Symmetry-Basel
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2023
·Vol. 15
·期 7
·1334
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IF 2.7
Guolin Song,Chengzhu Shen,David Bassir,Qiulin Li
In this study, a facile strategy of regulated self-assembly synthesis of Mn-MIL-100, using sodium acetate (CH3COONa) as a mono-dentate ligand capping agent (CA), was proposed. The as-prepared product is denoted Mn-MIL-100-CA. The coordination modulation of CH3COONa, led by its interference in the connectivity and symmetry of the metal centers and organic nodes, plays a vital role in the synthesis process. The crystallinity, morphology, topology, and properties of such MOF products were improved, since the self-assembly process of Mn-MIL-100-CA was promoted and regulated effectively. The materials were systematically characterized via XRD, SEM, N2isotherms, XPS, and TGA in terms of crystallization behavior, morphology, topology, chemical composition, and thermal and water stability. The ability of Mn-MIL-100 and Mn-MIL-100-CA to remove methylene blue (MB) from an aqueous solution was investigated using a UV–vis spectrophotometer. The results indicate that with the addition of a molar ratio of 50% CH3COONa, Mn-MIL-100-CA particles developed a regularly symmetrical morphology, i.e., ‘spherical pyramid-like structure’ crystals with a dimension of 2~5 μm. Their specific surface area and pore volume increased by 59.2% and 56.7%, respectively. The increased proportion of Mn3+implies reduced crystal defects and improved crystal structural order and integrity, and therefore an enhanced water stability. Mn-MIL-100-CA exhibited excellent adsorption performance towards MB from aqueous solution. The equilibrium adsorption value was as high as 1079.9 mg/g, which is 44.7% higher than that of Mn-MIL-100 without the addition of CA. The good adsorption capacity and excellent water stability mean that Mn-MIL-100-CA has great potential for the practical removal of MB dye pollutants from water.Keywords:metal organic frameworks;Mn-MIL-100;capping agent;symmetry;self-assembly;methylene blue adsorption
研究领域:
材料科学
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环境科学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
·
IF 13.3
Yong Fu,Pengyi Zhang,Xianjie Wang
We developed a feasible strategy to obtain the defective MIL-100(Cr) (De-M) via doping 3,5-pyridinedicarboxylate and subsequently loaded polydivinylbenzene (PDVB) by thermal deposition to obtain a hydrophobic MOFs composite (De-M@PDVB). De-M 10 (10 % defective ligand/total ligands) exhibited excellent performance for the capture of toluene due to uniform particle size, high specific surface area and pore volume. Subsequent thermal deposition with PDVB further increased the hydrophobicity, as-obtained De-M 10 @PDVB in the dynamic adsorption experiment showed about 2 and 1.5 time adsorption capacity as that of primary MIL-100(Cr) and De-M 10 under 50 % RH at 298 K. In addition, the toluene uptake of De-M 10 @PDVB (0.95, 298 K) in static adsorption experiments was 1320 mg/g, much higher than many reported MOFs. Furthermore, De-M 10 @PDVB could be regenerated at 378 K, demonstrating its excellent regenerability at low temperature. The adsorption mechanism of toluene on De-M 10 @PDVB could be attribute to the π-π stacking interaction between the benzene ring of toluene with H 3 BTC and adsorption sites offered by the incorporation of H 2 DL in the framework of MIL-100(Cr) according to XPS analysis. Our finding provided a novel strategy by constructing defective MIL-100(Cr) and introducing PDVB to enhance efficient adsorption for toluene capture even in humid air.
研究领域:
材料科学
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环境科学
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化学工程
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
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2022
·Vol. 46
·期 10
·4806-4813
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IF 3.925
Jie Song,Leilei Sun,Hongchao Geng,Wenlong Tan,Deshuai Zhen,Qingyun Cai
β-Phase NaYF4:Yb,Tm,Gd up-conversion nanorods (UCNRs) with high uniformity were synthesized by a solvothermal method. The optimal fluorescence intensity of UCNRs was explored. After further modification with Materials of Institute Lavoisier-100(Fe) (MIL-100(Fe)) by the layer-by-layer self-assembly method, near-infrared light-triggered UCNR@MIL-100(Fe) nanomaterials with excellent antibacterial performances were constructed. A core–shell structure was constructed and confirmed by transmission electron microscopy (TEM). Reactive oxidizing species (ROS) detection indicated that the nanomaterials owned good photodynamic efficacy. The antibacterial experiments showed that the nanomaterials with 980 nm light irradiation and hydrogen peroxide (H2O2) had good antibacterial activity against Gram-negative and Gram-positive bacteria. Under 980 nm laser excitation, UCNRs generated ultraviolet and visible light to activate MIL-100(Fe) and induced a photo-Fenton reaction, which further produced oxygen species for antibacterial applications.
研究领域:
纳米技术
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材料科学
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生物医学工程
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化学
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微生物学
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
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IF 5.4
Zhengang Bu,Jianhua Li,Siqi Fang,Yuanlin Zhan,Wenzhuo He,Yibin Huang
The uniform and stable deposition of metal-organic frameworks (MOFs) onto membranes without compromising their performance presents a significant challenge. This study reports the fabrication of a photocatalytic self-cleaning membrane using hydrothermal and photochemical substitution methods. These methods enabled the uniform and stable deposition of β-FeOOH nanorods, m-MIL-100(Fe), and Ag nanoparticles (NPs) not only on the members surface but also throughout the interior of polyvinylidene fluoride (PVDF) membrane pores. The synergistic effect of these materials and their uniform and stable distribution within the PVDF membrane resulted in superior photocatalytic efficacy. The membrane's excellent photocatalytic performance facilitated the degradation of most pollutants, ensuring prolonged usage. Unlike other photocatalytic membranes requiring additional cocatalysts, our membrane degraded over 90% of various dyes without H 2 O 2 , demonstrating a greener usage mode and higher photocatalytic efficiency. The valence band (VB) and conduction band (CB) of β-FeOOH nanorods and m-MIL-100(Fe) were calculated, confirming the existence of a type-II heterojunction for the first time. Free radical trapping experiments identified hydroxyl radicals (·OH) as the primary reactive species in the degradation process. This research provides a novel approach to uniformly and stably load MOFs on membranes, enhancing their properties and offering insights into fabricating multifunctional photocatalytic membranes.
研究领域:
材料科学
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环境工程
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化学工程
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2015
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IF 4.097
Dongfang Wang,Yingchang Ke,Di Guo,Hongxu Guo,Jianhua Chen,Wen Weng
A metal-organic frameworks (MOFs), cauliflower-like MIL-100(Cr), has been facilely prepared through simple reflux method for the first time and characterized by XRD, FT-IR, SEM and XPS. The MOFs was found to be useful for the simultaneous and selective electrochemical detection of microgram Cd(II), Pb(II), Cu(II), and Hg(II) in aqueous solution. The detection was performed by the square wave anodic stripping voltammetry (SWASV). The MIL-100(Cr) modified electrode showed an excellent selectivity and stability for Cd 2+ , Pb 2+ , Cu 2+ , Hg 2+ determinations. The electrochemical properties and applications of the modified electrode were studied. Operational parameters such as pH, deposition potential and deposition time were optimized for the purpose of determination of traces of metal ions .
研究领域:
材料科学
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分析化学
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DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
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2020
·Vol. 27
·期 30
·37839-37851
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IF 3.056
Xu Jun,Xu Jinmei,Jiang Shanqing,Cao Yu,Xu Kailin,Zhang Qiuya,Wang Liping
In this work, a novel visible light–driven heterostructure Ag 3 PO 4 /MIL-100(Fe) composite photocatalyst was successfully synthesized via facile chemical deposition method at room temperature. Especially when the mass ratio of Ag 3 PO 4 was 20% of MIL-100(Fe) (APM-2), it displayed the best photocatalytic performance, for which the degradation rate of tetracycline (TC) in conventional environment was 6.8 times higher than that of bare MIL-100(Fe). In addition, the effects of the initial concentration and pH of the solution on the degradation of tetracycline were also studied, and the results showed that the degradation of tetracycline was more favorable in a weakly alkaline environment. The excellent performance of Ag 3 PO 4 /MIL-100(Fe) composites was attributed to the fact that on the basis of having adequate photocatalytic active sites, modifying MIL-100(Fe) with an appropriate amount of Ag 3 PO 4 particles can more effectively separate photogenerated electron–hole pairs. Five cycles of experiments showed that APM-2 has good photostability. Lastly, it was proved through quenching experiments that •O 2 − , h + , and •OH all played corresponding roles in the degradation process, and a possible Z-scheme heterostructure photocatalytic degradation mechanism was proposed.
研究领域:
材料科学
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环境科学
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化学
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DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
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2023
·Vol. 58
·期 31
·12596-12610
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IF 4.5
Liu Jun,Wang Hui,Chang Meng-Jie,Li Wen-Juan,Bai Ge,Xie Heng-Xue,Li Xin,Du Hui-Ling,Song Shi-Jie
MIL-100(Fe) has been demonstrated as a commonly used photocatalyst but is limited by the deficient charge separation efficiency and difficult recovery. In this work, by taking advantages of the strong plasmonic absorption and electron conductivity of Ag nanoparticles, as well as the fast magnetic response of the Fe 3 O 4 , core/shell Ag/Fe 3 O 4 @MIL-100(Fe) (AFM) was facilely prepared by a direct hydrothermal reaction between H 3 btc and Ag/Fe 3 O 4 (AF) for photo-Fenton degradation of RhB assisted by H 2 O 2 . Specifically, the Fe 3 O 4 in AF acted as both ion precursor and protector to inhibit Ag aggregation to obtain uniform and dispersed core/shell AFM. By adjusting the MIL-100(Fe) thickness and the Ag proportion, the optimum AFM exhibits superior photo-Fenton activity to decompose 88.5% RhB within 30 min under visible-light irradiation and H 2 O 2 addition, which is much higher than that of AFM in the presence of either light (58.5%) or H 2 O 2 (46.6%) due to the synergistic effects of visible-light absorption by MIL-100(Fe) and ·OH generation from H 2 O 2 . Moreover, the catalyst can be collected conveniently for its strong magnetic responsibility. This work may be beneficial to the development of effective photo-Fenton catalysts. Graphical abstract A novel magnetically recyclable Ag/Fe 3 O 4 @MIL-100(Fe) with special core/shell structure was facilely synthesized by hydrothermal method with superior photo-Fenton activity for dye degradation.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
Journal of Food Measurement and Characterization
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2023
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IF 3.4
Du Juan,Liu Kai,Liu Jialei,Zhao Dianbo,Bai Yanhong
Herein, a novel core-shell material Fe 3 O 4 @MIL-100(Fe) was synthesized for developing a novel LFIA by a two-step solvothermal method with good magnetic properties and high specific surface area. It was used as both magnetic separation and label agents in LFIA for the detection of Listeria monocytogenes . The enrichment of target bacteria can be achieved quickly and easily by direct adsorption of Fe 3 O 4 @MIL-100(Fe) on the bacteria and by the action of an applied magnetic field. It was beneficial in separation and concentration of target bacteria from food samples. The Fe 3 O 4 @MIL-100(Fe)-bacterial was then detected by the anti- Listeria monocytogenes antibody on the T line under the capillary action of the LFIA strip, resulting in the formation of a visible orange band. Under the optimal conditions, there was a good linear relationship between the intensity of the T line and the quantity of Listeria monocytogenes in the range of 10 5 -10 8 CFU mL − 1 , with a visual detection limit of 3.3 × 10 6 CFU mL − 1 . The strip showed strong specificity for L. monocytogenes , and the detection could be finished in 45 min, without the needing of pre-treatment. Thus, the proposed Fe 3 O 4 @MIL-100(Fe)-based strip was simple prepared, label-free, low cost, rapid and convenience.
研究领域:
分析化学
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微生物学
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食品科学
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DOI
高影响因子
TALANTA
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2017
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IF 4.162
Yun Lei,Beibei Chen,Linna You,Man He,Bin Hu
Polydimethylsiloxane (PDMS)/MIL-100(Fe) coated stir bar was prepared by sol gel technique, and good preparation reproducibility was achieved with relative standard deviations (RSDs) ranging from 2.6% to 7.5% (n=7) and 3.6% to 10.8% (n=7) for bar-to-bar and batch-to-batch, respectively. Compared with commercial PDMS coated stir bar (Gerstel) and PEG coated stir bar (Gerstel), the prepared PDMS/MIL-100(Fe) stir bar showed better extraction efficiency for target triazines compounds. It also exhibited relatively fast extraction/desorption kinetics and long lifespan. Based on it, a method of PDMS/MIL-100(Fe) coated stir bar sorptive extraction (SBSE)-high performance liquid chromatography-ultraviolet detector (HPLC-UV) was developed for the determination of six triazines (simazine, atrazine , prometon , ametryn , prometryne and prebane) in environmental water samples. Several parameters affecting SBSE of six target triazines including extraction time, stirring rate, sample pH, ionic strength , desorption solvent and desorption time were investigated. Under the optimal experimental conditions, the limits of detection (LODs, S/N=3) were found to be in the range of 0.021–0.079 μg L −1 . The repeatability RSDs were in the range of 2.3–6.3% (n=7, c=0.5 μg L −1 ) and the enrichment factors (EFs) ranged from 51.1 to 102-fold (theoretical EF was 200-fold). The proposed method was applied to the analysis of target triazines in environmental water samples, with recoveries of 98.0–118% and 94.0–107% for spiked East Lake water and local pond water samples, respectively.
研究领域:
分析化学
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环境科学
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DOI
PubMed
高影响因子
Nano Research
·
2015
·Vol. 8
·期 10
·3237-3249
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IF 7.01
Liang Ruowen,Jing Fenfen,Shen Lijuan,Qin Na,Wu Ling
Proper design and preparation of high-performance and stable dual functional photocatalytic materials remains a significant objective of research. In this work, highly dispersed noble-metal nanoparticles (Au, Pd, Pt) were immobilized on MIL-100(Fe) (denoted M@MIL-100(Fe)) using a facile room-temperature photodeposition technique. The resulting M@MIL-100(Fe) (M = Au, Pd, and Pt) nanocomposites exhibited enhanced photoactivities toward photocatalytic degradation of methyl orange (MO) and reduction of heavy-metal Cr(VI) ions under visible-light irradiation (λ ≥ 420 nm) compared with blank-MIL-100(Fe). Combining these results with photoelectrochemical analyses revealed that noble-metal deposition can effectively improve the charge-separation efficiency of MIL-100(Fe) under visible-light irradiation. This phenomenon in turn leads to the enhancement of visible-light-driven photoactivity of M@MIL-100(Fe) toward photocatalytic redox reactions. In particular, the Pt@MIL-100(Fe) with an average Pt particle size of 2 nm exhibited remarkably enhanced photoactivities compared with those of M@MIL-100(Fe) (M = Au and Pd), which can be attributed to the integrative effect of the enhanced light absorption intensity and more efficient separation of the photogenerated charge carrier. In addition, possible photocatalytic reaction mechanisms are also proposed.
研究领域:
材料科学
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环境科学
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化学工程
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DOI
高影响因子
MICROCHEMICAL JOURNAL
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2022
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IF 5.304
Mingchun Lv,Da-Wen Sun,Hongbin Pu,Haofan Zhu
Recyclable surface-enhanced Raman scattering (SERS) substrates are beneficial to cost reduction and environmental protection and have always been a research topic with great interest. Herein, a core–shell-satellite structured SERS substrate Fe 3 O 4 @MIL-100(Fe)@Ag nanoparticles (FMAs) was developed, possessing versatile functionalities of adsorption, detection, degradation and recovery. Results showed that the MIL-100(Fe) with peroxidase-like activity as shell catalyzed H 2 O 2 to generate ·OH degraded pollutants within 5 min to achieve substrate cleaning, making FMAs recyclable for at least 5 times to sequentially detect different cationic dyes with high sensitivity, having low detection limits as low as 15.24 ng/L, 387.87 ng/L and 0.71 ng/g for crystal violet in deionized water, aquaculture water and tilapia, respectively. FMAs also showed good uniformity, reproducibility and stability, with a relative standard deviation value of 5.58 % between substrates and about 78.60 % SERS activity remained after 20 d storage at 4 °C. This FMAs substrate thus has great potential for selective detection of trace cationic dyes in food or other fields.
研究领域:
环境科学
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材料科学
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分析化学
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DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2024
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IF 20.2
Jianxin Zhu,Haiyang Liu,Haijun Chen,Xiuyi Hua,Deming Dong,Dapeng Liang,Zhiyong Guo,Na Zheng
Low degradation efficiency and significant transition metal leaching are two challenges in persulfate activation systems based on metal-organic frameworks (MOFs) for organic pollutant degradation. Here, the challenges were solved by designing and synthesizing a micron-sized core-shell material, γ-Al 2 O 3 -C-MIL-100(Fe) (γACM), by coating the γ-Al 2 O 3 core with carbon (γ-Al 2 O 3 -C) and futher modifying with MIL-100(Fe). Testing γACM with sulfamethazine (SMZ) demonstrated its outstanding peroxydisulfate (PDS) activation, achieving 92.5 % SMZ removal within 20 min at a low oxidant/pollutant ratio. Fe leaching from γACM was effectively inhibited, with only 3.59 % Fe lost after three recycles. The system showed adaptability across a wide pH range, and usability in sewage effluent, indicating promise for practical application. The hydrophobicity of γ-Al 2 O 3 -C, the coordinatively unsaturated sites in MIL-100(Fe), and the strong bounding of MIL-100(Fe) on γ-Al 2 O 3 -C ensured the effective SMZ gather, PDS activation, and Fe stability respectively, which led to the excellent performances of γACM.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
危险品化学品经营许可证（带存储）