MICROCHEMICAL JOURNAL
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2024
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IF 4.9
Xiao Li,Xilang Jin,Liyuan Ma,Xuehao Ma,Qian Zhang,Haiyan Bai,Yiting Ma,Yulong Li,Weixing Chen,Mengyao She
Excessive H 2 O content in food will cause the hydrolysis of nutrients and provide a favorable environment for the growth of mycotoxins, thus, developing fast response, low detection limit, and high detection capacity sensors is urgently needed for food quality and safety. In this work, we developed two borate-ester-based covalent organic frameworks ( COF-5 and COF-10 ) with high specific surface areas (1189.0 m 2 ·g −1 and 1105.1 m 2 ·g −1 ), which exhibited rapid response ( COF-5 about 40 s and COF-10 about 35 s), good linearity ( COF-5 :R 2 =0.9981 and COF-10 :R 2 =0.9993), and low detection limits (LOD COF-5 =0.044 v/v% and LOD COF-10 =0.016 v/v%). DFT theoretical calculation demonstrated that H 2 O participated in the partial hydrolysis of the B-O bond, resulting in the enhancement of fluorescence. Based on the good fluorescence properties, these two probes had been successfully used to quantificationally detect H 2 O content in honey, corn starch, and milk powder with satisfactory results, indicating an excellent application potential in the food field.
研究领域:
材料科学
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食品安全
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分析化学
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产品关联
DOI
高影响因子
CHEMOSPHERE
·
2019
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IF 5.108
Shi-Wen Lv,Jing-Min Liu,Chun-Yang Li,Ning Zhao,Zhi-Hao Wang,Shuo Wang
Nowadays, the visible-light-driven photocatalysis via advanced photocatalyst for PS activation have promising applications in wastewater treatment . Herein, for the first time, two novel MOFs@COFs hybrid materials (denoted as MIL-101-NH 2 @TpMA and UiO-66-NH 2 @TpMA) with nitrogen-rich building blocks were fabricated via a feasible step-by-step assembly method, and then employed as efficient photocatalytic platform coupling with sulfate radical-based advanced oxidation processes for the degradation of BPA under visible light irradiation. Detailed analyses revealed that the hybridization of MOFs and COFs could greatly boost visible light absorption , while the heterojunction formed at the interface could effectively facilitate the separation and transfer of photogenerated electron-hole pairs. More importantly, the developed solar/MOFs@COFs/PS system exhibited the excellent degradation ability toward BPA, and an incredible degradation efficiency of 99% was eventually achieved. Possible mechanism for photocatalytic degradation of BPA was also proposed. Furthermore, the prepared composites with great reusability and stability possessed a broad potential for highly effective degradation of various organic contaminants . In short, this work not only demonstrated the combination of MOFs and COFs with C 3 N 4 active unit was a feasible strategy for improving photocatalytic activities in the degradation of organic contaminants, but also provided some novel inspirations for constructing high-efficient photocatalysts with heterostructure.
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF CHROMATOGRAPHY A
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2025
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IF 4
Xiupei Yang,Xin Zhou,Qingying Wang,Qiang Yang,Jiayu Wang,Lianfang Chen
The widespread use of fluoroquinolone antibiotics (FQs) in medical and agricultural applications has raised significant environmental and food safety concerns, necessitating the development of sensitive and reliable detection methods. This study presents an advanced analytical approach combining a novel hierarchical magnetic Metal organic framework@Covalent organic framework (MOF@COF) composite materials, named Fe 3 O 4 @NH₂-MIL-88(Fe)@TpBD (Fe 3 O 4 @MOF@COFs), with high-performance liquid chromatography-ultraviolet detection (HPLC-UV) for trace-level FQ determination. The composite was synthesized via a solvothermal method featuring in situ growth of covalent organic frameworks (COFs) on magnetic metal‒organic frameworks (MOFs) and exhibited exceptional performance in magnetic solid‒phase extraction (MSPE) of three target FQs (enrofloxacin, ciprofloxacin, and norfloxacin). The method achieved outstanding sensitivity (0.23–0.27 ng mL⁻¹), a wide linear range (0.70–1000 ng mL⁻¹), strong correlation (R² = 0.9996), and excellent repeatability (1.6–3.8 % RSD). Successful applications in tap water and chicken samples demonstrated recoveries of 85.8–112.2 %, whereas adsorption studies using pseudo-first-order, pseudo-second-order, Langmuir, and Freundlich models provided mechanistic insights into the extraction process. This work has the following advantages: (1) a graded magnetic adsorbent with good extraction efficiency was designed through the synergistic effect of MOF-COF, (2) a robust detection scheme with convenient and fast performance was established, and (3) the adsorption mechanism of recyclable materials was elucidated, thereby demonstrating excellent practical utilization. In summary, this MOF@COFs-MSPE-HPLC-UV method provides a sensitive, efficient, and sustainable solution for monitoring trace FQ pollutants in complex matrices, which is expected to promote the development of the environment and food safety.
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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材料科学
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2023
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IF 8.6
Shucheng Liu,Zhi Hu,Xingchen Yan,Senbai Geng,Xian Zhao,Hongxiang Ou,Jianming Pan
The magnetic boronate based sorbents have been widely used to separation of cis -diol containing flavonoids. However, It's still challenging due to its chemical structural fragility and low grafting efficiency. The major obstacles are low concentration, the hydrophobicity of flavoniods, and complexity of crude extract solutions. For solving these problems, a new kind of covalently connect MOF@boronic acid-functionalized-COFs core–shell hybrid composites based on magnetic colloidal nanocrystal clusters (MCNCs), MCNCs@NH 2 -UiO-66@BTCA-BA-COFs, with high surface area, abundant binding sites and excellent chemical and structurally stability were synthesized for enhancing the structure stability and selective recognition efficiency. The alkynylation COFs were not only to be facilely grated on the surface of magnetic microsphere@NH 2 -UiO-66 via Schiff-based reaction but also beneficial to the further modification of azide phenylboronic acid group via click reaction. Such mentioned advantages and covalently connect click strategy could generate highly structure stable and strong binding sites for the template flavonoids (Naringin, NRG). Adsorption equilibrium experiments were reached rapidly within 120 min, and the maximum equilibrium binding capacities of MCNCs@PDA@NH 2 -UiO-66@BTCA-BA-COFs were 31.20 µmol g −1 for NRG. Moreover, MCNCs@PDA@NH 2 -UiO-66@BTCA-BA-COFs exhibited a stronger selectivity towards NRG than other competitive targets (i.e rutin, catechol, hesperetin, o -nitrophenol). The MCNCs@PDA@NH 2 -UiO-66@BTCA-BA-COFs have shown outstanding reusability of 91.99 % loss in enrichment performance towards NRG after seven times repeatedly. The obtained MCNCs@PDA@NH 2 -UiO-66@BTCA-BA-COFs-based mass spectrum (MS) methods were applied to analyze the purity of NRG products. As excepted, a commercially available NRG with purity (approximately 60 %) could be effectively extracted and concentrated to 93.15 % purity. More interestingly, the separation performance of the sorbents was influenced by hydrophilic and hydrophobic performance. This approach provided an idea for constructing a new kind of hybrid sorbents with both enhanced functionality, suitable hydrophobic performance and fast magnetic-response behavior, which is of great significance to the field of separation and purification of hydrophobic flavonoids.
研究领域:
分离科学
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材料化学
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药物分析
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2023
·Vol. 34
·期 4
·1-12
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IF 2.8
Kang Ye-Wei,Fu Yun-Xuan,Liu Shu-Nan,Zhang Xue-Feng,Wang Hui,Yan-Li,Ma Xiao-Ye,Liu Lei,Wu Xiang-Feng
In 2.77 S 4 nanosheets were first synthesized and then used to construct the In 2.77 S 4 /COFs composite photocatalyst by an in situ hydrothermal growth method. The structure, optical properties, morphology, chemical composition and photo-generated carriers behavior of the as-synthesized In 2.77 S 4 /COFs composites were discussed, respectively. The tetracycline dilute solution was selected to evaluate its photocatalytic activity. Experimental results show that COFs can improve the photocatalytic activity and recyclability of In 2.77 S 4 under visible light irradiation. With the increase in COFs dosage, the photocatalytic efficiency of the as-synthesized composite samples is first increased and then decreased. When the amount of COFs is 10 wt%, the as-synthesized In 2.77 S 4 /COFs composite photocatalyst shows the maximum photocatalytic degradation efficiency of 93.8% in 90 min, which is higher than that of 75.1% of In 2.77 S 4 and 0.1% of COFs, respectively. Furthermore, the separation and migration efficiency of the photo-generated electron–hole pairs of the as-synthesized composite are improved in comparison of the pure samples and the transient photocurrent intensity of In 2.77 S 4 /COFs composite is about 2.5 times than that of pure In 2.77 S 4 and 10 times than that of pure COFs. In addition, holes play a major role during the photocatalytic degradation process.
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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产品关联
DOI
高影响因子
ANALYTICAL CHEMISTRY
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2025
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IF 6.7
Jialin Zhang,Biyao Mao,Shuoshuo Cheng,Kangqiang Lu,Herui Wen,Jiali Ren
Assessing the activity of DNA methyltransferases (MTases) and screening for methyltransferase inhibitors not only allow for a deep exploration of the role of methylation regulation in disease initiation and progression but also provide an important experimental and clinical basis for the diagnosis and treatment of diseases. Herein, a new COFs functionalized electrochemical biosensor has been developed to detect DNA adenine methylation (Dam) MTase activity with high sensitivity and rapidity by taking advantage of the DNA walker and rolled circular strand displacement amplification (RC-SDA) reaction. Specifically, hairpin probe H1 was methylated by Dam MTase, followed by methylation site-specific cleavage of DpnI enzyme to generate the S5 probe. The padlock probes with two nucleic acid endonuclease sites were introduced to trigger the RC-SDA reaction under the action of the primer, releasing a large number of single-stranded S6 probes. The released probe worked synergistically with the Exo III enzyme to trigger DNA walking, which exposed the binding sites to enable the Au-COF-MB signal probes to bind effectively to the electrode surface, and the electrochemical signals were thus generated. The result showed that the designed electrochemical biosensor demonstrated excellent sensitivity and specificity in detecting the activity of Dam MTase, with the detection limit (LOD) of 6.85 × 10–5 U/mL. This method provides support for the development of new treatment strategies for methylation related diseases.
研究领域:
分子生物学
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分析化学
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医学诊断
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产品关联
DOI
PubMed
高影响因子
CHINESE JOURNAL OF POLYMER SCIENCE
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2022
·Vol. 40
·期 4
·338-344
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IF 3.815
Yang Guang-Hui,Zhang Zhe,Yin Cong-Cong,Shi Xian-Song,Wang Yong
Two-dimensional covalent organic frameworks (COFs) with specific morphologies including nanofibers and nanoplates are highly desired in both nanoscience research and practical applications. Thus far, however, morphology engineering for COFs remains challenging because the mechanism underlying the morphology formation and evolution of COFs is not well understood. Herein, we propose a strategy of surfactant mediation coupled with acid adjustment to engineer the morphology of a β -ketoenamine-linked COF, TpPa, during solvothermal synthesis. The surfactants function as stabilizers that can encapsulate monomers and prepolymers to create micelles, enabling the formation of fiber-like and plate-like morphologies of TpPa rather than irregularly shaped aggregates. It is also found that acetic acid is important in regulating such morphologies, as the amino groups inside the prepolymers can be precisely protonated by acid adjustment, leading to an inhibited ripening process for the creation of specific morphologies. Benefitting from the synergistic enhancement of surfactant mediation and acid adjustment, TpPa nanofibers with a diameter down to ∼20 nm along with a length of up to a few microns and TpPa nanoplates with a thickness of ∼18 nm are created. Our work sheds light on the mechanism underlying the morphology formation and evolution of TpPa, providing some guidance for exquisite control over the growth of COFs, which is of great significance for their practical applications.
研究领域:
材料科学
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纳米技术
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化学工程
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产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
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2025
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IF 19
Bihong Chen,Yuehua Pan,Yuxiang Deng,Yunhao Hou,Haixuan Liang,Nannan Wang,Jun Luo,Kai Chen,Xinpeng Wang
Pyridine heterocyclic covalent organic frameworks (COFs) have attracted widespread attention in the field of photo-driven hydrogen peroxide (H 2 O 2 ) synthesis due to their unique optoelectronic properties and excellent electron affinity. In this study, the microenvironment change of COFs is achieved through the system regulation of pyridine content in its skeleton. Among these COFs, the bipyridine-structured TpDaBp exhibits the best visible-light-driven H 2 O 2 evolution rate of 8156 µmol g −1 h −1 and reveals significant potential for photocatalytic uranium extraction, attributed to its enhanced π–π interactions, improved optoelectronic performance, and enlarged specific surface area. This work not only provided a new strategy for further designing novel pyridine N-heterocyclic-based COFs but also shows its novel advantages of application.
研究领域:
材料科学
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光催化
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有机化学
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能源化学
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环境修复
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产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 45
·期 45
·21278-21284
·
IF 3.591
Yanqing Cong,Xiang Chen,Wanxing Wang,Shi-Wen Lv
The photocatalytic technique is an attractive strategy to activate persulfate for generating free radicals in the wastewater purification process. Herein, CdS nanoparticles with unique optical properties were employed to decorate the COF-based photocatalyst (denoted as TpMA) containing C3N4 active units via a feasible method. Interestingly, TpMA decorated with CdS nanoparticles exhibited enhanced optical absorbability and a small charge transfer resistance. Benefitting from the close interfacial connections between CdS nanoparticles and TpMA, the recombination of photogenerated electrons and holes could be effectively inhibited. As expected, the obtained CdS@TpMA composites displayed excellent photocatalytic activity, which could activate persulfate to produce SO4−˙ and ˙OH under visible light irradiation. In comparison with pristine CdS nanoparticles and TpMA, the 25% CdS@TpMA composite presented the best photocatalytic degradation ability, and 97.6% of diclofenac sodium, 95.2% of tetracycline and 93.8% of ibuprofen could be effectively removed within 70 min. The corresponding TOC removal efficiencies were more than 60%. More significantly, the 25% CdS@TpMA composite displayed great performance and structural stabilities. Furthermore, a possible photocatalytic mechanism was also proposed. In short, the current work not only provides a promising candidate for degrading drug residues, but also offers some novel viewpoints for further research.
研究领域:
环境科学
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材料科学
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化学工程
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DOI
高影响因子
FOOD CHEMISTRY
·
2023
·
IF 8.8
Guangyang Liu,Xuan Zhang,Jian Wang,Lingyun Li,Jiayong Cao,Chen Yin,Yuan Liu,Ge Chen,Jun Lv,Xiaomin Xu,Jing Wang,Xiaodong Huang,Donghui Xu
A novel biomimetic mineralized covalent organic framework (BM-COF) was prepared based on magnetic silk fibroin and a new sulforaphane pretreatment technology was constructed. First, metal coordination was performed on the surface of silk fibroin, and nanoparticles were deposited by in-situ mineralization after co-precipitation. Then, biomineralized COFs were prepared by in-situ self-assembly of a COF layer on Fe 3 O 4 @silk fibroin surface guided by interfacial directional growth technology. The BM-COFs had a multilayer structure, large specific surface area and pore volume, and superparamagnetic properties, which make them an ideal adsorbent. The adsorption of sulforaphane by BM-COFs is mainly multi-molecular layer adsorption and chemisorption, there might be electrostatic action, π-stacking and hydrogen bonding in the adsorption process. The composite material was successfully used for the pretreatment of sulforaphane in cruciferous vegetables. An extraction time of 30 min gave extraction efficiencies as high as 92%, and the recovery could reach more than 73%.
研究领域:
材料科学
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生物技术
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食品科学
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产品关联
DOI
PubMed
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2014
·
IF 3.209
Chiyao Bai,Juan Li,Songbai Liu,Xiaoyu Yang,Xiaodan Yang,Yin Tian,Kecheng Cao,Ying Huang,Lijian Ma,Shoujian Li
The present research developed a strategy for in situ synthesizing functionalized ultra-microporous carbons by “segregated” microwave irradiation using covalent organic frameworks as simultaneous C and N source. The products have high N-doping concentration (>30 wt%), narrow pore size distribution, and the surface area of 507 and 243 m 2 /g at the pore size of 0.4 and 0.6 nm, which are much larger than the specific area (2 and 117 m 2 /g) of samples prepared by conventional heating. They exhibit outstanding chemical, irradiation and thermal stabilities. Meanwhile, the carbonaceous COFs could retain the bulk morphology of the precursors and possess a unique functional group (cyano) which is helpful in material characters or in further modification. The findings support the potential use of “segregated” microwave irradiation in preparation of functional microporous carbons without any other additional process, and this method can also overcome the drawbacks of conventional heating and expand the range of microwave irradiation. The thus-prepared carbons were used as adsorbents for uranium recovery from a simulated nuclear effluent containing 12 co-existent cations with different pH value (4.5, 2.5 and 1.0). Results from batch experiments showed the amount of uranium adsorbed accounts for unreported 80% of the total adsorption amount at pH 1.0 with uranium sorption capacity of 50 mg/g. In addition, the carbonaceous COFs could be applicable to various fields, such as heavy metal removal, gas storage, and could be beneficial for exploration of the behaviors of ions in sub-nanometer pore (<1 nm) in the fields of carbon super-capacitors.
研究领域:
材料科学
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环境科学
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化学工程
·
核工程
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产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2020
·
IF 3.594
Jian Chen,Na Li,Jianghua Liu,Fuping Zheng
A facile and rapid magnetic solid phase extraction (MSPE) based on magnetic covalent organic framework and coupled with high performance liquid chromatography diode array detection (HPLC-DAD) has been developed for detection of 11 kind of polycyclic aromatic hydrocarbons (PAHs) in food samples. In this paper, the novel magnetic core-shell structured (Fe 3 O 4 @COFs) nanocomposites were consisted with the magnetic Fe 3 O 4 nanoparticles (NPs) as a core, and 1,3,5-tris (4-aminophenyl) benzene (TAPB) and 2,5-dihydroxyterephthalaldehyde (DP) as two ligands for building shell outside of the core. These new nanocomposites were applied as superior adsorbent to enrich the PAHs due to their merits of large specific surface area, highly porosity and excellent thermal stability. The conditions that may affect the enrichment efficiency in MSPE process, including desorption solvent, amount of sorbent , extraction time, desorption time and desorption adsorption volume were investigated systematically. By combining MSPE with HPLC-DAD, an effective method for the detection of trace PAHs was successfully developed, which exhibited good linearity with R 2 ranging from 0.9954 to 0.9988, satisfactory recoveries in the range of 83.2–119.3%, and the relative standard deviations (RSD) was lower than 5.8%. In addition, the proposed MSPE-HPLC-DAD method was shown excellent ability to enrich trace PAHs effectively in food samples and potential application in extract other aromatic compounds .
研究领域:
分析化学
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材料科学
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环境科学
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食品科学
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DOI
高影响因子
危险品化学品经营许可证（带存储）