Nano Materials Science
·
2025
·
IF 17.9
Yuqian Song,Ding Yuan,Minghui Wang,Han Diao,Wenjing Sun,Xin Ning,Senjie Dong
The exploration of non-precious metal electrocatalysts with superior oxygen reduction reaction (ORR) activity is a key but significant challenge for industrialization of rechargeable zinc-air batteries (ZABs). Herein, we rationally design an efficient and stable ORR catalyst based on CuFe alloy nanoparticles embedded in N-doped carbon nanofibers (CuFe-NHPC/CNFs) that derived from covalent organic framework/metal organic framework (COF/MOF) hybrids. Merited from strong synergistic effect of multiple active sites and advantage of three-dimensional hierarchical porous structure, CuFe-NHPC/CNFs electrode exhibits outstanding ORR activity in alkaline media, with a half-wave potential ( E 1/2 = 0.88 V) and electrocatalytic stability (91 % current retention after 950 min). The above results reveal that overall performance of CuFe-NHPC/CNFs catalyst outperforms both commercial Pt/C and non-precious metal electrocatalysts reported recently. Impressively, aqueous ZAB driven by CuFe-NHPC/CNFs delivers a peak power density of 207 mW cm −2 and cycling stability over 300 h. Furthermore, corresponding solid-state ZAB displays appealing discharge capability, energy storage ability and flexibility, and can power wearable electronic devices such as safety warning lights under different deformation. This study offers a reliable idea for fabrication of low-cost and high ORR activity non-precious metal electrocatalysts from MOF/COF hybrids, which is important for development of efficient energy conversion and storage systems.
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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.
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Journal of Physical Chemistry C
·
2024
·
IF 3.3
Yu Xia,Guofang Huang,Yan Fan,Xiaolong Zhao,Lei Wang,Jingwei Huang,Houde She,Qizhao Wang
Semiconductor heterojunctions could accelerate carrier separation and transfer for improving light-to-hydrogen (LTH) conversion efficiency. However, the lack of tight and efficient interfacial charge cross in three-dimensional semiconductor-based heterojunctions limits their practical application and the relevant profound understanding of the interfacial charge delivery. In this work, porphyrin (Cu)-based COF with a highly conjugated structure was deposited onto three-dimensional (3D) ZnIn2S4 by a facile solvothermal method to prepare a 3D/2D ZnIn2S4@CuP–Ph COF heterojunction. The content-optimized ZnIn2S4@CuP–Ph COF composite showed an excellent LTH conversion rate of up to 2667.94 μmol g–1 h–1, about 13.5 times higher than that of pristine ZnIn2S4. The significantly meliorated photocatalytic performance is attributed to the synergistically functioning contributors, that is, the fast interfacial charge transfer and the augmented light capturing capability after integration. Also, the work function results by DFT calculation reveals that the electrons of CuP–Ph COF (Φ = 4.41 eV) transfer from the interface electron delivery channels of the two components to ZIS (Φ = 7.03 eV) until the Fermi level of the two components reaches equilibrium. This moment, the work function of ZnIn2S4@CuP–Ph COF (Φ = 6.50 eV) lies between the two components, and an electron accumulation region is formed on the side of ZIS. Additionally, the free-energy barriers of hydrogen evolution dominated by ZnIn2S4@CuP–Ph COF (0.0955 eV) is much lower than that of ZnIn2S4 (0.1256 eV). This study possesses certain guiding significance for the design of organic–inorganic heterojunction photocatalysts for efficient LTH conversion.
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Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Wei Hu,Minghao Ma,Bin Du,Yikan Zhao,Jiang Wang,Bing Liu,Xihui Mu,Zhangyan Hu,Zhihao Yi,Zhaoyang Tong
Staphylococcal enterotoxin B (SEB), a major foodborne toxin and bioterrorism agent, poses significant threats to global public health security. To address the urgent need for rapid on-site detection, we report an electrochemical molecularly imprinted sensor based on magnetic core-shell architecture, where two porous framework materials are covalently integrated as the imprinted matrix. The sensor exhibited high selectivity, showing a wide linear range from 5 × 10 −11 to 5 × 10 −5 g·mL −1 and a low detection limit (LOD) of 1.6 × 10 −12 g·mL −1 . Excellent stability and reproducibility were demonstrated in the analysis of spiked milk and water samples. Furthermore, the proposed imprinted nanomaterial exhibited satisfactory results in milk and water samples. Additionally, a portable smartphone-based sensing platform was constructed by integrating the Fe 3 O 4 @MOF@COF@MIP. This platform enabled the on-site determination of SEB with a LOD of 3.3 × 10 −12 g∙mL −1 . The combination of novel magnetic molecularly imprinted composites with mobile detection technology provides a powerful, field-deployable tool for SEB monitoring, advancing the application of multifunctional nanomaterials in biosensing and biodefense.
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Nano Materials Science
·
2026
·
IF 17.9
Yingying Wang,Shangmin Si,Taipeng Jiang,Sheng Chen,Jingjing He,Jianyong Tang,Jian Wu,Weijie Wei,Lingling Zeng,Jin Li,Zhuwei Gao
Frequent oil spills pose severe environmental and ecological threats, necessitating the development of materials capable of effective all-weather remediation of high-viscosity crude oil. In this study, a self-assembly strategy was employed to integrate covalent organic framework (COF) and polypyrrole (PPy) on a flexible cotton fabric (CF). Subsequent hydrophobic modification with polydimethylsiloxane (PDMS) produced a multifunctional composite membrane (PDMS@PPy@COF@CF) that integrated photothermal conversion, electrothermal response, and superhydrophobicity. The membrane exhibited excellent superhydrophobicity (WCA = 153.5°), superior oil-water separation efficiency (≥98.5%), and a high separation flux (≥24 010.4 L m – 2 h –1 ). Notably, the construction of micro/nanostructures via π-π stacking and hydrogen bonding between PPy and COF layers endowed the material with outstanding photothermal and electrothermal conversion performances. Specifically, the surface temperature rapidly increased to 73.8 °C within 180 s under 1.0 kW m – 2 irradiation and attained 145.9 °C at 10 V. Synergistic utilization of photothermal (0.5 kW m – 2 ) and electrothermal (4 V) effects enabled rapid crude oil adsorption within merely 45 s. Furthermore, the composite membrane maintained stable conductivity and superhydrophobicity under mechanical strain, ensuring its reliability and durability for practical applications. In summary, the multifunctional PDMS@PPy@COF@CF membrane enables energy-efficient all-weather cleanup of high-viscosity crude oil spills with practical oil recovery potential.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Xinqi Luan,Xuehui Jia,Syed Jalil Shah,Jingyu Bao,Xin Yu,Ruimeng Wang,Zhongfeng Shi,Qi Pan,Liqin Zhou,Zhongxing Zhao,Zhenxia Zhao
Addressing the significant technical hurdle of efficiently capturing mixed-component volatile organic compounds (VOCs) in real-world environments is indispensable. An innovative synthesis strategy for three-dimensional high positive potential (3D-HPP) has been proposed to develop MOF composites (U66N-FT/COF) for the synergistic adsorption of toluene and formaldehyde (FA). Structural and density functional theory (DFT) simulation analyses revealed that the thiophene, amide, and amino sites in U66N-FT/COF synergistically captured FA and toluene. This phenomenon of VOCs capture occurred through π-π conjugation and electrostatic interactions, significantly reducing the competitive adsorption effect among VOCs molecules. Interestingly, the preferential adsorption of FA molecules created secondary adsorption sites for toluene molecules, thereby augmenting the adsorption capacity of toluene by 47.2 % through the dynamic and synergistic mechanism of “Adsorption-Induced-Resorption”. Furthermore, the COF unit in U66N-FT/COF acted as a hydrophobic barrier, significantly impeding the diffusion of H 2 O molecules in the pores and thus effectively weakening the competitive adsorption of H 2 O to VOCs. The experimental findings implied that the U66N-FT/COF composites possessed a remarkable synergistic adsorption activity with a total adsorption capacity of 2.15 mmol/g and a synergistic adsorption coefficient α of 1.11 for the mixed-component VOCs. This study provides an important technical approach and theoretical guidance for addressing the synergistic treatment of multicomponent VOCs in practical scenarios.
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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.
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PubMed
高影响因子
CHEMOSPHERE
·
2021
·
IF 7.086
Yanan Yang,Yu Zhang,Hong Zheng,Baichao Zhang,Qi Zuo,Kaiyue Fan
A key challenge in trace heavy metals removal from drinking water by adsorption technology is to achieve high adsorption capacity and rapid uptake speed of adsorbent. Herein, we report a functionalized double modified covalent organic framework (DMTD–COF–SH) bearing high-density sulfur and nitrogen chelating groups provided simultaneously by 2,5-dimercapto-1,3,4-thiadiazole (DMTD) and 1,2-ethanedithiol, which was prepared via a facile one-pot thiol-ene “click” reaction. PXRD , FTIR, XPS, SEM, BET and 13 C MAS NMR confirmed their successful graft, and DMTD was found to be more easily grafted on the COF surface layer than 1,2-ethanedithiol. The as-prepared DMTD–COF–SH showed remarkable adsorption capacity and ultrafast uptake dynamics to trace heavy metals owing to the synergistic effects resulting from densely populated sulfur and nitrogen chelating groups within ordered COF mesopores and at the COF surface. On the basis of the drinking water treatment units standard NSF/ANSI 53–2020, when the adsorbent dosage was 10 mg/30 mL and 20 mg L −1 calcium ions coexisted, the lead concentration decreased from initial 150 μg L −1 to 2.89 μg L −1 within 10 s, far below the allowable limit of world health organization (WHO) drinking water standard (10 μg L −1 ), and the maximum adsorption capacity meeting the standard attained 14.22 mg g −1 . The adsorbent also exhibited excellent stability, wide applicable pH range and outstanding adsorption performance for coexisting trace lead, mercury, cadmium, chromium (VI) and copper in tap water, indicating that the DMTD–COF–SH material has excellent application prospect for trace heavy metals removal from drinking water.
研究领域:
环境科学
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材料科学
·
水处理
·
化学工程
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FOOD CHEMISTRY
·
2026
·
IF 10.4
Xuran Zhang,Rongxian Ma,Zhili Li,Jing Cao,Haoqi Ma,Yeyu Wu,Xuecai Tan,Kejing Huang
The excessive use of sulfadiazine (SDZ) poses significant health risks due to toxic residues in food and ecosystems. This work introduces a novel molecularly imprinted polymer (MIP) sensor featuring a carbon dot-based covalent organic framework (CD-COF) core as a high-performance electrochemiluminescence (ECL) emitter. Upon SDZ rebinding to imprinted sites, the sensor leverages SDZ's inherent redox activity to enable complementary differential pulse voltammetry (DPV) detection alongside ECL quenching. This dual-signal output establishes an intrinsic cross-validation mechanism that inherently corrects environmental interferences. The sensor achieves ultrasensitive detection of SDZ, with impressively low detection limits of 0.28 nM (ECL) and 1.6 nM (DPV). Validation in food matrices demonstrates exceptional accuracy and reliability, yielding recoveries of 91–110%. This study not only provides a robust tool for trace SDZ monitoring but also establishes a new paradigm for CD-COF-powered MIP sensors integrating dual-mode signals for highly reliable contaminant analysis in real-world samples.
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ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2023
·Vol. 415
·期 27
·6771-6783
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IF 4.3
Ma Wanwan,Chen Huan,Hou Hongwei,Hu Qingyuan,Bai Yu
Phosphatidylcholine (PC) and lysophosphatidylcholine (LPC), two types of phospholipids (PLs), have been reported to be closely correlated with head and neck cancers of laryngeal cancer (LC) and thyroid cancer (TC), which make their analysis crucial. TiO 2 @COF-based solid-phase microextraction (SPME) coupled to UHPLC-MS/MS was developed for the rapid and accurate detection of seven potential PL biomarkers from small amounts of serum in this work. The combination of TiO 2 and COF proves to be effective for the extraction of the target analytes. Under optimal conditions, the developed TiO 2 @COF-based SPME-UHPLC-MS/MS method revealed good linearity ( R 2 ≥ 0.997) with LODs ranging from 0.05 to 0.38 ng/mL for PLs, the extraction recoveries and matrix effects ranging from 83.09–112.03% and 85.38–113.67%, respectively. As a high-throughput pretreatment method, satisfactory probe-to-probe reproducibility rates of 2.7–10.1% were obtained. Finally, the TiO 2 @COF-based SPME-UHPLC-MS/MS method was applied to analyze LPC 14:0, LPC 16:0, LPC 18:0, LPC 18:1, LPC 19:0, PC 16:0/18:1, and PC 18:0 in serum samples from early LC patients ( n = 15), early TC patients ( n = 15), and healthy volunteers ( n = 15). The results indicated that cancer patients could be effectively differentiated from healthy controls using orthogonal partial least squares discriminant analysis (OPLS-DA). In conclusion, the established TiO 2 @COF-based SPME-UHPLC-MS/MS method is reliable for the rapid determination of the seven PLs in serum samples, which is promising for early diagnosis of head and neck cancers. Graphical abstract
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JOURNAL OF MEMBRANE SCIENCE
·
2020
·
IF 7.183
Xiaochang Cao,Haoqing Xu,Songlin Dong,Jiayou Xu,Zhihua Qiao,Song Zhao,Jixiao Wang,Zhi Wang
In this work, we proposed a simple method to prepare high-performance and pressure-resistant mixed matrix membranes (MMMs) for CO 2 /H 2 separation. The groups or segments of poly-(vinylamine) (PVAm) were used to modify covalent organic frameworks (COFs), and COFs with similar frameworks but different surfaces were obtained. Then, modified COFs were mixed with PVAm matrix and used to coat the modified-polysulfone (mPSf) to prepare MMMs for CO 2 /H 2 separation. Modified COFs and the PVAm matrix were highly compatible because COF surfaces possessed the same groups or segments as PVAm. Meanwhile, in the coating solution, COF surfaces were found to induce penetration of PVAm molecules into COF pores, narrowing the pore size of the COFs and providing an amino environment for CO 2 preferential absorption and transport. The penetration degree was affected by the hydrogen bond between COF surfaces and the PVAm molecules. In addition, the incorporated COFs effectively restricted the mobility of the PVAm matrix, increasing the pressure resistance for MMMs under high pressure. In the gas permeation test, the optimal MMMs could achieve a CO 2 permeance of 957 GPU and a CO 2 /H 2 selectivity of 17.1 at 2.0 MPa because of the high compatibility and size of the channels (0.94 nm).
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RSC Advances
·
2025
·Vol. 15
·期 11
·8111-8120
·
IF 4.6
Hao Zhang,Weihao Ma,Chunyu Qiang,Jiayuan Nie,Ling Ma,Yawei Zhang,Ke Wang
In our research, an emerging magnetic covalent organic framework (Fe3O4@SiO2–BD–DADB-COF) was formulated through Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), etc. Several parameters affecting the extraction process were refined. Accordingly, a novel method of determining 15 macrolides (MALs) in honey and water was established through the Fe3O4@SiO2–BD–DADB-COF as a magnetic solid-phase extraction (MSPE) adsorbent and ultra-performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS). In consequence, the standard curves for the 15 MALs exhibited an exceptional linearity from 0.1 to 200 μg L−1, and the correlation coefficients (R2) varied from 0.9990 to 0.9999. The recoveries fell between 70.01% and 115.56%, with the relative standard deviations (RSDs) being below 9.93% (n = 5). The detection limits reached 0.001–0.075 μg L−1 with the quantification limits being 0.004–0.228 μg L−1. Ultimately, the method was excellently applied to the analysis of MALs in honey and water.
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