Surfaces and Interfaces
·
2024
·
IF 5.7
Yiqiong Yang,Jiaying Ye,Yixuan Zhai,Bingbing Yang,Mingyao Yin,Yi Xu,Jinfeng Wang,Xiaodong Zhang
In this study, we successfully synthesized ZIF-67 material on three-dimensional (3D) nickel foam (NF) substrate by co-precipitation method, and then fixed CoS x on NF by hydrothermal vulcanization method to form CoS x /NF. The optimized CoS x /NF can effectively activate peroxymonosulfate (PMS) and improve the degradation efficiency of ofloxacin (OFL). The effects of PMS dosage, reaction temperature, initial pH and co-existing ions on the degradation effect of OFL were investigated in detail. CoS x /NF (1 piece 2 × 2 cm) and PMS (1 mM) in an aqueous solution (pH = 7) degraded 85 % of OFL (20.0 mg/L) within 45 min. This favorable degradation performance is mainly attributed to the enhanced electron transfer capability introduced by the bimetallic material. In addition, CoS x /NF still maintained high degradation effect and stable structure after 5 cycles. Quenching experiments further revealed that radicals •OH and 1 O 2 play a major role in degrading OFL. In addition, the degradation pathway, ecotoxicity evaluation and degradation mechanism of OFL were comprehensively investigated. In summary, the CoS x /NF catalyst proved to be a highly efficient, stable and recyclable heterogeneous composite, and opened up the possibility of using Metal-organic framework (MOF) derivatives in fields such as wastewater treatment .
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
MOLECULES
·
2024
·Vol. 29
·期 20
·4860
·
IF 4.2
Fuyan Zhang,Miaomiao Ma,Shuang Li,Yuting Zhou,Jian Zeng,Meiqi Huang,Qi Sun,Tao Le
In the critical domain of wastewater treatment, the development of cost-effective, durable, and recyclable adsorbents with high adsorption capacities remains a significant challenge. This study introduces a novel magnetic bimetallic Metal–Organic Framework (MOF) adsorbent, MZIF-67-Co/Cu, doped with copper ions. The MZIF-67-Co/Cu adsorbent was successfully synthesized and structurally characterized, demonstrating remarkable selectivity for removing methyl orange (MO) from water. This high selectivity is attributed to the adsorbent’s high porosity and Lewis base properties at the coordinating metal ion center. The incorporation of Cu ions significantly enhances the porous architecture and increases the number of metal adsorption sites, leading to an impressive maximum MO adsorption capacity of 39.02 mg/g under optimized conditions (0.5 g/L adsorbent concentration, pH 3.0, 250 rpm agitation speed, adsorption time > 10 min). The adsorption kinetics closely follow the pseudo-second-order model, and the isotherm data fit well with the Langmuir model. The primary adsorption mechanisms involve electrostatic attraction and mesoporous interaction. This study highlights MZIF-67-Co/Cu as a highly efficient adsorbent with magnetic recovery capabilities, positioning it as a promising candidate for addressing critical issues in wastewater treatment.
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
IONICS
·
2021
·Vol. 28
·期 2
·635-645
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IF 2.817
Zhao Wei,Feng Wangjun,Chen Jingzhou,Huang Zhaoyu
Lithium-sulfur batteries (LSBs) are considered the most likely replacement for conventional lithium–ion batteries in next-generation high-energy output solutions based on their high specific capacity (1675 mAh g −1 ) and high-energy density (2600 Wh kg −1 ). But, there are some problems that need to be solved urgently. In this work, an environmentally friendly, green, and low-cost ZIF-67-derived cobalt-based sulfate material (CoSO 4 ) combined with carbon nanotubes was proposed as a sulfur host material. Experiments show that the addition of CoSO 4 can significantly enhance the transformation of polysulfide and suppress the shuttle effect. The best performance is the CNT-CoSO 4 -2/S, which has an initial capacity of 1356.9 mAh g −1 at 0.1 C current density. Furthermore, long-term cycle test was carried out at a current density of 0.2 C; the coulombic efficiency was above 98.63% after 200 cycles. This work demonstrates the potential of cobalt-based sulfates as cathode materials for lithium–sulfur batteries.
研究领域:
材料科学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2023
·
IF 8.2
Mengke Zhao,Guigan Fang,Sufeng Zhang,Long Liang,Shuangquan Yao,Ting Wu
A novel 3D advanced oxidation catalyst ZIF-67@C-CMC/rGO based on carboxymethyl cellulose (CMC) and reduced graphene oxide (rGO) was successfully synthesized by facile in-situ growth of Zeolitic imidazolate framework-67 (ZIF-67). C-CMC/rGO aerogel crosslinked by poly (methyl vinyl ether- alt -maleic acid)/polyethylene glycol system (PMVEMA/PEG) as the host material was prepared through a template-directed growth model and exhibited outstanding mechanical properties. The sustainable composite was successfully used as an efficient catalyst for activating peroxymonosulfate (PMS) to generate SO 4 − · and ·OH, then leads to the removal of organic contaminants. As a result, almost 100 % of 10 ppm MB/RhB solution can be degraded within 5 min due to the combination of catalyst aerogel and PMS. What's more, the aerogel showed a wide pH tolerance range from 4 to 9 and maintained up to 93 % of the contaminant removal rate compared to the initial value after four cycles. The ZIF-67@C-CMC/rGO aerogel with high load rate and excellent catalytic degradation performance not only solved the problem of dispersion and recovery of ZIF-67 particles, but also provided a new idea for the compound wastewater purification in sulfate radical-based advanced oxidation processes (SR-AOPs).
研究领域:
材料科学
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环境科学
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催化化学
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产品关联
DOI
PubMed
高影响因子
WATER ENVIRONMENT RESEARCH
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2024
·Vol. 96
·期 4
·e11027
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IF 2.5
Yifan Ru,Xianghong Gong,Wangyang Lu,Lu Chen,Lanlan Wei,Qizhou Dai
In this study, we synthesized magnetic MnFe 2 O 4 /ZIF-67 composite catalysts using a straightforward method, yielding catalysts that exhibited outstanding performance in catalyzing the ozonation of vanillin. This exceptional catalytic efficiency arose from the synergistic interplay between MnFe 2 O 4 and ZIF-67. Comprehensive characterization via x-ray photoelectron spectroscopy (XPS), x-ray diffraction (XRD), Fourier transform infrared spectrometer (FT-IR), Brunauer–Emmett–Teller (BET), field emission scanning electron microscopy (FE-SEM), and energy dispersive spectroscopy (EDS) confirmed that the incorporation of MnFe 2 O 4 promoted the creation of oxygen vacancies, resulting in an increased presence of l adsorbed oxygen (O ads ) and the generation of additional ·OH groups on the catalyst surface. Utilizing ZIF-67 as the carrier markedly enhanced the specific surface area of the catalyst, augmenting the exposure of active sites, thus improving the degradation efficiency and reducing the energy consumption. The effects of different experimental parameters (catalyst type, initial vanillin concentration, ozone dosage, initial pH value, and catalyst dosage) were also investigated, and the optimal experimental parameters (300 mg/L1.0-MnFe 2 O 4 /ZIF-67, vanillin concentration = 250 mg/L, O 3 concentration = 12 mg/min, pH = 7) were obtained. The vanillin removal efficiency of MnFe 2 O 4 /ZIF-67 was increased from 74.95% to 99.54% after 30 min of reaction, and the magnetic separation of MnFe 2 O 4 /ZIF-67 was easy to be recycled and stable, and the vanillin removal efficiency of MnFe 2 O 4 /ZIF-67 was only decreased by about 8.92% after 5 cycles. Additionally, we delved into the synergistic effects and catalytic mechanism of the catalysts through kinetic fitting, reactive oxygen quenching experiments, and electron transfer analysis. This multifaceted approach provides a comprehensive understanding of the enhanced ozonation process catalyzed by MnFe 2 O 4 /ZIF-67 composite catalysts, shedding light on their potential applications in advanced oxidation processes. Practitioner Points A stable and recyclable magnetic composite MnFe 2 O 4 /ZIF-67 catalyst was synthesized through a simple method. The synergistic effect and catalytic mechanism of the MnFe 2 O 4 /ZIF-67 catalyst were comprehensively analyzed and discussed. A kinetic model for the catalytic ozone oxidation of vanillin was introduced, providing valuable insights into the reaction dynamics.
研究领域:
环境科学
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化学工程
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2020
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IF 7.489
Lin Zhong,Hu Zhou,Ruifeng Li,Ting Bian,Sheng Wang,Aihua Yuan
The design and preparation of metal-organic frameworks (MOFs) as self-sacrificed precursors/templates has been considered as a promising strategy in recent years for fabricating metal/carbon electrocatalysts with intriguing architectures and outstanding properties. However, the serious aggregation during the calcination and the poor electron conductivity are still obstacles for these electrocatalysts which need to be urgently solved. Herein, an in situ confinement pyrolysis protocol is reported to transform ZIF-67 nanocrystals on hollow carbon spheres (HCS) to cobalt and nitrogen-enriched carbon shell, resulting in the formation of hierarchical HCS@Co/NC. This is the first study of electrochemistry for HCS decorated with MOFs or MOFs derivatives. In the structure, metallic Co nanoparticles (NPs) and N species are strongly anchored and dispersed in the network of nanocarbon shell, which not only affords a boosting conductivity but also greatly alleviates the aggregation of active sites. Meanwhile, the unique structure with hollow feature provides an effective pathway for mass transport and shortens the transmission path of electrons. Thanks to the advantages of structure and composition , the HCS@Co/NC catalyst exhibits a superb performance of oxygen reduction reaction , which outperforms the commercial Pt/C benchmark.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Surfaces and Interfaces
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2024
·
IF 5.7
Li Xiao,Shengrui Xu,Yaozong Zhang,Yixin Song,Dapeng Wu,Kai Jiang
Inter-connected zeolite imidazolate framework-67 (ZIF-67) hybrid networks were successfully synthesized by a cellulose nanocrystals (CNCs) mediated spontaneous weaving strategy, which was denoted as ZIF-67@CNC, and was applied to activate peroxymonosulfate (PMS) for Rhodamine B (RhB) degradation. Characterizations results demonstrated that the ZIF-67 nanocrystals are encapsulated within CNCs and subsequently arranged in a string-like configuration. In comparison to pristine ZIF-67, the ZIF-67@CNC catalyst presented superior performances for RhB dye removal both in terms of degradation efficiency and rate, as the kinetic rate constant increased 5.8-fold. This finding was attributed to the improvement in oxygen-containing groups and meso /microporous structures after the introduction of CNCs, leading to efficient binding to compounds and rapid molecular diffusion. Moreover, the ZIF-67@CNC exhibited remarkable stability throughout the catalysis process in aqueous solutions owing to the robust crosslinking between negatively charged CNCs and positively charged cobalt ions , which significantly mitigated the potential secondary pollution of cobalt to the environment. This research opens up new possibilities for the design of highly efficient and durable ZIF-67-based catalysts to promote future wastewater treatment technology.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2017
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IF 6.216
Qinghua Wang,Feng Gao,Biyan Xu,Fuxian Cai,Fengping Zhan,Fei Gao,Qingxiang Wang
In this paper, unique amorphous bimetallic sulfides of CoNi 2 S 4 with nanocage structure were synthesized. The ZIF-67 with typical rhombic dodecahedron structure was first synthesized, and then the bimetallic product was achieved by the ingenious combination of Ni 2+ -induced template scarification of the synthesized ZIF-67 and the sulfuration reaction. The characterization assays showed that the CoNi 2 S 4 nanocages perfectly inherited the rhombic dodecahedral morphology of the ZIF-67, but with many vertical aligned nanosheets on the shell. The CoNi 2 S 4 nanocages were utilized as an electrode material for capacitance test. The results revealed that the synthesized CoNi 2 S 4 nanocages have low charge-transfer resistance, and high specific capacitance of 1890 F g −1 at a current density of 4 A g −1 . The specific capacitance remains 89.9% and 71.6%, respectively after 1000 and 5000 cycling charge-discharge measurements. This excellent performance can be ascribed to the amorphous nature, unique hollow nanocage structure and bimetallic composition of the product. Furthermore, an asymmetric supercapacitor was assembled using CoNi 2 S 4 nanocages as positive electrode materials and Yolk-Shell carbon spheres (YS-CS) as negative electrode materials, and the resulting CoNi 2 S 4 //YS-CS device exhibits a high energy density of 35 Wh kg −1 at a power density of 640 W kg −1 .
研究领域:
材料科学
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能源存储与转换
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产品关联
DOI
高影响因子
CRYSTENGCOMM
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2023
·Vol. 25
·期 7
·1076-1089
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IF 3.1
Aheyelikai Yeerken,Jiangli Lin,Xiaotian Wang,Yulu Luo,Hongying Ma
Triphenylmethane dyes not only can be utilized to dye silk, leather, and paper, but they also play an important part in treating parasitic, fungal, and bacterial infections of fish and fish eggs. Although these dyes are inexpensive and have a wide range of applications, they are poisonous. Therefore, their removal from wastewater is crucial for water purification. Metal–organic (MOF)/polymer porous composites were prepared by compounding highly porous MOFs with organic polymers with good stability and hydrophilicity to realize the highly efficient and stable adsorption of triphenylmethane dyes in wastewater over multiple cycles. Porous ZIF-67/PES composite microspheres for the adsorption of triphenylmethane dyes were successfully synthesized via in situ growth, and their adsorption conditions were optimized on the basis of time, pH and NaCl concentrations to investigate their adsorption performance. The as-synthesized porous ZIF-67/PES composite microspheres were characterized by using scanning electron microscopy, X-ray diffractometry, and Fourier transform infrared spectroscopy. Their adsorption kinetics and mechanisms were also studied. Their reusability and stability after cyclic adsorption processes were also investigated. The maximum adsorption capacity of the porous ZIF-67/PES composite microspheres for MG, FA and CV was 5743.28 mg g−1, 2176.52 mg g−1, and 122.78 mg g−1, respectively. Therefore, porous ZIF-67/PES composite microspheres are a potential and efficient absorbent for triarylmethane dye removal.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2023
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IF 9.5
Yuxiu Sun,Yunshuo Gao,Chenxu Geng,Zhengqing Zhang,Zhihua Qiao,Chongli Zhong
Metal-organic frameworks (MOFs), as a typical type of porous materials, are widely used as fillers in mixed matrix membranes (MMMs) to enhance the gas separation performance. However, non-selective interface defects are prone to appear in MMMs under high MOF loading conditions, meanwhile, the discontinuous dispersion of MOF particles in polymeric matrices makes the gas molecules diffuse along the MOF-polymer-MOF intersection path and difficult to achieve efficient molecular transfer. These factors greatly compromise the ability of MOF to enhance membrane separation performance. Herein, the [C 5 min][BF 4 ] encapsulated ZIF-67 (IL@ZIF) composites were embedded into the defect-free IL/Pebax ion gel matrix to form a mixed matrix ion gel membrane without interface defects. On the basis of good interfacial compatibility, the relatively continuous and highly selective CO 2 transmission channels were constructed via increasing the filler loading up to 80 wt%. In this context, the typical IL@ZIF/IL/Pebax membrane with 80 wt% IL content and 70 wt% IL@ZIF doping amount exhibits a CO 2 permeability of 408.2 Barrer and CO 2 /N 2 selectivity of 97.2, surpassing the latest upper line. This work may have high reference value in the construction and preparation of MOF-based MMMs with high performance in gas separation.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2024
·
IF 7.1
Na Wang,Xiang Zhou,Youming Dong,Ying Zhang,Rong Liu,Haijiao Kang,Kaili Wang,Jianzhang Li
Natural mildew preventives, like citral, have great potential to protect bamboo from mildew, while their long-lasting antimildew performance is yet to be challenged owing to their oxidability and volatility. Inspired by biomimetic mineralization, in this work, citral@ZIF-67 particles were synthesized by encapsulating citral into a zeolite imidazolate framework-67 (ZIF-67) cage and introduced into a bamboo structure. Benefiting from the unique cage structure and large surface area of ZIF-67, it can encapsulate sufficient citral molecules. The encapsulation reduced the particle size of ZIF-67 due to the nucleation of citral. Furthermore, the surface area, pore size, and volume of citral@ZIF-67 particles gradually decreased with the increase in loading amounts of citral. ZIF-67 exhibited a certain antibacterial ability against E. coli and S. aureus. The encapsulation of citral can further enhance the antibacterial activity of ZIF-67. In addition, the citral@ZIF-67 showed slow-release performance that followed the Fickian diffusion mechanism. After the citral@ZIF-67 treatment, bamboo showed no mold spots on the surface with an infection grade of 0, which was retained, even though bamboo was conditioned at 50 °C and 85% relative humidity for 10 days. This proposed method can effectively improve the stability of natural mildew preventives and endow bamboo with long-term antimildew properties with low cost and minimized environmental impacts.
研究领域:
材料科学
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生物学
·
林业科学
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产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2022
·
IF 4.326
Chenxu Wang,Feng Yu,Ke Lu,Zhimou Wang,Jie Yu,Wentao Bao,Gang Wang,Banghua Peng,Xuhong Guo
The traditional preparation methods for metal–organic framework (MOF) materials include direct mixing, solvothermal, and mechanical methods. These methods are conducted through several days of slow coordination reactions and discontinuities. Presently, pure organic solvents are used to synthesize MOFs, leading to harsh conditions for MOF synthesis. Therefore, this study used the multi-inlet vortex mixer and MeOH, EtOH, H2O, and Baijiu to synthesize the Co-MOF. They can solve the problem of the uneven macromixing and slow penetration of materials into the microchannel compared to the traditional synthetic intermittent method, while providing continuous rapid industrial magnification and other characteristics. MOF materials were synthesized using Baijiu as a solvent for the first time. Baijiu as the solvent reduced the synthetic conditions of MOF materials and allowed for the reuse of industrial ethanol wastewater, making the synthesis of MOF materials convenient. The catalyst, Co@N-C-FNP-Baijiu, prepared by carbonizing ZIF-67-FNP-Baijiu using Baijiu as the solvent has Eonset = 0.93 VRHE and E1/2 = 0.82 VRHE, which is second to the oxygen reduction reaction performance of the catalyst prepared using MeOH as the solvent. The open-circuit voltage, peak power density, and specific capacity of Zn-air batteries assembled with Co@N-C-FNP-Baijiu as cathode catalysts are similar to those of Pt/C batteries.
研究领域:
材料科学
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化学工程
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能源科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）