APPLIED ORGANOMETALLIC CHEMISTRY
·
2025
·Vol. 39
·期 4
·e70109
·
IF 0
Yun Xiong,Yifan Shu,Shi Cai,Shengpeng Liu,Xiaoyu Wu
The efficient separation of gases under high-temperature industrial conditions is crucial for addressing global energy and environmental challenges, particularly in processes such as CO₂ capture in natural gas processing, power plant flue gas treatment, and cement plant emissions. However, conventional membranes often suffer from interfacial defects, low gas selectivity, and poor thermal stability, which limit their practical applications. In this study, we aimed to develop high-performance mixed matrix membranes (MMMs) to improve CO₂/CH₄ separation performance. Amino-functionalized UiO-66-NH₂ was incorporated into a polyimide (PI) matrix using a simple, scalable fabrication process involving phase inversion and thermal imidization, which ensured uniform dispersion of UiO-66-NH₂ particles and facilitated large-scale production of dense, defect-free membranes. At an optimal UiO-66-NH₂ loading of 2 wt%, the MMMs achieved a CO₂ permeability of 451 Barrer and a CO₂/CH₄ selectivity of 6.62 at 25°C and 0.1 MPa, representing improvements of 23.91% and 114.94%, respectively, compared to pure PI membranes. The performance enhancement was attributed to the increased free volume within the membrane and the strong Lewis acid–base interactions between the amino groups of UiO-66-NH₂ and CO₂ molecules. Long-term stability testing at 300°C demonstrated excellent thermal stability, with consistent gas separation performance maintained over 160 h, confirming the membranes' suitability for high-temperature industrial applications. Furthermore, the UiO-66-NH₂/PI MMMs achieved an excellent balance between high permeability and selectivity, outperforming both organic and inorganic membranes, as well as certain traditional MOF-based MMMs. These findings offer a promising strategy for the development of robust and sustainable MMMs for high-temperature industrial gas separation processes.
研究领域:
材料科学
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化学工程
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环境科学
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产品关联
DOI
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Pengfei Li,Yingbo Chen,Fan Xiao,Ming Cao,Jingyu Pan,Jingfeng Zheng,Ke Zhao,Hao Li,Xianglin Zhang,Yuanyuan Zhang
The performance of proton exchange membranes (PEMs) can be enhanced by creating continuous proton conduction channels. In this work, PVP-UiO-66-NH-SO 3 H nanoparticles (PUNSNPs) were prepared and filled into sulfonated poly (ether ether ketone) (SPEEK) to fabricate PUNSNPs/SPEEK composite PEMs. To further improve the performance of the PEMs, phosphoric acid (PA) was doped and a continuous nanopore network was formed in PA/PUNSNPs/SPEEK porous PEMs due to the dissolution of PUNSNPs. The PA/PUNSNPs/SPEEK porous PEMs have high PA uptake ratio (96%–117 %) and dimensional stability thanks to the anchoring effect of the nitrogen-containing heterocyclic ring on the PVP chains. The acid-base pairing interaction between the chains (residual ligands from PUNSNPs) inside the unique continuous nanopore structure allows PA/PUNSNPs/SPEEK = 20 % porous PEMs to have the highest proton conductivity of 0.350 S cm −1 (80 °C/100 % RH). Furthermore, the PA/PUNSNPs/SPEEK porous PEMs retained PA up to more than 80 % (80 °C, 40 % RH, 7 days). Similarly, PA/PUNSNPs/SPEEK = 20 % porous PEMs immersed in deionized water for 45 days were able to maintain a proton conductivity of more than 83 %. Finally, PA/PUNSNPs/SPEEK porous PEMs have low methanol permeability . Thus, this study provides a new method for the preparation of porous PEMs with a continuous nanopore network structure and excellent performance.
研究领域:
材料科学
·
化学工程
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Lin Ma,Jian Gao,Chen Huang,Xiao Xu,Lu Xu,Renhao Ding,Hongliang Bao,Ziqiang Wang,Gang Xu,Qingnuan Li,Pengyang Deng,Hongjuan Ma
Metal–organic frameworks (MOFs) with a high surface area and excellent stability are potential candidates for uranium (U) adsorption. Amidoxime (AO) is the most widely used functional group to extract U, which is usually introduced into MOFs by two-step post-synthetic methods (PSMs). Herein, MOF UiO-66-NH-(AO) was obtained by a one-step PSM with amidoximation from UiO-66-NH-(CN), which was synthesized by a new organic ligand of 2-cyano-terephthalic acid and whose morphology was octahedron and could be well controlled with the new ligand. The one-step PSM can greatly maintain the octahedron of the MOFs. What is more, UiO-66-NH-(AO) showed good adsorption performance for U, the adsorption equilibrium was obtained within 1500 min, and the adsorption capacity of U was calculated to be 134.1 mg/g according to the Langmuir model. It also had excellent selectivity for U in the presence of high concentrations of vanadium (V), ferrum (Fe), magnesium (Mg), calcium (Ca), and zirconium (Zr). The adsorption capacity of U in natural seawater was determined to be 5.2 mg/g within 8 days. The recyclability of UiO-66-NH-(AO) in simulated seawater was demonstrated for at least four adsorption/desorption cycles. The binding mechanism was investigated by the extended X-ray absorption fine structure spectroscopy, revealing that U binding occurs in a fashion η2 motif. This study provides a reliable idea for the modification of MOFs and the potential for MOF-based materials to extract U from seawater.
研究领域:
材料科学
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环境科学
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核能技术
✓ 已验证
DOI
高影响因子
DESALINATION
·
2025
·
IF 9.8
Xuyang Liu,Jian Zhang,Huanping Wu,Fuzhi Li,Zhihui Liu,Yingnan Ma,Jianqiang Meng
Membrane fouling significantly limits the application of membrane separation technology in the treatment of textile dyeing wastewater. In this study, a loose nanofiltration membrane made of polybenzimidazole (PBI) with enhanced antifouling and high-efficiency dye/salt separation capabilities was developed through Ag@UiO-66-NH₂ immobilization and hydrophilic polymer brush grafting. Initially, Ag@UiO-66-NH₂ nanoparticles, possessing antibacterial properties, were incorporated into the PBI base membrane. Subsequently, a brush-like antifouling layer was constructed on the membrane surface by grafting linear polypropylene glycol (PPG) and polyethylene glycol (PEG). Experimental results revealed that the grafting modification substantially improved the membrane's performance: the rejection of the small-molecule dye Methyl Red increased from 16.8 % to 59.6 %, and the membrane surface hydrophilicity was enhanced, leading to a slight improvement in pure water flux. Additionally, the grafted layer effectively suppressed the adsorption of bovine serum albumin, with a flux recovery rate remaining above 90 % after four fouling cycles. Furthermore, the membrane exhibited rejection of <10 % for inorganic salts (Na 2 SO 4 , NaCl, MgSO 4 and MgCl₂), achieving efficient separation of dyes and salts. In tests with simulated textile dyeing wastewater, the membrane's rejection for industrial dyes remained stable at over 90 %, and the addition of surfactants and auxiliaries had no significant impact on its performance. This study shows that the combination of immobilizing MOF nanoparticles with controlled release properties of biocides and grafting hydrophilic polymer brush can effectively improve the separation efficiency and antifouling performance of the membrane, which provides a new method for the treatment of complex textile printing and dyeing wastewater.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2025
·
IF 5.4
Habib Ur Rehman,Shazia Ghaffar,Mujeeb Ur Rahman,Saeed Ahmed,Faakhar Raza
Arsenic as an emerging micropollutant, causing the world ecosystems polluted due to its high toxicity to the environment. In order to removal arsenate As (V), many metal organic frameworks (MOFs) have been synthesized as adsorbents. However, the mostly existing MOFs adsorbents have a slow adsorption rate, agglomeration and poor stability in water.Therefore, it is highly desired to explore a novel adsorbent for the more efficient and rapid removal of As(V) from aqueous solution. Herein, we synthesized monodisperse microspheres with amino functionalized MOF UiO-66 on the silica core for the first time.The synthesized adsorbent was charecterised using scanning electron microscopy (SEM), transmission electron microscopy (TEM), N 2 adsorption desorption isotherms, x-ray diffraction (XRD).The obtained results revealed that it exhibit monodisperse core shell microspheres and showed fast separation of As (V) from aqueous solution. The Kinetic data showed that the As (V) removed rapidly, within 5 min only and the adsorption kinetics described by the pseudo second order kinetic model.The adsorption capacity of the adsorbent was 22.62 μg/g at pH 2. The adsorption experiment showed that adsorbent prepared with UiO-66-NH 2 @SiO 2 could rapidly remove the arsenate from aqueous solution. FTIR results indicated that As (V) is removed successfully from aqueous solution. Electrostatic interaction between UiO-66-NH 2 and As (V) should be the proposed mechanism.
研究领域:
环境科学
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材料科学
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化学工程
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纳米技术
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水处理
✓ 已验证
产品关联
DOI
高影响因子
DESALINATION
·
2025
·
IF 9.8
Lan Ma,Junjie Liao,Hao Yu,Sheng Shi,Liyun Zhang,Xinchuan Ma,Xin Wen,Xinmei Shi
Graphene oxide membranes (GOMs) are a focal point in nanofiltration research due to their exceptional stability and tunable nanometer-scale interlayer structures. However, the weak interactions (e.g., π–π stacking, hydrogen bonding) maintaining GO interlayers are prone to instability, leading to swelling or compression under external stimuli and posing challenges for precise molecular sieving. To address this, the authors propose intercalating PPy-encapsulated UiO-66-NH₂ (PPy@UiO) as a rigid crosslinker within GOMs. The amino groups on PPy@UiO bind adjacent GO layers via electrostatic interactions, suppressing swelling, while the rigid and porous structure enhances mechanical stability without compromising permeability. The GO/PPy@UiO composite membrane exhibits minimal swelling, with interlayer spacing increasing by only 1 Å in hydrated conditions (10.06 Å vs. 9.05 Å dry), significantly less than the 4.7 Å observed in pure GOM. Moreover, the membrane maintains consistent dye rejection performance under both low (1 bar) and high (5 bar) pressures, achieving 71.3 % rejection for methylene blue (MB) and 96.3 % for Evans blue (EBT). Crucially, this structure demonstrates long-term stability over 60 h and allows precise tuning of interlayer spacing and filtration performance by adjusting UiO particle growth. This work provides a practical strategy for designing high-performance, stable, and tunable nanofiltration membranes.
研究领域:
材料科学
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纳米技术
·
膜分离技术
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2020
·
IF 3.99
Mingbo Shi,Renliang Huang,Wei Qi,Rongxin Su,Zhimin He
A universal strategy is developed to construct a superhydrophobic and superoleophilic metal-organic framework (MOF) by an amidation reaction between amino group and acid chloride of octadecanoyl chloride. The introduction of long alkyl chain reduced the surface free energy, yielding a superhydrophobic Zr-MOF (UiO-66-NH-C18) with a high water contact angle (WCA) of 151.7°. The adsorbed amount of water on the UiO-66-NH-C18 was only 5.59 mmol/g, which was just 28 % of that on the UiO-66-NH 2 . More importantly, the hydrophobic modification improved the stability of Zr-MOFs under strong alkaline conditions (e.g., pH = 13). Furthermore, the UiO-66-NH-C18 can selectively absorb organic solvent from water and achieve continuous oil-water separation. The oil-water separation efficiency could reach up to 99.9 %. In addition, the UiO-66-NH-C18@sponge was also prepared through dip-coating of UiO-66-NH-C18 on the melamine sponge in the presence of PDMS solution. The resulting composite shows high adsorption capacities for various oils and organic solvents ranging from 32.3–66.1 g/g. The superhydrophobic UiO-66-NH-C18@sponge has potential as a promising absorbent for treatment of oily wastewater.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Zongmian Zhang,Aiping Yang,Feiyan Wang,Qinghong Kong,He Gao
Mercury ions (Hg 2+ ) are extremely toxic, posing severe risks to human health and ecosystems even at trace concentrations. Their prevalence necessitates the development of rapid, selective, and portable methods for on-site Hg 2+ detection in environmental monitoring. Here we report a surface-enhanced Raman scattering (SERS) sensor that employs a capillary-immobilized Ag@UiO-66-NH 2 nanocomposite as the substrate for the indirect detection of Hg 2+ . The inner wall of a glass capillary was amino-functionalized and sequentially decorated with silver nanoparticles (AgNPs) and a zirconium-based metal–organic framework (UiO-66-NH 2 ). After that, Dithizone (DTZ) was immobilized onto the resulting Ag@UiO-66-NH 2 composite to form stable Raman-active complexes. In the presence of Hg 2+ , the strong chelation between DTZ and Hg 2+ induces distinct SERS signal changes, enabling highly sensitive and selective detection of Hg 2+ . A key advantage of this sensor is the ability to directly load microliter-scale samples into a pretreated capillary for on-site analysis using a portable Raman spectrometer. The sensor exhibits a linear response between the DTZ signal intensity and Hg 2+ concentration over a broad range (10 −12 –10 −5 mol·L −1 ), with excellent linearity (R 2 = 0.9900), uniformity, reproducibility, and selectivity against common interfering ions. This method was validated in environmental water samples, demonstrating good agreement with ICP-MS while simplifying sample handling and minimizing pretreatment. These findings underscore the sensor's considerable potential for practical, on-site monitoring of Hg 2+ in both environmental and industrial contexts.
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产品关联
DOI
高影响因子
Journal of Materials Chemistry B
·
2024
·
IF 6.1
Jing-Yi Shi,Bin Wang,Xin-Yue Cui,Xiao-Wei Hu,Hai-Liang Zhu,Yu-Shun Yang
In this work, a post-synthetic modification strategy was attempted to improve the performance of the probe for sulfite detection. The assembled platform UiO-66-NH-DQA, which was acquired by anchoring the sulfite-response fluorescent probe DQA onto the surface of UiO-66-NH2 via amide covalent bonds, exhibited enhanced fluorescence intensity and practical intracellular imaging capability. In spite of the structural similarity, as verified by characterization tests, the conversion rate of post-synthetic modification was calculated as 35%, equaling an approximate assembly ratio of 1 : 2 between UiO-66-NH2 and DQA. Most significantly, conversion into UiO-66-NH-DQA led to a 5.6-fold enhancement in the reporting signal with a red shift of 20 nm. For sulfite detection, the linear range was 0–150 μM, with a limit of detection value of 0.025 μM. UiO-66-NH-DQA retained advantages including high stability (within pH 5.0–9.0), rapid response (within 15 min) and high selectivity. Based on low cytotoxicity and relatively rapid cellular uptake, UiO-66-NH-DQA achieved the imaging of both the exogenous and endogenous sulfite levels in living cells. In particular, its rapid cell-permeating capability was guaranteed during the modification. The post-synthetic modification strategy reported herein has potential for improving the practical properties of fluorescent monitoring materials.
研究领域:
分析化学
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材料科学
·
生物医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
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.
研究领域:
材料科学
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电化学
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能源技术
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纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Ruirui Jin,Jingling Gong,Zhaoyang Li,Bin Xiang,Weimin Liu,Jian Li
The increase in oily wastewater exacerbates global water scarcity, triggering ecological damage and health risks. Although membrane separation technology was widely adopted in oily wastewater treatment due to its high efficiency and energy savings, membrane fouling issues lead to flux decline, increased energy consumption, and reduced membrane lifespan, thereby limiting its application. Therefore, this study proposed an advanced “water absorption-storage” strategy by in-situ growing UiO-66-NH₂ nanoparticles on attapulgite (APT) through carefully designed micro-nano-scale rough structures and chemical interactions, forming a unique biomimetic “corn-like” structure. The APT@UiO-66-NH₂/PEG composite membrane prepared in this study establishes a robust hydration barrier through synergistic interactions between its components, thereby exhibiting both outstanding anti-oil fouling capability and highly efficient, stable oil-water emulsion separation performance. Meanwhile, the in-situ growth of UiO-66-NH₂ on APT effectively resolved the issue of easy detachment between APT and UiO-66-NH₂. Moreover, the abundant hydrophilic functional groups (–OH) in polyethylene glycol (PEG) form hydrogen bonds with UiO-66-NH₂ and APT, further enhancing the structural stability. The obtained APT@UiO-66-NH₂/PEG composite membrane achieved separation efficiencies exceeding 99.8 % for various oil-in-water emulsions, with a separation flux reaching 3020 LMH/bar. After 10 separation cycles and 60 min of continuous operation, the separation performance remained essentially stable. The composite membrane demonstrated excellent chemical durability and mechanical stability in high-concentration acid, alkali, and salt solutions, as well as during bending and abrasion tests. Therefore, this study presents a simple and effective purification solution for practical oily wastewater, with the associated strategies and preparation techniques demonstrating broad application prospects.
研究领域:
环境科学技术
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膜科学
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材料化学
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纳米复合材料
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水处理
✓ 已验证
产品关联
DOI
高影响因子
POLYMER BULLETIN
·
2026
·Vol. 83
·期 10
·549
·
IF 4.2
Du Jiajie,Chen Sixian,Ding Rui,Wang Yingpeng,Shi Qisong
Traditional rigid sensors often lack sufficient flexibility, while pure poly(vinylidene fluoride) (PVDF) piezoelectric materials suffer from limited β-phase content and suboptimal mechanical properties. To address these challenges, we synthesized WO₃@UiO-66-NH₂ heterojunction materials via a hydrothermal method and integrated them with electrospinning technology to fabricate flexible TPU/PVDF composite piezoelectric sensor films. Characterization and performance evaluation identified an optimal PVDF-to-TPU mass ratio of 8:2. Moreover, incorporation of 0.5 wt% WO₃@UiO-66-NH₂ yielded the highest β-phase content in PVDF, along with enhanced dielectric properties, energy storage density, and piezoelectric output. The resulting flexible piezoelectric sensor demonstrates a sensitivity of 1.87 V/N, with response and recovery times of 40 ms and 140 ms, respectively. It reliably monitors diverse human activities and physiological signals, including wrist and knee joint flexion, vocalization, swallowing, respiration, and grasping. Combining excellent flexibility, high sensitivity, and rapid response, this sensor shows considerable promise for applications in human health monitoring and motion detection.
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）