Journal of Water Process Engineering
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2025
·
IF 6.7
Shuang Xu,Liqin Wang,Feng Wang,Shangjun Fu,Wei Meng,Guowen He,Wenxiu Cao,Wei Zhang
Developing efficient strategies for the removal of organic dyes from aqueous systems remains crucial for environmental remediation. Metal-organic frameworks (MOFs), particularly UiO-66, show exceptional promise as adsorbents; however, they suffer from limited dye uptake capacity. This study addresses this limitation through strategic hybridization of UiO-66 with renewable carbohydrates (glucose and fructose), achieving enhanced performance while reducing costs. The optimized glucose/UiO-66 and fructose/UiO-66 composites demonstrated superior adsorption capacities compared to pristine UiO-66 across multiple dyes: methylene blue (76/69 mg/g), malachite green (73/67 mg/g), rhodamine B (50/59 mg/g), methyl orange (81/169 mg/g), and Congo red (99/198 mg/g). Adsorption efficiency correlated with dye molecular dimensions and the composite's phenolic hydroxyl content. Kinetic analysis revealed pseudo-second-order adsorption behavior dominated by chemisorption via electrostatic and π–π interactions. Notably, fructose-modified composites exhibited exceptional performance for anionic dyes (methyl orange and Congo red), suggesting charge-selective adsorption mechanisms. This work establishes carbohydrate-MOF hybridization as an effective strategy for designing multifunctional adsorbents, providing fundamental insights into structure-performance relationships for environmental applications.
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JOURNAL OF MATERIALS SCIENCE
·
2026
·Vol. 61
·期 45
·35376-35386
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IF 4.4
Lai Delin,Wang Haoguang,Kong Gang,Che Chunshan,Miao Xinrui
A fluorine-free and environmentally friendly ultra-slippery superhydrophobic (USS) coating was successfully prepared through a simple one-step calcination process using UiO-66@polydimethylsiloxane (PDMS) as the precursor. During the calcination process, a composite structure consisting of UiO-66 derived ZrO 2 and oligomers derived from partial decomposition of PDMS endows the coating with excellent slippery superhydrophobicity. The coating exhibits notable anti-condensation performance, which can effectively inhibit water vapor condensation in humid environments and extend the freezing-thawing cycle time of water droplets under low-temperature conditions, while maintaining its stable superhydrophobic properties. Additionally, the USS coating possesses outstanding oil-water separation capability: The stainless-steel mesh modified by the USS coating achieves a separation flux of up to 40000 L h⁻ 1 m⁻ 2 for trichloromethane and retains a separation efficiency of over 90% as well as a WCA exceeding 150° even after 15 cycles. USS-coated cotton fabrics possess superior flame retardancy. By absorbing flame heat and generating a dense char layer, the coating inhibits combustion and cuts down black smoke emission, while keeping the fabric’s structural integrity and superhydrophobicity intact. This work provides a facile, low-energy, and environmentally friendly strategy for the preparation of multifunctional superhydrophobic coatings, overcoming the limitations of complex processes, high-energy consumption, and environmental harm in traditional superhydrophobic coating preparation.
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MOLECULES
·
2024
·Vol. 29
·期 17
·4195
·
IF 4.2
Yu Wang,Zhimin Yang,Xichang Wu,Wenxuan Quan,Qi Chen,Anping Wang
In the present study, an acid catalyst (UiO-66-SO3H) with Brønsted and Lewis acid sites was synthesised for the preparation of highly efficient biodiesel from oleic acid and methanol using chlorosulphonic acid sulfonated metal–organic frameworks (UiO-66) prepared with acetic acid as a moderator. The prepared catalysts were characterised using XRD, SEM, FT-IR and BET. The catalytic efficiency of the sulfonated catalysts was significantly improved and successful sulfonation was demonstrated by characterisation techniques. Biodiesel was synthesised by the one-pot method and an 85.0% biodiesel yield was achieved under optimum conditions of the reaction. The esterification reaction was determined to be consistent with a proposed primary reaction and the kinetics of the reaction was investigated. A reusability study of the catalyst (UiO-66-SO3H) was also carried out with good reproducibility. In conclusion, the present study provides some ideas for the synthesis of catalysts with high catalytic activity for the application in the catalytic preparation of biodiesel.
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INORGANIC CHEMISTRY COMMUNICATIONS
·
2025
·
IF 5.4
Jun Hu,Ye Cao,Lu Cai,Guanzheng Wu,Yuanyu Ge,Ling Lin,Ziyin Li
Metal-organic frameworks (MOFs) based proton conductors, as a promising alternative to proton exchange membranes, are in urgent need of developing effective methods to enhance their proton conductivity. Here, we report the enhanced and ultra-fast proton conduction facilitated by the post-covalent bonding of the flexible zwitterionic arm (sulfobetaine methacrylate: SBMA) with UiO-66. A new zwitterionic MOF based proton conductor (UiO-66-SB) exhibits the higher proton conductivity of 0.1 × 10 −2 S·cm −1 but with the activation energy ( E a ) of only 5.8 kJ/mol at 85 °C and 90 % RH, indicating ultra-fast proton transport. This result was attributed to the continuous and shorter hydrogen bonded network formed by flexible zwitterionic arms, water molecules, and residual –NH 2 . This work also demonstrates that zwitterions are highly advantageous as proton carrier media for the post-modification of MOFs.
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MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2025
·
IF 4.6
Rongrong Yu,Jingjing Wang,Xinyu Zhi,Danyi Yang,Yongqi Zhao,Guifeng Chen,Chengchun Tang,Yi Fang
With growing concerns about antibiotic contamination in water environments, developing efficient photocatalysts for tetracycline (TC) degradation has become imperative. In this study, a novel nanoflower-like BiOI/UiO-66(Ce/Fe) S-scheme heterojunction photocatalyst was developed for efficient TC degradation under visible light. Experimental evaluations revealed that the optimized 0.05-Bi/U(Ce/Fe) sample achieved 99.5 % TC degradation efficiency, maintaining 88.8 % of its initial activity after four consecutive cycles. The superior photocatalytic activity arises from three synergistic mechanisms: Fe 3+ doping modulates the band structure to broaden visible-light absorption, while the synergistic effect of Ce 4+ /Ce 3+ and Fe 3+ /Fe 2+ redox pairs optimizes charge transport. The internal electric field at the BiOI/UiO-66(Ce/Fe) heterojunction enhances charge separation while maximizing the redox capacity of the photocatalyst. Radical capture experiments and LC-MS analysis confirmed ·O 2 − and ·OH as the dominant reactive radicals, with proposed possible degradation pathways. Thus, a new synergistic strategy for designing efficient photocatalysts is proposed in this work.
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MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Daidai Wang,Ying Cao,Moustafa Zahran,Xinchun Liu,Xiaoyue Hui,Ahmed S. Abou- Elyazed,Hui-Ying Qu,Xiaolin Li
This study reports a novel electrochemical sensor based on a metal-organic framework (MOF) derivative to measure urea in sweat. The MOF structure, UiO-66(Zr), was greenly synthesized using a solvent-free thermal method, functionalized with molybdenum disulfide (MoS 2 ), and then thermally treated to form carbon-coated UiO-66(Zr)@MoS 2 . The MOFs were characterized by X-ray diffraction, an N 2 adsorption instrument, scanning electron microscopy, and an X-ray photoelectron spectrometer. Among the prepared MOFs, the carbon-coated UiO-66(Zr)@MoS 2 showed many crystal defects, providing more active sites required to improve the electrocatalytic activity, and high carbon content to enhance the electrical conductivity of the stainless steel (SS) electrode. The electrocatalytic activity of the MOFs was evaluated using cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and square wave voltammetry (SWV). CV studies showed poor catalytic activity of bare SS electrode and its modifiers, UiO-66(Zr), carbon-coated UiO-66(Zr), and UiO-66(Zr)@MoS₂, towards urea (0.1 mM) oxidation. In contrast, the carbon-coated UiO-66@MoS₂ modifier exhibited a urea oxidation peak with a current value of 5 μA, confirming its high electrocatalytic activity. Compared to CV, SWV exhibited a higher oxidation peak current (7.5 μA). Additionally, the EIS showed a 38.4 % reduction in the electron transfer resistance after SS electrode modification with the carbon-coated UiO-66(Zr)@MoS₂. The SWV sensor exhibited lower detection and quantification limits of 0.4 and 1.4 μM, respectively. Additionally, it showed high selectivity in the presence of possible interfering substances, such as glucose, lactic acid, ascorbic acid, cortisol, and sodium chloride. Moreover, its efficacy for measuring urea in artificial sweat samples was proved with acceptable recovery values.
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APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Jialin Niu,Yulong Xiang,Xiaoli Dong,Yu Wang,Nan Zheng,Pei Yu
Hexavalent chromium in industrial wastewater poses a serious threat to ecosystems. Photocatalytic technology has been seen as a promising strategy for removing heavy metal ions. Construction of heterostructures offered a promising strategy to enhance the separation efficiency of photogenerated carriers, thereby improving photocatalytic performance. Herein, ZnWO 4 /UiO-66-NH 2 heterostructures were synthesized by a two-step hydrothermal method. The synthesized samples were systematically characterized via a variety of techniques, alongside an exploration of the associated photocatalytic mechanism. ZnWO 4 /UiO-66-NH 2 -2 exhibited an exceptional photocatalytic performance, attaining a 97 % degradation of hexavalent chromium within 60 min, approximately 1.3 and 4.7 times that of UiO-66-NH 2 and ZnWO 4 , respectively. The transient photocurrent response, photoluminescence (PL), and electrochemical impedance spectroscopy (EIS) results indicate that constructing heterostructures can effectively accelerate the migration of electrons while simultaneously suppressing the recombination process of photogenerated carriers. In addition, Active species trapping experiments revealed that the photogenerated electrons were the main active substances in photoreduction reaction. This study offers an effective strategy for photocatalytic reduction of hexavalent chromium.
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CHEMPHYSCHEM
·
2025
·
IF 2.2
Kan Hu,Dingchen Wang
The construction of efficient Z-scheme heterojunctions is considered as a promising approach to improve the transfer and separation of photogenerated carries in the field of photocatalytic hydrogen evolution from water splitting. Herein, a novel CdS/UiO-66(Ce) with Z-scheme heterostructure is successfully fabricated from metal sulfide CdS and cerium-based UiO-66 metal–organic framework via a hydrothermal method. The Z-scheme CdS/UiO-66(Ce) heterojunctions can provide abundant active centers, broaden the response range to visible-light region, accelerate the transfer of interfacial charges, and suppress the recombination rate of photogenerated electron–hole pairs. As a result, CdS/UiO-66(Ce) (ω(CdS) = 30%) exhibits a hydrogen production rate of 1.975 mmol g −1 h −1 , which is 19.1 times higher than that of UiO-66(Ce). Overall, this article may provide a new pathway for the rational design of efficient Z-scheme heterojunctions with photocatalytic hydrogen evolution. Graphical The Z-scheme heterojunction is a pivotal design strategy in photocatalysis for balancing efficient charge separation and strong redox capability. In this article, a Z-scheme CdS/UiO-66(Ce) heterojunction is constructed by combining cerium-based metal–organic framework UiO-66(Ce) with CdS and achieved efficient photocatalytic water splitting for 1.975 mmol g −1 h −1 hydrogen evolution under visible light, which is 19.1 times higher than UiO-66(Ce).
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Russian Journal of Physical Chemistry A
·
2026
·Vol. 100
·期 10
·2542-2555
·
IF 0.7
Lili Li,Li Jiaxin,Ma Yuyu,Shu Jing
The Ce-UiO-66-NH 2 material was successfully prepared by oil bath method, and TiO 2 and PANI were compounded on the basis of it, which improved the degradation efficiency of rhodamine B (RhB). XRD, TEM, and XPS characterization confirmed that the composite material formed a core-shell structure and polyaniline was uniformly coated. The composite with 20 μL aniline and CTAB surfactant showed the highest degradation efficiency, and the degradation rate of RhB reached 99.90% within 60 min under ultraviolet light irradiation. The band alignment and free radical trapping experiments show that it follows the ternary Z-type heterojunction mechanism, \( \bullet {\kern 1pt} {\text{O}}_{2}^{ - }\) is the main active species. It provides a new idea for the design of high-performance photocatalysts and is of great significance for promoting the application of photocatalytic technology in water pollution control.
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NANO
·
2026
·
IF 1.3
Congcong Bai,Hongying Hou,Wenting Mao,Runjie Wu
Poor conductivity of UiO-66 severely limited the electrochemical performances in the supercapacitors, which were alleviated and improved by combining with polypyrrole (PPy) with high conductivity and pseudocapacitive properties. Herein, a series of UiO-66@x%PPy ( x = 5 , 1 0 , 2 0 , 3 0 ) composites were prepared by solvothermal reaction followed by in-situ polymerization of pyrrole(PPy); furthermore, the influence of PPy’s loading on the structural properties was also systematically investigated. Desirably, the obtained composites maintained the “rigid-flexible” core-shell octahedral structure. Furthermore, the UiO-66@20%PPy composite exhibited the highest electrochemical performances with the specific capacitance of 204.1 F/g in a three-electrode system and 118.18 F/g in a two-electrode system at 1 A/g. Furthermore, the asymmetric two-electrode supercapacitor exhibited a high capacitance retention of 88.25% after 2000 cycles at 2 A/g. The synergistic effect between the continuous three-dimensional (3D) conductive network of PPy phase and the double-layer capacitance of porous UiO-66 framework may be responsible for the desirable results. Seemingly, an effective interfacial strategy was indeed beneficial for developing a high-performance UiO-66-based supercapacitor.
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ANALYTICAL CHEMISTRY
·
2026
·
IF 7.3
Yong Li,Dongping Fang,Chao Yang,Xike Tian,Yulun Nie,Jianbo Shi
The detection of per- and polyfluoroalkyl substances (PFASs) in the environment is critical due to their adverse health effects, but it remains challenging because of the high cost and technical complexity of standard analytical methods. We developed a series of rare earth-based bimetallic metal–organic frameworks (MOFs) for the sensitive and efficient fluorescence detection of perfluorooctanoic acid (PFOA). By systematically modulating the ligand functional groups with amino (−NH2), hydroxyl (−OH), and fluorine (–F) moieties, the influence of ligand electronegativity on the PFOA recognition performance was evaluated. The experimental results demonstrated that the local electrostatic potential of the MOFs, governed by the functional groups, is a critical factor in determining the PFOA binding affinity and fluorescence sensitivity. Eu/UiO-66-NH2 demonstrated the highest sensitivity and selectivity for rapid fluorescence detection of PFOA, which was due to its strong positive electrostatic potential to facilitate binding via electrostatic attraction and synergistic hydrogen bonding. PFOA concentrations in actual water samples can also be determined by Eu/UiO-66-NH2. These findings provide theoretical insights and experimental support for the functional design of MOF-based sensors, paving the way for the sensitive and selective detection of PFASs.
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TURKISH JOURNAL OF CHEMISTRY
·
2026
·Vol. 50
·期 3
·285-299
·
IF 2
LI JUANHONG,WANG SUQIN,LIU XIN,LIU FENG
A [H]-accelerated catalytic Fenton system was developed using Pd/UiO-66(Zr)-F4 as the catalyst. This system enabled the regeneration of Fe²⁺ and facilitated the continuous generation of both ·OH and 1O2 through [H]-mediated electron transfer at ambient temperature and pressure. Under the conditions of 0.2 g L−1 catalyst (Pd loading 0.516 wt%), 25 μM Fe2+, 60 mL min−1 H2 flow (as the [H] source), 20 mM H2O2, and pH 3, approximately 89% of carbamazepine (initial concentration 20 mg L−1) was degraded within 3 h using trace iron. However, the catalytic activity of Pd/UiO-66(Zr)-F4 gradually declined from 89% to 53% over six reaction cycles. This decrease was likely due to loss of specific surface area caused by microstructural degradation associated with hydrogen spillover effects.
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