SEPARATION AND PURIFICATION TECHNOLOGY
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2020
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IF 5.774
Rui Ou,Wenjian Zhu,Lulu Li,Xuyu Wang,Qian Wang,Qiang Gao,Aihua Yuan,Jianming Pan,Fu Yang
The great challenge in capturing harmful volatile organic compounds (VOCs) using Metal-Organic-Frameworks (MOFs) materials still rely on rationally modifying its appreciable microporous character in hydrostable structure. Defected structure in MOFs might be very beneficial for creating expected engineering adsorbent. In this study, defect-engineering UiO-66 via imparting acetic acid (HAc) as an interfering agent was successfully fabricated by a simple hydrothermal method. The physicochemical properties of the obtained materials were intensively ascertained and identified through a series of applicable characterizations. By the proper participation of tuning concentration of HAc (HAc/TAc = 24, molar ratio), the obtained adsorbent UiO-66–1.0HAc was endowed with the highest adsorption capacity for benzene (367.13 mg g −1 , 25 °C) in the known UiO-66 materials, which was 41.9% higher than that of the non-defected UiO-66. With a higher optimized added amount of HAc (HAc/TAc = 48, molar ratio), the adsorption capacity of UiO-66–2.0HAc to toluene achieved the highest capture values (410.21 mg g −1 , 25 °C), which boosted 93% compared with the original counterpart. This demonstrated improvement was ascribable to the imparted structural defect-engineering derived from the missing-linkers of MOFs increasing the unsaturated adsorption site and concomitant enlarged structural properties of the resultant material. By identifying the DIH (Difference in adsorption heat), the obtained maximum adsorption selectivity of UiO-66–1.0HAc to toluene/water was further enhanced to 64.4, which was 3.7 times the original UiO-66, owing to the existed defect-engineering in adsorbents, indicating the potential differential competitive adsorption effect for benzene and toluene under humid conditions.
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2019
·
IF 7.015
Jiaqi Wang,Yuqing Zhang,Ying Wang,Shuai Sun
To efficiently clean oily wastewater with the linear anion polyacrylamide (APAM), selective adsorption strategy belonging to phase equilibrium separation is introduced into the membrane separation . Herein, bimetallic Ce-UiO-66-NH 2 /diatomite (CUD) were first synthesized by a one-step hydrothermal method and then employed as a functional layer to form CUD self-assembled membrane (CSA-membrane). CUD particles were characterized by FT-IR, XRD and SEM, and CSA-membrane was observed by SEM. The separation and the selective adsorption properties of CSA-membrane formed under the optimum conditions for APAM in oily wastewater were investigated. The results demonstrate that the size of CUD particles with proper sphericity is mainly 20 μm. Furthermore, CSA-membrane simultaneously exhibits fascinating separation and selective adsorption properties for cleaning oily wastewater, namely the concentration of oil decreases from 78.1 mg L -1 to 6.8 mg L -1 , and flux of CSA-membrane reaches 789.5 L m -2 h -1 . Remarkably, the adsorption capacity of CSA-membrane for APAM is 161.5 mg g -1 , while showing the APAM removal rate of 51.3%. Therefore, CSA-membrane with the synergetic effect of phase equilibrium and rate separation is promising alternative for cleaning oily wastewater with APAM.
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高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2022
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IF 14.224
Zhikun Huang,Haojie Yu,Li Wang,Xiaowei Liu,Shuning Ren,Jinyi Liu
Designing graphitic carbon nitride (CN) based heterostructured photocatalysts with high catalytic activity is highly desired for peroxymonosulfate (PMS) activation to degrade organic pollutants from water. Herein, a novel heterostructured composite (U-F@CN) consisting of ferrocene-modified Uio-66-NH 2 (U-F) and CN was synthesized. The U-F@CN exhibited superior photocatalytic performance to degrade bisphenol A (BPA) in the presence of PMS under visible light. The experimental results indicated that BPA could be removed entirely by U-F@CN within 60 min under visible light irradiation. In addition, the outstanding photocatalytic activity could be maintained at high level in a wide pH range, appropriate temperature region and natural water condition. Benefiting from the good chemical stability, outstanding optical property and in-situ generation of interfacial heterojunction of U-F@CN, the interfacial transport of photogenerated charges could follow the Z-scheme mechanism, which can accelerate the charge separation and transport to yield abundant reactive active species (ROS) to efficiently active PMS and under visible light. This work provides a novel approach to design CN-based heterostructured photocatalysts with high stability and superior photocatalytic activity for environmental remediation.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
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IF 3.779
Chao Wang,Yao Xue,Peifang Wang,Yanhui Ao
It is necessary to find visible light responsive photocatalysts for rapid and simple degradation of organic pollutants in water environment. In this work, a visible light responsive composite photocatalyst AgI/UiO-66 was prepared by an in situ growth method. Sulfamethoxazole (SMZ) antibiotic was selected as the target contaminant to probe the photocatalytic performance of the as-prepared AgI/UiO-66 composite under visible light irradiation. The results showed that the photocatalytic performance of the AgI/UiO-66 composite enhanced significantly compared to pure AgI. The effects of typical environment factors (i.e. pH, inorganic salt ions and common anions) on the degradation of SMZ were evaluated extensively. Results showed that the investigated pH (5.2, 7.0, 9.5) had no apparent effect on the photocatalytic degradation of SMZ except pH 2.5, at which the degradation rate of SMZ decreased significantly. In addition, inorganic salt ions and Cl − , HCO 3 − and SO 4 2− anions in water exhibited no apparent effect on the degradation of SMZ. The effect of water matrix on the degradation of SMZ was also investigated. In the river water, the removal efficiency of SMZ was reduced compared with the cleaner water matrix. The capture experiments of radicals confirmed that superoxide radicals ( O 2 − ) and hydroxyl radicals ( OH) were the main active species for the photocatalytic degradation of SMZ in the present work. Finally, the tentative degradation pathways of SMZ were proposed based on the intermediates analysis.
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高影响因子
COMPOSITES PART B-ENGINEERING
·
2019
·
IF 6.864
Wenwen Guo,Shibin Nie,Ehsan Naderi Kalali,Xin Wang,Wei Wang,Wei Cai,Lei Song,Yuan Hu
The SiO 2 @metal organic framework (Universitetet i Oslo-66, UiO-66) core–shell microspheres were constructed through covalent linkage between amine groups in UiO-66-NH 2 and epoxy groups on the surface of silica . The morphology and size of the SiO 2 @UiO-66 core–shell microspheres could be simply controlled by tuning the ratio between UiO-66-NH 2 and epoxy terminated silica (E-SiO 2 ). As observed by TEM , the SiO 2 @UiO-66 hybrids showed better dispersion state within epoxy matrix compared to either E-SiO 2 or UiO-66-NH 2 . The incorporation of SiO 2 @UiO-66 hybrids slightly promoted the thermal degradation of the resultant epoxy composites but improved residual yield. The dynamic mechanical analysis results indicated that the SiO 2 @UiO-66 hybrids slightly increased the glass transition temperature and the modulus. The SiO 2 @UiO-66 hybrids exhibited higher efficiency in reducing the heat release rate and the smoke production rate compared to either E-SiO 2 or UiO-66-NH 2 . The influence of the component ratio in SiO 2 @UiO-66 on flame retardancy of the epoxy composites was also studied by cone calorimeter . Specifically, the SiO 2 @UiO-66 hybrid with medium ratio (SiO 2 @UiO-66-2) exhibited maximum reduction in peak heat release rate (−31%), total heat release (−23%) and total smoke production (−16%). The char residues were investigated by the Fourier transform infrared spectra, scanning electron microscopy and X-ray photoelectron spectroscopy, which demonstrated that the enhanced flame retardancy of EP/SiO 2 @UiO-66-2 was attributable to the continual morphology and high thermal resistance originated from the presence of the silicon and zirconium complex. These favorable characteristics including high flame retardant efficiency and good smoke suppression make SiO 2 @UiO-66 hybrids promising for flame retardant polymers application .
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高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2022
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IF 4.326
Longsheng Pei,Hanlun Yang,Shouhui Chen,Li Wang
The metal–organic framework (MOF) UiO-66-NH2 was synthesized and attached to kenaf stem-derived three-dimensional macroporous carbon (3D-KSC) simultaneously, and then, the isothiocyanate functional group was introduced into UiO-66-NH2 MOFs to prepare UiO-66-NHC(S)NHMe/3D-KSC nanocomposites. The amount of UiO-66-NHC(S)NHMe MOFs on 3D-KSC can be controlled easily by the monomer concentration. There were three adsorption sites (two nitrogen atoms and one sulfur atom) on each structural unit of UiO-66-NHC(S)NHMe for adsorption toward heavy metal ions (HMIs) and well-regulated pores and 3D macropores of 3D-KSC to promote the transfer of HMIs. Therefore, UiO-66-NHC(S)NHMe/3D-KSC nanocomposites can be applied for the removal and electrochemical detection of Cd2+, Pb2+, Cu2+, and Hg2+. The detection limits of Cd2+, Pb2+, Cu2+, and Hg2+ were 0.0125, 0.0124, 0.0111, and 0.0094 μM, respectively. The sensitivities were 879.1, 887.6, 992.5, and 1160.7 μA μM–1 cm–2, respectively. UiO-66-NHC(S)NHMe/3D-KSC showed fine reproducibility and stability as well as strong anti-interference ability. In addition, the HMIs can be removed effectively by UiO-66-NHC(S)NHMe/3D-KSC with the maximum adsorption capacity of 88, 391, 223, and 935 mg·g–1 for Cd2+, Pb2+, Cu2+, and Hg2+, respectively. The results show that UiO-66-NHC(S)NHMe/3D-KSC has great potential for the adsorption and detection of HMIs.
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高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2025
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IF 5.4
Yao Lei,Chengli Xie,Tong Xu,Min Wang,Lianzhe Hu,Zhining Xia
Nanozymes have attracted increasing attention in sensors owing to their capacity for catalytically converting substrates into colored or luminescent products. However, the lack of sensing selectivity limits their practical use. Herein, a ligand engineering strategy was proposed to improve the selectivity of UiO-66 nanozyme. Upon the perfluorination of bridging ligands, the resulting UiO-66-F 4 nanozyme exhibited higher phosphatase-like catalytic activity than the pristine UiO-66. More importantly, UiO-66-F 4 exhibited a remarkable specificity towards Al 3+ , which was ascribed to the specific coordination interaction of Al 3+ with F groups and oxygen-containing groups of UiO-66-F 4 . After incubation with Al 3+ , the aggregation of UiO-66-F 4 nanosheets occurred, which further results in the significant decrease in its catalytic activity. Base on this finding, a colorimetric method for selective detection of Al 3+ was proposed. The linear range is 2–30 μM with a detection limit as low as 0.27 μM. In addition, as an adsorbent for Al 3+ , UiO-66-F 4 also exhibited excellent adsorption performance with a capacity of 27.04 mg/g.
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高影响因子
MICROCHIMICA ACTA
·
2025
·Vol. 192
·期 7
·1-10
·
IF 5.3
Chen Fei,Wang Xiang,Yan Lei,Lin Zhixiong,Zheng Weijun,Wu Dianming,Qiu Bin,Fang Yifan,Liu Mingkun
By preparing gold nanoparticles-graphdiyne (Au-GDY) as sensing substrate and [Ru(NH 3 ) 6 ] 3+ -UiO-66-NH 2 MOFs (Ru-UiO-66) as signaling probe as well as linking the as-prepared Au-GDY and Ru-UiO-66 with the specific peptide (PT) of MMP-7 to form Ru-UiO-66/PT/Au-GDY, a cost-effective and sensitive electrochemical sensor was designed for the detection of matrix metalloproteinase-7 (MMP-7) which is an important biomarker for tumor and biliary atresia. The superior electrical properties, easy preparation, large surface area, and high stability of Au-GDY make it be a desirable substrate to immobilize PT. The unique structure of UiO-66-NH 2 is beneficial to assemble [Ru(NH 3 ) 6 ] 3+ probe and link PT. In the absence of MMP-7, the Ru-UiO-66/PT/Au-GDY modified electrode exhibited a prominent peak current of [Ru(NH 3 ) 6 ] 3+ , which is decreased after the addition of target MMP-7 since it can specifically recognize and cleave PT to induce the Ru-UiO-66 leave the electrode. The experimental results showed that the decrease of the [Ru(NH 3 ) 6 ] 3+ signal has a linear relation with the concentrations of MMP-7 in the range 0.01 pg mL −1 –10.0 ng mL −1 . By optimizing experimental conditions, the achieved detection limit (LOD) for MMP-7 is 5.0 fg mL −1 . The analysis of real serum samples has excellent accuracy. The simplicity of preparation and sensitivity make the Ru-UiO-66/PT/Au-GDY sensor a considerable promising analysis tool for MMP-7 detection. Graphical abstract
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PubMed
高影响因子
LWT-FOOD SCIENCE AND TECHNOLOGY
·
2025
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IF 6.6
Jianmei Li,Yuting Yin,Haiyu Li,Zongyao Zhao,Mengqin Xiang,Yong Tang,Qi Sun
The escalating economic and ethical concerns associated with camel meat adulteration using cheaper horsemeat necessitate the development of rapid, on-site detection technologies that overcome the limitations of conventional laboratory-based methods. In this study, a portable electrochemical DNA biosensor was fabricated by integrating a polydopamine (PDA)-modified screen-printed carbon electrode (SPCE) with a nucleic acid-functionalized UIO-66(Zr) metal-organic framework (MOF). The PDA coating facilitated stable, covalent immobilization of DNA capture probes through Schiff base reactions, while the UIO-66(Zr) MOF functioned as a high-capacity signal amplifier owing to its large surface area and intrinsic redox activity. This synergistic architecture enabled ultrasensitive detection, achieving a limit of 3.57 pmol/L for horsemeat DNA and 0.5 g/kg adulteration in camel meat blends—significantly surpassing the performance of existing detection methods. The biosensor exhibited excellent specificity by distinguishing single-base mismatches, along with high reproducibility (RSD = 4.12%), operational stability over 15 days, and accurate recovery rates ranging from 91.7% to 112.4% in spiked samples. Its disposable electrode format, cost-effectiveness, and compatibility with portable potentiostats underscore its strong potential for on-site meat authentication. Overall, this work provides a practical and scalable solution to combat meat fraud in resource-limited settings and establishes a versatile MOF-electrode nanoassembly platform for advanced food safety monitoring.
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高影响因子
ANALYTICA CHIMICA ACTA
·
2025
·
IF 6
Zifei Wu,Hao Ding,Kailai Xu,Chenghui Li,Xiandeng Hou
Background due to the toxicity and widespread distribution of inorganic mercury ions (Hg 2+ ), it is a crucial task for researchers to develop simple methods for field analysis of water samples for trace Hg 2+ . Result a colorimetric and ratiometric fluorescent dual-mode assay based on bifunctional UiO–(COOH) 2 –NH 2 /Eu and gold nanocomplexes (AuNPs@UiO–(COOH) 2 –NH 2 /Eu) was constructed for the sensitive, selective and potentially on-site determination of Hg 2+ . The incorporation of Hg 2+ resulted in the formation of gold amalgam, which enhanced peroxidase-like activity of AuNPs@UiO–(COOH) 2 –NH 2 /Eu, accelerating the oxidization of zymolyte 3,3′,5,5′-tetramethylbenzidine (TMB). Concurrently, the color of the reaction solution turned blue, and the RGB (red, green, and blue) of the solution color changed accordingly. The fluorescence at 618 nm was almost unchanged with the increase of Hg 2+ concentration, whereas the fluorescence at 460 nm was obviously quenched due to the inner filter effect (IFE). Under UV irradiation, the fluorescence emission of the sensing system changed from blue to red, enabling easy visual detection. The probe showed great linearity over a wide range of 20–1200 nM (colorimetric) and 50–4000 nM (fluorescent), with limits of detection (LODs) of 8 nM and 3 nM, respectively. Significance the proposed method was successfully applied to the determination of trace Hg 2+ in tap water and groundwater, while the use of a smartphone enables its simplicity and portability. The results show that the colorimetric and ratiometric fluorescent dual-mode method based on AuNPs@UiO–(COOH) 2 –NH 2 /Eu can achieve rapid visual determination of Hg 2+ potentially useful for on-site analysis.
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PubMed
高影响因子
ChemistrySelect
·
2025
·Vol. 10
·期 11
·e202405440
·
IF 2
Chenxiao Pei,Nan Wang,Yuqi Zhang,Yuhang Zhong,Xingang Liu,Jianyuan Hou,Yuan Yuan,Renxi Zhang
Graphical A novel UIO-66/Pebax® 1657 mixed matrix membrane is developed via air plasma modification, significantly enhancing CO₂ separation performance. The plasma treatment introduces ─NH₂ groups and active sites, improving interfacial compatibility and CO₂ adsorption. The membrane achieves a CO₂ permeability of 453 Barrer and CO₂/N₂ selectivity of 37.8 demonstrating superior gas separation efficiency and stability. This paper synthesized a new mixed matrix membrane for CO 2 separation. First, the metal-organic framework UIO-66 was treated with air plasma for modification and then embedded in Pebax® 1657. The 10% UIO-66/Pebax® 1657 mixed matrix membranes treated with air plasma significantly improved interfacial compatibility and CO 2 adsorption capacity, showing excellent performance. Its permeability reached 453 Barrer as CO 2 and the selectivity was 37.8 as CO 2 /N 2 . It was confirmed by characterization techniques such as FTIR, XRD, XPS, TGA, NMR, and SEM that the plasma successfully introduced ─NH 2 groups and active sites on the UIO-66 surface, thereby significantly improving the interfacial compatibility and adsorption characteristics of the mixed matrix membrane. In this study, the high-performance CO 2 separation membrane aP-UIO-66/Pebax was innovatively enhanced through the synergistic effects of graft modification and defect engineering on UIO-66 using nonthermal plasma technology. This approach offers a novel strategy for membrane performance optimization.
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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.
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高影响因子
危险品化学品经营许可证（带存储）