EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
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2024
·Vol. 27
·期 14
·e202300655
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IF 2.2
Lingmei Zhang,Qian Zhao,Chao Feng,Guoning Zhang,Yucheng Wang,Yan Li,Wenjuan Sun,Hong Zhao
Graphical A cobalt-based layered MOF ([Co 2 (μ-SO 4 )(Hppza) 2 (H 2 O) 3 ] n (SEU-1) has been successfully constructed and comprehensively characterized. The maximum specific capacitance of SEU-1 is 145.5 F g −1 at 1 A g −1 , along with the specific capacitance retention of 92.7 % at the current density of 5 A g −1 after 6000 cycles in 3 M KOH solution, suggesting SEU-1 can be applied to high performance SC. Two-dimensional (2D) metal–organic frameworks (MOFs) have been a worldwide research interest due to their potential application in supercapacitors. Herein, a cobalt-based layered MOF ([Co 2 (μ-SO 4 )(Hppza) 2 (H 2 O) 3 ] n , namely, SEU-1 ; H 2 ppza=3-(pyridin-4-yl)-1 H -pyrazole-5-carboxylic acid) has been synthesized via a one-step solvothermal method. Single X-ray diffraction analysis shows that the SEU-1 exhibits a (3,3,4)-connected 2D structure with a Schläfli symbol of (6 2 ⋅ 8)(6 3 )(6 4 ⋅ 8 ⋅ 10). Variable-temperature magnetic susceptibility data display that antiferromagnetic interactions between two Co II ions exist in SEU-1 . The supercapacitive performance has been evaluated in the three-electrode system. Its maximum specific capacitance is 145.5 F g −1 at 1 A g −1 , along with the specific capacitance retention of 92.7 % at the current density of 5 A g −1 after 6000 cycles in 3 M KOH solution. These results demonstrate that SEU-1 is a good candidate for electrode material for electrochemical energy storage.
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
Science of Advanced Materials
·
2023
·Vol. 15
·期 9
·1159-1165
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IF 0.9
Ren Qinhui,Chen Peng,Yang Yaqi,Wei Fuhua,Chen Hongliang,Wang Siyuan,Liang Zhao
In this paper, metal–organic frameworks (MOFs) are applied to get rid of Congo red from effluent in an inexpensive and effective manner. Co-containing MOFs (Co-MOF) were prepared via solvothermal treatment, and their structures were tested by performing SEM, TG, and XRD. The MOFs
were studied for the removal of CR from wastewater, and the kinetics of the adsorption process were investigated. The results indicated that the pseudo second-order kinetic model properly describes the removal of CR and the maximum adsorption capacity within 5 h is 355.2 mg/g for Co-MOF. The
adsorption capacity of the MOFs was evaluated under different pH conditions. This work highlights the broad application prospect of MOFs in sewage disposal.
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
INORGANIC CHEMISTRY
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2024
·
IF 4.3
Jinmiao Wang,Lulu Wang,Ruixue Wu,Chuanbin Fan,Xia Zhang,Yuhua Fan
MOF-based materials, as bifunctional catalysts for electrocatalytic water splitting, play an important role in the application and development of clean fuel hydrogen energy. This study presents a series of novel 3D Co-based MOFs with layered networks, including [Co(4,4′-bipy)0.5(aip)(CH3OH)·H2O]n (Co-MOF 1), [Co2(1,3′-bit)(aip)2(CH3OH)·H2O]n (Co-MOF 2), [Co(4,4′-bipb)(aip)]n (Co-MOF 3), and [Co2(4,4′-bipe)(aip)2·1.5H2O]n (Co-MOF 4). Their single-crystal structures of Co-MOFs 1–4 are characterized and analyzed before being applied in alkaline solutions for water decomposition (OER and HER). The electrocatalytic tests indicate that Co-MOFs 1–4 exhibit a good performance. Notably, Co-MOF 4 exhibits great behavior which has low overpotentials of 94 and 188 mV (OER) as well as 185 and 352 mV (HER) at the currents of 10 and 100 mA cm–2, respectively. In comparison with Co-MOFs 1–3, Co-MOF 4 has the lowest Tafel slopes, highest ECSA, and smallest resistance. The immanent qualities, such as distinct interwoven long chain layered structure, unsaturated coordination modes, and synergistic catalytic qualities among Co ions, contribute to explaining the results. The fundamentals provide valuable information for the investigation of innovative MOF-based bifunctional electrocatalysts for overall water splitting.
研究领域:
材料科学
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能源化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2022
·
IF 9.965
Naseeb Ullah,Aymeric Ramiere,Waseem Raza,Pengfei Ye,Wei Liu,Xingke Cai,Zhengchun Peng,Ki-Hyun Kim
Chemical fixation of CO 2 with epoxides is an effective option to achieve sustainable synthesis of cyclic organic carbonates. Although metal–organic frameworks (MOFs) are promising catalysts for this reaction, their low stability in aqueous solutions makes this application infeasible. In an effort to overcome this limitation, cobalt-based metal–organic framework (Co(II)MOF) nanoribbons have been prepared by coordinating the Co(II) ions with a new ligand (C 16 H 12 N 4 O 4 ) full of oxygen and nitrogen moieties. Strong chemical interactions occur between the adsorbed CO 2 and oxygen/nitrogen atoms in this porous MOF structure. Co(II)-MOF nanoribbons with tetra- n -butylammonium bromide acted as cocatalysts with ∼97% yield of cyclic carbonate (reaction kinetic rate of 14.7 × 10 6 µmol g -1 h −1 ) upon the cycloaddition of epichlorohydrin (ECH) to CO 2 (>99% reaction selectivity under solvent-free reaction condition at 80 °C, 3 h and 1 MPa CO 2 pressure). This work may open a new avenue for chemical fixation of CO 2 by rational design of the components and morphology of MOF-based catalysts.
研究领域:
材料科学
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催化化学
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环境科学
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产品关联
DOI
PubMed
高影响因子
ChemNanoMat
·
2021
·Vol. 7
·期 8
·906-909
·
IF 3.154
Jin Yu,Yang Cao,Qian Liu,Yonglan Luo,Yang Liu,Xifeng Shi,Abdullah M. Asiri,Tingshuai Li,Xuping Sun
It's highly desirable to devise and develop non-precious metal catalysts for efficient water oxidation catalysis in alkaline solution. Herein, we report Co-MOF nanosheet arrays grown on the three dimensional conductive nickel foam (Co-MOF/NF) through a hydro-thermal process for efficient alkaline oxygen evolution electrocatalysis. Such catalyst displays an excellent electrochemical performance by achieving an overpotential of 290 mV at 20 mA cm −2 in 1.0 M KOH. Besides, it possesses both a good electrochemical stability and a high turnover frequency of 0.14 s −1 at the overpotential of 400 mV.
研究领域:
材料科学
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电化学
✓ 已验证
DOI
高影响因子
FUEL
·
2022
·
IF 8.035
Na Geng,Fei Wang,Di He,Fang Wang,Futing Xia,Jiayu Feng,Lijuan Jia,Lidong Wang,Ping Ning
In the wet magnesia desulfurization process, magnesium sulfite oxidation is essential to reclaim and resource utilization the byproducts. Therefore, it is of great significance to create reliable and effective catalysts. In this study, a novel and efficient catalyst, Co-MOF (BTC), was synthesized by an ultrasound assisted one-pot method. The oxidation rate of MgSO 3 by Co-MOF (BTC) was 0.112 mmol·L −1 ·s −1 , 13–14 times higher than under non-catalytic conditions, with an apparent activation energy of 26.82 kJ·moL −1 . The catalytic efficiency is 4–5 times higher than previously reported Co-SBA-15 catalysts with the same loading. The characterization results of XRD, TEM and XPS confirm that the active component cobalt has a high dispersion on TMLA, and Co (II) plays an important role in improving the oxidation performance of catalysts. The results reveal that the rich hydroxyl group on surface of TMLA is conducive to the dispersion of Co for full contact with the reactants, and the Co (II) of Co-MOF (BTC) is favorable to the formation of Co-O bond, and then promotes its oxidative activity. The kinetics of the MgSO 3 oxidation catalyzed by the prepared Co-MOF (BTC) was investigated in a bubble oxidation apparatus, indicating that the oxidation rate was dependent on the reaction temperature, pH value, oxygen partial pressure and air velocity.
研究领域:
环境科学
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材料科学
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催化化学
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DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
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2023
·
IF 3.3
Zhoujie Zhang,Yuhao Li,Jiajia Zhang,Min Fang,Yong Wu
We discovered that triethanolamine (TEOA) can break Co–N bonds in a 2D Co(II)-imidazole MOF, {[Co(TIB) 2 (H 2 O) 4 ]SO 4 } (TIB stands for 1,3,5-tris(1-imidazolyl) benzene) (CoTIB) to form the ultrafine fragments of CoTIB with sizes <5.6 nm under stirring, which are highly efficient and selective (>99%) heterogenous cocatalysts for the visible-light-driven photocatalytic CO 2 reduction reaction to CO. The efficiency of the ultrafine fragments of CoTIB (2.0–4.2 nm) reaches 42.7 mmol g −1 h −1 or a TOF of 33.7 h −1 based on Co atoms, which are among the best of heterogenous cocatalyst for photocatalytic CO 2 RR to CO systems. They are also highly stable under stirring with a TON greater than 909 in 54 h. The ultrafine fragments of CoTIB in mixed solvents were obtained by filtration, using a 0.22-μm filter head, of the 9-h stirred mixture of CoTIB/CH 3 CN/TEOA/trace-H 2 O or the 9-h reaction mixture using 1.0 mg of CoTIB. The fragments of CoTIB in these filtrates were characterized by high-resolution mass spectrometry (HRMS), size distribution and Zeta-potential measurements, ICP-MS, as well as Linear-Sweep-Voltammetry (LSV) measurements. The formation process of these nanoparticles and the mechanism of the photocatalytic CO 2 RRs were proposed. In addition, this work provides an easy method for making ultrafine fragments (<10 nm) of a Co(II)-imidazole MOF or other MOFs, which could also be viewed as MOF nanoparticles or quantum dots stabilized by coordination of TEOA molecules.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
TALANTA
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2022
·
IF 6.556
Mengzhen Ren,Yujie Zhang,Lanlan Yu,Lingbo Qu,Zhaohui Li,Lin Zhang
Nanozyme with the merit of excellent and adjustable catalytic activity, outstanding stability and low cost is a promising alternative for natural enzymes widely applied in a variety of fields. In the present study, a new two-dimensional cobalt-based MOF nanocomposite designated as MVCM@β-CD was synthesized. Combined with the strategies of increasing the ratio of Co(Ⅲ)/Co(Ⅱ) and modifying with small molecule β-cyclodextrin (β-CD), MVCM@β-CD displayed remarkably enhanced oxidase-mimicking activity, which was attributed to synergistic effect from large surface area of two dimensional Co-MOF nanosheet , numerous exposed active sites, high-proportioned trivalence of cobalt and regulating action of β-cyclodextrin. The addition of aminophenol isomers inhibited the catalytic oxidation process, resulting in different color change of the solution and UV–Vis absorption behaviors, based on which a sensitive ratiometric colorimetry for m -aminophenol ( m -Ap) and a simple colorimetric p -aminophenol ( p -Ap) detection method were developed with the detection limit of 0.16 μM and 1.01 μM, respectively. This method realized the colorimetric differentiation of aminophenol isomers, which provided a simple, accurate and low-cost approach for visual discrimination without complicated instrument and procedure, especially appropriate for on-site detection.
研究领域:
生物化学
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分析化学
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材料科学
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DOI
PubMed
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
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2022
·
IF 3.656
Peng Yan,Xiang Li,Deyun Ma,Lijun Li,Yuwen Lan,Zhiyong Li,Xiaoting Lu,Manqi Yang,Fenglan Liang
An ultramicropore MOF , {[Co 6 (5-MIA) 5 (tmbpy)(μ 3 -OH) 2 (ethanol) 2 ]∙(ethanol) 2 } n ( 2 ) (5-H 2 MIA= 5- methoxyl-isophthalic acid; tmbpy = 3,3′-dimethyl-4,4′-bipyridine), was rationally designed and constructed. The gas sorption behavior of 2 for C 2 H 2 , CO 2 , CH 4 , CO, and N 2 was investigate by experiments. The C 2 H 2 and CO 2 uptakes of the activated sample ( 2a ) were up to 64.87 cm 3 g −1 and 63.97 cm 3 g −1 at 273 K (100 kPa), respectively. Specifically, 2a possesses 3.5 Å of aperture and multi-functional sites (open Co 2+ sites and methoxy groups), resulting in the synergistic effect of size sieving and host-guest interactions for selective adsorption of carbon dioxide (or acetylene). The IAST selectivities of C 2 H 2 /CH 4 (1:1) and CO 2 /CH 4 (1:1) on 2a were 26.6 and 12.3 at ambient temperature and 100 kPa, respectively. The easy regeneration, outstanding humid/thermal stability, and good reusability, make it a promising candidate for industrial application of the separation of C 2 H 2 /CH 4 , CO 2 /CH 4 , CO 2 /N 2 and CO 2 /CO.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2023
·
IF 6.6
Jiamin Li,Haochen Shen,Chenxi Ma,Hao Zhang,Peng Luo,Junteng Chen,Manman Mu,Xiaohong Yin
Electrocatalytic reduction of CO 2 (CO 2 RR) into value-added chemicals is a promising approach to alleviate environmental issue, but the efficiencies of electrocatalysts are limited by the poor conductivity, low current density and large overpotential. Herein, two-dimensional bimetallic porphyrin-based conjugated cobalt MOF (Co-(Co+Cu) PMOF) is deposited on g-C 3 N 4 nanosheets to construct g-C 3 N 4 @Co-(Co+Cu)PMOF which enhances electron transfer from g-C 3 N 4 to Co-(Co+Cu)PMOF. Benefiting from its larger capacitance and faster charge transfer rate than g-C 3 N 4 and Co-(Co+Cu)PMOF, g-C 3 N 4 @Co-(Co+Cu)PMOF-50% exhibits superior catalytic activity with a high Faradaic efficiency of CO (97.8%) and large current density of -2.1 mA•cm −2 at -1.4 V compared with pristine Co-(Co+Cu)PMOF and other porphyrin-based MOF analogues. The high performance might ascribe that Co centers in porphyrin rings acquire more electrons to activate CO 2 which can be converted to intermediate *COOH through evidences from the experimental results and theoretical calculations. This work provides a new insight into the rational design of electrocatalysts for the CO 2 RR using porphyrin-based conjugated MOFs.
研究领域:
材料科学
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电化学
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环境科学
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DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2023
·
IF 11.2
Zongshu Xu,Ze Cheng,Qun Tang,Kangqi Huang,Heping Li,Zhiming Zou
Nowadays, there is an increasing demand for smart packaging materials capable of effectively monitoring the food freshness. In this study, new Co-based MOF (Co-BIT) microcrystals with ammonia-sensitivity and antibacterial function were constructed and then loaded within cellulose acetate (CA) matrix to create smart active packaging materials. The influences of Co-BIT loading upon structure, physical, and functional properties of the CA films were then thoroughly explored. It was observed that microcrystalline Co-BIT was uniformly integrated inside CA matrix, which caused significant promotions in mechanical strength (from 24.12 to 39.76 MPa), water barrier (from 9.32 × 10 −6 to 2.73 × 10 −6 g/m·h·Pa) and ultraviolet light protection performances of CA film. Additionally, the created CA/Co-BIT films displayed striking antibacterial efficacy (>95.0 % for both Escherichia coli and Staphylococcus aureus ), favorable ammonia-sensitivity function as well as color stability. Finally, the CA/Co-BIT films were successfully applied for indicating the spoilage of shrimp through discernible color changes. These findings suggest that Co-BIT loaded CA composite films have great potential for use as smart active packaging.
研究领域:
食品科学
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材料科学
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化学工程
✓ 已验证
DOI
PubMed
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2022
·
IF 5.876
Liang Qin,Yan Li,Fenglan Liang,Lijun Li,Yuwen Lan,Zhiyong Li,Xiaoting Lu,Manqi Yang,Deyun Ma
A new microporous 2D Co-based MOF , [Co 3 (C 6 H 3 NO 2 ) 2 (cpna) 2 (DMA) 2 ] n ( 1 ) (H 2 cpna = 6-(4-carboxylphenyl)nicotinic acid; DMA = N,N-dimethylacetamide), has been synthesized and structurally characterized. Complex 1 shows a 2D network with 1D channel of 6.4 × 9.3 Å 2 along the a -axis. Activated 1 ( 1a ) exhibits selective gas adsorption for CO 2 as compared to other gas molecules ( e.g. C 2 H 2 , CH 4 , CO, N 2 ) from the experimental single-component gas-adsorption isotherm (at 273K and 298K), molecular simulation and breakthrough experiments (298K). And the adsorption selectivity (CO 2 /C 2 H 2, CO 2 /CH 4, CO 2 /CO, and CO 2 /N 2 ) was calculated with the ideal adsorbed solution theory (IAST). Activated 1 shows 9.77 wt% (2.22 mmol/g) uptake of CO2 at 1 bar and 273 K. Furthermore, the activation of 1 exhibits high ideal selectivities in adsorption of CO 2 over C 2 H 2 , CH 4 , CO, and N 2 at 298 K (1 bar), which may be attributed to the pyridyl sites on the ligands and open metal sites on the nodes of the framework. Besides, 1a could adsorb more gas molecules due to thicker layer (10.97 Å) of 2D structure.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）