Journal of Cleaner Production
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2024
·
IF 9.7
Yang Lv,Shaopeng Wu,Haiqin Xu,Na Li,Quantao Liu,Huan Wang,Yingxue Zou,Qi Jiang,Serji Amirkhanian
The adsorption kinetics and molecular dynamics were modeled based on the structure-assembled technique of MOFs , conjugate bonding and targeted adsorption of characteristic pollutants. The mechanism of interaction between UiO-66 and rubber-modified asphalt (RMA) was simulated. The adsorption characteristics between UiO-66 and five class I carcinogens, high concentration VOCs components were simulated by Sorption module. The conjugate bonding and targeting adsorption mechanism between UiO-66 on VOCs was elucidated by combining the GC-MS analysis data. The results were showed that the interaction between UiO-66 and rubberized asphalt was influenced by the number of molecules, contact area, spatial site resistance, and active groups. The content of UiO-66 should be controlled below 3.31 %. The small size of vinyl chloride molecules made it easier to enter the pore structure of UiO-66 with a maximum inhibition rate of 91.75 %. The 1,2-dichloropropane has a large molecular size, spatial site resistance, non-conjugation effect, and the smallest adsorption amount of 72.2 %. The total concentration of VOCs was decreased from 726.38 mg/cm 3 to 166.12 mg/cm 3 , a reduction of 77.13 %. The adsorption of UiO-66 on VOCs molecules was affected by molecular size, carbon chain length, conjugation effect, polarity and other factors. VOCs and UiO-66 form a p-d, d-d π conjugation effect based on the conjugated structure, targeting adsorption within the benzene ring of the organic framework.
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RSC Advances
·
2024
·Vol. 14
·期 38
·28148-28159
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IF 3.9
Lidi Gao,Xinran Qu,Shuang Meng,Mo Chen,Yuxin He,Fuquan Zhao,Hongtao Chu,Shili Qin,Fenglong Jin
The excellent stability of covalent organic frameworks (COFs) and the diversity of metal organic frameworks (MOFs) make MOF/COF hybrid materials promising candidates for chromatographic stationary phases. In this paper, a TpBD/UiO-66-NH2 hybrid material was synthesized through a Schiff-base reaction between TpBD COFs and UiO-66-NH2 MOFs; characterized using Fourier-transform infrared spectroscopy, X-ray diffraction, and X-ray photoelectron spectroscopy; and bonded to a capillary to prepare a TpBD/UiO-66-NH2-bonded open tubular capillary electrochromatography (OT-CEC) column. Results suggested that the hybrid material had the crystal morphology of a single COF and MOF, a micro–mesoporous structure, and good thermal stability. The inner surface of the OT-CEC column was tightly and uniformly distributed with the stationary phase (∼1.5 μm). The baseline separation of 13 amino acids and three families (4 acidic antibiotics, 4 preservatives and 6 sulfonamides) of emerging pollutant mixtures was achieved due to the synergistic effect of TpBD and UiO-66-NH2 in the stationary phase. The OT-CEC column showed good reproducibility and stability with relative standard deviations of migration time and resolutions in the range of 1.17–3.93% and 1.79–4.31%, respectively.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
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IF 4.9
Qin Cheng,Jinping Gan,Kai Cai,Ming Xia,Yi Wu,Shanshan He,Pan Cheng,Qihao Guo,Ke Liu,Dong Wang
High-quality polyamide (PA) nanofiltration (NF) membrane with excellent selectivity and permeability is of great research significant because of their high practical application value, especially for the precise separation of divalent and monovalent ions, such as Mg 2+ and Li + . Herein, UiO-66-NH 2 nanoparticles (NPs) decorated ethylene vinyl alcohol copolymer (EVOH) nanofiber substrate (M-NFM) was utilized to construct high-quality Janus NF membrane through interfacial polymerization (IP) reaction using polyethyleneimine (PEI) and piperazine (PIP) as aqueous phase monomers and trimesoyl chloride (TMC) as organic phase monomers. The incorporation of UiO-66-NH 2 NPs significantly influenced the hydrophilicity, surface morphology, and pore structure of the substrate, thereby enhancing the properties of the resulting NF. Optimally prepared membranes demonstrated improved separation performance, permeability, stability, and antifouling characteristics compared to the unmodified substrate. Notably, at a Mg 2+ /Li + ratio of 30, the resultant NF membrane achieved a separation factor (S Mg 2+ /Li + ) of 28.4 and a salt permeation flux of 156.8 L·m -2 ·h -1 ·MPa -1 . Additionally, the membrane exhibited over 98% rejection rates for FeCl 3 , CuSO 4 , CaCl 2 , MgSO 4 , MgCl 2 and Na 2 SO 4 with fluxes exceeding 150 L·m -2 ·h -1 ·MPa -1 , highlighting its effectiveness in rejecting multivalent ions. This research presents a simpler and more reliable approach to the fabrication of high-quality Janus PA NF membrane, offering promising potential for industrial-scale applications.
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WATER SCIENCE AND TECHNOLOGY
·
2024
·Vol. 89
·期 4
·873-886
·
IF 2.5
Tao Haiyan,Cao Xiaochang,Song Rujie,Zhou Zebin,Cheng Fang
A membrane-aerated biofilm reactor (MABR) combines membrane technology with biofilm processes and has unique advantages in the treatment of organic wastewater and volatile wastewater. The common membranes for MABR systems usually have relatively uneven pore structures and low bubble point pressure, resulting in unsatisfactory O 2 utilization and wastewater treatment efficiency. In this work, polydimethylsiloxane (PDMS) and UiO-66 (a Zr-based metal organic framework) were coated on the surface of a commercial polypropylene (PP) hollow fiber membrane to prepare oxygen-rich MABR membranes and modules, which showed an attractive O 2 utilization rate and wastewater treatment efficiency. The bubble points of the PDMS and PDMS-UiO-66 membranes were significantly higher than those of the PP membranes, and the PDMS-UiO-66 membranes had better oxygen enrichment capacity and biological affinity. The optimal PDMS-UiO-66 membrane modules had an O 2 permeance of 31.65 GPU (1 GPU = 3.35 × 10 −10 mol m −2 s −1 Pa −1 ), with O 2 /N 2 selectivity of 2.21. The membrane hanging effect and processing capacity for domestic sewage were greatly improved. This study may provide insights and guidelines to fabricate porous mixed matrix membranes and modules in the industry for MABR. The developed products are expected to be applied in the actual separation process. PDMS and PDMS-UiO-66 were coated on the PP support to prepare O 2 -rich MABR membranes and modules. With UiO-66 loading, the module has a higher O 2 /N 2 separation performance, a rougher and more hydrophilic membrane surface. The PDMS-UiO-66 membrane module exhibits a good biofilm hanging effect and high NH 4 + -N removal performance.
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ACS Applied Nano Materials
·
2025
·
IF 5.5
Zixu Wang,Linna Han,Qing Xia,Wanfang Feng,Songtao Li,Liyan Liu
Enrichment and quantification of sugar phosphates (SPx) in biological samples are of great significance in biological medicine. In this work, a magnetic nanoscale metal–organic framework composite, Fe3O4@UiO-66-NO2, was synthesized and utilized as a high-capacity adsorbent for the enrichment of SPx in biological samples. Fe3O4@UiO-66-NO2 exhibited a high specific surface area (310.02 m2/g), a suitable pore size (3.47 nm), and strong magnetism (14.99 emu/g), enabling convenient separation and recovery. Experimental results demonstrated that Fe3O4@UiO-66-NO2 exhibited excellent adsorption performance for five types of SPx, achieving complete adsorption within 6 min at a dosage of 200 μg, and the adsorption process exhibited pH tolerance. The adsorption isotherm result indicated that the maximum adsorption capacities for different SPx ranged from 234.06 mg/g to 403.24 mg/g. Adsorption mechanisms using X-ray photoelectron spectroscopy, FT-IR, and density functional theory revealed multiple interactions, such as coordination and hydrogen bonding, and contributed to the adsorption process. A magnetic nanoscale-dispersive solid-phase extraction protocol was developed based on a Fe3O4@UiO-66-NO2 for rapidly enriching SPx from biological samples. The protocol allowed for SPx detection over a wide linear concentration range, low limits of detection (0.001–0.02 ng/mL), high precision (<7.88%), and good accuracy (82.56%–119.66%). This protocol was successfully applied to real blood samples, prefiguring the great potential of magnetic MOFs for the enrichment and detection of SPx in biological samples.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2024
·Vol. 35
·期 4
·1-16
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IF 2.8
Wu Sheng,Wang Tingting,Li Yingwei
A novel 3D octahedral BiOBr/UiO-66 heterostructure photocatalyst was synthesized through the in-situ growth of BiOBr nanosheets on octahedral UiO-66 at ambient temperature. This heterojunction of type II exhibits a substantial specific surface area, promoting intimate interfacial contact which favors carrier transmission and enhances the contact area of the semiconductor surface reaction. The morphology and structure of the catalyst were characterized via SEM and TEM. Transient photocurrent and electrochemical impedance spectroscopy confirm the advantageous nature of the heterojunction for carrier separation. Further investigation delves into the photocatalytic degradation of RhB. After 70 min of light irradiation, the removal rate of RhB reached a remarkable 94.9% using the 60% BiOBr/UiO-66 composition. Furthermore, the apparent kinetic constant of the 60% BiOBr/UiO-66 was measured to be 0.03522 min −1 , surpassing pure BiOBr (0.01238 min −1 ) by a factor of 2.9 and UiO-66 (0.00035 min-1) by a factor of 100. Experiments involving free radical capture provide evidence that superoxide radicals (·O 2− ), electrons(e − ) and holes (h + ) are the principal active species during the photodegradation process. Accordingly, a proposed photocatalytic mechanism for the BiOBr/UiO-66 heterojunction emerges.
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INORGANIC CHEMISTRY
·
2026
·
IF 4.6
Junhui He,Mingming Zhang,Xiaochu Zheng,Jianfeng Li,Linjuan Yang,Cong Luo,Xudong Cui,Zhuoyu Ji,Daopeng Sheng,Xiaofang Feng,Tao Chen,Wenkun Zhu
The synergistic coupling of nonthermal plasma (NTP) with catalysts offers a promising route for converting CO2/H2O into high-value-added chemicals, but its efficiency is hindered by low-activity catalysts and electron quenching by gaseous H2O. Herein, we propose a “surface electron-enriched microenvironment” strategy to construct a UiO-66(SH)2 catalyst to boost NPT CO2 conversion. Under dielectric barrier discharge (DBD) plasma conditions, the UiO-66(SH)2 catalytic system achieves a CO2 conversion rate of 42.19%, which is 1.88 and 38.87 times higher than that of the unmodified UiO-66 system and plasma-only system, respectively. CO was identified as the dominant carbon-containing product with a selectivity of 82.39%, along with CH4 and trace C2–C3 hydrocarbons. Theoretical calculations and experimental results confirm that the thiol groups in UiO-66(SH)2 create an electron-enriched microenvironment, which significantly enhances the adsorption and activation of CO2 while effectively suppressing the electron quenching effect of gaseous H2O on a plasma-induced CO2 dissociation process. Furthermore, thiol functional groups create an electron-rich microenvironment, effectively reducing the free-energy barrier for the formation of the key intermediate *COOH and thereby accelerating CO2 conversion kinetics. This research provides a rational strategy for achieving efficient and highly selective plasma catalytic CO2 conversion through the metal–organic frameworks (MOFs) functionalization.
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LUMINESCENCE
·
2026
·Vol. 41
·期 7
·e70567
·
IF 2.8
Fenqiang Luo,Liyan Zheng
Novel multifunctional metal–organic frameworks prepared by encapsulating luminol, hemin, and glucose oxidase within UiO-66 have been employed for the chemiluminescent determination of glucose via a one-step method. Benefitting from the encapsulating cascade catalyst with luminescent reagent in UiO-66, the as-prepared material can be utilized to fabricate practical glucose sensors with a wide response range, a low detection limit, and a short detection time. This promising sensing material is anticipated to have widespread applications in biotechnology and demonstrates significant potential for the green, selective, and sensitive detection of target analytes.
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Reaction Kinetics Mechanisms and Catalysis
·
2026
·
IF 2.1
Gao Shuang,Yu Yue,Li Yunheng,Han Lu,Song Yakai,Chen Xiaolu
A set of phosphomolybdic acid catalysts was synthesized by employing ligand-functionalized UiO-66 as the support. The structural properties of these catalysts were characterized via XRD, FT-IR, BET, TEM, and XPS techniques. To explore the influence of catalyst structure on its catalytic performance, the desulfurization of dibenzothiophene (DBT) from simulated fuel was utilized as a model reaction. Under optimized reaction parameters, the Co-POM-UiO-66-NO 2 -F catalyst exhibited the highest DBT conversion efficiency, achieving 99.3%. After five consecutive desulfurization cycles, the catalyst retained a desulfurization activity of 91.8%. This excellent stability was attributed to the incorporation of the –F group, which enhanced the catalyst’s lipophilicity and hydrophobicity. Additionally, the incorporation of –F groups increased the content of the Mo active species (Mo 5+ ), regulated the electronic structure of the catalyst, and optimized the microenvironment surrounding the active centers, which collectively contributed to the enhanced catalytic performance. Graphic abstract
The alternative text for this image may have been generated using AI.
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ChemCatChem
·
2026
·Vol. 18
·期 7
·e70718
·
IF 4.1
Somboon Chaemchuen,Xingxing Chen,Deshuang Lu,Panchan Sricharoon,Suwin Apichartpattanasiri,Nikom Klomkliang,Francis Verpoort
Highly dispersed palladium nanoparticles (Pd NPs) embedded within a hierarchical UiO-66 structure, referred to as Pd@U-12, have been successfully synthesized via a green, straightforward of solid-solid thermal (SST) method. This innovative SST technique enables uniform dispersion of Pd NPs, allowing their encapsulation within the hierarchical framework of UiO-66. The unsaturated sites in the host UiO-66 facilitate the coordination of Pd, which are subsequently reduced to nanoparticles during the SST process, forming Pd@U-12. The Pd NPs are highly dispersed on the hierarchical support (U-12) and serve effectively as catalytic sites for hydrogenation reactions. The optimally synthesized 20%Pd@U-12 demonstrated exceptional performance as a heterogeneous catalyst for the hydrogenation of cyclohexene, achieving 99% conversion with stable activity over five consecutive cycles. Notably, the SST method for encapsulating Pd NPs (Pd@U-12) offers several advantages, including rapid incorporation of metal nanoparticles within a short time, a green, solvent-free synthesis process, high dispersion and stability of the metal content within the host material. These features could significantly enhance the effectiveness of Pd@U-12 as a robust heterogeneous catalyst in various catalysis applications. Graphical
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LANGMUIR
·
2026
·
IF 4.4
Yunyun Li,Xiaohui Zeng,Ge Wang,Dingyi Zhang
The widespread misuse of nonsteroidal anti-inflammatory drugs (NSAIDs) has become a growing concern due to their severe threats to aquatic ecosystems and human health. Current adsorption technologies face limitations including low capacity, poor efficiency for trace-level contaminants, and unclear removal mechanisms. These limitations stem from poorly optimized pore architectures and surface chemistries in existing materials, necessitating the development of multifunctional adsorbents with tailored active sites. Herein, a series of MnO2/UiO-66-x composites were rationally designed via a solvothermal approach and comprehensively characterized using powder X-ray diffraction (PXRD), Fourier transform infrared (FTIR) spectroscopy, N2 physisorption, scanning electron microscopy (SEM), and zeta potential analysis. Systematic optimization demonstrated that MnO2/UiO-66-1 (5 mg) achieved exceptional adsorption capacity (qmax = 659.49 mg·g–1) for diclofenac sodium (DCF, 20 mg·L–1, 30 mL), with >90% removal within 10 min (k2 = 0.0081 g·mg–1·min–1). Mechanistic studies revealed that this performance was attributed to hierarchical porosity (micro-/mesopores), which enables size-selective uptake, synergistic binding, and pH-dependent electrostatic enhancement. Structure–activity relationships indicated that NSAIDs adsorption efficiency (naproxen ≈ ibuprofen ≈ ketoprofen > indomethacin > paracetamol) was governed by molecular structure, size, and pKa values. Thermodynamic and kinetic studies confirmed a spontaneous (ΔG0 < 0), endothermic (ΔH0 > 0), and entropy-driven (ΔS0 > 0) process dominated by chemisorption through synergistic interactions (including coordination bonding, hydrogen bonding, Lewis acid–base effects, electrostatic attraction, and π–π stacking). This study establishes a new paradigm for metal–organic-framework-based adsorbent design through precise control of metal–organic interfaces and defect engineering. With 87% capacity retention after 5 regeneration cycles, MnO2/UiO-66-x shows strong potential for practical water remediation applications.
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CHEMICAL PAPERS
·
2026
·
IF 2.7
Zhong Xiangyan,He Xinye,Long Ruiqing,Qi Linfeng,Zhao Qiang
Efficient utilization of long-wavelength visible light remains a key challenge in developing metal-organic-framework-based photocatalysts for solar-driven pollutant removal. To address this issue, carbon quantum dot (CQD)-modified UiO-66-NH 2 hybrid materials with different nominal CQD loadings were constructed through induced loading and secondary thermal fixation to combine spectral conversion with interfacial photophysical regulation. Structural and textural characterizations showed that CQD incorporation preserved the crystalline and porous framework of UiO-66-NH 2 while modifying its surface composition, pore characteristics, and optical response. The CQDs displayed visible-to-ultraviolet anti-Stokes emission centered at approximately 340 nm under 600 nm excitation. CQD incorporation also enhanced visible-light absorption and induced photoluminescence quenching consistent with interfacial photophysical coupling. Transient-current measurements showed reproducible light-switching responses, while EIS revealed a lower impedance response for CU-3 under illumination; together, these results are consistent with facilitated interfacial charge migration. Under visible-light irradiation in the presence of FeCl 3 as an electron scavenger, CU-3, containing 3 wt% CQDs, achieved a background-corrected net methyl orange removal of 67% within 90 min. Its apparent rate constant was 1.203 × 10 − 2 min − 1 , approximately 6.6 times that of pristine UiO-66-NH 2 . Tert-butanol inhibition and DMPO spin-trapping ESR measurements jointly supported the involvement of hydroxyl radicals, with CU-3 exhibiting a stronger light-induced DMPO–·OH signal than pristine UiO-66-NH 2 . The effect of EDTA-2Na could not be assigned exclusively to photogenerated holes because of its complexation with Fe 3+ . These findings demonstrate the importance of optimizing CQD loading and suggest that spectral conversion and interfacial photophysical coupling contribute to the enhanced apparent visible-light activity.
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