Materia-Rio de Janeiro
·
2025
·
IF 1.2
Zhao Zhenjiang,Guo Pingan,Bian Yi,Zhao Xue,Yang Mingxu,Wei Xiaoda,Lv Rui Ling,Yi Wenkang,Zhou Wenlong
To improve the interfacial bonding properties of carbon fiber-reinforced polymer (CFRP) composites, this study proposes an effective surface modification strategy for carbon fibers. A CF-KH560-PGO hybrid reinforcement was fabricated through chemical grafting, employing γ-glycidoxypropyltrimethoxysilane (KH560) as a coupling agent to bridge the carbon fibers (CF) with polyethyleneimine (PEI)-functionalized graphene oxide (GO). The presence of lamellar PGO has been observed on the surface of modified carbon fibers. The presence of the –NH2 peak, in conjunction with the C–N peak, on the surface of the carbon fibers, served to verify the grafting of PGO. The synergistic effect of PGO and KH560 significantly enhanced the surface wettability of carbon fibers. This study systematically investigates the mechanical performance of composites fabricated through different CF modification approaches, along with the underlying interfacial reinforcement mechanisms. The modified carbon fiber composites exhibited remarkable tensile strength (669.7 MPa) and interlaminar shear strength (60.41 MPa), representing 49.89% and 20.36% improvements respectively over desized carbon fiber composites. Grafted PGO can provide abundant amino groups for chemical bonding with epoxy resins. That KH560 and PGO increased the thickness of the interfacial transition layer, thereby enhancing the load transfer at the composite interface.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Shuting Wei,Dan Yang,Renquan Guan,Peng Xu,Yuxin Wang,Yingmin Teng,Aicen Li,Junkai Zhang,Huaqiao Tan,Lili Wang,Zheng Lou,Wenjuan Zhang,Zhao Zhao
Hydrogen chloride (HCl) gas is widely generated in industrial processes and poses significant risks to human health and ecosystems. Therefore, highly efficient and sensitive sensors are essential for its detection. Among existing HCl gas sensors, chemiresistive sensors based on metal oxide semiconductors (MOSs) have gained considerable interest owing to their structural simplicity, low cost, and ease of miniaturization. However, these sensors often suffer from limitations such as slow response, low selectivity, and high operating temperatures. In this study, we successfully synthesized gas-sensing materials enriched with crystal defects and bulk strain through high-pressure torsion (HPT) technology. These modifications provide additional active sites for gas adsorption and reaction, and induce crystal field distortion that tunes the electronic structure, ultimately enhancing the HCl sensing performance. The optimal sample, ZnO-300R 3/2 , exhibited a response value of 213.79 % toward 100 ppm HCl gas, which is 14.6 times higher than that of the pristine ZnO. Combining spectroscopic analysis with density functional theory (DFT) calculations, we clarified the synergistic mechanism between electronic band structure modulation and surface lattice oxygen activation. This work provides valuable insights for designing novel room-temperature gas sensors and promotes a deeper understanding of surface lattice oxygen-mediated sensing mechanisms.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2025
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IF 4.6
Xiaoya Kou,Shiyi Yang,Jing Zou,Siying Chen,Jianying Wu,Bo Sun,Zhongda Yan,Dezhao Liu,Haoqiang Tan
Recently, increasing attention had been paid for using peracetic acid (PAA) as an efficient disinfectant or a strong oxidant in wastewater treatment. In this study, a rapid and simple spectrophotometric method for the selective determination of PAA in aqueous solution was established, based on the oxidative decolorization of rhodamine B (RhB) by reactive species generated from the combination of PAA and Co(II). Under the optimized conditions (20 μmol L −1 RhB, 1.0 mmol L −1 Co(II), pH = 5.0 buffered with 10 mM acetate acid buffer, and reaction time = 40 s), the extent of RhB decolorization at the characteristic wavelength of 552 nm was found to be proportional to the concentration of PAA in the aqueous solution. A strong linear correlation was observed between the consumption of RhB and the concentration of PAA in the range of 0.25–25 μmol L −1 (R 2 = 0.9991), and the sensitivity for PAA was as high as 2.99 × 10 4 M −1 cm −1 . The RhB spectrophotometric method is effectively tolerant to interference the coexistent H 2 O 2 in PAA solution, the common coexisting species in practical water samples (KCl, MgSO 4 , NaNO 3 , NaHCO 3 , DCF and humic acid) and even the added reducing substances such as hydroxylamine and ascorbic acid. As a selective colorimetric agent, RhB is resistant to interference from reducing substances and water bodies, enabling accurate determination of PAA concentration in actual water environments. Overall, the RhB spectrophotometric method could be used as an alternative method for the cheap, rapid and selective determination of PAA in water samples.
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PubMed
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Fermentation-Basel
·
2025
·Vol. 11
·期 11
·609
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IF 3.3
Run Huang,Ying-Ying Xie,Xin-Yu Liu,Huai-Hui Yi,Hao-Jie Xu,Liang Zhang,Hui-Mei Cai,Zheng-Quan Liu,Da-Xiang Li,Yun-Qiu Yang,Xiao-Chun Wan,Chuan-Yi Peng
Brick tea is a type of post-fermented food that involves microorganisms. Long-term consumption of brick tea exposes consumers to high fluoride levels, which can adversely affect their health. This study explored the feasibility of selective defluorination of Qingzhuan brick tea through membrane separation technology, and pilot production was conducted to produce defluorinated instant brick tea. The concentration of tea polyphenols increased by more than 10 times after nanofiltration, demonstrating the high selectivity of nanofiltration membranes toward fluoride. Defluorination trends were studied at different initial material concentrations (0.5–4%) and operating pressures (0.1–0.5 MPa) under cyclic defluorination. Defluorinated instant brick tea products were also industrially prepared using 300- (DF-300) and 1000-Da (DF-1000) membranes, followed by vacuum freeze-drying. The DF-1000 and DF-300 products exhibited a defluorination rate of 51.46% and 67.96%, respectively. The products have excellent characteristics in terms of color, aroma, and flavor quality, as well as solubility. Gas chromatography–mass spectrometry indicated that the volatile components in the defluorinated instant brick tea were slightly different from those in the original tea, but the key aroma and flavor characteristics of the defluorinated brick tea remained unchanged. Membrane separation provides technical support for the large-scale production of low-fluoride post-fermented tea.
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MICROCHEMICAL JOURNAL
·
2025
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IF 5.1
Yanghong Dong,Qian Wang,Ying Zhang,Yaru Huang,Mingrong Cui,Xiaoqiang Chen
This study employed a choline chloride-acetic acid-based natural deep eutectic solvent (NADES-1) combined with ultrasound-assisted extraction to recover polyphenols and flavonoids from Hippophae gyantsensis leaves. The statistically validated optimal conditions included 32 % water content, 24:1 ( v / w ) liquid–solid ratio, and 53 °C extraction temperature. This three-parameter synergistic optimization approach maximized the yield of the target active compounds. Under these conditions, the yields reached 108.36 ± 0.11 mg gallic acid/g for total phenolics (TP) and 67.12 ± 0.53 mg rutin/g for total flavonoids (TF), with an antioxidant capacity of 82.5 ± 1.45 mg vitamin C equivalents/g, significantly outperforming conventional 60 % ethanol extraction. The purified NADES-1 extract demonstrated remarkable antioxidant activity: 2,2-Diphenyl-1-picrylhydrazyl (DPPH) IC 50 = 57.63 ± 1.38 μg/mL, Lipid Peroxidation (LPO) IC 50 = 53.57 ± 0.32 μg/mL, and antimicrobial effects: Minimum Inhibitory Concentration (MIC) against Escherichia coli = 0.63 mg/mL), surpassing those of ethanol-purified extracts. Pearson correlation analysis revealed strong positive associations between TP / TF contents and bioactivities, suggesting these compounds may serve as key contributors to the observed effects.
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Food Chemistry-X
·
2025
·
IF 8.2
Xiaolin Li,Jiqing Zhong,Junhui Zhou,Yanan Wang,Hui Huang
Stauntonia obovatifoliola subsp. urophylla is a promising oilseed crop. This study first systematically evaluated its seed oil including physicochemical properties, fatty acid profile, and volatile compounds, and genes related to carotenoid and fatty acid biosynthesis. The oil had high carotenoid content (77.49 ± 1.11 mg/100 g), moderate iodine value (82.91 ± 2.86 g/100 g), low acid and peroxide values, and antioxidant/antimicrobial activities. Mature seeds contained unsaturated fatty acids (UFAs, 66.68 %), mainly oleic acid (30.93 %) and linoleic acid (21.00 %). A distinctive C19:1N9T component was also detected. Twenty-eight volatile compounds including eight terpenes, eight alkanes, five alcohols, five arenes and two aldehydes. Notably, during rapid oil accumulation phase (July to August), fatty acid biosynthesis genes were elevated, whereas carotenoid synthesis genes were suppressed, suggesting substrate competition. These findings offer help in purposefully exploitation and utilization of S. obovatifoliola seeds oil in food, cosmetics and pharmaceuticals.
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MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Yuanyuan Xu,Mengyao Jiang,Jianshan Bai,Yinhui Yi,Gangbing Zhu
In the last few years, many interesting electrochemical methods have been developed for the quantitative detection of perfluorooctane sulfonate (PFOS, a “forever chemical”), whereas they generally require complex electrode modifications coupled with just a single signal. For effectively improving the detection efficiency and reliability, herein we firstly designed and prepared an iron-based MOF (MIL-88B) functionalized with fluorine (F) nanozyme (F-FeMOF) which can offer prominent peroxide-like activity and selectively recognize the PFOS target. Meanwhile, the nanozyme activity of F-FeMOF would be inhibited in the presence of PFOS. By using o -phenylenediamine as the catalytical substrate and its product 2,3-diaminophenazinc in homogeneous solution as the signal source which can make the color of sensing system change and offer reduction current, a homogeneous electrochemical, colorimetric and smartphone tri-model sensing strategy was then proposed to detect PFOS upon integrating with Image J software. Under the optimized detection conditions, the as-proposed sensing platform could offer prominent analytical performances (10–1000 nM for the linearity and 0.004 nM for the detection limit). In addition, the related sensing and catalytical mechanisms were investigated in detail, and the application in real water samples were confirmed. We expected this tri-mode sensing platform based on F-FeMOF nanozyme could open up a new avenue for the PFOS analysis.
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NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
Zhenzhong Li,Haohao Chang,Zhiwei He,Zhongyang Su,Mingjian Duan
A novel and efficient immobilized Au nanoparticle catalyst, Au-SH/SO3H-COP, has been synthesized via the in situ reduction of Au3+ ions by thiol groups within a thiol-functionalized covalent organic polymer (SH-COP). This approach leverages the thiol groups as intrinsic reductants, eliminating the need for external agents. Simultaneously, during Au nanoparticle formation, anchored sulfonic acid (–SO3H) sites are generated, which function as Brønsted acid co-catalysts to synergistically enhance catalytic performance. Characterization results confirmed the formation of uniformly dispersed Au nanoparticles with a narrow size distribution centered at 2–3 nm. The covalent anchoring of nanoparticles to the SH-COP support through unreacted thiol groups effectively prevents aggregation and leaching. For the model hydration of phenylacetylene, Au-SH/SO3H-COP exhibited excellent catalytic activity, achieving 92% yield without additional acid additives. Moreover, it displayed broad substrate compatibility across diverse alkynes (aryl and aliphatic), affording 84–94% yields. The catalyst also showed high recyclability, retaining 89% yield after six cycles with negligible Au leaching, underscoring its robustness and reusability.
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ULTRASONICS SONOCHEMISTRY
·
2025
·
IF 9.7
Yang Song,Xinyu Wang,Tianyu Zhang,Jincheng Sha,Cuntang Wang,Chunli Song
In this study, the effect of ultrasonic treatment on Soy protein isolate (SPI)-Fenugreek gum (FG) emulsions was investigated to improve the stability and physicochemical properties of SPI-FG emulsions, as well as to expand their application scope in the food field. The microstructure was characterized using atomic force microscopy (AFM), confocal laser scanning microscopy (CLSM), and fourier transform infrared spectroscopy (FTIR) etc. Stability and physicochemical properties were evaluated via creaming index (CI), emulsion stability index (ESI), and rheological properties etc. Results showed that appropriate ultrasonic treatment improved emulsion dispersion and reduced aggregation, producing small and uniform droplets. Under the optimal ultrasonic treatment conditions, the stability and physicochemical properties of the SPI-FG emulsion are significantly improved. These findings demonstrate that ultrasonic treatment optimizes the performance of SPI-FG emulsions, providing theoretical support for their application in plant-based food processing.
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Journal of Future Foods
·
2025
·
IF 7.2
Mingjing Zheng,Jinhuai Zuo,Huan Ouyang,Tao Hong,Zhipeng Li,Yujia Ou,Yanbing Zhu,Hui Ni,Zedong Jiang
Akkermansia muciniphila plays a key role in maintaining gut barrier integrity, but its interaction with dietary polysaccharides remains unknown. This study investigated the effects of Bangia fusco-purpurea polysaccharide (BFP) on the growth and metabolic activity of A. muciniphila . The results showed that BFP significantly enhanced bacterial growth and short-chain fatty acid production in a dose-dependent manner. Compared with A. muciniphila in a carbon-free medium, integrated proteomic and metabolomic analyses revealed significant changes at the incubation of with 2.00 g/L BFP, including 38 differentially expressed proteins and 157 metabolites. Notably, upregulation of colonization-associated proteins (e.g., MurE, Pyk, GuaB) was observed, along with elevated levels of purine-related metabolites such as guanosine monophosphate and ribose 1-phosphate. Pathway analysis indicated modulation of purine metabolism, cGMP-PKG signaling, and tryptophan metabolism, suggesting that BFP shapes the metabolic adaptation of A. muciniphila in polysaccharide-rich environments. Furthermore, BFP enhanced the expression of MUC-2 and tight junction proteins (ZO-1, Occludin, Claudin), implying the improved intestinal barrier-enhancing effect. These findings demonstrated that BFP can promote A. muciniphila colonization through metabolic reprogramming, supporting its potential application in microbiota-targeted dietary strategies.
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DESALINATION
·
2025
·
IF 9.8
Jiadi Ying,Zhen Cui,Tiancun Liu,Song Lu,Qi Shen,Min Guo,Yeqing Wang,Zhen Yang,Minfeng Zeng,Zhixin Yu,Yuqing Lin
The development of thin, charge-selective surface layers on cation exchange membranes (CEMs) is crucial for advancing electrodialysis technology, particularly for achieving both high ion permeability and precise selectivity. In this study, we developed an innovative approach to fabricate ultrathin polyaniline (PANI) nanolayers on CEM substrates through pre-adsorption of protonated aniline monomers followed by in-situ polymerization. The resulting membranes feature a uniform Turing-type nanostructure through FESEM characterizations, which significantly enhances surface positive charge density. Our optimized membrane demonstrates exceptional performance, achieving a Li + /Mg 2+ selectivity of 6.75 while maintaining a high lithium permeation rate of 0.18 mmol·cm −2 ·h −1 . These results compare favorably with current state-of-the-art permselective membranes and surpass the commercial membrane CSO (5.26 for the Li + /Mg 2+ selectivity and 0.16 mmol·cm −2 ·h −1 for the lithium permeation rate). Mechanistic studies including electrochemical impedance spectroscopy and molecule dynamics simulation reveal that PANI layers with optimal thickness and pore structure minimize resistance to monovalent cations while effectively blocking divalent cations, enabling efficient ion separation during electrodialysis. This work highlights the remarkable potential of nanostructured PANI layers for selective ion transport and provides a practical strategy for designing advanced electrodialysis membranes. The simple fabrication method and outstanding performance characteristics make this approach particularly promising for lithium extraction and other ion separation applications.
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RSC Advances
·
2025
·Vol. 15
·期 48
·40478-40490
·
IF 4.6
Qisong Feng,Junjun Ma,Yankun Shen,Zheng Zhou,Shilian Wu,Juan Wang,Junpeng Li,Yu Yang
Flexible printed electronics represent a swift, efficient, and cost-effective technique for depositing metallic conductive materials onto flexible substrates, particularly with the pivotal advancement of functional conductive inks. Metal–organic decomposition conductive inks have garnered substantial interest owing to their straightforward synthesis, convenient storage, and low processing temperatures. However, during low-temperature heating, these inks frequently encounter issues such as fast pyrolysis and gas escape, leading to numerous defects in the microstructure of silver films. Moreover, low silver content results in a high volumetric shrinkage rate, negatively impacting electrical conductivity. To address these limitations, this study synthesized four distinct silver precursors and conducted an in-depth analysis of their chemical compositions, thermal behaviors, and microscopic morphologies. Conductive inks were developed with a high silver content using silver citrate as the silver source with gradient thermal volatilization and low-temperature reduction properties. The impact of solvents and complexing agents on the performance of ink formulations was then examined. Furthermore, the evolution of the inks' microstructure was investigated during thermal decomposition along with the influence of the microscopic morphology on electrical conductivity. Finally, the thermal decomposition mechanism was elucidated in detail. By introducing organic solvents with varying boiling points, the intensity of thermal decomposition was effectively reduced, thereby minimizing the appearance of surface defects such as bubble holes and sintering marks. This strategy significantly enhanced the density of the silver film, reduced its surface roughness, and improved its electrical conductivity.
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