APPLIED CATALYSIS B-ENVIRONMENTAL
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2026
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IF 19.7
Chen Wang,Meiyi Li,Maoning Xu,Ye Li,Quanqi Yang,Wanjing Jia,Jianjun Wang
Herein, phosphorylated MOF@COF (UiO-66-NH 2 @HDU-27-P) Type-II heterostructures were constructed to achieve selective and efficient uranium extraction. These composites were synthesized via the covalent linking of MOFs with COFs at varying ratios, and their electronic properties were analyzed using density functional theory (DFT) calculations. The optimized 6:1 composite exhibited exceptional performance, achieving (> 92.9 %) U(VI) removal in pure water and maintaining high efficiency across complex aqueous environments, including seawater. Mechanistic studies revealed that the Type-II heterojunction significantly enhances charge separation, enabling uranium capture through synergistic adsorption, photocatalytic reduction, and immobilization under non-sacrificial air conditions. This work provides a new paradigm for designing high-performance heterojunctions, offering a superior alternative to current materials for sustainable environmental remediation and uranium recovery.
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JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2026
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IF 4.4
Yanqing Yang,Yuchen Yang,Zhixian Du,Weike Zhang,Jin Liu
A Z-scheme BiOBr/COF-1 heterojunction was synthesized via a solvothermal method. • The catalyst exhibited enhanced visible-light absorption and charge separation. • A mechanism for the simultaneous removal of RhB and Cr(VI) was revealed. The construction of heterojunctions is commonly employed to boost the separation efficiency of photogenerated charge carriers and the overall photocatalytic performance. In this study, a novel Z -scheme BiOBr/COF-1 heterojunction photocatalyst was synthesized via a facile solvothermal method. Comprehensive characterization confirmed the effective formation of the heterojunction, which exhibited enhanced visible-light absorption and improved separation efficiency of photogenerated charge carriers. Compared with pristine COF-1 and BiOBr, the optimized BiOBr/COF-1 composite (BC-1) demonstrated superior photocatalytic activity for both rhodamine B (RhB) degradation and Cr(VI) reduction. Notably, the reduction efficiency of Cr(VI) was significantly enhanced in a coexisting system of RhB and Cr(VI). In addition, BiOBr/COF-1 exhibited good structural stability over multiple reaction cycles. This work provides an effective strategy for designing Z -scheme photocatalysts to treat complex wastewater containing organic and heavy metal pollutants. Download: Download high-res image (339KB) Download: Download full-size image
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ACS Applied Engineering Materials
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2026
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IF 3.5
Zehui Yao,Xinhai Zhang,Yi Wang,Xiaozu Wang,Zhaohui Wang,Zhaoliang Cui
Polyimide (PI) membranes face a trade-off between permeability and selectivity, limiting their gas separation applications. To address this, we synthesized 6FDA-DAM/DABA(DAM:DABA = 3:2) PI and two-dimensional COF-1 nanofillers, fabricating hollow fiber mixed matrix membranes (MMMs) via dry-jet wet-spinning. Under optimized conditions (25 cm air gap, 50 °C spinneret temperature, 30 °C NMP coagulation bath), the 10 wt % COF-1 incorporated membranes achieved optimal performance: tensile strength of 15.34 MPa; H2 and CO2 permeances of 79.3 GPU and 54.3 GPU, and ideal selectivities of 187.9 for H2/CH4 and 128.7 for CO2/CH4, respectively. The results demonstrate that the incorporation of COF-1 modifies solvent exchange during spinning, necessitating targeted optimization of spinning parameters to coordinate membrane structure and performance.
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TALANTA
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2026
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IF 6.1
Xu-Qin Ran,Qian-Ying Mao,Xiu-Ping Yan,Hai-Long Qian
As an emerging potential pollutant, perfluorosulfonic acids (PFSAs) pose a challenge in developing efficient analytical methods to meet diverse practical requirements. Herein, an irreversible trifluoromethyl-functionalized covalent organic framework (TFPPA-CF 3 ) is prepared via condensation of 1,3,5-trimethylphloroglucinol and 2,5-diaminobenzo-trifluoride, and then covalently immobilized on stainless steel fiber for solid-phase microextraction (SPME) of PFSAs. The irreversibility of TFPPA-CF 3 and its covalent bonding way ensure outstanding probe stability, while multiple interactions (F–F interaction, hydrophobic interaction, and electrostatic interaction) confer high affinity for PFSAs extraction. Finally, an ambient mass spectrometric analytical method using TFPPA-CF 3 -based SPME is developed for direct and chromatography-free detection of trace PFSAs, achieving detection limits of 0.71–1.11 ng L −1 and linear ranges of 10–10000 ng L −1 . The TFPPA-CF 3 probe exhibits good stability, preserving over 90 % of extraction efficiency after 100 recycles. The spiked recoveries of the developed method range from 91.6 % to 111.8 % in real-world samples, confirming its practical applicability.
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Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 3
·122206
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IF 7.5
Xiaorui Du,Lifei Liu,Pengfei Li,Luyuan Zhang,Yang Deng,Xia An,Xu Wu
The persistence of tetracycline antibiotics in aquatic environments poses significant harm to both ecological systems and public health. In this study, a Cu-MOF-74@TAPT-DHTA-COF hetero-framework was designed by constructing interfacial Cu-N/O coordination bonds, which create efficient electron transfer pathways that enhance charge separation and migration. Mechanistic investigation demonstrated that the molecular oxygen adsorption and activation was enhanced by this interfacial coordination engineering, promoting the selective production of singlet oxygen ( 1 O 2 ) and thus accelerating the photo-oxidation of tetracycline (TC). The hetero-framework achieved 91.5% TC removal within 60 min with apparent value of 0.03325 min⁻¹ . This constant is 2.0 times that of Cu-MOF-74 and 1.9 times that of TAPT-DHTA-COF. Toxicity evaluation confirmed effective reduction of ecological risks, with all final degradation products testing negative for mutagenicity. Furthermore, a photocatalytic membrane reactor based on the hetero-framework demonstrated nearly complete contaminant removal and exceptional stability in continuous-flow wastewater treatment, highlighting its practical applicability. This work elucidates the molecular-level mechanism of 1 O 2 generation boosted by the interfacial coordination engineering and provides novel design principles for advanced photocatalytic water treatment technologies.
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DYES AND PIGMENTS
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2026
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IF 3.9
Yanxin Li,Chunhong Wang,Jianhao Liu,Rang Li,Shijuan Zhang
Eu-COF was synthesized via a one-pot room-temperature method for the first time. • Dipicolinic acid triggered the emission of Eu 3+ and quench the fluorescence of COF, achieving its ratiometric detection. • The method is extendable to the fabrication of various Ln-COFs. A novel Eu 3+ -functionalized covalent organic framework (Eu-COF) was synthesized via a one-pot room-temperature Schiff base condensation between 2,5-diethoxybenzene-1,4-dicarbohydrazide (DEDH) and tetrakis(4-formylphenyl)ethylene (TFPE), breaking away from the traditional “synthesize first, modify later” strategy. The COF not only provided abundant anchoring sites for Eu 3+ ions, but also served as fluorescence reference. Dipicolinic acid (DPA) transferred energy to Eu 3+ via the antenna effect, triggering the characteristic emission of Eu 3+ at 619 nm, while the characteristic emission peak of COF at 556 nm was simultaneously reduced due to the photoinduced electron transfer and inner filter effect between COF and DPA, which led to the fluorescence quenching of COF, achieving the ratiometric detection of DPA. The synthesized Eu-COF exhibits a good linearity in the range of 0–100 μM, with a detection limit of 0.52 μM. This study pioneers the first one-pot room-temperature synthesis method for Eu 3+ -functionalized COFs. Download: Download high-res image (356KB) Download: Download full-size image
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JOURNAL OF FOOD COMPOSITION AND ANALYSIS
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2025
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IF 4.6
Qiao Yan,Pingping Zhang,Menglin Wang,Ling Ma,Ke Wang,Kaoqi Lian
This study aimed to synthesize a novel magnetic covalent organic framework (COF)-based material and establish an efficient magnetic solid-phase extraction (MSPE) method for the determination of benzimidazoles (BZDs) in honey. Given the abundant nitrogen atoms in BZDs, the target material (Fe₃O₄@SiO₂@MPA-TAPT-COF) was designed with Fe₃O₄ as the magnetic core and a COF shell polymerized from 5-bromobenzene-1,3-dicarbaldehyde (MPA) and 4,4',4''-(1,3,5-triazine-2,4,6-triyl) trianiline (TAPT). The synthesized Fe₃O₄@SiO₂@MPA-TAPT-COF exhibited considerable specific surface area, good magnetic responsiveness, and excellent reusability. An MSPE method using Fe₃O₄@SiO₂@MPA-TAPT-COF as the adsorbent was developed for the purification of BZDs in honey, followed by quantification via ultra-performance liquid chromatography–tandem mass spectrometry (UPLC-MS/MS). This method featured simple operation, high sensitivity, and good efficiency. Under optimized MSPE conditions, It showed good linearity for 17 BZDs in the concentration range of 0.2–100 μg/L, with correlation coefficients (R²) ≥ 0.9991. The limits of detection (LODs) for BZDs in honey were as low as 0.009–0.342 μg/kg. For spiked honey samples, the recoveries of the 17 target BZDs ranged from 61.44 % to 118.90 %.These results confirm that Fe₃O₄@SiO₂@MPA-TAPT-COF is a promising adsorbent for sample pretreatment, and the developed method provides a reliable tool for the sensitive and efficient analysis of BZDs in honey.
研究领域:
分析化学
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食品安全
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环境科学
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材料科学
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MICROCHIMICA ACTA
·
2022
·Vol. 189
·期 9
·1-9
·
IF 6.408
Li Zhentao,Li Qiaoyan,Hu Zhuang,Hu Changjun,Cui Xinyue,Fu Yuanyuan,Chen Zilin
Covalent organic frameworks (COFs) with good chemical stability, flexible chemical functionalization, tunable pore sizes, and high specific surface areas have been increasingly employed in the field of fluorescence sensing. In this work, a crystalline vinyl-functionalized COF TzDa-V was facilely prepared through a room-temperature synthetic method via condensation reaction between 4,4′,4″-(1,3,5-triazine-2,4,6-triyl)trianiline (Tz) and 2,5-diallyloxyterephthalaldehyde (Da-V). The intermolecular charge transfer (ICT) effect endowed the TzDa-V with fluorescence characteristic, and it was sensitive to trace water and can be quenched due to the disruption of ICT process by water. On this base, the prepared COF TzDa-V with excellent chemical/thermal stability was applied to sensing of trace water in common organic solvents such as DMF, acetone, THF, and ethyl acetate with rapid response (less than 10 s), satisfactory sensing range (0.5–18% water in DMF, 0.5–15% water in acetone, 0.5–16% water in THF, 0.5–5% in ethyl acetate, v/v), and high sensitivity. The limits of detection for water in DMF, acetone, THF, and ethyl acetate were 0.0497%, 0.0590%, 0.0502%, and 0.0766% (v/v), respectively. The proposed probe was successfully used for the detection of trace water in food products such as salt and sugar. The COF TzDa-V would be a good candidate for application in water sensing. Graphical abstract
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Energies
·
2022
·Vol. 15
·期 9
·3405
·
IF 3.252
Xiaoyu Meng,Yinan Lv,Jihong Wen,Xiaojing Li,Luman Peng,Chuanbo Cong,Haimu Ye,Qiong Zhou
Perfluorosulfonic acid (PFSA) polymer is considered as a proton exchange membrane material with great potential. Nevertheless, excessive water absorption caused by abundant sulfonic acid groups makes PFSA have low dimensional stabilities. In order to improve the dimensional stability of PFSA membranes, nanofibers are introduced into PFSA membranes. However, because nanofibers lack proton conducting groups, it usually reduces the proton conductivities of PFSA membranes. It is a challenge to improve dimensional stabilities while maintaining high proton conductivities. Due to the structural designability, covalent organic frameworks (COFs) with proton conductive groups are chosen to improve the overall performance of PFSA membranes. Herein, COFs synthesized in situ on three-dimensional PAN nanofibers were introduced into PFSA to prepare PFSA@PAN/TpPa-SO3H sandwiched membranes. The PFSA@PAN/TpPa-SO3H-5 composite membrane exhibited outstanding proton conductivity, which reached 260.81 mS·cm−1at 80 °C and 100% RH, and only decreased by 4.7% in 264 h. The power density of a single fuel cell with PFSA@PAN/TpPa-SO3H-5 was as high as 392.7 mW·cm−2. Compared with the pristine PFSA membrane, the conductivity of PFSA@PAN/TpPa-SO3H-5 increased by 70.0 mS·cm−1, and the area swelling ratio decreased by 8.1%. Our work provides a novel strategy to prepare continuous proton transport channels to simultaneously improve conductivities and dimensional stabilities of proton exchange membranes.Keywords:electrospinning;perfluorosulfonic acid;nanofibers;covalent organic frameworks;proton exchange membranes;fuel cell;polyacrylonitrile;dimensional stability
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Journal of Environmental Chemical Engineering
·
2021
·
IF 5.909
Xianliang Xu,Nan Zhang,Yan Gao,Tao Bao,Sicen Wang
In the present work, a novel composite CCF@UiO-66-NH 2 @TpBD (CCF stands for carboxyl cotton fiber) was fabricated for the extraction and removal of BPs from aqueous samples. Both the UiO-66-NH 2 (MOF) and TpBD (COF) were immobilized on CCF through feasible layer-by-layer and Schiff base reaction, and characterized using field emission scanning electron microscopy (FESEM) equipped with energy dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), and X-ray photoelectron spectroscopy (XPS) techniques. The CCF@UiO-66-NH 2 @TpBD was packed in pipette tip as micro-column to investigate the adsorption of BPs using a pipette tip solid-phase extraction (PT-SPE) method. Various parameters (sampling flow rate, sample pH, amount of adsorbent, ionic strength, methanol concentration, and flow rate of eluent) affecting the extraction efficiency were optimized. Based on strong π-π conjugation, hydrogen bonding, and hydrophobic interactions, the adsorbent exhibited good extraction and removal capability. A low limit of detection (0.16–0.75 ng/mL) and a high adsorption (4.3–5.6 mg/g) were obtained. Accordingly, the composite CCF@UiO-66-NH 2 @TpBD material was shown to be a suitable adsorbent for the extraction and removal of BPs from aquatic samples due to excellent reusability, reproducibility, and high adsorption capacity.
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ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Nan Wang,Jianguo Liu,Long Tang,Xiuzhi Wei,Chenguang Wang,Xinjun Li,Longlong Ma
The development of transition metal-based heterogeneous catalysts for economical and efficient synthesis of secondary imines remains both desirable and challenging. Herein, for the first time, we present two kinds of Rh nanoparticle anchored uniform spherical COF heterogeneous catalysts with well-defined crystalline structures for the effective one-pot tandem reductive amination of aldehydes on a gram scale. This reaction is carried out using ammonia as a nitrogen source and hydrogen gas as the source of hydrogen, which is not only an atom-economical but also an environmentally friendly process for the selective production of secondary imines. In particular, in the presence of the better-designed Rh nanoparticles anchored COF2 catalyst, the starting material aldehydes could be fully converted (99% conversion), and 95% selectivity of N-benzylidene(phenyl)methanamine is obtained under mild reaction conditions (2 MPa of H2 and 90 °C). Additionally, the Rh/COF2 catalyst is also applied to a variety of substituted aromatic aldehyde compounds, manifesting good yields in corresponding secondary imines. This work not only expands the COF family but also offers economical and effective access to acquire various aromatic amine targets, especially secondary imines.
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ANALYTICA CHIMICA ACTA
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2020
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IF 5.977
Jiating Zheng,Shuyao Huang,Yuanjun Tong,Songbo Wei,Guosheng Chen,Siming Huang,Gangfeng Ouyang
The secretion disorder of sex hormones is the source that leads to the occurrence of many diseases such as polycystic ovarian syndrome (PCOS), hyperandrogenism and so on. There exist physiological changes in human body when slight fluctuations in concentrations of sex hormones happen. Therefore, it’s of great significance for accurate detection of sex hormones in human body. In this work, TpPa-1 COF solid-phase microextraction (SPME) fiber was prepared using high-efficient in-situ synthesis strategy and coupled with HPLC-MS/MS to detect three sex hormones, including Progesterone (P), testosterone (T) and dehydroepiandrosterone (DHEA) in human serum. The thickness of the coating reached 7 μ m within 2 h. Under the optimal conditions, the established method presented low limit of detections (LODs, ≤ 0.75 ng/mL), wide linear ranges (0.100–100 ng mL −1 ) and good reproducibility, and three sex hormones (T, P, DHEA) were successfully detected and quantified in human serum. In conclusion, the established SPME method presented high-efficient fiber preparation and good analytical performances of sex hormone detection, therefore was in great potential for application in clinical.
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