CARBOHYDRATE POLYMERS
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2025
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IF 12.5
Sa Liu,Yapeng Chen,XinKuan Li,Yijia Yao,Huashan Wang,Meiyi Wang
Food packaging films containing antimicrobial reagents play a crucial role in preventing bacterial-induced fruit decay. This study proposes a bilayer film consisting of an internal amino-modified starch hydrophilic layer and an external amino-modified polyvinyl alcohol/polylactic acid hydrophobic layer, embedding alliin@MIL-101(Fe) as an antibacterial agent, utilizing the pH reduction of fruit decay sites to achieve pH-responsive release, enhancing antibacterial performance. Fourier transform infrared (FTIR) and scanning electron microscopy (SEM) analyses confirm successful crosslinking between amino and aldehyde groups, resulting in the formation of imine bonds and a mesh-like structure conducive to adsorption. Under acidic conditions, the cumulative release rate of alliin reached 74 % within 36 h. Compared to a simple mixture, the tensile strength of the alliin@MIL/NST-NPVA/PLA film reached 34.771 MPa, and transmittance in the wavelength range of 200–370 nm decreased to 0. The scavenging rate of DPPH free radicals in the film can reach 83 %. In addition, the water vapor permeability and oxygen permeability of the film are approximately 7.62 × 10 −16 [g/ (m 2 ‧24 h‧0.1 mm)] and 6.83 (m 2 ‧24 h‧0.1 MPa), respectively; moisture content and water solubility decreased to 10.99 % and 20.77 %. This composite film extended the shelf life of strawberries from 2 to 7 days, significantly enhancing freshness.
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yueqian Yan,Xiaohong Zhou,Wen Jin,Xingyuan Wang,Lei Song,Ziyi Luo,Tuqiao Zhang,Miaomiao Ye
Fenton reaction is a traditional advanced oxidation process that has long been used for wastewater treatment. However, the narrow pH range of 2–4, the inefficient utilization of both H 2 O 2 and Fe 2+ , and the large amount of iron sludge formation limit its application. Here, we prepared sodium alginate composite hydrogel spheres with both Fe 2+ and CoS 2 loading (denoted as CoS 2 /Fe/SA hydrogel spheres) to construct a CoS 2 /Fe/SA + H 2 O 2 reaction system. The degradation efficiency of carbamazepine (CBZ) in the CoS 2 /Fe/SA + H 2 O 2 system was significantly enhanced with a first-order kinetic reaction constant of 0.1958 min −1 , which is 8.9 times higher than that in Fe 2+ +H 2 O 2 system. When the initial solution pH was in the range of 2–8, the removal rate of CBZ at 90 min reaction time ranged from 96.5 % to 99.9 %. The enhanced degradation efficiency even in a slightly alkaline aqueous solution was due to the sustained slow release of Fe 2+ from the CoS 2 /Fe/SA hydrogel spheres that enhances the utilization of Fe 2+ and the promotion of Fe 3+ /Fe 2+ cycling via CoS 2 . Moreover, the release amount of Fe 2+ in CoS 2 /Fe/SA hydrogel spheres could be controlled by tuning the Fe 2+ loading amount during preparation, which in turn determines its number of cycling uses.
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Small
·
2025
·
IF 12.1
Pengwei Tan,Shuyang Shen,Ying Zheng,Yushu Tang,Yuanyuan Luo,Zheng Zhang,Dong Men,Guotao Duan
Electrochemical transistor (ECT) biosensors can achieve ultrahigh sensitivity, while keeping challenges for large biomolecules due to their sizes over the thickness of the electric double layer (EDL) causing a failure of sensing reaction. Here, wafer-level Ni/Fe-metal-organic framework (MOF) films and corresponding ECT biosensors are fabricated for the detection of coronavirus nucleocapsid protein, which realize an ultralow detection limit of 1 fg mL −1 and a wide detection range of 1 fg mL −1 to 100 pg mL −1 . A 3D Debye space, originating from the unique stacking structure of nanosheets and nanoparticles in Ni/Fe-MOF film, is proposed to explain such ultrahigh sensitivity, which ensures the immune-binding and sensing process of the nucleocapsid protein large molecules located in the effective EDL space. Moreover, an appropriate Ni/Fe molar ratio is optimized to enhance the transmission of carriers, thus improving the signal-to-noise ratio and the sensing response. The Ni/Fe-MOF-ECT biosensors will find applications in highly sensitive detection for large biomolecules, and the 3D Debye space may be a design model for constructing other biosensors.
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高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Palanisamy Vasudhevan,Luo Shuhao,Zhang Ruoyu,Velu Manikandan,Dong Yu,Sandhanasamy Devanesan,Prakash Kumar Sarangi,Hui Ma,Saurav Dixit,Shengyan Pu
Chlorinated aromatic compounds are extremely dangerous, transmittable, and bioaccumulative. Ferrous-based persulfate stimulation methods are a potential approach for soil restoration, however they have limitations with ferrous accumulation. Citrate (CA) and ethylenediaminetetraacetic acid (EDTA) were used in the current investigation to enhance the efficiency of Fe(II)-activated persulfate (PS) reactions in the decomposition of 4-chlorophenol (4-CP) and 3-chlorobenzoic acid (3-CB) in soil. The combination of organic ligands with Fe(II) increased the overall iron content in the organic ligands/Fe(II)/PS systems and inhibited Fe(II) accumulation. Organic ligands absorbed Fe oxides in soil and facilitated to stimulate persulfate. The optimal concentration of organic ligands/Fe(II)/PS is 50:50:50, and around 74.11%, 70.05%, and 77.67%, 72.92% of the 4-CP and 3-CB were decomposed within 30 minutes, in contrast to 34.14% and 38.14% in the Fe(II)/PS system. The degradation percentage of 4-CP and 3-CB raised with increasing PS and Fe(II) levels, whereas high PS and Fe(II) concentrations prevented 4-CP and 3-CB degradation, most likely because of sulfate radical absorption. Furthermore, the 4-CP and 3-CB decomposition mediated by the citrate/Fe(II)/PS and EDTA/Fe(II)/PS systems were effective over a wide range of pH values (2.0–10). The organic ligands combined with Fe(II) catalyzed PS degradation showed a strong ability on enduring the effects of HCO3, Cl, and HA anions in soil on 4-CP and 3-CB decontamination. In addition, SO4 •- and OH • produced from citrate/Fe(II)/PS and EDTA/Fe(II)/PS systems were identified as the primary reactive oxygen species for 4-CP and 3-CB degradation. In conclusion, the organic ligands coupled with Fe(II) stimulated PS activation are potentially useful technique for the restoration of 4-CP and 3-CB contaminated soils.
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高影响因子
Journal of Materials Chemistry C
·
2024
·
IF 5.7
Shizhen Song,Tengfei Zheng,Bo Li,Hangcheng Yang,Qin-Xiang Jia,Zhuting Hao,Wen Zhang,Ying Zhang
Solvent vapor-driven soft actuators have been seen as promising devices for human-environment interaction and gained considerable attention in recent years. Considering the limited types of response solvent and the lack of quantification, MOF/polymer intelligent soft actuators may be a potential candidate of the fabrication of the bio solvent-driven actuators. Thus, this paper present a multiple solvent-driven soft actuator based on MIL-88B/PVDF asymmetric film, and also the comparison to the analogs based on other MIL-88(Fe) series flexible MOFs (including MIL-88A, 88C and 88D) was made for the deformation-structure relationship and the solvent-driven mechanism investigation. The deformation behavior to various organic solvent (including methanol, toluene and chloroform) of the MIL-88(Fe)/PVDF composite films have been investigated, and the structure and composition of the MIL88(Fe) fillers and the composite films were also characterized by SEM, FT-IR, and XRD. Based on the above results, the MIL-88B/PVDF composite which shows the diversity of response objects and the fast deformation response to most of the organic solvents through the solvent swelling/adsorption of the MOF skeleton, was used to fabricate a monolayer soft film composed by MIL-88B, carbon black (CB) and PVDF, namely MIL-88B/CB/PVDF. The MIL-88B/CB/PVDF film not only realizes the excellent deformation-discolor dual-responsive to methanol atmosphere with the visible deformation which could being quickly achieved within 1s under 10 vol % methanol atmosphere and the maximum crimp angle being up to 558o within about 50 s, and also a wide color change range including six view angle-dependent high saturation color (red, orange, yellow, green, blue and purple), but also shows an approximate linear relationship to three of the organic solvents (methanol, toluene and chloroform) between the maximum curl angle and the solvent concentration. Furthermore, several smart devices have also been fabricated, including the methanol-driven bionic petals, worm robot, alertor and LIG sensor. Therefore, such soft composites of flexible MOF and polymer have great potential in bio-robot and this work may provide new design strategy for the MOFs/polymer smart materials.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yifan Zhang,Sylvestre Ndayiragije,Ming Chen,Xiaobo Wang,Lihua Zhu,Nan Wang
Fe- and nitrogen-doped carbonaceous (Fe-N-C) sites supported on MnO 2 (Fe-N-C@MnO 2 ) were prepared by a solvent-free mechanochemical method for peroxymonosulfate (PMS) activation to degrade norfloxacin (NFX). After a 50-min ball milling of iron(II) phthalocyanine (Fe( II )Pc) and MnO 2 at a weight ratio of 7.5 %, the obtained Fe-N-C@MnO 2 exhibited exceptional activity in PMS activation, achieving nearly complete degradation of NFX in 5 min with a rate constant of 0.62 min −1 . This rate constant was 11.5 and 28.2 times higher than that for milled MnO 2 (bm-MnO 2 ) and the mixture of Fe( II )Pc and MnO 2 , respectively. Alternative iron sources (FeSO 4 , FeCl 2 , Fe(III)-EDTA) and phthalocyanine showed no enhancement. Characterization revealed Fe-N-C@MnO 2 possessed abundant Mn 3+ , oxygen vacancies and Fe-N-C sites. Combined experimental and computational studies demonstrated Fe-N-C@MnO 2 simultaneously enhanced the 1 O 2 generation and facilitated the formation of SO 4 •− , •OH and O 2 •− , with contributions to NFX degradation following: 1 O 2 > •OH ≈ O 2 •− > SO 4 •− . This work establishes mechanochemical coordination engineering as a facile strategy for constructing high-performance metal-N-C hybrid catalysts.
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ACS Sustainable Chemistry & Engineering
·
2024
·
IF 7.1
Hengyuan Liu,Yingzhe Liu,Xuecheng Zeng,Xude Yu,Jianhong Xu
Electrocatalytic nitrogen reduction reaction (ENRR) is emerging as a promising routine for the sustainable production of ammonia. Hindered by the strong triple bond in N2 and unfavorable hydrogen evolution reaction, it is critical to develop efficient catalysts with excellent activity and selectivity. Herein, we propose a novel microfluidic platform that achieves the continuous synthesis and morphology regulation of a two-dimensional heterocatalyst FeMo/g-C3N4 through a precipitation process in a confined space. Owing to the rapid mixing and microfluidic manipulation, FeMo/g-C3N4 maintains an overwhelmingly favorable structure compared to the batch methods. Benefiting from the ultrasmall active sites (0.86 nm), homogeneous nanodot distribution, and abundant 2D surface, the promoted N2 chemisorption and competitive ENRR performance can be simultaneously ensured, as confirmed by the experimental studies. By varying the applied working potential, the optimal ammonia yield can be determined as 33.25 μg h–1 mgcat.–1 at −1.2 V. This work innovatively opens a pathway for morphological fine structural tuning of two-dimensional heterocatalysts, further promoting the ENRR field’s development.
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高影响因子
JOM
·
2024
·
IF 2.1
Yu Yu,Li Ying,Zhong Yiwei,Wang Mingyong,Guo Zhancheng
Fe-Ni-Co alloy films demonstrate outstanding soft magnetic properties and are widely used as magnetic materials. The ultrasonic-assisted electrodeposition method is highly regarded for its merits in improving alloy film performance. In this study, Fe-Ni-Co alloy film with a uniform composition was fabricated through ultrasonic-assisted electrodeposition. The effects of the electrodeposition parameters on the composition and microstructure of the Fe-Ni-Co alloy films were studied. The results revealed that lower initial electrolyte pH, temperature ( T ), and ultrasonic power ( P ) were conducive to the increase of the iron content of the alloy films. As the ultrasonic power increased, the crystal structure of the Fe-Co-Ni films changed from bcc (FeCo) to fcc (NiFe), and the mean grain size decreased. When the electrodeposited condition was pH = 2, T = 50°C, and P = 45 W, the Fe 58.36 Ni 36.01 Co 5.63 alloy film showed a better corrosion resistance than 304 stainless steels. When the electrodeposited condition was pH = 2, T = 50°C, and P = 90 W, the Fe 53.84 Ni 41.66 Co 4.48 alloy film exhibited good magnetic properties, and the saturation magnetic induction and coercivity were 1.75 T and 85 A/m, respectively, which was much better than Fe-Co-Ni alloy films (Ni: about 40 wt.%) prepared by traditional electrodeposition.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Yirou Bai,Yu Chen,Ping Xue,Lei Wang,Zenghui Diao,Gang Song,Diyun Chen,Lingjun Kong
Nano zero-valent iron (nZVI) has been widely reported to attract uranium (U(VI)) from wastewater through surface adsorption and reduction. However, surface oxidation and agglomeration of nZVI significantly limited the application of nZVI in removing U(VI) from wastewater. In this study, a novel porous nZVI/BC composite (Fe 1 Zn 3 -BC(900)) was synthesized via a one-step process coupling carbothermal reduction and ZnCl 2 activation. In this process, ferric chloride and zinc chloride were employed as the Fe and Zn precursors, while starch was utilized as the biochar precursor. Zn and Fe were formed in the carbothermal reduction process. The Zn was sacrificed through evaporation to increase the porosity, providing sufficient inner space for well-dispersing the nZVI, what could be wrapped and protected by the porous carbon. Besides, the galvanic cell between the nZVI-C interface was formed, accelerating the electron transfer for reduction of U(VI) into U(IV). As expected, the Fe 1 Zn 3 -BC(900) performed a high efficiency of 94.3% for separating the U(VI) in an initial concentration of 10 mg/L within 30 min, confirming the positive effect of ZnCl 2 sacrifice on enhancing separation of U(VI) onto the Fe 1 Zn 3 -BC(900). The high uranium removal efficiency can be attributed to the fact that the enhanced porosity resulting from Zn evaporation facilitates U(VI) adsorption. The reduction of U(VI) is further facilitated by the high dispersion of nZVI and the formation of Fe/C galvanic cell. Therefore, this work has developed a promising method to address the agglomeration of nZVI in the separation of U(VI) from wastewater, which provides a new idea for the subsequent efficient uranium removal.
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高影响因子
Molecular Catalysis
·
2024
·
IF 3.9
Zheng Zhou,Meng Miao,Wenzhi Li,Jingting Jin,Liqun Wang,Lulu Zhang,Liang Yuan
The selective conversion of methane is a significant but difficult challenge. We reported a CuFe bimetallic catalyst supported by g-C 3 N 4 for the catalytic oxidation of methane to oxygenated C1 products. Using H 2 O 2 as the oxidant, Cu 0.4 Fe 0.3 -C 3 N 4 catalyst had a C1 yield of 8231 μmol·g cat −1 · h −1 at 70 °C, and 1 H NMR results showed that almost all of the liquid phase products were target C1 products. The methanol selectivity on CuFe-C 3 N 4 was 44.5 %, comparing with 20.2 % methanol selectivity on Cu-C 3 N 4 . The formation of a Cu-O-Fe site on the CuFe-C 3 N 4 was confirmed by in situ DRIFTS and 57 Fe Mössbauer spectroscopy. This Cu-O-Fe site was responsible for the improved catalyst performance. DFT calculations illustrated that at the Cu-O-Fe site, H 2 O 2 dissociated into two ·OH radicals instead of ·H and ·OOH radicals as it did at the Cu-O-Cu site. The ·OH radicals combined with the ·CH 3 radicals from the CH 4 molecules to form methanol. These findings provided valuable insights into the rational design of active sites on carbon nitride materials.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Guoyu Wei,Jiaxin Chen,Qunfeng Yue,Changhong Guo,Fengyu Qu,Huiming Lin
The pervasive presence of pathogenic bacteria in water environment poses a serious threat to public health. Here, a photocatalytic cascade was developed to reveal great water disinfection. Firstly, N -doped carbon nanosheets ( N -CNSs) about 30–50 nm in size were synthesized by a hydrothermal strategy. It revealed wide-spectrum photocatalysis for H 2 O 2 generation via a typical two-step single-electron process. A Fenton agent (Fe ion) was loaded, N -CNSs-Fe can in-situ convert photocatalytic H 2 O 2 into ·OH with high oxidation potential. Moreover, its Fenton active is three times greater than pure Fe 2+ owing to electron enrichment from N -CNSs to Fe for Fe 3+ /Fe 2+ cycle. Further investigation displayed that Fe loading also could decrease bad gap and promote charge separation to boost photocatalysis. In addition, N -CNSs-Fe possesses positive surface potential to exhibit strong interaction with negative bacteria, facilitating the capture. Therefore, the nanocomposite can effectively inactivate E. coli with a lethality rate of 99.7 % under stimulated sunlight irradiation. In addition, it also was employed to treat a complex lake water sample, revealing great antibacterial (95.1 %) and dye-decolored (92.3 %) efficiency at the same time. With novel biocompatibility and antibacterial ability, N -CNSs-Fe possessed great potential for water disinfection.
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高影响因子
Water
·
2024
·Vol. 16
·期 13
·1822
·
IF 3
Dongyuan Zhang,Lin Shi,Edwin Hena Dawolo,Bingfa Chen,Ning Ding,Hong Liu
In this study, magnetic (Fe)-loaded biochar was successfully prepared by a simple impregnation pyrolysis method. Meanwhile, its degradation capability and mechanism for typical antibiotic metronidazole (MNZ) were systematically investigated under different conditions. The characterization of the synthesized material showed that the specific surface area, pore diameter, and pore volume changed significantly. Also, functional groups and metal element Fe were introduced on the surface of the biochar, leading to its better capability to activate peroxymonosulfate (PMS). The degradation experiments showed that the removal of MNZ in the Fe-BC/PMS system can reach up to 95.3% in 60 min under optimal conditions. Free-radical capture experiments showed that there were several active species of •OH, SO4•−, •O2−, and1O2present in the catalyst to synergistically degrade MNZ, among which SO4•−played a major role; it was also found that the material can be easily recycled and was still effective after several uses. Further, the main degradation pathways of MNZ include nitrohydroxylation, hydroxyethyl functional group deletion, carboxylation of the amino functional group of •OH, demethylation, oxidation, and carboxylation. It is obvious that the synthesized magnetic-loaded biochar, Fe-BC, generated from waste rape straw crops, shows high catalytic performance in pollutant degradation, providing an insight into the recycling potential of waste biomass in the catalytic field for pollutant removal.
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高影响因子
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