CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Mingjin Xue,Tingzhe Wang,Zewen Wu,Hao Liu,Shunbao Hu,Bingtao Bao,Aihua Tang,Yiting Xu,Weiang Luo,Guorong Chen,Birong Zeng,Conghui Yuan,Lizong Dai
Preparing multifunctional epoxy resin composites with excellent flame retardancy and long-lasting anti-corrosion properties has always been a huge challenge. In this study, we used o -vanillin-based ZIFs to coat multilayered MXene nanosheets in situ to obtain MXene@ZIF nanohybrid materials and subsequently prepared epoxy composites with excellent flame-retardant properties, long-lasting corrosion-resistant properties, and excellent mechanical properties. It was shown that in situ capping with o -vanillin-based ZIFs significantly enhanced the defects of MXene lamellae and improved their dispersion in the matrix. When the MXene@ZIF content was only 3 wt%, the limiting oxygen index (LOI) of EP/MXene@ZIF increased to 28.6 %, and compared with pure EP, its total heat release and total smoke release were reduced by 32.2 % and 16.2 %, respectively. Electrochemical impedance spectroscopy (EIS) and salt spray testing showed that the epoxy composite coating incorporating MXene@ZIF nanosheets had excellent long-term anti-corrosion properties. Even after soaking in 3.5 % NaCl solution for 2400 h, the epoxy composite coating still maintained an impedance value of 1.47 × 10 8 Ω cm 2 . In addition, the mechanical properties of EP/MXene@ZIF were also significantly enhanced. All in all, this study provides a multifunctional modification strategy for epoxy resin via a single filler, expanding the application prospects of epoxy resin composites in different fields.
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CATALYSIS LETTERS
·
2025
·Vol. 156
·期 1
·21
·
IF 2.4
Yang Jihui,Shi Minghao,Zheng Jiahao,Zhang Shule,Zhong Qin
Ammonia Selective Catalytic Reduction (NH₃-SCR) is highly effective for nitrogen oxide (NO x ) removal, yet its low-temperature activity remains a key limitation for broader applications. We developed an innovative series of microporous N, O-codoped carbon catalysts (NOAC-x) that facilitate the fast SCR reaction. Results demonstrate that the synergy between catalyst micropore structure and surface functional groups governs denitrification performance: Low-temperature calcination induces pore blockage by nitrogen-containing groups (pyridinic N), reducing specific surface area and weakening NH₃/NO adsorption capacity.Moderate calcinatio promotes partial decomposition of nitrogen groups, optimizing the micropore structure while preserving active sites such as carboxyl groups and pyridinic N, thereby significantly enhancing catalytic activity.High-temperature calcinatio triggers pore collapse and decomposition of active groups, degrading performance.NOAC-600 achieved 95% NO x conversion at 120 °C and exhibited merely a 2% activity decline during a 108-hour stability test. This work provides theoretical guidance for designing microporous N, O-dual-doped carbon-based catalysts and underscores the critical importance of micropore structure and surface chemistry optimization in low-temperature SCR technology. Graphical
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SENSORS AND ACTUATORS B-CHEMICAL
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2020
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IF 7.1
Dezhi Yang,Qiulan Li,Sai Kumar Tammina,Zhe Gao,Yaling Yang
The construction of highly efficient nanozyme activities in a simple means is vital for the wide biological and chemical applications. Present work describes a Cu-based carbon dots (Cu-CDs) with oxidase- and peroxidase-like activity for the catalytic oxidation of o -phenylenediamine (OPD) at neutral pH. The peroxidase-like activity of Cu-CDs was finely tuned and enhanced by changing the ascorbic acid (AA) content and reduction temperature to increase the Cu + content. The oxidation of OPD was significantly accelerated by the addition of Fe 2+ ions (i.e., Cu-CDs + Fe 2+ /H 2 O 2 system) and presented a smaller K m (Michaelis constant) and a higher V max (maximum rate) than horseradish peroxidase (HRP) at the same mass concentration. The Cu-CDs with oxidase- and peroxidase-like activities could catalyze to produce the superoxide radical ( · O 2 - ) and hydroxyl radical (·OH) in the system. Interestingly, the catalytic oxidation of OPD to 2,3-diaminophenazine (DAP) could be inhibited by Cr(III) ions in Cu-CDs + Fe 2+ /H 2 O 2 system. Therefore, a new fluorescent detection strategy was developed for the detection of Cr(III) with the linear range of 0.2−100 μM, and the detection limit of 36 nM (S/N = 3). This work provides new insight into the mechanism and kinetics of low-valence copper–carbon dots peroxidase-like and Fenton co-catalyst system.
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TETRAHEDRON
·
2014
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IF 2.817
Dazhuang Miao,Xuesong Shi,Guozhen He,Yao Tong,Zengqiang Jiang,Shiqing Han
N -(2-Chloro-phenyl)-2-halo-benzamides (halo=I/Br/Cl) as substrates were used for the one-pot synthesis of 2-arylbenzoxazole derivatives via copper-catalyzed intermolecular C–N/intramolecular C–O couplings with primary amines . This aryl amination offers clean reaction conditions and easy work-up in good yields by using CuI as catalyst, readily available 8-hydroxyquinoline as ligand, K 3 PO 4 as base, DMF as solvent.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2024
·
IF 8.1
Xiang Li,Ting Wu,Yawei Zhu,Qingwen Tian,Qiang Yang,Guigan Fang
Photocracking of lignin β–O–4 bonds is a green approach for the high-value modification of lignin. Graphitic carbon nitride (g-C 3 N 4 ) that can photocleave the β–O–4 bond is presently the only stable, metal-free photocatalyst owing to the residual metal ions generated due to photocorrosion of metal sulfides. Herein, g-C 3 N 4 with a N–C 3 vacancy structure is prepared by etching site–engineering strategy based on the protection of C–N=C structure by chlorine atom. The N–C 3 vacancy structure can reduce the transport path of the photogenerated electrons by tuning the conduction band (CB) region to the edge of the photocatalyst, which impedes the critical complexation of the photogenerated electron–hole pairs and enhances the photoelectric conversion efficiency five-fold. Combined with the unique chemisorption capacity (137.82 kJ/mol) of N–C 3 vacancies for oxygen, the g-C 3 N 4 photocatalysts with N–C 3 vacancy structure can generate 9.6-fold higher superoxide radicals and 13-fold higher lignin β–O–4 bond photocleavage efficiency lignin compared with untreated g-C 3 N 4 . Based on the reaction enthalpy changes and free energies investigated through simulations, a route of lignin C α –C β bonds being oxidized and dehydrogenated twice by photogenerated cavities is proposed for the first time. This work reveals the relation between the properties of g-C 3 N 4 and the photocleavage efficiency of lignin β–O–4 bonds.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
·
IF 8.5
Zheng Zhang,Pengju Miao,Daning Lang,Jiyang Li,Ronglan Wu,Wei Wang,Chao Yang,Lu Wang,Jihong Fu
With the acceleration of global industrialization, a large amount of polluted wastewater is discharged indiscriminately, which both pollutes the environment and threatens human health. In this study, by constructing a binary system of unsaturated polyester resin/carboxychitosan, and improving the inherent defects of carboxychitosan aerogel, we successfully prepared aerogels with high porosity, low density, and laminar porous structure for water remediation by using a combination of the sol-gel method and directional freezing technology. Thanks to the synergistic effect of surface wettability and special pore structure, the aerogel not only adsorbs and separates MB and Pb(II) efficiently with a separation efficiency of more than 99 %, but also has a separation efficiency of 99.7 % for the o/w emulsions, which can be reused. The adsorption process is consistent with Pseudo-second-order kinetics and Langmuir isotherm, and is mainly influenced by electrostatic interactions and hydrogen bonding. Compared with other water body remediation materials, the chemical durability and structural stability of this aerogel are more excellent, and it maintains the efficient purification ability for multiple pollutants under special treatments such as prolonged UV aging and mechanical agitation, and is expected to be an ideal material for the synergistic treatment of multiple pollutants in complex environments.
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Food Packaging and Shelf Life
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2024
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IF 8.5
Jiahao Xu,Zhengang Zhao
Active food packaging films with biological activities are a promising food technology, and antioxidant ability is one of the most important biological activities. In this study, an antioxidant active packaging film was prepared by directly blending gelatin, chitosan and a novel O/W Pickering emulsion and then drying. The emulsion was prepared from two antioxidant compounds, Mesona Chinensis essential oils (MCB-EO) and betanin-loaded quaternary ammonium-functionalized mesoporous silica nanoparticles (betanin-QAMSNPs), which provide this emulsion with high antioxidant activity. After adding the emulsion, the water content (26.63 %), water solubility (28.3 %), and water contact angle (86.2°) of the film are lower than those of the gelatin-chitosan film. The thickness and water vapour permeabilities of the betanin-Pickering emulsion film are 275.25 µm and 4.802 × 10 −10 g·s −1 ·m −1 ·Pa −1 , respectively, which are higher than those of gelatin-chitosan films. Adding betanin-Pickering emulsions can decrease the roughness of the surface, which is observed by atomic force microscopy (AFM) and scanning electron microscopy (SEM). The DPPH and ABTs + free radical scavenging capacities of the betanin-Pickering emulsion films are 21.77 % and 91.87 %, respectively, which are higher than those of the gelatin-chitosan films (4.64 % and 61.15 %), indicating that adding the betanin-Pickering emulsion can enhance the antioxidant ability of the gelatin-chitosan films. The betanin-Pickering emulsion films can inhibit the oxidation of soybean oil. In conclusion, in this study, a novel food packaging film was successfully prepared and has potential application as an antioxidant food packaging material.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Wanxing Li,Zelin Bai,Yongguang Yang,Hang Li,Ling Li,Youwei Zhao,Zhanqi Wang,Libin Xu,Wenming Zhang
NiCo₂O₄@ZnWO₄ core-shell nanowire heterostructure with enhanced interfacial synergy. • Ultrahigh sensitivity and robust mechanical durability for pressure sensing. • Versatile human motion and physiological signal monitoring. • Dual-mode sunlight intensity detection and acoustic signal recognition. • High-performance non-enzymatic glucose sensing and wireless sweat analysis. With the growing demand among people with diabetes for multidimensional health management, sensors with multimodal sensing capabilities have become a hot topic of research. Inspired by wheat ears found in nature, this study employed a two-step hydrothermal method to synthesise NiCo₂O₄@ZnWO₄ core-shell heterojunction nanocomposites with a biomimetic wheat-ear-like microstructure, which were then utilised in multifunctional sensors. Owing to the synergistic effects of the hierarchical structure and the core-shell heterojunction, the sensor exhibits high sensitivity (1.48 × 10 8 kPa −1 ) and rapid response and recovery times (66/67 ms) within a pressure range of 18–100 kPa. It remains stable even after 10,000 cycles, enabling the real-time capture of movement signals from diabetic patients. Meanwhile, the strong charge transfer effect and abundant active sites at the NiCo₂O₄@ZnWO₄ interface enable the sensor to demonstrate high sensitivity (55.72 mA mM −1 cm −2 ), a wide linear range (1–1200 μM), and a low detection limit (0.22 μM, S/N = 3) in sweat glucose detection. Furthermore, the incorporation of ZnWO₄ endows the device with excellent responsiveness to UV irradiance within the range of 20–100 mW cm −2 . By deeply integrating biomimetic structural design with multimodal sensing capabilities, this study provides an effective strategy for diabetes health management. Download: Download high-res image (201KB) Download: Download full-size image
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JOURNAL OF POWER SOURCES
·
2026
·
IF 8.4
Guanghui Zhou,Yumeng Jia,Kai Chen,Haiguang Gao,Jian Zang,Yucheng Huang,Juan Xu,Jianyu Cao
Organic cathode materials present a highly viable alternative, offering abundant resources, environmental compatibility, and highly designable molecular structures. However, conventional organic materials suffer from high solubility and low electronic conductivity. To overcome these inherent drawbacks, we propose a structural design strategy based on constructing extended π-conjugated molecular frameworks with high-density electrochemically reversible groups. Inspired by this strategy, we synthesized a novel sulfur-linked C3-symmetric conjugated organic compound, tris-benzothioxanthenedione 2,3-b (denoted as 6S6O), via a facile condensation reaction. The unique structure of 6S6O provides multiple high-density C=O/C=N moieties for reversible lithium storage, excellent solvent tolerance, and high intrinsic conductivity due to electron delocalization. Electrochemical testing demonstrates outstanding performance in a Li//6S6O half-cell, delivering a high reversible capacity of 352 mAh g −1 at 0.1 A g −1 , corresponding to a high energy density of ∼748.6 Wh kg −1 . Importantly, the electrode demonstrates excellent rate capability (retaining 65.3% capacity with a 20-fold current increase) and superior long-term cycling stability, maintaining 77.5% capacity retention over 2409 cycles at 2 A g −1 . Ex situ characterization and DFT calculations confirm a highly reversible, capacitive-controlled Li + storage mechanism involving the C=O and C=N bonds of the quinone/pyrazine units. The results validate the effectiveness of the extended π-conjugated design for developing high-performance organic cathode materials.
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FOOD RESEARCH INTERNATIONAL
·
2026
·
IF 8.8
Na Wang,Xiangyang Zhang,Li Xue,Zhen Zhang,Li Fu,Xuejiao Ren,Hui Zhang,Bo Zhang,Xiaoyu Jiang,Lili Zhang,Mei Wang
Daoguang nianwu (DGNW), a representative Chinese Chenxiang-type baijiu stored in wooden Jiuhai, features the distinctive “three aroma-types in one sip” profile. Six vintages (0, 1, 3, 5, 10 and 20 years) were analyzed via GC-E-Nose, GC-IMS, GC-MS-O, ROAV and chemometrics to characterize its aging aroma. A total of 130 aroma compounds were identified, with esters dominant at 43.08%. Young DGNW (0Y) exhibited more numerous key aroma-active components including ethyl 2-methylbutyrate, furfural, 4-ethylguaiacol and dimethyl trisulfide (DMTS), presenting “fruity”, “floral”, and “caramel” notes alongside “herbal, smoky” and “pickle” off-odors. In contrast, aged DGNW (5Y) displayed richer diversity with enhanced “sour”, “woody, fresh” notes attributed to hexanoic acid, ethyl octanoate, phenylethyl alcohol and heptanol, with complete elimination of off-odors. OPLS-DA revealed three aging stages: young (0Y), low-aged (1Y–3Y) and high-aged (5Y–20Y), identifying 5 years as the critical turning point with stabilization after 10 years. Cluster analysis (CA) validated 12 dual-functional key aging markers. Notably, most of 51 screened markers decreased during storage, including furfural—a pattern contrary to pottery-jar-aged baijiu. Based on these findings, we propose an “initial alkalinity to late acidity” hypothesis for the wooden Jiuhai aging environment, providing theoretical insights for optimizing wooden Jiuhai storage technology in Chinese baijiu production.
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APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Zhiheng Pang,Fang Cui,Qinghai Ma,Tieyu Cui
As an alternative to noble metal oxygen evolution reaction (OER) catalysts, iron-based materials face limitations in their practical applications due to their relatively low activity and conductivity, despite their cost-effectiveness. In this study, we developed a Ce-doped amorphous FeOOH catalyst (Ce-FeOOH) using an electron modulation strategy, leveraging the strong electron-absorbing capability of Ce 4+ ions to regulate the electronic structure of the FeOOH active site. Experimental results and characterizations demonstrated that Ce 4+ extract electrons from the iron sites via the Ce(IV)-O-Fe electronic bridges, generating highly active iron species with elevated oxidation states, thereby effectively enhancing the OER catalytic performance. The optimized Ce-FeOOH-3:2 exhibited outstanding OER performance in 1.0 M KOH, achieving a low overpotential of 248 mV at a current density of 10 mA cm −2 , a Tafel slope of 44 mV dec −1 . Moreover, the material exhibits stable continuous electrolysis performance for 100 h at overpotentials of 250 mV and 384 mV, respectively. This work provides a novel approach to synergistically modulating the electronic state of iron-based catalysts through high-valent metal doping and structural amorphization, offering valuable insights of the design and development of highly efficient and stable non-precious metal OER catalysts.
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JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE
·
2026
·
IF 4
Qingchen Luo,Xinyan Xu,Qian Fan,Fei Pan,Lei Zhao,Liang Zhao
BACKGROUND 2-Amino-3-methylimidazo[4,5- f ]quinoline (IQ), a typical heterocyclic amine, is a common dietary carcinogen raising gastric and colorectal cancer risks. As an abundant anthocyanin monomer with established antioxidant and anti-inflammatory activities, cyanidin-3- O -glucoside (C3G) might attenuate IQ toxicity. Nevertheless, whether and how C3G alleviates IQ-triggered gastrointestinal damage remains unclarified. This study investigated the protective mechanisms of C3G against IQ-induced gastrointestinal injury in mice using biochemical assays, histopathology, western blotting, 16S rRNA sequencing, and molecular simulation. RESULTS The results demonstrated that C3G significantly ameliorated IQ-induced gastric and colonic tissue damage. It effectively reduced key inflammatory markers (nitric oxide, interleukin-6, and tumor necrosis factor-α) and the oxidative stress marker MDA in repaired mouse tissues and serum, while elevating antioxidant enzyme levels. Western blot analysis revealed tissue-specific protective mechanisms. In gastric tissue, C3G activated the Keap1-Nrf2 pathway to enhance antioxidant capacity and suppressed the NF-κB pathway to attenuate inflammation. In the colon, C3G inhibited inflammation via MyD88/TLR4/NF-κB signaling and upregulated the expression of tight junction proteins to restore intestinal barrier function. Gut microbiota analysis revealed that C3G reversed IQ-induced dysbiosis and increased the relative abundance of beneficial bacteria such as Roseburia and Enterorhabdus . Molecular dynamics simulations demonstrated that C3G could enhance IKKβ stability and interfere with its phosphorylation by forming hydrogen bonds with residues ASP151 and ASP109. CONCLUSION This study elucidates that C3G alleviates IQ-induced gastrointestinal injury through a multidimensional mechanism involving microbiota modulation, antioxidation, anti-inflammation, and intestinal barrier repair, providing a theoretical basis for anthocyanin-based dietary interventions against heterocyclic amine toxicity. © 2026 Society of Chemical Industry.
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