APPLIED SURFACE SCIENCE
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2021
·
IF 6.707
Nan Zhang,Tao Bao,Yan Gao,Xianliang Xu,Sicen Wang
[email protected] composite was fabricated for greater adsorption capacity through the utilization of corncob, which is a natural, sustainable, and cellulose-rich resource. An in-situ growth strategy was implemented to graft UiO-66-NH 2 on carboxyl-terminal corncob induced by the thermal esterification of critic acid. Subsequently, [email protected] 2 @TpBD was constructed through the Schiff base reaction between 2,4,6-triformylphloroglucinol (Tp) and UiO-66-NH 2 as well as benzidine (BD). The ratio of UiO-66-NH 2 and TpBD was optimized to be 5:3 for enhancing adsorption capacity. Based on the π-π, hydrogen bonding, and -SO 2 -Zr-O- coordination effect, sulphonamides (SAs) were chosen to investigate the adsorption capacity of adsorbent using an in-syringe solid phase extraction (IS-SPE) method. The binding energy calculated using density functional theory (DFT) reached −37.45 Kcal/mol, which indicated the strong interactions between SAs and [email protected] 2 @TpBD. Combined with ultra-performance liquid chromatography (UPLC), a high sensitivity was obtained with low detection of 0.10 μg/L. The prepared [email protected] 2 @TpBD exhibited good reproducibility within relative standard deviations (RSDs) 3.1%-3.4% in intra-batch and 4.3%-8.4% in inter-batch. Moreover, the extraction capacity of adsorbent was not decreased in 20 recycles adsorption–desorption within RSDs 3.8%-8.5%. With features of permanent porosity, multiple active sites, and good renewability, [email protected] 2 @TpBD shows great potential towards industrial applications in the field of adsorption.
研究领域:
环境科学
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材料科学
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分析化学
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DOI
高影响因子
FOOD CHEMISTRY
·
2025
·
IF 9.8
Yingfei Hui,Yuli Wei,Hao Guo,Mingyue Wang,Liping Peng,Borong Ren,Yanyan Ma,Wu Yang
Glyphosate (Gly) overuse threatens public health and ecosystems, necessitating highly sensitive detection. This work developed a novel ratiometric fluorescent probe, CDs@Cu-MOF/TMTA-COF, by integrating carbon dots (CDs), metal organic frameworks (MOFs), and covalent organic frameworks (COFs). We encapsulated CDs within Cu-MOF in-situ grown onto sp 2 ‑carbon conjugated TMTA-COF. Gly binding to Cu 2+ causes MOF structural collapse, releasing CDs and enhancing its fluorescence at 425 nm. Simultaneously, Gly inhibits competitive absorption and acceptor-photoinduced electron transfer process between TMTA-COF and Cu-MOF, increasing COF fluorescence at 550 nm. This dual-signal change enables ratiometric Gly detection from 0.2 to 40 μM, with a detection limit of 0.07 μM. This probe was successfully used to measure Gly in soil, Yellow River water and soybean (recoveries: 95.3–104.1 %). Additionally, the back propagation neural network further enables fast detection of Gly. This work demonstrates the potential of MOF/COF hybrids for fluorescence sensing for pesticide analysis and paves the way for intelligent sensing platforms.
研究领域:
分析化学
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环境科学
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材料科学
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传感器技术
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纳米技术
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神经网络
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DOI
PubMed
高影响因子
Analytical Methods
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2024
·
IF 2.7
Dongping Rao,Luyan Meng,Xiuqin Sheng,Wenying Yu,Chuan-Fan Ding,Yinghua Yan
A hybrid material, M@C-Br@GMA@Glu, consisting of a porphyrin-based metal–organic framework-covalent organic framework (MOF@COF), has been meticulously synthesized using a post-synthetic modification approach. This advanced material has demonstrated exceptional effectiveness in glycopeptide enrichment, characterized by an impressively low detection limit (0.2 fmol μL−1), high selectivity (1 : 2000), and loading capacity for glycopeptides (100 mg g−1). In practical applications with complex biological samples, 210 glycopeptides associated with 87 glycoproteins from the serum of the healthy group, and 156 glycopeptides related to 85 glycoproteins from the serum of cervical cancer were identified after enrichment with M@C-Br@GMA@Glu. Subsequent genetic ontology analysis has elucidated the relationship between cervical cancer and glycosylation, focusing on biological processes such as complement activation, innate immune response mechanisms, and the structural dynamics of the extracellular matrix. The collective findings not only validate the material's proficiency in the sensitive and selective enrichment of glycopeptides, but also underscore its potential in biomarker discovery applications.
研究领域:
材料科学
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分析化学
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生物化学
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癌症研究
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DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2023
·
IF 8.6
Zhiliang Wu,Wei Li,Linlin Hou,Qiuming Wei,Huixing Yang,Yangyang Jiang,Dingyuan Tang
Metal-organic framework (MOF) and covalent organic framework (COF) hybrid materials have drawn much research attention in the field of photocatalysis due to their complementary advantages, massive specific area, customizable structure and performance, and suitable band gap. Herein, the MOF@COF hybrid platform with a novel sunflower-like strong π-π bond stacking was formed by introducing the preformed synthetic COF into the MOF precursor solution and modulating its morphology by vacuum thermal-assisted growth. More importantly, the synthesized MOF on the COF hybrid platform with multiple active centers exhibits excellent catalytic activity in the sacrificial agent-free photocatalytic CO 2 reduction reaction under simulated sunlight. Additionally, the maximum CH 4 yieldrate of the synthesized PCN-222-Cu@TpPa-1 (1:2) reached 21.27 μmol g -1 h -1 , with an AQY (apparent quantum yield) about 10.46 % (in pure water system, λ = 550 nm) and a methane selectivity of about 27.25 %. The best performance of PCN-222-Cu@TpPa-1 is approximately 4.3 times higher than that of pure PCN-222-Cu and 100 times higher than that of the reported NH 2 -MIL-125(Ti) NMB. The selectivity of the products CO and CH 4 can be improved by adjusting the ratio of MOF and COF. Finally, the goal of providing an optimal photocatalytic platform for increased photocatalytic CO 2 reduction with highly effective morphology-tunable MOF@COF was expanded upon by a potential photocatalytic reaction mechanism, which was suggested based on the analysis of experimental results.
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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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Huizhen Sun,Xiuhua Chen,Shaoyuan Li,Wenhui Ma,Xiumin Chen,Dandan Wu,Kaixin Fu,Mingjun Xiao,Ming Wen
Developing efficient and selective recovery of Pd(II) adsorbents is crucial for addressing environmental pollution issues. Among them, covalent organic framework (COF) and metal organic framework (MOF) composites due to the multi-site functional groups are expected to exhibit excellent Pd(II) adsorption. However, the design and preparation of COF and MOF composite adsorbents for highly efficient adsorption of heavy metal Pd(II) still face many challenges. Herein, we constructed a series of novel core–shell structure UiO-66-NH 2 @TAP-COF (denoted as M@C) adsorbents (M@C-X, X = 1–5, representing different MOF doses) by Schiff base reaction and applied in the adsorption of Pd(II). The findings indicated that the M@C-3 exhibited ultra-high adsorption performance, reaching a capacity of 2134.1 mg/g, and displayed excellent selectivity, making it the best among similar materials. Experimental data and density functional theory (DFT) calculations revealed that the efficient and selective adsorption of Pd(II) is attributed to coordination interaction and strong electrostatic between Pd(II) and the abundant N and O groups in M@C. This work demonstrates the significant potential of the constructed core–shell M@C composites for the efficient and selective recovery of precious metal Pd(II).
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
Journal of Inorganic and Organometallic Polymers and Materials
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2023
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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.
研究领域:
材料科学
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环境科学
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催化
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DOI
高影响因子
Polymers
·
2024
·Vol. 16
·期 4
·539
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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
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光催化技术
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产品关联
DOI
PubMed
高影响因子
ACS Nano
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2023
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IF 17.1
Yite Li,Liqian Liu,Tian Meng,Lei Wang,Zhigang Xie
Sunlight-driven photocatalytic filters against pathogenic bioaerosols have attracted a lot of interest. However, developing an efficient interception system that shows enhanced visible-light harvesting, controllable charge dynamic, and boosted ROS generation remains a grand challenge. Here, we designed an ionic ZIF-8@iCOF nanocomposite as a sunlight-driven photocatalytic filter through elaborate structural engineering of the heterointerface between ZIF-8 and cationic iCOF layers. The photoactive experiments reveal significant improvements in the visible light absorption and sunlight-driven exciton-enhanced intersystem crossing to boost the generation of singlet oxygen (220%) and also obtain antibacterial efficiency of 99.99999% after 15 min irradiation. After combining with commercial polymer, resultant ZIF-8@iCOF/polyacrylonitrile (PAN) fibrous membranes exhibited high interception efficiency for both PM10 and PM2.5 (98%), being close to the commercial N95. This fibrous membrane also possesses good biocompatibility and strong elimination of bacteria under sunlight conditions, satisfying for the long-lasting contact usage. This finding not only showcases the promise of the porous materials-based fibrous membranes for efficient photocatalytic filter against pathogenic bioaerosols but also highlights the importance of accurate structural engineering for the advancement of sunlight-driven photocatalytic systems in environment and energy-related fields.
研究领域:
材料科学
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环境科学
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纳米技术
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光催化
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2026
·
IF 6.7
Jinyi Hu,Hongtao Zhou,Siyan Lv,Jiaming Wu,Baochen Tian,Yuehong Zhang,Caisheng Li,Zhihuan Zheng,Zejie Zhang,Xinjun Bao
Developing cost-effective bifunctional oxygen catalysts with robust activity and stability remains a core challenge for rechargeable zinc-air batteries (ZABs), primarily hindered by the slow kinetics of oxygen reduction/evolution reactions (ORR/OER). Herein, we report a Fe/Co-based composite catalyst, P-Fe-ZIF67@PI-COF-T (T represents calcination temperature), which is constructed by using a polyimide-based covalent organic framework as a support, followed by phosphorization and high-temperature pyrolysis of ZIF67 (zeolitic imidazolate framework67). Electrochemical measurements demonstrate outstanding bifunctional performance: an ORR half-wave potential (E 1/2 ) of 0.81 V, an OER overpotential of 250 mV at 10 mA cm −2 , and a ΔE of 0.67 V. The corresponding ZABs exhibit a high peak power density of 142.8 mW cm −2 and long-term durability for 300 h. Systematic analysis attributes the excellent performance to the synergistic effects of N/P co-doping induced defects, and the graphitized carbon layer. This study provides a rational design principle for advanced non-noble metal catalysts.
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DOI
高影响因子
Food Analytical Methods
·
2020
·Vol. 13
·期 6
·1346-1356
·
IF 2.667
Chen Zhipeng,He Zhaolin,Luo Xiaogang,Wu Fengshou,Tang Sheng,Zhang Juan
Covalent organic framework (COF) was decorated on the surface of magnetic metal organic framework (MOF) to yield novel MOF@COF hybrid magnetic nanospheres, which were employed as a magnetic adsorbent for extraction of sulfonamides (SAs) in food and environmental samples. The morphology and structure of the synthesized hybrid nanospheres were characterized by transmission electron microscopy, X-ray diffraction, Fourier transform infrared spectra, and nitrogen physisorption. Conditions for magnetic solid phase extraction for SAs were optimized by using the MOF@COF hybrid magnetic adsorbent. By coupling with high-performance liquid chromatography, a facile and sensitive method was developed for the determination of six SAs, showing good linearity in the range of 10–2000 ng/mL with R 2 > 0.99, high sensitivity with LODs of 0.1–0.5 ng/mL, and high reproducibility with RSDs < 3.9%. The established method was also applied to the rapid and efficient extraction of SAs in real samples such as tap water, pork, chicken, and shrimp samples.
研究领域:
分析化学
·
材料科学
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环境科学
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DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
Yu Gan,Wenwen Lai,Mengbo Fan,Zhengchao Duan,Lianzhi Wang
A novel core–shell structured NH 2 -MIL-88(Fe)@TFPT-Tt-COF composite was successfully constructed via an in situ growth strategy, enabling intimate interfacial bonding and synergistic effects between the MOF core and the COF shell. • The composite exhibits dramatically enhanced fluorescence compared to the individual MOF or COF, and acts as a “turn-off” sensor for nitrofurantoin (NFT) with an ultralow detection limit of 0.18 μg·mL −1 based on the inner filter effect. • The sensing platform features rapid response (equilibrium within 1 min), excellent selectivity against common metal ions and antibiotics, and good applicability in real samples with recoveries of 84.3%–107.6% in soil and lake water. • Offers a new strategy for applying MOF@COF heterostructures to the on-site, rapid, and sensitive detection of trace antibiotic residues in complex environmental matrices. A core-shell structured NH 2 -MIL-88(Fe)@TFPT-Tt-COF composite was successfully constructed via an in situ growth strategy, using NH 2 -MIL-88(Fe) as the core and TFPT-Tt-COF as the shell. The structure, morphology, and thermal stability of the composite were systematically characterized by Fourier transform infrared spectroscopy, powder X-ray diffraction, scanning/transmission electron microscopy, thermogravimetric analysis, and nitrogen adsorption–desorption measurements. The results confirmed the intimate interfacial bonding between the MOF core and the COF shell. Compared with the individual components, the composite displayed significantly enhanced fluorescence intensity. A fluorescent sensing platform based on this composite was developed, which enabled highly sensitive and selective detection of nitrofurantoin (NFT). Preliminary mechanistic studies revealed that the quenching effect mainly originated from a photoinduced electron transfer (PET) mechanism. The proposed method was applied to the spike recovery analysis of NFT in real samples such as soil and lake water, yielding recoveries ranging from 84.3% to 107.6%, with a limit of detection as low as 0.18 μg·mL −1 , demonstrating that the sensor possesses satisfactory accuracy and practicality in complex environmental matrices. This work provides a new strategy for the application of MOF/COF composites in the rapid detection of antibiotic residues in the environment. Download: Download high-res image (167KB) Download: Download full-size image
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2026
·
IF 19.7
Xin Yu,Xinqi Luan,Xuehui Jia,Ruimeng Wang,Yaofei Ren,Yang Hu,Jiahua He,Zhongxing Zhao,Zhenxia Zhao
Designing the photocatalyst that possesses both efficient diluted carbon dioxide (CO 2 ) enrichment and photocatalytic conversion capabilities is a key challenge for the direct utilization of low-concentration CO 2 (15%) from flue gas. Herein, we proposed an interlayer ligand insertion strategy to construct a high-density integrated adsorption-catalysis system between NH 2 -UiO-66(Zr) (U66N) and functionalized TPB-DMTP-COF with benzoic acid groups (COF-T) for highly efficient photocatalytic diluted CO 2 reduction. In the photocatalytic CO 2 reduction reaction, the diluted CO 2 was first adsorbed and enriched to the microporous structure constructed between COF-T and U66N. Simultaneously, the two-dimensional COF-T acts as the primary light-harvesting component, preferentially capturing photogenerated electrons and holes under visible light and directing their transport to the catalytic interface of the three-dimensional U66N through steric-hindrance-induced distorted coordination linkages. Then the CO 2 molecules progressively activated by using the delivered electrons and H + , ultimately converting into CO. This ordered high-density integration architecture of COF and MOF concurrently optimizes light absorption and charge transfer pathways, enables precise regulation of the catalytic centers, and thereby substantially lowers the energy barrier for the formation of the *COOH intermediate in the photocatalytic CO 2 reduction, resulting in enhanced overall catalytic performance. Consequently, COF-T/U66N achieves a remarkable CO production rate of 65.0 µmol·g -1 ·h -1 under diluted CO 2 (15%), with near-unity (∼100%) selectivity and without adding any photosensitizer and sacrificial agent, surpassing state-of-the-art inorganic or porous photocatalysts by 5–40 times. This work not only provides a feasible strategy for the efficient photocatalytic reduction of low-concentration CO 2 but also offers a universal method for the design of MOF/COF composite materials.
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高影响因子
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