JOURNAL OF HAZARDOUS MATERIALS
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2021
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IF 10.588
Ruiqi Liu,Qian Yan,Yumeng Tang,Rui Liu,Lijin Huang,Qin Shuai
The preparation of hierarchical porous covalent organic frameworks (HP-COFs) is of great significance due to their inherent porosity and low density. However, it is still very challenging owing to the poor machinability of COFs. Herein, a simple and cost-efficient strategy for the synthesis of HP-COFs was proposed. In particular, p -toluenesulfonic acid and NaCl, both of which can be recycled, are utilized as catalyst and template, respectively. The resulting HP-TpBD-900 featuring abundant macropore and mesopore as well as large specific surface area (~700 m 2 g -1 ) possessed self-floating ability and was turned out to be a promising adsorbent for the efficient removal of sulfamerazine (SMR) in aqueous solution. The maximum adsorption capacity is 168 mg g -1 , which is more than twice in comparison to that of material prepared without NaCl template. In addition, no significant decrease in adsorption capacity was observed after 5 cycles. Furthermore, the density functional theory (DFT) method was utilized to elucidate the adsorption mechanism, which could be dominated by hydrogen bonding and C-H···π interaction. This work not only provides a new strategy for the synthesis of HP-COFs, but also contributes to boosting the application of COFs in the field of wastewater treatment .
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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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2023
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IF 15.1
Shuming Wu,Yanwei Li,Tinghong Wang,Hao Li,Xinna Wang,Lijuan Ma,Nazhen Zhang,Penghan Yue,Yanhui Li
In this work, amide bonds linked 2D porphyrin-based covalent organic framework (Por-PD-COF) was designed and synthesized through condensation reaction between meso -tetrakis ( p -carboxyphenyl) porphyrin (TCPP) and para -phenylenediamine (PD). Large surface area, abundant active sites and good stability of Por-PD-COF made it can quickly and efficiently absorb methylene blue (MB) selectively and remove it from aqueous solution. More importantly, in different mixture of organic dyes including RhB and MB, MB and MO, Por-PD-COF can selectively adsorb MB with a large adsorption capacity (328.57 mg·g −1 ), while a little MO and hardly RhB because of the unique charge selectivity and specific pore size. Especially in the mixture solution of MO and MB, compatitive adsorption appeared, MB can substitute the adsorbed MO on the active sites in the channel of Por-PD-COF. Furthermore, with the band gap narrow to 1.02 eV, Por-PD-COF could be used as efficient photocatalyst to degrade MB (99%, 180 min) directly under visible light irradiation, and can be reused for four times with almost no absorptive and photocatalytic capacity losing. The possible adsorption and photocatalytic mechanisms of Por-PD-COF were also proposed. As a result, with the uncomplicated preparation, effective and selective adsorption and reusability, Por-PD-COF was a promising specific adsorbent and photocatalyst for further application in specific organic molecules separation and organic waste removal from aqueous solution.
研究领域:
材料科学
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环境科学
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化学
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高影响因子
Journal of Materials Chemistry B
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2023
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IF 7
Yinsheng Liu,Mingyue Wang,Yinfei Hui,Lei Sun,Yanrui Hao,Henlong Ren,Hao Guo,Wu Yang
In this study, a rare-earth hybrid luminescent material (lanthanide@COF) was constructed for the detection of a biomarker for anthrax (dipicolinic acid, DPA). JCU-505-COOH was prepared by the hydrolysis of the cyano group in JCU-505 via a post-synthetic modification strategy, then the carboxyl groups in JCU-505-COOH coordinated with Tb3+ ions, similar to pincer vising nut. The prepared Tb3+@JCU-505-COOH exhibited a turn-on response toward DPA, which allowed the lanthanide@COF to serve as a fluorescence sensor with excellent selectivity and high sensitivity (binding constant Ka = 3.66 × 103). The fluorescent probe showed satisfactory performance for the determination of DPA in saliva and urine with a detection limit of 0.6 μM. Moreover, we established a facile point-of-care testing (POCT) using the Tb3+@JCU-505-COOH-based fluorescent test paper together with a smartphone for the initial diagnosis of anthrax. As expected, Tb3+@JCU-505-COOH showed great potential for the rapid screening of anthrax due to low cost, simple operation, and wide applicability.
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APPLIED SURFACE SCIENCE
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2023
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IF 6.7
Qihui Sun,Jinyao Li,Hongyan Zhang,Xiong He,Baoshan Wu,Junwei Wang,Nasir Mahmood,Xian Jian
Traditional single-component microwave absorbers face the difficulties including the narrow absorption bandwidth and low absorption strength. Herein, we develop a novel dual-magnetic composite decorating with covalent-organic framework (COF of 1,3,5-triformylphloroglucinol and p-phenylenediamine: TpPa) and carbon hybrid to enhance microwave absorption performance. Namely, a dual-magnetic FeSiAl@(CoFe 2 O 4 /C)@TpPa core–shell structure with rich interfacial polarizations was prepared by the three main steps: firstly, the plate-like FeSiAl was decorated with the MOFs of ZIF-67. And then it was converted to FeSiAl@(CoFe 2 O 4 /C) after an annealing process under Ar. Lastly, the in-situ growth of COF (TpPa) was designed for enhanced microwave penetration into the interior of absorbers. The as-design dual-magnetic FeSiAl/CoFe 2 O 4 effectively favors to magnetic domain resonance resulting in the dual-magnetic coupling effects. Meanwhile, the multi-level structure formed by ultra-fine carbon in FeSiAl@(CoFe 2 O 4 /C)@TpPa enables magnetic-dielectric synergies and enriches the attenuation path as well. Furthermore, the accumulation of transferred charge at multiple interfaces provides a stronger relaxation polarization loss. The above positive factors collectively promote the high-performance microwave absorption with the reflection loss (RL) value up to −51.3 dB and the effective absorption bandwidth (EAB) covers 3.2–17.7 GHz by adjusting the thickness of absorbers. Therefore, this dual-magnetic/dielectric coupling approach provides an innovative strategy for fabricating advanced microwave absorbers.
研究领域:
材料科学
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电磁学
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Food Chemistry-X
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2025
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IF 8.2
Shenling Wang,Liyuan Wang,Kaiming Wu,Li Yu,Xiaofeng Yue,Wenqin Wu,Amnart Poapolathep,Saranya Poapolathep,Alejandro Cifuentes,Elena Ibanezd,Peiwu Li,Xiaofeng Hu,Zhaowei Zhang
Aflatoxin B1 (AFB1) and benzo(a)pyrene (B(a)P) are representative co-occurring contaminants at trace levels in food samples. However, their simultaneous extraction and detection remain challenging due to differing polarities, low concentrations, and matrix interferences. Herein, a hydroxyl-functionalized imine-linked magnetic covalent organic framework (Fe 3 O 4 @COFs-DhaTab) was synthesized via a one-pot, room-temperature condensation. Fe 3 O 4 @COFs-DhaTab enabled a one-sorbent, one-workflow extraction of AFB1 and B(a)P via synergistic π-π stacking and hydrogen bonding. Fe 3 O 4 @COFs-DhaTab exhibited equilibrium adsorption capacities of 3.64 and 8.23 mg/g for AFB1 and B(a)P, respectively. Coupled with high-performance liquid chromatography, the method enabled simultaneous detection of both analytes with detection limits of 0.031–0.039 μg/kg. The method was validated across high-risk, matrix-diverse foods (edible oils, cereals, nuts, spices) and water, yielding recoveries of 84.4 %–113.6 % (AFB1) and 85.4 %–112.2 % (B(a)P). Fe 3 O 4 @COFs-DhaTab demonstrated excellent recyclability over three cycles. The cost-effective platform enables simultaneous extraction and quantification of co-occurring pollutants in complex matrices, enabling rapid and accurate multi-analyte analysis.
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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毒理学
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JOURNAL OF CATALYSIS
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2026
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IF 6
Zhen Lu,Qing Jiang,Danni Tang,Yunye Huang,Yuanhao Lin,Longqiang Xiao,Linxi Hou
Photocatalytic PET-RAFT polymerization has emerged as a powerful strategy for controlled radical polymerization, where the efficiency and precision of the reaction critically depend on the properties of the photocatalyst. However, the impact of particle size on covalent organic frameworks (COFs) catalysis and its mechanism in PET-RAFT systems remains largely unexplored. Herein, we report the synthesis of a series of spherical COFs (PCOFs) with highly ordered channels and tunable particle sizes under mild conditions. Comprehensive characterization using UV–Vis diffuse reflectance spectroscopy, photoluminescence, transient fluorescence lifetime, and electrochemical measurements revealed that particle size strongly influences the optical absorption and charge-carrier separation efficiency of PCOFs. PET-RAFT polymerization studies demonstrated that larger PCOF particles exhibit significantly enhanced catalytic activity, primarily due to improved visible-light utilization, stronger electron transfer capability, and more efficient photoinduced electron transfer to the RAFT agent, accelerating polymerization rates while maintaining precise control over number average molecular weight and molecular weight dispersity. On-off light experiments confirmed good temporal control, and chain-extension and monomer-variation experiments highlighted the versatility of PCOF-100 in mediating PET-RAFT polymerization. Recyclability tests further demonstrated the structural stability and reusability of the catalyst. This work identifies the intrinsic role of COF particle size in dictating photocatalytic performance, offering a rational design principle for designing efficient catalysts for photocatalytic PET-RAFT polymerization.
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TALANTA
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2025
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IF 6.1
Liwu Gan,Xiaoying Feng,Suxin Zhou,Jinglin Chen,Juan Zheng,Gangfeng Ouyang
Functionalized metal organic framework (MOF) and covalent organic framework (COF) composites (MOF@COFs) with complementary advantages, hierarchical pores, pre-designable and tunable structures, are expected for remarkable adsorption of organic pollutants, yet to be explored. Herein, a kind of MOF@COF composite was synthesized by combining the parent MIL-68(In) and COF–V (10 %-MIL-68@COF–V), characterized with well-retained crystallinity and hierarchical pores. The parent materials and as-prepared MIL-68@COF-Vs were further fabricated as solid phase microextraction (SPME) coatings to study their extraction performance for Cl/Br-substituted organic pollutants. The 10 %-MIL-68@COF–V coated fiber exhibited the most outstanding enrichment performance for Cl/Br-substituted organic pollutants mainly due to the synthetic advantages, which was 1.1–196.5 times superior than that of the commercial PDMS coating. By combining it with gas chromatography-mass spectrometry (GC-MS), an ultrasensitive method was established, exhibiting wide linear ranges (1–5000 ng L −1 ), low LODs (0.17–0.29 ng L −1 ), and good reproducibility. The trace Cl/Br-substituted organic pollutants in marine water samples were successfully detected, verifying the practicability of the developed method in environmental monitoring.
研究领域:
环境科学
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材料科学
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2022
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IF 24.319
Jiali Liu,Xiaomin Ren,Chunzhi Li,Maodi Wang,He Li,Qihua Yang
Photocatalytic regeneration of the high-cost co-factor NADH is a promising method to couple photo-enzyme catalysis, however, the usage of homogeneous electron mediator ([Cp*Rh(bpy)H 2 O] 2+ ) which deactivates enzymes deteriorates the whole process efficiency. Herein, we report the immobilization of electron mediator ([Cp*Rh(bpy)H 2 O] 2+ ) on covalent organic frameworks (COFs) by the sequential assembly method. The resultant bi-functional photocatalyst with controlled cascade electron transfer afforded NADH production rate of 9.8 mmol·g COF −1 ·h −1 , much higher than previously reported ones with integrated electron mediator. The photo-enzyme coupling system with the photocatalyst and alcohol dehydrogenase could continuously produce butanol for at least 180 min under visible light irradiation, implying the potential application of bi-functional photocatalyst in artificial photosynthesis.
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COLLOIDS AND SURFACES B-BIOINTERFACES
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2024
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IF 5.4
Baiwei Ma,Xuanyu Lin,Tiaotiao Zhu,Xiaofei Zheng,Juanfang Zhu
s The novel donor–acceptor (D–A) type covalent organic frameworks TATF-COF and TATP-COF, with multiple fluorine groups as electron storage units, were successfully constructed to achieve efficient charge transfer and photocatalytic activity for antibacterial photocatalytic therapy. Fluorine, the most electronegative element, was utilized as an electron-withdrawing substituent for the acceptor, which could unite the donor unit together and efficiently improve the charge transfer from the donor to acceptor. The unique D–A structures of TATF-COF and TATP-COF ensure that they have narrow band gaps, strong photocurrent responses, long fluorescence lifetimes , and good capacity to generate reactive oxygen species (ROS) to realize good antibacterial activity . Meanwhile, the inclusion of multiple hydrophilic fluorine groups means that TATF-COF and TATP-COF are highly water dispersible, which is also beneficial in terms of promoting the generation of adequate quantities of ROS. Hence, in view of their excellent photoelectric properties and good water dispersibility, further investigations were performed, and excellent antibacterial activities in vitro against both gram-negative and gram-positive bacteria were demonstrated for TATF-COF and TATP-COF. In addition, we also showed that they can function as effective antibacterial dental materials.
研究领域:
材料科学
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生物医学工程
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光催化技术
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JOURNAL OF CHROMATOGRAPHY A
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2024
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IF 3.8
Li Liang,Jia Chen,Jing Xiao,Hongdeng Qiu
With the continuous development of industrialization, the excessive emission of nitro aromatic with strong toxicity, high carcinogenicity and non-degradability has attracted great attention. How to efficiently remove nitro aromatic pollutants is an important research topic. In this work, graphene oxide/covalent organic frameworks (GO/COFs) composites were successfully synthesized via interlayer confinement strategy selecting GO, 2,5-dimethoxybenzene-1,4-dicarboxaldehyde (DMTP) and 1,3,5-tri(4-aminophenyl)benzene (TPB) as raw materials. Due to high specific surface area, hierarchical porous structure and good thermal stability, GO/COFs were utilized to adsorb and remove nitro aromatic hydrocarbons in the water environment. The adsorption behavior of GO/COFs for o-nitrophenol, 1,3-dinitrobenzene and 2,4,6-trinitrophenol were further investigated. The GO/COFs composites showed the strongest adsorption capacity for 2,4,6-trinitrophenol, and the maximum adsorption capacity for 2,4,6-trinitrophenol, o-nitrophenol, and 1,3-dinitrobenzene were 438, 317, and 173 mg g −1 , respectively. The experimental results indicated that the GO/COFs composites provided great adsorption capability for nitro aromatic pollutants and can be reused, rendering it an extremely potential adsorbent for organic pollutants.
研究领域:
环境科学
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材料科学
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2026
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IF 5.4
Zina Zhang,Kaiyue Fan,Tengda Shi,Tong Hao,Jiaqi Li,Yanan Yang,Yu Bian,Hong Zheng
The key to removing and detecting trace Hg (II) in water is to achieve rapid adsorption and high adsorption capacity of the adsorbent while maintaining the simplicity and safety of the adsorbent preparation process. Herein, we report a post-modification of covalent organic frameworks by medical antidote dimercaprol (DMC-COF) for efficacious removing and detection on trace Hg (II) in water. The as-prepared DMC-COF showed excellent selectivity to trace Hg (II) and fast adsorption dynamics, which was attributed to the abundance of sulfhydryl and hydroxyl sorption sites in the COF mesopores and on the COF surface. The effluent concentration of Hg(II) coexisting with Ca(II) reduced from 30 μg·L −1 to the permissible limit (1 μg·L −1 ) of potable water standard within 30 s. The sorption equilibrium was achieved during 3 min and the adsorption rate reached over 98 %. The material also showed a wide applicable pH range (3.5–9.5), excellent regeneration feasibility and selectivity of Hg(II) coexisting with a wide range of heavy metals in tap water, and the effluent concentration of Hg(II) coexisting with trace of As(V), Cr(VI), Cd(II) and Pb(II) could reduce from 30 to 0.19 μg·L −1 during 10 min. Moreover, Hg(II) of 3, 6, 10 and 30 μg·L −1 in tap water could be achieved to meet the WHO standard within 1 min. Meanwhile, its conjugated framework could be used as a signal sensor for rapid testing for low concentration Hg(II) in water, with a fluorescence detection limit of 1.06 mg·L −1 . DFT calculations yielded the optimized structure of DMC grafted onto COF-V, revealing that Hg²⁺ and Hg(OH)₂ primarily adsorbed at the -S and -SH sites, predominantly through van der Waals interaction, whereas Hg(OH)⁺ mainly adsorbed at all the -S, -SH and -OH sites, governed by notable attraction.
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LANGMUIR
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2020
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IF 3.557
Xingyuan Wang,Xiansong Shi,Yong Wang
Covalent organic frameworks (COFs) are increasingly utilized as doping agents for the design of advanced ultrafiltration mixed matrix membranes, thanks to their prominent nanoporosity and excellent polymer compatibility. However, current strategies are largely limited in the complicated postaddition of neutral COF particulates. Herein, cationic COFs, namely, TpEB, with sizes down to ∼39 nm are in situ synthesized in polyacrylonitrile (PAN) solution as crystalline fillers for the production of highly permeable TpEB–PAN ultrafiltration membranes. After the condensation of monomer pairs, the growth of cationic TpEB crystallites is restrained due to the electrostatic interaction with negatively charged PAN chains, leading to the formation of a homogeneous TpEB-incorporated casting solution. During the subsequent nonsolvent-induced phase separation process, TpEB crystallites facilitate exchange between the solvent and the nonsolvent because of their hydrophilic and nanoporous nature, accelerating the rate of phase inversion to form a highly porous membrane surface. Thus-prepared TpEB–PAN membranes deliver a tight rejection of BSA with water permeance of up to 380 L m–2 h–1 bar–1, which is 35.6% higher than that of the original PAN membranes prepared without TpEB. The TpEB–PAN membranes also exhibit enhanced operation stabilities and fouling resistances. This in situ growth strategy suggests a new avenue for the preparation of advanced mixed matrix membranes.
研究领域:
材料科学
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化学工程
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膜技术
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高影响因子
危险品化学品经营许可证（带存储）