JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
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2023
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IF 6.1
Jing Xu,Zezhong Li,Zhenlu Liu,Shengming Xu,Xinyu Liu
A novel composite is constructed by loading ZIF-8 on Cu 2 O by in situ growth. By visible light driven semiconductor and π-π* conjugation effect of the metal–organic framework, the migration ability of photogenerated carriers is improved, and electrons are accumulated to participate in hydrogen ion reduction. The superior hydrogen evolution performance (981.8 μmol·g −1 ·h −1 ) and stability test indicate that the coupling of ZIF-8 and semiconductor Cu 2 O successfully improves the catalytic capacity of the material. Cu 2 O provides a place to stimulate activity for ZIF-8 with high specific surface area. The electron transfer mechanism in composites is studied by electrochemical and spectroscopy methods. This work also provides a new opportunity for the in-situ growth of metal–organic frame materials onto single-metal oxides.
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高影响因子
Journal of Energy Storage
·
2023
·
IF 9.4
Zengcai Guo,Jianpeng Mu,Junpeng Wang,Jingbo Mu,Hongwei Che,Feng Li,Hang Yang,Lixin He,Fangfang Wei
How to design and synthesize of advanced MOF-based electrode materials for high-performance supercapacitors is still a huge challenge, herein, CoNi-MOF@Ni 3 S 2 and ZIF-67/Ni 3 S 2 with unique heterostructures are rationally designed and constructed. The composite electrode materials not only make up for the poor conductivity of MOF, but also improve the structural stability of Ni 3 S 2 . As expected, the optimized ZIF-67/Ni 3 S 2 and CoNi-MOF@Ni 3 S 2 electrode demonstrates a remarkably enhanced specific capacitance of 1017.13 F g −1 and 1930.04 F g −1 at 1 A g −1 , respectively, which are higher than those of their respective monomeric components. Finally, ZIF-67/Ni 3 S 2 //AC and CoNi-MOF@Ni 3 S 2 //AC devices were assembled, which delivered an impressive energy density of 94.49 and 125.34 Wh kg −1 , along with the corresponding power density of 966.34 W kg −1 971.86 W kg −1 , respectively. Moreover, by comparison, the CoNi-MOF@Ni 3 S 2 electrode material exhibits better supercapacitor performance than ZIF-67/Ni 3 S 2 . This effective protective strategy provides an alternative way for constructing MOF or sulfide electrodes with remarkably improved energy storage performance.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2023
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IF 8.6
Hesong Wang,Jinlong Wang,Jing Zhao,Han Zhang,Luming Liu,Xueying Sun,Guibai Li,Heng Liang
As an emerging metal organic framework (MOF) material, MIL-101(Cr) has a large specific surface area and good hydraulic stability, making it ideal in applications before ultrafiltration (UF). However, the unclear interaction between MIL-101(Cr) and natural organic matter (NOM) was identified as the main limitation to understand membrane fouling. To reveal the working mechanisms of NOM removal using MIL-101(Cr), an integrated system of MOF and UF was constructed and operated in separation mode (SM) and coating mode (CM). Based on the results, MIL-101(Cr) had a high NOM adsorption capacity of 68.454 mg/g for HA and 174.725 mg/g for BSA at saturation. Permeate quality improvement occurred in both modes over a 37.7% UV 254 removal rate and a 15% fluorescence intensity decrease, and permeation performance of the hybrid system was simultaneously enhanced. We found that MIL-101(Cr) influenced membrane fouling behaviors and models because of the foulant transformation in SM and dispersed NOM in the MIL-101(Cr) layer in CM. Furthermore, MIL-101(Cr) played a dual role in the integrated system. It could remove NOM by adsorption, leading to membrane fouling reduction, but also caused additional filtration resistance. Notably, MIL-101(Cr) showed the overall positive effects due to its open hollow structure and good hydrophilicity. The π-π interactions and salt-bridges between MIL-101(Cr) and NOM played a dominant role in adsorption. Whilst SM was more efficient in membrane fouling mitigation due to reduced membrane fouling resistance and a normalized flux increase above 15%, CM could achieve the same permeate quality with less MIL-101(Cr) usage and reaction time. This study reveals the interaction between MIL-101(Cr) and NOM and their effects on UF, providing a scientific basis for the widespread application of MOFs.
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FOOD CHEMISTRY
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2023
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IF 8.8
Ting Wang,Lei Zhang,Jieyuan Zhang,Gaoxian Guo,Xinhui Jiang,Zhengwei Zhang,Siqiao Li
Carbendazim (CBZ), a well-known benzimidazole pesticide, is utilized in agriculture to prevent and cure plant diseases caused by fungi. Residual CBZ in food poses serious threat to human health. Herein, a fluorescent two-dimensional terbium-based metal–organic framework (2D Tb-MOF) nanosheet sensor was developed for the rapid and ultrasensitive detection of CBZ. The 2D Tb-MOF nanosheets, prepared with Tb 3+ ions and 5-borono-1,3-benzenedicarboxylic acid (BBDC) as the precursors, exhibited excellent optical properties. Upon the addition of CBZ, the fluorescence of Tb-MOF nanosheets was quenched because of the inner filter effect (IFE) and dynamic quenching. The fluorescence sensor offered two linear ranges of 0.06–4 and 4–40 µg/mL with a low detection limit of 17.95 ng/mL. Furthermore, the proposed sensing platform was successfully applied to assay CBZ in apples and tea, and satisfactory results were obtained. This study provides an effective alternative strategy for the qualitative and quantitative determination of CBZ to ensure food safety.
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PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
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2023
·Vol. 47
·期 20
·9870-9878
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IF 3.3
Junjie Liu,Jingsheng Ma,Kun Tang,Rui Wang,Yongjian Wu,Cheng Qu,Mingzai Wu
It is of great significance for chemical energy storage devices, especially for the practical application of rechargeable zinc–air batteries (ZABs), to find efficient and economical bifunctional catalysts. Metal–organic frameworks (MOFs) have recently become hot research materials, and are often used as precursors of catalysts. This paper reports a carbon skeleton-coated bimetallic sulfide derived from MOF nanostructures that were used as cathode catalysts for ZABs. The N,S co-doped carbon-loaded FeS2,CoS2 ((Co,Fe)S2/CNS) catalysts exhibit excellent electrochemical properties in alkaline solutions due to the protection of metal sulfides by the carbon structure, the synergy of bimetallic Fe and Co, and the high surface area of the carbon skeleton. (Co,Fe)S2/CNS catalysts show a very low potential difference (ΔE = 0.68 V), a high specific capacity (759.1 mA h g−1) and good charge–discharge cycling performance (360 cycles/120 h) when applied to ZABs. This indicates that the prepared (Co,Fe)S2/CNS catalysts have a broad application prospect in the field of ZABs.
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JOURNAL OF SOLID STATE CHEMISTRY
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2023
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IF 3.3
Zhiqiang Guo,Jian Zhou,Hui Hou,Xinmiao Wu,Yuan Li
In this study, Mg-MOF-74, an environmentally friendly metal-organic framework material with non-toxic Mg elements as the framework centers, was loaded onto low-cost and green cellulose aerogels via an in-situ growth approach to construct the Mg-MOF-74@CA composite with a three-dimensional porous structure, overcoming the problems that Mg-MOF-74 nanoparticles tend to agglomerate and cannot be easily recovered. The removal performance of the synthesized Mg-MOF-74@CA composite towards Pb(II), Cd(II), and Cu(II) was evaluated by combining batch experiments, model fittings, and characterization analyses (SEM, XRD , FTIR, MIP, TG, and XPS). The results show that the porosity of Mg-MOF-74@CA is 84.447%. The removal of Pb(II), Cd(II), and Cu(II) by Mg-MOF-74@CA reach the equilibriums at about 5 h. And the removal of Pb(II), Cd(II), and Cu(II) by Mg-MOF-74@CA are strongly influenced by solution pH, while almost independent of ionic strength and humic acid (HA). The strong complexation of Pb(II), Cd(II), and Cu(II) with the surface sites of Mg-MOF-74@CA is the main removal mechanism. The maximum adsorption capacities of Mg-MOF-74@CA towards Pb(II), Cd(II), and Cu(II) at 298 K are 223.555, 160.033, and 74.349 mg/g, respectively. Interestingly, the selective binding order of Mg-MOF-74@CA for Pb(II), Cd(II), and Cu(II) is Cu(II)>Pb(II)>Cd(II). In summary, the Mg-MOF-74@CA composite has good application prospects in practical wastewater treatment.
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Environmental Technology & Innovation
·
2023
·
IF 7.1
Luohao Yuan,Juan Chai,Shiwei Wang,Tong Li,Xinyuan Yan,Jianguo Wang,Hongfeng Yin
The successful combination of chemo- and enzyme catalysis technologies in wastewater treatment has presented great potentialities as well as challenges for decades. Herein, laccase (Lac) was immobilized on the Cu 2 [email protected] by covalent linkage to obtain a stable composite (Cu 2 [email protected] ) with synergistic catalytic activity. The Cu 2 [email protected] with peroxidase-like activity was in situ synthesized by microwave-assisted assembly method. Cu 2 [email protected] exhibited high activity recovery, large immobilization capacity, remarkable tolerance to pH and high temperature conditions. Based on the prepared mimic multi-enzyme system, Cu 2 [email protected] showed broad application prospects in degradation and detection of phenolic compounds. The synergetic catalytic degradation efficiency reached 82.5% in 2h and the limit of detection (LOD) was 0.29 μ M in the range of 0-200 μ M of 2,4-dichlorophenol (2,4-DCP). Further investigation found that chemo- and enzyme catalysis jointly accelerate the degradation of 2,4-DCP, and the hydroxyl radical (•OH) mediated radical pathway serve a predominant role. Therefore, the chem-enzyme integrated catalyst presented in this work provides a promising platform for organic pollutants degradation and detection by combining the enzymes and Cu 2 [email protected]
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JOURNAL OF SOLID STATE CHEMISTRY
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2023
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IF 3.3
Abid Hussain Shah,Zain Ul Abideen,Sumaira Maqsood,Farzana Rashid,Rafi Ullah,Attiq Ur Rehman,Muhammad Dildar,Manzoor Ahmad,Kifayat Ullah,Muhammad Numan Rafi,Fei Teng
In this study, copper based metal organic frame work (Cu-MOF) was synthesized by using different solvents i. e. H 2 O, Dimethylformamide (DMF) and DMF + C 2 H 5 OH + H 2 O solutions at various temperatures. Cu-MOF synthesized in different solvents exhibited a large number of properties and advantages including easy synthesis procedure, high porosity, good crystallinity , high surface area, massive pore volume , controllable pore surface properties (zeta potential), rigid and chemical stability. The as-synthesized Cu- MOF was analysed by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Scanning electron microscopy (SEM), Brunauer–Emmett–Teller (BET) surface area, zeta potential , electrostatic attraction and Thermal gravimetric analysis (TGA). A higher BET surface area of 121.1 m 2 g −1 was obtained for Cu-MOF synthesized in DMF + C 2 H 5 OH + H 2 O compared with H 2 O (109.3 m 2 g −1 ) and DMF (115.1 m 2 g −1 ) solvents. The as-obtained Cu-MOF was used to investigate adsorption kinetic performances of methylene blue (MB) and methyl orange (MO) dye molecules. Compared with other samples, Cu-MOF synthesized in (DMF + C 2 H 5 OH + H 2 O) has a significantly enhanced adsorption ability for MB but a lower for MO dyes. After 4 min, the adsorption co-efficient ( k) values were calculated to be 0.506, 0.846 and 1.1915 min −1 for MB and 0.029, 0.024 and 0.005 min −1 for MO dyes for Cu-MOF (H 2 O), Cu-MOF (DMF) and Cu-MOF (DMF + C 2 H 5 OH + H 2 O), respectively. It was found that Cu-MOF has a higher adsorption for MB dye but a poor adsorption capacity for MO, which was attributed to the electrostatic attraction/repulsion phenomena. Moreover, compared with Cu-MOF (DMF) and Cu-MOF (H 2 O), Cu-MOF (DMF + C 2 H 5 OH + H 2 O) shows an improved stability at 370, 417 and 423 °C temperatures. The result obtained through experiment suggested that porous Cu-MOF microstructures synthesized in DMF + C 2 H 5 OH + H 2 O have potential application for the treatment wastewaters having MB and MO dyes.
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Molecular Catalysis
·
2023
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IF 4.6
Ziliang Yuan,Xun Li,Guanghui Wang,Zhihua Zhu,Yuhe Liao,Zehui Zhang,Bing Liu
The selective hydrogenation of N -heteroarenes into N -heterocycles is a highly important organic transformation in fine chemical industry, as N -heterocycles are moieties in a variety of pharmaceutical and bioactive compounds. Here, we report highly efficient mesoporous CeO 2 supported Ni catalysts prepared by the incipient wet impregnation and following high-temperature reduction for the selective hydrogenation of N -heteroarenes. The experiments indicated that the synergistic effect between CeO 2 and Ni nanoparticles was responsible to the superior catalytic performance. Various kinds of N -heterocycles were obtained at 120 °C with yields of 86 ∼ >99%, demonstrating the versatility of the developed method. This work is valuable for guiding the design and manipulation of low metal loading, cost-effective and robust hydrogenation catalysts.
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高影响因子
MICROCHEMICAL JOURNAL
·
2023
·
IF 4.8
Lili Xiao,Xinhua Fang,Yuan Cao,Lin Hu,Jin Jiang
In this work, a new rod-like Ni-MOF (rNi-MOF) acted initially as an important catalyst in hydrolyzing of extrinsic Ni 2+ . Then rNi-MOF would also be etched by protons (the other product of hydrolysis) resulted in increasing free Ni 2+ that can bond with OH − for in-situ formation of Ni(OH) 2 coated on rNi-MOF. The amount of extrinsic Ni 2+ and water showed significant influences on morphology of rNi-MOF/Ni(OH) 2 . It was found the rNi-MOF/Ni(OH) 2 prepared by 4 mL water and 0.5 mmol Ni 2+ exhibited excellent electrochemical performances in detection of glucose due to its high specific surface area (220 m 2 g −1 ), abundant active Ni(II)/Ni(III) pairs. The rNi-MOF/Ni(OH) 2 modified glassy carbon electrode (rNi-MOF/Ni(OH) 2 /GCE) exhibited a high sensitivity of 3616 μA mM −1 cm −2 , the low detection of limit (0.7 μM). Moreover, the proposed modified sensor displayed a high reproducibility and stability which set a foundation for promising application in detecting of glucose in human serum with good recoveries (95 %–105 %).
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APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Menglin Li,Xinpeng Wang,Jian Zhang,Yonghao Gao,Wen Zhang
The capture of toxic radioiodine is an increasingly important priority for the safe development of nuclear energy. Copper is a promising alternative for expensive silver to capture iodine. To develop novel copper-based adsorbents and determine the effect of copper species on iodine adsorption, the metal–organic framework with dual-pyrazole ligands (MOF-303) is employed as the scaffold to bind Cu 2+ species. Cu 0 nanoparticles were formed after the reduction by NaBH 4 . The obtained Cu 2+ -MOF-303 and Cu 0 -MOF-303 show high iodine uptake capacities at 353 K, 747 mg·g −1 and 837 mg·g −1 , respectively. They also show high iodine uptake capacities of more than 300 mg·g −1 at a high temperature (423 K), which are better than other Cu-based adsorbents. Besides, the loading of Cu can enhance the iodine selectivity under humid vapor, and iodine adsorption rate in iodine-cyclohexane solutions. The Cu 0 on Cu 0 -MOF-303 can react with iodine directly via the redox mechanism. For Cu 2+ -MOF-303, the adjacent pyrazole ligands can chelate with Cu 2+ ions strongly and transfer charges to trapped iodine to form polyiodide anions, and thus stable CuI species could also be generated. The strategy of anchoring Cu species using MOF-303 provides large channels for iodine diffusion, and highly-dispersed Cu and N sites for iodine capture.
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高影响因子
ChemNanoMat
·
2023
·Vol. 9
·期 3
·e202200521
·
IF 3.8
Xinjie Guo,Xingyu Gan,Yun Wang,Xiaoxia Lv,Fengxiang Wang,Shuxin Wang,Shan Peng
Graphical A Co/CoO@NC/CNT-10 catalyst was effectively synthesized using melamine-assisted pyrolysis with Co-MOF as the precursor. With the synergistic effect of metal species, oxygen defects and N-doped carbon nanotubes, the intrinsic activity and electron transfer ability of the catalysts were greatly improved, showing excellent electrocatalytic oxygen reduction performance. Low-cost and high-efficiency oxygen reduction reaction (ORR) electrocatalysts are the basis for large-scale applications of electrochemical energy storage and conversion technologies such as fuel cells and metal-air batteries. Herein, cobalt and oxygen vacancy-rich cobalt oxide encapsulated in nitrogen-doped carbon and carbon nanotubes (Co/CoO@NC-CNTs) have been prepared by direct solid-state pyrolysis of Co-MOF. The carbon morphology, oxygen vacancy content and type of nitrogen can be finely tuned by mixing Co-MOF with proper amounts of melamine. The optimized material has an interwoven CNT structure with abundant micro- and mesopores, suitable nitrogen type and certain number of oxygen vacancies and exhibiting outstanding ORR electrocatalytic performance in alkaline media with an onset potential of 0.96 V and a half-wave potential of 0.88 V vs RHE, which is higher than 20 wt% Pt/C, as well as being highly stable and well resistant to methanol.
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