ADVANCED FUNCTIONAL MATERIALS
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2025
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IF 19
Wei Cao,Waqar Ahmad,Maolin Yang,Yuhui Weng,Xiang Ji,Keli Yang,Jinqi Li,Wenhai Ji,Ping Miao,Feng Lin,Ming Zhang,Kejun Zhang,Jingchao Jiang,Ziwei Chen,Chengdu Liang,Jun Chen
Lattice defect-induced tuning of the chemical bonding environment is a promising strategy to enhance the performance of electrode materials. The deliberate introduction of oxygen vacancies (OVs) has demonstrated remarkable efficacy in boosting electronic conductivity and ion diffusion kinetics, while the resultant chemical bond engineering optimizes the bonding environment, thereby enhancing structural stability and electrochemical reversibility. This study pioneers a dual-modification strategy involving OVs -induced C-P bonds formation in the Zn 2 P 2 O 7 structure. Through systematic electrochemical characterization complemented by density functional theory (DFT) calculations, the synergistic mechanism between OVs-mediated electron structure modulation and C-P bonds reinforcement is elucidated. As a novel anode material for sodium-ion batteries, the engineered Zn 2 P 2 O 7−x @C composite exhibits substantially enhanced rate capability (316.6 mAh g −1 at 0.05 A g −1 ) and cycling stability (171.3 mAh g −1 after 1000 cycles at 1 A g −1 ), in stark contrast to the rapid performance degradation observed in pristine Zn 2 P 2 O 7 . Furthermore, the extension of this strategy to lithium-ion battery systems further validates the universal effectiveness of this defect/chemical bonding synergy strategy in improving alkali metal ions storage, demonstrating its broad applicability across various energy storage platforms.
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PROGRESS IN ORGANIC COATINGS
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2025
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IF 7.3
Ying Hou,Yaru Sun,Bo Cheng,Chao Liu,Zhongjie Lyu,Yan Liu,Fenglei Huang
Traditional intumescent flame retardant (IFR), typically composed of 2–3 flame retardants, have been widely used. However, they tend to weaken the mechanical performance of polymer-matrix composite and have a time-consuming compounding process. Here, a novel three-in-one IFR was synthesized via a self-assembly strategy. The three-in-one IFR was designed in which the ratios of phytic acid, piperazine and melamine were 1:3:3, 1:4:2 and 1:5:1, respectively, and they were named as PPM-1, PPM-2, and PPM-3. Additionally, their effects on the flame retardancy and mechanical properties of polyurea (PUA) composites were systematically investigated. Although they have the same ingredients, their performances are vastly different. Among the PPM, PPM-2 was found to exhibit exceptional performance. When 25.0 wt% of PPM-2 nanoparticle was incorporated into PUA, significant reductions in peak heat release rate (67.2 %), total heat release (19.9 %), and total smoke production (42.9 %) were observed. The mechanisms behind different fire safety and mechanical performance have been revealed with variations of microscale morphology and chemical decomposition. This work presents a practical strategy for utilizing nano-particles in soft protective structures, which is also expected to significantly benefit the development of three-in-one IFR.
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APPLIED SURFACE SCIENCE
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2025
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IF 6.9
Xuxu Wang,Wenbo Wang,Jinhui Li,Shuang Gao,Ping Nie,Fen Yao,Limin Chang
Transition metal phosphides (TMPs) are ideal anodes for lithium-ion batteries (LIBs) due to their high theoretical specific capacity and suitable lithiation potential. However, transition metal phosphides suffer from the shortcomings of large volume change and low electrical conductivity, resulting in poor rate performance and short cycle life. In this paper, nanofibers consisting of amorphous FeP x nanoparticles and N, P-codoped carbon substrate are synthesized by electrospinning and in-situ phosphidation to address these challenges. The amorphous structure with no grain boundary and isotropy can provide more Li + transport channels and Li + storage sites. Moreover, the N, P-codoped carbon substrate can effectively improve the electronic conductivity of the electrodes and the structural robustness of the nanofibers. Due to the unique structure and composition, the FeP x /C nanofibers exhibit excellent electrochemical performance when used as anodes for LIBs (stable cycling over 2200 cycles at 1 A g −1 ). It is suggested that the large pseudo-capacitance and fast Li + diffusion resulting from the amorphous structure are important reasons for the excellent electrochemical performance of FeP x /C nanofibers. This work provides a new idea to optimize the electrochemical performance of TMPs, which is expected to be used in other conversion anode materials.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
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IF 4.9
Jin Yu,Xu Zhang,Hai Wang,Longcheng Liu,Yushan Zhou,Chengtao Yue
Water hyacinth is recognized as one of the top ten invasive weeds that pose significant environmental hazards globally. The resourceful utilization of water hyacinth offers substantial ecological benefits. In this work, water hyacinth is employed to synthesize a phosphorylated biochar for the efficient decontamination of uranium-containing radioactive wastewater, thereby achieving dual environmental benefits. The biochar with a large specific surface area of 1328 m 2 /g and a large pore volume of 0.94 cm 3 /g is obtained via carbonization of a freeze-dried water hyacinth-phytic acid composite. It possesses a high density of uranophilic phosphoric acid groups, with the surface phosphorus content reaching 0.78 at%. As anticipated, phosphorylated biochar demonstrates superior adsorption performance for uranium (VI) ions. The removal efficiency achieves 99 % in a uranium solution with an initial concentration of 100 mg/L at a dosage of 1.0 g/L within 30 minutes, while the maximum adsorption capacity reaches 478 mg/g. It is proficient in removing uranium across a pH range of 2.2–6.6 and exhibits tolerance under high ionic strength conditions. The distribution coefficient for uranium attains 28.5 L/g, which is significantly higher than that of many other metal ions. Moreover, the biochar is readily regenerated by elution with diluted HNO₃ and reused up to five times without any loss of efficiency. Delightfully, phosphorylated biochar effectively reduces the uranium concentration in actual nuclear wastewater from 16 μg/L to below 4 μg/L. The effective adsorptive decontamination of radioactive wastewater, followed by the incineration of spent biochar, significantly reduces the volume of radioactive waste.
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ADVANCED FUNCTIONAL MATERIALS
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2025
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IF 19
Xing Lai,Weiye Xu,Yukui Gou,Hongxiang Zhang,Jianying Huang,Weilong Cai,Yuekun Lai
Phytate (PhA) holds considerable promise for constructing molecular sieve membranes due to its high density of long-range electrostatic attractions, customizable charge density, and excellent polymer affinity. Herein, PhA-Fe 3+ complexes constructed by controllable coordination assembly are presented, based on metal-organophosphorus biphasic interfacial coordination reactions, and use the PhA-Fe 3+ complexes to regulate the interfacial polymerization (IP) process to generate polyamide (PA) nanofiltration membranes. The PhA-Fe 3+ complexes impart a high density of long-range electrostatic and short-range hydrogen bonding forces to the amine monomers and provide tunable charge densities through flexible metal-organophosphate coordination. Hydrogen bonding and strong electrostatic interactions spatially enrich the amine monomers and temporally slow down their diffusion into the hexane phase, as demonstrated by molecular simulations, resulting in a PA/PhA-Fe 3+ membrane with increased surface area, enhanced microporosity, lower thickness, higher water density near pores, and nanoscale spotted structures. Those structures are recognized as the key factor in achieving a water permeance of 19.2 L m −2 h −1 bar −1 , alongside a MgCl 2 rejection of 96.7% and a Li + /Mg 2+ selectivity of 24.1 (Mg 2+ /Li + mass ratio = 20), surpassing those of reported nanofiltration membranes. This PhA-Fe 3+ complexes-modulated IP strategy offers fresh perspectives for constructing a highly permeable membrane for lithium extraction from salt lake brines. Graphical Here, PhA-Fe 3+ complexes are synthesized through metal-organophosphorus biphasic interfacial coordination to modulate interfacial polymerization, yielding polyamide nanofiltration membranes. Molecular simulations confirm that hydrogen bonding and electrostatic interactions spatially confine amine monomers while retarding their diffusion into hexane, endowing such ultrathin PA/PhA-Fe 3+ membrane with enhanced microporosity, enlarged surface area, nanoscale spotted morphology, and optimized hydration layer density at the pore interfaces. The optimized membrane exhibits high permeability and stable Li + /Mg 2+ selectivity.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
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IF 8.5
Huiqi Gao,Haiyun Ma,Jinjin Cui,Chang Wang,Hong Zhang,Yunhong Jiao,Jianzhong Xu
As a promising candidate to mitigate the intermittence of solar energy, multifunctional phase change materials (PCMs) with flame retardancy and fire warning are urgently desirable. Herein, we design a cellulose-based multifunctional aerogel PCMs with leak-proof, thermal energy storage, thermoelectric conversion, flame retardancy, and fire warning. As a natural plant fiber, the hollow structure of Kapok fiber (KF) endows the composite PCMs a high loading ratio and thermal energy storage density. Additionally, the polyhydroxyl KF can rapidly carbonize via synergistic catalysis of phytic acid and MXene, enhancing flame retardancy and achieving rapid fire alarm. Specifically, KSM@PEG-PA PCMs exhibit 98 % encapsulation efficiency and a high heat storage density of 173.1 J/g, as well as exceptional solar-thermal conversion efficiency (97.1 %). KSM@PEG-PA10 further converts the harvested thermal energy into electrical energy, generating 587 mV of voltage, 78.7 mA of current at 500 mw/cm 2 . The peak heat release rate (pHRR) and total heat release (THR) of KSM@PEG-PA is significantly decreased by 52.6 % and 32.8 %, respectively. Furthermore, the KSM@PEG-PA10 achieves an ultra-fast fire alarm response time of 2.0 s. This work offers valuable insights on the design of composite PCMs, expanding the application prospects in solar energy and fire safety.
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Advances in Bamboo Science
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2025
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IF 3.7
Haonan Ding,Xiaolong Li,Tiancheng Yuan,Yanjun Li
To ensure bamboo-based composites can withstand harsh environments, it is important to develop superhydrophobic and mildew-resistant coatings for the surfaces of the product. Achieving these functions on bamboo surfaces remains a challenging research problem. We applied a phytic acid (PA)-based hybrid coating to bamboo surfaces using a layer-by-layer self-assembly technique, and superhydrophobicity was further enhanced through modification with low surface energy substances. Scanning electron microscopy-Energy disperse spectroscopy (SEM-EDS) mapping results initially confirmed the successful creation of a microscale structure with improved hierarchical roughness on the bamboo surface. Following modification with octadecylamine (OA), the polyethyleneimine (PEI)/PA-Fe 3 + /OA/Bamboo demonstrated outstanding superhydrophobic performance, with a water contact angle reaching 151° and remaining above 150° without significant change over 2 min. Despite undergoing abrasion, scratch and tape peel tests, the PEI/PA-Fe 3+ /OA/Bamboo maintained high hydrophobicity, with a water contact angle remaining above 140°. Finally, phytic acid-based hybrid metal coordination complexes created a dense protective coating on the bamboo surface. This coating both prevented Aspergillus niger from accessing internal nutrients and inhibited its adhesion to the bamboo surface. Thus, the successful application of the superhydrophobic coating enhanced the mildew resistance of bamboo.
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JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2025
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IF 14.3
Bo Cheng,Yaru Sun,Wenyuan Zhang,Wenchao Zhang,Dinghua Li,Rongjie Yang
The heat accumulation caused by the high-power consumption of continuously upgrading electronic devices puts forward more requirements for efficient heat dissipation and fire safety of insulating materials. Herein, a bio-based flame retardant functionalized boron nitride nanosheet (BNNS@PP-Fe) was prepared via a simple mechanical exfoliation and self-assembly technology for reduction in the fire hazards of ethylene-vinyl acetate copolymer (EVA), as well as the improvement of its thermal conductive and mechanical performances. Arising from the highly flat oriented structure and rich flame-retardant functional groups of BNNS@PP-Fe, as well as the high compatibility between filler and matrix, the EVA/ATH/4BNNS@PP-Fe composites exhibited high thermal conductivity (0.78 W/(m K)) and outstanding flame retardancy with a dramatic decrease in peak heat release rate (p-HRR, 135.2 kW/m 2 ) and total heat release rate (THR, 60.3 MJ/m 2 ). Compared to neat EVA, the p-HRR and THR values of EVA/ATH/4BNNS@PP-Fe composite significantly decreased by 76.5% and 47.3%, respectively. Additionally, the flat-oriented structure and strong interfacial interaction also endow EVA/ATH/4BNNS@PP-Fe composites with excellent mechanical properties. This work provides a facile pathway to fabricate multifunctional BNNS and will promote the development of commercial insulating materials, not just EVA.
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Materials Horizons
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2025
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IF 10.7
Huping YAN,Liangyu LI,Chuanshuai Dong,Hao Wu,Ronghui Qi
Ambient humidity is an abundant yet underexploited energy reservoir, and its sustained conversion mechanisms remain elusive. This study employed single-layer, bilayer and ion-selective designs, in combination with Kelvin-probe force microscopy and molecular-dynamics simulations, to delineate the fundamental physics of hydrogel-based moisture-enabled generators (MEGs). We demonstrate that continuous, directional water flux—rather than ion migration—governs electricity generation: the transport of 1 g of H₂O through the hydrogel network yields ≈ 7.6 µA h, and vapor-phase migration alone sustains output over hours to days. Interrupting water transport (e.g., via carbon-membrane insertion or device sealing) extinguishes the current instantly. Moreover, the open-circuit voltage scales with the internal surface-potential gradient: increasing this gradient from 31.3 mV to 810.7 mV elevates the output by 2.5 times. Guided by these findings, we introduced a co-optimization strategy that simultaneously enhances water transport and amplifies the potential gradient, thereby achieving a 30–50% increase in output performance (from 0.6 to 0.93V). Surface evaporation contributes solely by sustaining water flux, whereas triboelectric effects are negligible. This work establishes a quantitative mechanistic framework and delivers clear design principles for robust, high-efficiency MEGs, paving the way for self-powered sensors, portable electronics and distributed energy-harvesting platforms.
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Materials Horizons
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2025
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IF 10.7
Qianwen Chen,Yanbing Huang,Wanshun Duan,Qijia Su,Yilong Wang,Fuxi Bao,Junjun Zhang,Wen Guo
The kinetics of the oxygen evolution reaction (OER) of Co3O4 in alkaline media can be promoted by a bimetallic co-doping strategy. Herein, we synthesize a Zn/Fe co-doped Co3O4 nanostructure (ZnFe-Co3O4) to enhance the oxygen evolution reaction performance in the alkaline media. The ZnFe-Co3O4 electrocatalyst exhibits a low overpotentials of 255 mV at 10 mA cm-2, a Tafel slope of 54 mV dec-1 in 1.0 M KOH and excellent long-term durability up to 120 hours at 100 mA cm−2. The X-ray photoelectron spectroscopy (XPS) reveals that Zn occupies octahedral Co3+ sites and Fe occupies tetrahedral Co2+ sites in the Co3O4 lattice. The experimental results together with theory calculations collectively demonstrate that ZnFe-Co3O4 follows the lattice oxygen mechanism (LOM) during OER process. In situ Raman spectroscopy shows that the truly reactive FeOOH/CoOOH species are formed through surface reconstruction during OER. Furthermore, it is found that the synergistic effects of Zn and Fe doping, which stabilize the Co3O4 structure and promote the generation of active (oxy)hydroxide species, are identified as key factors in the enhanced electrocatalytic performance. This work offers a novel concept for enhancing the electrocatalytic activity of electrocatalysts through doping strategies and provides guidance for the rational design of ideal electrocatalyst.
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ACS Nano
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2025
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IF 16
Qihua Li,Jianfeng Li,Chen Zeng,Jingya Song,Yuchen Jiang,Haining Yu,Yu Fang,Shufeng Hu,Youwei Zhang,Weiqing Kong,Meifang Zhu
Passive radiative cooling fabrics offer a sustainable pathway to reduce energy consumption in thermal management, yet their reliance on petroleum-derived materials and complex coating processes compromises both environmental compatibility and wearability. To address these challenges, we propose a bioinspired, coating-free strategy by designing regenerated cellulose/SiO2 nanoparticle fibers (RCSF) via wet-spinning. Mimicking the micro-nano structure of the human skin surface (protrusion height ≈ 2 μm), the RCSF achieves simultaneous high solar reflectivity (93.7% at 0.4–1 μm) and infrared emissivity (0.98 at 8–13 μm) through intrinsic material properties rather than external coatings. The hierarchical porous structure enhances the specific surface area while maintaining air permeability (75% improvement vs pristine cellulose fabrics) and moisture-wicking performance. Under 800 W m–2 solar irradiation, RCSF exhibits a net cooling power of 100.1 W m–2, translating to a 5 °C temperature reduction in summer environments compared with regenerated cellulose fibers (RCF). Crucially, this one-step fabrication method eliminates toxic paints and energy-intensive post-treatments, offering a cost-effective alternative to conventional coated fabrics. By integrating renewable cellulose with skin-wrinkle-inspired structural design, our work establishes a paradigm for eco-efficient radiative cooling materials that balance optical performance, wearer comfort, and scalable manufacturing.
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COMPOSITES PART B-ENGINEERING
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2025
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IF 14.2
Xiang Li,Yanji Zhu,Yue Sun,Dan Lin,Huaiyuan Wang
In harsh humid environments, conventional epoxy coatings suffer from inadequate corrosion resistance due to microporous defects formed during curing, while the trial-and-error optimization of fillers faces challenges such as unclear mechanisms and low design efficiency. This study proposes a novel "computation-driven material design" paradigm, elucidating the synergistic moisture-resistant mechanisms of fillers through cross-scale simulations. Molecular dynamics (MD) simulations show that adding 3 wt% graphene oxide (GO) reduces the free volume of epoxy by 15% and decreases the water diffusion coefficient by 10%. Density functional theory (DFT) calculations identify a high adsorption energy barrier (21.831 eV) generated by fluorine groups in polyfluoroaniline (PFAN) through electron cloud redistribution, effectively suppressing water penetration. Monte Carlo (MC) simulations further bridge microscopic energy barriers with macroscopic penetration flux. Guided by these insights, reduced graphene oxide-polyfluoroaniline (rGO-PFAN) composite fillers are synthesized via covalent grafting, experimentally demonstrating synergistic barrier-hydrophobic effects. Epoxy coatings containing 1.5 wt% rGO-PFAN retain an impedance modulus of 4.44×10 11 Ω·cm 2 after 90-day immersion, while 2 wt% filler reduces long-term water absorption by 73.63%. Salt spray tests confirm superior corrosion suppression at defect regions. Mechanical property tests show that the coating exhibits significantly reduced wear loss, enhanced adhesion strength, and perfect adhesion after thermal cycling. This work pioneers the multiscale correlation from electron-cloud interactions to macroscopic anticorrosion performance, establishing a theoretical framework for the rational design of intelligent coatings in extreme environments.
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危险品化学品经营许可证（带存储）