COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2021
·
IF 4.539
Yinchun Hu,Hui Yang,Renhu Wang,Menglan Duan
MOF-5 was prepared by hydrothermal method and Ag@MOF-5 nanoplates were obtained to improve the antibacterial activity and dispersion of Ag nanoparticles . MOF-5 and Ag@MOF-5 were characterized by scanning electron microscope (SEM), high-resolution transmission electron microscope and energy spectrum (HR-TEM&EDS), X-ray diffraction (XRD), infrared spectrum (FTIR) and thermal gravimetric analysis (TGA). MOF-5 was flaky crystals accumulated and complexed to form cube-like crystalline particles with the size of 20–50 micrometers, and it was destroyed in the process of loading nano-silver particles. Ag@MOF-5 nanoplates were nanoscale sheets, and 3–5 nm Ag nanoparticles were uniformly dispersed and loaded on nanoplates of MOF-5. The content of silver nanoparticles reached 13 wt% of Ag@MOF-5 total weight. The results of antibacterial experiment indicated that antibacterial ability of MOF-5 was limited, while Ag@MOF-5 showed good antibacterial ability to Escherichia coli and Staphylococcus aureus.
研究领域:
材料科学
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微生物学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2019
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IF 6.393
Lan Guo,Yuan Liu,Rongmei Kong,Guang Chen,Hao Wang,Xiuli Wang,Lian Xia,Fengli Qu
β-Glucuronidase (β-GCU) is closely related to the occurrence of multiple diseases, and it has been applied as a biomarker and therapeutic target in clinical diagnosis. However, reliable methods with high selectivity and sensitivity for monitoring β-GCU are still lacked. Herein, we designed a novel fluorescent nanoprobe, rhodamine B encapsulated MOF-5 (RhB@MOF-5) for the first time, to detect β-GCU through the synergistic effect of inner filter effect (IFE) and static quenching effect (SQE) by employing 4-nitrophenyl-β-D-glucuronide (PNPG) as the substrate. After encapsulating into MOF-5, the fluorescence emission of RhB at 550 nm excited by 320 nm was greatly enhanced. The major overlap between the fluorescence excitation spectrum of RhB@MOF-5 (about 320 nm) and the ultraviolet absorption spectrum of PNPG (about 310 nm) lead to PNPG being a good IFE absorber in this sensing system. Under the optimized conditions, the excitation spectrum of the RhB@MOF-5 could be absorbed by PNPG, resulting in the dramatically decrease of fluorescence emission. After adding β-GCU into the system, the substrate of PNPG would be enzymatic hydrolyzed to p -nitrophenol (PNP) and glucose, then the IFE disappearance and the fluorescence recovered. The current sensing platform was interference-free and exhibited a broad linearity relationship for β-GCU range of 0.1–10 U L −1 (R 2 = 0.9957) with a limit of detection as low as 0.03 U L −1 , which was reduced by more than one orders compared with the reported methods. Moreover, the encapsulation of dyes using porous nanoparticles to achieve some tailor-made characteristics will enrich experimental design inspiration.
研究领域:
生物化学
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医学诊断
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材料科学
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2021
·Vol. 32
·期 14
·19284-19296
·
IF 2.478
Li Sirui,Zhao Hongwei,Wang He,Zhu Hang,Zhang Hehan,Yu Haitao,Yang Tianye
At present, functional materials such as metal sulfides, metal oxides and so on synthesized with metal–organic frameworks (MOFs) as the general templates or precursors in the field of gas sensing have been a new strategy to improve gas-sensing performance. In this work, a unique MOF-5-derived ZnO nanochains (NCs) sample is synthesized through a conventional solvothermal method with subsequent annealing process. The ZnO NCs-based sensor exhibits outstanding sensing performance such as fast response time (< 1 s) and high response value 34.7 toward 20 ppm triethylamine (TEA). The ZnO NCs sample was characterized by a series of methods (XRD, SEM, XPS and so on). The excellent TEA-sensing properties can be ascribed to the unique nanochain morphology and a plenty of oxygen vacancies of the ZnO crystal through the analysis of the morphology and composition of the sample. In addition, a possible growth mechanism comes up and the sensing mechanism is discussed. The superior TEA sensing performance makes the as-synthesized MOF-5 derived ZnO NCs sample a potential candidate for TEA fast detection.
研究领域:
材料科学
·
化学传感器
·
纳米材料合成
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DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
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2021
·
IF 5.455
Xiangtao Qin,Taotao Qiang,Lu Chen,Shaoting Wang
MOF-5 is an emerging semiconductor material with a great potential in photocatalytic wastewater treatment . However, its inherent deficiencies, such as the narrow range of photo-response, the fast recombination of photoinduced carriers and the unstable structure, largely limit its further application. In this work, super biocompatible N-doped carbon quantum dots (N-CQD) derived from the green precursor, coconut shells, were in situ grown on MOF-5 via a facile solvothermal method to construction of 0D/3D N-CQD/MOF-5 photocatalyst with an enhanced photoreduction ability. A sustainable and pollution-free preparation process of N-CQD/MOF-5 photocatalyst was delivered and biomass waste resource was effectively utilized via this method. This well-designed photocatalyst with the optimized 1% N-CQD loading presented a considerable photoreduction rate of Cr (VI), which was 2.5 times higher that of pure MOF-5. It also possessed a strong structural stability and reusability even after multiple tests. The boosting photocatalysis activity could be attributed to the doping of N-CQD, who not only act as an electron acceptor to separate the photoexcited electrons and holes effectively, but also play a vital role as a photosensitizer to improve the visible-light absorption. Furthermore, the influence of activation methods on the photocatalytic activity of MOF-5 were also investigated theoretically. For the purpose of clarifying the potentially photocatalytic mechanism of N-CQD/MOF-5 in photoreduction Cr (VI), a series of tests involving photoelectrical characterizations and fluorescence spectroscopy were executed. Therefore, this study provides an innovative photocatalytic system for an enhanced photoreduction performance of Cr (VI) of MOF-5.
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
REACTIVE & FUNCTIONAL POLYMERS
·
2024
·
IF 4.5
Linlin Yu,Ruoyu Chen,Qian Jia
Oily wastewater, especially oil-water emulsions, has caused severe environmental damage. It is urgent to develop a simple, efficient superhydrophobic and superoleophilic material to address this issue. In this work, a multifunctional sponge based on MOF was proposed. The hydroxy-assisted method was employed to prepare MOF-5 with metal coordination centers. Subsequently, octadecylphosphonic acid (OPA) was used to hydrophobically modify MOF-5 to prepare stable and hydrophobic OPA-MOF-5. Polydimethylsiloxane (PDMS) with low surface energy was employed as the adhesive, and the hydrophobic OPA-MOF-5 was loaded onto the polyurethane (PU) sponge to obtain the stable superhydrophobic OPA-MOF-5@PDMS@PU with a WCA of 155.9°. The produced modified sponge exhibited high sorption capacity and oil-water separation efficiency, with a sorption capacity of 26.7 (petroleum ether)-85.6 (chloroform) g/g and a separation efficiency of over 99 %. It has also shown satisfactory emulsion purification and flame retardancy capacities.
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
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Xianlu Lu,Dongdong Zhang,Jiang Zhong,Lin Wang,Lan Jiang,Qiao Liu,Gang Shao,Dingfa Fu,Jie Teng,Weiyou Yang
Among the families of modern energy storage devices, the potassium-ion batteries (PIBs) are emerging as a shining star with desired high energy density and interesting commercial application prospect. However, they still encounter the big question with intrinsically bad cycle stability, especially under high-temperature working conditions. In this work, we report the progress on exploring high-temperature PIBs with ultrahigh stability, based on metal organic framework-5 (MOF-5) as anode materials. At the fixed working temperature of 62.5 °C, the as-constructed PIBs have initial discharge and charge specific capacities of respective ∼ 1183 and 210 mA h g −1 at a current density of 200 mA g −1 , and hold a specific capacity of 160 mA h g −1 with a low decay of 0.15% per cycle over 150 cycles. Even at a high current density of 500 mA g −1 , they deliver a reversible specific capacity of 56 mA h g −1 with a tiny decay of 0.018% per cycle over 3000 cycles, which is the state-of-the-art one among those of high-temperature PIBs ever reported. The energy storage mechanism based on C O bond as the redox center is proposed.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
高影响因子
ACS Applied Polymer Materials
·
2024
·
IF 4.4
Linlin Yu,Jiawei Ji,Ruoyu Chen,Qian Jia
Frequent oil spill incidents and increasing amounts of industrial wastewater pose a serious threat to the environment. The use of superhydrophobic materials to separate oil/water mixtures has attracted widespread attention. In this work, a superhydrophobic sponge based on MOF-5 was prepared to achieve efficient continuous oil–water separation and emulsion purification. HDTMS-MOF-5@PDA@MS (H-MOF-5@PDA@MS) not only exhibited superhydrophobic property (WCA = 153.8°, SA = 6.5°) but also exhibited excellent saturated adsorption capacity, with an oil adsorption capacity of 66 (petroleum ether)-168 (chloroform) g/g and oil–water separation efficiency of 99.2%. It also demonstrated efficient performance in various emulsion purification processes. Furthermore, it maintained a stable superhydrophobicity in some extreme environments. H-MOF-5@PDA@MS is expected to have wide application perspective in the fields of environmental pollution control and wastewater treatment due to its low cost, simple process, excellent oil–water separation efficiency, reusability, and environmental friendliness.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2018
·
IF 3.057
Chao Xia,Caiyan Yu,Mengmeng Cao,Jinfeng Xia,Danyu Jiang,Guohong Zhou,Dafeng Zhang,Huili Li
In this work, a new Eu and Tb co-doped luminescent compound based on MOF-5, [Zn 4 O(BDC) 3 ], (named as compound 1 ) was successfully synthesized. The structure and morphology characterizations demonstrate that the initial framework of MOF-5 is retained well after co-doping Eu and Tb. The systematic investigations of photoluminescence behaviors reveal that the heat-treated compound 1 (called as compound 1a ) can be utilized as a multi-channel readout luminescent thermometer in emission intensity ratio, decay time ratio, and luminescence color. It simultaneously exhibits the excellent repetitiveness and reversibility under high temperature region from 303 to 473 K. The relative sensitivity of 1.8%/K at 473 K is much higher than the best one of 1.19%/K previously reported for the mixed-lanthanide MOF Tb 0.8 Eu 0.2 BPDA. Until now, such a ratiometric luminescent thermometer with a high sensitivity at the temperature as high as 473 K has been rarely explored.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Z.W. Zhu,Q.R. Zheng
Comparisons were made between the samples mechanochemically (MOF-5(M)) and solvothermally (MOF-5(S)) prepared for the development of efficient hydrogen storage medium. Synthesized samples were undergone structural characterization as well as adsorption equilibrium measurements of hydrogen at temperature-pressure range 77 K–87 K and 0.1–10 MPa. Grand Canonical Monte Carlo (GCMC) simulations were further conducted to study the behaviors of hydrogen molecules adsorbed on MOF-5. It shows that, besides the advantage of large scale synthesis and a lower cost, mechanochemical method respectively brings about 207% and 90.5% increments in the specific surface area and the maximum excess adsorption capacity of hydrogen at 77 K within pressure range 0–10 MPa. Results also reveal that the crystal within MOF-5(M) is regular and distributing uniformly with a mean size only one tenth of that of the MOF-5(S); at 77 K within pressure range 0–10 MPa, Toth equation can predict the adsorption equilibrium data of hydrogen on two MOF-5 samples with a mean relative error less than 1.5%. It suggests that MOF-5(M) is more promising for hydrogen storage by adsorption for practical applications.
研究领域:
材料科学
·
能源研究
✓ 已验证
产品关联
DOI
高影响因子
SOLID STATE IONICS
·
2024
·
IF 3
Qin Zhou,Cong Xia,Ji Li,Amei Cheng,Jianwen Liu,Hongying Liu,Lin Li,Shiquan Wang
Metal-organic framework (MOF-5) material was synthesized by solvothermal method. Porous carbon (C) and sulfur-doped porous carbon (S/C) were fabricated by calcining and vulcanization of MOF-5. X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and Raman spectroscopy were used to characterize the crystal structure and morphology of the samples. The electrochemical performance of C and S/C materials were tested as anode materials for lithium ion batteries (LIBs) and sodium ion batteries (SIBs). The S/C exhibits the high reversible capacity (1114.8 mAh g −1 after 100 cycles at 0.1 A g −1 and 485 mAh g −1 after 500 cycles at 2.0 A g −1 ), as anode for LIBs. It behaves a reversible discharge capacity of 268.8 mAh g −1 after 100 cycles at 0.1 A g −1 and a capacity of 157 mAh g −1 after 1000 cycles at 2.0 A g −1 , as anode for SIBs. Compared with C, the electrochamical performance of S/C material is significantly improved. This is mainly because the bigger specific surface area and the doping of sulfur atoms increases the layer spacing and facilitates the kinetics of the intercalation and deintercalation of Li + and Na + ions, especially Na + ions.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
·
2023
·Vol. 25
·期 8
·1-11
·
IF 2.5
Dong Qi Zheng,Huang Xin Yi,Huang Cheng
A composite luminescent material consisting of perovskite quantum dots (PQDs) and MOF-5 using an in-situ growth method. The preparation of MOF-5 as a growth template was achieved via hydrothermal synthesis, with the addition of CTAB/TMB as a stencil agent to facilitate the formation of pores with an appropriate size. Subsequently, CsPbBr 3 QDs were grown in situ on the MOF under mechanical grinding conditions. The prepared CsPbBr 3 @MOF-5 composite materials were characterized by various analytical techniques including BET, XRD, PL, TEM, SEM, and EDS. The results revealed that the average size of PQDs was only 4.9 nm, and the corresponding emission peak exhibited a blue shift of 11 nm. The photoluminescence intensity (PL) of CsPbBr 3 @MOF-5 was increased by 71% compared to the unmodified sample, and photoluminescence quantum yield (PLQY) of solid powder increased to 48%. This is due to the fact that MOF-5 reduces the surface defects of quantum dots. Additionally, the Significantly improved PQDs stability after compounding MOF, both at room temperature and under thermal stress. These findings highlight the potential of this synthetic strategy as a means of preparing ultra-small composite light-emitting materials, with promising applications in LED and optoelectronic devices.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Yiyuan Peng,Mengbiao Liang,Ting Chen,Mengdi Zhao,Zhixiang Xie,Chunxian Guo
All-inorganic perovskite nanocrystals (CsPbX 3 NCs, X = Cl, Br, I) have emerged as promising candidates for applications in light-emitting diodes (LEDs), solar cells, photodetectors, and backlight displays, owing to their exceptional optoelectronic properties, including high photoluminescence quantum yield (PLQY), long carrier lifetimes, and narrow emission bandwidths. However, the intrinsic ionic nature of these nanocrystals renders them highly susceptible to environmental degradation, limiting their practical applications. Herein, we report the synthesis of CsPbBr 3 @MOF-5 composites through a physical mixing method: room-temperature supersaturated recrystallization of CsPbBr 3 NCs, followed by encapsulation within a hierarchical porous zinc-based metal-organic framework (MOF-5). By incorporating poly(ethylene oxide)-block-poly(propyleneoxide)-block-poly(ethylene oxide) Pluronic (P123) and 1,3,5-trimethylbenzene (TMB) as structure-directing agents, the pore architecture of MOF-5 was tailored to exhibit hierarchical porosity (2-35 nm), significantly enhancing both the PLQY and stability of CsPbBr 3 NCs. The CsPbBr 3 @MOF-5 composites achieved a remarkable PLQY improvement from 22% to 56%, retained 55% of their initial PL intensity after 60 days of ambient storage, and maintained 65% of PL emission under thermal stress (298-498 K). In contrast, pristine CsPbBr 3 NCs experienced complete quenching under identical conditions. Additionally, the composite exhibited superior resistance to anion exchange when combined with CsPbBr x I 3-x NCs. A white LED (WLED) device fabricated using CsPbBr 3 @MOF-5 composite and K 2 SiF 6 :Mn 2+ (KSF) red phosphor exhibited a luminous efficiency of 20.71 lm/W, a correlated color temperature (CCT) of 5486 K, and a broad color gamut covering 133.3% of the National Television Standards Committee (NTSC) standard, underscoring its potential for advanced lighting and display technologies.
研究领域:
材料科学
·
光学工程
✓ 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）