Journal of Environmental Chemical Engineering
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2023
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IF 7.7
Huihu Wang,Hao Tu,Feng Chen,Huang Xu,Ziguan Zhang,Guode Chen,Chenhuinan Wei,Xing Xiang,Zhixiong Xie
Through a facile oil bath method, a novel highly dispersed NH 2 -MIL-101(Fe)/carboxylated g-C 3 N 4 (NM-101(Fe)/CCN) heterostructure was prepared using the chemical bonding between carboxyl groups and -NH 2 groups. Compared with the octahedral morphology of pure NM-101(Fe), the chemical bonding interaction promoted the heterogeneous nucleation and growth of NM-101(Fe) to form nanometer-sized granular morphology, which was homogeneously dispersed on CCN surface. Cr(Ⅵ) and ciprofloxacin (CIP) were selected as the typical pollutant models in micro-polluted water sources. The results showed that 10 %NM-101(Fe)/CCN heterostructure could remove 97 % of Cr(Ⅵ) in 60 min and 88 % of ciprofloxacin (CIP) in 120 min. In the dual pollutant system of Cr(Ⅵ) and CIP, Cr(Ⅵ) reduction and CIP degradation can promote each other, and the degradation efficiency of CIP reached 96 % within 120 min. The apparent rate constant of 10 %NM-101(Fe) /CCN heterostructure for Cr(Ⅵ) reduction was 4.30 and 9.67 times of that of NM-101(Fe) and CCN, respectively, which may be ascribed to the interface electric field and good interface bonding of heterojunction . The charges separation efficiency was significantly improved, which effectively enhanced the photocatalytic activity.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Tao Tian,Jie Zhang,Sijie Ge,Lijiang Tian
Persulfate oxidation is a promising technology for air pollution control but still suffers from degrading refractory volatile organic compounds (VOCs) under mild conditions. Metal-doped metal-organic frameworks (MOFs) offer a novel strategy to enhance persulfate activation and VOCs degradation. Herein, a novel bimetallic MIL-101 (Fe, Cu) is prepared for more effective degradation of gaseous benzene via persulfate activation. Under optimal conditions (Fe/Cu ratio of 1:4, persulfate concentration of 7 mM/L, pH of 5, and reaction temperature of 70 °C), the MIL-101(Fe1, Cu4) activated persulfate system achieves a benzene degradation efficiency of 79.1 %, a value significantly higher than that of MIL-101(Fe) (20.1 %). The enhanced performance can be attributed to the synergistic effect of Fe²⁺/Fe³⁺ and Cu²⁺/Cu⁺ redox interactions facilitating the activation of persulfate and generation of radical species. Density functional theory (DFT) calculations indicate an increase in the adsorption energy of MIL-101(Fe) in the presence of Cu doping from −3.46 eV to −5.92 eV along with a rise in the Fermi energy level from 0.5 eV to 1.33 eV, enhancing the electron density and mobility. A reaction energy diagram is provided to illustrate the reaction pathways and transition states involved in the degradation of benzene. Overall, the incorporation of Cu in MOFs significantly enhances the efficiency of persulfate-based oxidation systems toward VOCs degradation.
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JOURNAL OF SOLID STATE CHEMISTRY
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2025
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IF 3.5
Tongxin Xiao,Kangyue Qiao,Guodong Hao,Songyao Du,Yue Wang,Chao Sui
This study employed a solvothermal method to prepare an NH 2 -MIL-101(Fe, Co) bimetallic organic framework composite catalyst aimed at enhancing the photocatalytic reduction performance of Cr(VI). The experimental results show that introducing Co into the single-metal NH 2 -MIL-101(Fe) does not alter the material's octahedral structure. However, the bimetallic synergistic effect shifts the light absorption range to the red end of the spectrum, reduces the bandgap, and significantly improves carrier separation efficiency. Under visible light irradiation, the NH 2 -MIL-101(Fe, 0.15Co) catalyst exhibited outstanding photocatalytic performance, achieving a reduction efficiency of 94.7% for Cr(VI) within 40 minutes and 100% within 50 minutes, with a reaction rate constant 4.7 times that of the single-metal NH 2 -MIL-101(Fe). Free radical capture experiments further revealed that ·O 2 - is the key active species in the Cr(VI) reduction process, while photo-generated holes in the valence band can oxidise OH - to ·OH, synergistically participating in the reaction. Additionally, cyclic stability experiments showed that the catalyst maintained 85.8% reduction efficiency after five cycles, demonstrating excellent stability and practical application potential.
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MICROPOROUS AND MESOPOROUS MATERIALS
·
2025
·
IF 4.7
Jian Luo,Yonghui Lin,Yanfeng Liu,Siliang Wang,Yiduo Chen,Xudong Tian,Weiting Yang,Zhongmin Su
Roxarsone (3-nitro-4-hydroxyphenylarsenic acid, ROX) is easily converted into highly toxic inorganic arsenic compounds, therefore, the development of highly efficient adsorbents for the removal of ROX from wastewater is necessary but remains challenging. In this study, NH 2 -MIL-101 (Fe) was synthesised and modified with TPA-CHO (4-(N, N-diphenylamine) benzaldehyde) to obtain TPA-MIL-101(Fe) with triphenylamine functionalised groups. The modified TPA-MIL-101(Fe) exhibits the very high adsorption capacity (728.2 mg g −1 ) and fast adsorption equilibrium (2 h). The TPA-MIL-101(Fe) showed excellent selectivity, and the adsorption efficiency hardly decreased in the presence of competing ions (Cl − , NO 3 − , SO 4 2− ). The TPA-MIL-101(Fe) showed good adsorption performance for ROX at pH 3–13, with the best performance at pH = 9. In addition, TPA-MIL-101(Fe) was able to remove trace amounts of ROX from actual water samples (<5 mg L −1 ) with an efficiency of 99.46 %, and the remaining ROX content meets the international drinking water standards of the World Health Organization (29 μg L −1 ). The mechanism studies have shown that the Fe-O-As coordination and the π-π stacking interaction between TPA-MIL-101(Fe) and ROX greatly enhance its adsorption performance. In conclusion, this work provides a promising material for effective removal of ROX from the environmental water.
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MICROBIAL PATHOGENESIS
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2025
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IF 3.5
Qiaowen Wang,Xiao Huang,Dingjun Wang,Biying Zhong,Mengyuan Xu,Li Liu,Tiantian Liu
Background Multidrug-resistant Staphylococcus aureus (S. aureus) and Escherichia coli (E. coli) are emerging in large numbers, while the rapid development of antimicrobial nanomaterials offers new opportunities to combat bacterial infections and antimicrobial resistance. Objectives We employed the nanomaterial MIL-101(Fe) as a carrier loaded with Patchouli alcohol (PA) to form the complex MIL-101(Fe)-PA. and to investigate the inhibitory activity of MIL-101(Fe)-PA against S. aureus and E. coli . Methods According to the literature,we prepared MIL-101(Fe)-PA by solvent method. Characterization of MIL-101(Fe)-PA was carried out using scanning electron microscopy(SEM), Fourier transform infrared(FT-IR) spectroscopy,X-ray diffractometer (XRD) and Brunauer-Emmett-Teller (BET) adsorption analysis. In the bacteriostatic experiments,its bacteriostatic effect was investigated by Minimal inhibitory concentration (MIC) experiments, cell proliferation,and growth curves of bacteria. Then its cytotoxicity was explored by cytotoxicity experiments. Results The characterization results indicated that we successfully prepared the complex MIL-101(Fe)-PA,which showed significant bacteriostatic effects against S. aureus and E. coli at 2 mg/mL. The inhibitory effect was stronger than that of MIL-101(Fe) as well as PA. Conclusion It shows that MIL-101(Fe)-PA has excellent inhibitory effect on S. aureus and E. coli.
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ANALYST
·
2019
·Vol. 144
·期 8
·2716-2724
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IF 4.019
Zunfu Hu,Yongheng Yin,Qingyun Liu,Xiuwen Zheng
The rapid and sensitive detection of H2O2 is of great importance for a series of industries. In this work, surface-modified FePt nanoparticles were loaded into metal–organic frameworks (MOFs, MIL-101(Fe)) in a facile in situ way and the resulting material (FePt@MOFs NCs) acted as a high efficient colorimetric detection agent. The as-prepared FePt@MOFs NCs possess a well-defined octahedron shape and high stability in water. Via the oxidation reaction of the chromogenic substrate 4,4′-bi-2,6-xylidine, the obtained FePt@MOFs NCs were proved to possess prominent peroxidase-mimic activity. Under the most favorable conditions, the linear range for H2O2 detection was 40 μM to 800 μM and the detection limit was 18.9 μM. Furthermore, FePt@MOFs NCs were successfully applied to the detection of H2O2 in real samples such as fruit juice. The developed colorimetric sensing platform is expected to have potential for the exact detection of H2O2 for the food, mining and bio-pharmaceutical industries, due to its high stability, sensitivity, rapidness and easy preparation.
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JOURNAL OF HAZARDOUS MATERIALS
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2018
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IF 6.434
Lei He,Yanan Dong,Yane Zheng,Qingming Jia,Shaoyun Shan,Yaqin Zhang
A novel magnetic MIL-101(Fe)/TiO 2 composite was synthesized for photo degradation of tetracycline (TC) under solar light. The composite was characterized by XRD, TGA, SEM, TEM, EDS, BET, FTIR, XPS, VSM, ESR, and PL. The resultant composite was environment friendly material, which exhibited high TC degradation efficiency and excellent reusability. In the meantime, it could be separated easily from TC solution by using magnet, which would save significant time and cost of preparation and degradation, having broad prospect in application. Using 1 g L −1 magnetic MIL-101(Fe)/TiO 2 at pH = 7, 92.76% degradation efficiency was achieved under solar light irradiation in 10 min for 20 mg L −1 TC. Further experiments indicated that TiO 2 introduced in the composite played an important role in the degradation process, which could be activated by the UV light in solar light to generate large amount of O 2 − and OH radicals. The degradation efficiency of TC in this paper was significantly higher than other research papers reported in last three years. This study put forward new magnetic Fe-based metal-organic frameworks (MOFs)/TiO 2 composite for degrading pharmaceutical wastewater.
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LANGMUIR
·
2025
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IF 3.9
Mingyang Xiong,Yao Zeng,Ruisi Qiu,Hongxing He,Yi Zhang,Zhifeng Nie,Bing Wang
Bisphenol A (BPA) is extensively utilized as an industrial chemical in the production of certain plastics and epoxy resins. They are frequently found in environmental water and have the potential to cause risks to both the environment and human health. To efficiently remove the endocrine disruptor BPA from aqueous solutions, sea urchin-like magnetic material Fe3O4@PDA@NH2-MIL-101 (Fe) was synthesized via hydrothermal methods. Fe3O4@PDA@NH2-MIL-101 (Fe) has excellent adsorption performance, with a theoretical maximum adsorption capacity of 300.47 mg/g for BPA. The adsorption kinetics of BPA by Fe3O4@PDA@NH2-MIL-101 (Fe) followed the pseudo-second-order kinetic model and Liu’s isotherm model. Magnetic separation experiments reveal a high recovery efficiency, maintaining 94.82% of its initial adsorption capacity after five cycles. The primary adsorption mechanisms of Fe3O4@PDA@NH2-MIL-101 (Fe) on BPA included pore filling, hydrogen bonding, π–π interaction, and Lewis acid–base interaction. Additionally, the material showed excellent removal performance of BPA, with a maximum adsorbed amount of 135.27 mg/g for total organic carbon (TOC) in the shale gas fracturing flowback fluid. These findings suggest that Fe3O4@PDA@NH2-MIL-101 (Fe) holds significant potential as an adsorbent for BPA removal from actual wastewater, offering promising prospects for practical applications.
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Journal of Environmental Chemical Engineering
·
2025
·Vol. 14
·期 1
·120944
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IF 7.2
Yong Xiang,Li Xu,Guoji Liu
Efficient recovery of Au(III) from electronic and industrial waste streams is of both economic and environmental importance. Herein, a pore-regulation strategy was developed to construct hierarchically porous NH 2 -MIL-101(Fe 1-x Cu x ). By employing 2-aminoterephthalic acid to coordinate simultaneously with Fe 3 + and Cu 2+ , the unstable Cu–O bonds were selectively removed through a mild acid-soaking treatment, thereby generating enlarged channels and hierarchical micro–mesoporous structures. The optimized framework achieved an Au(III) adsorption capacity of 944 mg g −1 , which was ∼30.7 % higher than that of unmodified NH 2 -MIL-101. Mechanistic studies demonstrated that the hierarchical pore architecture not only facilitated mass transfer but also enhanced accessibility of active sites, synergistically contributing to the superior adsorption performance. This work highlights that rational pore-channel engineering around adsorption sites can substantially boost the recovery efficiency of reducible precious metals, offering a novel design paradigm for advanced MOF-based adsorbents.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Yongxiang Jiang,Yang Liu,Jia Bao,Xin Wang,Xiaomin Hu
Emerging Contaminants (ECs) in water bodies pose significant environmental concerns. Adsorption technology, known for its low cost, high efficiency, and ease of use, is a promising solution for ECs removal. This study investigated the adsorption performance of MIL-101(Fe), an iron-based metal-organic framework (MOF), for ECs with different molecular sizes. Sodium p-perfluorous nonenoxybenzenesulfonate (OBS), diclofenac sodium (DCF), and tetracycline hydrochloride (TCH) were selected as representative ECs, covering PFAS substitutes, NSAIDs, and antibiotics. MIL-101(Fe) exhibited specific surface area, excellent mesoporous structure and abundant surface active sites, enabling efficient adsorption. Under optimized conditions (pH = 5.8, 6, and adsorbent dosages 9, 40, 20, and 20 mg), removal efficiencies for OBS, DCF, and TCH reached 95.9 %, 97.5 %, and 86.4 %, respectively. Cyclic tests showed stable performance after five adsorption-desorption cycles. Kinetic studies indicated that OBS followed a pseudo-first-order model, while DCF and TCH adhered to a pseudo-second-order model. The maximum adsorption capacities for OBS, DCF, and TCH were 945.1, 1595.9, and 439.5 mg·g −1 , respectively. Adsorption mechanisms revealed that smaller molecules like OBS and DCF easily entered the mesopores, while larger TCH molecules faced diffusion restrictions. The molecular interactions among OBS, DCF, and TCH involved electrostatic attraction toward -SO₃ − groups and pore filling in OBS, diffusion into the pore interior followed by hydrogen bonding with -NH₂ and π-π stacking in DCF, and surface-confined hydrogen bonding with -OH/-NH₂ and π-π interactions in TCH. This study provided a theoretical basis for efficient treatment of ECs with various molecule structures by Fe-MOFs adsorption materials.
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Chemical Engineering Journal Advances
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2026
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IF 6.9
Long Liu,Jie Zou,Zihao Zhou,Yuxuan Yang,Xueqiang Shao,Yangyang Bian,Mingwen Zhang,Jinbei Yang
In this study, functionalized ionic liquids were precisely anchored onto the pores and surfaces of the high-specific-surface-area MIL-101(Fe) metal-organic framework (MOF) carrier through covalent bonding, achieving the ordered arrangement of active sites and the modulation of the local microenvironment. Specifically, carboxyl-functionalized imidazolium ionic liquids bridge Fe³⁺ ions and terephthalic acid ligands to construct the supported acidic ionic liquid MIL-101(Fe)-[(CH₂COOH)₂IM][HSO₄] via solvothermal co-assembly. The obtained catalyst efficiently facilitates the esterification of various free fatty acids with methanol for biodiesel production. The catalyst was characterized by XRD, FT-IR, XPS, SEM, BET-BJH, and TGA. The catalyst demonstrated high acidity (6.31 mmol/g), excellent thermal stability, and efficient catalytic performance. Under the operating conditions optimized by response surface methodology (catalyst dosage of 8.64%, methanol-to-oleic acid molar ratio of 16.9:1, reaction temperature of 67.0 °C, and reaction time of 4.0 h), the oleic acid conversion over MIL-101(Fe)-[(CH₂COOH)₂IM][HSO₄] reached 97.66%, and it still maintained favorable catalytic performance after 7 cycles. In addition, MIL-101(Fe)-[(CH₂COOH)₂IM][HSO₄] also exhibited broad substrate applicability, and could serve as a promising catalyst for biodiesel preparation.
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Materials Today Communications
·
2025
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IF 4.5
Biying Zhong,Dingjun Wang,Xiaotong Lai,Xiao Huang,Qiaowen Wang,Xinghan Ren,Xinyue Shen,Li Liu,Tiantian Liu
In recent years, the burden of disease caused by Staphylococcus aureus and Escherichia coli infections has been significant. Currently, the development of antibiotics faces severe challenges, as the long-term misuse of traditional antibiotics has accelerated the evolution of resistance, while the pace of novel drug development lags far behind the rate of bacterial evolution. Therefore, the development of new antibacterial agents is urgently needed. This study presents a metal-organic framework composite material loaded with zinc oxide and kaempferol (MIL-101(Fe)@Zn-KF). The prepared material was characterized using Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), ultraviolet-visible spectrophotometry (UV-Vis), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS) and zeta potential analysis. Peroxidase-like activity, biosafety and antioxidant property of the composite were evaluated. The in vitro antibacterial effect of the composite against Staphylococcus aureus and Escherichia coli was investigated using the plate coating method and bacterial growth curves experiment. The synthesized material exhibited multifunctionality, such as enzyme-like activity, antibacterial property and antioxidant capacity. Compared to MIL-101(Fe)@Zn, MIL-101(Fe) and kaempferol alone, the MIL-101(Fe)@Zn-KF composite demonstrated superior antibacterial effect, with inhibition rate of 98.76% and 98.34% against Staphylococcus aureus and Escherichia coli , respectively. MIL-101(Fe)@Zn-KF was able to catalyze hydrogen peroxide to generate reactive oxygen species, which synergized with the composite itself to exert bactericidal effect. Systematic evaluation of the cytotoxicity and hemolytic effect of MIL-101(Fe)@Zn-KF revealed the excellent biosafety and clinical potential of the composite. In summary, the composite material synthesized in this study combined peroxidase-like activity, antibacterial performance, antioxidant capacity and excellent biocompatibility, providing new insights for the development of efficient and safe antibacterial materials.
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