CHEMICAL ENGINEERING JOURNAL
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2020
·
IF 10.652
Wenjuan He,Zuopeng Li,Shengchen Lv,Mingxin Niu,Wenfeng Zhou,Jing Li,Runhua Lu,Haixiang Gao,Canping Pan,Sanbing Zhang
The Fe 3 O 4 @MIL-100(Fe) hybrid composites are successfully synthesized via an in-situ growth method and characterized using various techniques. The ability of the magnetic metal–organic framework to promote photo-Fenton like processes is investigated using levofloxacin as a representative substrate. The results show that the composite with a Fe 3 O 4 :MIL-100(Fe) mass ratio of 1:4 has a higher degradation efficiency (up to 93.4%) than Fe 3 O 4 , MIL-100(Fe), and the other fabricated composites. This higher catalytic activity is ascribed to the synergistic effect between Fe 3 O 4 and MIL-100(Fe), by which the quick separation of hole-electron pair from MIL-100(Fe) and the efficient reduction of Fe 3+ to Fe 2+ in the photo-Fenton reaction are mutually promoted. Moreover, the composite shows favorable recyclability without apparent loss of apparent photo-Fenton activity even after five cycles, and more importantly, can be recovered magnetically. The possible degradation mechanism and intermediates of levofloxacin in the photo-Fenton reaction have been tentatively proposed based on free radical quenching, electron paramagnetic resonance and mass spectrometry analysis. Finally, the developed Fe 3 O 4 @MIL-100(Fe) is successfully applied for the removal of levofloxacin from spiked wastewater with removal efficiencies ranging from 77.9 to 85.5%, which indicates that the proposed system has significant potential for wastewater treatment applications.
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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产品关联
DOI
高影响因子
Nanoscience and Nanotechnology Letters
·
2019
·Vol. 11
·期 2
·229-233
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IF 0
Zhao Tian,Yu Jun,He Ziyu,He Nongyue,Dong Ming,Chen Zhu,Chen Hong
The well investigated chromium-benzenedicarboxylate metal-organic framework (MOF), nano-sized MIL-101(Cr), was synthesized in this study by using tetramethylammonium hydroxide (TMAOH) or acetic acid (HAc) as modulator. The addition of TMAOH/HAc played a crucial role on particle size
and morphology of MIL-101(Cr). The obtained MIL-101(Cr) had average diameter of about ∼90 nm in selected condition, and possessed relatively high porosity (the BET surface area can up to 3500 m2/g). Furthermore, compared to bulk phase MIL-101(Cr), the nano-MIL-101(Cr) presented
significant improvement of catalytic activity in oxidation of indene.
研究领域:
化学
·
材料科学
✓ 已验证
DOI
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
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IF 5.4
Zhicong Yuan,Xuelian Chen,Xiqiang Pan,Guojuan Hai
The development of efficient electrocatalysts through heterostructure engineering is crucial for boosting the oxygen evolution reaction (OER) kinetics. Herein, we demonstrate a hierarchical MIL-53/NiCu-LDH(12) heterostructure in-situ grown on nickel foam (NF), where the MIL-53 component is controllably constructed on NiCu-LDH/NF to establish robust interfacial contact and electronic coupling. This multi-level architecture synergistically endows the catalyst with enlarged electrochemical active surface area, abundant accessible active sites, accelerated electron transfer kinetics, and reduced band gap. Remarkably, operando characterization reveals that the heterojunction undergoes partial structural reconstruction during OER to generate γ-FeOOH/γ-NiOOH active phases. The formed Fe-O-Ni bridging bonds facilitate interfacial charge redistribution, which effectively modulates the electronic configuration and optimizes reaction intermediates adsorption. Benefiting from these merits, the MIL-53/NiCu-LDH(12)/NF electrode delivers exceptional alkaline OER performance, requiring ultralow overpotentials of 160 and 226 mV to achieve current densities of 10 and 100 mA cm −2 , respectively, along with a small Tafel slope of 42 mV dec −1 . This work proposes an innovative strategy integrating hierarchical architecture design with interfacial electronic modulation for developing advanced transition metal-based OER electrocatalysts.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
CHEMOSPHERE
·
2022
·
IF 8.943
Cheng Cheng,Dongyun Chen,Najun Li,Hua Li,Qingfeng Xu,Jinhui He,Jianmei Lu
This paper reports the application of NH 2 -MIL-125(Ti) modified carbon nitride C v -C 3 N 4 with carbon vacancies in the removal of NO. We performed a series of characterizations of the complex and compared various ratios with the individual components. The results of UV spectrum analysis show that the composite's range of light absorption expanded due to the modification of Ti metal–organic framework. Furthermore, the results of photocurrent and electrical impedance indicate the compound has a better ability to generate and transfer electrons . The increase in the compound's NO removal efficiency (up to 63%) indicates that MOF has a positive effect on C v -C 3 N 4 modification—a good method for photocatalysis . Moreover, the compound can promote photocatalysis in a favorable direction.
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2021
·
IF 4.539
Weifeng Li,Tao Zhang,Li Lv,Yanxiao Chen,Wenxiang Tang,Shengwei Tang
A novel strategy of room-temperature synthesis of MIL-100(Fe) with organic amine as deprotonating agent was proposed. The as-prepared solid product was denoted as R-MIL-100(Fe). The material was systematically characterized via XRD , FT-IR, XPS and SEM. The effects of operation parameters such as initial fluoride concentration, reaction time, initial pH and co-existing anions on the fluoride adsorption performance of the synthesized R-MIL-100(Fe) were studied. The maximum fluoride adsorption capacity of R-MIL-100(Fe) was as high as 23.53 mg/g at 298 K in the fluoride solution. The results indicate that the adsorption process of fluorine on R-MIL-100(Fe) belongs to surface adsorption and intraparticle diffusion . An excellent fluoride adsorption performance of R-MIL-100(Fe) was observed in a wide pH range of 4–10. The co-existing anions including Cl - , NO 3 - and SO 4 2- almost had no negative effects on the adsorption performance of R-MIL-100(Fe). However, the present of CO 3 2- or HCO 3 - brought an obvious reduction of F - adsorption capacity of R-MIL-100(Fe). Thermodynamic study results illustrate that the adsorption process was an exothermic chemisorption . Chemical combination of iron and fluorine was confirmed by FT-IR and XPS. The strong combination brings the excellent F - adsorption performance of MIL-100(Fe). R-MIL-100(Fe) was successfully regenerated and recycled five cycles with an excellent regeneration ability and recyclability.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2015
·
IF 4.321
Tongtong Han,Yuanlong Xiao,Minman Tong,Hongliang Huang,Dahuan Liu,Luyan Wang,Chongli Zhong
A series of CNT@MIL-68(Al) composites with different carbon nanotubes (CNTs) loadings have been synthesized and characterized by SEM, TEM, PXRD, FT-IR, TGA, and N 2 adsorption. As evidenced from SEM and TEM images, the incorporation of CNTs can result in better dispersity of MIL-68(Al) in composites and smaller particle size than pure MIL-68(Al). Adding appropriate amounts of CNTs increases both the BET surface areas and the total volume of small micorpores (<16 Å), leading to largely improved performance of adsorptive removal of phenol from aqueous solution. In the industrial concentration range of phenol, the adsorption capacity of 0.75% CNT@MIL-68(Al) was improved up to 188.7% compared with the pristine MIL-68(Al), possibly due to the increase of small micropores introduced by the incorporation of CNTs. Regeneration experiments demonstrated that the composites are stable with good regenerability for at least five cycles. This work shows that the composites formed by the combination of CNTs and MOFs may find promising applications in liquid phase adsorption.
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
POLYHEDRON
·
2019
·
IF 2.284
Ning Tian,Yifang Dai,Qing Liu,Wei Dai
A general synthetic strategy for HS-Fe 3 O 4 @MIL-53(Al) adsorbent has been developed in this work. The composite material exhibits an efficient capture performance for rubidium ion due to sulfhydryl group and magnetic Fe 3 O 4 doped in its porous cavity. The results of X-ray diffraction, scanning electron microscopy, Fourier transform infrared spectroscopy, and N 2 adsorption–desorption proved that the HS-Fe 3 O 4 was immobilized in the composite material. High Rb + uptake capacity over the HS-Fe 3 O 4 @MIL-53(Al) is attributed to the exchange of acidic protons between the sulfhydryl group and the Rb + . The pseudo-second-order and Freundlich model could make a good description of the adsorption process. The Rb + sorption selectivity was moderately influenced by any co-ions effect (K + , Na + and Cs + ) due to HS-Fe 3 O 4 doped. These results reveal that our novel composite material might be a promising industrial adsorbent for Rb + capture.
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
LANGMUIR
·
2022
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IF 4.331
Zhiliang Jin,Xiaohong Li,Teng Li,Youji Li
Graphdiyne (g-CnH2n–2) is a new carbon material composed of sp and sp2 hybrid carbon atoms. Since the synthesis by Li’s team, graphdiyne has been widely studied in other fields because of its excellent properties. In this paper, graphdiyne was synthesized from copper-containing materials and the composite GDY/CuI/MIL-53(Al) S-scheme heterojunction is prepared for photocatalytic cracking of water to produce hydrogen. First, GDY/CuI was prepared by organic synthesis, and then GDY/CuI was anchored on the surface of MIL-53(Al) by in situ ultrasonic stirring. After the continuous optimization of experimental conditions, the final hydrogen evolution rate is much higher than that of MIL-53(Al). This efficient photocatalytic performance can be attributed to the S-scheme heterojunction formed by the unique energy band arrangement. At the same time, the mechanism of charge transfer was demonstrated by in situ irradiation X-ray photoelectron spectroscopy. The strong interaction among the three strongly promotes the separation and transfer of photogenerated electron–hole pairs.
研究领域:
材料科学
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能源化学
·
光催化技术
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2021
·Vol. 32
·期 2
·1778-1786
·
IF 2.478
Ding Ling,Zeng Min,Wang Huan,Jiang XiaoBing
In the present study, to broaden the application of metal–organic framework (MOF) materials in electronic functional materials, a simple solvothermal method was adopted to introduce bimetals, and metal–organic framework compounds (MIL-101 (Fe), MIL-101 (Fe, Co), MIL-101 (Fe, Cu)) acted as the templates. The hollow structures of Fe 2 O 3 , CoFe 2 O 4 , and CuFe 2 O 4 were formed through the simple calcinations at 600 °C for 3 h in Ar atmosphere. When the mentioned materials exhibiting hollow structures were tested as the negative electrode of a lithium-ion battery, introducing bimetals was reported to be able to improve their electrochemical performance. For instance, CoFe 2 O 4 and CuFe 2 O 4 were cycled 300 times under a high current density of 1000 mA/g, and the reversible capacity remained to be 978 mAh/g and 774 mAh/g. When 200 cycles were performed under a current density of 200 mA/g, these materials exhibited high specific capacities of 1118 mAh/g and 1155 mAh/g.
研究领域:
材料科学
·
电化学
·
能源存储
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DOI
高影响因子
Molecular Catalysis
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2022
·
IF 5.089
Rongzhao Li,Chengtao Zhang,Shuo Li,Yupeng Du
Propane dehydrogenation is commonly operated at temperatures exceeding 600 °C due to thermodynamic requirements. However, high temperature accelerates the deactivation of catalysts because of the coke deposition. Therefore, it is quite necessary to develop catalysts with high catalytic activity and improved anti-coking ability. To this end, an Al-doped Cr 2 O 3 catalyst derived from MIL-101(Cr/Al) is prepared in this work. The preparation conditions, including the carbonization temperature of MIL-101 and the proportion of Cr/Al, are optimized via experimental studies. Meanwhile, the adsorption and dehydrogenation behaviors of propane on the catalyst are investigated using Density Functional Theory (DFT) methods. Findings indicate that the optimum carbonization temperature and Cr/Al proportion are 900 °C and 6:4, respectively. Under the reaction condition of P = 0.1 MPa, T = 580 °C and GHSV = 800 h −1 , the propane conversion and propylene selectivity on the Cr 6 /Al 4 catalyst are 19.5% and 92.0%, respectively. The activity stability of the Al-doped Cr 2 O 3 is elongated significantly due to the lower desorption energy of propene and higher energy barrier for the coke formation on the catalyst. In sum, the present work completed via experiments and DFT calculations will lead to a better understanding of the Al-doped Cr 2 O 3 catalyst and guide the rational design of anti-coking catalysts for propane dehydrogenation.
研究领域:
化学工程
·
催化材料
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Hui Chen,Wengao Zeng,Yutang Liu,Wanyue Dong,Tao Cai,Lin Tang,Juan Li,Wenlu Li
It is important to find an effective way to enhance the photocatalytic efficiency of metal–organic frameworks. In this work, an organic supermolecule perylene diimide (PDI) semiconductor with a carboxyl terminal was added into the synthesis process of MIL-53(Fe) crystals. The PDI/MIL-53(Fe) (PM) composite photocatalyst was first obtained. The TC-H photodegradation rate of the most efficient 5PM was nearly 94.08% within 30 min, whose apparent reaction rate constant (k) is 4 times that of PDI and 33 times that of MIL-53(Fe), respectively. By investigation and characterization, it has been found that PDI nanofibers were dispersed and fixed in MIL-53(Fe) and bonded to each other by covalent bonds. The radical trap experiments and electron spin resonance analysis illustrated that hydroxyl radical (·OH), superoxide radical (·O2–), and photogenerated holes (h+) were active species. Combined with the band structure of PDI and MIL-53(Fe), it is proposed that the PM photocatalyst was a Z-scheme heterojunction mechanism. Therefore, PM photocatalysts showed excellent charge separation and transfer ability. The performance improvement of 5PM is due to enhanced visible light absorption, efficient charge separation, and excellent redox potential. Five cyclic photocatalytic tests and experiments further demonstrate that the 5PM photocatalyst has a promising future for pollutant removal.
研究领域:
材料科学
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环境科学
·
化学
✓ 已验证
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Bolun Yu,Jun Chen,Quanzhang Liu,Shuoyang Li,Xiaohang Zhang,Bowen Liang,Zuhong Lin,Haipu Li,Jingjing Yao
The use of metal–organic framework-derived materials for removing micropollutants from water is increasing, but precise composition control remains a challenge. In this study, 14 MIL-100(Fe)-derived materials were synthesized to adsorb and remove antipyrine (ANT) from water by optimizing the heating rate, pyrolysis temperature, and activation methods. The adsorbents demonstrated excellent ANT removal performance across a pH range of 3 to 11, as well as in complex water bodies. They also exhibited easy recovery and outstanding regeneration capabilities. Under the optimized conditions (i.e., ANT content: 10 mg/L, M-600–2 dosage: 0.1 g/L, and pH: 7), M-600-10 displayed the highest adsorption capacity (23.10 mg/g for ANT) while MIL-100(Fe) had limited adsorption capability (2.56 mg/g for ANT). The adsorption process was exothermic and spontaneous, influenced by both membrane diffusion and intraparticle diffusion, and followed the Freundlich and pseudo-second-order models. Despite variations in surface areas (75.70–261.91 m2/g), total pore volumes (0.2019–0.5984 cm3/g), and average pore sizes (7.47–13.99 nm), there was no strong linear relationship with adsorption capacity (7.47–15.99 mg/g). The major components, including Fe/pyrrolic N-doped graphene (PING), Fe3C/PING, Fe3O4/PING, and PING, had calculated adsorption energies of −0.94, −2.16, −0.79, and −2.24 eV, respectively, which correlated positively with Bader charge transfer numbers. The adsorbents relied on van der Waals forces for ANT adsorption, with PING exhibiting the strongest interactions and Fe3O4/PING exhibiting the weakest. These findings enhance the theoretical understanding of derived materials and expand their application in water purification.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）