MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 5
·1-12
·
IF 5.3
Zhang Zejun,Shi Fan,Ai Yijing,Li Xiaoqing,Zhang Dan,Wang Lisi,Sun Wei
A core–shell ZIF-67@ZIF-8-derived Co nanoparticles embedded in N-doped carbon nanotube polyhedra (Co/C-NCNP) hybrid nanostructure was prepared by a pyrolysis method. The synthesized Co/C-NCNP was modified on the screen-printed carbon electrode and used for the portable wireless sensitive determination of breviscapine (BVC) by differential pulse voltammetry. The Co/C-NCNP had a large surface area and excellent catalytic activity with increasing Co sites to combine with BVC for selective determination, which led to the improvement of the sensitivity of the electrochemical sensor. Under optimized conditions, the constructed sensor had linear ranges from 0.15 to 20.0 µmol/L and 20.0 to 100.0 µmol/L with the limit of detection of 0.014 µmol/L (3S 0 /S). The sensor was successfully applied to BVC tablet sample analysis with satisfactory results. This work provided the potential applications of zeolitic imidazolate framework-derived nanomaterials in the fabrication of electrochemical sensors for the sensitive detection of drug samples. Graphical abstract
研究领域:
材料科学
·
分析化学
·
药物分析
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Jiahao Cui,Xiaolong Gao,Bo He,Yong Yao,Yifan Zhao,Tiecheng Wang,Xianqiang Yin
The bimetallic oxides heterojunction structure from new 3D-ZIF was prepared to degrade the chlortetracycline by PDS activation. The system achieved more than 95 % degradation of chlortetracycline within 40 min. Theoretical calculations and physicochemical characterization of the NiZnCo-N-C proved that the material had better electron transfer properties and multi-site reactivity, and the presence of Zn provided an effective intermediate medium for the reaction of Co and Ni, while the non-metallic N-C component also constituted good electron reaction sites. Meanwhile, the existence of abundant oxygen vacancies established the good foundation for the formation of oxygen radicals in the material, and the rapid electron transfer processes speeded up non-radical processes such as electron transfer and 1 O 2 .The combination of two degradation pathways reduced the impact of environmental factors, the PDS + NiZnCo-N-C system exhibited relatively stable or even better performance in the existence of inorganic anions. Furthermore, the structure of the NiZnCo-N-C had the smallest d-band center, which efficiently adsorbed PDS molecules and broke the O-O bond in PDS. DFT Conclusion and LC-MS of CTC suggested the various reaction processes in the system. Our study provided new solutions and insights for the organic pollutions in the aquatic environment.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
BIOMACROMOLECULES
·
2023
·
IF 6.2
Qizhen Zheng,Jinhan Sheng,Ji Liu,Xianghan Chen,Ming Wang
Biomineralization of metal–organic frameworks (MOFs) provides a powerful approach for intracellular protein delivery, enabling the study of biological function and therapeutic potential of proteins. However, the potency of this approach is largely challenged by the low efficiency of current strategies for interfacing proteins with MOFs for biomineralization and intracellular delivery. Here, we report a versatile and convenient biomineralization strategy for the rapid encapsulation and enhanced delivery of proteins using MOFs, accelerated by histidine-rich proteins. We demonstrate that the histidine-rich green fluorescent protein (H39GFP) can accelerate the biomineralization of MOFs by promoting the coordination between proteins and metal ions, leading to enhanced protein delivery efficiency up to 15-fold. Moreover, we show that the delivery of H39GFP-fused cytotoxic ribonuclease and bacterial-derived RAS protease can effectively inhibit tumor cell growth. The strategy of promoting the biomineralization of MOFs via histidine-rich proteins for enhanced intracellular delivery could be expanded to other biomacromolecules, advancing their therapeutic potential and the biomedical scope of MOFs.
研究领域:
生物医学工程
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材料科学
·
生物化学
·
癌症研究
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DOI
PubMed
高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Hang Luo,Shenghui Guo,Xiaolei Ye,Li Yang,Ming Hou,Yunchuan Li,Zhiguang Hua
Designing the composition and structure of bi-metal hybrids is an available way to regulating the electromagnetic properties. Metal-organic framework (MOFs) materials have attracted profuse attention due to their low density and adjustable structure. Among all MOFs, zeolitic imidazolate framework (ZIFs) is an excellent precursor with diverse morphologies and various structures. This provides great structural designability. In this work, a Zn/Co bi-metal hybrid based on ZIF-8 and ZIF-67 templates was constructed via a novel approach. Solvent environment changing led to changes in morphology and structure. Thus the derivatives exhibited interesting electromagnetic wave (EMW) absorbing properties. In methanol-water mixing ambient solvents of different volume ratio, the Zn@Co-ZIFs present completely different morphologies and topological structures. The corresponding pyrolysis products ZnO/NC@Co/NCs (ZCNCs) inherited the morphologies of precursors and displayed great difference in EMW absorbing properties as a result of variant defects. The ZCNC originated from mixture where methanol volume ratio counted 75% exhibited the best absorption performance: the minimum reflection loss (RL min ) was -48.29 dB, and the effective absorption bandwidth (EAB) was 4.51 GHz (from 10.90 GHz ∼ 15.41 GHz). Besides, ZCNC originated from mixture where methanol occupied 25% of total volume displayed dual-band absorption at 3.6 mm. This work provides a novel perspective for the design of efficient EMW absorbing materials.
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高影响因子
RSC Advances
·
2022
·Vol. 12
·期 16
·9543-9549
·
IF 4.036
Tanlun Wang,Chenxiang Sun,Yong Yan,Fan Li
Metal–N–C-based catalysts prepared by pyrolysis are frequently used in the oxygen reduction reaction (ORR). Zeolitic imidazolate frameworks (ZIFs), a type of metal organic framework (MOF), are selected as precursors due to their special structure and proper pore sizes. A series of Fe–N–C catalysts with different concentrations of 2-methylimidazole were prepared with a simple solvothermal-pyrolysis method, and the transformation productivity, morphology and ORR activity were investigated. It was found that the Fe–N–C catalyst with a 2-methylimidazole concentration of 0.53 mol L−1 had the best performance. In 0.1 M KOH solution, the half-wave potential was 0.852 V (vs. RHE), with the highest electrochemically active surface area (ECSA) of 94.1 cm2, and the ORR reaction was dominated by a 4-electron process. The current only decreased by 10.5% after 50 000 s of chronoamperometry (CA), while the half-wave potential only decreased 20 mV in 3 M methanol. Additionally, this catalyst cannot be poisoned by Cl− and SO32− ions in the ORR process. Finally, some typical ions including SCN−, Fe(CN)63− and Fe(CN)64− were used to inhibit the active sites, and it was determined that Fe(II) is the real active species. The series of synthesis and testing experiments has significance in guiding optimization of the synthesis conditions and analysis of the mechanism of active sites in Fe–N–C materials.
研究领域:
材料科学
·
电化学
·
催化
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产品关联
DOI
PubMed
高影响因子
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