MOLECULES
·
2026
·Vol. 31
·期 4
·705
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IF 5.1
Yue Gao,Xuan Qi,Junfeng Zhang
A novel polycationic membrane (PCM) was synthesized by the cyclization of polyacrylonitrile (PAN) with m-ethylene diamine, converting the nitrile groups into pyridine units, followed by quaternization with 1-bromobutane. The resulting PCM was further functionalized by loading the photocatalyst, phosphomolybdic acid (PMo), via anion exchange, forming a new type of photocatalytic material, PM-PCM. Under visible light irradiation, the PM-PCM photocatalyst achieved an impressive methylene blue degradation rate of 98%. Additionally, the nanofiber membrane morphology facilitates the efficient recovery of the catalyst, with 98% of the initial degradation efficiency maintained after five photocatalytic cycles. This robust, highly efficient, and recyclable material provides a new approach for catalyst support. To the best of our knowledge, PM-PCM is the first reported photocatalyst of this kind. This cost-effective, functionalized membrane material utilizes solar light as an economical and clean energy source, offering promising potential for sustainable environmental applications.
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Journal of Materials Chemistry C
·
2026
·
IF 5.1
Haoyu Zhao,Guiyong Chen,Yusong Ma,Rongting Guan,Yige Han,Weiwei Xu,Yuhang Liu,Feng Chen
Achieving full-band (2–18 GHz) microwave absorption alongside structural load-bearing capacity remains a formidable challenge. Traditional honeycomb absorbers enhance absorption but often require increased thickness and weight, limiting their practical applicability. To address this, we propose a novel composite gradient honeycomb structure. A gradient in electromagnetic properties is engineered by strategically varying the carbon black (CB) content and distribution within the coating. This creates a continuous gradient in the electromagnetic properties, achieving excellent impedance matching within a wide frequency band. Guided by a CST Studio optimized and closed-loop design framework, we fabricated a 30 mm height sample that achieves a reflection loss (RL) of ≤−10 dB across 2.2–18 GHz. Compared to a uniform absorber, this gradient structure enables broadband absorption with reduced thickness. Critically, the key to the broadband absorption is a multi-scale synergistic mechanism: the gradient architecture prolongs wave propagation within the honeycomb cells and optimizes impedance characteristics while simultaneously enhancing interfacial polarization and conductive loss. This integrated structural-functional design provides a promising pathway for developing lightweight, high-strength, and broadband microwave-absorbing materials.
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MOLECULES
·
2026
·Vol. 31
·期 4
·740
·
IF 5.1
Quan Xiang,Linzhu Zhang,Lu Chen,Ruowen Liang,Renkun Huang,Guiyang Yan
Catalytic systems that couple pollutant degradation with hydrogen evolution have attracted significant attention due to their potential to simultaneously address environmental and energy issues. In this study, an S-scheme heterojunction composed of lamellar polymeric carbon nitride (PCN) anchored with a rod-like cerium metal–organic framework (Ce-MOF) was successfully synthesized via a facile one-step oxidation method, enabling efficient visible-light-driven photocatalytic hydrogen evolution and simultaneous tetracycline degradation. The optimized PCN/Ce-MOF composite delivers a hydrogen production rate of 495.7 μmol g−1h−1and achieves a tetracycline removal efficiency of 78%. Such excellent performance is attributed to the charge transfer mechanism of the S-scheme heterojunction in the PCN-Ce-MOF composite during the reaction process, while retaining the intrinsic redox capabilities of both materials. Meanwhile, mechanistic studies reveal that tetracycline can effectively capture holes during its efficient degradation, inhibit electron–hole recombination, and promote proton reduction to generate hydrogen. This investigation provides valuable insights for the rational design of S-scheme heterojunction photocatalysts, aiming to achieve efficient and stable photocatalytic hydrogen production and synergistic degradation of organic pollutants.
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ADVANCED ENGINEERING MATERIALS
·
2026
·
IF 3.6
Bo Qi,Jie Wang,Mengjuan Wu,Xianghui Hou,Xi Wang,Yuxue Fu
Icing on critical infrastructure causes significant damage and economic losses. Mitigating the issue requires durable icephobic coatings. This study introduces a novel polydimethylsiloxane-based coating, modified with silicone oil and silicon carbide (SiC) fibers to establish an interconnected network. This innovative design notably improved the icephobicity. The icing delay duration increased from 9 s for bare aluminum to 70 s, indicating a higher energy barrier against freezing. The coating exhibited a water contact angle of 128.4°, effectively impeding droplet propagation and improving the thermal efficiency. Additionally, the incorporation of SiC fibers reduced the heterogeneous nucleation sites, thereby enhancing droplet mobility and inhibiting ice formation. The coating demonstrated exceptional mechanical durability, maintaining an ice adhesion strength of 74.8 ± 1.3 kPa with minimal weight loss after 60 icing/deicing cycles. The SiC fiber network effectively mitigated freeze–thaw damage by preventing cracks, ensuring long-term icephobicity. This research provides a practical solution for designing robust icephobic coatings for harsh environments.
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Advanced Optical Materials
·
2026
·
IF 7.2
Yuyang He,Yuting Xu,Yuzhen Wang,Shuai Zhang,Zhiguo Xia
Indium(III)-based hybrid halides are emerging low-dimensional luminescent materials; however, their rigid lattices and d 10 electronic configuration of In 3+ suppress intrinsic self-trapped-exciton (STE) emission, leading to limited photoluminescence quantum yield (PLQY). To address this issue, Sb 3+ is doped into the 0D (Me 2 NH 2 ) 4 InCl 7 host, transforming it from a nearly non-emissive material into a highly efficient warm-white STE emitter. The optimized (Me 2 NH 2 ) 4 InCl 7 :0.2Sb 3+ delivers a near-unity PLQY (∼100%) under 350 nm excitation. Single-crystal structural analysis and theoretical calculations reveal substitutional Sb 3+ at In 3+ sites, inducing locally distorted [SbCl 6 ] octahedra. This Sb 3+ -triggered local lattice distortion strengthens electron–phonon coupling, and it deepens the STE potential well and suppresses non-radiative relaxation pathways, thereby enabling robust broadband STE emission with a microsecond-scale lifetime (4.28 µs), a large Stokes shift (280 nm), and a wide bandwidth (177 nm). This work provides a facile route to realize warm-white emission from a single host lattice based on stable, low-toxicity indium-based hybrid halides.
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JOURNAL OF TEXTURE STUDIES
·
2026
·Vol. 57
·期 2
·e70073
·
IF 3.2
Jingyi Sun,Xiaoming Zhang,Shuxia Wu,Yujuan Xu,Cong Li,Hui Zhou,Baocai Xu
Reducing sodium content compromises the texture and flavor of meat products. This study investigated the combined effects of ultrasonic treatment (UT), yeast extract (YE), and trehalose (TH) on myofibrillar protein (MP) gelation and molecular structure under the low-salt (1.5% NaCl) condition. Compared to low-salt control, the UT-YE-TH treatment markedly enhanced the gel functionality ( p < 0.05). Water-holding capacity (WHC) improved from 69.76% (R) to 85.55% (R-UT-YETH), and gel strength increased from 94.75 to 173.54 g ( p < 0.05). Microstructural analysis showed that the combined treatment generated a more continuous and homogeneous protein network. Circular dichroism revealed a decrease in α-helix content (from 13.6% to 2.0%) and an increase in β-turn (from 21.2% to 27.3%). Intrinsic fluorescence and surface hydrophobicity measurements further confirmed enhanced unfolding and intermolecular interactions, accompanied by elevated total and free sulfhydryl contents. Correlation analysis and principal component analysis (PCA) indicated that increased β-turn fractions and greater hydrophobic exposure were associated with improvements in WHC and gel strength. The combined application of UT, YE, and TH effectively improves MP gelation under the low-salt condition by promoting favorable structural transitions, which provides a practical strategy for producing reduced-sodium cured meat products with enhanced quality.
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POLYMERS FOR ADVANCED TECHNOLOGIES
·
2026
·Vol. 37
·期 3
·e70553
·
IF 3.8
Qinglong Zhang,Wen Zheng,Wangyang Lu,Wenxing Chen
The development of high-performance polybenzoxazole (PBO) materials relies on novel AB-type monomers to overcome challenges in stoichiometric control and enhance material processability. However, significant challenges remain in the molecular structure innovation and efficient synthesis of such monomers. This study successfully developed a novel AB-type self-condensing monomer based on a benzimidazole structure—2-(3-amino-4-hydroxyphenyl)-5-carboxylic acid-1 H -benzimidazole (ACBP). Starting from 3,4-diaminobenzoic acid and 3-nitro-4-hydroxybenzaldehyde, the monomer was efficiently synthesized through cyclization condensation and reduction reactions. This method offered advantages such as simplicity, environmental benignity, and low energy consumption, and achieved a high yield. Experimental results demonstrated that ACBP exhibited excellent storage stability. Furthermore, the monomer was subjected to a programmed temperature-controlled polycondensation reaction in polyphosphoric acid and successfully yielded poly[2,5-(1 H -benzimidazol-2-yl)benzoxazole] (ABPBIO) with an intrinsic viscosity as high as 5.9 dL/g. The structures of the monomer and polymer were systematically characterized using liquid chromatography-mass spectrometry (LC–MS) and nuclear magnetic resonance (NMR), which confirmed their molecular configurations. Performance studies revealed that ABPBIO not only possessed outstanding thermal stability, with 5% weight-loss temperatures ( T 5% ) of 551.6°C in air and 615.2°C in N 2 , and char yields of 44.1% and 76.6%, respectively, surpassing those of similar materials reported in the literature, but also exhibited good gas-phase water adsorption capabilities. Based on these superior properties, the polymer shows promising potential for specialized applications in fields such as firefighting and chemical protection.
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ACS Sustainable Chemistry & Engineering
·
2026
·
IF 7.6
Xiaojie Gao,Huaming Dai
Improper disposal of industrial oily waste is environmentally hazardous, yet it constitutes a valuable resource owing to its higher energy density and hydrocarbon content. To tackle this dual issue, the coconversion of the oily waste and biomass was proposed within a porous media reactor, thereby turning waste into energy. An investigation was conducted on the effects of inlet gas conditions, oil-absorbing material properties, and liquid parameters on the temperature distribution and syngas production. The results indicate that the increased air velocity increases the combustion temperature while reducing the reaction time. And the mole fraction of hydrogen reaches its maximum value at an intermediate velocity of 8 cm/s. When methane is employed as an auxiliary fuel, the heating value of syngas significantly increases, and the hydrogen production decreases. The increasing pore diameter of the felt expands the high-temperature zone, which leads to a higher syngas production. As the felt thickness increases, the mole fraction of hydrogen initially rises before decreasing. Although wool felt increases the combustion temperature and reaction time, the hydrogen production is significantly lower than that of the PP-1. The increase in soybean oil volume reduces hydrogen production, while ethanol exhibits the opposite behavior, achieving a maximum value of 13.7%. At a soybean oil-to-ethanol blending ratio of 2:1, the heating value of syngas is higher. This work provides an efficient solution for the environmental treatment of oily wastes, which also demonstrates significant potential for low-cost hydrogen production.
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Catalysts
·
2026
·Vol. 16
·期 3
·
IF 4.5
Songjie Li,Yuxin Li,Renzhe Jin,Jiajiao Wei,Peng Zhu,Jianmeng Wu,Xiaomei Yu,Jinyou Zheng
Efficient and low-cost electrocatalysts play a crucial role in hydrogen production through the electrolysis of water. Molybdenum (Mo) carbide with a similar electronic structure to Pt was selected, and both α-MoC1−xand α-MoC1−x/β-Mo2C electrocatalysts were successfully fabricated for electrochemical hydrogen evolution. A continuous optimization of the hydrothermal and carbonization conditions was carried out for the preparation of α-MoC1−x. The biphasic molybdenum carbide catalysts were further achieved via vanadium doping with a phase transition of molybdenum carbide from α to β, which increased the specific surface area of the electrocatalyst. It was found that the V-MoxC catalyst obtained at a Mo/V molar addition ratio of 100:5 exhibited the best hydrogen production performance, with a β to α phase ratio of 0.827. The overpotential of V-MoxC at η10decreased to 99 mV, and the Tafel slope reached 65.1 mV dec−1, indicating a significant improvement in performance compared to the undoped samples. Excellent stability was obtained for the as-prepared electrocatalyst for water splitting over 100 h at a current density of 10 mA cm−2.
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ENERGY & FUELS
·
2026
·
IF 6
Shaocong Pang,Jingyi Yu,Tianle Li,Liangliang Yan,Yuxiu An
Extreme high-temperature and high-salinity environments pose severe challenges for the field application of water-based drilling fluids. The thermal degradation of conventional polymer loss control agents is a key factor limiting their performance. The incorporation of nanomaterials offers a novel approach to enhance the high-temperature resistance of polymer loss control agents, making it a research hotspot in this field. In this study, a novel composite additive (DANT/HCM) was developed by physically blending β-cyclodextrin (β-CD) hydrothermal carbon microspheres (HCMs) with a comb-like polymer (DANT). Thermogravimetric analysis showed that DANT/HCM has excellent thermal stability. Structural characterization results reveal that oxygen-containing functional groups on the HCM surface form stable interfacial interactions with polymer segments via hydrogen bonding, conferring unique structural synergistic effects to the system. Scanning electron microscopy images showed that the HCM maintained an intact spherical structure after compositing. Performance tests showed that after aging at 240 °C, the filtration loss of the base mud with 1.5 wt % DANT/HCM was only 9.0 mL, significantly lower than the 20.8 mL of DANT alone. Additionally, this composite material exhibits excellent salt resistance, maintaining a filtration volume of 27 mL even in 30 wt % NaCl drilling fluid. Combined with the zeta potential, particle size distribution, and SEM analyses, the performance enhancement was mainly due to the enhanced thermal stability of the composite system, improved particle dispersion, and the formation of a dense, uniform filter cake structure. This study achieves highly efficient filtration loss reduction by introducing thermally stable, nanosized, water-based, thermally carbonized microspheres and combining them with long-chain comb polymers, thereby forming a unique synergistic loss reduction mechanism. It provides a theoretical basis and practical reference for the development of high-performance, high-temperature-resistant filtration loss reduction additives suitable for ultradeep wells and high-temperature environments and has a good prospect for engineering applications.
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ACS Applied Electronic Materials
·
2026
·
IF 4.7
Yinghui Wang,Weimin Xia,Biao Guan,Jing Li,Chengmin Hou,Xiaofang Zhang
Nonlinear dielectric polymers for high-power density capacitors generally possess a high dielectric constant (εr), a large breakdown electric field (Eb), but a large dielectric loss (tan δ) due to the relaxation of high polar dipoles. To address the inherent trade-off between dielectric response and loss, we propose a low polarity polystyrene-4-vinylpyridine (P(S-r-4VP)) multipolymer by incorporating a 4-vinylpyridine (4VP) into polystyrene (PS) using conventional emulsion polymerization. Interestingly, compared to pure PS, the π-electron density of P(S-r-4VP) is significantly improved for the addition of functional 4VP unit, thereby promoting the strong electronic polarization response under an electrical field. As such, εr and Eb of the P(S-r-4VP) films increase with molar content of 4VP, and reach to 3.7 at 100 Hz and ∼550 MV/m, respectively. Notably, the P(S-r-4VP) copolymer exhibits a considerable discharged energy density (Ue) of 3.43 J/cm3 under an electrical field of 500 MV/m. Thus, this work offers valuable insights for the application of polystyrene-based polymers in dielectric energy storage areas.
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ENERGY & FUELS
·
2026
·
IF 6
Junwei Liao,Jiayu Wu,Shuting Jiang,Mingsi Wang,Yinyan Kong,Guanhua Shen,Jin Tan,Lianfen Chen,Minglei Lu
The development of biomass-derived fuels presents a promising solution for mitigating the severe carbon emissions associated with fossil fuels. A key strategy involves the direct refining of aqueous-phase bioethanol into higher alcohols, which serves as key precursors for diesel blendstocks and biojet fuel. Herein, to enable the direct upgrading of aqueous ethanol, we developed carbon-encapsulated Ni nanocatalysts (Ni@C) with water resistance by pyrolyzing organic precursors under acid–base regulation. The catalytic coupling yields 46.5 C-mol % of higher alcohols, of which C4–C7 and C8–C16 alcohols constitutes 56.9% and 35.2% in product selectivity, respectively. Excellent miscibility with diesel is exhibited by C4–C7 alcohols across a wide range of blending ratios. Furthermore, hydrodeoxygenation of C8–C16 alcohols provides a direct route to biojet fuel. Results from experiment and characterization demonstrate that acid–base regulation effectively tunes the local electronic structure and carbon defects on the Ni@C nanocatalyst surface. The proposed approach allows for precise modulation of the dehydrogenation, aldol condensation, and hydrogenation steps in the Guerbet reaction pathway, which suppress carbon chain scission and enhance the yield of higher alcohols. Overall, this research offers a novel and feasible strategy to the sustainable synthesis of higher alcohols from bioethanol, producing products directly applicable as blending components and biojet fuel precursors.
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