Small
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2025
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IF 12.1
Yujie Guo,Lingfei Li,Maofeng Zhang,Shihao Xu,Changlong Jiang
Polymetallic MOFs heterostructural composites enhance their usage in a range of sensing domains by combining two or more different MOFs to produce a new MOF-on-MOF integrated module. As its widespread utilization of flavomycin (Fla), there are currently complications with agricultural residue and the environment, consequently, a highly sensitive, portable technology for identification will be required to handle environmental monitoring in real-time. In this work, the structural characterization and characteristics of the two-layer MOF-on-MOF heterostructure are investigated using the epitaxial growth method. Electrons migrate from the Fe metal center to the organic ligand primarily as a result of hydrogen bonding between Fla and the surface of Fe-MOF and energy transfer amongst the Fe atoms and NH 2 -MIL-101 (Eu). The synergistic impact of NH 2 -MIL-101(Eu) and Fe-MOF improves the sensitivity and accuracy of detection, which has a 4.8 n m detection limit, enabling the high sensitivity detection of Fla. Likewise, we put together a handheld sensing platform incorporating aerogel and sensing materials that can meet the expectations of real-time monitoring and multiple actual sample detection, and fluorescent MOFs materials offer an innovative viewpoint on the application of creating flexible sensors, enabling a new method of visualization for food safety and environmental early alerting.
研究领域:
材料科学
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环境科学
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食品安全
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ChemSusChem
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2022
·Vol. 16
·期 1
·e202201947
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IF 9.14
Lujiao Mao,Dandan Chen,Yuanyuan Guo,Cheng Han,Xuemei Zhou,Zhi Yang,Shaoming Huang,Jinjie Qian
Graphical Oxygen evolution : Unique anisotropic MOF-on-MOF materials can be conveniently obtained by using solvents with different polarities. After carbonization, they exhibit a satisfactory oxygen evolution reaction performance that can be attributed to the synergistic effect between Fe and Ni to accelerate the proton-coupled electron transfer kinetics. The exploration of non-noble metal electrocatalysts with high catalytic activity and stability for oxygen evolution reaction (OER) has become particularly urgent. Here, FeNi-based Prussian blue analogues (PBAs) were obtained by adding different solvents, where PBA particles preferentially grew on the surface plane/edge of coordination polymer precursor (Ni-ABDC) with various polarities. This resulted in the formation of FeNi-PBA-plane/edge morphologies, respectively. Notably, on account of more exposed PBAs, FeNi nanoparticles were uniformly supported on the porous N-doped carbon nanomaterials. Among them, the calcined FeNi-NC-800 underwent an interesting pre-activation process and exhibited a low overpotential of 281 mV at 10 mA cm −2 and a small Tafel slope of 82 mV dec −1 in 1.0 m KOH. This bimetallic sample showed superior OER activity and stability in comparison with control materials, which could be attributed to its abundant FeNi nanoparticles, high nitrogen content, large specific surface area, and synergistic effects between Fe and Ni atoms. In addition, relevant theoretical calculation on the optimal catalyst, FeNi-NC-800, further demonstrated its efficient OER performance with effective Fe-doping in the Ni-based oxyhydroxides.
研究领域:
材料科学
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电化学
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产品关联
DOI
PubMed
高影响因子
Applied Materials Today
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2024
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IF 7.2
Chao Su,Zexuan Wu,Jing Zhang,Kaiyang Li,Yanqiang Kong,Naiqiang Zhang,Yongping Yang
Efficient freshwater production techniques are urgently required to address the global water-scarcity problem. The solar-driven atmospheric water harvesting (AWH) technology, which can capture water vapour from ambient air and release it under sunlight, is a sustainable and feasible strategy for obtaining fresh water. The key to achieving high water harvesting lays in the dynamic adsorption properties of the material and the heat and mass transfer characteristics of the device structure. Therefore, this paper reports a core-shell structured material, UiO-66@MIL-101(Cr) (U@M), where the outer layer exhibits excellent water-adsorption characteristics under arid conditions, and the inner layer exhibits high water-adsorption characteristics under high humidity conditions. These inner and outer layer materials are assembled into a core-shell structure while considering the water-harvesting features of both sides, achieving synergistic enhancement of the AWH performance at low relative humidity (RH). Experimental results demonstrate that at 25°C and 30 % RH, the novel core-shell structured material achieves a high water-harvesting capacity of 0.408 g g −1 and excellent stability in 50 operating cycle tests. At the system level, we have developed a solar-driven AWH device based on the synthesised core-shell material. Daytime and night-time experimental tests were conducted in outdoor environments, resulting in a water production rate exceeding 1.336 kg m − ² day − ¹, with the collected water meeting the standards for laboratory-grade pure water. The research findings can be applied to alleviate water issues in arid regions, such as residential water supply, industrial electrolysis for hydrogen production and other fields, showing broad application prospects.
研究领域:
材料科学
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环境科学
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水资源工程
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产品关联
DOI
高影响因子
TALANTA
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2024
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IF 5.6
Yingao Yang,Zixuan Zhou,Tao Wang,Daoming Tian,Shuyue Ren,Zhixian Gao
We explored a novel preparation method for MOF-on-MOF heterostructured material (Zn-BTEC@ZIF-8). This prepared heterostructured material acts as a container, capable of adsorbing tetracycline hydrochloride molecules into its backbone through hydrogen bonding and π-π interactions. This phenomenon triggers an aggregation induced emission (AIE) effect, leading to the formation of luminescent bodies. The coordination between histamine and MOF was found to collapse the originally stabilized MOF-on-MOF structure. This collapse causes the splitting of the initially stabilized MOF-on-MOF structure from the aggregated state into fragments, resulting in the quenching of fluorescence in the fluorophore. Remarkably, the fluorescence quenching efficiency of this composite surpasses that of single-layer metal−organic framework (MOF) zeolitic imidazolate framework-8 (ZIF-8) or zinc-based MOF of pyromellitic acid (Zn-BTEC), enabling more sensitive detection of histamine. In this investigation, we constructed a label-free fluorescent sensor specifically designed for the detection of histamine, capitalizing on the AIE effect inherent in MOF-on-MOF architecture and the presence of tetracycline hydrochloride (Tet). The sensor demonstrates a rapid, straightforward, and stable response, allowing for histamine detection within 20 min. Notably, the sensor covers a detection range of 2–400 mg L −1 , achieving a low detection limit of 1.458 mg L −1 The practical application of this sensor for quantitative detection of histamine in river water and various fish species exhibited robust performance, ensuring reliability and accuracy in real samples. Its potential application in food safety and environmental monitoring is evident, making it a valuable tool for addressing histamine-related challenges in these domains.
研究领域:
材料科学
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分析化学
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环境科学
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食品科学
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产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
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2024
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IF 8.5
Zhehang Tian,Xieyang Zhang,Yuting Zhang,Zimeng Wu,Guanqun Luan,Luqian Bao,Yixin Ji,Mengyao Cui,Chunhua Li
The misuse of tetracyclines in livestock production poses significant health risks. Thus, establishing convenient detection methods to replace complex laboratory tests for food safety is crucial. In this study, a heterostructure Zn-BTC/IRMOF-3 (denoted as ZBI) asynchronous response fluorescence sensor was developed for the qualitative and quantitative detection of tetracyclines in foods. The ZBI solution exhibited blue fluorescence under UV excitation; upon the introduction of tetracyclines, ZBI selectively recognized the tetracycline molecules through electron transfer, π-π stacking, and chelation, resulting in blue fluorescence quenching and green fluorescence enhancement. The ZBI sensor for tetracycline detection achieved recovery rates ranging from 93.91 to 111.91% in food samples, with a detection limit of as low as 0.086 μmol/L. Lastly, a portable sensing device using support vector classifier was constructed for detecting tetracyclines in real-life scenarios. Our findings introduce a new approach for fabricating fluorescence sensors and offer a novel method for detecting tetracyclines.
研究领域:
材料科学
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分析化学
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食品安全
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机器学习
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）