ANALYTICA CHIMICA ACTA
·
2023
·
IF 6.2
Ya Zhang,Ying Xu,Yi Ma,Huibo Luo,Jingzhou Hou,Changjun Hou,Danqun Huo
Using an assemble-able MOF material, we successfully constructed an ultra-sensitive electrochemical sensor based on Bi 2 CuO 4 @Al-MOF@UiO-67 nanocomposite material, in order to investigate the adsorption properties of the Bi 2 CuO 4 @Al-MOF@UiO-67 functional material on the heavy metal ion . The Cd 2+ , Cu 2+ , Pb 2+ and Hg 2+ can be detected at the same time. Selective recognition and enrichment of various metal ions on different substrates can be achieved through the assembly of a large number of Al-MOF and UiO-67-MOF nanomaterial composites with small particle sizes on the Bi 2 CuO 4 surface. Based on this, a new type of sensor is researched and prepared, which has been shown to have good stability and reproducibility. Due to its unique assembly structure, large active surface area , excellent adsorption capacity, and high electrical conductivity , Bi 2 CuO 4 @Al-MOF@UiO-67 presents outstanding performance. In addition, the sensor also exhibits excellent electrocatalytic redox capacity and high selectivity . The adsorption capacity of Cd 2+ , Cu 2+ , Pb 2+ and Hg 2+ is also significantly improved under the action of the sensor electrode, however, this is not the case. The limits of detection for Cd 2+ , Cu 2+ , Pb 2+ and Hg 2+ were found to be 0.02 pM, 0.032 pM, 0.018 pM and 0.041 pM, respectively. In order to investigate the detection mechanism of Cd 2+ , Cu 2+ , Pb 2+ and Hg 2+ was adsorption properties as well as electrochemical accumulation of Bi 2 CuO 4 @Al-MOF@UiO-67 on the metal atoms were investigated. This method has been successfully applied to samples of rice, sorghum, maize, milk, honey, and tea, and has enabled the simultaneous detection of Cd 2+ , Cu 2+ , Pb 2+ and Hg 2+ , which is of significant practical value.
研究领域:
材料科学
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分析化学
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环境科学
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高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2026
·
IF 4.7
ShuHuan Chen,Panweiyi Wang,Teshale Ayano Begeno,Afaq Nazir,ZhenXia Du,Shuping Qu
Luminescent metal-organic frameworks (LMOFs) have emerged as promising materials for optical sensing, owing to their tunable luminescent properties. However, most existing LMOF-based sensors rely on single-wavelength fluorescence intensity changes, which suffer from poor resistance to environmental fluctuations due to the absence of auxiliary reference signals, limiting their accuracy, especially for trace ammonia(NH 3 ) below the human olfactory threshold, which evades sensory perception yet poses long-term risks. To address this limitation, UIO-67-x where x denotes the molar ratio of terephthalic acid (H 2 BDC) to biphenyl-4,4`-dicarboxylic acid (H 2 BPDC) was designed. By optimizing the ligand ratio, UIO-67-0.2 was synthesized with well-defined crystallinity, large specific surface area and high fluorescence emission peak intensity. Its regular structure enables efficient encapsulation of rhodamine B (RhB) forming the dual-emission [email protected] platform. This platform has two adjustable emission peaks, both of which respond sensitively and synchronously to ammonia, thereby strengthening signal reliability and anti-interference capability through dual-channel synergistic verification. Notably [email protected] achieves an ultra-low NH 3 limit of detection (LOD) of 0.2 ppm, far below the olfactory threshold, and maintains remarkable stability after 5 cycles with stable reusability. Combining experiments and Density functional theory (DFT) calculations the quenching mechanism is clarified as the synergistic effect of static quenching and charge transfer. A [email protected] drop-cast film exhibits naked-eye distinguishable color change at 2.5 ppm NH 3 under 365 nm Ultraviolet(UV) light. It remains unchanged with other volatile organic compounds (VOCs) and shows concentration-dependent color gradation for semi-quantitative assessment. Furthermore, Digital conversion of fluorescence color signals via ΔE analysis enabled truly quantitative ammonia detection with a linear calibration curve ( R 2 = 0.968), eliminating the subjectivity of naked-eye judgment. This work develops a dual-mode LMOF for sub-olfactory-threshold NH 3 detection and informs anti-interference dual-emission platform design enabling on-site low-cost monitoring.
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JOURNAL OF MEMBRANE SCIENCE
·
2026
·
IF 8.8
Miaolu He,Yiming Jin,Jie Lian,Yue Hu,Yaqiang Yuan,Yilin Yang,Lujie Nie,Jiajing Hao,Rui Miao,Jin Wang,Xudong Wang,Lei Wang
Forward osmosis (FO) has emerged as a promising technology for lithium resource recovery owing to its low energy consumption. However, conventional FO membranes, typically featuring thick separation layers and defect-prone porous structures, suffer from low lithium recovery rates and processing efficiency. Herein, a thermos-responsive UiO-67-PNIPAM composite was constructed as a functional interlayer to dynamically regulate aqueous-phase monomer transport during interfacial polymerization. By leveraging the temperature-responsive nature of PNIPAM and controlling the organic-phase temperature, a vertical temperature gradient was established within the interlayer due to uneven heat transfer. In the upper, warmer region, PNIPAM adopts a collapsed conformation with reduced amide accessibility, exhibiting weak interaction with m-phenylenediamine, thereby enabling rapid monomer release. In the lower, cooler region, extended PNIPAM chains, with amide groups fully exposed, enhance interactions with m-phenylenediamine and hinder its diffusion to the reaction interface. This synergistic regulation promoted a self-terminating IP process, culminating in an ultrathin and dense separation layer. Furthermore, elevated temperature facilitated the escape of dissolved gases from both phases, leading to the formation of pronounced ridge-and-valley structures on the separation layer. This morphology increased the effective water permeation area and water storage capacity. As a result, the UiO-67-PNIPAM interlayer membrane achieved a water flux of 28.30 L m −2 h −1 in FO mode, representing a 100.28% improvement over the conventional membrane. Its reverse salt flux was significantly reduced to 1.44 g m −2 h −1 , a decrease of 47.26%. In lithium recovery tests, the membrane exhibited a high lithium recovery rate, demonstrating its strong potential for efficient lithium extraction.
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APPLIED ORGANOMETALLIC CHEMISTRY
·
2026
·Vol. 40
·期 5
·e70579
·
IF 4.3
Changqing Xia,Zhengshen Bao,Dehong Xu,Shixing Wang,Weili Li
A robust metal–organic framework (MOF) material, UIO67-PS, was synthesized by grafting sulfonic acid groups onto the UIO67-NH 2 framework. This modification significantly enhances the electronegativity and coordination-site density on the MOF surface, enabling threefold higher Au (III) adsorption capacity (536.4 mg/g at pH 2.0 temperature 25°C and agitation speed 120 rpm) compared to pristine UIO67-NH 2 (168.4 mg/g). The material exhibits exceptional acid resistance and recyclability (91% capacity retention after three cycles). Density functional theory (DFT) calculations and X-ray photoelectron spectroscopy (XPS) analyses reveal that the adsorption mechanism is governed by synergistic electrostatic interactions and chelation, wherein electron-rich oxygen/nitrogen-containing functional groups on the adsorbent surface coordinate with metal ions via covalent bonds to form stable five-membered ring complexes. Kinetic studies confirm rapid adsorption equilibrium (< 240 min), while thermodynamic analysis indicates an endothermic, entropy-driven process. Notably, UIO67-PS demonstrates superior selectivity for Au (III) over competing ions (e.g., Zn 2+ and Cu 2+ ) in simulated e-waste leachates. Achieving removal rates as high as 80% in real metallurgical wastewater highlights its potential for practical application. This work reveals key coordination interactions, including complexation and electrostatic attraction, within a simulated e-waste leachate system containing competing ions such as copper and nickel. These insights advance the design strategies of MOFs for sustainable Au (III) recovery and provide a scalable platform for industrial wastewater treatment, contributing to environmental protection and the sustainable utilization of critical material resources.
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APPLIED ORGANOMETALLIC CHEMISTRY
·
2024
·
IF 3.7
Yan Gao,Shumin Zhao,Jingwen Huang,Tao Han,Jianshe Zhao
Venturello-structured polyoxometalates (POMs) are effective homogeneous catalysts and confining POMs to size-matched metal-organic frameworks (MOFs) as heterogeneous catalyst is an effective way to improve their practical application. The appropriate pore and narrow window of pristine UiO-67 can not only enclose POMs in single molecule but also limit their leaching and can provide a suitable platform for the oxidation of most sulfur-containing organic compound. The composite (CTA) 3 PW 4 @UiO-67 was prepared by a facile in situ synthesis method, characterized by a variety of means and tested for desulfurization of multicomponent simulated diesel. The results prove that the active component (CTA) 3 PW 4 is effectively encapsulated, and the composite (CTA) 3 PW 4 @UiO-67 show remarkable desulfurization activity and excellent reusability. In addition, the kinetics and possible mechanism of the reaction were investigated. This work opens up a new idea for the design of “host-guest adapted” catalyst suitable for fuel desulfurization technology.
研究领域:
化学工程
·
催化科学
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高影响因子
FOOD CHEMISTRY
·
2026
·
IF 10.4
Xueqin Sun,Yan Fan,Jiacheng Liu
A novel of ratiometric fluorescence sensor Eu 3+ @UiO-67-TFSA with pre-concentration effect was fabricated by PSM. • The prepared Eu 3+ @UiO-67-TFSA exhibited high selectivity and sensitivity toward OFL. • The possible sensing mechanism of Eu 3+ @UiO-67-TFSA for OFL was systematically studied. • The Eu 3+ @UiO-67-TFSA paper sensor with smartphone allowed on-site visual rapid OFL detection. The excessive use of ofloxacin (OFL) has led to its persistent residues in water sources and animal-derived foods, posing a threat to human health. Therefore, it is urgent to develop fluorescent sensing materials capable of detecting ofloxacin in water environments and food matrices. Herein, a novel Eu 3+ @tetrafluorosuccinic acid-functionalized ratiometric fluorescent material Eu 3+ @UiO-67-TFSA was prepared by a two-step post-synthetic modification of UiO-67. In the concentration range of 1–15 μM, the Eu 3+ @UiO-67-TFSA had a limit of detection (LOD) of 0.42 μM for OFL, which was approximately 3.90 times lower than that of the non-fluorinated Eu 3+ @UiO-67-SA (LOD = 1.64 μM). The improved sensing performance could be attributed to the pre-concentration effect provided by the Eu 3+ @UiO-67-TFSA. The possible detection mechanism was systematically elucidated through relevant experiments and density functional theory (DFT) calculation. Moreover, the constructed smartphone-assisted visual sensing platform was successfully applied to detect OFL in actual food samples and real water environment samples. A novel ratiometric fluorescent sensor Eu 3+ @UiO-67-TFSA was synthesized through two-step PSM. The preparation of Eu 3+ @UiO-67-TFSA enabled effective detection of OFL via ratiometic fluorescence signals, with a detection limit as low as 0.42 μM, which was approximately 3.90 times lower than that of the non-fluorinated Eu 3+ @UiO-67-SA. The improved sensing performance could be attributed to the pre-concentration effect provided by the as-obtained Eu 3+ @UiO-67-TFSA. Furthermore, the fluorescent test strips based on Eu 3+ @UiO-67-SA was combined with smartphone to realized on-site, visual and rapid detection of OFL. Download: Download high-res image (286KB) Download: Download full-size image
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ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Yuhao Liu,Xuyi Wang,Liping Chen,Ming Cheng,Hua Wang,Jiaojiao Shang,Dan Zheng,Beibo Zhang,Jianwu Lan,Shaojian Lin
Heavy metal contamination in water poses a serious global environmental challenge. In particular, hexavalent chromium (Cr (VI)) is particularly concerning due to its carcinogenicity and genotoxicity. In this work, core–shell NH2–UiO-66@UiO-67 nanoparticles (NPs) were in situ stepwise grown on sulfonated polypropylene (PP) nonwoven to fabricate a multifunctional composite (NH2–UiO-66@UiO-67/PP composite nonwoven) for efficient removal of Cr (VI). As expected, the resulting NH2–UiO-66@UiO-67/PP composite nonwoven exhibited dual functionality for efficient Cr (VI) remediation: simultaneous adsorption and visible-light-driven photocatalytic reduction, accompanied by effective sequestration of the resulting Cr (III), due to the presence of NH2–UiO-66@UiO-67 NPs. Under visible light irradiation, the composite achieved exceptional performance, reducing Cr (VI) concentrations from 0.608 mg/L to below 0.004 mg/L and lowering total Cr concentrations from 0.876 mg/L to below 0.004 mg/L, corresponding to a removal efficiency of over 99.6%. The mechanism was elucidated as an integrated adsorption-reduction-fixation process. More importantly, the composite demonstrated outstanding recyclability, retaining 80.0% of its removal efficiency after five regeneration cycles, highlighting its practical potential. Therefore, the as-obtained NH2–UiO-66@UiO-67/PP composite nonwoven can be viewed as a highly efficient material for treating Cr (VI)-contaminated wastewater through an adsorption-photocatalytic reduction pathway.
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高影响因子
MICROCHIMICA ACTA
·
2020
·Vol. 187
·期 2
·1-7
·
IF 6.232
Zhang Xiaoxiong,Zhang Wenjun,Li Gang,Liu Qianqian,Xu Yinsheng,Liu Xin
Terbium(III)-functionalized zirconium-based MOFs (Tb 3+ @UIO-67) were synthesized by doping Tb 3+ into UIO-67 using a post-synthetic modification. The Tb 3+ @UIO-67 (solid or aqueous dispersion) shows only blue fluorescence (emission peaks at 420 nm) under an ultraviolet lamp (254 nm). Upon addition of 2,6-pyridinedicarboxylic acid (DPA; an anthrax biomarker), the color of the Tb 3+ @UIO-67 aqueous dispersion under an ultraviolet lamp changes from blue to green. This is mainly because DPA has a good sensitization effect on Tb 3+ . DPA can be determined by measurement of the ratio of the fluorescence intensities at 544 nm and 420 nm (excitation at 278 nm). The method allows DPA to be detected in the 0.3 to 6 μM concentration range, with a detection limit of 36 nM.
Schematic representation of a ratiometric fluorescent probe synthesized by doping terbium ions into a zirconium-based MOF (UIO-67) for determination of an anthrax biomarker.
研究领域:
生物化学
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材料科学
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分析化学
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高影响因子
ANALYTICAL CHEMISTRY
·
2021
·
IF 6.986
Xinyang Zhu,Huanhuan Xing,Yuan Xue,Jing Li,Erkang Wang,Shaojun Dong
A chemical fixation strategy originating from single-atom-anchoring with metal–organic frameworks as a carrying matrix was proposed for solid-state electrochemiluminescence (ECL). Herein, UiO-67(N) with the exposure of 2,2′-bipyridine (bpy) ligands could coordinate with Ru2+ to form a local structure of [Ru(bpy)3]2+ (Ru-UiO). The influence of the steric effect induced with different Ru sources was discussed. The as-obtained Ru-UiO exhibits high ECL intensity and outstanding stability in the presence of a coreactant at low concentrations. The proposed synthesis strategy may hold great potential for the synthesis of solid-state ECL materials and their further utilization in ECL analysis.
研究领域:
材料科学
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分析化学
·
电化学
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高影响因子
INORGANIC CHEMISTRY
·
2024
·
IF 4.3
Guangtao Zhang,Ran Chong,Xiaoyuan Zhou,Junpu Yang,Yaoyao Bai,Zhi-Hui Zhang,Jian Lin
Porous metal–organic frameworks (MOFs) have shown great potential as adsorbents for capturing radioiodine, a major fission product generated during the reprocessing of nuclear fuel. However, studies exploring the correlation between the structure of MOFs and iodine uptake capacity remain notably rare. In this study, we introduce a new strategy for enhancing the iodine adsorption efficiency of MOFs by strategically varying the position of functional groups on the organic linkers. Employing ligand-functionalized UiO-67 MOFs, our findings reveal that ortho-amino substitution of UiO-67-o-NH2, proximal to the node of the dicarboxylate linker, markedly accelerates adsorption kinetics of iodine vapor in comparison to meta-amino substitution of UiO-67-m-NH2, where the amino groups are oriented away from the node. In contrast, UiO-67-m-NH2 exhibits a higher adsorption capacity of 2.19 g/g, compared to 1.91 g/g for UiO-67-o-NH2, attributable to its higher porosity. Furthermore, a competitive I2/H2O vapor adsorption study demonstrated that UiO-67-o-NH2 exhibits faster adsorption kinetics and higher selectivity for iodine in the presence of water vapor compared to UiO-67-m-NH2. Additionally, the crucial influence of positional isomerism on enhancing iodine adsorption has been corroborated through Raman spectroscopy, X-ray photoelectron spectroscopy, and density functional theory calculations. These analyses reveal that the nitrogen atom positioned at the ortho site demonstrates a stronger affinity for iodine molecules compared to the nitrogen atom at the meta site, thereby improving adsorption kinetics.
研究领域:
材料科学
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核化学
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环境科学
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高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2018
·
IF 6.653
Chen Tian,Jian Zhao,Xinwen Ou,Jieting Wan,Yuepeng Cai,Zhang Lin,Zhi Dang,Baoshan Xing
p-Arsanilic acid (p-ASA) is an emerging organoarsenic pollutant comprising both inorganic and organic moieties. For the efficient removal of p-ASA, adsorbents with high adsorption affinity are urgently needed. Herein, amine-modified UiO-67 (UiO-67-NH2) metal–organic frameworks (MOFs) were synthesized, and their adsorption affinities toward p-ASA were 2 times higher than that of the pristine UiO-67. Extended X-ray absorption fine structure (EXAFS), X-ray photoelectron spectroscopy (XPS), and density functional theory (DFT) calculation results revealed adsorption through a combination of As–O–Zr coordination, hydrogen bonding, and π–π stacking, among which As–O–Zr coordination was the dominant force. Amine groups played a significant role in enhancing the adsorption affinity through strengthening the As–O–Zr coordination and π–π stacking, as well as forming new adsorption sites via hydrogen bonding. UiO-67-NH2s could remove p-ASA at low concentrations (<5 mg L–1) in simulated natural and wastewaters to an arsenic level lower than that of the drinking water standard of World Health Organization (WHO) and the surface water standard of China, respectively. This work provided an emerging and promising method to increase the adsorption affinity of MOFs toward pollutants containing both organic and inorganic moieties, via modifying functional groups based on the pollutant structure to achieve synergistic adsorption effect.
研究领域:
环境科学
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材料化学
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吸附技术
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水污染控制
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理论化学
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X射线光谱学
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DOI
高影响因子
BIOSENSORS & BIOELECTRONICS
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2021
·
IF 10.618
Yingwen Wang,Dun Zhang,Yan Zeng,Peng Qi
Simultaneous multiple-target detection is essential for the prevention, identification, and treatment of numerous diseases. In this study, a novel strategy based on target-modulated competitive binding and exonuclease I (Exo I)-powered signal molecule release was established with the advantages of rapid response and high selectivity and sensitivity. The strategy holds substantial potential for the development of versatile platforms for the simultaneous detection of biological targets. To mitigate the low load capacity and time-consuming responsive process of the Zr-MOF system, UiO-67 was chosen to replace UiO-66 (a typical Zr-MOF) as the nanocarrier for encapsulating more signal molecules, whereby the assembled double-stranded DNA (dsDNA) structures of UiO-67 acted as gatekeepers to form dsDNA-functionalized MOFs. Additionally, Exo I was introduced into the system to accelerate the release of the signal molecules. In the presence of biological targets, the competitive binding between the targets and aptamers caused the hydrolysis of the free DNA sequence by Exo I, promoting the release of signal molecules and leading to a rapid and significant increase in the fluorescence intensity . For adenosine triphosphate (ATP) and cytochrome c (cyt c ), which were chosen as model biological targets, this sensor displayed detection limits as low as 5.03 and 6.11 fM, respectively. Moreover, the developed biosensor was successfully applied to the simultaneous detection of ATP and cyt c in spiked serum samples. Therefore, this strategy provides guidance for further research of biosensors for simultaneous multiple-target detection and propels the application of MOF carriers in biomedicine.
研究领域:
生物传感
·
纳米技术
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分析化学
·
生物医学工程
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高影响因子
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