Materials Today Chemistry
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2026
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IF 7.4
Ziyi Wang,Fenglong Chen,Wei Fan,Yuzhe Guo,Yingnuo Liu,Jiaxin Li,Litao Tian,Rui Lu,Yulun Xie,Jingmei Xu
The composite membranes were fabricated using electrospinning technology. • 1/SPCeS/1 showed the highest proton conductivity (224.27 mS cm −1 at 90 °C). • 1/SPCeS/1 showed good mechanical properties and oxidation stability. In this work, sulfonated poly (arylene ether ketone sulfone) (SPAEKS) polymers were prepared via condensation polymerization, and sulfonated dopamine-modified cerium oxide (SPD@CeO 2 ) nanoparticles were integrated into the polymer matrix. An array of composite membranes was fabricated using electrospinning. The fillers and composite membranes were analyzed through various characterization methods. The obtained 1/SPCeS/1 (with 1 wt% SPD@CeO 2 added to the spinning solution) fiber composite membrane exhibited good performance. With the intrinsic free radical scavenging effect of CeO 2 and the synergistic effect of sulfonated dopamine, the oxidative stability of 1/SPCeS/1 reached 97.65%, the proton conductivity was 224.27 mS cm −1 (90 °C, 100% RH), and the peak power density reached 794.92 mW cm −2 , which were all verified to be superior to the corresponding values of the pure membrane. The results indicated that the combination of functional nanoparticles and electrospinning technology effectively enhanced the overall performance of the proton exchange membrane. This strategy fully aligns with the core principles of green chemistry, namely using low-toxicity raw materials, adopting mild and energy-saving preparation routes, reducing harmful organic solvents, and providing a sustainable and environmentally friendly alternative to conventional perfluorinated proton exchange membranes. Download: Download high-res image (305KB) Download: Download full-size image
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OPTICS COMMUNICATIONS
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2026
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IF 2.7
Haiyu Tian,Haidong Qi,Yongjun Zhang,Yaxin Wang,Xiaoyu Zhao,Renxian Gao
Surface-enhanced Raman scattering (SERS) is a powerful surface analysis technique that significantly amplifies the Raman scattering signals of molecules adsorbed onto metallic nanostructures, enabling highly sensitive detection of the analytes. The development of low-cost, high-performance SERS substrates through facile and straightforward fabrication methods represents a challenging and highly rewarding endeavor. Here, we develop a suspended sandwich Ag/SiO 2 /Ag nanopore array structure based on template-assisted method with significant plasma coupling effects, which shows an ultra-low detection limit (LOD of 2.91 × 10 −11 mol/L) for 4-MBA molecules, excellent sensitivity (EF = 5.76 × 10 8 ) and high uniformity and stability. COMSOL simulation confirms the electromagnetic coupling in the sandwich structure in addition to the hotspots along the nanopore brims. The proposed SERS substrate enables quantitative detection of glyphosate with the concentration down to 4.66 × 10 −9 mol/L and fulfills the requirements for monitoring pesticide residues.
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Journal of Building Engineering
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2026
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IF 8.1
Zhaoyang Sun,Cuiyi Chen,Bin Xu,Zixuan Yang,Binmeng Chen
Four HPMC samples are synthesized with molecular weight ranging from 35 to 450 kDa. • Long-chain HPMC causes τ s to peak then drop, while τ d rises monotonically. • Longer-chain HPMC enhances flocculation but deteriorates floc structure. • τ s is governed by competing polymer-bridging and steric-hindrance effects. • τ d increases with HPMC dosage and chain length via stronger polymer interactions. Hydroxypropyl methylcellulose (HPMC), one of the most commonly used viscosity-modifying admixtures (VMAs), is extensively employed in fresh cement-based materials. Indeed, the chain length of HPMC greatly influences the rheological behavior of cement pastes. Here, four HPMC samples with distinct molecular weights ( M w ) from 35 to 450 kDa were chemically synthesized to systematically elucidate how chain length governs the rheology of cement pastes and to reveal the underlying mechanisms. Results show that HPMC with shorter chains (H1, H2, and H3 with M w < 220 kDa) induces a monotonic increase in both τ s and τ d with increasing dosage. In contrast, long-chain HPMC (H4 with M w = 450 kDa) causes τ s to rise from 29 to 114 Pa and then decrease beyond 0.3%, reaching 59 Pa at 0.5%, while τ d continues to increase from 45 to 148 Pa. This divergence in τ s suggests a dual role of adsorbed HPMC: longer chains (H4) may simultaneously intensify interparticle attraction through polymer bridging and enlarge particle separation via steric hindrance, the latter eventually overriding the former at higher dosages. The continuous increase in τ d is attributed to the strengthened polymer-polymer interactions with increasing chain length and concentration, promoting the formation of a more rigid polymer network in the interstitial solution that resists applied shear stress. Overall, this work establishes a systematic mechanistic framework describing how HPMC chain length modulates the rheology of cement paste.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2026
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IF 8.7
Ruimin Wang,Changkun Ding,Yu Zhang,Jing Li,Yutong Liu
Collagen is an ideal raw material for biological fibers, yet achieving long-range structural order and the resultant high-strength fibers without toxic crosslinkers remains a major challenge. This work integrates ultrasonic fragmentation with dialysis concentration to induce a stable lyotropic liquid crystalline (LC) collagen dope at a concentration as low as 3.3%, which is significantly lower than previously reported. Ultrasonic treatment reduced collagen fragment length to 10–30 nm, lowering steric hindrance and enhancing molecular mobility, thereby promoting nematic LC formation. Rheological analysis revealed that at 3.7%, the spinning dope exhibited a characteristic viscosity plateau in the low shear rate range of 1–5 s −1 , indicating shear-induced alignment of nematic LC domains, which defines the optimal spinning window. Using 4.0% LC dope and an optimized ethanol flow rate of 0.30 mL/min in microfluidic spinning process, the resultant collagen fibers achieved a high tensile strength of 2.21 cN/dtex and a thermal denaturation temperature of 120.8 °C. Increasing the spinning dope concentration progressively reduced lateral molecular packing distance, transformed the fiber surface from grooved to smooth, and enhanced thermal stability. This study establishes a rational, crosslinker-free strategy to fabricate high-performance pure collagen fibers with superior mechanical and thermal properties, providing critical theoretical and technical support for their application in absorbable surgical sutures and regenerative medicine. Download: Download high-res image (219KB) Download: Download full-size image
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Foods
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2026
·Vol. 15
·期 16
·2829
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IF 6
Jianchao Deng,Tianyu Chen,Jin Huang,Chunsheng Li,Xiao Hu,Xue Zhao,Yanyan Wu,Shengjun Chen,Yongqiang Zhao
The quality of yellowfin tuna is highly vulnerable to microbial proliferation, which accelerates quality deterioration and spoilage throughout storage. In this study, the dynamic changes in biogenic amines (BAs), total volatile basic nitrogen (TVB-N), and total plate count (TPC) across a different storage temperature range of 0 to 25 °C were studied, followed by a shelf-life prediction based on kinetic models. The TPC, TVB-N, and most BAs increased significantly with increasing storage time and temperature. Correlation analysis was used as an exploratory approach and showed that only histamine and cadaverine exhibited significantly positive correlations (|r| ≥ 0.6,p< 0.05) with TPC and TVB-N within the present dataset. Histamine was selected as a candidate BA indicator for kinetic modeling because only this BA changed significantly during storage at different temperatures. Utilizing histamine, TPC, and TVB-N, preliminary kinetic equations for shelf-life estimation were developed using first-order kinetics and the Arrhenius equation. Among the tested indicators, TPC showed relatively greater temperature sensitivity and preliminary within-batch agreement. These results provide preliminary reference data for further validation of tuna during the refrigeration process.
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Catalysts
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2026
·Vol. 16
·期 8
·725
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IF 4.5
Hongtao Xie,Limi Yan,Shijian Lu,Pengcheng Xiang,Dongliang Liu,Lili Wang
The electrocatalytic reduction of CO2into value-added chemicals offers a promising route to mitigate greenhouse gas emissions, yet the uncontrollable structural reconstruction and surface rearrangement of electrocatalysts during operation often lead to severe activity degradation. Herein, we reveal that Bi2O2SO4(BSO) undergoes an irreversible phase transformation into Bi2O2CO3(BCO) nanosheets accompanied by the partial reduction of Bi3+to metallic Bi0under cathodic potentials. A series of BCO/BSO heterojunction catalysts with tunable compositions are synthesized via a mild in situ ion-exchange method. To circumvent the detrimental effects of this dynamic reconstruction, we devise a pre-activation strategy that deliberately completes the structural evolution prior to electrocatalysis. The optimized 20%-BCO/BSO heterojunction achieves a remarkable Faradaic efficiency of 98.4% for formate production in a flow cell at elevated potentials, with >95% FE(HCOOH)over a wide potential window (−0.8 to −1.7 V vs. RHE). In situ infrared spectroscopy elucidates that the reconstructed interface can promote CO2adsorption, stabilize the *OCHO intermediate, and facilitate HCOOH desorption. This work provides experimental evidence of the reconstruction behaviour of bismuth-based catalysts and offers a rational design method for constructing structurally stable heterojunction electrocatalysts.
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MICROCHEMICAL JOURNAL
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2026
·
IF 5.2
Chenxuan Ai,Xueli Yang
MOF-derived ZnO and Au-ZnO materials were synthesized via a coprecipitation method. • The response value of 0.5 wt% Au-ZnO to 100 ppm n-butanol is 649.77 at 250 °C. • Response time is just one second, enabling real-time detection of n-butanol. • This sensor has a low detectable concentration, excellent selectivity and stability. N-butanol is a flammable volatile organic compound (VOCs) posing potential threats to human health and environmental quality, making its real-time detection critically important. Although Au-functionalized MOF-derived ZnO has been investigated for gas sensing, the influence of Au loading on surface-defect regulation and n-butanol sensing behavior remains insufficiently understood. Herein, porous ZnO rhombic dodecahedra derived from ZIF-8 were functionalized with controlled Au loadings of 0.25, 0.5, and 0.75 wt%. The optimized 0.5 wt% Au-ZnO sensor exhibited a response of 649.77 and a response time of 1 s towards 100 ppm n-butanol at 250 °C, with the response being approximately 3.6 times that of pristine ZnO. A measurable response of 1.41 was obtained at 50 ppb, representing the lowest experimentally verified concentration in this study. The sensor also demonstrated good selectivity, repeatability, and long-term stability. XPS analysis showed that the 0.5 wt% Au-ZnO sample possessed the highest relative oxygen-vacancy content of 34.8%. DFT calculations further suggested a stronger adsorption tendency of n-butanol on the Au-ZnO surface than on pristine ZnO. These results demonstrate that controlled Au loading provides a favorable balance among interfacial charge modulation, oxygen-vacancy regulation, catalytic activity, and adsorption-desorption kinetics. The dodecahedral structure of the MOF-derived ZnO confers high sensitivity to n-butanol on the sensor, providing uniform anchoring sites for gold nanoparticles (Au NPs). Through Schottky barrier modulation, catalytic effects and oxygen vacancy enhancement, the modification with Au NPs further improves the capture efficiency and signal amplification for n-butanol concentrations in the ppb range. Download: Download high-res image (231KB) Download: Download full-size image
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CARBON
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2026
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IF 12.7
Jiale Ma,Ying Huang,Hanjie Huang,Meng Zong
The as-prepared N-doped porous carbon microwave absorption material derived from Zn-benzimidazole (Zn-BIM) exhibits excellent electromagnetic wave absorption performance, achieving a minimum reflection loss (RL m ᵢ n ) of −57.33 dB with an effective absorption bandwidth (EAB) of 8.72 GHz at a matching thickness of only 2.41 mm. • The effects of Zn 2+ /BIM molar ratio and concentrated NH 3 ·H 2 O dosage on the microstructure and electromagnetic wave absorption performance of Zn-BIM derived carbon are systematically investigated. • The ethanol solvent and strong alkaline conditions facilitate the formation of low-crystallinity Zn-BIM frameworks with abundant defects. Such structure endows the material with abundant defect sites, heterogeneous interfaces and porous structures, thereby enhance its electromagnetic wave absorption capability. • After high-temperature pyrolysis, the Zn-BIM derived N-doped porous carbon effectively optimizes impedance matching and strengthens dielectric loss, realizing synergistic regulation of microwave absorption performance through impedance matching, dipole polarization, interfacial polarization and conductive loss. With the rapid proliferation of electronic devices and microwave communication technologies, severe electromagnetic interference (EMI) and electromagnetic radiation pollution have become pressing issues, urgently requiring the development of high-efficiency microwave absorbers with broad bandwidth and strong attenuation capability. Metal-organic frameworks (MOFs)-derived carbon materials have emerged as promising candidates for advanced microwave absorption by virtue of their tunable morphology, large specific surface area, and controllable heteroatom doping. Herein, hierarchical N-doped porous carbon microwave absorbers were successfully fabricated via a facile ethanol-mediated solvothermal route combined with high-temperature pyrolysis, using a Zn-benzimidazole (Zn-BIM) coordination polymer as the precursor, while concentrated NH 3 ·H 2 O served simultaneously as the alkaline regulator and N source. The microstructure, carbon defect density, and microwave absorption performance were systematically optimized by modulating the Zn/BIM molar ratio and NH 3 ·H 2 O dosage. The optimized sample delivered exceptional microwave absorption performance at a Zn/BIM molar ratio of 1:2 and NH 3 ·H 2 O dosage of 9 mL, achieving a minimum reflection loss (RL min ) of −57.33 dB at 2.41 mm and a broad effective absorption bandwidth (EAB) up to 8.72 GHz, well satisfying the requirements of practical electromagnetic protection applications. The superior absorption performance originates from the synergistic contribution of optimized impedance matching, conductive loss, dipole polarization, and abundant interfacial polarization induced by the hierarchical porous structure and N-doping. This facile and eco-friendly strategy provides a feasible reference for the rational design of high-efficiency microwave absorbers toward 5G/6G electromagnetic protection, aerospace radar stealth, and precision electronic device interference shielding. In this work, N-doped porous carbon materials were fabricated via high-temperature pyrolysis of Zn-BIM coordination polymers, using ethanol as the solvent and concentrated NH 3 ·H 2 O as the alkali source. The molar ratio of Zn 2+ to BIM ligand and the dosage of NH 3 ·H 2 O were systematically regulated. Experimental results reveal that the as-prepared material delivers excellent microwave absorption performance. When the molar ratio of Zn 2+ to BIM ligand is 1:2 and the NH 3 ·H 2 O dosage of 9 mL. Its minimum reflection loss (RL m ᵢ n ) reaches −57.33 dB, and the effective absorption bandwidth is up to 8.72 GHz. The superior absorption performance originates from the synergistic effect of multiple scattering induced by the structure defects. This work provides a new strategy to design lightweight microwave absorbers with strong absorption and broad bandwidth. Download: Download high-res image (417KB) Download: Download full-size image
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Nature Communications
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2026
·
IF 18.1
Li Chao,Chen Zehao,Li Wentao,Deng Ronghui,Huang Lingan,Song Yifan,Wang Yiqun,Cui Guoqing,Liu Huawei,Yu Jiakuo
Excessive transforming growth factor-β1 (TGF-β1) signaling is a key driver of the pathological processes of fibrosis and matrix disorganization in tendinopathy, yet current treatments do not directly target this fibrotic microenvironment. Here we show that a self-assembling peptide composed entirely of natural amino acids, AsPep-FTSQ, can locally capture TGF-β1 and remodel the pathological tendon niche. Injecting AsPep-FTSQ into rat and beagle models of tendinopathy resulted in the formation of an interconnected nanofibrous network in situ that selectively sequesters excess TGF-β1. This network suppresses pro-fibrotic signaling, limits pathological tendon cell (TC) state transitions, and promotes collagen realignment. These effects improve tendon structure and functional repair across species. This fully natural, self-assembling peptide composed of amino acids provides a modular strategy for local cytokine sequestration and suggests a therapeutic approach for tendinopathy and potentially other fibrotic soft-tissue disorders.
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CHEMICAL PAPERS
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2026
·
IF 2.7
Zhu Li,Gao Xizi,Zhang Lijuan,Zhang Jun,Guo Sheng
Advanced oxidation processes (AOPs) based on persulfate (PS) have been widely applied in environmental remediation owing to their ability to generate strong oxidizing reactive species. However, the traditional homogeneous and heterogeneous PS activation systems are prone to cause secondary pollution problems such as the leaching of toxic metals or the formation of sludge. To overcome these technical bottlenecks, this study constructed a ternary catalyst-free system coupling mechanical stirring (MA), ultrasonic irradiation (US), and PS, aiming to efficiently degrade organic contaminants in water bodies. In the proposed MA/US/PS system, peroxymonosulfate (PMS) demonstrates a significantly higher removal rate of Rhodamine B (RhB) than those of sodium persulfate (PDS), ammonium persulfate (PNS), and hydrogen peroxide (H 2 O 2 ) under the same conditions, which could be associated with the asymmetry structure of PMS, potentially facilitating its activation. Moreover, the MA/US/PMS system maintains stable catalytic activity over a broad pH range (3.09–10.52) and demonstrates excellent degradation efficiency in the presence of various coexisting anions and in actual water matrices. The effects of key operational parameters such as PMS dosage, agitation speed, ultrasonic power, and temperature on the degradation efficiency is comprehensively investigated. By combining radical quenching tests and electron paramagnetic resonance (EPR) techniques, the dominant reactive species responsible for RhB removal are identified. This work proposes an efficient, green, and catalyst-free activation strategy for PMS, which holds great potential for the advanced treatment of actual wastewater.
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DESALINATION
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2026
·
IF 9.9
Xiaowen Cui,Xin Wang,Tinghui Wu,Xiao Sun,Yicheng Wang,Ting Wang,Yutong Liu,Shengchen Wu,Boyu Liu,Yongqi Yang,Zhe Chen,Mengzhu Liu,Yongpeng Wang
A 3D BiFeO 3 /biomass carbon black/PVA aerogel was fabricated for integrated solar evaporation and PMS activation. • The optimized BCPA-3 achieved an evaporation rate of 3.15 kg m −2 h −1 under 1 sun and maintained stable desalination in 3.5 wt% saline water. • The BCPA/PMS system enabled tetracycline degradation with 65% removal and a rate constant of 0.02407 min −1 . • The coupling effect of porous structure, photothermal heating, and radical oxidation was elucidated for complex saline wastewater purification. Solar-driven interfacial evaporation represents a sustainable strategy for freshwater production. However, the simultaneous elimination of coexisting antibiotic pollutants remains a critical challenge. Herein, we report a robust, multifunctional composite aerogel (BCPA) fabricated via a freeze-casting strategy, integrating bismuth ferrite (BiFeO₃), waste green tea residue-derived biomass carbon black (CB), and polyvinyl alcohol (PVA). The optimized BCPA-3 features a hierarchical three-dimensional (3D) porous architecture that ensures rapid water transport (infiltration time: 7.0 s) and broadband solar absorption. Consequently, the evaporator achieves a high evaporation rate of 3.15 kg m −2 h −1 under 1 kW m −2 irradiation and maintains a rate above 2.6 kg m −2 h −1 in 3.5 wt% brine, demonstrating exceptional salt-rejection stability. The produced condensate meets WHO and EPA drinking water standards with major ion concentrations reduced to negligible levels. Beyond desalination, the BCPA-3 system exhibits superior catalytic activity in activating peroxymonosulfate (PMS) for tetracycline degradation, achieving 65% removal efficiency with a rate constant of 0.02407 min −1 . Mechanism investigations reveal that the degradation is dominated by a radical pathway involving SO₄· − , ·OH, and O₂· − species. Collectively, this work presents a novel material design paradigm that synergizes solar steam generation with advanced oxidation processes, offering an integrated solution for seawater desalination and antibiotic wastewater remediation. Download: Download high-res image (178KB) Download: Download full-size image
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ADVANCED FUNCTIONAL MATERIALS
·
2026
·
IF 19.9
Xinming Wang,Weichang Xie,Zichen Wang,Haonan Zhang,Jia Li,Xingjian Gao,Dingjie Zhou,Huaiyu Jiang,Shixing Huang,Qiang Zhao,Xiaofeng Ye
Repairing anisotropic tissues such as the myocardium requires implanted cells to organize into highly ordered structures. However, achieving controlled cell alignment remains a major challenge for current cell delivery patches. Here, we develop a magnetically aligned, fiber-reinforced extracellular matrix (ECM) patch that directs anisotropic cell organization and supports stem cell implantation. Poly-lactic acid fibers containing Fe 3 O 4 are fabricated via electrospinning and controlled hydrolysis, and are aligned uniaxially within ECM hydrogels using an external magnetic field prior to gelation. The resulting ECM–fiber patches exhibit enhanced mechanical strength and reliably guide the alignment of cardiomyocytes, fibroblasts, and endothelial cells. A beating patch is also created by seeding human induced pluripotent stem cell-derived cardiomyocytes (iPSC-CMs). In a nude mouse myocardial infarction (MI) model, implantation of iPSC-CMs@ECM–fiber patches preserves cardiac function, reduces apoptosis, limits fibrosis, and enhances vascularization. Implanted iPSC-CMs demonstrate high viability and low immunogenicity. Molecular profiling reveals transient modulation of early inflammatory responses post-MI, probably mediated through IL-17, IL-3, and IL-1β pathways. Overall, the ECM–fiber patch provides a versatile platform for delivering highly organized cells for in vivo tissue repair.
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危险品化学品经营许可证（带存储）