COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
·
IF 5.4
Yu Guo,Jiawei Huang,Wenzhong Yang,Hui Xu
To address the persistent challenge of antibiotic contamination in aquatic systems, we developed a novel bimetallic hydrogel composite, i.e., Co/Zn-UiO-66-PAA/chitosan @biochar (Co/Zn-UPCB) through strategic integration of polyacrylic acid (PAA)-functionalized metal organic frameworks (UiO-66), lotus leaf-derived biochar, and natural chitosan. This hierarchically porous architecture synergistically combines chemical functionality (abundant carboxyl/amino groups), structural stability (3D crosslinked network), and bimetallic active sites (Co²⁺/Zn²⁺), exhibiting remarkable adsorption capacities of 1693.45 mg/g for tetracycline (TC) at pH of 7 and 1201.63 mg/g for ofloxacin (OFL) at pH of 5. Additionally, kinetic and isotherm studies reveal distinct removal pathways. TC adsorption follows chemisorption-dominated monolayer binding via coordination and hydrogen bonding, while OFL removal occurs through physisorption-driven electrostatic interactions. The Co/Zn-UPCB composite maintains near 80% efficiency after ten regeneration cycles and demonstrates strong anti-interference capability against common coexisting ions (except Ca²⁺). This work provides a sustainable design leveraging waste-derived biochar and biopolymer for efficient adsorption of TC/OFL, enabling precision water remediation.
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JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2024
·
IF 4.1
Lingtao Liu,Lijian Wang,Jingxin Tan,Cong Yu,Junjie Bian,Xinbo Wang
Photocatalytic selective oxidation of furfural is a green, gentle way of preparing furoic acid. Photocatalytic oxidation effectively avoids the problems of difficult separation and high energy consumption in subsequent work-ups caused by the use of homogeneous oxidants. The photocatalytic process suffers from uncontrollable reactive oxygen species, resulting in low selectivity of the target product and excessive oxidation. Therefore, the K x -C 3 N 4 /UiO-66-NH 2 -Y catalyst was prepared by the mass proportion of UiO-66-NH 2 and K x -C 3 N 4 to form a heterogeneous structure, and the band gap width was adjusted to effectively avoid the formation of non-target strong reactive oxygen species ( OH). The results showed that: the aqueous 0.1 mM Na 2 CO 3 solution had an inhibitory effect on the non– target reactive oxygen species at room temperature; when the reaction time was 5 h and K 0.1 -C 3 N 4 /UiO-66-NH 2 -20, the furoic acid had the highest yield of 70.7, the target reactive oxygen species was confirmed by free radical capture experiments as O 2 – , and it was postulated that the reaction mechanism for the preparation of furoic acid by selective oxidation of furfural.
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Water Conservation Science and Engineering
·
2025
·Vol. 10
·期 3
·1-16
·
IF 1.9
Li Zhengjie,Fang Chunxia,Ma Xilong,Liu Yixian,Xie Juan,Li Pengfei,Zhang Zhikun,Zhao Xudong,Sun Hua,Han Jilong
Herein, a facile and rapid preparation method was developed to synthesize Ce-doped UiO-66-NH 2 through a one-pot solvothermal method. This approach simultaneously introduces functional groups onto organic ligands and incorporating a novel metal into metal clusters. The incorporation of Ce ions effectively enlarged the pore size and increased the pore volume, thereby facilitating the diffusion of specific adsorbate molecules into the inner adsorption sites provided by the –NH 2 groups. Due to the favorable pore structures and more exposed adsorption sites, the safranine T (ST) adsorption capacity of Ce-doped UiO-66-NH 2 was ten times higher than the pristine UiO-66-NH 2 and reached 1340 mg/g at optimal adsorption conditions, surpassing most of the reported porous adsorbents. The kinetic and isotherm fitting results showed that the pseudo-second-order and Langmuir models described the adsorption behaviors of ST best, indicating a homogeneous, endothermic, and spontaneous monolayer adsorption process. The adsorption mechanism showed that the hydrogen bonding interaction and pore filling effect are identified as the main mechanism whilst electrostatic attraction interaction further enhances the adsorption capacity at optimal pH. Therefore, Ce-doped UiO-66-NH 2 can serve as a promising adsorbent for the removal of cationic dyes from textile wastewater, and the developed facile and rapid method offers a viable strategy to construct novel MOF-based adsorbents.
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ChemistrySelect
·
2025
·Vol. 10
·期 33
·e03026
·
IF 2
Yongzhao Zhang,Yunlei Zhou,Jiahang Wang,Heng Ban,Rongjie Xu,Junhao Pan,Fusheng Ge,Zhenya Zhu,Luping Lyu
Graphical MOFs-templated MgO/ZrO 2 enable highly selective glucose-to-fructose conversion. Structural confinement suppresses MgO agglomeration and tunes basicity, achieving 38.4% yield with 90.9% selectivity. High-selectivity glucose isomerization to fructose is essential for the biorefinery industry and fructose syrup production. In this work, a catalyst with tailored basicity was synthesized via the calcination of a MOFs (metal-organic frameworks)-based composite and employed as a chemo-catalyst for glucose isomerization, achieving high fructose selectivity. Characterization results confirmed that the synthesized catalyst was a composite consisting of and MgO, with MgO highly dispersed within the channels of . The MOFs templating effect restricted particle size and minimized agglomeration of MgO particles, enhancing the interaction between MgO and . This strong interaction effectively modulated the basicity of the catalyst, resulting in the predominance of weak basic sites. As a result, the catalyst demonstrated superior performance in glucose isomerization, achieving a 38.4% fructose yield with 90.9% selectivity at a 10 wt% glucose concentration, outperforming catalysts prepared by conventional methods. However, leaching remains a challenge. This work presents a novel approach for synthesizing highly dispersed mixed oxides and provides an effective catalyst for glucose isomerization.
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Journal of Environmental Chemical Engineering
·
2025
·Vol. 13
·期 6
·120451
·
IF 7.2
Yang Li,Guozhe Sui,Mingna Chu,Yan Zhuang,Dongxuan Guo,Shuang Meng,Dantong Zhang,Yue Li,Jinlong Li
Photocatalytic water splitting is a highly promising approach for sustainable hydrogen production. However, a critical challenge lies in developing photocatalysts that simultaneously achieve efficient charge separation and abundant catalytic active sites. Herein, a novel heterojunction system composed of ZnIn 2 S 4 integrated with copper-modified UiO-66-NH 2 (ZnIn 2 S 4 /Cu-UiO-66-NH 2 ) is developed as an efficient photocatalyst for hydrogen production. The optimal ZnIn 2 S 4 /Cu-UiO-66-NH 2 exhibits a hydrogen evolution rate of 630.25 μmol g −1 h −1 under visible-light irradiation, demonstrating a remarkable 114-fold enhancement compared to pristine UiO-66-NH 2 . The excellent photocatalytic performance originates from the novel Z-scheme charge transfer mechanism between ZnIn 2 S 4 and Cu-UiO-66-NH 2 , which facilitates efficient charge separation while maintaining strong redox capabilities. Furthermore, the incorporated Cu species serve as highly efficient active sites for hydrogen evolution. This work provides a rational design strategy for constructing Z-scheme heterojunctions, advancing the development of efficient artificial photosynthesis systems for sustainable energy applications.
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Analytical Methods
·
2020
·Vol. 12
·期 41
·4967-4976
·
IF 2.596
Xin Yao,Jinhui Shen,Qingyan Liu,Huanbao Fa,Mei Yang,Changjun Hou
In this work, we designed and synthesized a nanocomposite comprising an amine-functionalized metal organic framework (UiO-66-NH2), a multiwalled carbon nanotube@reduced graphene oxide nanoribbon (MWCNT@rGONR) and a covalent organic framework (COF) synthesized using melamine and cyanuric acidmonomers via polycondensation (represented by MCA). The UiO-66-NH2/MCA/MWCNT@rGONR nanocomposite was used as a sensitive platform for an electrochemical aptasensor to detect kanamycin (kana). Owing to the rich chemical functionality, amino-rich structure and excellent electrochemical activity, the cDNA strands with terminal amino groups can not only anchor over the UiO-66-NH2/MCA/MWCNT@rGONR surface but also penetrate into the interior of porous UiO-66-NH2/MCA/MWCNT@rGONR networks. The characterization of the UiO-66-NH2/MCA/MWCNT@rGONR nanocomposite was performed by scanning electronic microscopy (SEM), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared (FT-IR) spectroscopy and X-ray diffraction (XRD). Furthermore, cyclic voltammetry (CV) and square wave voltammetry (SWV) were employed for the electrochemical performance study of this biosensor. The results indicated that the UiO-66-NH2/MCA/MWCNT@rGONR nanocomposite exhibited high bioaffinity toward the aptamer and the lowest limit of detection at 13 nM (S/N = 3) within a linearity of the kana concentration of 25–900 nM. In addition, it possessed great repeatability, stability and selectivity and obtained satisfactory recovery results in the real analysis of fish meat and milk, indicating the great potential for analytical measurements in food safety.
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INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Jin Chai,Chunpeng Liu,Hongtian Yang,Yide Han,Yufeng Liu,Ying Zhang,Xia Zhang
The bifunctions of fluorescence activity and peroxidase mimics were well-integrated by a hemin chloride-modified Zr-based metal–organic framework (Hemin@NH2-UiO-66), which can catalyze the oxidation of o-phenylenediamine (OPD) to generate 2,3-diaminophenazine (DAP), presenting typical peroxidase mimic properties. The influence of the introduction of hemin chloride upon the enhanced peroxidase mimic activity was clarified, and the nanozyme catalytic parameters were optimized. Interestingly, the oxidized product of DAP presents strong fluorescence emission at 564 nm; combining it with the intrinsic fluorescence emission of NH2-UiO-66 at 452 nm, a dual-emission system could be built up by the resulting Hemin@NH2-UiO-66 in the presence of definite OPD and H2O2. Moreover, the fluorescence quenching effect (564 nm) was observed by adding l-cysteine (l-Cys); based on that, a straight-line dependence of the fluorescence intensity ratio (I452/I564) upon the concentrations of l-Cys was established. The detection limit was 0.21 μmol, and the analytical selectivity for l-Cys was also demonstrated. The work highlights the idea of combining the intrinsic fluorescence property and nanozyme catalytic activity in a functional MOF, and its special usability is found in the ratiometric fluorescence sensing analyses.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Weibo Lu,Huangwei Ye,Yike Zhu,Yuhan Li,Huan Li,Qing Shen,Jian Chen
The non-destructive, real-time, and visual assessment of fish freshness is crucial for maintaining food quality and safeguarding public health. In this study, a pH-sensitive and colorimetric enhancement film was developed using a carboxymethyl cellulose/anthocyanin/metal-organic framework (CMC-BA-UIO). The concentration of UIO-66 in the film-forming solution significantly influences the mechanical properties and ammonia responsiveness of the indicator film, with the CMC-BA/2.5%UIO-66 variant exhibiting optimal performance. When utilized for real-time fish freshness monitoring at 4 °C, the CMC-BA/2.5%UIO-66 indicator film demonstrated a distinct color transition from purple to yellow, which exhibited a strong correlation with the rot index (TVB-N) of the fish. These findings indicate that the developed indicator film has potential applications in intelligent packaging for monitoring food shelf life, providing a visual alert to producers and consumers regarding food spoilage.
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Membranes
·
2021
·Vol. 11
·期 1
·35
·
IF 4.106
Jiangfeng Lu,Xu Zhang,Lusheng Xu,Guoliang Zhang,Jiuhan Zheng,Zhaowei Tong,Chong Shen,Qin Meng
Development of mixed matrix membranes (MMMs) with excellent permeance and selectivity applied for gas separation has been the focus of world attention. However, preparation of high-quality MMMs still remains a big challenge due to the lack of enough interfacial interaction. Herein, ionic liquid (IL)-modified UiO-66-NH2filler was first incorporated into microporous organic polymer material (PIM-1) to prepare dense and defect-free mixed matrix membranes via a coating modification and priming technique. IL [bmim][Tf2N] not only improves the hydrophobicity of UiO-66-NH2and facilitates better dispersion of UiO-66-NH2nanoparticles into PIM-1 matrix, but also promotes the affinity between MOFs and polymer, sharply reducing interface non-selective defects of MMMs. By using this strategy, we can not only facilely synthesize high-quality MMMs ignoring non-selective interfacial voids, but also structurally regulate MOF nanoparticles in the polymer substrate and greatly improve interface compatibility and stability of MMMs. The method also gives suitable level of generality for fabrication of versatile defect-free MMMs based on different combination of MOFs and PIMs. The prepared UiO-66-NH2@IL/PIM-1 membrane exhibited outstanding gas separation behavior with large CO2permeation of 8283.4 Barrer and high CO2/N2selectivity of 22.5.Keywords:mixed matrix membrane;amino-functional UiO-66;PIM-1;[bmim][Tf2N];gas separation
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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.
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JOURNAL OF CHROMATOGRAPHY A
·
2018
·
IF 3.716
Zhiming Yan,Mei Wu,Biqing Hu,Minna Yao,Lan Zhang,Qiaomei Lu,Jie Pang
In this work, metal-organic framework particles incorporated fibers (UiO-66/PAN nanofibers) were used as adsorbent in pipette tip solid phase extraction (PT-SPE) for the first time. The UiO-66/PAN nanofibers were fabricated by a facile electrospinning method and characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, X-ray diffraction and nitrogen adsorption-desorption experiments. The UiO-66/PAN nanofibers were applied to assemble a novel PT-SPE cartridge for determination of four phytohormones followed by high performance liquid chromatography (HPLC). Several experimental parameters such as kinds of UiO-66/PAN nanofibers, the amount of UiO-66/PAN nanofibers, the effect of solution pH, ionic strength and desorption conditions were intensively investigated. Under the optimal conditions, the linear ranges of the phytohormones were in the range of 0.06–60 ng/mL with correlation coefficients above 0.992. The limits of detection were between 0.01 ng/mL to 0.02 ng/mL. The interday and intraday precision (RSD) for three replicate extractions of the four phytohormones (15 ng/mL for each) was in the range of 1.5–5.6%. The established method was successfully applied for the determination of phytohormones in watermelon and mung bean sprouts samples. The results showed that the electrostatic interaction between the positively charged UiO-66 and anionic forms of phytohormones played an important role in the extraction of the phytohormones.
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MICROCHEMICAL JOURNAL
·
2022
·
IF 5.304
Fujian Xu,Jinyi Zhang,Xiaoliang Zeng,Zhou Long,Xiandeng Hou
Alkaline phosphatase (ALP) is now a well acknowledged indicator for diverse clinical diseases correlated with its abnormal expression. Compared to the assays by traditional and lately emerging methods, the fluorescent (FL) sensing, especially in the turn-on mode, has become more favored due to its simplicity, low cost, and high sensitivity and precision. However, the feasible FL probes are still limited and suffering from poor biological compatibility, complex preparation, additional modification or function-alization. Herein, we found that one common metal–organic framework, UiO-66-NH 2 at nanoscale, could act as a new and label-free FL probe for facile sensing of ALP in the turn-on mode, based on the simple aid by phenyl phosphate which could be hydro-lyzed by ALP, with the product of phosphate ion enhancing the FL emission of UiO-66-NH 2 via simple adsorption. Unlike many other FL probes in the turn-on mode, it was unnecessary to quench the FL of the probes in advance, greatly simplifying the sensor design. Moreover, by use of a new method based on dielectric barrier discharge (DBD), the UiO-66-NH 2 could be prepared in 10 min, much shorter than that (usually hours) for preparing most other FL probes for ALP assay. The limit of detection was 0.4 U L -1 , superior or at least rivalrous to the previously reported ones, and the ALP assay was also accomplished for real serum samples, with the analytical results highly consistent with those obtained by the clinical procedures, revealing its high practical utility.
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