POLYHEDRON
·
2025
·
IF 2.6
Yuan-Zhen Wang,Liu Yang,Jia-Jia Kou,Yu-Qing Zhan,Yi-Lin Niu,Yu-Long Liu
Flumioxazin, a nitrophenyl herbicide widely used in agriculture, poses potential health risks due to its residue in agricultural products. This study elucidates the fabrication of a novel electrochemical sensor, MnO@C , specifically designed for the efficient detection of flumioxazin. The sensor MnO@C was created by annealing Mn-BTC , synthesized via a straightforward solvothermal method. The electrochemical behavior of MnO@C for detecting flumioxazin was assessed through DPV. The findings revealed that MnO@C demonstrated a wide detection range, achieving an exceptionally low LOD at 597 fmol/L for flumioxazin. Moreover, MnO@C exhibited exceptional duplicability, reliability, and anti-interference ability. The sensor MnO@C was also effectively utilized for the quantitative detection of flumioxazin in diverse samples. The results highlight the substantially practical utility of MnO@C in food and environment detection, which provides broad-spectrum environmental resistance and fast, efficient detection for flumioxazin residue. Additionally, a thorough analysis of the mechanism of MnO@C for monitoring flumioxazin was undertaken.
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高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2024
·
IF 4.4
Jingchuan Guo,Yan Gao,Xuankai Cao,Xing Rong,Shidan Chi,Guolan Fan,Lei Zhang,Guohong Tian,Xudong Zhao
Hydrogen energy has attracted widespread attention as a high-energy–density, sustainable and clean energy source. Hydrogen production by electrolysis of water is a simple and efficient method of hydrogen production. However, most of the currently widely used commercial catalysts are expensive precious metals and their oxides. Therefore, it is necessary to develop low-cost, efficient and stable catalysts to promote the development of the hydrogen energy industry. Metal organic framework (MOF), as a new type of porous, high surface area material, has great potential in catalysis. Bimetallic MOF materials can further improve the catalytic activity of MOF materials as electrocatalysts by adjusting metal sites. In this paper, different proportions of Fe-Co bimetallic MOF materials were synthesized by hydrothermal method, and the Fe-Co bimetallic carbon materials prepared by carbonization at high temperature were used as OER electrocatalyst, and the microstructure and electrochemical performance of the materials were analyzed and evaluated through microscopic mechanism characterization and electrochemical characterization. The test results show that Fe-Co bimetallic carbon materials have excellent electrocatalytic performance, Fe 2 Co/C and RuO 2 have the smallest high-frequency semicircles, and have the smallest internal charge transfer resistance. This indicates that Fe 2 Co/C has similar conductivity to RuO 2 . When the current density is 10 mA·cm −2 , Fe 2 Co/C has an overpotential of 335 mV, and when the current density is 50 mA·cm −2 , Fe 2 Co/C has an overpotential of 382 mV, and the oxygen evolution performance of Fe 2 Co/C is better than that of commercial precious metal catalyst RuO 2 at high current density. At the same time, its Tafel slope is only 58.8 mV·dec −1 , which is lower than that of RuO 2 catalyst, and it has a faster charge transfer rate. After CV cycles and 12 h of electrolysis by continuous chronoamperometry electrolysis, it exhibited excellent electrocatalytic stability.
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高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2025
·
IF 5.2
Xiupei Yang,Hanyu Yang,Die Deng,Yujie Kang,Yuxiu Fan,Ya Wang
Copper (Cu) nanoparticles have been widely used as catalysts for colorimetric assays. The challenge in developing Cu nanoparticles is to design nanomaterials with high catalytic activity and stability. Herein, a series of NH 2 -MIL-125(Ti)@Cu (Ti-MOF@Cu) composites with enzyme activity were obtained by in situ growth of different proportions of copper on titanium-based metal organic frameworks (Ti-MOFs), among which [email protected] showed the highest enzyme activity. Electron transfer at the interface of Ti-MOF and Cu promoted the decomposition of hydrogen peroxide (H 2 O 2 ) to generate active species under near-neutral conditions, thereby oxidizing colorless TMB to blue oxidized TMB (ox-TMB). On this basis, a sulfide ion (S 2− ) detection method based on a [email protected] colorimetric sensor was constructed, in which the limit of detection (LOD) was 0.16 μM in the linear range of 0.5–30 μM. Furthermore, [email protected] was successfully used for detecting S 2− in water samples. The successful synthesis of Ti-MOF@Cu provides new insights for further study of the enzyme-like activity of copper-based materials, and the constructed facile and sensitive sensor system has broad application prospects.
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高影响因子
FUEL
·
2025
·
IF 7.5
Zihao Hu,Xiaoying Zhou,Tiantian Zhang,Zuliang Wu,Jing Li,Wei Wang,Erhao Gao,Jiali Zhu,Shuiliang Yao
Catalytic combustion has been considered the effective way to oxidize carbon monoxide (CO). It is both crucial and challenging to develop highly-active monolithic catalysts at lower temperatures for industrial applications. This study synthesized a monolithic Co 3 O 4 /Mn 3 O 4 -NF catalyst by the generation of in-situ metal–organic framework (MOF-74)-derived Co 3 O 4 /Mn 3 O 4 on nickel foam (NF). The resulting Co 3 O 4 /Mn 3 O 4 -NF catalyst demonstrated superior low-temperature CO oxidation performance, and the T 90 temperature was 20 °C. The enhanced activity is associated with the increased oxygen vacancy concentration, abundant Co 3+ , Mn 2+ + Mn 3+ , and surface-adsorbed oxygen species (O ads ), as well as low-temperature reducibility. In addition, operando DRIFTS analysis revealed that the surface of this as-prepared catalyst possessed abundant terminal-type oxygen (M O), facilitating CO adsorption and catalytic oxidation. This pioneering study introduces a paradigm-shifting insight: the effectiveness of non-noble metal oxide catalysts can now compete with, and in some cases, outperform their noble metal counterparts. This breakthrough is set to transform the industry, presenting a compelling alternative to conventional noble metal catalysts and propelling the evolution of state-of-the-art environmental conservation technologies.
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高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Yuanyuan Jiang,Qianying Lu,Xueting Zhao,Kai Zhao,Anqi Liu,Jiefeng Pan
The solar-driven interfacial evaporation (SDIE) technology serves as a clean and facile approach combining seawater desalination to address water shortage and energy crisis. Recently, porous organic framework materials have aroused great attention, and the development of MOF-based composites with significant performance in photothermal conversion and water activation has become one of the important focuses in this field. In this work, an MOF-based composite photothermal membrane (PON@MOF) was prepared via the in situ growth of metal–organic framework (MOF) nanoneedle arrays induced by a pyridine-based organic polymer nanowire network (PON). The PON@MOF membrane possessed an MOF array layer, a PON-induced layer, and a porous support layer. The PON is rich in coordinated nitrogen atoms for anchoring the metal-ion source, and the main role of the PON layer is to provide favorable nucleation sites and orient in situ growth of well-aligned MOF nanoneedle arrays. With the highly conjugated framework of PON@MOF and the light trapping of the nanoarrays strengthening the photothermal conversion as well as the hydrophilic chemical structure facilitating the decrease of the water evaporation enthalpy, the PON@MOF membrane realizes highly efficient thermal vapor conversion. Under solar irradiation (1.0 kW m–2), PON@MOF demonstrated an evaporation rate of 2.14 kg m–2 h–1 and a solar-to-vapor conversion efficiency of 98.5%. Meanwhile, the PON@MOF membrane has excellent salt resistance and stability, highlighting its potential application in desalination. Overall, this work provides a special idea for the structural design of photothermal composites for solar desalination and freshwater production.
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PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Xinyi Wang,Jing Wang,Jian Yang,Houcheng Ding,Yongping Dong
Sensitive and selective determination of neurotransmitter dopamine (DA) holds great significance in clinical disease diagnosis. Constructing highly active electrocatalysts at low costs is a favorable strategy for sensitive electrochemical detection of DA. In this work, taking a template-aided method, single-atom iron supported on hollow N-doped carbon matrix (Fe SA/HNC) was successfully synthesized. After the morphology and component of the prepared catalysts were characterized in details, it was used to construct electrochemical sensor. Given the excellent catalytic activity of Fe SA and the porous spherical structure of HNC, under the optimal conditions, the Fe SA/HNC sensor exhibited superior sensing performance to DA in a wide concentration range from 1.0 to 1000 µM with a low detection limit of 0.32 µM, along with good stability, reproducibility, and repeatability. In addition, the Fe SA/HNC sensor was also adopted to the simultaneous detection of three common small biomolecules including DA, uric acid (UA) and ascorbic acid (AA). Lastly, the applicability of the sensor was also well-demonstrated by detecting DA in real samples of human serum, showing satisfactory recoveries.
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DESALINATION
·
2025
·
IF 9.8
Xiaosong Zhang,Jiajia An,Daquan Zhang
Fluoride contamination has become a global public health problem due to its adverse health effects. The search for efficient and environmentally friendly fluoride removal technology is an urgent issue. Capacitive deionization (CDI) technology has attracted much attention because of its high efficiency, easy operation and environmental friendliness. Electrode materials are crucial for CDI systems. Herein, Mg-MOF-derived dendritic carbon materials (MMCNF) are successfully grown in situ on lignin nanofibers via solvothermal synthesis. Due to the high specific surface area of Mg-MOF and the structural stability of lignin nanofibers, it has a high specific capacitance of 158 F·g −1 at a current density of 1 A·g −1 . And the capacitance retention of 93.13 % is obtained after 5000 charge/discharge cycles. The CDI unit equipped with MMCNF electrodes effectively reduced the fluoride ion concentration to 1.21 mg·L −1 in a 10 mg·L −1 simulated fluoridated wastewater, exhibiting a maximum adsorption capacity of 20.64 mg·g −1 . It is lower than the drinking water standard of 1.5 mg·L −1 set by the World Health Organization. This work offers new electrode materials and technological options for the removal of fluoride ions from wastewater in the future.
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高影响因子
ACS Applied Polymer Materials
·
2024
·
IF 4.4
Yadi Zhang,Haikuan Yuan,Xinyi Chen,Zhenlin Jiang,Jie Lu,Fan Xin
MXene has a multilayer structure, which can be peeled and layered into single or multilayer nanosheets, and it possesses multiple functional groups that can be easily modified. MOF-303, a kind of metal–organic framework material, was synthesized by the solvent hydrothermal method using aluminum ion as the center metal and 3,5-pyrazole dicarboxylic acid as the organic ligand. In this paper, MOF-303 was grown in situ on Ti3C2Tx MXene to synthesize the MXene@MOF-303 composite, which combined the advantages of both MXene and MOF-303. Using the MXene@MOF-303 composite as blending fillers and a polyacrylonitrile (PAN) ultrafiltration (UF) membrane as the substrate, an MXene@MOF-303/poly(vinyl alcohol) (PVA)/PAN composite membrane was fabricated. The composites and membranes were characterized by FTIR, XRD, SEM, and the pervaporation desalination of the composite membrane was also tested. The experimental results showed that the incorporation of MXene@MOF-303 composites improved the separation performance of the PVA membrane. The MXene@MOF-303/PVA/PAN composite membrane, loaded with 0.5 wt % of MXene@MOF-303, achieved a high flux of 15.87 kg·m–2·h–1 and a rejection of 99.84% when desalinating 3.5 wt % NaCl solution at 35 °C by pervaporation.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2024
·Vol. 48
·期 4
·1792-1799
·
IF 2.7
Junfeng Wang,Sihua Pan,Wang Sun,Yang Wang
The ingenious microenvironment regulation of a metal–organic framework (MOF) is vital for the advancement of electrochemical sensing applications. Herein, the PcFe@ZIF-8 (PcFe, iron phthalocyanine and ZIF-8, zeolitic imidazolate framework-8) hybrid material was constructed by an in situ impregnation strategy. Then, the hollow MOF nanocomposite, Au/PcFe@HZIF-8 (Au, gold and HZIF-8, hollow ZIF-8), was successfully fabricated via the Kirkendall effect without additional templates/etchants. Next, the Au/PcFe@HZIF-8 electroanalysis platform was assembled for sensitive detection of chlorogenic acid (CGA). Abundant active sites provided by the ultra-small sized Au NPs, redox characteristics of PcFe and quicker mass transfer exhibited by hollow MOF cavities were the key factors responsible for ingenious microenvironment regulation. From electrochemical performance evaluation, it was found that the response interval was from 0.03 to 500 μmol L−1 and the detection limit was 0.01 μmol L−1 (S/N = 3). In addition, Au/PcFe@HZIF-8/GCE displayed superior selectivity and stability, which allowed the sensor to achieve satisfactory results in actual sample detection as well. Furthermore, several statistical analyses (F-test and t-test) were applied to ensure the precision of practical sample detection. This novel strategy for the construction of hollow MOFs and ingenious microenvironment regulation will unveil a different path for the electrochemical applications of porous hybrid nanomaterials.
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ACS Applied Nano Materials
·
2024
·
IF 5.3
Yunpeng Zhou,Jing Wang,Jiawei Yang,Long-Hui Duan,Hai-Bo Liu,Junfei Wu,Lina Gao
SBA-15@MOF-525 composites were constructed by in situ self-assembly of a metal–organic framework (MOF-525) with mesoporous SBA-15 silica. MOF-525 crystals were confined inside the mesopores as well as grown on the outside surface of SBA-15, under the impact of the structure-directing role of SBA-15, and the composites exhibited both microporous and mesoporous characteristics. In general, the adsorption of tetracycline (TC) on MOF-525 was affected by pH. The adsorption capacity of MOF-525 decreased rapidly, especially in an alkaline environment, due to the collapse of the MOF-525 skeleton. By contrast, incorporating MOF-525 into SBA-15 improved the stability of MOF-525. The adsorption of TC on SBA-15@MOF-525 was almost unaffected by pH. High and stable adsorption capacity over a wide pH range was maintained under acidic, neutral, and alkaline environments. The composites were used effectively for TC adsorption. The maximum adsorption capacity of TC on SBA-15@MOF-525 was 690 mg/g, which is higher than that of most of the reported adsorbents. The great potential of SBA-15@MOF-525 in practical applications was demonstrated by investigating the adsorption of TC in lake water samples.
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Carbon Capture Science & Technology
·
2024
·
IF 10.4
Zizhao Chen,Shuai Yan,Guang Yang,Qiang Hu,Yingquan Chen,Hanping Chen,Yonggang Yao,Haiping Yang
To avoid sintering and carbon deposition of conventionally loaded catalysts, a spatial confinement strategy was employed to design a high-performance catalyst for the dry reforming of methane (DRM) reaction. With tri-metallic Ni-Co-Mg metal-organic framework (MOF-74) as a precursor, a novel nanostructured NiCoMg@C catalyst was synthesized, where the active metals Ni and Co were confined within the carbon framework derived from MOF pyrolysis. Characterization results indicate that the catalyst synthesized with MOF as template has a high specific surface area, well-dispersed metals, and strong metal-support interactions. The introduction of a high content of Mg promoted the dispersion of active metal Ni and Co and increased the number and strength of surface basic sites. Among the catalysts, NiCoMg 20 @C exhibited optimal catalytic activity, with initial CH 4 and CO 2 conversion rates reaching 75.13 % and 85.29 %, respectively. More importantly, the catalyst showed high stability during 100 h DRM reaction at 700 °C without significant carbon deposition. This research provides a new perspective for the development of DRM catalysts.
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DYES AND PIGMENTS
·
2024
·
IF 4.1
Ludan Shang,Shan Wu,Xinyu Liu,Yuhan Duan,Yanhui Li,Qian Duan
Molybdenum disulfide (MoS 2 ) is a nonlinear optical material with graphene-like structure. In order to further improve the nonlinear optical performance of MoS 2 and expand the application fields of MoS 2 , we report a simple in-situ self-growth method to functionalize MoS 2 nanosheets with metal-organic framework (MOF) for the first time to pursuit excellent reverse saturable absorption performance and optical limiting performance. Firstly, defective MoS 2 nanosheets was obtained by chemical etching with H 2 O 2 and cysteamine was inserted into the sulfur vacancies under ultrasound to obtain MoS 2 –NH 2 . Then 5,10,15,20-Tetra (4-carbomethoxyphenyl) porphyrin (TCPP) as MOF active growth sites were grafted on MoS 2 –NH 2 by amido linkage to obtain MoS 2 -TCPP in mild conditions. Finally, flower-like porphyrin-based CuMOF was grown on MoS 2 -TCPP by solvothermal method to obtain MoS 2 -CuMOF with stable structure. The third order nonlinear optical performance of MoS 2 -CuMOF were studied by Z-scan technique. It was found that the third order nonlinear absorption coefficient of MoS 2 -CuMOF was significantly improved compared with MoS 2 . Under the same energy of laser irradiation, the third order nonlinear absorption coefficient of MoS 2 -CuMOF nanocomposite in solution was 6 × 10 −10 m/W about 2.3 times of the pristine MoS 2 (2.6 × 10 −10 m/W). After blending the above materials with polymethyl methacrylate (PMMA) to prepare a solid device, the third order nonlinear absorption coefficient of MoS 2 -CuMOF/PMMA was 18 × 10 −10 m/W about 3.6 times of the MoS 2 /PMMA (5 × 10 −10 m/W). And MoS 2 -CuMOF/PMMA had better optical limiting ability than MoS 2 /PMMA. The significant improvement in the performance of the composites can be attributed to the energy transfer between MoS 2 and CuMOF, and porphyrin aggregation was inhibited by PMMA after the preparation of devices. Energy transfer can be proved by fluorescence spectroscopy. This work not only provided an example for the covalent functionalization of MoS 2 , but also offered a new method for designing materials with excellent nonlinear optical performance.
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