RSC Advances
·
2015
·Vol. 6
·期 5
·3671-3679
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IF 3.84
Aoning Wang,Yingjie Zhou,Zhoulu Wang,Miao Chen,Luyi Sun,Xiang Liu
A UiO-66-type metal–organic framework (MOF) fabricated with titanium was successfully prepared via a facial modified post-grafting method. The as-prepared samples were characterized by X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), ultraviolet-visible adsorption spectroscopy (UV-vis), and photoluminescence spectroscopy (PL) techniques. The introduction of titanium enhanced the optical properties of UiO-66 via the formation of oxo-bridged hetero-Zr–Ti clusters, but led to a sacrifice in crystallinity. The removal of methylene blue (MB) over these samples could be attributed to the dual function of the adsorption and photo-degradation mechanisms. The highest MB removal efficiency of 87.1% was achieved over UiO-66(1.25Ti) under simulated sun-light irradiation.
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
Nanomaterials
·
2021
·Vol. 11
·期 10
·2488
·
IF 5.076
Jian Gao,Ziming Li,Ziqi Deng,Meihua Liu,Wei Wei,Chunbai Zheng,Yifan Zhang,Shusen Chen,Pengyang Deng
Mercury is one of the most toxic heavy metals that can cause terrible disease for human beings. Among different absorption materials, MOF (metal–organic framework) materials show potential as very attractive materials for the rapid removal of mercury. However, the instability and difficulty for regeneration of MOF crystals limit their applications. Here, a continuous sulfur-modified MOF (UiO-66-NHC(S)NHMe) layer was synthesized in situ on polymeric membranes (PP non-woven fabrics) by post-synthetic modification and used for rapid mercury removal. The MOF-based membrane (US-N) showed high selectivity for mercury in different aqueous systems, which is better than sulfur-modified MOF powders. A thinner MOF layer on US-N showed a much better mercury ion removal performance. US-N with a 59.3 nm MOF layer could remove more than 85% of mercury in 20 min from an aqueous solution. In addition, the US-N can simply regenerate several times for mercury removal and maintain the initial performance (removal ratio > 98%), exhibiting excellent durability and stability. This work promotes the application of MOF materials in the rapid removal of hazardous heavy metal ions from practical environments.Keywords:metal–organic frameworks;membrane;mercury removal;rapid;regenerable
研究领域:
环境科学
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材料科学
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DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2022
·
IF 9.221
Kun Yu,Guangyao Zhang,Huining Chai,Lijun Qu,Dan Shan,Xueji Zhang
Metal−organic frameworks (MOFs) have emerged as promising materials for smart sensing and imaging applications. Here, a novel micron-biscuit Mn(III)-based porphyrinic MOF is synthesized with the modulation of 4,4′-biphenyldicarboxylic acid (BPDC). The anisotropic growth of MOF is induced by the increased steric hindrance , yielding micron-biscuit Mn-TCPP(BPDC) MOF crystals. Mn(III), as a sealer, quenched the intrinsic fluorescence of porphyrin because of the ligand-to-metal charge transfer (LMCT) effect, and this disappeared fluorescence can be regularly restored and enhanced due to LMCT effect inhibition and release of free porphyrin derived from the water-induced two-stage ligand exchange (TSLE) between BPDC, porphyrin and water. The as-prepared MOF acts as an excellent “signal-on” luminescent water-sensing probe with low amount (2.5 μg/mL) that can efficiently realize the trace detection of water in various organic media with high sensitivity, especially in dimethyl sulfoxide (DMSO), the detection limit is as low as 0.04% (v/v). Moreover, Mn-TCPP(BPDC) was successfully used for sensing water content in real commercial samples. This MOF with the guest-induced TSLE not only provides inspiration for the design of new luminescent materials, but also widens the path for smart sensing.
研究领域:
材料科学
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化学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
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2022
·Vol. 23
·期 24
·16121
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IF 6.208
Zhenghua Zhao,Mingjie Liu,Kai Zhou,Hantao Gong,Yajing Shen,Zongbi Bao,Qiwei Yang,Qilong Ren,Zhiguo Zhang
Heterogeneous Brønsted acidic catalysts such as phosphoric acids are the conventional activators for organic transformations. However, the photocatalytic performance of these catalysts is still rarely explored. Herein, a novel Zr-based metal−organic frameworkZr-MOF-Pwith phosphoric acids as a heterogeneous photocatalyst has been fabricated, which shows high selectivity and reactivity towards the photo-oxidation of sulfides under white light illumination. A mechanism study indicates that the selective oxygenation of sulfides occurs with triplet oxygen rather than common reactive oxygen species (ROS). WhenZr-MOF-Pis irradiated, the hydroxyl group of phosphoric acid is converted into oxygen radical, which takes an electron from the sulfides, and then the activated substrates react with the triplet oxygen to form sulfoxides, avoiding the destruction of the catalysts and endowing the reaction with high substrate compatibility and fine recyclability.Keywords:metal−organic frameworks;phosphoric acid;photo-oxidation;oxygen radical
研究领域:
化学
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材料科学
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DOI
PubMed
高影响因子
Materials
·
2023
·Vol. 16
·期 18
·6212
·
IF 3.4
Wenjie Tan,Rui Xin,Jiarui Zhang,Lilin Yang,Min Jing,Fukun Ma,Jie Yang
Given the serious harm of toxic phenol to human health and the ecological environment, it is urgent to develop an efficient, low-cost and sensitive nanoenzyme-based method to monitor phenol. MOF-derived nanozyme has attracted wide interest due to its hollow polyhedra structure and porous micro-nano frameworks. However, it is still a great challenge to synthesize MOF-derived multimetal synergistic catalytic nanoenzymes in large quantities with low cost. Herein, we reported the synthetic strategy of porous hollow CA-CoNiMn-CLDHs with ZIF-67 as templates through a facile solvothermal reaction. The prepared trimetallic catalyst exhibits excellent peroxidase-like activity to trigger the oxidative coupling reaction of 4-AAP and phenol in the presence of H2O2. The visual detection platform for phenol based on CA-CoNiMn-CLDHs is constructed, and satisfactory results are obtained. The Kmvalue for CA-CoNiMn-CLDHs (0.21 mM) is lower than that of HRP (0.43 mM) with TMB as the chromogenic substrate. Because of the synergistic effect of peroxidase-like activity and citric acid functionalization, the built colorimetric sensor displayed a good linear response to phenol from 1 to 100 μM with a detection limit of 0.163 μM (3σ/slope). Additionally, the CA-CoNiMn-CLDHs-based visual detection platform possesses high-chemical stability and excellent reusability, which can greatly improve economic benefits in practical applications.Keywords:metal organic framework;nanozyme;colorimetric detection;phenol
研究领域:
生物化学
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环境科学
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DOI
PubMed
高影响因子
DALTON TRANSACTIONS
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2025
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IF 3.3
Xuan Yang,Zesen Yu,Hedong Jiang,Huanhuan Guo,Jian Sun,Jiake Li,Hua Zhu,Yanxiang Wang,Pingchun Guo
Metal–organic frameworks (MOFs) are promising candidates for thermochromic materials. In this study, a hydrogen-bonded 3D porous metal–organic framework, Co-BTC (Co3(BTC)2·12H2O, BTC = 1,3,5-benzenetricarboxylate), exhibited a pink color at room temperature, attributed to the d–d transition of Co2+ ions within the framework, and displayed reversible thermochromic behavior due to alterations in the coordination environment of Co2+ ions. Additionally, Co-BTC/PVB thermochromic film was successfully designed and fabricated as a smart window with a monolayer structure. The window exhibited reversible thermochromic behavior comparable to Co-BTC, with visible transmittance modulation of 10.73%, near-infrared transmittance modulation of 25.87%, and solar transmittance modulation of 12.63%. Compared to a pure PVB window, the smart window reduced indoor temperatures by 5.7 °C in field tests, indicating a significant energy-saving effect. This research presents a potential application for the rational design of MOFs in the development of advanced smart windows.
研究领域:
材料科学
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能源工程
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建筑技术
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DOI
PubMed
高影响因子
MOLECULES
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2023
·Vol. 28
·期 2
·877
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IF 4.6
Xuan Chen,Siyu Fang,Ping Xue,Jiming Huang,Mi Tang,Zhengbang Wang
The development of tunable molecule separation membranes requires materials with remote controllability and ultra-high separation capability. In this paper, a novel photoswitchable metal organic framework (MOF) thin film (Cu2(AzoBPDC)2) was prepared by liquid phase epitaxial layer-by-layer assembly to realize the reversible remote-controlled switching. The azobenzene side groups in the Cu2(AzoBPDC)2thin film showed excellent reversible photoswitching performance under UV (365 nm) and Vis (450 nm) irradiation, achieving the remote-controlled mode of the diffusion flux of polar gas molecules in the MOF thin film.Keywords:metal–organic frameworks;azobenzene;photoswitchable;gas separation
研究领域:
材料科学
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化学工程
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光化学
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DOI
PubMed
高影响因子
COMBUSTION AND FLAME
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2025
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IF 6.2
Kang Xue,Huaiyu Li,Lun Pan,Chongjun Li,Minhua Ai,Chengxiang Shi,Xiangwen Zhang,Ji-Jun Zou
Boron is considered as one of the most promising high energy additives to improve the energy density of aerospace propellants and energetic materials. However, the low energy release properties restrict its practical applications. Herein, three kinds of boron-based composite energetic particles (nB@MOF) were prepared by encapsulating nano boron (nB) in metal-organic frameworks (MOFs) by a self-assembly method with Zn, Co and Mo as metal nodes, and 2-methylimidazole and ethylenediamine as organic ligands. The characterization and dynamics results show that the combustion of organic ligands can induce micro-explosion to destroy the surface oxidation layer of agglomeration and promote the oxidation efficiency of boron. Furthermore, the metal oxide catalyst generated in-situ on nB surface by metal nodes can reduce the initial oxidation temperature and improve the mass transfer distance and interface contact of the oxidation reaction. Compared with nB, the maximum pressurization rate of nB@MOF with 2-methylimidazole as the organic ligand is increased by 31.1 times, the initial oxidation temperature of nB@MOF with Mo as the metal node is reduced by 185.9°C, and the combustion heat of all nB@MOF are increased by more than 1.2 times. This work demonstrates that the energy release properties of boron can be effectively improved by synergistic effect of micro-explosion process and interfacial catalysis.
研究领域:
材料科学
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能源化学
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DOI
高影响因子
MOLECULES
·
2024
·Vol. 29
·期 8
·1721
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IF 4.2
Shoudong Wang,Lei Zhou,Hongyun Qin,Zixu Dong,Haoyuan Li,Bo Liu,Zhilu Wang,Lina Zhang,Qiang Fu,Xia Chen
Hydrofluorocarbons (HFCs) have important applications in different industries; however, they are environmentally unfriendly due to their high global warming potential (GWP). Hence, reclamation of used hydrofluorocarbons via energy-efficient adsorption-based separation will greatly contribute to reducing their impact on the environment. In particular, the separation of azeotropic refrigerants remains challenging, such as typical mixtures of CH2F2(HFC-23) and CHF3(HFC-32), due to a lack of adsorptive mechanisms. Metal–organic frameworks (MOFs) can provide a promising solution for the separation of CHF3–CH2F2mixtures. In this study, the adsorption mechanism of CHF3–CH2F2mixtures in TIFSIX-2-Cu-i was revealed at the microscopic level by combining static pure-component adsorption experiments, molecular simulations, and density-functional theory (DFT) calculations. The adsorption separation selectivity of CH2F2/CHF3in TIFSIX-2-Cu-i is 3.17 at 3 bar under 308 K. The existence of similar TiF62−binding sites for CH2F2or CHF3was revealed in TIFSIX-2-Cu-i. Interactions between the fluorine atom of the framework and the hydrogen atom of the guest molecule were found to be responsible for determining the high adsorption separation selectivity of CH2F2/CHF3. This exploration is important for the design of highly selective adsorbents for the separation of azeotropic refrigerants.
研究领域:
材料科学
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环境科学
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化学工程
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DOI
PubMed
高影响因子
FARADAY DISCUSSIONS
·
2017
·Vol. 201
·63-70
·
IF 3.588
Nian Zhao,Ping Li,Xin Mu,Chuanfang Liu,Fuxing Sun,Guangshan Zhu
A novel ultra-stable metal–organic framework, MCIF-1, [Cu2(DCI)2](MeCN), based on dicyanoimidazole and Cu(I), has been synthesized at room temperature successfully. MCIF-1 shows excellent water stability and can retain crystallinity after soaking in water for about one week. In addition, MCIF-1 also shows exceptional resistance under both acidic and basic conditions within a large pH range from 0 to 13.5. What is more, after modifying the synthesis procedure slightly, we can produce this material in a large scale during a very short time. Mild synthesis conditions, excellent stability and ease of large scale production give MCIF-1 great potential for practical use.
研究领域:
材料科学
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无机化学
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纳米技术
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DOI
高影响因子
JOURNAL OF MATERIALS CHEMISTRY
·
2012
·Vol. 22
·期 34
·17833-17841
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IF 5.968
Cheng-Xiong Yang,Xiu-Ping Yan
The adsorption and extraction of fullerenes on the metal–organic framework MIL-101(Cr) were studied in detail in terms of kinetics, thermodynamics, adsorption isotherms, competitive adsorption, and breakthrough curves. The adsorption of C60 and C70 on MIL-101(Cr) follows a pseudo-second-order kinetic model. The adsorption rate constant for C70 is 3 to 5 times that for C60, showing faster and easier adsorption of C70 over C60 on MIL-101(Cr). Intraparticle diffusion model analysis reveals that the adsorption of C60 and C70 on MIL-101(Cr) proceeds by two phases, surface sorption and intraparticle/pore diffusion. The adsorption of fullerenes on MIL-101(Cr) is controlled by entropy changes. The maximum adsorption capacity for C70 at 30 °C (198.4 mg g−1) is 29 times that for C60 (6.76 mg g−1). MIL-101(Cr) shows much more favorable adsorption of C70 and higher fullerenes than C60 with a high selectivity (αC70/C60 = 24). Selective extraction of C70 and higher fullerenes from crude carbon soot can be easily achieved on MIL-101(Cr) via a simple adsorption–desorption process. The used MIL-101(Cr) can be regenerated by washing with o-dichlorobenzene under ultrasonication. The high selectivity, fast adsorption, easy desorption, and excellent reusability makes MIL-101(Cr) attractive as a novel adsorbent for the enrichment and extraction of C70 and higher fullerenes.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2018
·
IF 3.141
Yongwei Chen,Houxiao Wu,Daofei Lv,Renfeng Shi,Yang Chen,Qibin Xia,Zhong Li
In the petrochemical industry, ethane/ethylene (C2H6/C2H4) separation is one of the most important processes. Herein, we reported an iron-based metal–organic framework MIL-142A for efficiently trapping C2H6 from C2H6/C2H4 mixture, exhibiting preferential adsorption of C2H6 over C2H4. After various characterization techniques to confirm the successful preparation of MIL-142A, the C2H6 and C2H4 adsorptive separation performance was systematically investigated. Results showed that MIL-142A had remarkably higher C2H6 adsorption capacities than that of C2H4 at 298, 288, and 278 K, such as C2H6 and C2H4 adsorption capacities of 3.8 and 2.9 mmol/g at 298 K and 100 kPa, respectively. In addition, the C2H6 and C2H4 adsorption heats were relatively low and in the corresponding ranges 27.3–25.1 and 26.2–23.8 kJ/mol, which is a favorable property for the regeneration of MIL-142A with less energy penalty. Furthermore, it was inferred that the difference between the adsorption heat for C2H6 and C2H4 with the MIL-142A framework governed the selective adsorption of C2H6 over C2H4. The ideal adsorbed solution theory (IAST) selectivity of C2H6/C2H4 was high up to 5.8 in the initial low pressure and then decreased to 1.5 at 298 K and 100 kPa. Besides, breakthrough experiments also corroborated its efficient separation of C2H6/C2H4 mixture. Additionally, MIL-142A had excellent moisture stability, and its framework remained still intact after being exposed to humid conditions (80% RH) for 15 days. These comprehensive properties demonstrated that this unique material MIL-142A, as a high-performance C2H6-selective adsorbent, can be potentially used for highly adsorptive separation of the C2H6/C2H4 mixture.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
危险品化学品经营许可证（带存储）