Advanced Composites and Hybrid Materials
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2026
·
IF 15.5
Yan Yingjuan,Xia Weimin,Wang Yinghui,Ren Haixuan,Xia Wei,Li Jing,Wang Xusheng,Zhang Zhicheng
Flexible piezoelectric sensors hold immense promise for wearable bioelectronics. Nevertheless, the inherently high polarization energy barrier of poly (vinylidene fluoride-trifluoroethylene) (P(VDF-TrFE)) increases the energy requirements of the polarization process and limits further improvements in polarization efficiency and device performance. Herein, a cation-regulated interfacial polarization enhancement strategy via filled inorganic fluorides (AlF 3 , BaF 2 , CaF 2 , and MgF 2 , respectively) with unique fluoroaffinity effect, is proposed to fundamentally boost the piezoelectric and electromechanical performance of P(VDF-TrFE). First-principal calculations and spectroscopic analyses reveal a synergistic dual-interfacial network comprising - C - H···F hydrogen bonds and cation-driven ion-dipole interactions. Notably, the high-valence Al 3+ maximizes interfacial charge transfer, establishing a robust built-in electric field in the P(VDF-TrFE)/AlF 3 composites. This significantly lowers the conformational transition barrier, driving a massive electroactive β -phase transition (~ 89.0%) and facilitating ferroelectric domain switching with a substantially reduced coercive field. Consequently, the optimized AlF 3 -filled film delivers an outstanding piezoelectric strain coefficient (| d ₃₃|≈ 37.5 pC/N) in quasi-static mode, and achieves an exceptionally durable peak power density of 85 µW cm − 2 in as-assembled flexible sensor. This enables continuous self-powered kinematic monitoring, accurately capturing the multi-scale range of motion in human joints, thereby providing an atomic-level design paradigm for next-generation digital medical rehabilitation. Graphical abstract
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2026
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IF 5.4
Le Chen,Jinghong Chen,Zhenxing Tan,Rongrong Hu,Liyuan Xu,Wenxia Wang,Yong yuan,Lihua Zhou
Prussian blue analogues (PBAs), as promising peroxymonosulfate (PMS) activators for water remediation, typically suffer from issues such as agglomeration, morphological inconsistency, and insufficient active site exposure, limiting their practical application. Here, we developed a tannic acid-mediated synthesis of silver-doped PB nanocomposites (TA-AgPB) for efficient activation of PMS and rapid degradation of p-chlorophenol (4-CP). The TA-AgPB system achieved 99% degradation of 4-CP within 10 minutes, exhibiting a kinetic constant 2.1 times higher than that of unmodified AgPB, and exhibited superior adaptability in pH 5.0-9.0. Furthermore, TA-AgPB demonstrated marked performance enhancement, with PMS utilization and mineralization rates increasing from 51.6% and 41.5% to 90.4% and 68.2%, respectively. Ag plays an indispensable role in the activation process. The introduced Ag not only synergizes with Fe centers to facilitate electron transfer but also modulates the electronic structure of the active sites to promote the generation of reactive oxygen species (ROSs). Tannic acid, as a multifunctional green modifier, possesses abundant phenolic hydroxyl groups that not only effectively coordinate with metal ions to suppress Ag + leakage and particle aggregation but also facilitate the formation of uniform nanostructures, significantly increasing active site exposure. Quenching experiments, electron paramagnetic resonance (EPR) and electrochemical studies revealed the synergistic generation of •OH, SO 4 •⁻ , O 2 •⁻ and 1 O 2 , constitutes the primary mechanism for 4-CP degradation. DFT calculations confirmed thermodynamically favorable degradation pathways. This work provides a polyphenol-mediated synthesis strategy for designing stable and efficient PBAs catalysts, advancing their practical application in water purification.
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JOURNAL OF FOOD COMPOSITION AND ANALYSIS
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2026
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IF 5.3
Lei Wang,Yue Huang,Jiawei Su,Haojie Su,Weihao Shen,Sanqing Huang,Xueqin Zhao
Ensuring food safety requires reliable methods to monitor toxic contaminants like p-aminophenol (p-AP), which can migrate from plastic packaging or accumulate as veterinary drug residues in food products. However, the absence of rapid and field-deployable detection methods poses a persistent obstacle to its effective monitoring. In this work, we developed iron-doped silicon quantum dots (Fe-SiQDs) as a robust peroxidase-mimicking nanozyme and engineered a dual-mode sensing platform for p-AP detection comprising a solution-based assay for laboratory use and a hydrogel strip for on-site smartphone-assisted quantification. The solution assay achieved high sensitivity (LOD: 5.22 μM) with excellent correlation to HPLC (R² = 0.9994), while the hydrogel strip enabled quantification within 15 min without complex instrumentation. The Fe-SiQDs-based hydrogel sensor was tested on real-world food matrices including honey and bottled water, achieving accurate recoveries between 93.2% and 119.5% with high reproducibility (RSD < 2.1%). This cost-effective and field-ready system provides a practical solution for rapid screening of p-AP in food samples, offering a useful tool for food safety monitoring.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Mengxiang Liu,Miao Li,Zhiwei Qiao,Boshi Gao,Jiale Fan,Dongdong Liu,Yu Zhang,Kaibo Yu,Tao Zhang,Xiaoxiao Huang
Electronic-structure framework couples dielectric polarization with conductive loss. • Electronegativity-dependent p-block doping provides a transferable design criterion. • Framework-guided p-block–doped Ti 3 C 2 T x achieves broadband absorption up to 5.24 GHz. Dielectric polarization optimization and conductive loss modulation are widely employed strategies for achieving lightweight and broadband electromagnetic (EM) absorption. However, a unified mechanistic understanding that explicitly correlates polarization and conductive loss with the underlying electronic structure remains lacking, rendering their synergistic regulation largely empirical. Herein, a combined theoretical–experimental framework is established to elucidate an electronic-structure–driven attenuation mechanism, using p-block nonmetal–doped MXenes as a model system. First-principles calculations reveal that selective bonding between p-block elements and Ti 3 C 2 T x induces charge redistribution, strengthens Ti–X interactions, and generates localized polarization centers, thereby activating coupled dipolar, interfacial, and defect-related polarization while simultaneously tuning conductive loss. Guided by this mechanism, Ti 3 C 2 T x MXenes doped with representative p-block elements (B, N, P, and S) are synthesized, achieving minimum reflection losses of −60.5 dB (B), −52.9 dB (N), −53.8 dB (P), and −54.8 dB (S). For same-period dopants, increasing electronegativity broadens the effective absorption bandwidth without altering the underlying dissipation mechanism, with N- and S-doped Ti 3 C 2 T x achieving bandwidths of up to 5.24 and 4.56 GHz. The strong agreement between theory and experiment establishes a universal electronic-structure–modulation pathway for regulating polarization and conductive loss in MXenes, providing theoretical guidance for designing lightweight, high-performance EM absorbers. Download: Download high-res image (257KB) Download: Download full-size image
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RSC Advances
·
2026
·Vol. 16
·期 31
·28604-28618
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IF 6.1
Na Qiang,Lihong Huang,Wenlong Zhang,Rouping Zheng,Yan Yu,Jiao Zou,Qingyun Tang,Yubo Zou,Jinyu Yang,Guocong Liu,Shuai Qiu,Shuo Tang
The design of magnetoactive hybrid scaffolds based on biocompatible piezoelectric polymers and magnetic nanoparticles (NPs) holds great promise for advanced bone tissue regeneration applications. In this study, electrospun magnetoactive poly(vinylidene fluoride-co-trifluoroethylene) [P(VDF-TrFE)] composite fibrous membranes doped with different concentrations of oleic acid-modified Fe3O4 (Fe3O4-OA) NPs were successfully fabricated via the electrospinning technology. The as-prepared P(VDF-TrFE)/Fe3O4-OA composite membranes exhibited a uniform fibrous morphology with an average fiber diameter of approximately 0.2 µm, and the piezoelectric crystalline β-phase was predominant. The homogeneous dispersion of Fe3O4-OA NPs endowed the composite fibrous membranes with typical ferromagnetic behaviour and tunable saturation magnetisation. In vitro biological evaluations confirmed the excellent biocompatibility of the composite membranes with bone marrow mesenchymal stem cells (BMSCs). CCK-8 assays indicated that the viability of BMSCs cultured on all composite membrane groups increased over time, and live/dead staining further verified that all composite membranes supported high BMSC viability. F-actin staining results revealed that BMSCs could effectively attach and spread on the composite membranes with well-developed cytoskeletal structures. Moreover, the osteogenic differentiation potential of the BMSCs on the composite membranes was systematically evaluated at the early, middle and late stages of osteogenic induction. Alkaline phosphatase (ALP) activity assays revealed that the composite membranes containing Fe3O4-OA NPs exhibited significantly elevated ALP activity compared with the pure P(VDF-TrFE) membrane, and RUNX2 immunofluorescence staining confirmed enhanced early osteogenic transcriptional activation in the BMSCs cultured on the Fe3O4-OA-doped composite membranes. Collectively, these findings suggest that the electrospun magnetic P(VDF-TrFE)/Fe3O4-OA composite fibrous membranes exhibit good cytocompatibility and support the osteogenic differentiation of BMSCs, indicating their potential as scaffold materials for bone tissue engineering.
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PubMed
高影响因子
Catalysts
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2026
·Vol. 16
·期 5
·480
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IF 4.5
Qifan Zhao,Kaijie Li,Hongbo Yu,Hongfeng Yin
p-nitrophenol (p-NP) is a pollutant with environmental persistence, bioaccumulation potential, and significant health risks, and is widely dispersed in wastewater, so efficient removal ofp-NP is imperative. Among the various methods, the catalytic reduction ofp-NP top-aminophenol (p-AP) using sodium borohydride (NaBH4) is a particularly promising one and, herein, catalysts play a crucial role. Among the various metals, Au shows unique catalytic activity forp-NP reduction. However, nanosized Au often exhibit limited activity and stability due to their high surface free energy. To address this challenge, we designed and synthesized Au-SnOxhybrid nanoparticles confined within hollow mesoporous silica nanoreactors (Au-SnOx@hm-SiO2) via a soft-template-assisted co-adsorption strategy. The resulting bimetallic Au-SnOx@hm-SiO2nanoreactor showed significantly enhanced catalytic activity toward the NaBH4-mediated reduction ofp-nitrophenol (p-NP) compared with its monometallic Au@hm-SiO2counterpart, owing to the synergistic effect between Au and SnOx. Among various Au/Sn ratios, the catalyst with an Au/Sn molar ratio of 1:0.1 demonstrated the highest activity, achieving complete conversion ofp-NP within 5 min at ap-NP/Au molar ratio of 529:1—a tenfold improvement over Au@hm-SiO2. Moreover, the catalyst maintained high efficiency over six consecutive cycles, with only slight deactivation, benefiting from the protective silica shell.
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POLYMER COMPOSITES
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2026
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IF 4.9
Wencong Tang,Yuxiang Lin,Minmin Mao,Kaixin Song
Dielectric polymer nanocomposites with low ceramic filler loadings are generally regarded as beneficial for suppressing conduction loss and enhancing breakdown strength. However, this conventional assumption overlooks the critical role of filler spatial distribution in governing microscopic electric field uniformity. In this work, 0.6(0.82Bi 0.5 Na 0.5 TiO 3 -0.18Bi 0.5 K 0.5 TiO 3 )-0.4SrTiO 3 (BNKT-ST) lead-free ceramics were synthesized and surface-modified with the silane coupling agent γ-aminopropyltriethoxysilane (KH550). The modified nanoparticles were then incorporated into a poly(vinylidene fluoride-co-hexafluoropropylene) (P(VDF-HFP)) matrix to fabricate a series of dielectric nanocomposite films with systematically varied filler contents (0.5–3 wt%). X-ray diffraction (XRD) and Fourier transform infrared (FTIR) confirmed the target perovskite phase of BNKT-ST and the coexistence of α and β phases in the polymer matrix. By combining quantitative image-based analysis of filler dispersion and microscopic electric field simulations, the spatial distribution of KH550@BNKT-ST nanoparticles in the P(VDF-HFP) matrix was systematically clarified: at excessively low filler loadings (≤ 1 wt%), nanoparticles were sparsely and unevenly dispersed; at a critical filler concentration of ~1 wt%, a continuous and spatially uniform insulating network was formed by the nanoparticles; while at higher filler loadings (> 1 wt%), slight agglomeration of nanoparticles occurred. A nonmonotonic dependence of breakdown strength on filler concentration was revealed. The continuous network at ~1 wt% effectively homogenized the local electric field, maximizing breakdown strength at 440 MV/m and an energy density of 8.97 J/cm 3 . This study demonstrates that low ceramic filler content does not inherently guarantee superior dielectric performance, and highlights the necessity of a critical filler threshold for achieving electric field homogenization in polymer-based dielectric nanocomposites. Highlights A nonmonotonic effect of filler content on breakdown strength is discovered. Quantitative analysis of filler dispersion is conducted to explain the mechanism. The underlying mechanism is revealed via phase-field simulation/analysis. The 1 wt% BNKT-ST/P(VDF-HFP) nanocomposite shows superior performance. This work provides guidance for designing high-energy-density dielectrics.
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CHINESE JOURNAL OF CHEMICAL ENGINEERING
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2026
·
IF 3.5
Kui Wu,Yujiang Ke,Lemei Huang,Chaohui Che
The molar solubility of p -Nitrobenzeneacetonitrile (PNBC) in 16 pure organic solvents was determined gravimetrically over the temperature range of 272.15 to 323.65 K at 101.3 kPa. Five thermodynamic models, namely the modified Apelblat, λh , NRTL, Wilson and Yaws models, were applied to correlate the solubility data, with the Yaws and modified Apelblat models showing the highest fitting accuracy. Molecular electrostatic potential surface (MEPS) analysis identified nitro oxygen and cyano nitrogen as the main hydrogen-bond acceptor sites of PNBC. Density functional theory (DFT) calculations further elucidated solute-solvent interaction energies and the underlying intermolecular interaction mechanisms. KAT-LSER model analysis revealed that solvent dipole/polarizability ( π *) promotes PNBC solubility, while hydrogen-bonding acidity ( α ) and basicity ( β ) exert inhibitory effects. Mixing thermodynamic properties (Δ mix G , Δ mix H , Δ mix S ) calculated via the Wilson model indicated that the mixing process of PNBC with solvents is spontaneous, entropy-driven, and endothermic. This work establishes a reliable PNBC solubility database, and clarifies its dissolution mechanism from macro to micro scales, offering critical thermodynamic support for the industrial crystallization and purification of PNBC.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2026
·
IF 8.7
Bingqian Zhou,Yin Yang,Renshun Zeng,Kaize Ju,Jiayin Li,Jingjing Hu,Ke Chen,Shiwei Jin,Laiyan Wu
PPDs caused static fluorescence quenching of PEP. • PPDs alter the microenvironment and hydrophobicity of amino acid residues in PEP. • PPDs bind to PEP via hydrophobic interactions and hydrogen bonds. • N-substituent structural variations may affect PEP binding and subsequent functional effects. Herein, the interaction mechanisms between pepsin (PEP) and two p -phenylenediamine derivatives, DPPD and CPPD, were investigated via multi-spectroscopic, computational, and enzymatic methods. UV–vis absorption spectroscopy, fluorescence spectroscopy, and time-resolved fluorescence confirmed the formation of ground-state complexes with a static quenching mechanism. Binding constant analysis revealed a stronger, more endothermic, and entropy-driven binding of CPPD compared to DPPD, primarily driven by hydrophobic forces. Both compounds induced secondary structural changes in PEP, evidenced by an increase in β-sheet and a decrease in α-helix. Crucially, DPPD and CPPD exerted distinct effects on PEP conformation. Molecular dynamics simulations showed DPPD binding stabilized PEP's structure while CPPD increased its flexibility. Molecular surface electrostatic potential (MESP) analysis rationalized these differences: CPPD's more polarized and extensive electrostatic field, stemming from its asymmetric cyclohexyl substituent, fostered stronger interactions but greater structural perturbation. These structural changes provided a direct rationale for the observed inhibition of PEP's enzymatic activity, where DPPD, despite weaker overall binding, induced specific active-site changes causing more pronounced inhibition. The antioxidant activities of both ligands decreased upon complexation. This study elucidates how subtle ligand structural differences dictate binding modes and functional outcomes in protein-ligand systems.
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高影响因子
WATER AIR AND SOIL POLLUTION
·
2025
·Vol. 236
·期 13
·1-17
·
IF 3
Zhang Shoucun,Li Zhuomin,Yang Ning,Wu Wenli,Wang Yuan
As an important intermediate, p -nitrophenol has been widely used in the production of various chemicals, including pharmaceuticals, insecticides, and dyes, etc. However, it exhibits significant ecological toxicity and has a tendency to accumulate in organisms, even at very low concentrations. Therefore, it is essential to remove p -nitrophenol as thoroughly as possible from wastewater before discharging it into the environment. Among various treatment methods, physical adsorption stands out as a safe, reliable, and widely applicable approach, particularly suitable for small-scale water treatment applications. In this study, a melamine/terephthalaldehyde-based material (PMT) with a rich mesoporous structure was synthesized. The presence of abundant nitrogen elements within the material’s structure enhances its adsorption capacity for p -nitrophenol. Subsequently, PMT was dispersed as the dispersed phase into a hydrogel (HGel) structure through post-polymerization, which improved the material’s stability during use. Experimental results demonstrated that the gel composite material achieved a 97.6% adsorption removal rate for p -nitrophenol-contained wastewater. Moreover, after six cycles of reuse, the material retained an adsorption removal rate of 84.2%, highlighting its excellent adsorption performance and reusability.
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APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Fang Liu,Shiqing Zhang,Shaokai Ma,Zihang Cao,Ying Li,Yuanhui Ma,Xuewen Xu,Jun Zhang,Yanming Xue,Chengchun Tang
Carbon-based metal-free materials have garnered significant attention as catalysts for the oxygen reduction reaction (ORR). Among these materials, boron carbon nitride (BCN) has emerged as a promising functional material owing to its exceptional electrochemical stability, superior corrosion resistance, and high specific surface area. However, BCN’s catalytic activity remains suboptimal, possibly due to its weak binding with *OOH. In this study, phosphorus-doped BCN (P-BCN) was synthesized using a one-step calcination approach and employed as an efficient ORR catalyst. P-BCN exhibits a half-wave potential (E 1/2 ) of 0.823 V, which is significantly higher than BCN’s 0.764 V, indicating enhanced ORR activity. Furthermore, after 5000 cycles of accelerated durability testing, P-BCN’s E 1/2 decreases by only 3 mV, demonstrating its robust ORR stability. Both experimental data and density functional theory (DFT) calculations confirm that P-BCN’s remarkable electrochemical performance results from its enhanced *OOH binding, increased carrier concentration, and accelerated charge transfer rate. Additionally, in a zinc-air battery (ZAB), P-BCN delivers an open-circuit voltage of 1.42 V, a peak power density of 155 mW/cm 2 , and a specific capacity of 605 mAh/g, demonstrating practical potential. The novel strategy proposed in this study offers a valuable reference for the broader application of carbon-based metal-free ORR catalysts.
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Frontiers in Energy Research
·
2025
·
IF 2.4
Tianjiao Huang,Wu Xia,Fnu Joshua,Vaishnavii Subbiah Ponnusamy,Qipeng Zhang,Sachin Kumar,Ao Yu
Rational interfacial engineering is crucial to designing non-precious electrocatalysts for the hydrogen evolution reaction (HER). Here we report a Cu3N/1T-MoS2 heterojunction in which ultrathin 1T-MoS2 nanosheets are conformally grown on conductive p-type Cu3N nanocubes. Spectroscopy and microscopy reveal intimate lattice contact and interfacial strain, while XPS indicates charge redistribution across the junction. In 0.5 M H2SO4, the optimized 1:1 composite delivers an overpotential of 387 mV at 50 mA cm−2 and a Tafel slope of 57 mV dec−1, outperforming both constituents (MoS2 ≈ 456 mV; Cu3N inactive at this current density). Continuous operation for 150 h demonstrates excellent acid stability. Electrochemical impedance and double-layer capacitance analyses show the lowest charge-transfer resistance and the highest electrochemically active surface area among all samples (Cdl = 103.6 mF cm−2), corroborating rapid electron transport and abundant accessible sites. The activity enhancement arises from a p–n heterojunction with a built-in field that promotes directional electron flow to MoS2 active edges, together with strain-induced defect exposure. This work identifies Cu3N as an effective platform to stabilize conductive MoS2 and provides design rules for interface-engineered HER catalysts.
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