JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2026
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IF 4.6
Zhouchao Wang,Yuchen Zhang,Lin Xu,Baolong Niu
This study synthesized a novel pNiPc-COF via low-temperature molten salt method and composited it with GO. The synergy between them overcomes the conductivity bottleneck of pure COFs. • The electrochemical sensor based on this composite shows exceptional glucose detection performance, with a sensitivity of 875.71 μA·mM −1 ·cm −2 and a detection limit of 0.103 μM. • The sensor shows over 90% selectivity for glucose amid common interferents, along with excellent long-term stability and high repeatability. • The sensor's linear range is 0.15–9.45 mM, covering the physiological glucose window (3–6 mM) and extending to higher concentrations. Glucose electrochemical sensors underpin clinical diagnosis, biomanufacturing, food quality control and environmental surveillance. Covalent organic frameworks (COFs) are attractive for electroanalysis, yet nearly all COF glucose sensors require glucose oxidase immobilization, limiting long-term stability and scalability. Herein, we fabricate an enzyme-free glucose electrocatalyst: nickel phthalocyanine COF (pNiPc-COF) hybridized with graphene oxide (GO) via one-pot solvothermal treatment. XRD, SEM, FTIR, TGA and XPS confirm uniform pNiPc-COF/GO heterostructures; electroanalytical tests reveal strong synergistic glucose oxidation from dense Ni catalytic sites and fast charge transport in GO. At +0.65 V vs. SCE, the sensor achieves 5 s response over 0.15–9.45 mM glucose, with sensitivity of 875.71 μA mM −1 cm −2 and LOD = 0.103 μM (S/N = 3). It also exhibits strong anti-interference capability, offering a stable, high-performance enzyme-free platform for clinical glucose quantification. Download: Download high-res image (114KB) Download: Download full-size image
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高影响因子
Journal of Inorganic and Organometallic Polymers and Materials
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2023
·
IF 4
Zhang Xue-Feng,Chang Tian-Long,Guo Na,Jia Guo-Liang,Li Xiao-Bing,Zhao Zhao-Ye,Wang Hui,Wang Jun-Chuan,Wu Xiang-Feng,Pan Cheng-Si,Liu Lei,Yang Lin-Lin
Fe-based MOFs (Fe-MOFs) are excellent photocatalysts and have synergy well with Fenton reagents relative to other MOFs. In this work, a series of uniformly covered NH 2 -Fe-MIL-88B@TpPa-1-COF composites were synthesized using an in-situ anchoring growth strategy, which used F127 as functional molecule to decorate NH 2 -Fe-MIL-88B nanoparticles to eliminate their surface electrostatic repulsion with Tp molecules during the subsequent coating procedure. Meanwhile, the -NH 2 groups in the skeleton of NH 2 -Fe-MIL-88B could also be used as anchors to covalently connect TpPa-1-COF shell and migration channels for effective charge transfer. This uniformly covered core–shell structure would endow these composites with much more contact area and imine bond linkage between the Fe-MOFs core and COFs shell. Compared with the random packing structure, the uniformly covered Fe-MOF@COF-3 composite possessed a higher proportion of Fe 2+ to Fe 3+ . As a result, the optimized Fe-MOF@COF-3 catalyst could achieve the highest photo-Fenton degradation efficiency of 93.9% for tetracycline hydrochloride (TC⋅HCl), which was much higher than 54.8% of pure NH 2 -Fe-MIL-88B. In addition, the uniform TpPa-1-COF shell could further effectively enhance the stability of NH 2 -Fe-MIL-88B by protecting Fe ions from leaching, and the toxicity of the water samples treated with our photo-Fenton degradation process declined obviously. All these merits will endow Fe-MOF@COF-3 photo-Fenton catalyst great potential application value as in the field of environmental governance.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2023
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IF 6.2
Wenbo Si,Jilu Yang,Yuping Cao,Wenwu Qin
The covalent organic frameworks (COFs) have emerged as potential photocatalysts for solar-driven hydrogen evolution , but the disadvantage that photogenerated electrons and holes are prone to recombination limits their applications. Here, a rGO/BP/TpPa-1 high-low heterojunction with electron acceptors was prepared by integrating reduced graphene oxide (rGO) and black phosphorus (BP) into COF TpPa-1 to reduce the recombination rate of photoinduced charge carriers. The photocatalytic hydrogen evolution rate reached 18.09 mmol h −1 g −1 , about 3.3 times higher than pure TpPa-1. Here, a two-step photogenerated electron transfer mechanism is proposed. Firstly, a high-low heterojunction is formed between TpPa-1 and BP through an internal electric field from BP to TpPa-1, facilitating photogenerated electrons transfer from TpPa-1 to BP, then rGO attached to the BP surface acts as an electron acceptor, further collecting photogenerated electrons for reaction. This work provides a novel strategy for synthetizing efficient COF-based photocatalysts.
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JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2023
·
IF 10.9
Haozhen Zhang,Jingjing Liu,Yong Zhang,Bei Cheng,Bicheng Zhu,Linxi Wang
Constructing step-scheme (S-scheme) heterojunctions has become a popular strategy for efficient photocatalytic H 2 O 2 generation. Herein, we in situ grew BiOBr nanosheets (NSs) on a Schiff-base covalent organic framework (COF) with large π-conjugated structures to prepare S-scheme BiOBr/COF photocatalysts for H 2 O 2 synthesis. The highest photocatalytic H 2 O 2 production performance of the composite sample constituting the S-scheme heterojunction is 3749 µmol g −1 h −1 , which was 1.85 and 27 times the rates of COF and BiOBr, respectively. The construction of S-scheme heterojunction contributed to efficient carrier transfer and separation in space and enhanced redox power. Moreover, the lying-down O 2 -adsorption configuration on the COF surface favors the concerted two-electron O 2 reduction process, which greatly reduced the reduction potential requirement for O 2 -to-H 2 O 2 conversion. The synergy between the S-scheme heterojunction and the unique O 2 –COF interaction boosted photocatalytic H 2 O 2 production activity.
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JOURNAL OF MEMBRANE SCIENCE
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2023
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IF 9.5
Guangzhe Wang,Tao Wu,Junhui Zhao,Benbing Shi,Tianrun Gu,Runnan Zhang,Xiaoyao Wang,Roni Kasher,Yanlei Su,Zhongyi Jiang
Ionic covalent organic frameworks (COFs) hold great promise in regulating the structure of polyamide nanofiltration membranes for divalent ions removal. In this work, we demonstrate cationic COF (cCOF) nanosheets engineered polyamide membrane with excellent divalent cations rejection. cCOF nanosheets as versatile regulator and an interlayer accelerate the self-sealing and self-termination of interfacial polymerization between polyethyleneimine and trimesoyl chloride, endowing membranes with dense network and small thickness. Meanwhile, the quaternary ammonium groups on cCOF nanosheets increase positive charges on membranes. Through synergistic intensification of electrostatic repulsion and size sieving, the resulting cCOF-PA membranes display excellent rejection for divalent cations (MgCl 2 , 99.3%), superior to most reported polyethyleneimine-based polyamide membranes. This work highlights the significance of ionic COF materials in developing positively charged membranes for efficient ionic and molecular separations.
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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.
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高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2021
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IF 4.098
Zichen Yang,Chaoqun Ma,Jiao Gu,Yamin Wu,Chun Zhu,Lei Li,Hui Gao,Wenzhi Yin,Zirui Wang,Ye Zhang,Yunpeng Shang,Chengwei Wang,Guoqing Chen
Benzoic acid, which has a pivotal role in food additive, is prohibited to add as a preservative in dairy products. China, Brazil, and other countries have proposed standard methods to detect the addition of benzoic acid in food. Surface-enhanced Raman scattering (SERS) is an upcoming spectral detection technique, which has been widely used in the field of material analysis with the advantages of non-invasive, fast detection speed and complex environment with little interference. To detect the illegal use of benzoic acid in dairy industry, we developed Ag-COF (covalent-organic framework) material as SERS substrate to detect benzoic acid in liquid milk. The great enhancement ability of Ag-COF substrate is controlled by the addition of acetic acid and complex interplay between COF material and benzoic acid. This detection method has high sensitivity and reliability that allows us to achieve limit of detection (LOD) of 0.13 μg/mL in milk and 0.00372 μg/mL in water by applying this method. In experiment on recovery rate of real samples, the detection time is less than 15 minutes and the relative standard deviation (RSD) ranged from 2.82% to 5.69%. Therefore, this method has practical significance of the detection of benzoic acid in dairy products.
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高影响因子
Inorganic Chemistry Frontiers
·
2021
·Vol. 8
·期 7
·1686-1694
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IF 6.569
Jianlin Ren,Zhenglong Xia,Bifu Luo,Di Li,Weidong Shi
Accelerating light-induced carrier transfer and improving charge utilization are essential for enhancing the efficiency of solar hydrogen production. In this work, for the first time, 2D/2D covalent organic-framework (COF)/SnNb2O6 nanosheets were fabricated by a hydrothermal process. By adjusting the content of TpPa-2-COF, it was used to optimize the performance of solar hydrogen production. The optimal TpPa-2-COF/SnNb2O6 nanosheets show a hydrogen production rate of 7.66 μmol·h−1, which is 5.8-fold and 3.5-fold that of pristine SnNb2O6 and TpPa-2-COF, respectively. The significant improvement in the photocatalytic performance can be attributed to the formation of a 2D/2D heterojunction nanosheet with a good energy band position between TpPa-2-COF and SnNb2O6, which can efficaciously inhibit the restructuring of charge carriers. Through photoelectrochemical analysis, it is further proved that the interface interaction between TpPa-2-COF and SnNb2O6 can lead to effective charge separation. Moreover, the cycling experiments reveal that the as-prepared photocatalyst has excellent stability and recycling performance. This study shows that the smart integration of organic (COF) and inorganic materials into a heterojunction with a 2D/2D structure is an available tactic for the fabrication of efficient photocatalysts.
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Journal of Cleaner Production
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2024
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IF 9.7
Liushan Jiang,Yue Zhang,Shiyu Huang,Jingwen Niu,Huanhuan Liu,Shuai Yuan,Qingxiang Zhou
Polycyclic aromatic hydrocarbons (PAHs) and sulfur-containing heterocyclic aromatic hydrocarbons (PASHs) are typical organic pollutants that are commonly present in the environment. Due to the continuous accumulation and transfer in the food chain, they will pose a significant threat to human life and health. In the present work, a new method was constructed with a ternary magnetic nanocomposite (Fe 0 @MXene@COF-LZU1) based magnetic solid phase extraction in combination with gas chromatography-tandem mass spectrometry (GC-MS/MS) for sensitive determination of them at trace level in Chinese tea samples. The magnetic nanomaterial Fe 0 @MXene@COF-LZU1 was synthesized via reduction and Schiff base reactions. The experimental results demonstrated that Fe 0 @MXene@COF-LZU1 had high adsorption ability and satisfactory chemical stability. Under the optimal experimental conditions, the method possessed good linearity in the concentration ranges of 0.0005 μgL −1 - 50 μg L −1 for dibenzothiophene (DBT), phenanthrene (PHE), fluoranthene (FLT) and pyrene (PYR), and 0.001 μg L −1 - 50 μg L −1 for 4-methyldibenzothiophene (4-MDBT) and 4,6-dimethyldibenzothiophene (4,6-DMDBT). The detection limits of this method were in the range of 0.014 ng L −1 -0.83 ng L −1 . The results of real samples demonstrated that the designed magnetic nanocomposite had a promising application prospect for measuring PAHs and PASHs.
研究领域:
环境科学
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分析化学
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高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2022
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IF 5.141
Wei Qi,Qiaolin Wu,Wen Wang,Jing Feng,Qing Su
Covalent organic frameworks (COFs) with pre-designed structures and superior photophysical properties have attracted significant attention due to their applications in photocatalysis. In this research, an imine-linked fluorinated 2D-COF (TFA-TTA-COF) material was feasibly fabricated from polycondensation of 2,3,5,6-tetrafluoroterephthalaldehyde (TFA) and 4,4′,4′'-(1,3,5-triazine-2,4,6-triyl)trianiline (TTA) in solvent-thermal methods. The TFA-TTA-COF material exhibited excellent crystallinity, high Brunauer-Emmett-Teller surface area of 1504 m 2 ·g −1 , and superior thermal and chemical stability. Considering the advantages of enhanced light absorption, effective charge separation and charge transfer, the prepared TFA-TTA-COF was employed as photocatalyst for the degradation of dyes. The degradation efficiencies of Eriochrome Black T (EBT) and Eriochrome Black A (EBA) dye in water could attain 89 % and 82 %, respectively. Furthermore, TFA-TTA-COF was found to show satisfactory photocatalytic performance with high conversion and selectivity in the photo-driven oxidative coupling of benzylamines. This work demonstrated the important contributions to the development of heterogeneous COFs-based photocatalysts.
研究领域:
材料科学
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环境科学
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高影响因子
FOOD CHEMISTRY
·
2025
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IF 9.8
Shao-Hua Wen,Ning Wang,Ziqi Yuan,Hao Wu,Gege Yan,Hengyuan Zhang,Sha Yu,Junping Ma,Yuanzhen Zhou
The design of novel homogeneous electrochemical (HEC) sensors with dual-signal ratiometric response holds great potential for highly sensitive and reliable detection of arsenic in food matrices. Herein, COF-based hybrids were prepared by integrating methylene blue (MB) signals and MnO 2 nanozyme coatings, possessing the advantages of high signal loading, oxidase-mimicking activity, and ascorbic acid (AA)-specific recognition to realize ratiometric HEC detection of arsenate. The hydrolysate AA, produced from ALP-catalyzed AAP hydrolysis, could decompose MnO 2 coatings into Mn 2+ , and regulate MB release and o -phenylenediamine oxidation to 2,3-diaminophenazine (DAP). Furthermore, arsenate specifically inhibited ALP, subsequently restraining AA formation and MnO 2 decomposition. Consequently, a decreased MB current and an increased DAP current with opposite responses were regulated by arsenate compared with those without arsenate. Thus, this dual-signal ratiometric HEC sensor achieved sensitive detection of arsenate, with a LOD of 0.509 ppb. It was successfully applied to reliable detection of arsenate in complex food matrices.
研究领域:
食品安全检测
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分析化学
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电化学传感
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Journal of Materials Chemistry A
·
2019
·Vol. 7
·期 30
·18063-18071
·
IF 10.733
Jianliang Shen,Runnan Zhang,Yanlei Su,Benbing Shi,Xinda You,Weixiong Guo,Yu Ma,Jinqiu Yuan,Fei Wang,Zhongyi Jiang
Covalent organic frameworks (COFs) are emerging porous crystalline materials with regular and permanent channels for constructing high-performance molecular sieving membranes. However, fabrication of COF membranes on porous supports in a facile manner remains a great challenge. Herein, a polydopamine (PDA)-modulated bottom-up approach was proposed to fabricate an ultrathin sulfonated imine-linked COF layer (SCOF, synthesized by Schiff-base reaction of 1,3,5-triformylphloroglucinol with 2,5-diaminobenzenesulfonic acid) on a polyacrylonitrile (PAN) support. The PDA layer deposited on the support acted as a molecular linker that attracted and bound COF building monomers, thus facilitating SCOF nucleation and growth of a defect-free SCOF layer. An optimized PDA deposition time of 1 hour provides sufficient adsorption sites for COF monomers without introducing additional water transport resistance. The resultant SCOF/PDA/PAN membrane shows an excellent water permeance of up to 1346 L m−2 h−1 MPa−1 with desirable dye rejection (e.g., Eriochrome black T and Congo red, >99.0%), which is nearly 7–12 times higher than that of most membranes with comparable rejection in the literature. This facile and universal PDA-modulated approach can be extended to a broad range of COF membranes and many other kinds of framework-based membranes.
研究领域:
材料科学
·
化学工程
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