ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
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2023
·Vol. 30
·期 25
·67647-67661
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IF 5.8
Zhang Xiansheng,Liu Zhifeng,Shao Binbin,Wu Ting,Pan Yuan,Luo Songhao,He Miao,Ge Lin,Sun Jingwen,Cheng Chunyun,Huang Jian
Zirconium-based porphyrin metal organic frameworks (Zr-PMOFs) had attracted attention in the field of photocatalysis in recent years. However, the recombination of photogenerated carriers of monomer PMOF limits its performance of photocatalytic organic pollutants degradation. Metal sulfide has a suitable visible band gap, which can form a heterojunction with MOF materials to enhance the photocatalytic efficiency of MOF. Therefore, a typical metal sulfide semiconductor ZnIn 2 S 4 (ZIS) was introduced into a Zr-MOF (MOF-525) by solvothermal method to prepare a series of ZIS/MOF-525 (ZIS/MOF-525–1, ZIS/MOF-525–2, ZIS/MOF-525–3 and ZIS/MOF-525–4) composite photocatalysts in this work. The results of characterization analysis, optical analysis and electrochemical analysis showed that the interface of ZIS/MOF-525 formed a typical type-II heterojunction, which accelerated the electron transport rate and effectively inhibited the recombination of photogenerated e − and h + in MOF-525. The optimal removal efficiency of tetracycline (TC) by ZIS/MOF-525–3 (the mass of MOF-525 is 30 mg) reached 93.8% under 60 min visible light illumination, which was greater than that of pure MOF-525 (37.2%) and ZnIn 2 S 4 (70.0%), and it still maintained good stability after five cycles reusing experiment. This work provides feasible insight for the preparation of novel and efficient PMOF-based photocatalysts in the future.
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INORGANIC CHEMISTRY COMMUNICATIONS
·
2023
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IF 3.8
Fuhua Wei,Haiyan Liu,Qinhui Ren,Lu Yang,Lan Qin,Hongliang Chen,Yufu Ma,Zhao Liang,Siyuan Wang
Zr-MOF was prepared under solvothermal conditions using zirconium acetate as the metal ion and 2,5-dihydroxyterephthalic acid as the organic ligand. It was characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), and thermogravimetry (TG). Zr-MOF was used as an adsorbent to remove norfloxacin from aqueous solutions. The experimental results were fitted, and the results showed that the pseudo-second-order kinetics model was appropriate for studying the removal of norfloxacin. We investigated the adsorption capacity of Zr-MOF under different masses, concentrations, and pH values. At pH 10, the maximum adsorption capacity after 5 h was 134.5 mg/g.Compared with another adsorbent,the adsorption capacity of Zr-MOF was higher.The removal of norfloxacin from an aqueous solution using Zr-MOF was feasible, inexpensive, and effective. Our findings indicate that Zr-MOF has broad application prospects for the purification of an aqueous solution.
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Haifei An,Weijian Tian,Xin Lu,Huanmei Yuan,Liyun Yang,Hao Zhang,Haoming Shen,Hao Bai
Adsorbents with high adsorption capacity and high selectivity are crucial for carbon capture, utilization and storage (CCUS) technology applied to industrial flue gas to reduce carbon emissions. In this paper, a defect-rich hierarchical porous Mg-MOF-74 was synthesized successfully with MgCl 2 ·6H 2 O used as a metal source considering that the weak coordination of Cl − may interfere with the normal coordination process of metal centers and organic ligands, which causes the formation of crystal defects. Through the analysis of a series of characterizations, ligand deletion of Mg-MOF-74 prepared with MgCl 2 ·6H 2 O was confirmed, and the deleted ligand was estimated to be approximately 20% compared with the traditional Mg-MOF-74 prepared with Mg(NO 3 ) 2 ·6H 2 O, which led to mesopores accounting for 36.9%, and the width of mesopores reached 13.1 nm. Compared with traditional Mg-MOF-74, the adsorption heat of CO 2 at zero load of the defect-rich hierarchical porous Mg-MOF-74 increased from 36 kJ·mol −1 to 46 kJ·mol −1 , and the saturated adsorption capacity of CO 2 under ambient pressure was improved by 15%. Interestingly, the IAST selective adsorption performance of CO 2 /N 2 was increased by 20 times. Compared with the saturated adsorption capacity for traditional Mg-MOF-74, the equivalent adsorption capacity of hierarchical porous Mg-MOF-74 only needs 17 kPa, indicating that it is suitable for carbon capture operation in a real flue environment. Calculations of density functional theory (DFT) confirmed that the active site of the hierarchical porous Mg-MOF-74 has a lower adsorption energy with CO 2 due to the presence of defects, which is regarded to play a key role in improving the CO 2 capture performance.
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CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2023
·
IF 3.8
Jitong Deng,Yongjun Zhang,Xiaopeng Wang,Wei Zhang,Hongjing Han,Haiying Wang,Huimin Yuan,Yanan Zhang,Yanguang Chen
The effective utilization of natural gas resources is a promising option for the implementation of the “dual carbon” strategy. However, the capture of carbon dioxide with relatively lower concentration after the combustion of natural gas is the crucial step. Fortunately, the lattice oxygen is used for chemical cycle conversion of methane to overcome the shortcomings mentioned above. A method was proposed to synthesize perovskite for methane cycle conversion using meatl organic framework as a precursor. Morphology and pore structure of Fe 2 O 3 -LaFeO 3 composite oxides were regulated by precursor synthesis conditions and calcination process. Moreover, the chemical looping conversion performance of methane was evaluated. The results showed that the pure phase precursor of La[Fe(CN) 6 ]·5H 2 O was synthesized with the specific surface area of 23.91 m 2 ·g −1 under the crystallization of 10 h and the pH value of 10.5. Fe 2 O 3 -LaFeO 3 was obtained by controlled calcination of La[Fe(CN) 6 ]·5H 2 O and Fe 2 O 3 with variable mass ratio. The selectivity of CO 2 can reach more than 99% under the optimal parameters of methane chemical looping conversion: m (Fe 2 O 3 ): m (LaFeO 3 ) = 2:1, the reaction temperature is 900 °C, the lattice oxygen conversion is less than 40%. Fe 2 O 3 -LaFeO 3 still has good phase and structure stability after five redox reaction and regeneration cycles.
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ELECTROCHIMICA ACTA
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2023
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IF 6.6
Rui Zhao,Huimin Ren,Yubing Si,Gang Li,Yongzhu Fu
Phenyl tetrasulfide (PTS) is a high-capacity cathode material for lithium batteries. However, it also suffers the shuttle effect of polysulfides to the lithium anode in the charge because some lithium polysulfides are still formed due to the middle sulfur atoms in the structure of PTS. The separator modification is considered as a convenient and effective strategy to reduce the shuttle effect. In this report, metal-organic framework (MOF)-801(Ce) is synthesized and coated on a polypropylene separator (MOF-801(Ce)−PP) as a polysulfide barrier. MOF-801(Ce) has a pore size of 6 Å, which is smaller than the sizes of lithium thiophenolate and lithium polysulfides. Therefore, the MOF-801(Ce)−PP can effectively inhibit the migration of active species to the lithium metal anode without affecting the passage of lithium ions. Consequently, the Li/PTS cell with the MOF-801(Ce)−PP exhibits a discharge capacity of 340.8 mAh g −1 at 0.5 C after 250 cycles, which is better than the control cell. Even when the PTS areal mass loading is 5.4 mg cm −2 , the cell with the MOF-801(Ce)−PP can still deliver a high specific capacity of 430 mAh g −1 at 0.5 C rate. This study proves a feasible strategy to overcome the polysulfide shuttle issue of organosulfide cathode materials.
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Sustainable Chemistry and Pharmacy
·
2023
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IF 6
Qiuyun Zhang,Yanting Lei,Luyan Li,Jiao Lei,Mengmeng Hu,Taoli Deng,Yutao Zhang,Peihua Ma
A novel Bi-based metal-organic framework impregnated phosphomolybdic acid (PMA@Bi-MOF) catalyst has been fabricated via a simple hydrothermal procedure, and successfully applied in the preparation of biodiesel using oleic acid (OA) as the raw material. The PMA@Bi-MOF composites were exhaustively characterized with the help of FTIR , XRD, TPD-NH 3 , SEM-EDX, N 2 -physisorption, TGA , and XPS analyses. Experimental findings showed that the PMA@Bi-BTC exhibited a higher activity than that of PMA@Bi-BDC and Bi-BTC, attributed to its textural property, the presence of more acid sites with higher strength, and synergistic catalytic effects between PMA and Bi-BTC. The optimum conditions for esterification of OA, with a conversion of up to 92.5%, were found to be a molar ratio of methanol to OA of 20:1 and 0.15g PMA@Bi-BTC catalyst at 160 °C in 3 h. Meanwhile, reused studies indicated that the OA conversion reached more than 80% after seven reaction cycles. Furthermore, the activation energy of esterification catalyzed by PMA@Bi-BTC was also calculated as 54.8 kJ/mol. It is expected that our study provides an efficient route to biofuel production involving polyoxometalates/MOF synergistic catalysts.
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Frontiers in Bioengineering and Biotechnology
·
2023
·
IF 5.7
Liang Zixing,Li Xiaofeng,Chen Xiaofang,Zhou Jiawei,Li Yanan,Peng Jianhui,Lin Zhousheng,Liu Gai,Zeng Xiancheng,Li Cheng,Hang Lifeng,Li Hailiang
Introduction: Photodynamic therapy (PDT) and photothermal therapy (PTT) are widely used in the treatment of tumors. However, their application in the treatment of clinical tumors is limited by the complexity and irreversible hypoxia environment generated by tumor tissues. To overcome this limitation, a nanoparticle composed of indocyanine green (ICG) and Fe-MOF-5 was developed.Methods: We prepared F-I@FM5 and measured its morphology, particle size, and stability. Its enzyme like ability and optical effect was verified. Then we used MTT, staining and flow cytometry to evaluated the anti-tumor effect on EMT-6 cells in vitro. Finally, the anti-tumor effect in vivo has been studied on EMT-6 tumor bearing mice.Results: For the composite nanoparticle, we confirmed that Fe-MOF-5 has the best nanozyme activity. In addition, it has excellent photothermal conversion efficiency and generates reactive oxygen species (ROS) under near-infrared light irradiation (808 nm). The composite nanoparticle showed good tumor inhibition effect in vitro and in vivo, which was superior to the free ICG or Fe-MOF-5 alone. Besides, there was no obvious cytotoxicity in major organs within the effective therapeutic concentration.Discussion: Fe-MOF-5 has the function of simulating catalase, which can promote the decomposition of excessive H2O2 in the tumor microenvironment and produce oxygen to improve the hypoxic environment. The improvement of tumor hypoxia can enhance the efficacy of PDT and PTT. This research not only provides an efficient and stable anti-tumor nano platform, but also has broad application prospects in the field of tumor therapy, and provides a new idea for the application of MOF as an important carrier material in the field of photodynamic therapy.
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CARBON
·
2023
·
IF 10.9
Tianwen Xie,Shuaizhen Li,Lin Ma,Jian Li,Shengyang Pang,Chenglong Hu,Rida Zhao,Sufang Tang
With widespread requirements of electromagnetic wave absorption in 5G era, the advanced wave-absorbing materials with corrosion resistance are urgently required. Herein we have synthesized a bimetallic NiZn-MOF-derived composite with broad electromagnetic wave absorption and strong excellent corrosion resistance using a facile hydrothermal method . Based on the composition modulation of the produced Ni/Ni 3 ZnC 0.7 particles, dense and continuous carbon shell can be formed and eventually encapsulate the particles. The resulting composite has an optimum reflection loss of −56.8 dB at 2.40 mm and an effective absorption bandwidth of 5.9 GHz at 2.34 mm. Besides, it remains stable after 6-month immersion in the corrosive mediums, suggesting its long-term corrosion resistance. This work provides a way to prepare MOF-derived wave absorbing materials with anti-corrosion function.
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CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2023
·Vol. 39
·期 6
·976-984
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IF 3.1
Hou Huipeng,Tang Shanshan,Wang Wei,Liu Miao,Liang Axin,Xie Bingteng,Yi Yue,Luo Aiqin
I n this work, an electrochemical chiral sensor of a nanowire-like chiral metal-organic framework/multiwalled carbon nanotube-chitosan/glassy carbon electrode( D -MOF/MWCNTs-CS/GCE) was proposed for the enantiorecognition of L / D -tryptophan( L / D -Trp). The asymmetrical spatial structure of D -MOF provides the feasibility for the enantiorecognition of Trp enantiomers. Moreover, differential pulse voltammetry(DPV) was carried out to be the detection method and the DPV peak potential difference(Δ E p ) between L -Trp and D -Trp was referred as the index of the enantiorecognition performance. Several parameters, such as mass ratios and drop-coated volume of MWCNTs-CS, drop-coated volume and concentration of D -MOF, pH and detection temperature of D -MOF/MWCNTs-CS/GCE were optimized for the largest Δ E p value. And the molecular dynamics(MD) simulation was used to elucidate the enantiorecognition mechanism. Furthermore, the proportions of D -Trp( D -Trp%) in Trp mixtures were detected in a good linear relationship with the DPV peak potentials( E p ), and the proposed electrochemical chiral sensor exhibited good reproducibility, stability and enantiorecognition ability. Additionally, the proposed electrochemical chiral sensor( D -MOF/MWCNTs-CS/GCE) has a good application prospect in the fields of biomedicine, clinical diagnosis, chemical production, pharmaceuticals safety and so on.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2022
·
IF 24.319
Junxian Qin,Yun Pei,Yue Zheng,Daiqi Ye,Yun Hu
Fe-MOF derivative (M-300) is successfully prepared by thermal treatment using MIL-100(Fe) as a precursor. The resulting M-300 catalyst displays excellent performance in the degradation of volatile organic compounds (VOCs) and the bacteriostasis to Escherichia coli under the visible light. In addition, the catalyst also exhibits the capacity of acetaldehyde degradation under actual sunlight. The high activity is attributed to the abundant exposure of the unsaturated Fe 2+ active site, which can significantly promote the transfer of photogenerated electron and the oxygen reduction process, thus improving the efficiency of the entire photocatalytic oxidation reaction. This work shows the application prospect of MOFs derivatives in the field of indoor photocatalytic purification, and also provides a new insight into the study of catalyst modification in photocatalytic degradation of pollutants.
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Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Qian Ye,Jin Li,Yinyin Huang,Hanbin Wu,Yilin Li,Bin Yan
Due to their unique properties, the efficient separation of racemic mixtures remains a great challenge. Recently, membrane separation has been demonstrated as a promising chiral separation technique with the advantages of continuous operation, high throughput, and cost effectiveness. In this work, a cyclodextrin-metal-organic framework (CD-MOF) was prepared and then composited with polyvinylidene fluoride (PVDF) polymer by the phase inversion via immersion precipitation method to form a CD-MOF/PVDF composite membrane for chiral amino acid separation for the first time. The composite membranes prepared under different conditions were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) thermogravimetric analysis (TGA)and differential scanning calorimetry (DSC). The effects of preparation conditions including CD-MOF load, polymer concentration, and casting solution temperature on the hydrophilicity, water flux , bovine serum albumin (BSA) rejection and chiral separation performance of the membrane were investigated. It is found that the composite membrane (V-5%−12) prepared with the CD-MOF load of 5%, polymer concentration of 12%, and casting solution of 70 ℃ shows the best performance with the water flux of 466.4 L/m 2 ∙h, BSA rejection rate of 24.3% and stable 100% separation efficiency for phenylalanine (Phe) enantiomers for 4 h. The interaction energies between the CD-MOF and D -Phe and L -Phe were calculated using the Gaussian 09 program package and the chiral separation mechanism of the composite membrane was proposed at the molecular level. Our work demonstrates great development potentials of the CD-MOF/PVDF composite membrane in the chiral separation of drugs.
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2019
·
IF 3.218
Han Chen,Xingxing Wu,Chunfeng Lao,Yingchun Li,Qunhui Yuan,Wei Gan
Metal organic framework (MOF), as an emerging type of porous materials, has attracted great interest in numerous fields. In this study, combining the advantages of MOF derived carbon and reduce graphite oxide (rGO), two types of MOF derived carbon modified reduced graphite oxide (ZIF-8C@rGO) were developed. When applied as electrode modifier in an electrochemical determination of hydroquinone (HQ) and catechol (CC), the obtained ZIF-8C@rGO exhibits remarkably improved selectivity and sensitivity than the ZIF-8C counterpart, attributable to the synergistic effect of the self-templated ZIF-8C anchors and the graphitized rGO substrate. Electrochemical results show that the ZIF-8C@rGO based sensor exhibits a wide linear range of 0.5 to 70 μM for both HQ and CC, with low detection limits of 0.073 μM for HQ and 0.076 μM for CC, respectively. A trial of monitoring HQ and CC in real water sample demonstrates the feasibility of the proposed ZIF-8C@rGO based sensor.
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