ChemSusChem
·
2022
·Vol. 15
·期 7
·e202200184
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IF 9.14
Siyong Ou,Min Zhou,Wen Chen,Yuyao Zhang,Yueli Liu
Graphical Photocatalytic CO 2 reduction : A COF-5/CoAl-layered double hydroxide (LDH) heterojunction photocatalyst is developed for the CO 2 reduction reaction. CoAl-LDH incorporation enhances the visible-light response-ability of the photocatalyst and improves the separation efficiency of photogenerated electron–hole pairs through the role of a type-II heterojunction. Photocatalytic conversion of CO 2 into value-added chemical fuels is an attractive route to mitigate global warming and the energy crisis. Reasonable design of optical properties and electronic behavior of the photocatalyst are essential to improve their catalytic activity. Herein, the 1D/2D heterojunction by direct in-situ synthesis of the covalent organic framework (COF)-5 colloid on the surface of CoAl layered double hydroxide (LDH) was used as the prospective photocatalyst for CO 2 reduction. COF-5/CoAl-LDH nanocomposite achieved 265.4 μmol g −1 of CO with 94.6 % selectivity over CH 4 evolution in 5 h under visible light irradiation, which was 4.8 and 2.3 times higher than those of COF-5 colloid and CoAl-LDH, respectively. The enhanced catalytic activity was derived from the increased visible-light activity and the construction of type II-2 heterojunction, which greatly optimized visible light harvesting and accelerated the efficient separation of the photoinduced holes and electrons. This work paves the way for rational design of heterojunction catalysts in photocatalytic CO 2 reduction.
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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DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
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IF 8.6
Wenbei Chen,Huixian Liu,Yuting Chen,Jian Ke,Xin Qiu,Jianqiu Chen,Yibing Ji
Membrane separation technology has infinite potential to produce optically pure drugs. However, there are still challenges regarding chiral membranes, such as the single separation object, poor mechanical properties, and constrained relationship between permeability and enantioselectivity. To improve the membrane properties, heptakis (6-amino-6-deoxy)- β -CD-modified carboxyl-functionalized COF (TpBD-Am7CD) was introduced as a chiral functional material for the preparation of a TpBD-Am7CD stainless steel I-Net cellulose acetate membrane (COF/SSCAM) via interfacial polymerization. Using tryptophan as the template molecule, the membrane preparation and filtration conditions were optimized to achieve maximum enantioselectivity. The optimized COF/SSCAM achieved a better enantiomeric excess percentage (e.e.% = 100.00%) and solute permeation flux (J S = 37 × 10 −6 mol m −2 h −1 ) for racemic tryptophan than the support membrane, which was attributed to the enantioselectivity and hydrophilicity of TpBD-Am7CD. Moreover, COF/SSCAM achieved enantiomeric separation of racemates of propranolol, warfarin, atenolol, and metoprolol, and the e.e.% values were 39.51%, 5.60%, 16.04%, and 3.09%, respectively. In addition, the chiral recognition mechanism was investigated by molecular docking simulation.
研究领域:
材料科学
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生物医学工程
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化学工程
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DOI
高影响因子
ACS Applied Polymer Materials
·
2023
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IF 5
Zhipeng Zhao,Huimeng Feng,Dong Qin,Wen Li,Wei Wang,Shougang Chen
Herein, we designed and synthesized a two-dimensional covalent organic framework (2D-COF) of a Schiff base using a mechanical chemical grinding method. Moreover, capsaicin@chitosan (CAP@CS) microcapsules were loaded on a TpPa-1 COF by a physical adsorption method to prepare composites (CAP@CS/TpPa-1), which realized the pH-sensitive controlled release of the fungicide CAP, dispersed in fluorocarbon resin to prepare an intelligent coating with environmentally friendly long-term antifouling performance. TpPa-1 improves the antibacterial efficiency by increasing the dispersity of CAP@CS in the resin. Therefore, a CAP release amount of 2 wt % composite coating can meet the minimum bacteriostatic concentration of 37.5 μg/mL required for antifouling. Importantly, pH-responsive controlled release caused by the protonation of CS and the electrostatic interaction between CAP@CS and TpPa-1 COF and increased bacterial contact area by CAP@CS reunion inhibited by TpPa-1 COF improve the bactericidal efficiency of the composite. The composite coating has excellent corrosion resistance, mainly because COF extends the propagation path of the corrosive medium.
研究领域:
材料科学
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化学
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生物医学工程
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环境科学
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DOI
高影响因子
FOOD CHEMISTRY
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2025
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IF 9.8
Xiaomu Shan,Jie Pan,Xuejian Du,Jian Shi,Zhuofan Wei,Yuanze Xu,Shouzhen Jiang
The excellent performance of surface-enhanced Raman spectroscopy (SERS) is closely related to the intensity, density and uniformity of hotspots. In this study, we introduce a PET/Au NPs@COF Raman substrate featuring three-dimensional hotspots. The spacing between each layer of gold nanoparticles (NPs) is precisely controlled by adjusting the thickness of the COF via the interfacial synthesis technique, causing the strong coupling between gold particles across the layers. The porosity of the COF enables the substrate to adsorb numerous analyte molecules into the large-area uniform hotspots. Through simulations and adsorption detection on the substrate, Raman testing further demonstrated that the substrate with double-layer Au NPs@COF exhibited the most favorable SERS performance. Additionally, the substrate allows for selective detection based on the particle size of the target molecule. The flexibility of the substrate enables it to conform to irregular surfaces, effectively capturing analytes from a variety of real samples.
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
JOURNAL OF MEMBRANE SCIENCE
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2024
·
IF 8.4
Yingbo Li,Jing Ma,Hongjun Lin,Cheng Chen,Saleam Raza,Qianqian Zeng,Xinchun Lu,Liguo Shen
The development of composite membranes utilizing transition metal carbides and nitrides, exemplified by Ti 3 C 2 T x (MXene), has proven efficacious in the treatment of oily wastewater. However, challenges arise from the prolonged and convoluted transport paths within MXene interlayer nanochannels, significantly impeding mass transfer and diminishing membrane permeability. This investigation incorporated porous covalent organic frameworks (COFs) as intercalating agents into two-dimensional (2D) MXene-based membranes to expand the interlayer nanochannels. The resulting MXene@COF-TpBD functional layer polyethersulfone (PES) composite membrane exhibited a distinctive dual superoleophobic surface, concurrently manifesting underwater superoleophobicity and underoil superhydrophobicity (underwater oil contact angle >150°, underoil water contact angle >150°). The membranes exhibited excellent water flux (up to 4092.7 L m −2 h −1 ·bar −1 ), efficient oil-water emulsion separation (up to 1908.4 L m −2 h −1 ·bar −1 , rejection rates >99.78 %), noteworthy fouling resistance and structural stability, outperforming most of existing similar membranes. Furthermore, supported by the extended Derjaguin-Landau-Verwey-Overbeek (XDLVO) theory, the incorporation of COF-TpBD improved the antifouling characteristics of the composite membrane. This work presents innovative insights into the improvement of 2D MXene membranes and the use of COF-TpBD for the specific remediation of oily wastewater.
研究领域:
材料科学
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环境工程
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DOI
高影响因子
Analytical Methods
·
2025
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IF 2.6
Zhe Jiao,Xiudong Shi,Xiaolin Zhang,Xiaofang Zhao,Yueting Wang,Feng Xu,Jing Zhang
Exhaled biomarker detection as a non-invasive and portable analytical method, holds great potential in the field of point-of-care testing. Acetone exhibited a higher concentration in the exhaled breath of diabetic patients compared to healthy individuals. Therefore, the development of a highly sensitive, easy-to-operate, and portable acetone detection technology can be utilized for the rapid screening of diabetes. A covalent organic framework Eu-COF was synthesized, and its fluorescence can be specifically quenched by acetone based on the mechanism of energy competition. A flexible Eu-COF-based fluorescent film was prepared using polyvinyl alcohol (PVA) as the substrate and suited to a 3D printing device portable device for on-site rapid detection of acetone. The linearity of concentration was ranged from 0.2-8.0 mg/m3, with a detection limit of 0.1 mg/m3 (RSD=8.6%). The accuracy of the device was validated by comparison with the results of GC-MS. Based on F-Test, there were no significant differences between the results of portable device and GC-MS. The Eu-COF-based fluorescent film exhibited comparable response in humid environment as well. The detection device integrated sample collection and testing in one step and directly providing the concentration of acetone exhaled by the patient. It can serve as a rapid screening tool for point-of care, non-invasive diabetes detection.
研究领域:
医学诊断
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材料科学
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分析化学
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DOI
PubMed
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 24
·13458-13464
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IF 3.049
Hao Guo,Mingyue Wang,Rui Xue,Jing Yao,Xuejiao Wang,Longwen Zhang,Jianfeng Liu,Wu Yang
A new COF (NWNU-COF-4) linked by an aryl ether bond (Ar–O–Ar) was synthesized by the condensation reaction of 2,4,6-trihydroxypyrimidine and trinitrophenol under simple and easy reaction conditions. Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), N2 adsorption–desorption, thermogravimetric analysis (TGA), powder X-ray diffraction (XRD) and scanning electron microscopy (SEM) were utilized to characterize the product. The BET specific surface area of NWNU-COF-4 was 21.33 m2 g−1, and its pore size was about 1.351 nm. Additionally, this method of preparation was simple and cheap. The electrochemical measurements showed that the synthesized NWNU-COF-4 had excellent pseudocapacitive performance with maximum specific capacitance of 133.44 F g−1 at 0.3 A g−1 in 6 mol L−1 KOH electrolyte. When the current density increased by 10 times (3.0 A g−1), the specific capacitance was 114.12 F g−1, and the retention rate was 82%. After 10 000 GCD cycles, the capacitance still kept 94% of its initial capacitance.
研究领域:
材料科学
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电化学
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DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
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2025
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IF 5.1
Yueru Chen,Zongning Guo,Xuelin Huang,Jiangying Qu,Feng Gao,Kai Wan,You Zhang,Xiaofang Zhao,Zhe Jiao
In this study, we designed a fluorescent Por-COF-MF, for selective detection SO 2 in wine. The fluorescence was quenched due to the intramolecular charge transfer (ICT) process blocked by SO 2 . A good linear relationship of fluorescent intensity with SO 2 in the concentration range of 0.01–1 ppm was found. To achieve facile solid-state detection, Por-COF-MF was loaded on polyvinyl alcohol (PVA) to fabricate a uniform fluorescent film Por-COF-MF@PVA. Then a portable device was designed by 3D printing technology. The device exhibited good linearity in the SO 2 concentration range of 0.5–3 ppm, with a detection limit of 0.06 ppm. The relative standard deviation (RSD) was less than 8 % when measuring SO 2 in three different types of wine. Compared to other portable technologies, our 3D-printed fluorescent device allowed for direct detection of SO 2 content in wine, which provided a more effective and economical method for food safety monitoring.
研究领域:
食品安全
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化学传感器
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材料科学
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DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
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2025
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IF 4.7
Xiongyi Peng,Jianyu Li,Xujia Cao,Jiarui Zhang,Yongqiang Li,Yufeng Liu
Constructing semiconductor composites composed of multiphase heterojunctions has been considered as an effective strategy for designing promising photocatalyst systems. In this work, a novel ternary heterojunction photocatalyst was prepared by integrating MoS 2 semiconductor nanoflowers with silver doped covalent organic frameworks (COFs) and used for photocatalytic degradation of antibiotics. The regular pore structure and solid skeleton of COFs matrix optimize the distribution of constituent units, making Ag-MoS 2 nanoflower uniform and highly dispersed on the COFs material matrix. Moreover, the silver nanoparticles in the catalyst acted as an electron mediator, which inhibited the recombination of charge carriers, and effectively enhanced the photocatalytic activity of Ag-MoS 2 @COF. The as-prepared Ag-MoS 2 @COF ternary heterojunction photocatalyst exhibited high degradation efficiency for tetracycline (TC), reaching 90.1 % after 50 min of visible light irradiation, which was superior to most heterojunction photocatalysts. The Ag-MoS 2 @COF also demonstrated good reusability, almost maintaining the initial photocatalytic efficiency after 5 cycles. In addition, the plausible direct solid-state Z-scheme photocatalytic mechanism for TC degradation with Ag-MoS 2 @COF ternary catalyst under visible light irradiation was proposed according to LC-MS analysis, radicals trapping experiment and photoelectric chemical test. This work provides a new paradigm for the design and development of COF-based ternary heterojunction photocatalysts for environmental remediation.
研究领域:
材料科学
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环境科学
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光催化技术
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产品关联
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2024
·
IF 4.4
Bingzhen Ma,Wangye Hu,Yue Zhou,Yangyang Li,Yuhui Zhang,Meiqi Zhou
MOF@COF hybrid materials not only have high stability and adjustable function, but also have the characteristics of MOFs and COFs materials, which make them have important application value in the field of adsorption. This article employs 1,3,5-benzene tricarbonyl chloride and p -Phenylenediamine as covalent organic framework monomers. Through the in-situ growth of covalent organic frameworks (COF) on the surface of NH 2 -MIL-88(Fe) material, a novel, stable, and porous COF-on-MOF hybrid material (NH 2 -MIL-88(Fe)/COF) was synthesized. The structure, morphology, and performance of the hybrid material were thoroughly examined using characterization techniques, including Fourier-transform infrared spectroscopy (FT-IR), powder X-ray diffraction (PXRD), scanning electron microscopy (SEM), and thermal gravimetric analysis (TGA). Subsequently, We explored the MOF@COF hybrid material as an effective adsorbent for removing organic dyes, namely methylene blue (MB), methyl orange (MO), and crystal violet (CV). The influence of various adsorption parameters, such as adsorption time, initial dye concentration, and different pH values, on dye adsorption performance was systematically investigated. Experimental results revealed that at pH = 7, NH 2 -MIL-88(Fe)/COF demonstrates maximum adsorption capacities of 114 mg·g −1 , 106 mg·g −1 , and 102 mg·g −1 for methylene blue, methyl orange, and crystal violet, respectively. The adsorption process follows pseudo-second-order kinetics and Langmuir isotherm models. Lastly, NH 2 -MIL-88(Fe)/COF maintains high removal efficiency for the three dyes even after five repeated uses, establishing it as a stable and efficient adsorbent. The research findings suggest that MOF@COF hybrid materials hold promising applications in the treatment of dye-containing wastewater.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2025
·
IF 4.6
Yinjia Zhao,Xufang Hu,Chengyu Li,Jing Hu,Tianran Yuan,Yanxiong Liu,Qiue Cao,Shiyu Feng,Liyan Zheng
17β-estradiol (E2) is a crucial estrogen that significantly influences reproductive biological processes and the development of associated diseases, highlighting the need for effective detection methods. Here, we propose a magnetic hierarchical porous material (Mag MOF@COF-Apt) through the in situ growth of a TAPB-DMTP-COF layer on a magnetic Fe-MOF core for the selective recognition and surface-enhanced Raman scattering (SERS) analysis of E2. The Mag MOF@COF-Apt features the inherent SERS-enhancing properties of Mag MOFs. Furthermore, the COF layer establishes a gap between E2 and the Mag MOF, enhancing SERS activity through the on-shell-isolated effect. Additionally, the topological structure of the COF on the MOF provides a high surface area platform for more affinity sites, and its expanded porous structure facilitates size-exclusion of interferents. Finally, E2 aptamer functionalization equips this heterojunction with the capability for the selective capture of E2. Through these multiple synergistic effects, the Mag MOF@COF-Apt assisted E2 profiling features good sensitivity (detection limit of 110.14 nmol L −1 ), strong tolerance to protein (40 mg mL −1 BSA, 40 mg mL −1 HSA) and salt (40 mg mL −1 NaCl) interference, high signal reproducibility (RSD = 7.29 %) and reusability over four cycles. The effectiveness of Mag MOF@COF-Apt based profiling was validated by successful E2 detection in human serum. This work is anticipated to advance MOF/COF hybrid substrates for SERS, providing an effective tool for E2 analysis.
研究领域:
分析化学
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生物医学工程
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产品关联
DOI
PubMed
高影响因子
Journal of Materiomics
·
2024
·
IF 8.4
Huili Ran,Xue Liu,Jiajie Fan,Yun Yang,Lijie Zhang,Qin Guo,Bicheng Zhu,Quanlong Xu
The construction of heterojunction is an effective way to promote the photoinduced charge carrier separation in spatial, thus accelerating the photocatalytic reaction. However, the regulation of interface properties, as a crucial factor in affecting the charge carrier diffusion process, still remains a significant challenge. In this work, BiOBr/TpBD-COF heterojunction was successfully constructed via a novel phase transformation strategy. Specifically, perovskite Cs 3 Bi 2 Br 9 was first synthesized and then in-situ transformed into BiOBr during the preparation of TpBD-COF procedure, thus obtaining BiOBr/TpBD-COF heterojunction with favorable interface. According to the in-situ X-ray photoelectron spectroscopy (XPS) characterization and electron paramagnetic resonance (EPR) analysis, the photogenerated electrons with weak reduction power transfer from BiOBr to TpBD-COF driven by the internal electric field under irradiation, conforming S-scheme charge transfer mode. As a result, the photogenerated electrons and holes with strong redox abilities are spatially located on TpBD-COF and BiOBr surface, respectively, endowing the strong driving force toward the water splitting reaction. The optimized 10%BiOBr/TpBD-COF displayed remarkably enhanced photocatalytic hydrogen evolution rate (16.17 mmol·g −1 ·h −1 ) in comparison with TpBD-COF (5.18 mmol·g −1 ·h −1 ). This study will provide some novel inspirations for developing efficient COF-based S-scheme heterojunction photocatalysts.
研究领域:
材料科学
·
光催化
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DOI
高影响因子
危险品化学品经营许可证（带存储）