JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
·
IF 9.7
Jingyu Pan,Dezhou Gao,Longhui Li,Enjie Wu,Ling Xiang,Qing Shang,Ming Jiang,Guang Yang,Xupin Zhuang
Metal-organic frameworks (MOFs) have been widely used as high-performance proton-conducting materials of proton exchange membranes (PEMs) for efficient proton exchange membrane water electrolysis (PEMWE) due to their precisely tunable structures and versatile chemical functionalization. However, the poor distribution of MOFs within polymer matrices and their limited proton transport pathways remain substantial challenges. In this work, a silane-networking strategy is proposed to construct silane-networked UiO-66-NH₂ (Si-UiO-66-NH₂), which serves not only as a spatial barrier through Si–O–Si crosslinking to inhibit self-aggregation but also as a proton-conductive mediator via superficial polar groups that enhance proton transport. The resulting silane-networked MOFs exhibit enhanced interfacial compatibility with the Nafion matrix, thereby promoting uniform dispersion of MOF particles throughout the polymer network. More impressively, the abundant polar functional groups of silane-networked MOFs reorganize the hydrophilic/hydrophobic microphase-separated structure of the membrane, facilitating the formation of continuous, low-energy-barrier proton transport channels. Benefitting from these structural enhancements, the composite membranes exhibit excellent performance, including a low swelling ratio of 15.7 % at 80 °C and high proton conductivity (236.4 mS·cm −1 ). When applied in a water electrolyzer, the optimized Si-UiO-66-NH₂@Nafion membrane results in a significantly reduced cell voltage of 1.887 V at a current density of 3.0 A·cm −2 at 80 °C, representing a 15.3 % decrease compared to the system using recast Nafion. This work introduces an effective ionomer/filler interfacial modulation strategy to improve the water electrolysis performance of PEMs.
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Surfaces and Interfaces
·
2025
·
IF 6.3
Xiao Ling,Xiaofeng Guo,Ke Wang,Ziming Huang,Zhixuan Mo,Huibo Qin,Linhai Duan,Xiuhong Meng,Hui Wang
Photocatalytic degradation of organic pollutants in water represents a highly promising strategy for environmental remediation. However, conventional photocatalysts are hampered by their inefficient employment of visible light energy and the propensity of photoinduced charge carriers to undergo recombination. To overcome these limitations, Z-scheme photocatalyst UiO-66-NO 2 @ Ag/AgCl (UiO@Ag-X, where X denotes the Ag/AgCl content) composites were designed and prepared. The crystal structure, morphology, photocatalytic performance, light absorption capacity, and carrier separation efficiency were systematically tested. Optical and electrochemical measurements revealed that the incorporation of Ag/AgCl enhanced the segregation and transfer efficiency of charge, which is crucial for boosting photocatalytic activity. These improvements directly contributed to the enhanced degradation efficiency observed in subsequent experiments. In experiments using methyl violet (MV) as the model pollutant, the photocatalytic degradation performance of UiO@Ag-X samples was evaluated. Among these samples, UiO@Ag-50 achieved a remarkable degradation efficiency under light irradiation. Moreover, the corresponding kinetic rate constant was about 0.04724 min -1 , which was higher than that of UiO-66-NO 2 . Quenching experiments were employed to investigate the mechanisms related to photocatalysis. The results show that hydroxyl radicals play an important role in the degradation of MV.
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ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
YinZuo Wu,Guoqian Xu,HaiBang Zhang,Ziyue Fu,Hedong Jiang,Pingchun Guo,Yanxiang Wang,Shijin Yu,Hua Zhu
Solid electrolytes offer the advantages of a wide temperature operating range, high safety, and excellent cycling stability. However, their commercialization is hindered by challenges such as low ionic conductivity, high interface impedance, and poor mechanical properties. In this study, a metal-organic framework material UiO-66 was synthesized and subsequently modified with -NH 2 and -NO 2 functional groups. The modified material was blended with poly(ethylene oxide) (PEO) to produce a composite polymer solid electrolyte, which was used to assemble a Li||Li symmetric battery. The experimental findings revealed that UiO-66-NH 2 /PEO exhibited high ionic conductivity of 6.79 × 10⁻⁴ S/cm at 60°C, a high Li + transference number of 0.49, and a wide electrochemical window of 5.1 V. Notably, its lithium-ion transference number was higher than that of UiO-66/PEO (0.27) and UiO-66-NO 2 /PEO (0.36). Moreover, UiO-66-NH 2 /PEO demonstrated improved interface compatibility and lower interface impedance, presenting a promising material option for advancing the field of all-solid-state lithium-ion batter.
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LANGMUIR
·
2025
·
IF 3.9
Zongli Ren,Yali Fang,Qiong Wu,Xin Ma
Dye wastewater poses a significant environmental threat, making the development of efficient and reusable adsorbents essential. In this study, we prepared a magnetic UiO-66 composite modified by β-CD (UiO-66@β-CD@Fe3O4) and evaluated the adsorption properties of this material on crystal violet and Congo red in aqueous solutions. β-CD was added to improve the host–guest interaction with dyes, and the Fe3O4 core made magnetic separation simple. Kinetic analysis supports the pseudo-second-order model, indicating that chemisorption is the main factor controlling the adsorption rate. Based on the Langmuir isotherm, the data suggest that adsorption occurs as a monolayer on a homogeneous surface. Maximum adsorption capacities were 542.75 mg/g for Congo red and 377.25 mg/g for crystal violet. Calculated thermodynamic values reflected an endothermic and energetically favorable adsorption mechanism. Additionally, the magnetic properties of UiO-66@β-CD@Fe3O4 enabled easy separation by using an external magnet. Strong adsorption performance was maintained by the material even after several adsorption–desorption cycles, indicating its reusability. UiO-66@β-CD@Fe3O4 exhibits promising performance in addressing dye-contaminated wastewater, confirming its application potential.
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MICROCHEMICAL JOURNAL
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2025
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IF 5.1
Ziwei Guo,Jingce Bi,Yi Wang,Xiaoguang Sang,Xia Zhang,Zhuopeng Wang,Yide Han
Metal-organic framework materials (MOFs) have shown great promise in electrochemical sensing applications due to their high specific surface area, excellent thermal and chemical stability. However, the practical application of MOFs in non-enzymatic electrochemical glucose sensing is limited by their inherent drawbacks, such as poor electrical conductivity and low mass transfer efficiency. To overcome these challenges, we successfully synthesized a Co@UiO-66-NH 2 /acetylene black (Co@UiO-66-NH 2 /AB) nanocomposite through a dual-solvent method followed by mechanical grinding method and applied it as an efficient electrochemical glucose sensor. Experimental results demonstrate that the Co@UiO-66-NH 2 /AB nanocomposite exhibits significantly enhanced electrochemical sensing performance for glucose detection, compared to pure Co@UiO-66-NH 2 . Specifically, 0.5Co@UiO-66-NH 2 /AB nanocomposite achieves sensitivities of 89.60 μA·mM −1 ·cm −2 and 37.65 μA·mM −1 ·cm −2 in the linear ranges of 0–800 μM and 800–6000 μM, respectively, with a low detection limit of 2.31 μM and a rapid response time of approximately 3.6 s. Additionally, 0.5Co@UiO-66-NH 2 /AB nanocomposite demonstrates remarkable stability, with the current signal remaining nearly constant over an extended period of 3000 s. This enhanced performance can be attributed to the abundant active sites provided by Co@UiO-66-NH 2 , coupled with the enhanced electrical conductivity imparted by acetylene black. Moreover, the sensor exhibits minimal interference from common interfering substances, such as uric acid, dopamine hydrochloride, and ascorbic acid, was observed during glucose detection. Meanwhile, the 0.5Co@UiO-66-NH 2 /AB nanocomposite was also applied for the rapid determination of glucose in bovine serum albumin. Consequently, the Co@UiO-66-NH 2 /AB nanocomposite holds great potential for application in electrochemical biosensors.
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Desalination and Water Treatment
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2024
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IF 1
Honghuan Yin,Huaiwen Wang,Dongai Wang,Miaomiao Shi,Xi Xu,Jiaqi Yang
Developing low-cost and stable adsorbent is urgent and attractive to remove hazardous dye from water. In this study, zirconium based metal-organic framework (NH 2 -UiO-66) was grown on waste wool fibers and the fabricated composite adsorbent (NH 2 -UiO-66/wool) was used to remove anionic dye methyl orange (MO). After characterizing the adsorbents, we determined the effect of pH and initial concentration of MO on adsorption performance. Moreover, adsorption kinetics and isotherms were conducted to reveal the adsorption mechanism. The results showed that NH 2 -UiO-66/wool achieved the highest adsorption capacity at natural pH with the maximum adsorption of 61.0 mg/g adsorbent, which is higher than most biomass based adsorbents. Moreover, NH 2 -UiO-66/wool enabled a broad range of pH (3−11) and initial concentration of MO (10–50 mg/L). Adsorption kinetics and isotherms of NH 2 -UiO-66/wool fitted well with pseudo-second-order model and Langmuir mode, respectively. NH 2 -UiO-66/wool presented 40.3 times higher of kinetics constant than that of original wool in the presence of initial MO concentration of 10 mg/L due to the positive nature of NH 2 -UiO-66. Ultimately, NH 2 -UiO-66/wool presented excellent regeneration ability with 500 mg/L NaCl solution and regeneration efficiency remained 98% after 10 cycles. Overall, this work may provide new insights into the development of MOFs/wool adsorbents for enhanced dye removal.
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Biosensors-Basel
·
2024
·Vol. 14
·期 10
·512
·
IF 4.9
Jiawen Fan,Junjie Qi,Jingkun Li,Fuwei Pi
Arginine has been widely applied in the food industry as coloring agents, flavoring agents, and nutritional fortifiers. It is also one of the major components of feed additives. Currently, methods for the highly selective detection of arginine remain absent. For accurate and sensitive detection of L−arginine, a novel ratiometric fluorescence assay based on Ru@UiO-66-NH2was developed and demonstrated in this study. Under optimized detection conditions, the limit of detection (LOD) of this assay for L-arginine was 2.32 μM, which is superior to most assays reported to date. Meanwhile, Ru@UiO-66-NH2showed good stability within 30 days, demonstrating the wide applicability of the proposed assay. The spike-and-recovery rates of the proposed assay for L-arginine in real samples (e.g., tea, grape juice, and serum) were 84.27–113.09%. Overall, the proposed assay showed high sensitivity, good reproducibility, and excellent stability in the detection of L-arginine in both buffer and real samples.
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POLYMER BULLETIN
·
2025
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IF 4
Zhang Chengpeng,Bei Pengzhi,Liu Hongjing,Zhao Xu,Shi Meiling,Jing Xiaochun,Li Zhao,Yao Hui
A novel porous liquid, M2070-UiO-66-OH@[BMim][PF 6 ], has been synthesized using zirconium-based metal–organic framework (UiO-66-OH), 1-butyl-3-methylimidazolium hexafluorophosphate ([BMim][PF 6 ]) and polyetheramine M2070. To enhance the CO 2 separation performance, M2070-UiO-66-OH@[BMim][PF 6 ] was incorporated as a filler into a mixed matrix membrane (MMM) using polyether block amide (Pebax-1657) as the membrane matrix. The properties of the synthesized M2070-UiO-66-OH@[BMim][PF 6 ] and the resulting MMMs have been characterized through FTIR, TGA, DSC, and SEM analyses. The results of porous liquid stability revealed that grafting polyetheramine M2070 onto the surface of UiO-66-OH@[BMim][PF 6 ] significantly increased the steric hindrance, thereby preventing agglomeration within the membrane. Additionally, the functional groups (amino and ether) present in M2070-UiO-66-OH@[BMim][PF 6 ] contributed to an increased number of active sites for CO 2 adsorption, facilitating enhanced CO 2 transport through the membrane. Compared to the Pebax membrane, the MMM containing 3% M2070-UiO-66-OH@[BMim][PF 6 ] exhibited significantly improved CO 2 permeability of 104.07 Barrer (an increase of 73.22%) and CO 2 /N 2 selectivity of 92.37 (an increase of 148.95%) at 30 °C and 0.3 MPa, surpassing the 2008 Robeson upper bound. These findings suggest that M2070-UiO-66-OH@[BMim][PF 6 ] is a highly promising additive for the fabrication of mixed matrix membranes with superior CO 2 separation performance. Graphical abstract A porous liquid, (M2070-UiO-66-OH@[BMim][PF 6 ]) has been prepared using UiO-66-OH@[BMim][PF 6 ] as the core and polyetheramine M2070 as the canopy. Afterwards, M2070-UiO-66-OH@[BMim][PF 6 ] has been added to the Pebax matrix to prepare M2070-UiO-66-OH@[BMim][PF 6 ]/Pebax mixed matrix membranes, which have been subjected to gas separation studies.
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Catalysts
·
2024
·Vol. 14
·期 3
·180
·
IF 3.8
Xiaoxiao Dong,Chengnan Zhang,Prasanna J. Patil,Weiwei Li,Xiuting Li
Metal–organic frameworks (MOFs) are regarded as excellent carriers for immobilized enzymes due to their substantial specific surface area, high porosity, and easily tunable pore size. Nevertheless, the use of UIO−66 material is significantly limited in immobilized enzymes due to the absence of active functional groups on its surface. This study comprised the synthesis of UIO−66 and subsequent modification of the proline (Pro) on UIO−66 through post-synthetic modification. UIO−66 and UIO−66/Pro crystals were employed as matrices to immobilizeRhizopus oryzaelipase (ROL). The contact angle demonstrated that the introduction of Pro onto UIO−66 resulted in favorable conformational changes in the structure of ROL. The immobilized enzyme ROL@UIO−66/Pro, produced via the covalent-bonding method, exhibited greater activity (0.064715 U/mg (about 1.73 times that of the free enzyme)) and stability in the ester hydrolysis reaction. The immobilized enzymes ROL@UIO−66 (131.193 mM) and ROL@UIO−66/Pro (121.367 mM), which were synthesized using the covalent-bonding approach, exhibited a lowerKmand higher substrate affinity compared to the immobilized enzyme ROL@UIO−66/Pro (24.033 mM) produced via the adsorption method. This lays a solid foundation for the industrialization of immobilized enzymes.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Tiantian Wang,Lingfeng Zhao,Guanhua Liu,Xiaoyang Yue,Xiaobing Zheng,Li Ma,Yunting Liu,Mimi Chen,Yanjun Jiang
The concentration of micropollutants (MPs) in water is low, but they are highly harmful and difficult to remove. Biocatalytic membrane combines membrane separation and enzyme catalysis thus being efficient. Herein, a sulfonated covalent organic framework (SCOF) was grown in situ on the surface of a hydrolyzed polyacrylonitrile (HPAN) membrane coated with a polydopamine (PDA) layer to provide a defect-free substrate layer for the pressure-assisted self-assembly of rigid UiO-66-NH 2 nanoparticles and organic laccase with electrostatic attraction. In the obtained multilayer loose biocatalytic membrane, UiO-66-NH 2 nanoparticles can provide trans -membrane mass transfer channels for water molecules and intercept pollutants, and laccase can degrade MPs and eliminate defects among UiO-66-NH 2 nanoparticles. By optimizing the membrane preparation conditions, the biocatalytic membrane has a bisphenol A (BPA) removal rate of 96.9%. The removal rate of dyes can reach more than 98% with a pure water permeance of 211.3 LMH/bar, and the generally < 20% salt removal efficiency endows the membrane with good dye/salt separation ability. At the same time, the membrane has BPA removal rate of over 80% under pH of 4 ∼ 11 and feed BPA concentration of 4–100 mg/L, respectively. The membrane initial activity can maintain more than 90% after 10 days of storage in aqueous solution. After 7 times of reuse, the removal rate of BPA was still more than 60%. Overall, this study opens up a convenient avenue for the facial fabrication of multilayer biocatalytic membranes for efficient MPs removal.
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ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Yongchao Wang,Qing Yang,Fangli Yi,Ruowei Lu,Yanxia Chen,Cheng Liu,Xinyu Li,Cuijuan Wang,Hongjian Yan
The poor stability and low catalytic activity of NH2-UiO-66 in basic solutions require the reactions to be conducted in acidic solutions, which seriously hinders its potential photocatalytic application. Herein, we report that NH2-UiO-66 coated with two-dimensional covalent organic frameworks (COFs) via imine bond connection presents not only high photocatalytic activity but also high stability and adaptability to the solution environment. The NH2-UiO-66/COF hybrid material was fabricated through the Schiff base reaction of NH2-UiO-66 with 4,4′,4″-(1,3,5-triazine-2,4,6-triyl)trianiline (TAPT) and 2,4,6-triformylphloroglucinol (TP). The hybrid material showed high stability in an alkaline environment, with only 4.7% of NH2-UiO-66 decomposed after the photocatalytic reaction. The optimum photocatalytic H2 evolution rate was 8.44 mmol·h–1·g–1 when triethanolamine was used as an electron-donating agent. The results presented here illustrate the possibility for effectively improving both the photocatalytic performance and stability of NH2-UiO-66 by coupling with COFs.
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KOREAN JOURNAL OF CHEMICAL ENGINEERING
·
2022
·Vol. 39
·期 7
·1839-1849
·
IF 3.146
Zhang Xiaoting,Zhang Shusheng,Ouyang Gangfeng,Han Runping
A zirconium-based metal organic framework (UiO-66-NH 2 ) was prepared using a greener approach for the removal of hexavalent chromium (Cr(VI)) from solution. The characterization of UiO-66-NH 2 was performed using several methods, and the influence of the solution pH, adsorbent dosage, salt, adsorption time, Cr(VI) concentration and adsorption temperature on adsorption quantity was performed in batch mode. UiO-66-NH 2 can efficiently remove Cr(VI) through the synergistic effect of adsorption and reduction. At pH solution of 1.1 and solid-to-liquid ratio of 2 g·L −1 , the removal rate of 100 mg·L −1 Cr(VI) increased to 95.2%. The maximum adsorption capacity of UiO-66-NH 2 from Langmuir model was 252 mg·g −1 . The adsorption equilibrium process can be well described by Langmuir, Koble-Corrigan and Temkin models, while the kinetic process can be predicted by pseudo-second-order and Elovich model. UiO-66-NH 2 showed a good adsorption capacity in a wide range of pH (pH=1.1–10) and also had better regeneration performance after five cycles using 0.01 mol·L −1 NaOH; consequently, it can be a promising adsorbent for the removal of Cr(VI) from solution.
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