Materials
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2026
·Vol. 19
·期 18
·3966
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IF 3.7
Zhe Tong,Xinghao Song,Wenxing Lei,Yajun Zhang,Jiaojiao Li,Li Zhao
The incorporation of various types of fillers is critical to enhancing the starved oil lubrication performance of PEEK matrix composites. In this work, PEEK composites reinforced with h-BN and SCFs were fabricated via a hot-pressing method, and the friction and wear behaviors under dry sliding and starved oil lubrication were systematically investigated. Surface oil wettability and Vickers hardness were characterized, and tribological tests were conducted on a ball-on-disk reciprocating tribometer. Worn surface topography and wear mechanisms were elucidated through laser scanning confocal microscopy and scanning electron microscopy. The results show that h-BN effectively reduces the friction coefficient through its solid lubrication effect, while SCFs significantly improve the hardness and load-bearing capacity of the PEEK matrix. Under dry sliding conditions, the PEEK composite containing h-BN and SCFs achieves the lowest wear rate of 10.3 × 10−5mm3/(N·m), which is 74.6% lower than that of pure PEEK, indicating a synergistic anti-wear effect. Under starved oil lubrication, PEEK/h-BN maintains the smoothest and lowest friction, and the presence of SCFs further improves wear resistance of PEEK composites despite a slight increase in friction. In addition, the fillers’ incorporation reduces the surface oil wettability of the PEEK composites; the dominant wear mechanism hence transforms from severe adhesive wear and plastic deformation in pure PEEK to mild abrasive wear.
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Nature Communications
·
2026
·
IF 18.1
Fang Geqian,Alhajjar Nour,Yu Wenjun,Marinova Maya,Ben Tayeb Karima,Lin Jian,Roland Thomas,Simon Pardis,De Waele Vincent,Ordomsky Vitaly V.,Khodakov Andrei Y.
Selective photocatalytic oxidation of methane to liquid oxygenates under ambient conditions remains challenging due to the inert C–H bond and propensity for over-oxidation. Controlling carrier transfer and reactive oxygen species is therefore essential to the selective methane photooxidation. Ultrasmall zirconium metal–organic framework (UiO-66-H) nanocrystals in situ grown on titania form a heterojunction that promotes efficient charge separation and tunes the interfacial band alignment. Comprehensive experiments and characterization reveal that this heterojunction precisely regulates • OH and • OOH generation, enabling controlled, radical-mediated oxidation of methane with a competitive oxygenate yield and nearly 100% selectivity at room temperature using air as an oxidant. In this work, ultrasmall metal–organic framework–semiconductor heterojunctions with a built-in electric field provide an effective route for developing efficient, low-cost photocatalysts for methane chemical valorization under mild, solar-driven conditions.
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JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2026
·
IF 4.4
Haoyi Xu,Xiaoning Deng,Ying Zhang,Yuwei Pan
Chelating agents significantly enhanced SDZ degradation in UV/Fe 2+ /H₂O₂ system. • The CA-enhanced systems operate efficiently across pH 3–8. • OH was the dominant reactive species, O₂· − and 1 O₂ played minor roles in SDZ removal. • Degradation pathways produced intermediates with lower toxicity than SDZ. • The system showed broad-spectrum reactivity and stability in natural freshwater. Antibiotics, widely detected in aquatic environments, pose significant threats to ecosystems and human health due to their recalcitrance in conventional wastewater treatment processes. This study systematically investigated the enhancement effects and mechanisms of three chelating agents (CAs) including NTA, EDTA and EDDS on sulfadiazine (SDZ) degradation in the UV/Fe 2+ /H₂O₂ system. Results showed that CAs significantly improved SDZ removal efficiency by complexing iron ions, promoting Fe 2+ /Fe 3+ cycling thereby enhancing photo-induced Fenton reactions. The NTA/UV/Fe 2+ /H₂O₂ system exhibited the highest performance, achieving 90.5% SDZ removal within 20 min, followed by EDTA (90.1%) and EDDS (88.7%) and without CAs (<35%). The CAs/UV/Fe 2+ /H₂O₂ system maintained high efficiency over a broad pH range (3–8), overcoming the pH limitation of traditional UV-Fenton processes. Electron paramagnetic resonance (EPR) and quenching experiments confirmed ·OH was the dominant reactive oxygen species and O₂· − and 1 O₂ also played minor roles. Degradation pathways of SDZ included ·OH oxidation, S N bond cleavage, and ring-opening reactions, producing intermediates with lower toxicity than SDZ. Meanwhile, the CAs/UV/Fe 2+ /H₂O₂ system could effectively remove various antibiotics (e.g., sulfamethoxazole, tetracycline) and maintain stability in the presence of inorganic anions and humic acid. Moreover, the CAs/UV/Fe 2+ /H₂O₂ system performed well in natural fresh water matrices, highlighting its practical application potential for antibiotic-contaminated water treatment. Download: Download high-res image (100KB) Download: Download full-size image
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Nature Communications
·
2026
·
IF 18.1
Tang Yu,Li Jiale,Li Yanfang,Ran Pan,Zou Weixin,Yan Shicheng,Dong Lin
Achieving stable and selective electrocatalytic nitrate reduction (NO 3 RR) at high current densities demands a fundamental understanding of the hydrogenation mechanism. We demonstrate that alloying cobalt with ruthenium (RuCo) switches the dominant hydrogenation pathway from the Eley-Rideal (E-R) mechanism, involving solvated protons, to the Langmuir-Hinshelwood (L-H) mechanism, utilizing adsorbed protons. Microkinetic modeling, in situ spectroscopy and density functional theory (DFT) calculations reveal that the competitive E-R pathway on pure Co causes sluggish hydrogenation kinetics and low Faradaic efficiency. In contrast, the L-H pathway on RuCo sustains high hydrogen coverage ( θ H ≈ 0.45), enabling efficient hydrogen-atom transfer for high-rate and deep hydrogenation. Leveraging this mechanistic insight, we achieve a satisfactory ammonia yield rate of 135.53 ± 1.18 mg h −1 cm −2 with 100% Faradaic efficiency and robust 1000-h stability at 1 A cm⁻². This work provides critical understanding of electrochemical hydrogenation pathways for designing efficient catalysts operating under industrially relevant conditions.
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MICROCHEMICAL JOURNAL
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2026
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IF 5.2
Huiwen Xiong,Fei Cun,Yuanxi Lu,Heng Liu,Cheng Bao,Daixin Ye,Wenhao Weng
Although numerous peroxidase (POD) mimics have been developed, most still suffer from limited stability and catalytic efficiency. In this work, platinum-decorated mesoporous gold (mesoAu@Pt) nanozymes with ultrahigh POD-like activity were synthesized via an in-situ growth strategy. The mesoporous gold nanostructures served both as carriers to stabilize Pt nanoparticles (PtNPs) and as a scaffold to enhance their catalytic activity. Owing to the uniform distribution of PtNPs, a single mesoAu@Pt particle exhibited exceptional catalytic efficiency, with a catalytic efficiency ( K cat ) of 1.05 × 10 7 s −1 . The optimized nanozyme enabled sensitive and selective colorimetric detection of both H₂O₂ and glucose, achieving ultralow detection limits of 0.1 μM and 0.4 μM, respectively, with wide linear ranges. The total turnaround time (TAT) was 15 min for H₂O₂ and 45 min for glucose. Furthermore, mesoAu@Pt successfully distinguished cancer cells from normal cells based on their endogenous H₂O₂ release, and demonstrated reliable performance in human serum samples with <6% relative error compared to a glucometer. These findings highlight the potential of mesoAu@Pt as a robust and versatile biosensing platform for blood glucose monitoring, cancer diagnostics, and next-generation point-of-care applications.
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Nature Catalysis
·
2026
·
IF 48.3
Ding Liang,Yao Ze-Cheng,Tang Tang,Wan Xin,Liu Xiaozhi,Jiang Zhe,Fu Jiaju,Shi Zhuo-Qi,Tai Jing,Lyu Zhen-Hua,Dong Jichen,Li Qing,Su Dong,Shui Jianglan,Hu Jin-Song,Wan Li-Jun
High-performance cathode catalysts are essential for proton-exchange membrane fuel cells. Intermetallic nanocrystals are promising candidates but suffer from intrinsic activity–durability trade-offs because their comprehensive catalytic properties are determined by several intertwined structural factors that cannot be optimized independently by existing synthesis techniques. The challenge lies in the inherent thermodynamic and kinetic constraints during synthesis. Here we develop a decoupled synthesis strategy that leverages block-copolymer micelle confinement, which enables the customized synthesis of libraries of intermetallic nanocrystals, simultaneously achieving ultra-small size, ultra-high ordering degree, tailorable loading density, narrow size distribution, compositional uniformity, and broad compositional and substrate universality. The developed Pt 3 Co intermetallic nanocrystal/Ketjenblack catalyst achieves a rated power density of 1.08 W cm −2 and 92% rated power retention after 30,000 cycles under light-duty-vehicle conditions and 900 h of stable operation at 10 A. It also delivered a 70.2% cell efficiency without degradation and 98.4% specific power retention after 90,000 cycles of heavy-duty-vehicle applications. This performance led us to project a lifetime of 240,000 h.
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JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2025
·
IF 6.2
Kuan Gao,Qin Geng,Changbao Hu,Wenhui Zhang,Xin Li,Ping Tong,Anshu Yang,Zhihua Wu,Hongbing Chen
Interactions between food allergens and polyphenols can provide a method to alleviate food allergies. This study investigated the effect of differently structured polyphenols complexed with Ara h 2 based on high-throughput virtual screening, utilizing a spectroscopic, thermodynamic, bone marrow-derived dendritic cells (BMDCs) model, BMDCs-T cells coculture model, KU812 cells model, and molecular simulation analyses for the allergenicity evaluation. Hesperidin (HSD), neohesperidin (NH), and neohesperidin dihydrochalcone (NHDC) exhibited a high binding energy and interacted with Ara h 2 through hydrogen bonding, primarily at two additional binding sites. This interaction led to protein unfolding and reduced hydrophobicity, particularly in the NH–Ara h2 complex. In addition, NH-bound Ara h2 has a lower potential for sensitization due to its reduced immunoglobulin E (IgE) binding capacity compared with Ara h 2 during gastrointestinal digestion. This is further supported by the decreased expression of costimulatory factors in BMDCs, the reduced release of allergenic cytokines, and the maintained balance of Th1, Th2, Th17, and Treg. The same trend was followed by the HSD and NHDC complexes. These findings suggest that glycosidic bond positions play a more significant role in reducing sensitization than does the flavonoid structure. Therefore, this study can assist in developing oral-specific immunotherapy of individuals with peanut allergies under the potential interaction mechanism of polyphenols and Ara h 2.
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ACS ES&T Engineering
·
2026
·
IF 6.3
Xu Pan,Jiangkun Xie,Mingze Jiao,Liang Shan,Hongyuan Qi,Wenjun Huang,Zan Qu,Naiqiang Yan,Haomiao Xu
Methane selective catalytic reduction (CH4-SCR) represents a promising strategy for nitrogen oxides (NOx) abatement, yet its practical application is hindered by catalyst deactivation in the presence of water, caused by competitive adsorption on acid sites and irreversible hydroxylation of active metal species. In this study, we developed a dual-functional In@H-Beta/Fe2O3 catalyst through sequential ion-exchange and impregnation. This architecture confines indium species within the channels of H-Beta zeolite, while Fe2O3 nanoparticles are dispersed on the external surface, creating a synergistic system featuring a hydrophobic layer and strong Fe–O–In interfacial interactions. Under 5% H2O conditions, the optimized catalyst achieves 85% NOx conversion (vs 40% for conventional In@H-Beta). The enhanced water resistance is attributed to two factors: first, Fe2O3 establishes a physical barrier that protects acid sites and stabilizes InO+ active sites via Fe–O–In bonding, thereby inhibiting hydroxylation; second, strong interfacial Fe–O–In interactions further stabilize InO+ active sites against aqueous deactivation. Additionally, the Fe2+/Fe3+ redox cycle is proposed to facilitate O2 activation. In situ DRIFTS studies under 5% H2O confirm effective CH4 activation, as indicated by markedly more intense C–H stretching bands compared with In@H-Beta. The reaction pathway involves NO activation over Brønsted acid sites to form nitrate species, and CH4 activation on InO+ sites generating methyl radicals, which subsequently participate in NOx reduction. This work offers a new design strategy for developing highly active and water-tolerant CH4-SCR catalysts suitable for industrial flue gas treatment.
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Advanced Science
·
2026
·
IF 14.1
Kai Wang,Kai Jiang
An imbalance in the bone–vessel-coupled regeneration process is one of the key factors hindering the effective treatment of diabetic bone defects, which are rooted in the impaired function of mitochondria. Inspired by the bilayered heterogeneous structure of the periosteum, a bilayered, biomimetic, Janus piezoelectric scaffold (JPS) with endogenous piezoelectric effects was developed to regulate energy metabolism. JPS comprises a zinc-doped apatite–gelatin–poly-L-lactic acid membrane fabricated using electrospinning and integrated with a resveratrol-loaded microsphere composite hydrogel. Without requiring an external power source, JPS is designed to respond to local micromechanical stimulation and generate electroactive cues, while synergizing with the controlled release of resveratrol to regulate angiogenesis-related signaling and endothelial metabolic reprogramming. Single-cell sequencing indicated that bone microenvironment remodeling may be associated with H-type vessels, which are bone-specific microvasculatures. JPS provides a continuous power source in a high-sugar environment, thereby reconstructing the bone–vessel coupled regeneration process. JPS treatment stimulated the vascular features associated with H-type vessel-mediated bone regeneration in vascular organoids. The JPS group showed a substantially enhanced bone volume of 21.1% vs. 8.5% in the control in a diabetic calvarial defect model. This study presents an efficient material platform for addressing clinical challenges associated with diabetic bone regeneration.
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MICROPOROUS AND MESOPOROUS MATERIALS
·
2026
·
IF 4.7
Baomin Wang,Haoxiang Yang,Chengcheng Fan,Fei Liu,Wenxin Lu
Alkali-activated materials show excellent capture capacity on heavy metals, but the mechanisms to immobilize heavy metals remain inadequately explored. This work investigated the main hydration product C-A-S-H gels for encapsulation of heavy metals such as Pb(II), Zn(II) and Cd(II). Furthermore, the adsorption behavior and mechanisms of Pb(II) in pore solutions by C-A-S-H were examined. These findings reveal that aluminum is incorporated into the silicon chains of C-S-H in the form of aluminum-oxygen tetrahedra, thereby generating C-A-S-H. The bonding ratio, which depends on the Ca/Si ratio, reaches its peak value of 0.139 when the Ca/Si ratio is 0.9. In highly alkaline environments, amphoteric Pb(II) and Zn(II) form hydroxyl coordination polyhedra, enhancing silicon chain polymerization, whereas Cd(II) is immobilized via ion exchange with Ca(II), resulting in solid solutions. For C-A-S-H with a Ca/Si ratio of 0.6, Pb(II) adsorption occurs predominantly through physical interactions. However, as the Ca/Si molar ratio increases, the effect chemisorption and ion exchange become more significant along with the formation of Pb 8 Ca(Si 2 O 7 ) 3 . C-A-S-H gel with a Ca/Si ratio of 0.9 has the highest Pb(II) adsorption capacity, reaching 92.55 mg/g.
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JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2026
·
IF 6.2
Kuan Gao,Qin Geng,Wenhui Zhang,Xin Li,Ping Tong,Anshu Yang,Zhihua Wu,Hongbing Chen
The effects of pH-shifting combined with quercetin binding on peanut Ara h 2 were evaluated using multispectroscopy, cell models, molecular simulation, and correlation analysis. After dual treatment, Ara h 2 exhibited significant structural changes, as evidenced by decreased intrinsic fluorescence and converted α-helix into β-sheet, leading to reduced IgE-binding capacity and diminished ability of dendritic cells and T cells to differentiate toward the Th2 pathway due to the masking of epitopes. Moreover, the binding sites of quercetin gradually shifted toward the hydrophobic core of Ara h 2 with pH changes, which inhibited fluctuations in the aa50–70 region. Finally, according to the correlation analysis, pH-shifting combined with quercetin binding may reduce the allergenicity of Ara h 2 by the migration of many Trp and Tyr residues to the protein surface, which disrupted the conformational epitopes. Therefore, this study provides an approach for the development of hypoallergenic peanut products.
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Nanoscale
·
2023
·Vol. 15
·期 7
·3199-3211
·
IF 6.7
Feng-Rui Wang,Xiao-Xiao Sheng,Min Zhang,Min Miao,Jin-Ku Liu,Ji-Chang Liu,Yun-Sheng Ma,Peng-Peng Liu
Zinc molybdate (ZMO) is a safe and effective grafting material for anticorrosion. Herein, we reported the synthesis of ZMO/h-BN with the labyrinth of capillary pores owing to the in situ growth of ZMO on flake hexagonal boron nitride (h-BN) using the hydrothermal method. The special morphological structure provided a tortuous path for aggressive species to the steel substrate, which extended and blocked the transmission of aggressive species, enhancing the physical corrosion barrier performance. In addition, the capillary pores of ZMO contributed to the competitive adsorption of Cl− in an electrolyte and reduced the diffusion of aggressive species, thus further delaying the corrosion process. Moreover, the capture of oxygen by forming a B–O bond with h-BN and the formation of a molybdate passive film are beneficial for the inhibition of cathodic and anodic reactions. As verified by electrochemical impedance spectroscopy (EIS), the anticorrosion performance of ZMO/h-BN coating increased by 49.58% and 130.72% compared with ZMO and epoxy resin (EP) coatings after immersing in a NaCl aqueous solution (3.50 wt%) for 72 h. This coating matrix provides an avenue for molybdate-based corrosion remediation.
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