POLYMER BULLETIN
·
2026
·Vol. 83
·期 9
·491
·
IF 4.2
Yu Shuchun,Liang Heng,Zhou Pei,Liu Shuli,Si Yubing
Regulating the microstructure of anion exchange membranes through composite enhancement is a proven and effective method to improve membrane performance. In this study, a reversible addition fragmentation chain transfer (RAFT) polymerization was adopted to graft high-density cationic groups on the surface of graphene oxide (GO) using brush-like polymer structure, endowing the polymer brush functionalized GO (pGO) with good ionic conductivity. Then, it was blended with quaternized poly(terphenyl piperidinium) (QPTP) to prepare the composite membrane. It was found that when the content of pGO was 0.5 wt%, the pGO-QPTP membrane exhibited suppressed swelling ratio (12.4%@80 °C), satisfactory conductivity (120.5 mS cm − 1 @80 °C), and outstanding alkaline stability (> 2500 h), which was due to the enhanced interactions between the hydrophilic and hydrophobic components within the composite membrane. In addition, compared to the QPTP membrane, the single cell assembled with the pGO-QPTP membrane achieved a maximum power density of 406 mW cm − 2 at 70 °C, which was more than double that of the former.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2026
·Vol. 37
·期 18
·1391
·
IF 3.2
Zheng Zehan,Su Congxue,Wei Xiuzhen,Tao Wenlong,Liu Bochu,Pan Sisi,Fan Jun,Wang Ruijuan,Fang Liang,Lu Huidan
In this study, a strategy involving the incorporation of non-adjacent valence state cations into tetrahedral sites was employed. Microwave dielectric ceramics with the composition Ca 3 M 2 Ga 2.5 V 0.5 O 12 (M=Sn and Zr) were designed and synthesized using a solid-state reaction method. The crystal structure of these ceramics has been verified as cubic garnet with the Ia -3 d space group. Ca 3 Sn 2 Ga 2.5 V 0.5 O 12 and Ca 3 Zr 2 Ga 2.5 V 0.5 O 12 ceramics sintered at optimal temperatures exhibited favorable microwave dielectric properties, with Q × f values of 18, 571 GHz and 13,370 GHz, ε r of 9.65 and 9.34, and τ f values of − 43.1 ppm/°C and − 36.4 ppm/°C, respectively. The difference in ε r is primarily attributed to the ionic polarizability per unit volume and bond ionicity. The higher Q × f value of the Ca 3 Sn 2 Ga 2.5 V 0.5 O 12 ceramic correlates with its larger packing fraction, narrower Raman full width at half maximum, stronger average bond covalency, and higher total lattice energy. In contrast, the smaller | τ f | of Ca 3 Zr 2 Ga 2.5 V 0.5 O 12 is associated with its larger bond valence at the B-site, lower oxygen bond valence, and higher bond energy. Analysis using the Phillips−Van Vechten−Levine (P−V−L) theory and bond valence calculations demonstrates that the M 4+ cations occupying the octahedral sites have a significant impact on the microwave dielectric properties. Furthermore, a dielectric resonator antenna based on Ca 3 Sn 2 Ga 2.5 V 0.5 O 12 was designed for C-band communication (4−8 GHz).
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INTERNATIONAL JOURNAL OF THERMOPHYSICS
·
2026
·Vol. 47
·期 7
·112
·
IF 3.6
Shi Jiahao,Wang Jianan,Feng Junyu,Zhang Ke,Bi Shengshan
This study presents an investigation into the liquid density of isobutanol and 2-butanol at selected temperatures from 303.15 K to 383.15 K and pressures up to 200 MPa using a variable-volume high-pressure system. The apparatus was validated with n -decane, and the measured densities agreed with literature values within 0.2 %. The expanded relative uncertainty of density was estimated to be 0.27 % with a coverage factor of k = 2. The experimental data were correlated with the Tammann–Tait equation, yielding average absolute deviations below 0.05 % for both butanol isomers. The isothermal compressibility and isobaric thermal expansivity were derived from the fitted correlations to characterize the pressure and temperature dependence of the volumetric properties. In addition, the pure-component parameters for the perturbed-chain statistical associating fluid theory (PC-SAFT) equation of state were optimized using the 2B association scheme. The optimized PC-SAFT model reproduced the measured densities with average absolute deviations lower than 0.2 %. The results expand the available high-pressure density database for these two butanol isomers and may be useful for thermodynamic modeling and engineering calculations within the investigated temperature and pressure ranges.
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CELLULAR AND MOLECULAR LIFE SCIENCES
·
2026
·
IF 6.5
Zeming Lei,Liangzi Yin,Bin Zhang,Ziyuan Wang,Yansheng Wang,Lunhao Bai
Wear debris-induced periprosthetic osteolysis (PPO) is a major complication following total joint arthroplasty, leading to implant failure. Macrophage inflammatory response and osteoclastogenesis play important roles in bone destruction and resorption in PPO. KDM5C (lysine-specific demethylase 5 C), a H3K4 demethylase, functions as a transcriptional repressor in various biological processes, including immune response, energy metabolism, and neurodevelopment. However, its role in PPO pathogenesis remains unclear. In this study, we observed elevated KDM5C expression in macrophages exposed to Titanium (Ti) particles in vitro. Genetic inhibition of KDM5C attenuated Ti particle-induced upregulation of pro-inflammatory factors and reduced the release of inflammatory cytokines. Moreover, KDM5C knockdown suppressed osteoclast differentiation, as evidenced by the decrease in osteoclast number and osteoclast-specific marker expression. Mechanistically, KDM5C was found to repress NFE2L2 transcription by decreasing H3K4 trimethylation (H3K4me3) at its promoter. Inhibition of NFE2L2 abolished the protective effects of KDM5C knockdown on macrophage inflammation and osteoclast differentiation. The calvarial osteolytic model in vivo also demonstrated that silencing KDM5C alleviated Ti particle-induced bone destruction, inflammation, and osteoclastogenesis. Collectively, these findings suggest that KDM5C promotes macrophage inflammatory response and osteoclastogenesis by repressing NFE2L2 transcription through decreasing H3K4me3 levels. It may offer a novel insight into the potential therapeutic target for wear particle-induced osteolysis.
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PubMed
高影响因子
Science China-Materials
·
2025
·Vol. 69
·期 1
·215-227
·
IF 7.4
Chen Guangyuan,Tang Tingting,Li Yubao,Lin Chenyang,Zhou Shijian,Kong Yan
Metal sulfides like CdS hold promise for solar-driven H 2 O 2 productions but suffer from rapid charge recombination and severe photocorrosion. This study introduces a dual-functional strategy synergizing sulfur vacancy (S v ) engineering and polydopamine (PDA) coating to overcome these limitations. S v -CdS nanorods were hydrothermally synthesized with tunable vacancy concentrations, followed by in-situ PDA deposition to construct a direct Z-scheme heterojunction. X-ray photoelectron spectroscopy (XPS) and density functional theory (DFT) calculations reveal that the introduction of S vacancies reduces the work function of CdS, facilitating energy level alignment with PDA and enabling efficient electron transfer from CdS to PDA. By tuning the concentration of S vacancies, the charge transfer efficiency can be maximized. As a result, the photocatalytic H 2 O 2 production rate reaches 2539.5 µmol g −1 h −1 under visible light, and further increases to 4395.5 µmol g −1 h −1 after PDA encapsulation —15.6 times higher than that of pristine CdS. Concurrently, PDA enhances O 2 adsorption and protects S v -CdS from photocorrosion. S v -CdS@PDA exhibited superior photostability compared to S v -CdS after three consecutive photocatalytic cycles. Mechanistic studies suggest that the Z-scheme heterojunction effectively separates electron-hole pairs: electrons in the conduction band of CdS reduce O 2 to ·O 2 − , which is subsequently converted to H 2 O 2 , while holes in the valence band of S v -CdS oxidize water to replenish O 2 . This work provides fundamental insights into engineering charge transfer and stability in sulfide-based photocatalysts.
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CATALYSIS SURVEYS FROM ASIA
·
2026
·
IF 2.5
Shan Yulin,Li Junjie,Li Chao,Bai Zixuan,Li Binglin,Liu Ziwei
Conventional syntheses of tocopheryl acetate rely on strong Brønsted/Lewis acids and energy-intensive conditions. Here we report a visible-light photocatalytic route using graphitic carbon nitride (g-C 3 N 4 ) engineered by precursor control, P/S co-doping, metal loading (Cu, V, Zn, Ni), and nanosheet formation. Structural characterization by SEM and TEM revealed that P/S co-doping and exfoliation produced highly corrugated nanosheets with increased porosity, abundant edge sites, and reduced interlayer stacking. XRD analysis confirmed the preservation of the g-C 3 N 4 framework with slight distortion upon doping, while HRTEM showed lattice disorder and defect formation that are beneficial for charge trapping and transfer. In ethanol/H 2 O 2 under a 40 W lamp, P/S@g-C 3 N 4 affords a 76.26% yield with 99.80% selectivity; no formation occurs in the dark. Screening identifies 5 mg mL −1 substrate, 4 mg catalyst, and 45 °C as optimal, while yields decline above 55 °C. The catalyst is reusable for 20 cycles with slight loss from handling. DRS results showed that the absorption capacity of P/S@g-C 3 N 4 to visible light was significantly higher than that of g-C 3 N 4 . And compared with g-C 3 N 4 , the E g value of P/S@g-C 3 N 4 is significantly narrowed form 2.71 eV to 2.42 eV. Mechanistic analysis indicates P/S sites and heterointerfaces enhance H 2 O 2 activation, oxidize ethanol to acetaldehyde, and channel coupling with a phenoxyl intermediate from tocopherol. This acid-free strategy offers a scalable route to tocopheryl acetate.
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Collagen and Leather
·
2026
·Vol. 8
·期 1
·25
·
IF 10.1
Jiang Qingmiao,Zhou Yuxin,Liu Minghua,Lv Yuancai,Guo Hong,Liu Yifan,Ye Xiaoxia,Shi Yongqian
With the depletion of petroleum resources, biomass has been widely applied as an alternative to petroleum-based feedstocks. In this work, a lightweight tannin-lignin-phenolic carbon foam (TLCF 5−ME ) with excellent smoke suppression was developed. The foam precursor was prepared by substituting 30 wt% of phenol with modified lignin, and tannin was used as a framework filler to reinforce the samples. The effects of lignin, tannin type, including myrica extract (ME), wattle extract (WE), and tannic acid (TA), and addition amount of tannin on the mechanical behavior and smoke suppression of carbon foam were determined, and the mechanism was illustrated. Surprisingly, it was found that the total smoke release of TLCF 5−ME was only 0.39 m 2 /m 2 , which was 97.62% lower than that of pure phenolic carbon foam (CF), and the compressive strength of TLCF 5−ME was 0.32 MPa, which was 33.33% higher than that of CF. In summary, adding modified lignin and ME not only reduced the use of phenol, but also increased the number of aromatic rings and improved the graphitization degree of carbon foam, thereby promoting the formation of compact char layers under combustion, and further effectively inhibiting the smoke production of samples. Graphical
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CELLULOSE
·
2026
·
IF 4.6
Chen Jinghuan,Liu Junjun,Yang Kaiji,Peng Xuanhua,Deng Wangfang,Tarasov Dmitry,Gustafsson Jan,Hu Liqiu,Xu Jiayun,Zhang Hao,Sun Shaofei,Tian Chao,Sun Bo,Xu Chunlin
Microfibrillated cellulose (MFC) has attracted increasing attention as a sustainable reinforcement for polymer composites. However, when incorporated into hydrophobic thermoplastics such as acrylonitrile–butadiene–styrene (ABS), MFC often improves tensile strength but significantly reduces elongation at break. To address this challenge, we designed a surface modification strategy for MFC. Leaf bleached kraft pulp (LBKP) was first carboxyethylated and mechanically fibrillated to produce carboxyethylated MFC (C-MFC), which was subsequently amidated with octadecylamine (ODA) to obtain hydrophobized octadecylamine-modified carboxyethyl MFC (OC-MFC). Composite films of OC-MFC/ABS were fabricated by solution casting followed by hot pressing. The structures and properties of MFC, C-MFC, OC-MFC, and OC-MFC/ABS composites were systematically characterized using laser particle size analysis, FTIR, dynamic water contact angle, tensile testing, thermogravimetric analysis (TGA), and scanning electron microscopy (SEM). The results demonstrated that ODA modification effectively increased the hydrophobicity of MFC, leading to improved dispersion and interfacial compatibility with the ABS matrix. Mechanical testing revealed that the incorporation of 0.5–1 wt% OC-MFC into ABS composite films preserved the tensile strength, while significantly enhancing. Morphological observations further supported the toughening effect of OC-MFC. These findings highlight a practical strategy for toughening ABS through the incorporation of surface-modified MFC, providing insights into the design of high-performance bio-based thermoplastic composites. Graphical
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Nature Communications
·
2026
·
IF 18.1
Yang Wendong,Liu Pei,Wang Linfeng,Jiang Hua,Zhang Shuangbin,Luo Bin,Long Xue,Zeng Yilin,Cai Xuan,Zhang Yifan,Gan Zuoxuan,Ke Huaiyu,Guo Jinhua,Duan Jiangjiang
Iron-chromium redox flow batteries are promising for long-duration energy storage owing to their safety, low cost, and environmental compatibility, but are limited by sluggish chromium(II/III) kinetics and parasitic hydrogen evolution in chromium-based negolytes. Here we re-engineer iron-chromium redox chemistry through chelation-driven molecular design using the strong-field ligand 2,2-Bis(hydroxymethyl)−2,2’,2”-nitrilotriethanol. The ligand reshapes the electronic configurations of iron and chromium centres and tunes their redox potentials, enabling an alkaline iron-chromium redox flow battery with rapid kinetics and suppressed hydrogen evolution. It stabilizes an octahedral hexacoordinate chromium chelate and unlocks an unconventional chromium(III/IV) couple at +0.34 V versus the standard hydrogen electrode, circumventing the Jahn-Teller effects associated with chromium(II/III). Paired with an iron-chelate negolyte based on the same ligand, the cell operates at 1.15 V within the aqueous stability window and remains stable over 500 cycles, achieving 99.0% coulombic efficiency and 75.8% energy efficiency at 100 mA cm −2 (80% of state-of-charge). Together with a projected raw-material cost of $17.02 kWh −1 and theoretical capacity of 68.07 Ah L −1 based on posolyte volume, this work establishes a scalable, cost-effective strategy for grid-scale energy storage.
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Nature Communications
·
2026
·
IF 18.1
Zheng Changran,Ding Qihang,Xu Huimin,He Chengjie,Yang Junyu,Li Yang,Yang Zegui,Xia Bingxuan,Shi Mingming,Fan Jiajie,Yang Bobo,Zou Jun,Ai Xinping
Aqueous hybrid sodium-ion batteries hold promise as next-generation electrochemical storage due to intrinsic safety and low cost. However, they are limited by specific energy and cycle lifespans. Here, we unlock multielectron tellurium redox chemistry in the aqueous system by coupling in situ hypervalent oxidation with selenium solid-solution modulation. In a sodium acetate electrolyte, the Te 4 O 9 2– ↔ Te ↔ Te 2– sequence enables a highly reversible six-electron reaction distinct from conventional tellurium chemistry. Selenium withdraws electron density from neighbouring tellurium, promotes oxidation, stabilizes high-valence intermediates and accelerates Na⁺ diffusion. As a result, Te 0.85 Se 0.15 delivers 95.8% utilization of the theoretical six-electron capacity (~1217 mAh g –1 at 0.1 A g –1 ) and operates for 2000 cycles at 10 A g –1 . Furthermore, a pouch cell achieves an active-material-level specific energy of approximately 114.3 Wh kg –1 at 0.33 A g –1 . These findings outline a practical route to high-energy, high-power, and intrinsically safe aqueous sodium/zinc hybrid batteries for grid-scale deployment.
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ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2026
·
IF 4.1
Li Peng,Yu Hongkun,Lin Kunde
Accurate quantification of sulfide in water depends critically on reliable calibration materials. However, existing calibration materials pose significant challenges for routine sulfide analysis, whether they are in the form of Na 2 S solutions susceptible to atmospheric oxidation or ZnS suspensions lacking physical homogeneity. To address these deficiencies, we developed a series of highly stable ZnS colloids by using zinc acetate, sodium sulfide, and a polymeric stabilizer. Four polymers were demonstrated to be effective, namely, chitosan, hydroxyethyl starch, hydroxyethyl cellulose, and hydroxypropylmethyl cellulose. Under optimized experimental conditions, each ZnS colloid formulation maintained satisfactory homogeneity and stability for over 6 months. Moreover, the colloids exhibit no spectral interference with the widely adopted methylene blue spectrophotometry at around 660 nm and do not cause clogging of online analyzer tubing, suggesting their suitability for instrument self-calibration. Particle size and zeta potential analyses revealed that adding a stabilizer effectively prevented particle aggregation, consistent with predominantly steric hindrance imparted by the adsorbed polymer layers. Collectively, the proposed ZnS colloids represent a promising alternative to conventional sulfide calibration materials for method development, instrument calibration, and data quality control. Graphical abstract
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Nature Communications
·
2026
·
IF 18.1
Guo Likun,Feng Xinjun,Zhang Xingyu,Xu Chao,Liu Wei,Bi Yujia,Qi Qingsheng,Xian Mo,Zhao Guang
Diverse chemicals biosynthesis demand distinct precursor acetyl-CoA and energy inputs, yet strategies balancing carbon atom economy and energy generation for varied products remain scarce. Here, we design an a u t onomous h ybrid en ergy-carbon b a lancing apparatus (ATHENA) to establish a paradigm for redox-driven, dynamically adaptive regulation of carbon conservation and energy synthesis in Escherichia coli . ATHENA features modularization of acetyl-CoA and NADH synthesis pathways for carbon conservation and energy generation, paired with NADH-responsive positive and negative genetic circuits constructed using the BsRex sensor and antisense RNA. This system enables intracellular redox state-dependent rational metabolic flux allocation to balance carbon atom economy and energy generation. Ultimately, ATHENA significantly improves yields and titers of five products with differential acetyl-CoA and energy demands. In the 5-L bioreactor, acetate yield markedly exceeds its native theoretical yield, while that of mevalonate nearly approaches this theoretical upper limit. This work provides a universal strategy for constructing high carbon-yield microbial chassis cells.
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