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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ChemistrySelect
·
2025
·Vol. 10
·期 11
·e202405440
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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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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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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
Frontiers of Chemical Science and Engineering
·
2022
·Vol. 16
·期 9
·1387-1398
·
IF 4.803
Han Yuyao,Xia Lei,Zhuang Xupin,Liang Yuxia
UiO-66-NH 2 is an efficient material for removing pollutants from wastewater due to its high specific surface area, high porosity and water stability. However, recycling them from wastewater is difficult. In this study, the cellulose nanofibers mat deacetylated from cellulose acetate nanofibers were used to combine with UiO-66-NH 2 by the method of in-situ growth to remove the toxic dye, rose bengal. Compared to previous work, the prepared composite could not only provide ease of separation of UiO-66-NH 2 from the water after adsorption but also demonstrate better adsorption capacity (683 mg·g −1 ( T = 25 °C, pH = 3)) than that of the simple UiO-66-NH 2 (309.6 mg·g −1 ( T = 25 °C, pH = 3)). Through the analysis of adsorption kinetics and isotherms, the adsorption for rose bengal is mainly suitable for the pseudo-second-order kinetic model and Freundlich model. Furthermore, the relevant research revealed that the main adsorption mechanism of the composite was electrostatic interaction, hydrogen bonding and π — π interaction. Overall, the approach depicts an efficient model for integrating metal-organic frameworks on cellulose nanofibers to improve metal-organic framework recovery performance with potentially broad applications.
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COMPOSITES PART B-ENGINEERING
·
2020
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IF 7.635
Shuangjiang He,Yingqing Zhan,Jiaxin Hu,Guiyuan Zhang,Shumei Zhao,Qingying Feng,Wei Yang
Multi-component pollutant-oil-water emulsion from the fast-growing industry seriously threatens the human health and ecological environment, which poses a huge challenge to membrane technology. Recently, 2D MXene materials have shown promising and potential candidates for functional separation membranes . Herein, for the first time, a multitasking hierarchical MXene@UIO-66-(COOH) 2 composite membrane supported on nylon 66 microporous substrate was designed via a facial strategy, which possessed high chemical stability and efficient multi-component pollutant-oil-water emulsion separation performance. The promising synergistic separation performance of various oil-in-water emulsions and dye, high antifouling resistance, and excellent recyclability of MXene@UIO-66-(COOH) 2 composite membrane originated from the inherent hydrophilicity , low oil adhesion feature, and hierarchical intercalation structure of membrane. Furthermore, the chemically stable MXene@UIO-66-(COOH) 2 composite membrane exhibited outstanding corrosion resistance under strong acid (3 M HCl), alkali (1 M NaOH) and salty (Saturated NaCl) solutions. Therefore, this work provides a powerful platform for designing stable and functional 2D membrane materials for multi-component pollutant-oil-water emulsion separation in harsh chemical environments.
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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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SEPARATION AND PURIFICATION TECHNOLOGY
·
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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CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Junkang Guo,Xiaohu Fan,Jiayuan Wang,Shenghui Yu,Minwang Laipan,Xinhao Ren,Chao Zhang,Lei Zhang,Yongtao Li
The design and synthesis of efficient adsorbents for recovery of precious metal from secondary resources are of great environmental and economic significance. In present study, an efficient and redox-active adsorbent (UiO-66-BTU) was fabricated by modifying Zr-MOF (Zirconium-based Metal Organic Framework) with bisthiourea for gold recovery in aqueous solution. It is indicated that Au(III) adsorbing onto UiO-66-BTU is an irreversible, favorable chemisorption process conformed to D-R model and pseudo-second-order model. The UiO-66-BTU showed significant adsorption ability (680.20 mg/g at pH 2.0) and high selectivity towards Au(III) in presence of various mixed ions in actual wastewater, which were mainly attributed to the Lewis soft–soft interaction, ion-exchange/electrostatic interactions, and redox reaction between Au(III) and S-containing functional groups. Notably, we demonstrated that the reduction of Au(III) to metallic gold as a dominant recovery mechanism involving the in situ confined nucleation, fusion and growth of AuNPs to branched Au precipitation, with Au(0) accounted for approximately 80% for the recycling products. Furthermore, the UiO-66-BTU membrane achieved similar high adsorption capacity and the membrane surface remains active to efficiently recovered metallic particles with an excellent repeatability at eight cycles of adsorption. The reduced Au particles formed isolated clusters with bigger size and regular hexagonal shape. Consequently, UiO-66-BTU has great potential for gold recycling in industrial practice.
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ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Jie Qin,Wenhui Yao,Liang Wu,Young-Rae Cho,Fusheng Pan
The conventional slippery liquid-infused porous surfaces (SLIPSs) provide relatively limited corrosion protection and self-healing performance for AZ31 Mg alloys. To this end, 8-hydroxyquinoline (8-HQ) was incorporated into a zirconium-based metal–organic framework UiO-66 through coordination (8-HQ@UiO-66), which was then dispersed into silicone oil to fabricate nanoparticle-enhanced-SLIPSs (8-HQ@UiO-66-SLIPSs). Especially, the influences of 8-HQ@UiO-66 concentration on the surface morphology, surface hydrophobicity, and corrosion resistance were studied. It was found that the surface hydrophobicity first increased and then decreased with increasing concentration, showing the highest water contact angle of 121.2° at a concentration of 1 mg mL–1 (8-HQ@UiO-66-SLIPS-1). This was attributed to the development of well-constructed hierarchical micro/nanostructures. Moreover, it also exhibited the best anticorrosion property, with the lowest corrosion current density of 1.24 × 10–10 A cm–2 and the highest impedance modulus of 9.88 × 108 Ω cm2 at 0.01 Hz, primarily associated with the synergistic interaction of 8-HQ and UiO-66. Further, the self-healing performance was evaluated using the scanning vibration electrode technique (SVET), verifying the superior self-healing performance of 8-HQ@UiO-66-SLIPS-1. Hence, the nanoparticle-enhanced-SLIPSs exhibit considerable potential in the corrosion protection of Mg alloys, thereby accelerating their extensive applications in industry.
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Chenxi Liu,Xiao Wang,Xiangze Jia,Wanlin He,Shaobo Zhang,Hongsheng Liu
To meet the demand for nondestructive detection, we developed a truly human-wearable glove biosensor, which can be applied for in-situ analysis of pesticides on crop surfaces during the picking process. Herein, the Burkholderia cepacia (BCL)@UiO-66/Pro functionalized Kevlar-based laser-induced graphene (LIG) three-electrode glove sensing system was equipped with biocompatible semisolid electrolyte. In this system, Kevlar-based LIG electrodes showed the lowest sheet resistance of 28.26 Ω/sq. and I D /I G ratio value of 0.163 with optimal laser power of 9 %. Importantly, the BCL@UiO-66/Pro modified on Kevlar-based LIG electrode enhanced the catalytic efficiency of the BCL, the absolute value of the redox potential increases from the −0.412 V to −0.664 V due to an increase in the immobilization efficiency of BCL on UiO-66 after proline modification. In addition, the Kevlar-based wearable glove biosensor exhibited high repeatability, selective and sensitive electrochemical sensing of MP at concentrations ranging from 5 to 40 μM with a low detection limit of 0.84 μM. During the 10-day storage stability test, the fabricated Kevlar-based LIG biosensor demonstrated good reusability and excellent stability for MP detection with retention of more than 96 % of its initial response. Such wearable Kevlar-based glove biosensor could be a transformative approach for the in-situ analysis of pesticide residue on crops, which could also promote future precision agriculture development.
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CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Ting Sun,Chuanyezi Cai,Jiacheng Guo,Gengqi Tong,Yu He,Xi Chen,Lu Ye,Jianjun Zhang,Sude Ma
As dielectric film as the core device of capacitors, how to enhance its dielectric and energy storage performance is crucial for the application of film capacitors. To this end, we propose a solvothermal synthesis of metal-organic framework (MOF) material UiO-66-NH 2 to explore the potential application of MOF materials in the field of dielectric energy storage. BaTiO 3 nanoparticles and MOF fillers were selected to be introduced into the PVDF/PI matrix, and nanocomposite films were prepared by the spin-coating process, which showed a strong bonding at the micro-interface of the film and a uniform macroscopic thickness without obvious aggregation. The high porosity of UiO-66-NH 2 and the high dielectric constant of BaTiO 3 , as well as the high breakdown strength E b of the polymer matrix are utilised to synergistically promote the energy density and maintain good charge/discharge stability. Notably, the BU-X/PVDF/PI nanocomposite films demonstrated good energy storage performance and stable charge/discharge efficiency η. The results show that the BU-0.5/PVDF/PI nanocomposite film has an E b of 2190 kV/cm, an energy storage density of 3.73 J/cm 3 , and stable η ranging from 60 % to 94 %, which are superior to the pure BaTiO 3 /PVDF/PI nanocomposite film in terms of overall performance. In addition, the dielectric loss of the BU-0.5/PVDF/PI nanocomposite film is as low as 0.022. These findings indicate the good prospects for the development of MOF materials in the field of energy storage.
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