JOURNAL OF MOLECULAR LIQUIDS
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2022
·
IF 6.633
Yi Liu,Guangyao Qiu,Yongfeng Liu,Yuzhong Niu,Rongjun Qu,Chunnuan Ji,Ying Wang,Ying Zhang,Changmei Sun
Two kinds of metal organic framework (MOF) materials with Fe family elements as bimetallic center were synthesized via two different methods of one pot flux and MOF-on-MOF, respectively. The thermal stability and pore structure of the prepared MOF materials were different from each other. The prepared MOF materials were utilized to remove Congo red from aqueous solution to test their potential use in the treatment of wastewater containing organic dyes. Parameters affecting adsorption properties like contact time, initial concentration, ionic strength and pH of Congo red solution were systematically investigated. The adsorption capacity of CoFe-MOF material can reach as high as 1935.68 mg/g for Congo red and those of MOF materials with monometallic Fe and Co were 775.19 and 628.93 mg/g, respectively, indicating CoFe-MOF exhibited more defects leading to higher adsorption efficiency. It was surprising and interesting to find that the adsorption behaviors of the CoFe-MOF materials prepared by two different methods were different from each other. The prepared MOF materials can be used as potential candidates to treat organic dyes pollution especially anionic dyes from wastewater. This study provided guiding significance in the preparation of mixed MOF materials with more defects to be used in the remediation of effluents including organic dyes.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2024
·
IF 2.7
Jiahui Li,Yufen Wang,Qinyuan Yu,Xuedong Wei
A kind of MoS2@CoFe-MOF electrocatalyst was prepared on carbon cloth by a one-pot hydrothermal method. Excellent electrocatalytic activity of MoS2@CoFe-MOF is demonstrated, and the catalyst has overpotentials of 220 mV and 405 mV at 10 mA cm−2 and 50 mA cm−2, respectively. It is found that the MoS2@CoFe-MOF electrode exhibits excellent stability at the end of operation for 48 000 s, and it has the highest electrochemically active specific surface area and the lowest charge transfer resistance. This work proposes a promising approach in energy chemistry for hydrogen production by electrolysis of water using electrocatalysts composed of non precious transition metal sulfides and bimetallic MOFs.
研究领域:
材料科学
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电化学
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能源化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
·
IF 16.744
Tao-Long Wu,Xiu-Niang Tan,Tian-Tian Nong,Yu-Jie Pan,Peng-Fei Qiu,Jia-Qi He,Yan Zhou,Xue-Cai Tan,Zai-Yin Huang,Lei Han
Owing to the high specific surface area, rich active sites, well-controlled morphology and structural stability with tunable compositional components, the rational combination of hybrid nanostructured materials from metal-organic frameworks templates has become highly attractive and still of great challenge for supercapacitors. In this work, three bimetallic metal–organic frameworks Co 1-x Fe x -MOF-74/NF ( x = 0.25, 0.5 and 0.75 ) nanoarrays with different proportional Co/Fe ratios on nickel foam have been successfully designed and fabricated via in-situ interfacial growth method, which were further controllable converted to α-Co(OH) 2 /CoFe 2 O 4 nanoarrays with different proportional Co/Fe ratios CF-x/NF ( x = 0.25, 0.5 and 0.75 ) without structure collapse through alkaline etching process. Among them, the transformation of the bamboo-shoot-like CF-0.75/NF electrode displays excellent electrochemical properties with high area capacitance (3941.14 mF/cm 2 at 2 mA/cm 2 ), good rate capability, low resistances and remarkable cycling stability. The CF-0.75//AC ASC device delivers a high energy density of 0.16 mWh/cm 2 at a power density of 0.756.1 mW/cm 2 . And this CF-0.75//AC ASC device exhibits a good cycling stability and practical application in energy storage field. This strategy could be extend to form other unique bimetallic hybrids nanoarrays architectures with enhanced electrochemical activity for high-performance energy storage devices.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2026
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IF 6.7
Man Wang,Shichao Chen,Kang Wang,Song Song,Xitao Wang
A Ru-doped CoFe MOF-derived Co 3 O 4 -Fe 2 O 3 heterostructure was fabricated via mild pyrolysis. • The low-temperature strategy preserves the 2D MOF nanosheet scaffold. • Ru incorporation modulates Co/Fe electronic states and suppresses structural aggregation during mild pyrolysis. • Ru 0.024 CoFe MOF-250 requires only 227 mV at 20 mA cm −2 with a Tafel slope of 33.67 mV dec −1 . • Excellent durability is demonstrated by only 8.3 mV potential increase after 100 h at 20 mA cm −2 . Metal-organic frameworks (MOFs) are promising for the oxygen evolution reaction (OER), yet they suffer from framework collapse and active-site aggregation during high-temperature pyrolysis. Herein, a Ru-doped CoFe MOF is grown in situ on nickel foam (NF) and subsequently annealed at 250 °C, forming a Co 3 O 4 -Fe 2 O 3 @Ru 0.024 CoFe MOF heterostructure. The incorporation of Ru modulates the local electronic structure of the Co/Fe centers, while mild annealing at 250 °C generates Co 3 O 4 -Fe 2 O 3 nanophases within the partially preserved MOF nanosheet scaffold. This creates intimate heterointerfaces that facilitate rapid charge transfer. In 1.0 M KOH, the optimized electrode delivers a current density of 20 mA cm -2 at an overpotential of only 227 mV, exhibits a low Tafel slope of 33.67 mV dec −1 , and achieves an electrochemical surface area (ECSA) of 133.5 cm 2 . After 100 h of operation at 20 mA cm −2 , the potential increases by merely 8.3 mV. This work presents an effective strategy that combines Ru doping with mild pyrolysis to construct efficient and stable MOF-based OER electrocatalysts.
✓ 已验证
DOI
高影响因子
ACS Catalysis
·
2026
·Vol. 16
·期 16
·16350-16361
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IF 13.6
Sun Qiufan,Zhu Yuxiang,Zhang Yuanzheng,Ren Hanjie,Chen Yiyang,Zhong Xiang,Xu Sai,Cui Entian,Liang Yuhang,Yao Jianfeng
Bimetallic engineering in metal−organic frameworks (MOFs) offers a powerful strategy to enhance photocatalytic nitrogen fixation by optimizing electronic structure and facilitating directional charge transfer. This work reports a rational design of CoM-MOF-74 (M = Fe, Cd, Mg) catalysts synthesized via a solvothermal method. Among them, CoFe 0.25 -MOF-74 (Co:Fe = 4:1) microrods deliver the best performance, achieving an ammonia production rate of 120 μmol g cat −1 h −1 with an apparent quantum efficiency of 1.63% at 420 nm. The catalyst sustains high activity under outdoor sunlight and remains effective in multiple water environments. Mechanistic studies reveal that Fe incorporation alters the coordination environment while enabling synergistic Fe→Co charge transfer. This cooperative effect strengthens N 2 activation at the neighboring Co sites and concurrently suppresses the competing hydrogen evolution reaction. This work highlights metal-to-metal charge transfer in MOFs as a fundamental strategy for constructing efficient and durable photocatalysts for solar-driven ammonia synthesis.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2022
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IF 10.319
Runrun Cheng,Yan Wang,Xiaochuang Di,Zhao Lu,Ping Wang,Xinming Wu
At present, the problem of electromagnetic wave (EMW) pollution is critical, and the design of high-performance absorbers is of great significance. Based on the synergy between dielectric and magnetic losses, and between multicomponents in heterostructures, the development of light-weight absorbers with a strong absorption capability and multiple scattering is a promising strategy to achieve high-performance absorbers. In this work, CoFe-MOF precursors with a bouquet-like structure were prepared via the hydrothermal method, and Co 7 Fe 3 /C and Co 9 S 8 /Fe/CoS 2 /C composites were obtained through a carbonization and sulfuration treatment during the high-temperature pyrolysis process, respectively. The experimental and theoretical results show that the Co 9 S 8 /FeCoS 2 /C composite has a better EMW absorption performance, and its optimal reflection loss (RL) value is -53.9 dB at a low filler loading of 20 wt.%, which is due to the S doping that enhances the interface polarization relaxation process and improves the impedance matching characteristics. Moreover, the Co 9 S 8 /FeCoS 2 /C composite can be as candidates of high-efficiency absorbers in extreme application environments.
研究领域:
材料科学
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电磁学
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环境科学
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复合材料
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
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IF 8.6
Caixia Chen,Shumei Wang,Fang Han,Xiaoying Zhou,Benxia Li
The reasonable construction of composite membranes with dual functions of rapid adsorption and photo-Fenton-like oxidation degradation holds great significance in the field of wastewater purification. Herein, a poly(vinylidene fluoride)-based composite membrane (denoted as CFT/PVDF) was meticulously prepared through a nonsolvent induced phase separation (NIPS) process with the introduction of cobalt-iron metal–organic framework (CoFe-MOF) and TiO 2 (Degussa P25). The composite membrane exhibited an excellent adsorption ability for removing a variety of organic pollutants from water. With the integration of adsorptive filtration and in situ photo-Fenton-like degradation, the removal efficiency of tetracycline hydrochloride reached up to 92.9% through the CFT/PVDF membrane in one filtration process, and the remarkable performance could be maintained after ten consecutive cycles. Moreover, a group of CFT/PVDF membranes was connected in series to realize the fast and continuous wastewater treatment. The photo-Fenton-like oxidation mechanism and possible degradation pathways were proposed on the basis of active-species detections and degradation intermediates analysis. The toxicological analysis indicated that tetracycline was in situ degraded into less toxic intermediates and even nontoxic substances by the CFT/PVDF composite membrane. This work provides some valuable guidance on the construction of self-cleaning membranes for sustainable wastewater remediation and potential applications.
✓ 已验证
产品关联
DOI
高影响因子
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