Journal of Environmental Chemical Engineering
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2023
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IF 7.7
Chen Hou,Daozhen Cheng,Shengyang Zou,Junyi Gao,Jianzhi Wang,Yang Wang
Phenol is highly toxic and can cause damage to humans and the ecosystem even at low concentrations. Therefore, developing a rapid, sensitive and easy operated detection strategy still faces challenge. In this work, the covalent organic frameworks (COFs)-reinforced peroxidase-mimicking hybrid nanozyme was rationally designed by assembly COFs on magnetic Fe 3 O 4 @ZIF-8 nanozyme. The Fe 3 O 4 @ZIF-8 @COF hybrid nanozyme exhibited significant improved catalytic activity and can be developed as a rapid and sensitive phenol colorimetric sensor with ease operation. The core-shell structure and the crystallinity of the as-prepared hybrid nanozyme were characterized in detail by various analytical methods SEM, TEM , FT-IR, XRD and elemental mapping. The catalytic activity of Fe 3 O 4 @ZIF-8 @COF mimic enzyme was investigated in the presence of H 2 O 2 using 4-aminoantipyrine (4-AAP) as the substrate. The developed Fe 3 O 4 @ZIF-8 @COF hybrid nanozyme was applied to construct colorimetric sensor for phenol detection and the result presented high selectivity , excellent stability and good reusability with a wide linear range (6–350 μM), low detection limit (2 μM) and an advantageous response time (5 min). The designed catalyst makes the enhancement of peroxidase-like activity, which can be attributed to the unique core-shell structure with the inner catalytic site and the outer protection and enrichment COF shell. Therefore, this proposed colorimetric sensor with robust, stable and easy-recycled properties displayed excellent practical significance for the fast and sensitive detection of phenol in water environment.
研究领域:
环境科学
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生物化学
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2023
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IF 8.6
Xuemei Wang,Zhen Zhang,Jing Ru,Pengfei Huang,Yuan Ma,Jie Zhang,Xinzhen Du,Xiaoquan Lu
In view of the serious carcinogenic, teratogenic and mutagenic properties of polycyclic aromatic hydrocarbons (PAHs), which cause significant harm to human beings and the environment. Therefore, developing rapid adsorption and efficient analytical methods are research topic with practical significance. Herein, an innovative MOFs@COFs-based molecular trap materials were prepared with hierarchical porous core–shell structure and used as solid-phase microextraction (SPME) fiber coating, which combined with high performance liquid chromatography (HPLC) to achieve the efficient separation, capture, and detection for 7 PAHs in real samples. The possible adsorption mechanism was systematically verified and explained. Under the optimized conditions, the method developed in this experiment had a wide linear range (0.005–400 µg·L −1 ) with a good linear correlation coefficient (R 2 > 0.9984), low detection limits (0.002–0.405 µg·L −1 , S/N = 3) and low quantification limits (0.005–1.351 µg·L −1 , S/N = 10). The relative standard deviations of individual fibers and different batches of fibers were 0.26–3.64% and 0.40–5.91%, respectively. Besides, the fiber showed higher enrichment capacity and extraction efficiency for PAHs compared to commercial SPME fibers and other material fibers, and exhibited excellent acid-base stability and reproducibility. This work provided a favorable synthetic pathway for the preparation of MOFs@COFs composites by layer-modified assembly synthesis strategy, showed excellent practical applicability as a SPME fiber coating combined with HPLC, and could be realized to provide technical support for future studies on the separation, adsorption, and analysis of PAHs in the petrochemical industrial zone of the Yellow River Basin.
研究领域:
环境科学
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分析化学
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DOI
高影响因子
CHEMOSPHERE
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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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DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2022
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IF 9.965
Jiajia Wang,Lizhi Wang,Du Zhang,You Wang,Jiawei Li,Fa Zhou,Jianhan Huang,You-Nian Liu
Herein, the covalently connected core–shell metal–organic frameworks (MOFs)@covalent-organic frameworks (COFs) hybrid materials were successfully constructed by coating the stable COF-OH shell on the NH 2 -MIL-125 core. The introduction of the NH 2 -MIL-125 core endowed the hybrid materials with high Brunauer–Emmett–Teller (BET) surface area ( S BET ) and abundant unsaturated metal sites. And the coating of COF-OH shell endowed the hybrid materials outstanding physicochemical stability and visible-light response, and suitable band gaps. Moreover, the thickness of the COF-OH shell was carefully adjusted according to the feeding amount of NH 2 -MIL-125. Impressively, the electron transfer pathway in the formed heterostructure was clarified and it was proven that a type-II heterojunction was generated between the MOFs and the COFs. The formed stable C N covalent bonds in the interfacial layer was beneficial to the photogenerated electron transfer and the electron-hole pairs separation, which greatly enhanced the CO 2 photocatalytic reduction. The product NH 2 -MIL-125@COF-3 exhibited the highest CO yield of 22.93 μmol·g −1 ·h −1 , about 2 times higher than NH 2 -MIL-125 (11.82 μmol·g −1 ·h −1 ) and 3 times greater than COF-OH (7.26 μmol·g −1 ·h −1 ). This work can provide helpful ideas for the careful design of the novel MOFs@COFs hybrid materials as well as useful exploration for the CO 2 photocatalytic reduction.
研究领域:
材料科学
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环境科学
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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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DOI
高影响因子
APPLIED SURFACE SCIENCE
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2023
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IF 6.7
Qihui Sun,Jinyao Li,Hongyan Zhang,Xiong He,Baoshan Wu,Junwei Wang,Nasir Mahmood,Xian Jian
Traditional single-component microwave absorbers face the difficulties including the narrow absorption bandwidth and low absorption strength. Herein, we develop a novel dual-magnetic composite decorating with covalent-organic framework (COF of 1,3,5-triformylphloroglucinol and p-phenylenediamine: TpPa) and carbon hybrid to enhance microwave absorption performance. Namely, a dual-magnetic FeSiAl@(CoFe 2 O 4 /C)@TpPa core–shell structure with rich interfacial polarizations was prepared by the three main steps: firstly, the plate-like FeSiAl was decorated with the MOFs of ZIF-67. And then it was converted to FeSiAl@(CoFe 2 O 4 /C) after an annealing process under Ar. Lastly, the in-situ growth of COF (TpPa) was designed for enhanced microwave penetration into the interior of absorbers. The as-design dual-magnetic FeSiAl/CoFe 2 O 4 effectively favors to magnetic domain resonance resulting in the dual-magnetic coupling effects. Meanwhile, the multi-level structure formed by ultra-fine carbon in FeSiAl@(CoFe 2 O 4 /C)@TpPa enables magnetic-dielectric synergies and enriches the attenuation path as well. Furthermore, the accumulation of transferred charge at multiple interfaces provides a stronger relaxation polarization loss. The above positive factors collectively promote the high-performance microwave absorption with the reflection loss (RL) value up to −51.3 dB and the effective absorption bandwidth (EAB) covers 3.2–17.7 GHz by adjusting the thickness of absorbers. Therefore, this dual-magnetic/dielectric coupling approach provides an innovative strategy for fabricating advanced microwave absorbers.
研究领域:
材料科学
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电磁学
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产品关联
DOI
高影响因子
ANALYTICA CHIMICA ACTA
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2023
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IF 6.2
Tao Zhang,Yaming Sun,Xiaxing Feng,Jingna Li,Wenjie Zhao,Guoqiang Xiang,Lijun He,Shusheng Zhang
Background The development of efficent chromatographic stationary phases (SP) with mixed-mode or multiple interactions in high-performance liquid chromatography (HPLC) for the separation of complex samples is a challenging task. Metal organic frameworks (MOFs)-based SP can provide desired multiple interactions and enable the separation of a diverse range of solutes, but have limitations of low column efficiency and poor stability. Results Herein, the hybrid MOFs@Covalent organic frameworks (COFs) materials were used as SP in HPLC due to their synergistic structural features. The SiO 2 @NH 2 -UiO-66@CTF SP was synthesized by integration of NH 2 -UiO-66 and covalent triazine framework (CTF) onto silica surface. Due to the unique structure of SiO 2 @NH 2 -UiO-66@CTF with hierarchical-pores, this column showed higher column efficiency (up to 49,369 plates m −1 for alkylbenzenes) than the reported columns packed with MOFs-based SP. Owing to the Zr 4+ -N coordination bonding between CTF and NH 2 -UiO-66, the structural stability of SiO 2 @NH 2 -UiO-66@CTF can be improved. Furthermore, this new column exhibited remarkable column stability with relative standard deviation of retention time of <0.40% after 400 injections. With the combined advantages of multifunctional properties, high column efficiency, and good stability, SiO 2 @NH 2 -UiO-66@CTF SP showed excellent selectivity for the separation of a variety of hydrophobic, aromatic, heteroatomic, and hydrophilic analytes. Significance and novelty This work not only offers a promising SP with multiple retention mechanisms for HPLC, but also provides an efficient strategy for development of high column efficiency MOFs-based SP with good stability. Moreover, the MOFs@COFs hybrid materials were expanded in application area through this study, and the research results can also afford the foundation for further explore its structural characteristics.
研究领域:
分析化学
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材料科学
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产品关联
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2026
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IF 3.9
Shucheng Liu,Bo Wang,Ruiheng Lu,Hongxiang Ou,Xuan Zhang
Naringin (NRG) is a bioactive substance with important pharmaceutical and industrial value. However, the major challenges in the separation of NRG arise from the complexity and low concentration of crude extracts. In this work, by integrating the advantages of magnetic separation, MOFs@COFs composite materials, and surface molecular imprinting strategy, a new kind of magnetic MOF@COF-based boronate-affinity molecular imprinted adsorbent (NH2-MIL-68-Fe3O4@COFs@BA-MIPs) was constructed. Magnetic NH2-MIL-68 substrates were prepared by the solvothermal method, aldehyde-functionalized by surface modification with 2,4,6-triformylphloroglucinol (Tp). Then, a covalent organic framework shell was grown on the surface of substrates via the Schiff base reaction. Finally, a boronate-affinity imprinted polymer was prepared via surface-initiated atom transfer radical polymerization (SI-ATRP). The as-prepared adsorbent features rapid magnetic separation. In addition, the high-density boronate-imprinted recognition sites and porous structure endow the material with a fast adsorption rate (reaching equilibrium about 60 min), a high adsorption capacity (57.29 μmol g–1), and good retention performance (92.79%) after six adsorption–desorption cycles at 308 K under pH 8.0. Moreover, the extraction rate of crude NRG by NH2-MIL-68-Fe3O4@COFs@BA-MIPs reached 93.61%. This study provides a design strategy for constructing NRG adsorbents with rapid magnetic response and has important application value in the specific separation and purification of flavonoids.
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DOI
高影响因子
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