CHEMICAL ENGINEERING SCIENCE
·
2024
·
IF 4.1
Qinghua Qu,Yuqiao Jiang,Linyan Cheng,Qingyuan Xue,Ranran Li,Cheng Fang,Hongping Li,Jing Ding,Hui Wan,Guofeng Guan
Covalent organic frameworks (COFs) with high specific surface area, ordered pore wall, modified porous surface and customizable chemical structure have been widely used in CO 2 capture. However, the screening of functionalized COFs suitable for CO 2 capture still relies on experiments, which will require a long experimental period with blindness and randomness. Herein, we chosed three electron withdrawing groups (–NO 2 , –CN and −Br) and three electron donating groups (–CH 2 NH 2 , –CH 3 , –OCH 3 ) to explore the effect of electron withdrawing ability of functional groups on the CO 2 adsorption capacity. Grand canonical Monte Carlo (GCMC) method was used to simulate the adsorption capacity of CO 2 over X-TpBD-COFs (X=–NO 2 , –CN, −Br, –CH 2 NH 2 , –CH 3 , –OCH 3 ). As the result, NO 2 -TpBD-COF had the highest adsorption capacity among the six functionalized X-TpBD-COFs at 100 kPa and 25 ℃ (49.37 cm 3 /g), while OCH 3 -TpBD-COF had the lowest adsorption capacity among them (23.51 cm 3 /g at 25 ℃ and 100 kPa). The order of binding energy was basically the same as the order of adsorption capacity when the synergistic interactions between functional groups and oxygen atoms in Tp were considered according to density functional theory (DFT). Molecular dynamics (MD) showed that the diffusion and distribution of CO 2 were mainly effected by pore structures. To verify the simulation results, NO 2 -TpBD-COF and OCH 3 -TpBD-COF were successfully prepared by solvothermal method. The CO 2 adsorption capacities of these two COFs were basically consistent with the conclusion obtained by the simulations. This study provided a way for simulation to guide accurate and rapid experimental design of COF materials for CO 2 capture.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Molecular Catalysis
·
2024
·
IF 3.9
Yongxin Zhang,He Li,Zhongliang Shi,Miao Guo,Yanming Hu,Guangyuan Zhou
Total hydrogenation of furfural (FAL) is an efficient way to produce the industrially important tetrahydrofurfuryl alcohol (THFOL). However, it is a challenge to obtain highly selective catalysts for this transformation especially under mild reaction conditions. Herein, we report that the β-ketoenamine-linked covalent organic framework (TpBD COF) supported ultrafine Pd nanoparticles exhibit significantly enhanced selectivity for THFOL compared to Pd/C (95% vs. 82 %) at almost full FAL conversion. This heightened selectivity is attributed to the increased electronic density on the Pd surface, resulting from the electron-donating effect of pendant groups in the TpBD COF. Moreover, kinetic investigations reveal that the activity of total FAL hydrogenation on Pd surface is linked to the rate-determining step in its first C = O hydrogenation process. Additionally, Pd/TpBD COF could catalyse various other bio-based furanic compounds to the corresponding furan ring saturated products in high yields. This work provides guidance for the rational design catalysts to improve its tandem hydrogenation efficiency.
研究领域:
化学工程
·
催化科学
✓ 已验证
产品关联
DOI
高影响因子
DESALINATION
·
2024
·
IF 8.3
Lin Yu,Jia-Yue Dai,Zhen-Liang Xu,Yin-Xin Fang,Rui Jia,Yong-Jian Tang
Covalent Organic Frameworks (COFs) composite nanofiltration (NF) membrane has high permeation flux and rejection. However, the reaction rate of COFs is relatively slow. Adding acid catalyst is a common method to shorten reaction time. However, the dissatisfactory synthesis rate will lead to irregular structure of COFs materials. In this work, it is the first time to use organobase as a catalyst to prepare COFs composite membrane. The COFs structure will be optimized and the membrane performance can be enhanced. The prepared TpPa-PIP membrane compared with acid catalyzed TpPa-HAc membrane has better permeability, permeance of 89 L m −2 ·h −1 ·bar −1 and CR rejection of 99.54 %. This improvement is because of the TpPa-PIP intermediate made slower reaction speed that improves the overall regularity and crystallinity of COFs. Therefore, it is better method for broadening the application of organobase-catalyzed in preparing membranes.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2025
·
IF 9.8
Haiyan Zhao,Yunzhi Zhao,Shanshan Li,Meiya Zhang,Na Li,Min Cui,Cong Zhang
Kanamycin (KAN), a veterinary antibiotic, often leads to residue pollution in food, thereby threatening human health. Therefore, we established a dual-signal ratiometric electrochemical aptasensor for KAN detection in food. Herein, a ferrocene-functionalized COFs-derived Fe/N-doped porous carbon was synthesized and served as splendid electrode material to generate amplified electrocatalytic signal toward hydroquinone (HQ). Tetrahedral DNA-supported aptamer probes were employed to improve binding affinity and reduce nonspecific adsorption. Methylene blue-enriched COFs (MB@SA-COFs) were designed as another signal tag to generate an effective MB signal. With the recognition of KAN, the MB@SA-COFs would detach from electrode surface, inducing a decreased MB signal and decreased resistance, thereby causing an increased HQ signal. The signal on-off mode was conducive to mitigating environmental interference through self-calibration. Consequently, the aptasensor showed a wide linear range and a low detection limit for KAN detection. Satisfactory applicability was observed in milk samples, demonstrating its practicability for food safety monitoring.
研究领域:
分析化学
·
食品安全
·
生物传感器
·
分子识别
·
环境监测
·
药物残留检测
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2024
·Vol. 14
·期 29
·21151-21157
·
IF 3.9
Jianwei Yang,Xianghao Han,Xiao Feng
As an emerging category of crystalline porous materials, covalent organic frameworks (COFs) are primarily synthesized via solvothermal methods. However, achieving rapid synthesis of COFs through this approach poses a significant challenge. To address the issue of slow synthesis, we studied the crystallization process of aminal-linked COFs via the condensation of a cost-effective aldehyde and secondary amine, and successfully expedited the synthesis of COFs within a one-hour duration. Furthermore, gram-scale aminal-linked COFs with abundant ultra-microporous channels demonstrated promising potential for CO2/CH4 separation. This study enables the rapid synthesis of aminal-linked COFs from cheap raw materials, which lays a foundation for their practical applications.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2021
·
IF 4.821
Yuhang Gao,Chenxi Zhao,Qiyue Tan,Mingkun Gao,Ge Chen,Rongqi Zhai,Xiaodong Huang,Xiaomin Xu,Guangyang Liu,Jing Wang,Yaowei Zhang,Donghui Xu
In this study, a magnetic composite material was prepared based on covalent organic framework (COFs) materials for the detection of trace organophosphorus pesticides . Fe 3 O 4 @C 3 N 4 @COFs were synthesized by a layer-by-layer assembly strategy and applied to the selective identification, detection and removal of profenofos pesticides using magnetic solid-phase extraction technique. After seven regeneration cycles, the composite exhibited excellent selectivity and affinity for profenofos, and eventually still achieved an extraction efficiency higher than 75%. Under optimized conditions, the proposed magnetic solid-phase extraction method coupled with high-performance liquid chromatography-tandem mass spectrometry showed a low limit of detection (1 × 10 −5 μg/mL) for profenofos. The developed method was successfully used to detect profenofos in spiked fruit samples with satisfactory recoveries (74.33% −116.59%) and relative standard deviations (0.27% −7.41%). This study highlights the potential of COFs-based magnetic composites in sample pretreatment for targeted analysis and is a novel pathway for efficient sample preparation in food safety analysis.
研究领域:
分析化学
·
食品安全
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2025
·
IF 9.5
Xu-Qin Ran,Can Zhu,Qian-Ying Mao,Shu-Ting Xu,Shuangping Liu,Peng Gu,Yun Jiang,Xiu-Ping Yan,Hai-Long Qian
Advancements of covalent organic frameworks (COFs) in the field of adsorption and extraction are always limited by their non-uniform and irregular aggregated morphology. Herein, we pioneer the preparation of monodisperse COFs with regular shape and further explore their adsorption and extraction capability. As proof of concept, a new monodisperse fluorinated 3D COF named as M-TAM-TFTA, featuring a nonpolar structure and uniform size and shape, is selected as the model COF for adsorption and extraction of perfluorocarboxylic acids (PFCAs). M-TAM-TFTA, consisting of tetra(4-anilyl)methane and 2,3,5,6-tetrafluoroterephthalaldehyde, exhibits larger adsorption capacity (554.9 mg g-1) and faster adsorption kinetics (5 min) compared to the same composition aggregated 3D COF A-TAM-TFTA as well as diverse reported materials. This remarkable adsorption performance of M-TAM-TFTA for PFCAs is proved to be dominantly caused by its lower mass transfer resistance structure and multiple specific interactions including F-F, hydrophobic, electrostatic and H-bonding interactions. The M-TAM-TFTA is further applied to develop a probe nanoelectrospray ionization mass spectrometry (PESI-MS) method for direct and precise determination of PFCAs with a wide linear range (0.5 - 5000 ng L-1) and low limits of detection (0.08 - 0.46 ng L-1). This study provides robust support for the great potential of monodisperse COF as adsorbent for treatment of contaminant in complex samples.
研究领域:
材料科学
·
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Dongxue Feng,Yuxin Zhou,Yao Tong,Jian Yang,Jinlou Gu
The assembly of covalent organic frameworks (COFs) in enzyme-compatible media is highly desirable yet challenging. Herein, we proposed an electron donor–acceptor (EDA)-complex-assisted strategy for the aqueous ambient construction of β-ketoenamine COFs under additive-free condition simultaneously with the in situ encapsulation of enzymes. EDA complexes, formed by an electron-rich 2,2′-bipyridine-5,5′-diamine (Bpy) with electron-deficient 1,3,5-triformylphloroglucinol (Tp), prearranged monomers in specific orientation and significantly lowered the reaction activation energy, thus enhancing the error correction and yielding highly crystalline TpBpy COFs. Beyond affording a protective scaffold, the Bpy units within COFs also served as anchoring sites for the chelation of various metallic ions to establish biomimetic enzymatic centers. On this basis, a spatially coupled nanoreactor was designed by encapsulating the natural creatinine deiminase (CD) followed by biomimetic laccase (Bpy-Cu) installation within COFs. The product generated by the encapsulated CD activated the neighboring Bpy-Cu within the adjacent pores, creating a proximity-induced cascade amplification and enabling the entire cascade to respond specifically to one of the key chronic kidney disease (CKD) biomarkers of creatinine. The constructed detection platform exhibits a wide linear range, with a detection limit as low as approximately 7.7 μM. This platform can provide valuable supporting information for the assessment of kidney function and holds promise for applications in the early screening and disease course monitoring of CKD. By simply altering the encapsulated natural enzymes and biomimetic active sites, this modular and generalizable platform is expected to offer a promising tool for early diagnosis of various diseases.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Mengya Lv,Xiaoming Wen,Lingbo Ji,Chen Chen,Hongliang Lu,Jufang Hao,Yifan Hu,Qidong Zhang,Mingfu Zhu,Ronghan Wei,Qiyan Wang
Surface-enhanced Raman spectroscopy (SERS) relies on the formation of precise and stable plasmonic nanogaps to achieve high sensitivity and reproducibility. However, the dynamic nature of plasmonic nanoparticles often leads to uncontrolled nanogap fluctuations, limiting SERS signal stability. Here, we present a novel strategy for stable plasmonic nanogap engineering by employing covalent organic frameworks (COFs) to confine the motion of Au nanoparticles at the nanoscale. The porous and rigid structure of COFs effectively restricts nanoparticle mobility, ensuring the formation of well-defined and fixed plasmonic nanogaps. Time-resolved studies demonstrate that COFs-modified Au nanoparticles exhibit a highly stable SERS signal, with only 37.5 % intensity fluctuations, whereas bare Au nanoparticles undergo significant blinking, leading to an 82.8 % signal loss over 300 s. This confinement strategy not only contributes to enhancing SERS signal stability but also holds promise as a platform for ultrasensitive molecular detection, biosensing, and in situ chemical analysis, offering potential insights for the development of precisely engineered nano-plasmonic sensing systems.
研究领域:
分析化学
·
纳米生物技术
·
生物传感器
·
分子诊断
·
转化医学
✓ 已验证
产品关联
DOI
高影响因子
Molecular Catalysis
·
2025
·
IF 4.9
Xiaojie Wu,Shibing Wu,Run Wang,Mingyue Chen,Jiang Liu,Xilong Yan,Yang Li,Bowei Wang,Ligong Chen
The planarity of covalent organic frameworks (COFs) is a critical structural parameter for their photocatalytic performance. However, its influence on the efficiency of photocatalytic organic transformations has not been fully investigated. Herein, three β -ketoenamine COFs with different planarity, denoted as TP-EDDA-COF, TP-DATP-COF, and TP-DMTP-COF, were synthesized to explore the influence of planarity on their photocatalytic performance. With the best planarity, TP-EDDA-COF exhibited a superior visible-light absorption range and photogenerated carrier separation and migration efficiency. Therefore, it demonstrated exceptional photocatalytic performance, with conversions reaching 98 % for the dehydrogenation of tetrahydroquinoline (THQ) and 99 % for the oxidative coupling of benzylamine (BA). Furthermore, TP-EDDA-COF also exhibited excellent substrate scope and recyclability. Comprehensive material characterization and theoretical calculations revealed that the enhanced planarity significantly facilitated charge separation and migration, thereby leading to improved photocatalytic efficiency. This study deepens the understanding of structure-activity relationships for COF photocatalysts, and provides a theoretical foundation for the rational design of high-performance photocatalysts for aerobic reactions.
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Wenyan He,Siyan Xu,Kaijie Ye,Yinuo Dan,Moli Chen,Jia He,Xiaolong Shi
The removal of sterically hindered diethylenetriamine penta(methylene phosphonic acid) (DTPMP) from wastewater is challenging because its bulky molecular architecture impedes both intraparticle diffusion and effective coordination with conventional adsorbents. To address this limitation, a cooperative dual-functional covalent organic framework (Fe–NH 2 /COF 4 ) was synthesized via sequential Fe incorporation followed by nitro-to-amine reduction. The resulting material exhibits a high specific surface area of 501.6 m 2 /g and a well-matched pore size of 17.16 Å, closely aligning with the DTPMP molecular dimension (∼15.7 Å). Under the optimized conditions, Fe–NH 2 /COF 4 achieves a removal efficiency of 93.85% and an adsorption capacity of 338.2 mg/g, reducing effluent total phosphorus to below 0.5 mg/L (the Grade 1 A discharge standard). Mechanistic investigations, including experiments and DFT calculations (adsorption energy: −1.07 eV), reveal synergistic contributions from Fe–phosphonate coordination, electrostatic attraction, and hydrogen bonding. Molecular dynamics simulations confirm rapid intrapore diffusion (D = 5.7 × 10 −7 cm 2 /s). The adsorbent demonstrates good reusability (82% capacity retention after five cycles) and remarkable robustness against coexisting ions and humic acid (HA), retaining an adsorption capacity of 332.5 mg/g even in simulated wastewater. Collectively, these findings establish a steric-hindrance-resistant adsorption paradigm and provide rational design guidelines for dual-site COF adsorbents targeting refractory organophosphorus pollutants.
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Zhipeng Zhang,Xiansong Shi,Xingyuan Wang,Zhe Zhang,Yong Wang
Efficient capture and storage of radioiodine are of great importance for developing nuclear energy and tackling nuclear waste, which however remain challenging due to the scarcity of powerful materials. In this work, we rationally design and fabricate a hybrid material by encapsulating covalent organic frameworks (COFs) into ultralight cellulose aerogels for efficient iodine (I 2 ) capture. Two kinds of functionalized cellulose precursors that can be covalently cross-linked are synthesized. Solvothermally synthesized COF particles with a uniform diameter of ∼ 500 nm are then introduced into the precursors followed by freeze drying to produce hybrid aerogels. With the presence of rich and ordered micropores afforded by COFs, these highly porous aerogels exhibit excellent organic solvent absorption performances and high uptake capacities toward solvent-dissolved and vaporized I 2 . More importantly, in view of the processable and robust structure, we realize the shaping of hybrid aerogels into aerogel columns to effectively capture I 2 vapor and I 2 solute in continuous operations. Therefore, this work not only provides a new way to shape COF materials but also could inspire the design of viable platforms for high-performance I 2 capture.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）