/PAN NFs, respectively. This enhancement resulted from a greater exposure of active components and a more hydrophilic fiber structure. Moreover, this composite fiber demonstrated exceptional stability, still maintaining a TC degradation rate of over 95% even after eight cycles, effectively addressing the instability and poor recyclability issues of Cu2O nanoparticles (NPs). In addition, this multifunctional nanofiber exhibited outstanding antibacterial activity against S. aureus and E. coli, achieving over 99% bacterial inhibition with a minimal nanofiber dosage under dark conditions. This work provides profound insights into the rational design and scalable fabrication of the porous multifunctional nanofiber membranes, thereby laying a solid foundation for the practical applications in water purification and antimicrobial materials.
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PubMed
高影响因子
WATER AIR AND SOIL POLLUTION
·
2026
·Vol. 237
·期 8
·484
·
IF 3
Dai Wei,Dai Ying,Zhang Di,Daniel Jesse,Zhong Xing,Li Zhuyao,Tao Qinqin
Radioactive wastewater containing high concentrations of radionuclides threatens ecosystems and human health. Developing environmentally friendly adsorbents with high enrichment efficiency and ease of solid–liquid separation is essential for removing europium from wastewater. In this study, three amide podand derivatives with different alkyl chain structures were loaded onto polyacrylonitrile via electrospinning, yielding DODGA@PAN, DPDGA@PAN, and DEHDGA@PAN nanofibers. The presence of two carbonyl oxygens and one ether oxygen in these materials enhances coordination with trivalent metal ions, making them highly efficient in europium removal.In reuse tests, DODGA@PAN and DPDGA@PAN maintained strong performance, with only 3.84% and 3.87% decreases after five adsorption–desorption cycles, respectively. In contrast, DEHDGA@PAN, due to its branched structure, exhibited higher adsorption capacity but lower reusability. This branched structure increased porosity, improving adsorption while also causing deformation, reducing its durability. Europium removal efficiency varied with changes in pH, temperature, time, and initial concentration. The Langmuir isotherm model confirmed effective europium adsorption by all three nanofibers. Kinetics indicated chemisorption, while thermodynamics showed the process was endothermic and spontaneous.
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ELECTROCHIMICA ACTA
·
2026
·
IF 5.8
Bin Yao,Xudong Bu,Yurong Zhang,Xiaodong Chen,Yanshuang Meng,Kai Zhang,Xiaofeng Zhu,Sheng Wang,Xueyan Du
Ti 3 C 2 T x MXene holds great promise as an electrode material for electrochemical energy storage, but its practical application is often limited by the restacking of nanosheets, which impedes ion accessibility and rate capability. Herein, a simple in-situ carbonization strategy using polyacrylonitrile (PAN) is developed to fabricate MXene/C composite electrodes. During pyrolysis, PAN transforms into N-doped amorphous carbon, which not only spacers and bridges adjacent Ti 3 C 2 T x MXene lamellae but also introduces porosity, thereby enlarging the interlayer spacing and forming a permeable mesoporous network while maintaining efficient electron transport. Electrochemical evaluation identifies 600 °C as the optimal carbonization temperature, leading to surface-capacitive-dominated charge storage with enhanced ion diffusion kinetics. By optimizing the composition, the composite with 20 wt% PAN achieves a specific capacitance of 237.75 F g -1 at 1 A g -1 , along with significantly improved rate performance and cycling stability compared to the pristine MXene electrode. This polymer-derived carbon intercalation approach offers a straightforward and effective route for tailoring the MXene interlayer structure, facilitating the rational design of high-performance supercapacitor electrodes.
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