ACS Applied Materials & Interfaces
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2026
·Vol. 18
·期 35
·47618-47628
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IF 7.8
Zhang Zhao,Li Renjie,Ding Zhao,Wang Sa,Du Aoxuan,Wang Dan,Xie Wei
The development of efficient and reversible ammonia (NH 3 ) adsorbents is crucial for advancing ammonia fuel cell technology. Key challenges in the ammonia adsorption–desorption process include achieving high uptake/release efficiency, favorable kinetics, and stable cycling lifetime. Herein, we report a strategy to prepare high-performance ammonia adsorbents by partially etching metal–organic frameworks (MOFs) with tannic acid (TA). Partial etching by protonated TA not only exposes metal active sites but also chelates metal ions, significantly enhancing both the adsorption capacity and the stability during adsorption–desorption cycles. This strategy retains the high specific surface area of the micropores and the chelating functional groups while alleviating premature pore blockage caused by capillary condensation of ammonia on the material surface, thereby improving adsorption kinetics. The partially etched ZIF-67 achieves a reversible capacity as high as 58 mmol g –1 at 298 K and 7 bar, theoretically corresponding to a hydrogen content of 7.5%. The generated hierarchical pore network facilitates ammonia desorption, reducing the temperature and energy required for regeneration, with complete desorption achieved at 364 K. Moreover, the partially etched MOF exhibits excellent ammonia adsorption selectivity, offering a new approach for the purification of industrial exhaust gases. In situ infrared spectroscopy and theoretical calculations reveal that the enhanced adsorption arises from weak chemisorption, benefiting from an increased density of adsorption sites within the engineered pore environment. This strategy provides a new avenue for designing integrated, efficient, and safe systems for ammonia fuel storage and release.
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EUROPEAN POLYMER JOURNAL
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2026
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IF 6.8
Panpan Li,Yuhao Wang,Yifan Pian,Le Zhang,Jianyu Zhao,Zhijian Wang,Jiping Yang
Thermal protection materials for high-speed aerospace vehicles require a combination of excellent heat resistance, mechanical reliability, and lightweight characteristics. In this work, epoxidized hollow glass fibers (HGF) were incorporated into an epoxy silicone resin/phenolic resin (ESR/PR) hybrid resin matrix to overcome the intrinsic brittleness and high density of conventional phenolic-based composites. The successful grafting of epoxy functional groups onto the fiber surface enables strong interfacial bonding through co-crosslinking reactions with the ESR/PR matrix. Meanwhile, the hollow structure of HGF reduces density and provides intrinsic thermal insulation. The optimized ESR/PR-15HGF composite exhibits a tensile strength of 50.4 MPa (12.5 % improvement compared to ESR/PR matrix), elongation at break of 3.2 %, and a high specific strength of 3.97 × 10 4 m 2 /s 2 , achieving superior performance at lower filler content compared to solid glass fiber systems. Thermogravimetric analysis further reveals enhanced thermal stability, with a higher decomposition temperature (428 °C) and increased char yield (78.6 %). These improvements arise from the synergistic effects of enhanced interfacial interactions, fiber reinforcement, and hollow structure-induced thermal insulation, offering a promising strategy for advanced lightweight thermal protection materials.
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Food Chemistry-X
·
2026
·
IF 9.2
Weiyi Xu,Yutong Meng,Fan Yu,Huanfeng Ye,Xuejiao Xu,Jie Chen,Xianrui Liang,Sheng Fang
This study evaluated Osmanthus fragrans fruit (OFF) peel as a potential source of anthocyanin-based natural colorants. Anthocyanins were extracted using acidified ethanol and purified by macroporous resin adsorption, yielding a pigment-rich extract with a recovery of 10.4 ± 0.2% from dried peel. HPLC–MS/MS analysis indicated that cyanidin-3-O-rutinoside (C3R) was the predominant anthocyanin in the extract. The molar absorptivity of C3R was experimentally determined to enable more accurate quantification of C3R-rich systems. The purified extract exhibited typical pH-dependent color behavior, maintaining a stable red coloration under acidic conditions (pH 2.0–4.0). Thermal stability experiments showed that C3R degradation was strongly influenced by temperature and pH, and the degradation behavior followed first-order kinetics. In addition, the extract displayed measurable antioxidant capacity in DPPH and FRAP assays. These results demonstrate that O. fragrans fruit peel is a promising source of C3R-rich anthocyanins with potential applications as natural colorants in acidic food systems.
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TALANTA
·
2026
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IF 6.7
Wei Zhang,Jinhui Wang,Jialu Xu,Yulong Xu,Haiyan Li,Yujun Jiang
The environmental persistence and inherent biodegradation resistance of pesticide residues pose a serious threat to ecosystems and human health, necessitating the development of efficient monitoring strategies. Herein, we decipher the fluorine-fluorine (F···F) interaction within an AIE-active, trifluoromethyl-functionalized covalent organic framework (PEFA-COF) and exploit this molecular recognition motif for the selective detection of trifluralin (TFR). Benefiting from abundant trifluoromethyl moieties and superior luminescence properties, the PEFA-COF enables specific TFR recognition through a synergistic interplay of electrostatic forces, hydrogen bonding, and F···F interactions. This recognition event triggers a pronounced fluorescence quenching response via the internal filtration effect (IFE), facilitating highly sensitive and selective TFR quantification. The constructed PEFA-COF-based fluorescent sensing platform was successfully validated in complex water and milk matrices, achieving an excellent fluorescence quenching coefficient and a detection limit as low as 0.06 μmol/L. Collectively, this work not only deciphers the critical role of F···F interaction in pesticide recognition but also advances the function-led design of AIE-active COFs toward practical and robust pesticide residue monitoring in food supply chains.
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MICROPOROUS AND MESOPOROUS MATERIALS
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2026
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IF 4.5
Gan Ye,Weixue Zhang,Mian Xie,Wei Zou,Xingye Zeng,Hanlu Wang
A novel Ti-BTC with a mesoporous structure and uniformly dispersed Ti-OH sites was successfully synthesized. • Ti-BTC exhibits outstanding ODS activity; 99.5% of sulfur (1000 ppm) can be oxidized at 40 °C within 20 min. • The ODS activity of Ti-BTC at 40 °C reaches 52.4 mmol h −1 g −1 , exceeding that of most previously reported Ti-MOFs. • DFT results reveal that OH anchored on Ti sites react with H 2 O 2 to form Ti-OOH species that dominate ODS efficiency. • The mesoporous architecture enhances the accessibility of sulfur to Ti-OOH active sites and promotes rapid mass transfer. Desulfurization represents a pivotal process to produce ultraclean fuels, yet the design and fabrication of advanced materials to enhance desulfurization efficiency continues to pose significant challenges. Herein, a novel mesoporous titanium-based organic frameworks (Ti-BTC) was successfully synthesized via a solvothermal route. The optimized Ti-BTC exhibits outstanding oxidative desulfurization (ODS) performance, enabling the complete oxidation of various sulfur-containing compounds (1000 ppm sulfur) into the corresponding sulfones at 30 °C within 14 min or at 50 °C within 3 min with H 2 O 2 /sulfur (O/S) molar ratio of 5. Notably, even when molar ratio of O/S is reduced to 2.5, 99.5% of sulfur species are oxidized at 40 °C within 20 min. The ODS activity of Ti-BTC at 40 °C attains 52.4 mmol h −1 g −1 , surpassing most previously reported Ti-containing organic materials. Density functional theory calculation and comprehensive characterization results demonstrate that Ti-OH group anchored on vacancy Ti sites readily react with H 2 O 2 to generate peroxo-titanium intermediate, which efficiently oxidize pre-adsorbed sulfur and thus determine the overall ODS efficiency. Additionally, the mesoporous structure of Ti-BTC improves the accessibility of sulfur to in-situ-generated Ti-OOH species and facilitates rapid mass transfer, which synergistically enhances the catalytic performance. Download: Download high-res image (496KB) Download: Download full-size image
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FOOD CHEMISTRY
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2026
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IF 10.4
Catarina Meliana,Michelle Tien Tien Tan,Hwei-San Loh,Cheng Heng Pang,Sze Shin Low
Ratiometric biosensor overcomes challenges of single-signal biosensors. • Dual-electrode design ensures self-calibration and compensates for errors. • Achieves a low detection limit (0.004 mM) and high accuracy (>97.29%). • Higher recovery compared to the Nash assay in real food matrices. • Demonstrates excellent reproducibility in a complex food matrix. Global food safety requires reliable biosensors in complex matrices. Yet, conventional single-signal electrochemical biosensors suffer from high inter-electrode variability (RSD <12.14%) and low accuracy (<87.84%) due to common-mode signal fluctuations. This study presents a ratiometric biosensor with a dual-electrode design that enables calculation of the current ratio (I WE2 /I WE1 ) between a formaldehyde dehydrogenase-functionalized sensing electrode and an inert graphene reference to mitigate systemic fluctuations. This self-calibrating configuration reduced variability (RSD of 6.92%), improved accuracy (>97.29%), and minimized interference effects (from 7.54% to 1.52%). Spanning a linear range of 0.02–0.50 mM with a LOD of 0.004 mM, the biosensor achieved 97.22–103.87% recovery in coffee samples (RSD = 0.21%). Validation against the Nash assay showed strong correlation (R 2 = 0.995) with comparable accuracy at 0.10–0.50 mM concentrations, yet up to nine-fold higher accuracy at 0.02 mM ( p < 0.05), confirming its superior suitability for practical application in food safety monitoring. Download: Download high-res image (125KB) Download: Download full-size image
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FOOD CHEMISTRY
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2026
·
IF 10.4
Ziteng Huang,Yaru Li,Yuyang Hu,Qiankun Xu,Danya Li,Juzhou Zhang,Xianbiao Wang
Friedel–Crafts acylation yields β-diketone polymer superior to Claisen condensation. • The probe exhibits a vivid green-to-blue shift and intensity enhancement with Al 3+ . • Conformation restriction by Al 3+ coordination enables fluorescence change. • Dual-mode sensing enables both visual screening and precise quantification. • Results in wheat food samples show high consistency with standard ICP-MS methods. Aluminum additives in flour-based foods pose safety concerns and require rapid monitoring. This study presents a high-performance β-diketone main-chain polymer fluorescence sensor synthesized via Friedel–Crafts acylation for specific aluminum detection. This preparation method yielded a polymer with superior sponge-like porosity and extended π-conjugation. Upon Al 3+ coordination, the probe exhibits a distinct fluorescence transition from dim green to brilliant deep blue, enabling visual identification. The response follows a positive cooperative logistic model, achieving a limit of detection of 1.78 μmol/L. Mechanistic studies attribute signal enhancement to a synergistic effect, where coordination restricts the conformational relaxation of the polymer backbone to suppress non-radiative decay while simultaneously increasing radiative oscillator strength. Validated in wheat derivatives with a calibration strategy, the method achieved quantitative results consistent with inductively coupled plasma mass spectrometry. This work highlights the value of backbone-integrated recognition sites and conformational restriction for sensing. A β-diketone main-chain polymer fluorescence sensor addresses the challenge of monitoring aluminum in wheat-based foods. The probe exhibits a positive cooperative logistic response to Al 3+ , characterized by a vivid green-to-blue emission shift. By leveraging a coordination-induced restriction of main-chain conformational relaxation mechanism, the sensor achieves excellent selectivity and sensitivity, allowing for both naked-eye inspection and precise instrumental quantification in real samples. Download: Download high-res image (140KB) Download: Download full-size image
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CORROSION SCIENCE
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2026
·
IF 10.3
Yue Liu,XiangLi Shen,ZhiHui Xie,Xiaoqiang Fan
Simultaneously enhancing the corrosion resistance and mechanical durability of epoxy (EP) coatings remains a substantial challenge for long-term safe-guarding of metallic structures in aggressive environments. Covalent organic frameworks (COFs) have emerged as promising protective nanofillers, but their applications predominantly rely on physical barrier effects, leaving the potential of their functional pore channels for metal-ion coordination largely unexploited. Herein, inspired by the intrinsic metal-ion adsorption capability of COFs, we reversely harnessed their functional pore channels to immobilize cerium cations through a pore-confinement and coordination strategy. This approach led to the construction of rare-earth functionalized COFs, namely spherical Ce@TATP and high-aspect-ratio Ce@TADM, which integrate both passive and active protection functions. The high-aspect-ratio TADM, owing to its highly ordered pore channels and abundant nitrogen/oxygen-rich coordination sites, enabled efficient cerium anchoring. The synergistic integration of the high-aspect-ratio TADM barriers and pH-responsive cerium inhibition effectively impeded the transport of corrosive species. The resulting coating exhibited a charge-transfer resistance of 1.29 × 10 7 Ω·cm 2 and a corrosion protection efficiency of 88.5% after 4 weeks of immersion in 3.5 wt% NaCl solution. More importantly, cerium coordination achieves mechanical reinforcement of the composite coating and improves its load-bearing capability and resistance to plastic deformation, as evidenced by the H 3 / E r 2 value rising by 23.3% and 43.0% compared with TADM/EP and pure EP, respectively. Combined with the layered nanoarchitecture of TADM, such coating reinforcement lowers the wear rate by 65.04% relative to pure EP. This work establishes the structure-property relationship linking COF nanoarchitectures, cerium incorporation and multifunctional protective performance, providing a novel strategy to construct advanced anti-corrosion and anti-wear coatings.
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CHEMICAL ENGINEERING SCIENCE
·
2026
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IF 5.1
Kao Chen,Huailiang Li,Jingyi Chen,Annan Wang,Weiwei Zhu
Highly recoverable and stable heterogeneous catalysts are critical for peroxymonosulfate (PMS)-based advanced oxidation processes (AOPs). This work addresses the difficult separation and metal leaching issues of conventional powdered metal–organic frameworks (MOFs) by constructing a self-supporting Co-MOF@chitosan (Co-MOF@CS) composite membrane. Through in situ reconstruction during PMS activation, the low-crystallinity Co-MOF precursor transforms into an amorphous CoO(OH) nanolayer on the membrane surface. The reconstructed active phase anchors firmly on the porous CS substrate, thereby enabling efficient PMS activation by facilitating rapid electron transfer and providing abundant surface active sites. The Co-MOF@CS membrane exhibited excellent catalytic performance, degrading > 96% of the methylene blue (MB) and ∼70% of sulfadiazine (SDZ) after five consecutive cycles. Notably, the degradation efficiency increased slightly after multiple cycles due to continuous exposure of CoO(OH) active sites. The Co species effectively anchored onto the CS matrix through strong coordination, contributing to extremely low cobalt leaching (0.05 to 0.06 mg/L) and outstanding long-term reusability. Radical quenching and electron paramagnetic resonance (EPR) analyses revealed superoxide radicals (O 2 •− ) and singlet oxygen ( 1 O 2 ) as the dominant reactive species. This work elucidates the dynamic self-activation of low-crystallinity Co-MOFs in AOPs while providing a green and sustainable solution to secondary pollution caused by powdered nanocatalysts during water treatment.
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ANALYTICA CHIMICA ACTA
·
2026
·
IF 6.1
Tianhong Liu,Ziyi Xu,Shuiyuan Zhang,Long Yu,Junting Mo,Mingtai Sun,Suhua Wang
Background Trace water contamination in organic solvents severely hampers chemical synthesis, pharmaceutical manufacturing, and electronic device fabrication; however, existing detection methods lack portability, adequate sensitivity, or stability. While MOF-based fluorescent sensors show promise, most are limited by single-signal outputs, weak anti-interference capability, and poor solvent tolerance. Results To address these challenges, we report an amino-functionalized europium-doped zirconium MOF (Eu@MOF-NH 2 ), synthesized via a one-step solvothermal method, serving as a robust ratiometric fluorescent probe for trace water detection. The material exhibits dual emissions: ligand-based (435 nm) and Eu 3+ -centered (614 nm). Upon water exposure, strong hydrogen bonds with the ligand activate intramolecular charge transfer (ICT) to intensify the blue emission. Concurrently, high-frequency O–H vibrational coupling quenches the red emission by blocking ligand-to-metal energy transfer, causing a rapid (<30 s) pink-to-blue visual transition. The fluorescence intensity ratio (I 435 /I 614 ) demonstrates excellent linearity with water content (0–10% v/v) and achieves ultralow limits of detection in ethanol (0.1643%), THF (0.0311%), methanol (0.3355%), and acetonitrile (0.0148%). Furthermore, this probe maintains consistent sensing performance across 11 diverse organic solvents with highly varying polarities. Integrated with a smartphone-assisted RGB colorimetric platform based on the blue-to-red intensity ratio, Eu@MOF-NH 2 enables portable, on-site, and quantitative visual detection. Significance This work overcomes the traditional limitations of sensitivity and stability, providing reliable material design and sensing strategies for industrial trace water monitoring and quality control.
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JOURNAL OF CHROMATOGRAPHY A
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2026
·
IF 4
Zongkai Li,Nuo Xiao,Weihua Liu,Ying Zhao,Qianqian Wang,Guoxiu Zhang,Menglu Fan,Chun Wang,Qiuhua Wu
An amino-functionalized covalent organic framework was synthesized. • NH 2 -PyCOF exhibited enhanced hydrophilicity and multiple interaction sites. • NH 2 -PyCOF exhibited superior adsorption ability to neonicotinoid insecticides (NTIs). • A SPE-HPLC-MS method was built to detect NTIs in honey, beverage, and water. An amino-functionalized pyrazine-based highly conjugated covalent organic framework (NH 2 -PyCOF) was synthesized via a post-synthetic modification strategy and applied as an adsorbent for the solid-phase extraction (SPE) of four neonicotinoid insecticides (NTIs) in honey, beverage and water samples. NH 2 -PyCOF combines a highly conjugated pyrazine skeleton with multiple amino sites, which not only enhances its hydrophilicity but also provides multiple interaction sites, including hydrogen-bonding and π-π stacking sites. When NH 2 -PyCOF-based SPE was coupled with HPLC-MS, the method demonstrated low detection limits (0.025–0.10 ng mL -1 for peach beverage samples, 0.01–0.03 ng mL -1 for water samples and 0.20–0.80 ng g -1 for honey samples) and satisfactory recoveries (86.0%-111%) with relative standard deviations below 8.4%. The NH 2 -PyCOF-SPE-HPLC-MS method exhibits exceptional sensitivity and reproducibility, providing a reliable and efficient approach for monitoring trace NTI residues in complex matrices. Download: Download high-res image (322KB) Download: Download full-size image
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CHEMICAL ENGINEERING JOURNAL
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2026
·
IF 12.5
Yufei Yong,Lianghao Jia,Zhangchi Chen,Tao Xiang,Shaobing Zhou
Antifouling Janus hydrogel with an asymmetric architecture is fabricated and the interface is enhanced by annealing. • The Janus hydrogel exhibits a superior signal-to-noise ratio of 31 dB compared to commercial alternatives (22 dB). • The Janus hydrogel can maintain a robust 25 dB even after a 30-day immersion period. • By integrating a GBDT model, the acquired signals support autonomous muscle fatigue classification with 92.6% accuracy. Water-induced adhesion failure and swelling compromise the viability of conventional hydrogel electrodes for long-term muscle fatigue monitoring under dynamic and humid conditions. To address these limitations, we report an anti-swelling Janus hydrogel with an asymmetric architecture that simultaneously ensures robust interfacial adhesion and high signal fidelity. The design comprises an adhesive layer of acrylic acid (AA) and lauryl methacrylate (LMA) copolymer with incorporated poly(vinyl alcohol) (PVA) and a non-adhesive layer of pure PVA. Freezing initiates PVA microcrystallization to form the primary network, while subsequent heat annealing further densifies microcrystal formation at the interface. Crucially, the synergistic hydrophobic association and dense physical cross-linking restrict the swelling ratio to below 7% to prevent network dilution. The dynamic hydrogen bonding yields a robust interfacial adhesion of 67 kPa on skin to minimize motion artifacts. This dual stability directly translates into an exceptional initial signal-to-noise ratio (SNR) of 31 dB (versus 22 dB for commercial alternatives) and a sustained SNR of 25 dB even after a 30-day immersion period. When coupled with a Gradient Boosting Decision Tree algorithm, the acquired signals support autonomous muscle fatigue classification with 92.6% accuracy. This anti-swelling Janus strategy establishes a reliable material-algorithm interface for long-term wearable electromyography. Download: Download high-res image (131KB) Download: Download full-size image
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危险品化学品经营许可证（带存储）