JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Yanyu Song,Xianbo Sun,Long D. Nghiem,Jun Duan,Wen Liu,Yongdi Liu,Zhengqing Cai
Building a heterojunction is a fascinating option to guarantee sufficient carrier separation and transfer efficiency, but the mechanism of charge migration at the heterojunction interface has not been thoroughly studied. Herein, MIL-53(Fe)/Bi 4 O 5 I 2 photocatalyst with a Z-scheme heterojunction structure is constructed, which achieves efficient photocatalytic decontamination under solar light. Driven by the newly-built internal electric field (IEF), the formation of Fe-O-Bi electron migration channel allows for rapid separation and transfer of charge carriers at the heterojunction interface, confirmed by the material characterization and density functional theory (DFT) calculation. The narrower band gap and improved visible light response also contribute to the enhanced photocatalytic activity of composite materials. With levofloxacin as the target pollutant, the optimal MIL-53(Fe)/Bi 4 O 5 I 2 achieves complete removal of pollutant within 150 min, the photocatalysis rate of which is ca. 4.4 and 26.0 times that of pure Bi 4 O 5 I 2 and MIL-53(Fe), respectively. Simultaneously, the optimal composite material exhibits satisfactory photodegradation of seven fluoroquinolones, and the photocatalysis rates are as follows: lomefloxacin > ciprofloxacin > enrofloxacin > norfloxacin > pefloxacin > levofloxacin > marbofloxacin. DFT calculations reveal a positive relationship between degradation rate and Fukui index (ƒ 0 ) of main carbon atoms in seven fluoroquinolones. This study sheds light on the existence of electron migration channels at Z-scheme heterojunction interface to ensure sufficient photoinduced carrier transfer, and reveals the influence of pollutant structure on photolysis rate.
研究领域:
材料科学
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环境科学
·
化学
·
光化学
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产品关联
DOI
PubMed
高影响因子
TALANTA
·
2017
·
IF 4.162
Guihua Gao,Sijia Li,Shuo Li,Yudan Wang,Pan Zhao,Xiangyu Zhang,Xiaohong Hou
In this work, computational and experimental methods were used to study the adsorption of estrogens and glucocorticoids on metal–organic frameworks (MOFs). Computer-aided molecular simulation was applied to predict the adsorption of eight analytes on four MOFs (MIL-101(Cr), MIL-100(Fe), MIL-53(Al), and UiO-66(Zr)) by examining molecular interactions and calculating free binding energies. Subsequently, the four water-stable MOFs were synthesized and evaluated as adsorbents for the target hormones in aqueous solution. As the MOF exhibiting the highest adsorption capacity in both computations and experiments, MIL-53(Al) was chosen as a sorbent to develop a dispersive micro-solid-phase extraction procedure coupled to ultra-performance liquid chromatography tandem mass spectrometry for simultaneous determination of the target analytes in water and human urine samples. Experimental parameters affecting the extraction recoveries, including pH, ionic strength , MIL-53(Al) amount, extraction time, desorption time, and desorption solvent, were optimized. The optimized method provided a linear range of 0.005025–368.6 μg/L with good correlation coefficients (0.9982 ≤ r 2 ≤ 0.9992), and limits of detection (S/N = 3) and quantification (S/N = 10) of 0.0015–1.0 μg/L and 0.005–1.8 μg/L, respectively. The analyte recoveries were in the range of 80.6–98.4% in water samples and 88.4–93.2% in urine samples. Furthermore, MIL-53(Al) showed good stability over 10 extraction cycles (RSD < 10.0%). Good agreement between experimental measurements and computational results showed the potential of this approach for elucidating adsorption mechanisms and predicating extraction efficiencies for MOFs and targets, providing new directions for the development and utilization of MOFs.
研究领域:
环境科学
·
分析化学
·
计算化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2023
·
IF 9.5
Rehan Khan,Wei-Min Liu,Ihtisham Ul Haq,Hong-Gang Zhen,Heng Mao,Zhi-Ping Zhao
Pyridine is generally found in the effluents from the synthesis of paints, rubber chemicals, vitamins, and pesticides. This study focused on improving the pervaporation (PV) performance of polyether block-amide (PEBA-2533) membranes cast on polyvinylidene fluoride (PVDF) substrate, by incorporating the MIL-53 (Al) particles to prepare mixed matrix membranes (MMMs) for pyridine separation from the aqueous solution. MIL-53 (Al) has a larger aperture size (8.5 Å) than the molecular size of the pyridine (6.0 Å), which could allow pyridine molecules to efficiently pass through its channels. The coadjacent MIL-53 particles created relatively continuous permeation pathways for the penetrants in the MMMs, which substantially enhanced the separation performance. Impressively, the resultant MMMs displayed superior pyridine separation performance at complex conditions. At 65 °C and 0.5 wt% pyridine aqueous solution, the separation factor and pyridine flux of PEBA/PVDF membrane were 17.3 and 143.5 g m −2 h −1 , which were improved using MIL-53@PEBA/PVDF MMMs to 48.1 and 226.9 g m −2 h −1 , respectively. Owing to the enhanced pyridine affinity, hydrophobic property, and thermal robustness, the resultant MMMs overcame the inherent trade-off between selectivity and permeability, and also displayed the promising long-term stability. These findings may provide valuable insights for developing novel MMMs with superior separation performance.
研究领域:
材料科学
·
化学工程
·
膜技术
·
分离过程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2019
·
IF 6.361
Jiping Ma,Shuang Li,Gege Wu,Shasha Wang,Xiaotong Guo,Liyan Wang,Xiaoyan Wang,Jinhua Li,Lingxin Chen
Novel mixed-matrix membranes (MMM) were prepared from metal-organic frameworks (MOF) (MIL-53) and poly (vinylidene fluoride) (PVDF), viz MIL-53–PVDF MMM, for the simultaneous dispersion membrane extraction (DME) of seven sulfonylurea herbicides (SUs) in aqueous environments followed by high performance liquid chromatography (HPLC) determination. The MIL-53–PVDF MMM was well characterized and major factors influencing DME performances were systematically investigated including membrane type, MOF dosage, eluent type, solution pH, extraction/elution time and salinity, etc. Under optimal conditions, the MIL-53–PVDF MMM based DME coupled with HPLC exhibited excellent linearity within 0.03–10 μg L −1 for chlorimuronethyl and 0.01–10 μg L −1 for other six SUs individual. High enrichment factor of 250 was obtained, as well as low detection limits and quantification limits ranged from 3.75 to 10.30 ng L −1 and 12.49–34.30 ng L −1 , respectively. Furthermore, the method attained high recoveries of 77.20–111.00% at three spiking levels of SUs, with relative standard deviations of 1.28–14.67% in tap water, seawater and surface water samples. Additionally, the MMM was readily separated from water and well regenerated, and could keep about 80% recovery after 25 cycles. Compared to that reported extraction materials, the MIL-53–PVDF MMM possessed the advantages of high enrichment ability, excellent reusability, good practicality and easy separation, indicating it was a promising alternative for the enrichment of SUs from aqueous environments.
研究领域:
环境科学
·
分析化学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MATERIALS LETTERS
·
2019
·
IF 3.019
Xin Li,Jin Zhang,Wanling Shen,Shutao Xu
MIL-53(Cr) is a well-known and important metal-organic framework material. However, the long synthesis time of MIL-53(Cr) restricts its applications. Herein, we report a facile method to kinetically modulate the crystallization route and decrease the synthesis time of 72 to only 8 h by simply increasing the usage of HF.
研究领域:
材料科学
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无机化学
·
纳米技术
✓ 已验证
DOI
高影响因子
TURKISH JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 4
·1281-1290
·
IF 1.151
WANG JI,WANG QINGYIN,WANG GONGYING
Poly(ethylene terephthalate) (PET) is one of the world's five major engineering plastics and is widely used in various fields. At present, the main catalysts used in the synthesis of PET are antimony, titanium, and aluminum metal compounds. Among them, antimony-based catalysts are poisonous and the titanium-based catalyst products are relatively yellow in hue. The aluminum-based catalyst has the advantages of low price and environmental friendliness, but current research shows that the organoaluminum catalyst has the problem of hydrolysis, and MIL-53 (Al) has good stability and will not affect the environment, so we add a catalyst before the esterification reaction, and uses thermogravimetric analysis (TGA), X-ray diffraction (XRD), scanning electron microscope (SEM), and N2 low-temperature physical adsorption characterizes the thermal stability and structure of MIL-53(Al). At the same time, the effects of different content, polycondensation time, before and after activation and polycondensation temperature on the properties of PET were investigated. The research results show that when the molar content of catalyst is 0.05% and the reaction temperature is 280 oC for 150 min, the product obtained is relatively excellent. The catalytic activity has almost no effect before and after activation, indicating that the polycondensation reaction is carried out on the surface of the catalyst. Therefore, MIL-53 (Al) has great potential in PET industrial catalysis.
✓ 已验证
DOI
高影响因子
Nano Research
·
2024
·Vol. 17
·期 7
·5863-5871
·
IF 9.5
Ke Yanjing,Zhang Jiaxing,Peng Xin,Zhang Zhiyi,Wang Xu,Qi Wei,Wang Mengfan
Recently, many efforts have been dedicated to construct artificial catalysts with enzyme-like activity. However, it is still a big challenge to endow artificial catalysts with specific substrate selectivity. In this study, we developed a facile strategy to construct a MIL-53(Fe)-based nanocatalyst with designable selectivity in the degradation of oxytetracycline (OTC). Through the Fe–O–P conjunction, oxytetracycline aptamer (OA) can be easily anchored on MIL-53(Fe) to provide the specific site for OTC binding. We verified that the obtained MIL-53(Fe)-Apt nanocatalyst displayed enhanced catalytic ability in the degradation of OTC, whereas obvious suppression toward other substrate analogues. This performance therefore brings about an anticipated selectivity toward OTC. Moreover, we highlighted that the configuration of aptamers on MIL-53(Fe) can be modulated through varying conjunction mode. Structure–function analysis revealed that aptamer configuration affects the local concentration of substrate around catalytic site, which thus decides the catalytic performance toward OTC. This work presented a facile and promising strategy for developing artificial catalysts with designable selectivity.
研究领域:
环境科学
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催化化学
·
生物技术
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产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2016
·
IF 4.758
Chang Liu,Bing Yan
MIL-53-L was made from a metal-organic framework which was synthesized using pyrene-functionalized organic as building block. This ligand has framework construction, detecting and fluorophore parts. The flourescence property of MIL-53-L changed by space limitations within the metal organic frameworks structure to detect of Cu 2+ ion.
研究领域:
材料科学
·
分析化学
✓ 已验证
DOI
高影响因子
Energy Advances
·
2024
·
IF 3.2
Kunpeng Liu,Xu Wang,Nan Wang,Ruiyong Zhang,Meinan Yang,Baorong Hou,Wolfgang Sand
Rationally designing high-efficiency catalysts for electrochemical two-electron water oxidation reaction (2e− WOR) to produce hydrogen peroxide (H2O2) is extremely important, while designing bimetallic metal–organic frameworks (MOFs) is of great significance for effective 2e− WOR. Herein, MIL-53(Fe) and different proportions of Co-doped MIL-53(Fe) were prepared by a hydrothermal method. The structural characterization and elemental analysis showed that the Co ions were successfully doped into MIL-53(Fe) to form a MIL-53(Fe/Co) bimetallic MOF, and the morphology of MIL-53(Fe/Co) became more regular after Co doping. We found that the optimized MIL-53(Fe/Co) exhibits remarkable 2e− WOR performance, which gave an overpotential of 150 mV at 1 mA cm−2. The overpotential of MIL-53(Fe/Co) was approximately 220 mV (at 1 mA cm−2) lower than that of MIL-53(Fe), which may be attributed to the change of microstructure of MIL-53(Fe) after Co doping and the synergistic effect between Fe/Co. Our work introduces a strategy for designing bimetallic MOF-based electrocatalysts, opening up new possibilities for efficient 2e− WOR systems.
研究领域:
材料科学
·
电催化
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2021
·
IF 7.514
Kuiyu Yi,Lei Zhang
An ingenious nanoscale fluorescent sensor derived from Eu 3+ -postfunctionalized MIL-53 (Al) (Eu 3+ @MIL-53 [Al]) was fabricated though a simple and effective approach. Malachite green (MG) effectively turned off the luminescence of Eu 3+ @MIL-53 (Al) via fluorescence resonance energy transfer (FRET), thus enabling MG sensing. The developed probe exhibited instantaneous reusability after being cleaned with deionized water. The fluorescence intensity, quenching efficiency, and crystal structure of the recoverable sensor after five recycling processes were unchanged compared with those of the original sample. Moreover, the potential mechanism of MG detection was revealed in detail. This work represents the first attempt to determine MG in aquaculture water and products by using metal–organic frameworks (MOFs). The Eu 3+ @MIL-53 (Al) probe proved to be a remarkable fluorescence probe for MG with high selectivity, sensitivity, and excellent regeneration capability. It provides a promising functional platform for the recognition of illegal MG addition to aquaculture water and products.
研究领域:
材料科学
·
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CELLULOSE
·
2021
·Vol. 29
·期 1
·355-365
·
IF 5.044
Chen Jiahao,Li Huiqin,Zhu Hejin,Gong Jixian,Zhang Chunchun,Li Zheng,Li Qiujin,Liu Xiuming,Xu Jianlin,Zhang Jianfei
As an acoustic metamaterial, Metal–organic frameworks (MOFs) can absorb sound energy abnormally. In this research, a thin and flexible acoustic material was prepared by growing MOF on the fabric. The successful growth of MIL-53(Fe) on the fiber surface was confirmed by SEM, FTIR, XRD and XPS. From the sound absorption and sound insulation test results of MIL-53(Fe)@fabric, the in-situ growth of MIL-53(Fe) greatly improves the sound absorption and sound insulation performance of the fabric, and gives the fabric an abnormal acoustic effect. From the calculation results of the theoretical model, the growth of the sub-wavelength scale MIL-53(Fe) significantly increases the flow resistance of the fabric, which is the root cause of the abnormal sound absorption of the material. It is worth noting that the sound transmission loss of the prepared flexible material doesn’t follow the mass law and exhibits excellent sound insulation performance. This is not only related to the increase in the sound energy reflected by the fabric, but also to the abnormal sound absorption of MIL-53(Fe). Here, the sound insulation performance of MOFs@fabric is reported for the first time. This work promotes the research and application of MOFs in the field of acoustics, and provides a method and theoretical basis for the design and preparation of acoustic protection textiles. Graphical abstract
研究领域:
材料科学
·
声学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMISTRY OF MATERIALS
·
2022
·
IF 10.508
Dequan Jiang,Ting Wen,Yanzhen Guo,Jie Liang,Zimin Jiang,Chen Li,Ke Liu,Wenge Yang,Yonggang Wang
Anomalous compression behaviors such as negative linear compressibility (NLC) and negative area compressibility (NAC) are emerging functionalities essential for utilities under extreme conditions. Metal–organic frameworks (MOFs) present a large family of NLC/NAC materials under the well-recognized “wine-rack” mechanism. Nevertheless, the working pressure of MOFs is limited to typically no more than 3 GPa. Herein, we report the observation of a rare reentrant NLC behavior of MIL-53(Al) over an ultrawide pressure region up to 41.6 GPa. MIL-53(Al) with the classic wine-rack topology first exhibits an NLC behavior along the c-axis in the pressure region of 0–2.7 GPa, followed by a normal compression process between 2.7 and 12.9 GPa. After that, it is surprising to find that the reentrant NLC property remains at a record-high pressure (>40 GPa) among the previously reported MOFs. The mechanisms of the distinct compression behaviors of MIL-53(Al) in the three stages are studied by combining the X-ray diffraction analyses, Raman spectra, and DFT calculation. Particularly, the photoluminescence of Cr3+ is used as a unique probe for the subtle changes of the local coordination environments of Al3+ under compression. Both the absorption spectra and photoluminescence of Cr3+-doped MIL-53(Al) not only verify the three-stage compression processes but also reveal a hidden structural/electrical phase transition around 22.0 GPa. These findings provide an in-depth understanding of the structure–property relationship of abnormal compression behavior at the local-structure level.
研究领域:
材料科学
·
高压物理
·
无机化学
·
金属有机框架（MOFs）
·
凝聚态物理
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）