ADVANCED FUNCTIONAL MATERIALS
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2025
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IF 19
Gong Cheng,Chao Sui,Weizhe Hao,Zifu Zang,Yushun Zhao,Yichen Zhou,Chenxi Zhao,Lei Wen,Junjiao Li,Yuna Sang,Xiaodong He,Chao Wang
Smart composite materials are attracting increasing attention for their novel stimulus-response characteristics. Among them, Cellulose nanofibers (CNF)-based smart composites are widely used due to their excellent properties. For enhancing the response rate and stability of CNF-based smart composite actuator, a novel covalent organic framework (COF) nanoparticle is synthesized via molecular design to enhance CNF-based multi-responsive composite materials. COF-TASA, characterized by a high specific surface area, exhibits the highest photothermal conversion efficiency of 79.9% for COF materials to date. A multi-stimuli responsive actuator is prepared through the compounding of COF-TASA, CNF, and polyvinylidene fluoride (PVDF). The smart membrane demonstrates a reversible ability to change shape when exposed to near-infrared (NIR) light and humidity. This is caused by the asymmetric deformation of the COC and PVDF layers. Finally, the mechanism for the enhancement of the smart response rate of the system by COF-TASA is successfully elucidated through experiments and molecular dynamics (MD) simulations, indicating that the introduction of COF forms ordered channels in the COC, greatly enhancing the specific surface area and the transport speed of water molecules. This COF-enhanced smart actuator is anticipated to provide important solutions for smart control, smart detection, and environmental energy collection.
研究领域:
材料科学
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智能材料
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DOI
高影响因子
Journal of Physical Chemistry Letters
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2026
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IF 4.5
Ziyu Liu,Xin Wen,Chenqi Yi,Zongsong Gan
Crystallization of covalent organic frameworks (COFs) is fundamentally limited by the high activation energies and slow bond-exchange dynamics of imine linkages, rendering solvothermal synthesis intrinsically sluggish (hours to days) and difficult to control. Here, we report a nonequilibrium crystallization strategy in which a 473 nm continuous-wave laser creates a confined photothermal microreactor at the solid–liquid interface. Gaussian focusing generates microsecond local hotspots and steep temperature gradients, producing instantaneous supersaturation in the focal region and driving dynamic covalent exchange into an ultrafast, far-from-equilibrium regime. As a result, COF-300 nucleates and grows in situ within seconds, without catalysts and with submicrometer spatial confinement. Laser power and exposure provide real-time, deterministic control over nucleation and crystal growth, enabling the on-demand, in situ integration of COF microcrystals. Moreover, the highly localized photothermal pathway allows direct laser writing of ordered COF microstructures without transfer or postprocessing. This work establishes an accessible nonequilibrium synthesis route for dynamic covalent materials and offers a generalizable strategy for rapid, programmable crystallization toward integrated photonic architectures.
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DOI
PubMed
高影响因子
Biotechnology for Biofuels
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2021
·Vol. 14
·期 1
·1-12
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IF 6.04
Zhou Zi-Wen,Cai Chun-Xian,Xing Xiu,Li Jun,Hu Zu-E.,Xie Zong-Bo,Wang Na,Yu Xiao-Qi
Background Production of biodiesel from renewable sources such as inedible vegetable oils by enzymatic catalysis has been a hotspot but remains a challenge on the efficient use of an enzyme. COFs (Covalent Organic Frameworks) with large surface area and porosity can be applied as ideal support to avoid aggregation of lipase and methanol. However, the naturally low density limits its application. In this work, we reported a facile synthesis of core–shell magnetic COF composite (Fe 3 O 4 @COF-OMe) to immobilize RML ( Rhizomucor miehei lipase), to achieve its utilization in biodiesel production. Result This strategy gives extrinsic magnetic property, and the magnetic COFs is much heavier and could disperse in water medium well, facilitating the attachment with the enzyme. The resultant biocomposite exhibited an excellent capacity of RML due to its high surface area and fast response to the external magnetic field, as well as good chemical stability. The core–shell magnetic COF-OMe structure not only achieved highly efficient immobilization and recovery processes but also maintained the activity of lipase to a great extent. RML@Fe 3 O 4 @COF-OMe performed well in practical applications, while free lipase did not. The biocomposite successfully achieved the production of biodiesel from Jatropha curcas Oil with a yield of about 70% in the optimized conditions. Conclusion Magnetic COFs (Fe 3 O 4 @COF-OMe) for RML immobilization greatly improved catalytic performance in template reaction and biodiesel preparation. The magneticity makes it easily recovered and separated from the system. This first successful attempt of COFs-based immobilized enzyme broadened the prospect of biodiesel production by COFs with some inspiration.
研究领域:
生物化学
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材料科学
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可再生能源
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DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Shenghan Ji,Ziheng Li,Yan Dai,Xiaobin Jiang,Xuehua Ruan,Wenji Zheng,Gaohong He
MOF membrane supported on flexible substrates faces the issues of non-selective defects as well as poor mechanical compatibility. Herein, a “rigid and flexible” MOF/COF molecular sieving membrane is acquired by the in-situ polymerization of COFs among the inter-crystalline and interfacial defects in the MOF membrane. Taking advantage of different osmotic pressures on both sides of MOF membrane during the counter-diffusion process, the COFs monomers diffuse from bottom to top to the inter-crystalline and interfacial defects and meet with the catalyst for further polymerization and crystallization, thus repairing non-selective defects of the MOF membrane. In the MOF/COF membrane, COFs exhibit a strong adsorption affinity for CO 2 , which can slow down CO 2 permeation and enhance H 2 /CO 2 selectivity. Meanwhile, the in-situ polymerization of COFs primarily occurs at the inter-crystalline defects of MOF membrane and the interface between MOF membrane and polymer substrate, without forming a resistance layer on MOF membrane surface, which is demonstrated by the SEM and AFM results. Additionally, the counter-diffusion growth of COFs allows for the connection between the organic substrate and the inorganic MOFs layer through COFs, thereby improving the mechanical flexibility of MOF membrane confirmed by the mechanical properties. Besides, through regulating the polymerization process of TpPa-1 including time and monomer concentration, the H 2 /CO 2 separation of ZIF-67/TpPa-1 membrane can be tuned precisely. Therefore, the ZIF-67/TpPa-1–0.90 membrane at a polymerization time of 24 h presents H 2 permeance of 1114 GPU and H 2 /CO 2 selectivity of 17.52, an increase of 178.1 % compared to the pure ZIF-67 membrane, which is far beyond the 2008 upper bound and approaching the up-to-date data line. Together with the additional good mechanical properties, stability and universality, the proposed “rigid and flexible” MOF/COF molecular sieving membrane is promising in H 2 /CO 2 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
TALANTA
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2023
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IF 6.1
Qiong He,Ying Chen,Yuyang Liu,Qiang Wang,Chiyang He,Shaorong Liu
Large–size spherical sorbents with particle size of 10–50 μm are widely applied in separation fields, however it is still a great challenge to synthesize such large–size spherical covalent organic framework (COF). In this work, a type of large–size porous 3D COF was size–controablly synthesized via a two–step strategy, in which a large–size porous 3D spherical polymer was prepared first through a Pickering emulsion polymerization using nano silica as the stabilizer, and subsequently it was converted into porous spherical 3D COF by a solvothermal method . The as–prepared porous spherical COF (COF–320 as a model) showed size–controllable uniform spherical morphology within 15–45 μm, large specific surface area, fine crystalline structure, and good chemical stability. When used as the sorbent for dispersive solid–phase extraction (d–SPE) of bisphenol F (BPF), the porous spherical COF–320 (15 μm) displayed high adsorption capacity ( Q max = 335.6 mg/g), high enrichment factor (80 folds), and good reusability (at least five cycles). By coupling the d–SPE method to HPLC, a new analytical approach was developed and successfully applied to the determination of trace BPF in two water samples, an orange juice and a standard sample with recoveries of 96.0–102.2 % (RSD = 1.1–1.5 %), 95.7–97.4 % (RSD = 1.4–4.4 %) and 98.7 % (RSD = 2.3 %), respectively. The limit of detection (S/N = 3) and limit of quantification (S/N = 10) were 0.1 and 0.3 ng/mL, respectively. The new synthesis strategy opens a viable way to prepare large–size porous spherical COFs, and the developed analytical method can be potentially applied to sensitively detect the trace BPF in water samples and beverages.
研究领域:
材料科学
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分析化学
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DOI
PubMed
高影响因子
ACS Applied Nano Materials
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2023
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IF 5.9
Yinsheng Liu,Hao Guo,Ning Wu,Liping Peng,Mingyue Wang,Jiaying Tian,Jiaxi Xu,Wu Yang
Tetracycline (TC) abuse has caused a serious threat to human health and the ecological environment, so it is very important to develop the materials that can simultaneously detect and remove TC in animal feed and environmental water. In this present work, at first, an original oxygen-rich 2D nanoporous covalent organic framework (BrPz-COF) was synthesized by an irreversible condensation reaction of tetrabromo-1,4-benzoquinone and piperazine and then a rare-earth covalent organic framework (Ln@COF) was successfully obtained for the detection and removal of tetracycline by post-synthesis modification. The carbonyl group contained in BrPz-COF provides a large number of active sites for the binding of Eu3+ ions by post-synthetic modifications so that the resulting Eu3+@BrPz-COF hybrid shows a good chemical stability under harsh chemical conditions such as strong acid, strong base, and various organic solvents. The resulting Eu3+@BrPz-COF exhibited a turn-on response toward tetracycline, which allowed this interesting material to be applied as a fluorescence sensor. It is worth mentioning that the reusable sensor had a high sensitivity and excellent selectivity to TC, and the detection limit was 7 nM, which can be applied to detect TC in animal feed. In addition, Eu3+@BrPz-COF also showed a good performance in the removal of TC with the maximum adsorption amount of 205.34 mg·g–1. Metal-COF-based hybrid materials with the performances of simultaneous detection and removal of TC are rare, so this work is very significant for developing a material to solve this matter.
研究领域:
环境科学
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材料科学
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生物化学
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DOI
高影响因子
Materials Today Communications
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2023
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IF 3.8
Ye Jia,Donghai Zhu,Qifan Yang,Xu Liu,Zahra Gholami,Mohammadtaghi Vakili,Shuangxi Zhou,Wei Wang
The presence of mercury (Hg(II)), a highly toxic pollutant in the aquatic environment, motivates researchers to use an effective method to remove it from water. Herein, we synthesized COF-TAZ and COF-TOE via post-modification with 3-mercapto-1,2,4-triazole and 4-(methylsulfanyl)thiophenol to form triazole group and methylthio group, respectively, and followed by characterization with SEM, FTIR, and XRD, etc. The adsorption behaviors of Hg(II) on two modified COFs were evaluated by adsorption kinetic models using the pseudo-first order, pseudo-second order and intra-particle diffusion models, as well as isotherm models, i.e., Langmuir and Freundlich models. COF-TAZ and COF-TOE manifested maximum experimental uptake capacity of 108.09 mg g −1 and 104.85 mg g −1 , respectively. Notably, COF-TAZ exhibited commendable binding selectivity towards Hg(II) and displayed a good recycling ability, with a removal percentage still above 90% after five cycles. Especially, the adsorption mechanisms of COF-TAZ and COF-TOE were clarified by FTIR, XPS and DFT calculations, suggesting that electrostatic interaction and chelation were involved in the adsorption process . This study shows that functionalized COFs have good application prospects in effective removal of heavy metals in water.
研究领域:
环境科学
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材料科学
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化学工程
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DOI
高影响因子
Advanced Science
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2021
·Vol. 8
·期 19
·2101884
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IF 16.806
Meng-Yao Zhang,Jun-Kang Li,Rui Wang,Shu-Na Zhao,Shuang-Quan Zang,Thomas C. W. Mak
Recently, novel core–shell MOF@COF hybrids display excellent performance in various fields because of their inherited advantages from their parent MOFs and/or COFs. However, it is still a grand challenge to adjust the morphology of MOFs and/or COFs for consequent performance improvement. Herein, a Ti-MOF@TpTt hybrid coated with ultra-thin COF nanobelt, which is different from the fibrillar-like parent COF, is successfully synthesized through a sequential growth strategy. The as-obtained Pd decorated Ti-MOF@TpTt catalyst exhibits much higher photocatalytic performance than those of Ti-MOF, TpTt-COF, and Ti-MOF@TpTt hybrids with fibrillar-like COF shell for the photocatalytic cascade reactions of ammonia borane (AB) hydrolysis and nitroarenes hydrogenation. These can be attributed to its high BET surface area, core–shell structure, and type II heterojunction, which offers more accessible active sites and improves the separation efficiency of photo-generated carriers. Finally, the possible mechanisms of the cascade reaction are also proposed to well explain the improved performance of this photocatalytic system. This work presents a constructive route for designing core–shell MOF@COF hybrids with controllable morphology adjustment of COF shell, leading to the improved photocatalytic ability to broaden the applications of MOF/COF hybrid materials.
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DOI
高影响因子
MATERIALS LETTERS
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2017
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IF 2.572
Rui Xue,Hao Guo,Ting Wang,Xiao Wang,Jiebing Ai,Liguo Yue,Yuli Wei,Wu Yang
A new covalent organic framework material (NWNU-COF-1) with hexagonal honeycomb-like structure linked by NH bond was synthesized by the condensation reaction of melamine and 2,4,6-trichloro-1,3,5-triazine and its structure and properties were characterized by Fourier transform infrared spectra (FT-IR), powder X-ray diffraction (XRD), thermogravimetric analysis (TGA), N 2 adsorption-desorption, X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM). The BET specific surface area of NWNU-COF-1 is 301.149 m 2 g −1 , and the pore size is about 1.41 nm, and the preparation is simple and cheap. This material is expected to be used in the field of electrode materials of supercapacitor and adsorbent materials.
研究领域:
材料科学
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化学
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DOI
高影响因子
JOURNAL OF CHROMATOGRAPHY A
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2016
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IF 3.926
Tao Bao,Pingxiu Tang,Deying Kong,Zhenkun Mao,Zilin Chen
Covalent-organic frameworks (COFs) are attractive materials for their fascinating properties, such as rigid structures, exceptional thermal stabilities, low densities, and permanent porosity with specific surface areas, which indicate potential for application in chromatography similar to related metal-organic frameworks (MOFs). However, the utilization of COFs in analytical chemistry is far behind as compared to that of the MOFs due to the challenging work of their immobilization. Here, we have successfully demonstrated the growth of the boron COF-5 on the inner wall of the fused silica capillary by a developed polydopamine-supported method. Combined with the layer-by-layer strategy, multilayer COF-5-coated capillary was obtained. The formation of COF-5 on polydopamine-coated substrate has been confirmed by scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray diffraction. A novel stationary phase of COF-5 was developed on the basis of successful growth of COF-5 on polydopamine for open-tubular capillary electrochromatography (OT-CEC). Baseline separation of neutral, acidic and basic analytes was achieved on multilayer COF-5-coated capillary column. The fabricated capillary columns showed high column efficiency (154,060 plates/m for methylbenzene), excellent stability and repeatability. The precision (relative standard deviation (RSD), n = 3) of retention time, peak height, and peak area for tested neutral compounds were in the range of 1.2–1.3%, 1.8–4.2%, and 0.9–2.4%, respectively. To the best of our knowledge, it was the first demonstration that COF-5 was developed as a novel stationary phase.
研究领域:
分析化学
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材料科学
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DOI
PubMed
高影响因子
POLYMER INTERNATIONAL
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2021
·Vol. 71
·期 1
·38-46
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IF 2.99
Heping Wang,Bang Feng,Qianwen Zhang,Qiang Du,Qiuhong Bai,Cong Li,Yehua Shen
For the first time, a novel amidinothiourea-linked covalent organic framework (COF) (TpAt) has been successfully synthesized by the condensation between 1,3,5-triformylphloroglucinol and amidinothiourea via vacuum solvothermal reaction, and was further utilized for the adsorption of metal ions from aqueous solution. The effects of initial concentration, pH and contact time on the adsorption process were investigated. As a result, the TpAt COF showed maximum binding capacities as high as 95.44, 100.76 and 99.08 mg g –1 for Cr(III), Cd(II) and Cu(II) within 180 min at the initial concentration of 100 mg L –1 , respectively. The isotherms of metal ions onto TpAt could be described by the Freundlich isotherm equation, and the adsorption kinetics followed the pseudo-second-order model. The TpAt could be reused for more than five adsorption–elution cycles, whilst basically maintaining its original adsorption performance and the structural integrity of the COF layers. The robust adsorption efficiency can be attributed to the coordination between metal ions and N, O and S atoms in the TpAt framework. The TpAt COF represents an ideal candidate for the removal of heavy metal ions in environmental pollution treatment. © 2021 Society of Industrial Chemistry.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
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2026
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IF 7.9
Mingsheng Wang,Yunjie Chen,Yanghui Wen,Xiaomei Liu,Chang He,Yi Liu,Minghui Pan,Chao Pang,Hua Li
To overcome biliary stent failures caused by biofilm formation, bile sludge accumulation, and tumor-mediated restenosis, we designed a self-polishing, biodegradable coating by flame-spraying poly(L-lactic acid)/thermoplastic polyurethane (PLLA/TPU) composites incorporated with 5-fluorouracil-loaded covalent organic frameworks (5-FU@COF). This strategy integrates: 1) Programmable self-polishing via synergistic PLLA ester/urethane bond hydrolysis and pH-sensitive COF delamination, ensuring controlled erosion; 2) Mechanoadaptive reinforcement, where 5-FU@COF enhances coating-substrate adhesion by 111% (10FCLU: 3.19 MPa vs. LU:1.51 MPa) through COFs rigid filler anchoring and stress homogenization; and 3) Dual anti-biliary sludge accumulation/tumoricidal therapy enabled by 216.5 nm COF nanospheres achieving 43.1% 5-FU loading. The coatings resist biofouling via electrostatic repulsion and dynamic polishing, reducing bile salt coverage to 11.53% (vs. 47.44% on bare Ti). Biphasic 5-FU release from 10FCLU coating achieves 92.6% tumor Cholangiocarcinoma cell (RBE) inhibition for 3 days, validated by TEM ultrastructural apoptosis markers (nuclear fragmentation; mitochondrial collapse) and Korsmeyer-Peppas release kinetics. This multifunctional drug-loading coating enables next-generation biliary stents with sustained patency.
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高影响因子
危险品化学品经营许可证（带存储）