JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Xiaolong Hu,Jingyu Bao,Daiwen Chen,Syed Jalil Shah,Sidra Subhan,Wenxue Gong,Wenyuan Li,Xinqi Luan,Zhongxing Zhao :,Zhenxia Zhao
In the photo-Fenton reactions, fast recombination of photoinduced electrons and holes in Fe-based metal–organic frameworks (Fe-MOFs) slows Fe(III)/Fe(II) cycle, which remains big challenge that significantly retards the overall process. Herein, NH 2 -MIL-88B(Fe) (NM88) was modified with 3,5-diaminobenzoic acid (DB) and TPB-DMTP-COF (COF-OMe) to in situ construct NM88(DB) 0.85 /COF-OMe composite that could strongly harvest the visible light for photo-Fenton degradation of sulfamerazine (SMR). With the addition of DB, electron-donating effect of NM88 was strengthened, which then promoted amino groups to react with aldehyde groups (Schiff-base), and thus highly facilitated the interfacial contact between NM88 and COF-OMe. Such modifications increased the degradation rate constants for NM88(DB) 0.85 /COF-OMe to 15.1 and 17.3 times that of NM88 and COF-OMe respectively with good reusability. Moreover, the catalyst exhibited 32–170 times higher degradation kinetics in comparison to other reported catalysts. Results showed that due to the Schiff-base reaction between NM88(DB) and COF-OMe, electron density on Fe(III) was decreased; and the photogenerated electrons of COF-OMe moved to NM88(DB) to reduce Fe(III), thus resulting in the generation of highly active Fe(II) and ·OH species. Furthermore, the main reactive species were determined to be ·OH and ·O 2 – by trapping experiments, and a possible mechanism of the degradation system followed Z-scheme charge transfer.
研究领域:
环境科学
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材料科学
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DOI
PubMed
高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Yue Zhao,Da-Peng Wang,Guang-Long Zhang,Jin-Wei Zhang,Ji-Yong Zheng,Cun-Guo Lin
In this work, the carbon-based 2D-3D composite nanocontainers endowing coatings with both active and passive protection properties were constructed by the sp 2 /sp 3 hybridized carbon as a versatile strategy. The classic graphene oxide (GO, sp 2 C) and Covalent Organic Framework-300 (COF-300, sp 3 C) were chosen as examples and benzotriazole (BTA) as the inhibitor to fabricate the GO/COF-300@BTA nanocontainer. The composite nanocontainers embedded in polyvinyl butyral (PVB) coatings were applied on cupper substrates to get mechanical enhancement, active and passive corrosion protection performance. The tensile strength of GO/COF-300/PVB (12.38 Mpa) was two times higher than that pure PVB (5.96 MPa). The active protection performance was ensured by the corrosion inhibitors encapsulated in the 3D porous carbon skeleton. The passive protection performance was endowed by the maze effect of the 2D carbon-based nanosheets. The |Z| 0.01 Hz of Cu/(GO/COF-300@BTA)/PVB was higher than 10 9 Ω·cm 2 , which was two magnitudes larger than that of PVB coating, demonstrating the anti-corrosion properties. In addition, the quantum chemical calculation and molecular dynamics simulation results elaborated the adsorption states of BTA on copper substrate and the compatibility between the molecular chains of the PVB and the GO/COF-300 nanocontainer.
研究领域:
材料科学
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腐蚀与防护
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表面工程
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产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Yan Qiao,Menglin Wang,Erling Guo,Ke Wang,Ling Ma,Kaoqi Lian
This study aimed to design and synthesize a novel adsorbent Fe 3 O 4 @SiO 2 @MPA-TAPA-COF material for the first time and used as an adsorbent of MSPE. It had significant potential for the pretreatment of trace analytes. The MSPE was coupled with ultra performance liquid chromatography–tandem mass spectrometry (UPLC-MS/MS) for the rapid extraction and detection of 12 sulfonamides (SAs) from water and milk samples for the first time. Several experimental parameters were optimized, including adsorbent dosage and the effects of pH, ionic strength, adsorption time, and desorption conditions. Under the optimized pretreatment and instrumental conditions, good linearity of 0.1–100 μg·L −1 with a correlation coefficient 0.9994–0.9999, low limits of detection (0.004–0.044 μg·L −1 ) and limits of quantitation (0.013–0.136 μg·L −1 ) were obtained. Moreover, the recoveries of sulfonamides in water and milk samples were in the range of 60.88 %-102.94 %, and the relative standard deviations not exceeding 9.62 %. Finally, the magnetic Fe 3 O 4 @SiO 2 @MPA-TAPA-COF material possessed the magnetic separation and high adsorption affinity for extracting SAs from real samples. This study holds great significance in enhancing the monitoring of SAs drug residues in water and milk.
研究领域:
分析化学
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环境科学
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食品科学
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产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Yingjie Guo,Jiayi Yan,Zan Chen,Cuijia Duan,Claudia Li,Yinhui Li,Sibudjing Kawi
The tendency of small-sized covalent organic framework (COF) nanoparticles to easily agglomerate, and the propensity of photo-generated carriers in α -Fe 2 O 3 to recombine pose challenges in the efficient removal of tetracycline (TC) through adsorption-photocatalysis synergy. This study addresses these challenges by introducing MIL-101, known for its excellent chemical stability and large specific surface area. The amino functional group facilitates the in-situ growth of acyl chloride-covalent organic framework (AC-COF) on the surface of MIL-101, resulting in the fabrication of AC-COF@MIL-101 with a core-shell structure. Loading α -Fe 2 O 3 through structural regulation leads to the preparation of the final α -Fe 2 O 3 /AC-COF@MIL-101 ternary nanocomposite. In α -Fe 2 O 3 /AC-COF@MIL-101 composites, the high surface energy of AC-COF is mitigated by the strong chemical energy of N C-N, reducing AC-COF aggregation and decreasing the recombination rate of photogenerated carriers in α -Fe 2 O 3 . The heterojunction structure between AC-COF@MIL-101 and α -Fe 2 O 3 enhances the degradation of TC, attributed to the synergistic effect of adsorption and photocatalysis. Experimental results demonstrate that α -Fe 2 O 3 /AC-COF@MIL-101 has a maximum adsorption capacity of 135.14 mg/g, achieving a 100% TC removal rate within 30 min. Compared to AC-COF, MIL-101, and α -Fe 2 O 3 , α -Fe 2 O 3 /AC-COF@MIL-101 exhibits higher adsorption capacity and photocatalytic activity. Specifically, its adsorption capacity is 2.1 times that of AC-COF, 1.8 times that of MIL-101, and 10.6 times that of α -Fe 2 O 3 . Additionally, its degradation ability is 8.6 times that of α -Fe 2 O 3 . The adsorption of TC by α -Fe 2 O 3 /AC-COF@MIL-101 occurs through monolayer chemical adsorption, and the process is exothermic. The main active species involved in the photocatalytic degradation process are h + and ·OH. This study introduces a new ternary composite multifunctional material with high adsorption and photocatalytic performance for TC, offering a potential strategy for enhancing the synergistically adsorption-photocatalytic effect in ternary composite systems.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Junting Dong,Guoliang Zhang,Fucong Liu,Houjun Qi,Kan Xing
COF-5 is an excellent choice as a lubricant additive due to its high specific surface area and regular layer stacking structure. In this paper, the porous covalent organic frameworks of the COF-5 nanomaterial were successfully synthesized as a lubricant additive via a method of sonochemical synthesis. Pure [BMIM][SCN] (BS) was used as the base oil, and the tribological properties of the COF-5-BS composite lubricant were evaluated by using a ball-on-disk wear tester. The results were demonstrated that the wear volume of BS with the addition of 0.1 wt % COF-5 was reduced by 46.64% as compared to that of the pure BS, and the corrosion on the friction interface was effectively inhibited by the addition of COF-5 nanomaterial. This phenomenon was ascribed to COF-5 with a large specific surface area, being adsorbed onto the friction interface, which could repair the wear-induced pits and prevent the direct contact between the metal substrate and the corrosive medium. The tribological properties of the COF-5-BS composite lubricant could be efficiently regulated under the applied electric current. The results of intelligent electric current-controlled friction were indicated that the average coefficients of friction (COF) under the current stimulation of 30 mA with on/off cycling were reduced by 12.05% as compared to that of a continuous current operated for 1 h. Moreover, the wear volume and depth were reduced by 11.69% and 8.75%, respectively. That is because the short duration of current regulation could enhance the rapid formation of a lubricant film composed of BS liquid and COF-5 nanosheets on the friction interface. Meanwhile, the temperature on the interface would not be high to produce the failure of lubricating film, resulting in an excellent low friction coefficient and excellent antifriction property.
研究领域:
材料科学
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摩擦学
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表面工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
TALANTA
·
2023
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IF 6.1
Zichen Yang,Guoqing Chen,Chaoqun Ma,Jiao Gu,Chun Zhu,Lei Li,Hui Gao
Quinolone antibiotics have good antibacterial properties and are commonly used antibiotics in the dairy industry. Currently, the problem of excessive antibiotics in dairy products is very serious. As an ultra-sensitive detection technology, Surface-Enhanced Raman Scattering (SERS) was applied to the detection of quinolone antibiotics in this work. In order to classify and quantify three antibiotics (Ciprofloxacin, Norfloxacin, Levofloxacin) with highly similar molecular structures, a combination of magnetic COF-based SERS substrate and machine learning algorithms (PCA-k-NN, PCA-SVM, PCA-Decision Tree) was used. The classification accuracy of the spectral dataset could reach 100% and the results of LOD calculation were: CIP: 5.61 × 10 −9 M, LEV: 1.44 × 10 −8 M, NFX: 1.56 × 10 −8 M. This provides a new method for the detection of antibiotics in dairy products.
研究领域:
分析化学
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食品科学
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药物分析
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产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Zhenjie Zheng,Jingxuan Wang,Mengqi Ma,Yunpeng Xu,Da Huang,Jian Wang,Cuiying Lin,Zhenyu Lin,Fang Luo
Sensitive and selective detection of N -nitrosodimethylamine (NDMA), a highly carcinogenic environmental contaminant, is essential for public health and safety. In this study, we have developed a homogeneous electrochemiluminescence (ECL) biosensor for ultrasensitive NDMA detection by integrating Nafion-functionalized covalent organic framework (COF) with aptamer recognition and magnetic separation. The imine-linked COF (COF-LZU1) scaffold not only enables stable encapsulation of Ru(bpy) 3 2 + , but also creates a confined microporous environment that locally concentrates c (TPrA) and enhances the generation and survival of TPrA radicals, thereby amplifying the ECL signal. Nafion further improves Ru loading and ionic conductivity. Biotinylated aptamers were initially immobilized on streptavidin-coated magnetic beads (MBs) and hybridized with complementary DNA-modified Ru@COF-LZU1 to form Ru@COF-LZU1-MBs complex. Upon NDMA binding, a conformational switch releases Ru@COF-LZU1 into the solution. After magnetic separation, the ECL signal of the supernatant is measured in the presence of TPrA. This homogeneous format avoids electrode surface modification, which is commonly required in conventional Ru@COF-LZU1-based ECL sensors, offering improved reproducibility and simplified operation. The biosensor exhibits a wide linear range (100 fg/mL - 100 ng/mL) with a low detection limit of 9.11 fg/mL. This platform offers a sensitive, reproducible, and facile strategy for monitoring NDMA and similar small-molecule contaminants in complex matrices.
研究领域:
环境监测
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分析化学
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生物传感技术
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纳米材料
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电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
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2023
·
IF 6.1
Tianxiang Sun,Kai Jin,Wei Wang,Wen Li,Tong Wang,Tengxun Yang,Jia Cheng,Zhipeng Zhao,Shougang Chen
Here, a long-term anti-corrosive epoxy (EP) coating based on nano-hybrid filler was developed. The surface of graphene oxide (GO) was aminated with (3-aminopropyl) triethoxysilane (APTES), and then the porous covalent organic framework (COF) was in-situ grown on amino functionalized graphene oxide (FGO) nanosheets by Schiff-based reaction to prepare FGO-COF nanofillers. Different characterization methods proved the successful modification of GO nanosheets with COF particles. The excellent water resistance of composite coatings was characterized through contact angle, adhesion, and water uptake tests. Transmission electron microscope (TEM) and molecular dynamics (MD) methods showed that the grafting of COF enhanced the dispersion and compatibility of GO in the coating. EIS measurements, salt spray analysis and cathodic delamination test indicated the significant improvements in the protective properties of the composite coatings compared with pure EP coating. The low-frequency impedance modulus of 1% FGO-COF composite coating reached higher than 6.8 × 10 9 Ω·cm 2 after immersed in sea water for 60 days. In addition, the 1% FGO-COF composite coating performed only 34% delamination ratio after 120 h cathodic delamination test.
研究领域:
材料科学
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化学工程
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腐蚀科学
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产品关联
DOI
高影响因子
Polymers
·
2024
·Vol. 16
·期 4
·539
·
IF 4.7
Jinxia Zhao,Jingchao Liu,Zenghe Li,Yilin Yin
In recent years, the response of new porous materials to visible light and their potential applications in wastewater treatment has received extensive attention from the scientific community. Metal Organic Frameworks (MOFs) and Covalent Organic Frameworks (COFs) have been the focus of attention due to their strong visible light absorption, high specific surface area, well-regulated pore structures, and diverse topologies. In this study, a novel MOF@COF composite with a high surface area, high crystallinity, and structural stability was obtained using the covalent bond formation strategy from COF-JLU19 and NH2-MIL-88B(Fe). Under visible light irradiation, the degradation of tetracycline hydrochloride by this material reached more than 90% within 10 min and was completely degraded within 30 min, which exceeded the degradation rate of individual materials. Remarkably, the catalytic activity decreased by less than 5% even after five degradation cycles, indicating good structural stability. The excellent photocatalytic performance of the NM88(DB)@COF-JLU19 hybrids was attributed to the formation of covalent bonds, which formed a non-homogeneous interface that facilitated effective charge separation and promoted the generation of hydroxyl radicals.
研究领域:
材料科学
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环境科学
·
光催化技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ANALYTICAL CHEMISTRY
·
2023
·
IF 7.4
Shao-Hua Wen,Hengyuan Zhang,Sha Yu,Junping Ma,Jun-Jie Zhu,Yuanzhen Zhou
Credible and on-site detection of organophosphorus pesticides (OPs) in complex matrixes is significant for food security and environmental monitoring. Herein, a novel COF/methylene blue@MnO2 (COF/MB@MnO2) composite featured abundant signal loading, a specific recognition unit, and robust oxidase-like activity was successfully prepared through facile assembly processes. The multifunctional composite acted as a homogeneous electrochemical and photothermal dual-mode sensing platform for OPs detection through stimuli-responsive regulation. Without the presence of OPs, the surface MnO2 coating could recognize thiocholine (TCh), originating from acetylcholinesterase (AChE)-catalyzed hydrolysis of acetylthiocholine (ATCh), and exhibited a distinctly amplified diffusion current due to the release of plentiful MB; while the residual MnO2 nanosheets could only catalyze less TMB into oxidized TMB (oxTMB) with a typical near-infrared (NIR) absorption, enabling NIR-driven photothermal assay with a low temperature using a portable thermometer. Based on the inhibitory effect of OPs on AChE activity and OP-regulated generation of TCh, chlorpyrifos as a model target can be accurately detected with a low limit of detection of 0.0632 and 0.108 ng/mL by complementary electrochemical and photothermal measurements, respectively. The present dual-mode sensor was demonstrated to be excellent for application to the reliable detection of OPs in complex environmental and food samples. This work can not only provide a complementary dual-mode method for convenient and on-site detection of OPs in different scenarios but also expand the application scope of the COF-based multifunctional composite in multimodal sensors.
研究领域:
食品安全检测
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环境监测
·
生物传感技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Yu Bing,Zhao Song,Hongtao Jiang,Xiaoyi Xu,Zhongzheng Yu,Tingting Zhou,Tong Zhang
Water competitive adsorption and limited reaction sites on the micro-scale sensing area of micro-electro-mechanical system (MEMS) sensors are two bottleneck problems that restrict the detection of trace indoor polluted gases, leading to drifting and weak signals. To address this, a “duet-insurance” sensing strategy is proposed to protect and amplify the sensing signal. For the first-level protection, the well-designed double-layer structure consisting of Janus TpMa covalent organic framework (COF)/Eu-doped α-Fe 2 O 3 can resist diffusion of water molecules and facilitate the electron transfer from formaldehyde (CH 2 O) to sensing layers, benefiting from the outer hydrophobic character of Janus TpMa and the strong CH 2 O adsorption capacity of Eu-doped Fe 2 O 3 . For the second-level amplification, the unique variable temperature excitation facilitates the deep penetration of CH 2 O into the active sites across COF layers, enabling signal amplification through thermally actuated carrier modulation. The sensor demonstrates high sensing ability to the CH 2 O, with an ultra-low limit of detection of 794 ppt. Leveraging the novel sensing strategy, a multi-functional, visual sensing system is designed to identify multi-indoor pollution gases by feature signal encoding and color mapping, showcasing the promising potential for MEMS sensors based on Janus TpMa COF/Eu-doped α-Fe 2 O 3 materials.
研究领域:
材料科学
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环境科学
·
化学
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Ting He,Shanshan Zhang,Yang Zhu,Jiangwei Chen,Xiaoyun Wang,Qingguo Li,Rizhi Chen,Wenbo Pei,Xin Chen,Haibao Duan,Zhaoliang Cui
Extracorporeal CO 2 removal (ECCO 2 R) is a type of extracorporeal life support (ECLS) technology. It aims to remove carbon dioxide (CO 2 ) from small flow of the blood and correct hypercapnia and related acidosis. The ECCO 2 R system removes CO 2 retained in the patient’s body through the gas-blood exchange membranes, which in use, blood flows on the outside of the membrane, and the inside of the membrane is for gas flow. Existing ECCO 2 R system generally improves the emission rate of CO 2 by the increase of the gas flow rate. However, there is a problem that O 2 is simultaneously taken out, which will reduce the blood O 2 concentration. Therefore, the gas-blood exchange membranes should not only increase the CO 2 removal rate by the improvement of CO 2 /O 2 selectivity, but also retain more O 2 in the blood and then maintain the oxygen saturation of the blood. In present work, a method was proposed to fabricate COF-5/Pebax mixed matrix membranes (MMMs) on the PMP surface for enhancing CO 2 /O 2 selectivity, which was increased from 0.96 to 5.57. The CO 2 removal ability of COF-5/Pebax MMM was tested by blood circulation, and it was found that the CO 2 removal effect was increased 10.9% than that of the pristine membranes. The O 2 concentration was maintained at a higher level, about 1.69 times that of the pristine membranes. In contrast to the pristine PMP membrane, blood compatibility of COF-5/Pebax MMMs was improved because protein adhesion decreased by 44.75%. The results of cytotoxicity test and rabbit pyrogen test exhibited that the prepared COF-5/Pebax MMM presented great biosafety. Overall, the proposed COF-5/Pebax MMM has good performance in ECCO 2 R system and attractive potential for medical application.
研究领域:
生物医学工程
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材料科学
·
医疗器械
✓ 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）