Journal of Advanced Research
·
2026
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IF 17.1
Zi-An Deng,Yibo Liu,Wenjing Shi,Jiayue Jin,Fengjun Guo,Di Wu,Qingjun Liu,Saowapa Chaiwong,Kunsong Chen
Introduction Developing advanced functional composites by integrating metal–organic frameworks (MOFs) with polymeric nanofibers are important research in materials science. This strategy of incorporating MOFs into polymeric nanofibers offers a promising route to fabricate multifunctional materials with controlled release and antimicrobial capabilities. However, most existing MOFs are metal-based, which poses potential metal ion leaching risks in food-contact scenarios; besides, achieving uniform MOF dispersion in polymeric matrices and enabling scalable fabrication of such composite nanofibers remain challenges. Objectives The present study aimed to develop a novel and scalable fabrication platform for food-grade MOF-nanofiber composites by integrating γ-cyclodextrin metal–organic frameworks (γ-CD-MOFs) with rapid microfluidic-blow-spinning (MBS). Methods γ-CD-MOF was synthesized using γ-cyclodextrin as a biomolecular ligand, followed by adsorption of thymol (THY) through electrostatic interactions. Molecular docking was conducted to elucidate the encapsulation and stabilization mechanisms. The THY-loaded γ-CD-MOF was incorporated into polycaprolactone (PCL) nanofibers via MBS to produce THY@γ-CD-MOF/PCL nanofiber films. Their physicochemical properties, mechanical performance, sustain release behavior, antimicrobial activity, biocompatibility, and preservation efficacy in fresh-cut fruits were evaluated. Results γ-CD-MOF achieved 78.3 % THY encapsulation. Docking revealed hydrogen bonding between the phenolic hydroxyl group of THY and hydroxyl groups of dual γ-CD units (1.781 Å), shorter than typical hydrogen bonds (∼3.5 Å), contributing to complex stability. MOFs were well-dispersed, and their incorporation enhanced the thermal stability, mechanical strength, and hydrophilicity of the nanofibers. The nanofiber films exhibited broad-spectrum antimicrobial activity, sustained THY release at 4 °C and 25°C, and good biocompatibility, effectively suppressing browning and firmness loss in fresh-cut apples. Conclusion The MBS-based platform enabled efficient fabrication of active food-grade γ-CD-MOF-loaded nanofiber preservation materials. THY encapsulation via hydrogen bonding and hydrophobic interactions provided sustained release and antimicrobial functionality, significantly extending the freshness of fresh-cut apples.
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高影响因子
DALTON TRANSACTIONS
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2018
·Vol. 47
·期 47
·16862-16875
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IF 4.099
Shijian Zhou,Weiming Jin,Yun Ding,Bo Shao,Bangbang Wang,Xu Hu,Yan Kong
Nowadays, agglomeration and leaching of metal active sites during reaction and recycle processes are considered to be a thorny problem for noble metal-based catalysts. Therefore, to make improvements, nano-gold was selected as a representative research object for many noble metals. In this study, Au nanoparticles (NPs) and magnetic γ-Fe2O3 were intercalated in situ in the walls of MCM-41 via a one-pot hydrothermal method, in which the intercalation process was preceded by co-condensation of tetraethyl orthosilicate (TEOS) with MPTS-Au complexes ((3-mercaptopropyl)-trimethoxysilane (MPTS), HAuCl4·3H2O), and a Fe3O4 sol. By the confinement of silica, Au NPs and γ-Fe2O3 were well dispersed in the walls of MCM-41, the sintering and loss of Au NPs was highly restricted, and the magnetic property of γ-Fe2O3 facilitated the recycling of Au-based catalysts. Additionally, abundant void defects appeared in MCM-41 by assembly of micelles in different sizes and shapes, greatly improving the surface area of target catalysts (>1800 m2 g−1), which provided more opportunities for contact and collision between reactors and gold active sites, effectively solving the problem of mass transportation. As expected, a series FeAu@MCM-41 catalysts showed superior catalytic activity in the reduction of 4-nitrophenol (4-NP) and organic dyes (MB, RhB, and MO), and these catalysts were recycled five times without significant loss of metal species or catalytic activity. This is attributed to the confinement effect of the silica walls and the excellent magnetic properties of γ-Fe2O3. This special structure of FeAu@MCM-41 catalysts provides more insights for designing and fabricating noble metal-based catalysts with desirable performances.
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高影响因子
POLYMER
·
2025
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IF 4.5
Chunxia Gao,Jiadong Zhu,Hailin Wu,Jing Chen,Peizhi Zhu,Qiang Gao
Hydrogels have aroused increasing attention as flexible and wearable electronic devices due to their unique properties and multifunctionalities. Herein, a novel dual network ionic conductive poly (vinyl alcohol)/poly (γ-glutamic acid)/lithium chloride (LiCl) hydrogel with 25 wt% LiCl (PVA/γ-PGA/LiCl 0.25 ) exhibited high transparency (91.12 %), excellent anti-freezing (−80 °C), good water retention (maintain 88 % of the initial water content after 7 days at 25 °C, 44 % RH), high conductivity (11.29 ± 0.13 S/m), good flexibility (491.71 ± 17.47 %), self-healing (∼100 %, 4 h) and self-regeneration abilities were successfully developed. Meanwhile, the conformal adhesion between the PVA/γ-PGA/LiCl 0.25 hydrogel-based strain sensor and skin due to the formed hydrogen bonds, which was conductive to the generate accurate, stable, and recyclable electrical signals with excellent sensitivity (GF = 5.61). In view of these merits, the PVA/γ-PGA/LiCl 0.25 hydrogel-based sensors not only precisely captured human motions with high strain, but also succeeded in sensitively detecting slight movements of face and throat. Notably, the assembled triboelectric nanogenerators (TENGs) tactile sensors and capacitive pen by using PVA/γ-PGA/LiCl 0.25 hydrogels has provided the possibility for human-computer interaction. These applications indicated that the developed PVA/PGA/LiCl 0.25 hydrogel have great potential in the fields of wearable electronics for human motion detection, self-powered devices and human-computer interaction.
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INORGANIC CHEMISTRY
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2023
·
IF 4.6
Enming Ping,Xiaoxiao Chen,Yunshan Zhou,Lijuan Zhang,Lingyun Kong,Nan Chen
In this work, CAU-10-H@γ-AlOOH is prepared, and then UTSA-16 is loaded on CAU-10-H@γ-AlOOH to obtain UTSA-16@CAU-10-H@γ-AlOOH. Using the as-prepared composites as stationary materials by cryogenic gas chromatography at 77 K, while CAU-10-H@γ-AlOOH achieves the complete separation of ortho-H2 (o-H2) and D2 with a resolution R of 1.66 and a separation time t of 9.52 min, UTSA-16@CAU-10-H@γ-AlOOH achieves higher efficiency separation of hydrogen isotopes in a shorter separation time (4.56 min) with R = 1.7. Molecular simulation results show that CAU-10-H has both chemical affinity quantum sieving and kinetic sieving effects for H2/D2 at 77 K, and UTSA-16 can only exert the kinetic sieving effect. UTSA-16’s load on CAU-10-H@γ-AlOOH weakens the adsorption of hydrogen isotopes, and the presence of Co2+ in UTSA-16 promotes the conversion of para-H2 to ortho-H2. In gas chromatography, H2 was preferentially desorbed from the system due to strong D2 adsorption caused by the chemical affinity quantum sieving effect and faster H2 diffusion caused by the kinetic sieving effect. These additive effects achieved efficient hydrogen isotope separation at 77 K.
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TALANTA
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2012
·
IF 3.794
Wan-Jun Li,Xiao Zhou,Shan-Shan Tong,Qiong Jia
The present work proposes a study of the synthesis of poly( N -isopropylacrylamide- co - N , N ′-methylene bisacrylamide) monolithic column embedded with γ-alumina nanoparticles and its applications to the extraction of synthetic food dyes in soft drink samples. The monolithic column was synthesized inside fused silica capillaries using thermally initiated free-radical polymerization with N -isopropylacrylamide (NIPAAm) as the monomer , N , N ′-methylene bisacrylamide (MBAAm) as the cross-linker, dimethylsulfoxide (DMSO) and dodecanol as the porogen . γ-Alumina nanoparticles were introduced to prevent the swelling of the organic polymer and enhance the loading capacity. In order to obtain optimum experimental conditions, sample pH, sample flow rate , sample volume, eluent flow rate were investigated. Under the optimum conditions, we obtained acceptable linearities, low limits of detection, and good intra-day/inter-day relative standard deviations. When applied to the determination of four synthetic food dyes (Tartrazine, Sunset Yellow, Allura Red, and Azorubine) in soft drink samples, satisfactory recoveries were obtained in the range of 90.4–109.2%.
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2019
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IF 14.229
Zhiqun Xie,Jiali Zhou,Jinnan Wang,Corvini Philippe François-Xavier,Thomas Wintgens
Novel Fenton-like catalyst γ-Cu-Al 2 O 3 -Bi 12 O 15 Cl 6 with electron-poor Cu centre and electron-rich Bi centre was synthesized for selective degradation of phenolic compounds. Different from electron-rich Cu centre catalysts, the electron-poor Cu centre, which was induced by high electronegativity of Bi, could facilitate the formation of σ-Cu-ligand with phenolic compounds. On one hand, H 2 O 2 could directly oxidize σ-Cu-ligand to HO-adduct radicals with the generation of OH. Meanwhile, Cu(II) in the σ-Cu(II) complexes could be reduced to Cu(I) by oxidization of the HO-adduct radicals to hydroxylation products. Such reaction not only prevented Cu(II) from oxidizing H 2 O 2 to HO 2 /O 2 − but also enhanced the redox cycle of Cu(II)/Cu(I), which improved the catalytic activity and H 2 O 2 utilization. On the other hand, although the σ-Cu-ligand was gradually decreased with the decrease of phenolic compounds, dual-reaction centre played the dominant role in catalytic reaction . In addition, large amounts of oxygen vacancies (OVs) are formed in Bi 12 O 15 Cl 6 during the calcining process (BiOCl→Bi 12 O 15 Cl 6 ) , which can also increase the generation of OH. Thus, both electron-rich Bi center and OVs could still reduce H 2 O 2 to · OH for organics degradation even without the formation of σ-Cu-ligand. Being attributed to the synergistic effect of σ-Cu-ligand, dual-reaction centre and OVs mentioned above, γ-Cu-Al 2 O 3 -Bi 12 O 15 Cl 6 achieved high catalytic activity for phenolic compounds degradation and utilization efficiency of H 2 O 2 (η). In addition, various analytic methods (XPS, TPR, FT-IR, Raman, EPR and solid-state EPR) were used to prove the synergistic effect of the electron-poor/rich centre, σ-Cu-ligand and OVs of catalyst.
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