MICROCHEMICAL JOURNAL
·
2017
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IF 3.034
Jin Luo,Fujian Xu,Jing Hu,Ping Lin,Jiping Tu,Xi Wu,Xiandeng Hou
In this work, metal organic framework (MOF) UiO-66 with strong stability in water was synthesized and used for the preconcentration of ultratrace arsenic in environment water and the precipitated UiO-66 was converted to slurry for direct determination with hydride generation-atomic fluorescence spectrometry (HG-AFS). Factors affecting the adsorption of arsenic by UiO-66, including pH, adsorption time, stability of UiO-66, masking agents together with the optimum conditions of HG-AFS were investigated in detail. The performance of UiO-66 for adsorbing arsenic was excellent at room temperature over a wide range of pH from 1 to 11, and adsorption efficiencies of > 95% could be achieved within only 5 min. Meanwhile, since conventional digestion process is avoided, the slurry sampling method is fast and convenient with greatly reduced matrix interference. Under the optimum conditions, it shows a good linear relationship between AFS intensities (I) and the concentrations of arsenic (C) (I = 547C + 61) with linear correlation coefficients better than 0.99. A precision of 3% (RSD%, n = 11) at 1 ng/mL and a limit of detection (LOD) of 0.0002 ng/mL were obtained.
研究领域:
分析化学
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环境科学
✓ 已验证
DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
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2021
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IF 5.455
Jie Yang,Bo Ruan,Qin Ye,Lung-Chang Tsai,Ning Ma,Tao Jiang,Fang-Chang Tsai
Carbon dots (CDs) was synthesized by hydrothermal method using o -phenylenediamine. The fluorescence property can be used for metal ion sensing, but the solid-state aggregation caused quenching (ACQ) is the troublesome problem to develop the potential applications of carbon dots. Here, the metal-organic framework (MOF) as a host is not only used for restraining the ACQ effect of CDs but also can be constructed by the dual-emitting system (CDs@ZIF-8). Furthermore, CDs@ZIF-8 with dual-emitting centers can be utilized for detecting copper ions as a ratio fluorescence sensor. The CDs@ZIF-8 fluorescence sensor shows excellent sensitivity, selectivity and strong environmental suitability for sensing Cu 2+ ion with the limit of detection (LOD) for Cu 2+ ion is 11.712 μM. The CDs@ZIF-8 fluorescent probe was successfully applied to detect Cu 2+ ions in an aqueous solution. CDs@ZIF-8 shows a new possibility to fabricate fluorescent molecular probes for the determination of heavy metal ions, which is taken on anti-inference in pH, anion and other influence factors.
研究领域:
材料科学
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分析化学
✓ 已验证
DOI
高影响因子
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
·
2020
·Vol. 96
·期 3
·639-649
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IF 2.75
Shanshan Jiang,Jin Huang,Yue Wang,Shiyu Lu,Pei Li,Cuiqin Li,Feng Li
Abstact BACKGROUND Fe based metal organic frameworks (Fe-MOFs) were prepared by solvothermal method, and carbon loaded Fe 3 O 4 (Fe 3 O 4 /C) was prepared by pyrolytic carbonization and carbothermal reduction. RESULTS Various analytical techniques were used to characterize the physicochemical structure of Fe-MOFs and Fe 3 O 4 /C under different solvothermal and calcination conditions. Fe 3 O 4 /C was then employed as a catalyst for the catalytic transfer hydrogenation of furfural with alcohol as a hydrogen donor, and the effect of hydrogen donor species, reaction temperature, and reaction time were investigated. CONCLUSION The Fe 3 O 4 /C catalyst could be easily collected with a magnet and reused for four runs without significant loss of its catalytic. A possible mechanism for the catalytic transfer hydrogenation of furfural over Fe 3 O 4 /C was proposed. © 2020 Society of Chemical Industry (SCI)
研究领域:
化学工程
·
材料科学
✓ 已验证
DOI
高影响因子
MOLECULES
·
2022
·Vol. 27
·期 11
·3443
·
IF 4.927
Youjun Zhang,Licong Liu,Dixiong Yu,Jinglan Liu,Lin Zhao,Jinpeng Liu,Shuo Liu
A magnetic metal–organic framework nanocomposite (magnetic MIL-68(Ga)) was synthesized through a “one pot” reaction and used for heavy metal ion removal. The morphology and elemental properties of the nanocomposite were characterized by scanning electron microscopy (SEM), Fourier transform infrared (FT-IR), X-ray powder diffraction (XRD), as well as zeta potential. Moreover, the factors affecting the adsorption capacity of the nanocomposite, including time, pH, metal ion type and concentration, were studied. It was found that the adsorption capacity of magnetic MIL-68(Ga) for Pb2+and Cu2+was 220 and 130 mg/g, respectively. Notably, the magnetic adsorbents could be separated easily using an external magnetic field, regenerated by ethylenediaminetetraacetic acid disodium salt (EDTA-Na2) and reused three times, in favor of practical application. This study provides a reference for the rapid separation and purification of heavy metal ions from wastewater.Keywords:MOF;magnetic separation;heavy metal ions;adsorption
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2021
·
IF 3.764
Tongge Wang,Miao Chang,Tongan Yan,Yunpan Ying,Qingyuan Yang,Dahuan Liu
Sulfur hexafluoride (SF6), which has a greenhouse effect of 228 000 times more terrible than carbon dioxide, has attracted increasing attention. Its efficient capture, especially from the mixtures with low SF6 concentrations, is urgently needed while challenging. Herein, we use a calcium (Ca)-based metal–organic framework (MOF; SBMOF-1) with multiaromatic ring-functionalized channels to achieve a record selectivity as high as 727 for an industrially relevant SF6/N2 mixture (volume concentration of SF6: 0.03%) at 298 K and 1 bar. Grand canonical Monte Carlo simulations and density functional theory calculations identified that SF6 molecules were energy-favorably trapped in the functionalized MOF channels by the strong interactions between the channel walls and six fluorine atoms on SF6. Excellent breakthrough results accompanied with good stability and regenerability recommend its promising application for practical SF6 capture from low-concentration SF6 mixtures, which also provides a new benchmark for SF6/N2 separation.
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
高影响因子
CHEMOSPHERE
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2022
·
IF 8.943
Gongbo Li,Jiacheng Li,Shuo Zhang,Xiaoshu Hou,Xiang Liu,Qingchun Yu,Miao Li
The recovery and reuse of adsorbents is crucial for the effectiveness and sustainability of mitigation methods for groundwater pollution. Considering the difficulty in recovering powder materials and the low mechanical strength of membrane materials, we developed a sheet material with good recyclability and certain mechanical strength. In this study, an in situ synthesized MIL-100(Fe) film sample was produced by hydrothermal reaction using a commercially available iron mesh as the substrate. The MIL-100(Fe) samples were characterized by SEM , XRD, XPS , and FT-IR. The experiments showed that the material presented excellent removal ability toward Cr(VI) and good recovery performance. In the fourth cycle test, the Cr(VI) removal rate reached more than 95%. The material characterization and adsorption kinetics indicated that the removal mechanism was oxidation-reduction reaction and electrostatic adsorption. The removal experiments at different pH values and with different co-existing ions demonstrated that the material can maintain good removal capacity at pH values between 2 and 8, and common ions in groundwater can promote the removal of Cr(VI) under neutral conditions. The recycling test demonstrated that the sample can be reused. After the sample was recovered and calcined in an inert environment, a network sample containing zero-valent iron was obtained, and it removed Cr(VI) from water at a low pH in 20 min. This study provides a new alternative for the practical removal of Cr(VI) from groundwater.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Yi-Hu Ke,Xiao-Mei Yu,Xue Wang,Hai Liu,Hong Yuan
Accurately controlling the directional activation of the primary and secondary hydroxyls and preventing the deep oxidation of oxygen-containing functional groups and the degree of C–C cleavage is still a great challenge for the selective oxidation of glycerol to glyceric acid. Hence, a series of bimetallic Au-Pt/M x O y C z catalysts (M = Cu, Co, Ce, Mn, Ni, Zn, Zr) were prepared using MOFs-derived transition metal carbon-based compounds as the support. These catalysts were utilized for glycerol catalytic oxidation to glyceric acid under basic conditions. The experimental date indicated that the type of transition metal makes a big difference on the conversion of glycerol and the selectivity of glyceric acid under the mild condition of 60 ℃. Among them, the Mn-modified carbon-based compound supported Au-Pt/Mn x O y C z catalyst has the best catalytic activity. After reaction for 2 h, the conversion of glycerol could reach 100 %, and the selectivity of glyceric acid could reach 57.3 %. The reason for the best activity of the Au-Pt/Mn x O y C z catalyst is that the particle size of active molecules is small, and the strong metal-support interaction produces more active sites. Specifically, Au-Pt/Mn x O y C z catalyst forms an Au-Pt alloy, and the synergy between alloyed Au-Pt and Mn &+ enhances the acidity of the catalyst, causing it to produce the most acidic sites and promoting the dispersion of metal nanoparticles. The strong basic site of the catalyst can promote Au-Pt electron transfer, which in turn changes the reducing properties of Au-Pt and enriches the oxygen vacancies of the catalyst. Therefore, the synergistic interaction between the acidic sites and strong basic sites promotes the activation of Au-Pt, which in turn promotes the reduction of Mn-based oxides and the activation and migration of oxygen. This work will offer some new recommendations for the development of MOFs-derived transition metal-based catalysts for the catalytic oxidation of bio-polyols under mild conditions.
研究领域:
化学工程
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催化科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
FOOD CONTROL
·
2024
·
IF 5.6
Wenjie Lu,Xiaoli Dai,Renqing Yang,Zeyan Liu,Haili Chen,Yanfeng Zhang,Xinai Zhang
Pomegranate is very favored but highly susceptible to lead contamination that threatens consumer health, and thereby it is essential to establish efficient modes to monitor lead level in pomegranate. A specific and sensitive electrochemical sensor was developed for assessing lead pollution in pomegranate based on Pb 2+ -dependent DNAzyme as recognition receptor and metal-organic frameworks (MOFs) for signal output. Particularly, the used MOFs exhibited Fenton-like catalytic functions toward methylene blue (MB) as electroactive medium. Integrating with gold nanoparticles (AuNPs), the Fenton-like MOFs showed high sensitivity for electrochemical detection of Pb 2+ in pomegranate. Moreover, benefiting from the specific recognition of DNAzyme to Pb 2+ , the adjustable strategy was achieved, in which the approaching MB led to a higher signal with the absence of Pb 2+ while the detached MB gave rise to a lower signal with the presence of Pb 2+ . With the use of Fenton-like catalytic MOFs driving electrochemical aptasensing interface, this simplified detection pattern was endowed with sensitive assessment of lead pollution level in pomegranate, highlighting its promising potential in evaluating the safety of foodstuffs.
研究领域:
食品安全检测
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环境科学
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生物传感技术
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Xingyu Zhang,Lin Chen,Longjie Jiang,Liang Zhu,Chuqing Cao,Wei Zhang,Linting Zhao,Jiaqi Xu,Han Liu
In the advent of the new energy era, the global demand for lithium is increasing rapidly. The recovery of Li + and Co 2+ from the leachate of high-quality spent lithium-ion batteries (LIBs) offers significant economic and environmental benefits. This study proposes a TFC-ON-MOF membrane prepared through a combination of in situ growth and interfacial polymerization (IP) for the recovery of Co 2+ and Li + from battery leachate. Operated in an electrodialysis (ED) system, the experimental results demonstrated that the optimum Li + membrane flux was observed to reach 1.02 μmol cm −2 min −1 at 7.5 mA cm −2 , with the selectivity remaining at 19.84, which exemplifies well-separation and permeation performance. Following several operational cycles, the separation performance remained stable, and the membrane exhibited enhanced fouling resistance relative to commercial monovalent selective cation exchange membranes (CSO). The composite membrane features sub-nanometer windows and nanometer-sized cavities, enabling selective permeation of Li + while simultaneously sequestering Co 2+ . The inclusion of auxiliary permeation groups (PSS) also enhances overall permeation performance and selectivity. The findings contribute to the design of composite metal–organic frameworks and provide a novel approach for the selective separation of heavy metal ions from spent lithium batteries, thereby promoting the efficient recycling of valuable metal resources.
研究领域:
材料科学
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环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2024
·
IF 4.8
Yujun Wang,Peng Zhang,Chuantao Hou
The incorporation of various functional nanoentities into pure metal–organic framework (MOF) aerogels can not only introduce additional functionality but also expands the application scenarios of MOF aerogels. Herein, a general and simple strategy for uniform incorporation of various functional nanomaterials into a porphyrin MOF aerogel is presented. Specifically, this strategy primarily involves the introduction of a surfactant polyvinylpyrrolidone (PVP) to disperse the nanomaterials in lipophilic solvents, followed by a direct solvothermal reaction with the precursors of the porphyrin MOF aerogel. Additionally, uniform aerogel composites consisting of two MOF components have also been developed by careful optimizing the reaction conditions. The resulting nanoentity@MOF aerogel composites exhibit positive properties that stem from the synergistic effects between the nanoentities and MOF aerogel, offering advanced applications in areas such as photochemical electrochemistry, adsorption and photodegradation, electrochemical oxygen reduction reaction, and fluorescence.
研究领域:
材料科学
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化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2025
·
IF 11.3
Wen-Qiang Li,Yuan-Ming Li,Nannan Hou,Xiao-Guo Zhou,Yang Wang,Xian-Yang Shi,Yang Mu
The introduction of structural defects can improve the charge separation efficiency of metal-organic frameworks (MOFs)-based photocatalysts, which however come with suboptimal decontamination performance, due to steric hindrance and limited binding capacity of the involved modulators. In this work, hydroxyl group capturing the advantages of both worlds was utilized as new modulator to improve the photocatalytic performance of Fe-based defective MOFs. Benefited from its low steric effect and strong coordination bonding capability, hydroxyl-induced defects in Fe-MOF contributed to a nearly 8-fold increase of rate constant for the photocatalytic removal of hexavalent chromium (Cr(VI)) compared to that of pristine one, which also exceeded the defective one induced by acetic acid as modulator. A combination of characterizations and theoretical calculations suggests that hydroxyl-induced structural defects fostered faster kinetics of exciton dissociation and optimal charge separation. The higher electron utilization through hydrogen bonding interaction between these hydroxyl-induced structural defects and contaminant was further confirmed by ab initio molecular dynamics (AIMD) simulations. This work presents a simple yet robust strategy for the generation of defective MOFs, upon which efficient photoreduction systems toward Cr(VI) removal are anticipated.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2025
·
IF 4.7
Xiaojing Mao,Huachang Li,Yehong Shi,Jiemin Liu,Lijun Kuai,Jijun Liu,Yan Han,Yuexi Huang,Haijiao Xie
Two zinc-based metal-organic frameworks, namely [Zn(L 1 )(Phen)H 2 O] n ( 1 ) and {[Zn(L 2 )(Phen)]⋅(H 2 O)} n ( 2 ), were successfully constructed by mixed ligands strategy (HL 1 =1,4-benzendicarboxylic acid, Phen=1,10-phenanthroline monohydrate, HL 2 =5-hydroxyisophthalic acid), and characterized by X-ray single crystal diffraction, elemental analysis, powder X-ray diffraction (PXRD), etc. The X-ray single crystal diffraction demonstrate that both 1 and 2 show 1D chain structure. The orbital energies of 1, 2 and ligands have been investigated using the Density Functional Theory (DFT) calculations. The fluorescent sensing experimental revealed that both 1 and 2 exhibited excellent selectivity and sensitivity towards Cu 2+ and Co 2+ ions over other metal ions, and the detection limit (LOD) of Cu 2+ and Co 2+ for 1 were 0.077 μM and 0.15 μM, and the LOD of Cu 2+ and Co 2+ for 2 were 0.81 μM and 0.48 μM, respectively. In addition, the fluorescence quenching mechanism of Cu 2+ and Co 2+ can be attributed to energy competitive absorption. Furthermore, in the real sample detection, the recoveries of Cu 2+ and Co 2+ were 92.6 - 109.1 % and 96.7 - 110.0 %, respectively. This work provided a reliable method for the quantitative detection of Cu 2+ and Co 2+ and was successfully applied in river water with satisfactory recovery and precision.
研究领域:
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）