CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Wenhui Li,Xiufang Shen,Zhonglin Chen,Tian Tian,Chenyong Liu,Cheng Gu,Weichuan Qiao,Ming Zhang
Ozone oxidation as a means of water treatment has received great attention in recent years, but ozone has low solubility and utilization, which hinders their efficient treatment of refractory pollutants. Herein, a dopamine-encapsulated 2D MOF strategy is proposed, where different metal salts including (acetylacetone iron, manganese, copper, etc.) are doped in it as active site precursors. After pyrolysis, 2D hollow porous carbon nanosheet catalysts such as Mn-HCNSs, Fe-HCNSs, Cu-HCNSs and Co-HCNSs are formed due to the rigid interface-induction of dopamine. Mn-doped Mn-HCNSs exhibits the best catalytic degradation performance when the antibiotic tetracycline is used as the target pollutant, and the degradation efficiency reached 90 % within 25 min (k = 0.213 min −1 ). This excellent catalytic performance can be attributed to several advantages: (i) the hollow porous 2D structure facilitates mass transfer and enhances the reaction kinetic constants; (ii) the confinement effect of dopamine wrapping facilitates the generation of more dispersed active sites and accelerates its ozone decomposition efficiency. This study expands the application of 2D MOF-derived porous carbon materials in ozone oxidation.
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
ChemistrySelect
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2024
·Vol. 9
·期 44
·e202403927
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IF 1.9
Hui Han,He Cui,Jiabo Wang,Kai Ge,Yongfang Yang
Graphical In this paper, 2D MOF-Co, 2D MOF-Co/Cu, and 2D MOF-Co/Cu/Fe are designed and prepared using 1,4-benzendicarboxylic acid (1,4-BDC) as organic ligands. Their charge transfer, separation efficiency, and effects on photocatalytic CO 2 reduction are studied. The results show that 2D multimetallic MOF-Co/Cu/Fe has better photocatalytic CO 2 reduction activity, so it has higher research value and development prospect in the field of photocatalytic CO 2 reduction. In this study, 2D multimetallic MOFs combined with the advantages of 2D nanosheets, with the synergetic effect of multimetallic nodes, exhibited good photocatalytic activity for reduction of CO 2 . Herein, a 2D MOF-Co/Cu/Fe were successfully prepared via one-pot stirring of the solutions of multimetal salts and organic ligands at room temperature. Introduction of the second and third metal (Cu and Fe) into MOF-Co does not change the 2D morphology of MOFs, although it improved the photocatalytic CO 2 reduction performance by broadening the light absorption range of 2D MOF-Co, accelerating the separation efficiency and transfer rate of photogenerated carriers. Upon irradiation with full-spectrum light, the average CO yield of 2D MOF-Co/Cu/Fe achieved 17.06 µmol·g −1 ·h −1 , being about 1.8 and 1.2 times that of 2D MOF-Co and 2D MOF-Co/Cu. This work provides an insight into 2D multimetallic MOFs-based photocatalysts in catalytic CO 2 reduction.
研究领域:
材料科学
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环境科学
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化学
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DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2019
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IF 3.218
Bingbing Liu,Xiaoya Wang,Yunyun Zhai,Zulei Zhang,Haiqing Liu,Lei Li,Herui Wen
Due to its nano-thickness, fast mass transfer and excellent electron transfer capability, two-dimensional (2D) MOF are an efficient strategy to develop good electrocatalytic materials. In this paper, 2D-MOF were synthesized by facile and cost-efficient methods. MOF can be fast prepared with nucleation and crystal growth in several minutes at room temperature , leading to very thin 2D Co-MOF. Herein, Co, Ni and NiCo-based 2D MOF as non-enzymatic H 2 O 2 sensors at different oxidation potentials in KOH solution, the Co-MOF exhibited excellent H 2 O 2 oxidation and detection performance including a wide linear range from 0.5 μM to 832.5 μM, low detection limit of 0.69 μM, and very fast sensing response in basic solution. By taking advantage of excellent conductivity, the Co-MOF showed the low oxidation potential for H 2 O 2 and good detection performance at 0.25 V. It was comparable to most carbon materials and reported MOF materials for H 2 O 2 detection. We insist that 2D MOF is effective for creating active catalysts. The 2D Co-MOF performed higher electrochemical sensitivity with high stability, conductivity, and selectivity. It indicates 2D MOF has potential employment in the fabrication of sensing devices.
研究领域:
材料科学
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分析化学
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DOI
高影响因子
Journal of Energy Storage
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2024
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IF 8.9
Li-Juan Sun,Xiao-Yue Zhang,Chao Bai,Hui-Lin Guo,Chen-Min Han,Yi-Fan Zhang,Huai-Ming Hu
Three cobalt/nickel 2D MOF nanosheets (Co-nanosheet, Ni-nanosheet, CoNi-nanosheet) with a new bithiophene-tetraterpyridyl derivative organic ligand (4′,4″″,4″″″′,4″″″″″-([2,2′-bithiophene]-3,3′,5,5′-tetrayltetrakis(benzene-4,1-diyl))-tetra-2,2′:6′,2″-terpyridine, BTTB-tpy) were synthesized by a liquid-liquid interface coordination polymerization method. The electrochemical performance of these 2D MOF nanosheets was investigated by electroanalytical techniques using the three-electrode and two-electrode systems. The bimetallic CoNi-nanosheet has the best electrochemical properties , with a specific capacitance of up to 1034.0 F g −1 at a current density of 1 A g −1 and displays an excellent cycling stability with the capacitance retention rate of 86 % after 1000 cycles. In addition, the assembled CoNi-nanosheet//AC asymmetric supercapacitor (ASC) device exhibited a maximum energy density of 48.7 Wh kg −1 at a power density of 800.0 W kg −1 and the capacitance retention rate of 73 % after 5000 cycles at a current density of 5 A g −1 . The excellent electrochemical performance of bimetallic CoNi-nanosheet is likely attributed to that Ni and Co atoms in CoNi-nanosheet have a higher oxidation state.
研究领域:
材料科学
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电化学
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Minjun Liu,Ying Liu,Xinru Liu,Chengcheng Chu,Ducheng Yao,Shun Mao
Metal organic framework (MOF)-derived materials normally have three-dimensional (3D) structure, while little attention has been paid to two-dimensional (2D) MOF-derived materials with high catalytic activity. Nevertheless, the underlying agglomeration and metal leaching issues of 2D MOF-derived catalysts hinder their real applications. In this work, we report a bimetallic nanocomposite (Ni-Fe-C-600-acid/GO) derived from 2D Ni-Fe-MOF and graphene oxide (GO) network. Employing Ni(0) and Fe 3 O 4 as active site, the Ni-Fe-C-600-acid/GO shows high efficiency in peroxydisulfate (PDS) activation for the removal of p-chloroaniline (PCA), and the catalyst/PCA dosage ratio (0.8) is substantially lower than those of the previous studies (3.9–156.9). The prepared catalysts demonstrate high catalytic activity over a wide pH range of 3–9 and maintain high efficiency after five cycles with good tolerance to inorganic anions. The singlet oxygen is identified as the predominant active species and relatively weak contributions from sulfate free radicals and hydroxyl radicals are confirmed. This catalysis system presents new insights in 2D MOF-derived catalysts in advanced oxidation processes .
研究领域:
材料科学
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环境工程
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催化
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纳米技术
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DOI
高影响因子
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