INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2026
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IF 9.2
Qi Qi,Jiawen Liu,Hang Xu,Wei Wen,Zhonghua Li
Constructing heterostructures serves as an effective strategy to address the low separation efficiency of photogenerated carriers in covalent organic frameworks (COFs). Herein, we leverage the structural features of TpBpy-COF bearing carbonyl and bipyridine moieties to fabricate covalently linked Zr-MOF-NH 2 @COF and coordination-linked Zr-MOF@COF via reactions with UiO-66-NH 2 and UiO-66, respectively. The findings reveal that both Zr-MOF-NH 2 @COF and Zr-MOF@COF exhibit excellent photocatalytic hydrogen evolution activity compared with the physically mixed Zr-MOF-NH 2 &COF and Zr-MOF&COF composites, owing to the formation of tightly interfaces. In particular, Zr-MOF-NH 2 @COF shows obviously improved hydrogen production performance. The optimal sample Zr-MOF–NH 2 –10@COF achieves an outstanding hydrogen production rate of 37.67 mmol g −1 h −1 , which is 1.3 times that of Zr-MOF@COF. The Zr-MOF-NH 2 @COF S-scheme heterojunction facilitates charge separation and boosts photocatalytic H 2 evolution. This work compares covalently and coordination-linked MOF@COF heterostructures to guide interfacial optimization of related photocatalysts.
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FOOD CHEMISTRY
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2020
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IF 6.306
Hai-Long Jiang,Quan-Bin Fu,Ming-Lin Wang,Jin-Ming Lin,Ru-Song Zhao
In this study, a novel porous composite (Fe 3 O 4 @TAPB-COF@ZIF-8) consisting of metal–organic and covalent organic frameworks was developed and applied to the magnetic solid-phase extraction (MSPE) of bisphenols. The extraction parameters such as the extraction time, solution pH, amounts of adsorbent, and ionic strength were investigated to obtain the best extraction conditions. By optimizing the MSPE, a convenient and sensitive analytical method was established in combination with high-performance liquid chromatography. The method achieved low detection limits (0.04–0.05 ng mL −1 ), wide linear range (0.25–1000 ng mL −1 ), good repeatability (1.20–4.30%), good reproducibility (1.34–4.03%), and satisfactory recoveries of four functional beverages (66.2–116.6%).
研究领域:
分析化学
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环境科学
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Catalysis Science & Technology
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2023
·Vol. 13
·期 21
·6198-6210
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IF 5
Jun Pang,Weijie Chen,Jintao Hu,Jie Cheng,Mingqiang Tang,Zewei Liu,Rong Tan
Metal–organic frameworks (MOFs) have emerged as promising photocatalysts due to their tunable architectures and semiconductor-like behavior. However, their photocatalytic efficiency is often hampered by suboptimal light utilization and fast charge carrier recombination. To address these challenges, we developed core–shell MOF@COF Z-scheme hybrids, where a covalent organic framework (COF, TpBD-COF) was coated on the NH2–UiO-66 surface via imine bond interconnection. Characterization and DFT calculation results suggested the formation of a well-contacted interface, as well as a Z-scheme heterojunction between the NH2–UiO-66 core and TpBD-COF shell. The TpBD-COF shell with an inherently narrow energy band contributed to the visible light absorption, while the fabricated Z-scheme heterojunction resulted in the spatial electron–hole (e−–h+) separation and high redox ability. By rationally controlling the ratio of NH2–UiO-66 and TpBD-COF precursors, the tailored thickness of the TpBD-COF shell was achieved, which could modulate the Z-scheme heterojunction interface, and thus optimized the photocatalytic performance. The core–shell MOF@COF hybrids were highly efficient in visible light-driven oxidative coupling of amines to imines in air without the need for any sacrificial agents. Almost quantitative conversion (94%) of benzylamine to N-benzylidenebenzylamine was achieved over optimal NH2–UiO-66@TpBD-COF(21.9), which is approximately 4.0 and 1.5 times that of pristine NH2–UiO-66 and TpBD-COF, respectively. The superior catalytic performance, coupled with benign reaction conditions (visible light, room temperature, ambient air), makes NH2–UiO-66@TpBD-COF(x) highly promising for solar utilization in green synthesis.
研究领域:
材料科学
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化学
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TALANTA
·
2024
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IF 5.6
Wei-Tao Li,Shuo Zhang,Huanhuan Guo,Ling Yu,Cuijuan Xing
As a new type of porous crystalline composite material, MOF-COF has shown great advantages in metal separation. Herein, a CoMOF-COF was designed for highly selective separation of trace Pb 2+ ions. The designed CoMOF-COF has a high density of nitrogen-oxygen functional groups and can selectively separate metal ions . There is a strong affinity between the designed CoMOF-COF material and metal Pb 2+ ions, which can be attributed to the ordered heterogeneous porous structure and large amounts of nitrogen-and oxygen-containing functional groups. The composite showed high adsorption selectivity for Pb 2+ ions and had adsorption capacity of 33 mg g −1 , with high chemical stability. Based on this solid phase extraction material, a high sensitivity detection method for Pb 2+ ions was established, which has the detection limit of 37.3 ng L −1 , precision of 1.9 %. Linear detection range is 0.2–10 ng mL −1 , and the detection of Pb 2+ ions in actual water samples was realized. Through this study, it is proved that the strong affinity between the designed CoMOF-COF materials and metal Pb 2+ ions can be attributed to the soft and hard acid-base theory, which reveals the structure-activity relationship between the porous heterostructure of such materials and metal separation, providing a highly selective separation material for the separation of other environmental pollutants .
研究领域:
材料科学
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环境科学
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化学工程
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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 Environmental Chemical Engineering
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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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Journal of Environmental Chemical Engineering
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2021
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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.
研究领域:
环境科学
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材料科学
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MICROCHEMICAL JOURNAL
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2026
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IF 5.2
Chenyang Wang,Haiyang Wang,Xiaozhi Li,Shumin Wang,Xiwen He,Langxing Chen,Yukui Zhang
MOF/COF composites merge the properties of metal-organic frameworks (MOFs) and covalent organic frameworks (COFs), thus holding great promise for the dual-emission fluorescence sensing applications. In this work, COF TAPA-TFPB and NH 2 -MIL-53(Al) were integrated to form a MOF/COF TAPA-TFPB composite using a simple and safe room-temperature synthesis approach. The resulting composite not only mitigates the stringent synthesis conditions typically associated with COFs but also suppresses the aggregation-caused quenching (ACQ) effect of COFs, and effectively coordinates the fluorescence properties of both MOFs and COFs as well. The quenching of both emission peaks at 435 nm and 580 nm was observed as the analyte concentration increased. Based on this dual-response, a ratiometric probe was constructed using the intensity ratio I 435 /I 580 . The resulting ratiometric platform rapidly detects nitrofurans (NFs) within 5 min, shows a linear response from 0 to 100 μM with a detection limit of 0.057–0.102 μM. This work expands the synthetic approach to MOF/COF composites, facilitating their development as multi-emission sensors in detecting various pollutants.
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Journal of Materials Chemistry A
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2026
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IF 9.2
Chen Wang,Maoning Xu,Quanqi Yang,Ye Li,Wanjing Jia,Zhengwen Han,Jianjun Wang
UiO-66 exhibits exceptional stability compared to other metal-organic frameworks (MOFs), while its amino-functionalization enhances photocatalytic performance. Similarly, covalent organic frameworks (COFs) like the cyano-containing HDU-105 serve as ideal photocatalytic platforms due to their optoelectronic properties and ability to improve charge separation. In this study, we designed a series of core-shell structured UiO-66-NH2@HDU-105 heterojunctions for the efficient photocatalytic reduction of hexavalent chromium (Cr(VI)). We systematically investigated the optimal combination ratio, finding that a MOF@COF mass ratio of 2:1 achieved a maximum reduction efficiency exceeding 99 %, significantly outperforming individual UiO-66-NH2 (31 %) and HDU-105 (36 %). Mechanistic studies revealed that the composite operates via a Z-scheme charge transfer pathway, electrons transfer from the conduction band of UiO-66-NH2 to the valence band of HDU-105, while h⁺ accumulates in the UiO-66-NH2 region. Under acidic conditions, electrons attached to HDU-105 can directly reduce Cr(VI) to Cr(III). Furthermore, the UiO-66-NH2@HDU-105 composite demonstrated excellent selectivity and long-term stability in both laboratory settings and real water matrices (groundwater and surface water). Ultimately, this study presents a viable design strategy for developing efficient and robust photocatalysts for heavy metal remediation.
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ACS Applied Materials & Interfaces
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2023
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IF 9.5
Xueping Quan,Bing Yan
Metal-organic framework (MOF) and covalent-organic framework (COF) hybrid materials can combine the unique properties of MOF and COF components, and their applications in fluorescence sensing have attracted more and more attention. Herein, ZIF-90 is grown on 3D-COF by a simple in situ growing method in which the 7-amino-4-methylcoumarin (AMC) is encapsulated in ZIF-90 to construct a fluorescent sensor. Chloroquine phosphate (CQP) can coordinate with Zn2+ to decompose the ZIF-90 and release AMC. At 365 nm excitation, the ratiometric fluorescence signal AMC/3D-COF (I430/I598) increases linearly with CQP in a linear range of 4 × 10–5 to 4 × 10–4 M in urine. Under 340 nm excitation, quantitative analysis of CQP in the serum (3 × 10–6 to 4 × 10–5 M) is based on the fluorescence intensity of Zn-CQP/3D-COF (I384/I598). In addition, AMC@ZIF-90/3D-COF (1) exhibits high anti-interference and selectivity in sensing of FA with a “turn off” mode, with a correlation range of 1 × 10–5 to 1 × 10–3 M. The fluorescence color changes triggered by CQP under different excitation conditions, and the different fluorescence responses caused by CQP make it a highly secure anticounterfeiting platform. The synthesized dye@MOF/COF hybrids not only provide a new way to integrate multiple emission to design fluorescent probes for differentiation detection but also offer ideas for the design of anticounterfeiting platforms.
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FOOD CHEMISTRY
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2026
·
IF 10.4
Wenyan Yan,Shuyue Li,Baoqing Bai,Ying Zhang,Jinhua Zhang,Tao Bo,Qinghua Wang,Ying Gu,Yukun Yang,Shuo Wang
A MIP-modified MOF/COF hybrid nanoplatform for PEC sensing, adsorption, and photocatalytic degradation was developed. • The MOF/COF hybrid enhanced photocurrent through improved light absorption and charge separation. • The MIP layer provided high selectivity. • The platform enabled ultrasensitive PAT detection and efficient adsorption-photocatalytic degradation. Rational design of photoactive materials is essential for the sensitive detection and efficient removal of hazardous contaminants. Herein, a visible-light-responsive covalent organic framework/metal-organic framework (COF/MOF) hybrid with uniform COF layers grown in-situ on the MOF surface, followed by the introduction of a molecularly imprinted polymer (MIP) layer via a sol-gel process, was constructed for the PEC sensing, adsorption, and photocatalytic degradation of patulin. The hybrid architecture enhanced photoelectrochemical performance by facilitating charge separation and improving light harvesting. The resulting PEC sensor exhibited a wide linear range (0.1 nM-1 mM) and a low detection limit (0.055 nM), along with good reproducibility and stability in real samples. Moreover, the MIP/MOF/COF hybrid enabled efficient adsorption and photocatalytic degradation of patulin, driven by photogenerated holes and superoxide radicals. This work provides a promising strategy for the efficient and highly sensitive detection and removal of contaminants. Download: Download high-res image (236KB) Download: Download full-size image
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Jingyu Bao,Mingjie Zhou,Zuxue Bai,Yawei Xie,Xuehui Jia,Jiajun Zeng,Yujie Huang,Ruimeng Wang,Jianmin Chen,Zhaowei Jia,Liqin Zhou,Zhongxing Zhao,Jianming Pan,Jiguang Deng,Zhenxia Zhao
A photo-switchable NH 2 -AZO molecular lever exfoliates MOF and bridges COF growth. • Core-shell nanosheet couples light-triggered pore opening with heating. • It shows high CO 2 capacity (4.5 mmol/g at 298 K/1 bar) and selectivity (CO 2 /N 2 = 190). • It achieves 98% CO 2 desorption in 40 min with 75% lower regeneration energy. • Light-triggered transfer ends desorption tailing and concentrates CO 2 release. The CO 2 capture efficiency of solid adsorbents in CCS technology is largely determined by their regeneration efficiency. To achieve rapid and energy-efficient CO 2 adsorbents regeneration, emerging photothermal desorption technologies offer distinct advantages owing to their unique inside-out heating mechanism. However, current adsorbent materials often struggle to balance photothermal conversion efficiency and mass-transfer performance. The incorporation of photothermal components enhances energy conversion but tends to block or lengthen diffusion pathways, resulting in a mismatch between heat delivery and pore accessibility. Inspired by the light-regulated opening and closing of plant stomata, this study proposes a light-triggered synergistic intelligent mass-transfer strategy for efficient CO 2 capture and enhances photothermal desorption using a MOF@COF nanosheet composite. The key point of this strategy is the multifunctional photo-switch molecule NH 2 -AZO, which acts as a molecular lever. It induces the self-exfoliation of CALF-20 into nanosheets, thereby shortening diffusion pathways, and simultaneously facilitates the epitaxial growth of a COF photothermal shell. Furthermore, its reversible photoisomerization enables dynamic regulation of internal pore sizes. This on-demand opening mass-transfer mechanism, coupled with the high photothermal efficiency of the COF shell, substantially accelerates CO 2 diffusion during photothermal desorption.
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