JOURNAL OF CHROMATOGRAPHY A
·
2015
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IF 4.169
Wenmin Zhang,Zhiming Yan,Jia Gao,Ping Tong,Wei Liu,Lan Zhang
Fe 3 O 4 @SiO 2 @UiO-66 core–shell magnetic microspheres were synthesized and characterized by transmission electron microscopy, scanning electron microscopy, X-ray diffraction, Fourier transform infrared spectrometry, vibrating sample magnetometry, nitrogen adsorption porosimetry and zeta potential analyzer. The synthesized Fe 3 O 4 @SiO 2 @UiO-66 microspheres were first used for magnetic solid-phase extraction (MSPE) of domoic acid (DA) in shellfish samples. Combined with high performance liquid chromatography–tandem mass spectrometry (HPLC–MS/MS), a fast, simple and sensitive method for the determination of DA was established successfully. Under the optimized conditions, the developed method showed short analysis time, good linearity ( r 2 = 0.9990), low limit of detection (1.45 pg mL −1 ; S/N = 3:1), low limit of quantification (4.82 pg mL −1 ; S/N = 10:1), and good extraction repeatability (RSD ≤ 5.0%; n = 5). Real shellfish samples were processed using the developed method, and trace level of DA was detected. The results demonstrate that Fe 3 O 4 @SiO 2 @UiO-66 core–shell magnetic microspheres are the promising sorbents for rapid and efficient extraction of polar analytes from complex biological samples.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Dong Wang,Tinglue Zhang,Mohamed Gamal El-Din,Xuefen Wang
In this work, the 2-fluoroterephthalic acid with asymmetric structure and high electronegative F species was introduced in the assembly of Ce-UiO-66 catalysts to increase the defect density and enlarge pore structure for enhancement in removal efficiency of sulfamethoxazole. Owing to the strong coordination ability from high electronegative F species of 2-fluoroterephthalic acid with Ce-oxo nodes, the designed CUF exhibited improved interfacial properties (accelerated electron transfer rate, available active sites and enhanced interaction with PMS), which was favorable for the exploration and accessibility of active sites with sulfamethoxazole and PMS to decrease the adsorption barrier and accelerate PMS activation. As a result, the CUF catalysts exhibited higher adsorption capacity (173.4 mg/g) than that of CUH (117.8 mg/g), the enhanced degradation efficiency of sulfamethoxazole with a rate constant higher than 2.3 times CUH, good elimination (>95 %) of methylene blue, tetracycline and ibuprofen. In addition, the CUF/PMS system possessed satisfactory stability in wide solution pH, recycling and real water and good potential application in continuous wastewater treatment based on the designed dynamic catalytic reactor. This work provided deep insight into the design of catalysts with high adsorption performance and degradation efficiency based on the structure–activity relationship.
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CHEMICAL ENGINEERING JOURNAL
·
2025
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IF 13.2
Jiajun Yu,Xiao Wang,Shijie Yang,Xiaofeng Xie,Jing Sun
Ligand functionalization could effectively modulate the local electron distribution of MOFs, thus improving their performance in both the capturing and photocatalytic oxidization of various VOCs. In this work, a series of Fc-CHO/NU-X (X = 1, 2, 3, 4) were obtained through the ligand functionalization of reo -NH 2 -UiO-66 (denoted as NU) with ferrocenecarboxaldehyde (Fc-CHO) as the modifier. By altering the local charge distribution and inducing Fe-OH and cyclopentadienyl rings as new adsorption sites, Fc-CHO altered the adsorption behavior of both aromatic and oxygenated VOCs and consequently their degradation pathways. The introduction of electron-donating Fc-CHO enhanced the ligand to metal charge transfer (LMCT), accelerated the electron-hole separation and therefore promoted the effective formation of oxidative radicals, facilitating the effective oxidation of acetaldehyde. Direct charge transfer through p-p interaction enabled the ring-opening and deep oxidation of toluene. The degradation efficiencies of toluene and acetaldehyde increased from 25 % and 28 % (NU) to 80 % (Fc-CHO/NU-3) and 65 % (Fc-CHO/NU-2), respectively. Positive effects of Fc-CHO functionalization were also observed during the removal of acetaldehyde-toluene mixtures and the synergistic effect between acetaldehyde and toluene was revealed. This work provides new ideas and novel materials for the purification of in-door air pollutants.
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JOURNAL OF SEPARATION SCIENCE
·
2025
·Vol. 48
·期 7
·e70217
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IF 2.8
Piao Liu,Changhong Li,Minqi Ou,Chang Yin,Xinyue Kang,Jun Chen,Ran Liu,Jialang Zhuang
A dispersive solid-phase extraction process was established using UiO-66-NH 2 as an adsorbent, in combination with ultra-high-performance liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS) technology, and the performance of this combination for the metabolomic analysis of biological specimens was assessed. Differential metabolites in plasma samples from oral squamous cell carcinoma and hepatocellular carcinoma patients and healthy volunteers were screened, and metabolic pathway enrichment analysis was performed via pseudo-targeted metabolomics. Based on the significantly enriched metabolic pathways and related literature, 20 amino acids were selected and targeted for quantitative analysis. The key parameters for extraction recovery, including the type of liquid in the adsorption system, pH of the eluent, amount of UiO-66-NH 2 , and time of extraction and elution, were optimized based on the selected amino acids. The optimized method demonstrated a remarkable performance: correlation coefficients > 0.99, limits of detection ranging from 0.002 to 0.080 µg/mL (signal-to-noise ratio = 10), and recoveries of 63.9%–110.8% in plasma samples. Thus, via targeted metabolomics analysis, 10 amino acids (including lysine and 3-iodo-L-tyrosine) and 10 amino acids (including arginine and histidine) were determined as potential biomarkers for oral squamous cell carcinoma and hepatocellular carcinoma, respectively. Based on the above potential amino acid markers, discriminant equations for oral squamous cell carcinoma and hepatocellular carcinoma were established, respectively. Two biomarker combinations were successfully screened: lysine and 3-iodo-L-tyrosine (AUC = 0.998, sensitivity = 0.967, specificity = 1.0) for oral squamous cell carcinoma, and histidine and arginine (AUC = 0.944, sensitivity = 0.833, specificity = 0.933) for hepatocellular carcinoma. Our findings will provide new directions for cancer diagnosis.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
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IF 9
Yaofei Zhang,Jiani Chen,Tegexi Buren,Zhuo Li,Xiaojin Zhang,Shuting Ma,Jiafeng Wei,Fukun Bi,Xiaodong Zhang
Electron beam (EB) irradiation has emerged as an effective post-synthetic strategy to modify the structural properties of metal-organic frameworks (MOFs), offering enhanced defect engineering and improved active site dispersion. In this study, UiO-66-100, pretreated under the optimal EB irradiation dose of 100 kGy with abundant structural defects, was selected as the support to synthesize supported noble metal catalysts M-UiO-66-100 (M = Pt, Pd, Ru, Ag, Au). The catalytic performance of M-UiO-66-100 was evaluated by toluene and 2-propanol degradation. Among them, Pt-UiO-66-100 exhibited superior performance for toluene oxidation (T 90 = 187 °C), while Pd-UiO-66-100 showed excellent activity for 2-propanol degradation (T 90 = 229 °C). Both catalysts exhibited distinct physicochemical properties and adsorption behaviors in single-component Volatile organic compound (VOC) systems. Interestingly, further studies revealed that both Pt- and Pd-based catalysts displayed significantly enhanced catalytic activity for toluene and 2-propanol mixture oxidation, highlighting a mutual promotion effect. VOC- temperature-programmed desorption/oxidation (TPD/TPO) and thermal desorption-gas chromatography–mass spectrometry (TD-GC–MS) results elucidated the mutual promotion effect that compared with single VOC systems, Pd-UiO-66-100 and Pt-UiO-66-100 produce fewer intermediates during mixed VOC degradation, which reduced the accumulation of intermediates on the catalysts surface, released the surface active sites, and accelerated their mineralization. This work provides a rational design approach for EB-modified MOF-supported catalysts and deepens the insights into the synergistic oxidation mechanism in mixed-VOC systems.
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JOURNAL OF MEMBRANE SCIENCE
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2020
·
IF 7.183
Rong Rong,Yanwei Sun,Taotao Ji,Yi Liu
Zirconium-based MOF (Zr-MOF) membranes have attracted widespread attention due to their highly tailorable pore aperture and adsorption behavior achieved by functional group decoration and ligand/cluster-missing defect regulation as well as extraordinary chemical/thermal stability. Nevertheless, it has remained a great challenge to further improve the separation performance of Zr-MOF membranes due to very limited available zirconium sources and heating modes. In this study, we prepared polycrystalline UiO-66 membranes exhibiting unprecedented CO 2 /N 2 selectivity (31.3). The use of layered ZrS 2 , a representative of transition-metal dichalcogenides (TMDCs), as zirconium source during tertiary solvothermal growth was found to be indispensable for improving the separation performance of UiO-66 membranes. As far as we know, the CO 2 /N 2 selectivity reported in this study was the highest among all pristine polycrystalline MOF membranes measured under ambient conditions. More importantly, our study highlighted the importance of concurrent metal source and fabrication process innovation in performance enhancement of polycrystalline MOF membranes.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
·
IF 9.7
Jianan Wang,Dan Wen,Xiujuan Li,Yuling Xie,Bo Huang,Dongling Xie,Dunmin Lin,Chenggang Xu,Wenhan Guo,Fengyu Xie
Modifying metal–organic frameworks (MOFs)-based electrocatalysts remains crucial for enhancing oxygen evolution reaction (OER) performance. Although oxygen vacancies (V O ) are recognized as important for OER, their concentration control and relationship with catalytic activity remain unclear. In this study, we employ the redox potential difference between Co 2+/3+ (0.55 eV) and Ce 3+/4+ (1.44 eV) to induce corrosion on iron foam (IF), driving the redox reaction Ce 4+ + Co 2+ → Ce 3+ + Co 3+ to generate V O . The V O content can be qualitatively controlled by adjusting corrosion time, as verified by electron paramagnetic resonance (EPR). The CeFeCo-UiO-66/LDH catalyst delivers exceptional catalytic activity (overpotential η = 273 ± 3 mV @ 100 mA cm −2 ). Combined X-ray photoelectron spectroscopy (XPS), EPR, in-situ Raman, and Density functional theory (DFT) analyses reveal that the redox interaction between Ce and Co generates V O . These V O species facilitate the formation of active CoOOH during the OER. This work offers insights for designing V O engineering strategies in electrocatalytic systems.
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COMPOSITES COMMUNICATIONS
·
2024
·
IF 6.5
Yuanya Zhang,Yu He,Wen Ma,Yanlin Zhu,Yuxiang Liu,Junya Yuan,Xuehu Men
Despite epoxy composites being used in a wide range of applications, it remains a great challenge to solve the defect of high brittleness and poor wear resistance for real engineering applications. Nanomaterials enhance fracture toughness and provide superior antifriction and wear resistance for epoxy matrix materials. In this work, a late-model ANFs/MXene/UiO-66-NH 2 hybrid aerogel (AMU) with 3D layered and “mortar-brick” multi-hole structure was devised via solution impregnation and hydrothermal in situ growth processes. MXene and UiO-66-NH 2 were uniformly anchored to the surface of the ANFs aerogel backbone due to hydrogen bonding forces and electrostatic adsorption. The acquired AMU-EP composites exhibited excellent thermal conductivity owing to an efficient three-dimensional network of thermal conductive pathways inside the epoxy matrix. Moreover, the efficient synergistic effect of AMU components formed a high-quality transfer film on the surface of steel balls during the friction process, which was important for enhancing the tribological properties of AMU-EP.
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MICROCHIMICA ACTA
·
2025
·Vol. 192
·期 5
·1-12
·
IF 5.3
Li Weixia,Lei Jiacheng,He Tiancheng,Gan Yaping,Zhu Yan
A novel Zr-based metal–organic framework (MOF) functionalized with graphene oxide-coated allylmethacrylate-divinylbenzene microspheres (AMA/DVB@GO), termed AMA/DVB@GO@UiO-66-NH 2 was designed. The composite exhibits great adsorption capacity and selectivity for bisphenols (BPs), driven by synergistic interactions, including hydrophobic, π-π, and hydrogen bonding. We optimized conditions to establish an efficient dispersive micro-solid phase extraction procedure coupled with high-performance liquid chromatography (d-μSPE-HPLC) for extracting BPs from milk samples, using the AMA/DVB@GO@UiO-66-NH 2 composite. The method achieved recoveries ranging from 84.0 to 106.6%, with relative standard deviations below 6.9% and detection limits between 0.17 and 0.67 μg/L. This study introduced a novel, hydrophilic, and stable AMA/DVB@GO@UiO-66-NH 2 composite, offering a promising material for the selective enrichment and detection of BPs in food analysis. Graphical
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FOOD CHEMISTRY
·
2025
·
IF 9.8
Lin Lv,Hongmei Liu,Lei Wang,Sikai Wang,Yue Li,Guoqi Zhang,Yan Zhao
In this study, an innovative magnetic solid-phase extraction adsorbent based on metal-organic framework UiO-66-NH 2 functionalized polydopamine-modified magnetic multi-walled carbon nanotubes (Fe 3 O 4 @MWCNTs@PDA@UiO-66-NH 2 ) was developed for the selective extraction of trace amounts of quinolones (QNs) from milk and honey. Under optimal conditions, when coupled with ultra-high-performance liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS), the developed approach demonstrated excellent linearity in the concentration range of 0.1–100 μg kg −1 (R 2 ≥ 0.9916). The recoveries for sixteen QNs ranged from 72.4 % to 108.9 %, with relative standard deviations less than 9.40 %. The limits of detection were 0.012–0.450 μg kg −1 for milk and 0.023–0.690 μg kg −1 for honey. Finally, the method was successfully applied to the quantification of QNs in milk and honey samples.
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RSC Advances
·
2025
·Vol. 15
·期 26
·20570-20588
·
IF 4.6
Jiao-Jiao Cao,Jin-Long Ge,Yan Gao,Bo-Kai Liao
This research systematically investigates a library of UiO-66(Zr) dicarboxylate metal–organic frameworks (MOFs), functionalized with polar and nonpolar substituents (–H, –CH3, –NH2), to evaluate their potential as carriers for inhibitor encapsulation, using 8-hydroxyquinoline (8-HQ) as a model compound. The encapsulation process was conducted under vacuum, and 8-HQ uptake was quantified using UV-visible absorption spectroscopy, allowing for precise control over host–guest interactions. Quantitative assessment of 8-HQ loading within each functionalized UiO-66 variant revealed significant variations in uptake efficiency, ranging from 14.66% to 19.45% across the modified frameworks. Furthermore, a density functional theory-based quantitative structure–activity relationship (QSAR) approach was employed to identify key chemical and structural attributes of UiO-66 that significantly influence inhibitor uptake. Multivariate analysis identified two critical physicochemical parameters governing encapsulation efficiency: (1) the dipole moment of the functionalized linkers, which dictates framework-polarity-mediated adsorption, and (2) the hydrogen-bond-donating capacity, which modulates specific interactions with 8-HQ's phenolic oxygen. These descriptors exhibited strong linear correlations with experimental loading data, demonstrating that strategic enhancement of linker polarity and H-bonding capability can amplify inhibitor uptake by 10–20% compared to pristine UiO-66. The QSAR model deciphers MOF performance trends and predicts optimal functional groups via descriptor interpolation, streamlining MOF carrier design for corrosion and drug applications through targeted linker engineering.
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NEW JOURNAL OF CHEMISTRY
·
2026
·
IF 2.6
Mengjia Sheng,Xiang Zhang,Zhen Song,Hongye Cheng,Zhiwen Qi
The rapid development of dye industry has led to a significant amount of wastewater discharged. As a widely-used dye, toxic and non-degradable methylene blue is becoming a serious threat to our ecosystem. Thus, wastewater containing methylene blue must be treated properly. Considering the strengths of ionic liquid (IL) and metal organic framework (MOF) in molecular separation, a convenient solution strategy is proposed in this work for designing and preparing IL@MOF composite adsorbent in order to efficiently remove methylene blue from water. As a kind of water-stable MOFs, UiO-66 was synthesized by a one-pot method under very mild conditions using deep eutectic solvent (DES) as reaction media instead of conventional organic solvents. The easily obtained UiO-66-DES has superior MB adsorption kinetics but limited adsorption capacity. To mitigate this weakness, a computational and systematic IL screening framework is developed. [EtOHMIM][PF6] is eventually selected from 3569 candidates and incorporated into the UiO-66-DES. The resulted IL@MOF composite maintains the fast MB adsorption while importantly increasing the adsorption capacity from 45.85 mg/g to 227.57 mg/g. Given 10 mg/L MB solution, the removal rate is improved from 34% to 91% in 5 minutes. Meanwhile, the adsorption capacity is almost unchanged after 5 regeneration cycles, which offers great potentials for practical applications. Finally, the detailed mechanism analysis reveals that the loaded IL introduces new adsorption sites with stronger interactions with MB. These results show that the [EtOHMIM][PF6]@UiO-66-DES composite resulted from DES-assisted MOF synthesis and IL-based post-synthesis is a promising material for efficient MB wastewater treatment.
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