Advanced Energy and Sustainability Research
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2024
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IF 6.2
Hong Tu,Ying Xu,Shun-shun Chen,Ya Wang,Sheng-xin Guo,Jian Wu
The high catalytic activity of photocatalysts is greatly influenced by the efficient separation of photogenerated charge carriers. In this study, six g-C 3 N 4 -based COFs are designed and synthesized, and CN-203 is identified as the most efficient photocatalyst through experimental screening. Quantitative measurements reveal that singlet oxygen production is ≈100 times that of ·O 2 − and 5000 times that of ·OH. When combined with PMS, CN-203 exhibits degradation rates for RhB and TC that are ≈30 ( k = 0.0293 s −1 ) and 10 ( k = 0.2940 min −1 ) times faster than those of CN550(RhB, k = 0.0531 min −1 ; TC, k = 0.0301 min −1 ), respectively. Structural simulations and calculations show that the modified CN-203 have better electron–hole separation in the excited state, and the energy gap between HOMO and LUMO is significantly reduced after modification. The study also revealed the structure–function relationship between the modification of the same site with different functional groups and its effect on photocatalysis. Overall, this study provides valuable insights into the relationship between surface structure and photocatalytic applications.
研究领域:
材料科学
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化学
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环境科学
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DOI
高影响因子
JOURNAL OF CHROMATOGRAPHY A
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2021
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IF 4.759
Mingming Xu,Xinying Luo,Guijiang Zhang,Bin Zhao,Shuofeng Li,Zhichang Xiao,Qiuhua Wu,Zhi Wang,Chun Wang
Food safety is a great concern of the general public. Chlorophenols (CPs) as organic pollutant can be found in drinking water and foods, causing serious harm to human health. Herein, imine-linked covalent organic frameworks (COFs), named as TAPT-AN-COF, was synthesized by aniline modulation strategy through condensation of 1,3,5-triformylphoroglucinol and 4,4′,4′'-(1,3,5-Triazine-2,4,6-triyl)trianiline with aniline as modulator. The prepared TAPT-AN-COF possesses good crystallinity and regular morphology, displaying excellent adsorption capability towards CPs pollutants. Thus, the TAPT-AN-COF was used as novel adsorbent for off-line solid-phase extraction of four CPs (2-CP, 3-CP, 2,3-CPs, 2,4-CPs) from bottled water, tea drink and honey samples before high performance liquid chromatography-ultraviolet detection. Under optimal conditions, wide linear range, low detection limits and satisfactory extraction recovery were gained. The π-stacking and hydrophobic interactions between the TAPT-AN-COF and the analytes played an important role in the adsorption. The established method has a great potential in determining other hydrophobic aromatic compounds.
研究领域:
环境科学
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分析化学
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材料科学
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食品安全
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DOI
高影响因子
MATERIALS RESEARCH BULLETIN
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2024
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IF 5.3
Changlai Li,Haoran Xie,Shijian Zhou,Hao Hu,Guangyuan Chen,Zheng Wei,Jingjing Jiang,Jinping Qin,Zewu Zhang,Yan Kong
Electron-donating group modification on covalent organic frameworks (COFs) would reasonably stimulate photocatalytic activity. However, the structure-activity relationship between the electron-donating capacity and the photocatalytic activity of electron-donating functional COFs remains greatly obscure. Herein, a series of functionalized hydrazone-linked COFs containing different electron-donating capacity groups (R-COF, R = H, Me, MeO, OH) were constructed. The results suggest that the existence of substituents with strong electron-donating capacity in R-COFs can enhance the conjugation effect and thereby accelerate the separation and transfer of photogenerated electron-hole pairs. And the stronger electron-donating capacity of groups are more favorable for the electron push-pull effect, which is beneficial for photocatalytic H 2 O 2 production. Among them, MeO-COF had the highest H 2 O 2 generation performance without sacrificial agents under air (847.9 μmol g −1 h −1 ), which is 4.95 times higher than that of H-COF. This work provides insights for the design of functionalized COFs to achieve efficient photocatalytic H 2 O 2 production.
研究领域:
材料科学
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光化学
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Li Nan Xu,Yu Xiang Liu,Ya Yuan Zhang,Na Qin,Peng Xiang,Xiong Huang,Jian Hua Chen,Qian Yang
Covalent Organic Frameworks (COFs), with their high porosity, low mass density, excellent thermal stability, and tunable structures, exhibit immense potential in the field of membrane separation. However, the porous structure of COFs and their negatively charged nature result in suboptimal performance in dye/salt separation. Tetrakis(hydroxymethyl)phosphonium chloride (THPC), a zwitterionic liquid, contains a central phosphorus atom and numerous hydroxyl groups, offering the dual optimization characteristics of balancing membrane surface charge and optimizing membrane pore structure. In this study, we first modified polyethersulfone (PES) with p-phenylenediamine to prepare an amino-functionalized NH 2 PES support membrane. Subsequently, we synthesized the COFs selective layer on the NH 2 PES surface via interfacial polymerization to obtain the COFs-NH 2 PES composite membrane. Then, we employed polyethyleneimine (PEI) to modify the COFs-NH 2 PES membrane surface through a polyelectrolyte-mediated assembly strategy, forming the PEI/COFs-NH 2 PES composite membrane. Finally, we conducted THPC modification to prepare the THPC-PEI/COFs-NH 2 PES composite nanofiltration membrane. Zeta potential analysis indicated that the surface charge of the THPC-PEI/COFs-NH 2 PES composite nanofiltration membrane was essentially neutral, favoring dye/salt separation. Dye/salt separation experiments demonstrated that the THPC-PEI/COFs-NH 2 PES composite nanofiltration membrane exhibited excellent separation performance, with a CR rejection rate and dye/salt separation factor reaching up to 99.5 % and 181.2, respectively, and a flux of 211.36 L m −2 bar -1 h −1 . Additionally, by adding THPC, the membrane surface was exposed to a greater number of hydroxyl functional groups, which improved the anti-fouling and stability of the THPC-PEI/COFs-NH 2 PES composite nanofiltration membrane over time.
研究领域:
材料科学
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环境工程
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Yunchao Ma,Yuxin Yao,Shengnan Qi,Chuanxue You,Yuanyuan Wu,Chunbo Liu,Bo Hu,Keyu Cui
Herein, we successfully synthesized two photoactive donor–acceptor (D-A) covalent organic frameworks by incorporating electric-deficient triazine and electric-rich benzotrithiophene moieties into the framework. The introduction of sulfur atom and triazine unit significantly change the intrinsic band gap of JLNU-COFs, this leads to an expanded range of light absorption, encompassing wavelengths from ultraviolet to visible. The narrow band gap of JLNU-311 allows for efficient utilization of visible light while maintaining the thermodynamic activity required for nitrogen reduction within appropriate energy bands. JLNU-311 modified with strong electron absorbing groups has higher activity to NH 3 production without co-catalyst or sacrificial agent, and yield can reach 325.6 µmol/g/h. Theoretical calculation further confirm that acceptor structure can effectively regulate the band gap width, promote the adsorption, dissociation and protonation of N 2 molecules on JLNU-COFs, and thus reduce the energy barrier of photocatalytic nitrogen reduction reaction (PNRR). Therefore, this study provides an effective strategy for design of active nitrogen fixing photocatalysts.
研究领域:
材料科学
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催化化学
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环境科学
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DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2018
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IF 6.578
Fusheng Pan,Meidi Wang,He Ding,Yimeng Song,Weidong Li,Hong Wu,Zhongyi Jiang,Baoyi Wang,Xingzhong Cao
In this study, covalent organic frameworks (COFs) are utilized as carriers to immobilize metal ions in facilitated transport membranes for organic solvent separation for the first time. SNW-1, a kind of COFs with high amount of amino groups, were loaded with Ag + ions and then incorporated into Pebax matrix to prepare hybrid membranes. Under optimal conditions, 48.11 wt% of Ag + was loaded onto SNW-1 through a facile approach, which greatly intensified the mass transfer of unsaturated penetrant molecules (thiophene) by π-complexation. The channels within SNW-1 decreased the mass transport resistance and imparted the molecular sieving ability. The organic nature of SNW-1 optimized the interfacial affinity between filler and polymer, and rendered appropriate free volume properties. The membranes displayed simultaneously enhanced permeation flux and selectivity in pervaporation gasoline desulfurization. Especially, when the content of Ag + @SNW-1 was 9 wt%, the optimum performance towards thiophene concentration of 1312 ppm under 60 °C, was achieved with permeation flux of 16.35 kg/(m 2 h) and enrichment factor of 6.8, which was increased by 78.5% and 30.0%, respectively, compared with pure Pebax membranes. In addition, the anti-swelling property of the membranes was improved and the membranes possessed superior long-term stability. This study demonstrates that COFs are superior carriers to immobilize metal ions within facilitated transport membrane for efficient liquid separation.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2026
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IF 8.8
Yanqing Qu,Jiahao Li,Xiaoyu Du,Hongge Jia,Jingyu Xu
With the acceleration of industrialization, oily wastewater poses a serious threat to the ecological environment. Membrane separation technology has emerged as a research hotspot due to its advantages of high efficiency and energy savings; however, membrane fouling significantly restricts its long term stable operation. This study introduces a 3D COFs/MXene composite membrane with photocatalytic self–cleaning capability for highly efficient oil–water separation. A well dispersed 3D COFs colloidal dispersion was prepared via oil–oil–water three phase interfacial polymerization, effectively overcoming the dispersion challenges of COFs materials. Ti 3 C 2 T x MXene nanosheets were synthesized using the LiF/HCl etching method. Using intermolecular hydrogen bonding, the two components were ultrasonically assembled, and a COFs/MXene composite membrane was fabricated via vacuum assisted filtration. The membrane exhibits excellent hydrophilicity (water contact angle as low as 54.3°) and underwater oleophobicity (underwater oil contact angle up to 144.9°). Under visible light irradiation, the MXene component generates reactive oxygen species (·O 2 − and ·OH), enabling photocatalytic degradation of oil contaminants adsorbed on the membrane surface and thereby imparting self–cleaning functionality. Separation performance tests reveal that the composite membrane achieves efficient separation of various oil–in–water emulsions, with a maximum water flux of 1918.9 L m −2 h −1 bar −1 . The flux for n –hexane emulsion increased to 2.1 times that of pure MXene membrane, while maintaining a rejection rate above 98.8%. Moreover, the membrane demonstrates excellent cycling stability and photocatalytic antifouling performance. This research offers a novel strategy for developing self–cleaning separation membranes and holds promising potential for application in oily wastewater treatment.
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DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2026
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IF 3.9
Shucheng Liu,Bo Wang,Ruiheng Lu,Hongxiang Ou,Xuan Zhang
Naringin (NRG) is a bioactive substance with important pharmaceutical and industrial value. However, the major challenges in the separation of NRG arise from the complexity and low concentration of crude extracts. In this work, by integrating the advantages of magnetic separation, MOFs@COFs composite materials, and surface molecular imprinting strategy, a new kind of magnetic MOF@COF-based boronate-affinity molecular imprinted adsorbent (NH2-MIL-68-Fe3O4@COFs@BA-MIPs) was constructed. Magnetic NH2-MIL-68 substrates were prepared by the solvothermal method, aldehyde-functionalized by surface modification with 2,4,6-triformylphloroglucinol (Tp). Then, a covalent organic framework shell was grown on the surface of substrates via the Schiff base reaction. Finally, a boronate-affinity imprinted polymer was prepared via surface-initiated atom transfer radical polymerization (SI-ATRP). The as-prepared adsorbent features rapid magnetic separation. In addition, the high-density boronate-imprinted recognition sites and porous structure endow the material with a fast adsorption rate (reaching equilibrium about 60 min), a high adsorption capacity (57.29 μmol g–1), and good retention performance (92.79%) after six adsorption–desorption cycles at 308 K under pH 8.0. Moreover, the extraction rate of crude NRG by NH2-MIL-68-Fe3O4@COFs@BA-MIPs reached 93.61%. This study provides a design strategy for constructing NRG adsorbents with rapid magnetic response and has important application value in the specific separation and purification of flavonoids.
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高影响因子
Journal of Materials Chemistry A
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2026
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IF 9.2
Jianing Tang,Jinfeng Wang,Ziang Song,Man Wang,Haitao Song,Yujun Xie,Zhen Li
Covalent organic frameworks (COFs) have emerged as promising candidates for photocatalytic hydrogen evolution due to their designable structures and tunable optoelectronic properties. Recently, while significant research efforts have focused on developing high-performance COF photocatalysts, the rational modulation of charge carrier dynamics through precise molecular structure regulation remains challenge. In this study, we addressed this by systemically tuning π-conjugation extension employing bithiazole, benzobisthiazole and naphthobisthiazole as building blocks. Theoretical calculation and experimental characterization revealed that extending the π-conjugation significantly enhances light absorption, facilitates the separation and transport of photogenerated charge carriers. As the result, the naphthothiazole based COF (NTz-TP-COF) exhibited the most efficient photocatalytic performance, achieving a superior hydrogen evolution rate of 92.3 mmol g -1 h -1 under visible light irradiation, substantially higher than its bithiazole (Tz-TP-COF, 4.7 mmol g -1 h-1 and benzobisthiazole (BTz-TP-COF, 29.15 mmol g -1 h -1 ) counterparts, as well as most previously reported thiazole-based COFs. Moreover, platinum photodeposited on NTz-TP-COF was found to exist predominantly in the metallic Pt 0 state and exhibits uniform particle size distribution, confirming the presence of abundant active sites for hydrogen evolution. These findings highlight the critical role of π-conjugation engineering in optimizing photocatalytic performance and provide a rational design strategy for highly efficient COF photocatalysts.
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Jingyang Zhou,Ningning He,Pan He,Yang Li,Lijian Ma
The “two-in-one” strategy has been widely adopted for constructing diverse covalent organic frameworks (COFs) due to its excellent solvent adaptability. However, its reliance on simple single component reactions limits access to COFs with higher complexity and functionality. Herein, we integrated multicomponent reactions (MCRs) with the “two-in-one” strategy for the first time, fabricating three dual-linkage COFs (TAPQ-COF, 2,3-DHTAPQ-COF, and 2,5-DHTAPQ-COF) featuring compressed hexagonal pore structures. The concurrent presence of imine and imidazole linkages in the COF skeletons induced distinct crystallization pathways compared to counterparts with single linkage. Crucially, hydrogen bonding was found to modulate final crystallinity by influencing crystallization pathways. When applied to Ba 2+ /Pb 2+ separation—simulating the isolation of medical radionuclide 212 Pb from 224 Ra/ 212 Pb or 228 Ra/ 212 Pb generators—the isomeric 2,3-DHTAPQ-COF significantly outperformed 2,5-DHTAPQ-COF in adsorption performance. 2,3-DHTAPQ-COF exhibited exceptional selectivity for Pb 2+ (separation coefficient β Pb/Ba up to 54.2). Experimental and theoretical evidence revealed that the enhanced selectivity originates from the enhanced coordination ability of ortho-hydroxyl groups. This work ingeniously merges MCRs with the “two-in-one” strategy, expanding the structural diversity of COFs accessible through simplified synthesis and broadening the scope of MCR applications. The superior Ba 2+ /Pb 2+ separation capability of 2,3-DHTAPQ-COF provides new insights for designing COFs targeting medical radionuclide purification.
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产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2025
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IF 9
Ziheng Li,Fengting Yao,Wenji Zheng,Xuehua Ruan,Yan Dai,Xiaobin Jiang,Xuemei Wu,Gaohong He
The performance upper bound of mixed-matrix membranes (MMMs) stems from discontinuous filler dispersion and impaired transfer kinetics. Herein, we propose to construct 3D interpenetrating covalent organic frameworks (COFs) architecture synergizing physisorption and rapid gas molecular transport to enhance CO 2 separation. Electrospun polyacrylonitrile (PAN) nanofibers induce the heterogeneous epitaxial growth of functionalized TpPa-1/TpPa-SO 3 H to create a bi-continuous transport highway with (i) 3D-interconnected micropores (∼1.8 nm) for low-resistance diffusion and physical adsorption and (ii) multi-channel chemisorption via CO 2 -philic groups (such as amino, hydroxyl, and sulfonic acid). Resultantly, the CO 2 permeability and CO 2 /N 2 selectivity of the prepared PEO/HPAN@TpPa-SO 3 H 3 MMM were improved by 32.02 % and 62.18 %, respectively, compared with the direct-blending PEO/TpPa–SO 3 H–14.90 wt% membrane. The electrospun-based nano-network assembly establishes a material paradigm for overcoming the physico-chemical adsorption-diffusion trade-off in gas separation membranes.
研究领域:
材料科学
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化学工程
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纳米技术
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环境科学
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产品关联
DOI
高影响因子
ANALYTICA CHIMICA ACTA
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2026
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IF 6.1
Zimiao Wen,Xinhua Lian,Zihan Zhang,Haiyan Zhao,Na Li,Min Cui,Cong Zhang
Insulin-like growth factor-1 (IGF-1) is a critical biomarker linked to various human diseases, necessitating sensitive and reliable detection methods. Herein, we report a novel sandwich-type ratiometric electrochemical immunosensor with signal on–off capability for the ultrasensitive measurement of IGF-1. The sensor was constructed using gold nanoparticle-engineered carbonized covalent organic frameworks (Au@C-COFs) as the sensing platform and thionine-enriched alkynyl COFs (Thi@aCOFs) as the signal amplification probe. Au@C-COFs exhibited excellent electrocatalytic activity toward hydroquinone (HQ) oxidation, providing a stable internal reference signal, while Thi@aCOFs generated a concentration-dependent reporter signal upon specific recognition of IGF-1 via the immobilized aptamer. The ratiometric strategy effectively eliminated external interferences, significantly enhancing accuracy and reliability. Under optimal conditions, the biosensor displayed a wide linear range from 10 fM to 1 nM, a low detection limit of 0.45 fM (S/N = 3), good specificity, stability, and satisfactory reproducibility. Furthermore, the sensor performed well for measuring IGF-1 in diluted human serum, achieving satisfactory recoveries. This work presents a robust and adaptable platform toward ratiometric electrochemical biosensing, holding great promise to achieve clinical diagnosis and management treatment of IGF-1-related disorders.
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DOI
高影响因子
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