Molecular Catalysis
·
2024
·
IF 3.9
Yifei Chen,Xinnan Zhao,Chen Xin,Xiuqin Dong,Hao Gong
This work explored the role of defective sites on the hydroformylation of n-butene through ligand regulation. The investigation examined the effect of modulator properties on defect sites and rhodium loading, and optimized the H 2 BDC/modulator ratio to improve catalyst activity. Atomically dispersed Rh is anchored to these highly dispersed defect sites, effectively preventing aggregation and thereby enhancing hydrogenation ability. Under optimal conditions, the catalyst achieved a conversion of 96.9 %, with an overall aldehyde selectivity of 90 %. DRIFTS analysis provided compelling evidence that Rh(CO) 2 and HRhCO species were formed on 1Rh/MOF-5-HBC, improving CO insertion capability. This study highlights the significance of MOFs as catalyst supports in enhancing performance through defect engineering. The ability of the modulator to induce defect formation was measured by p K a. Meanwhile, it has been discovered that the length differences between the modulator and the MOF organic ligand can have a significant impact on the stability of defective MOFs.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Yuanyuan Fu,Yanfei Li,Rihui Zhou,Yuzhe Zhang,Shouhui Chen,Yonghai Song,Li Wang
A new route to load Co 3 O 4 nanoparticles (NPs) on MOF-5 (MOF-5 was composed of 1,4-benzenedicarboxylate (BDC) and Zn 2+ via coordination bond (Zn 4 O(BDC) 3 ·(DMF) 8 (C 6 H 5 Cl)), where MOF indicates metal-organic framework) derived hierarchically porous carbon (MDPC) was proposed. Various techniques including scanning electron microscopy, transmission electron microscopy , Raman spectroscopy , powder X-ray diffraction, X-ray photoelectron spectroscopy, thermogravimetric analysis and electrochemical methods were used to characterize the Co 3 O 4 NPs@MDPC. The results showed that the MDPC contained mesopores obtained by vaporizing ZnONPs and micropores came from MOF-5 self. Lots of nano-sized Co 3 O 4 NPs formed in MDPC's mesopores. The vast micropores of MDPC provided an effective channel for the transport of Li + when it was used as anode materials for lithium ion batteries (LIBs). The MDPC prevented Co 3 O 4 NPs from agglomerating effectively, which remained robust for superior rate capability during repeated lithiation/delithiation process. And the as-prepared Co 3 O 4 NPs@MDPC composites remained 94% reversible capacity from the second cycle. Furthermore, the as-prepared Co 3 O 4 NPs@MDPC anode manifested outstanding capability of 587.2 mA h g -1 at 2000 mA g −1 after 200 cycles, apparently superior to that of other Co 3 O 4 NPs@PC. The high capacity especially at high current density and exceptional rate capability of Co 3 O 4 NPs@MDPC manifested it is a promising anode material for LIBs.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
Engineering
·
2022
·
IF 12.834
Youwen Shuai,Xue Huang,Benyin Zhang,Lu Xiang,Hao Xu,Qian Ye,Jinfeng Lu,Jing Zhang
The heterogeneous catalytic activation of peroxymonosulfate (PMS) for wastewater treatment is attracting increased research interest. Therefore, it is essential to find a sustainable, economical, and effective activated material for wastewater treatment. In this study, metal–organic framework (MOF)-5 was used as the precursor, and a stable and recyclable material ZnO@Ni 3 ZnC 0.7 that exhibited good adsorption and catalytic properties, was obtained by the addition of nickel and subsequent calcination. To investigate and optimize the practical application conditions, the elimination of rhodamine B (RhB) in water was selected as the model process. This study demonstrated that the degradation of organic matter in the system involved a coupling of the adsorption and degradation processes. Based on this, the mechanism of the entire process was proposed. The results of scanning electron microscopy, infrared spectrum analysis, and theoretical analysis confirmed that the van der Waals forces, electrostatic attraction, and hydrogen bonding influenced the adsorption process. Electron paramagnetic resonance analysis, masking experiments, and electrochemical tests conducted during the oxidative degradation process confirmed that the degradation mechanism of RhB included both radical and non-free radical pathways, and that the surface hydroxyl group was the key active site. The degradation of the adsorbed substrates enabled the regeneration of the active sites. The material regenerated using a simple method exhibited good efficiency for the removal of organic compounds in four-cycle tests. Moreover, this material can effectively remove a variety of organic pollutants, and can be easily recovered owing to its magnetic properties. The results demonstrated that the use of heterogeneous catalytic materials with good adsorption capacity could be an economical and beneficial strategy.
研究领域:
环境科学
·
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2021
·Vol. 139
·期 3
·51493
·
IF 3.125
Haibo Ouyang,Man Zhou,Jie Fei,Xiao Duan,Tian Liu,Bei Zhao,Jian Feng Huang
The metal organic frameworks (MOF-5) with nanoscale porosity and organic–inorganic heterocyclic structure were chemically grafted onto carbon fibers by solvothermal for forming high mechanical interlocking composite architectures and releasing the interfacial forces, so as to obtain carbon fiber reinforced composite with excellent mechanical and tribological properties. With the multi-scale enhancement of MOF-5, the optimized tensile and bending strength of the composite increased by about 177.9% and 81.3%, respectively. Moreover, the friction coefficient was higher and relatively stable under the continuous wet friction condition, as well as the wear rate was reduced by 44.4%. The work suggests that the application of MOFs can be extended to the field of structural composites.
研究领域:
材料科学
·
复合材料工程
✓ 已验证
产品关联
DOI
高影响因子
Reaction Kinetics Mechanisms and Catalysis
·
2021
·Vol. 134
·期 2
·1003-1015
·
IF 2.081
Chen Anna,Zhang Jin,Zhou Yi,Tang Haiqin
In this study, the MOF-5/BiOBr photocatalyst with microsphere structure was synthesized by hydrothermal method for the first time. The crystal structure, morphology, photoelectric performance and photocatalytic activity of the samples were characterized by XRD, SEM, TEM, XPS and electrochemistry. The results show that the synthesized MOF-5/BiOBr photocatalyst exhibits better photocatalytic performance than pure MOF-5 and BiOBr under simulated sunlight. The efficiency of Rhodamine B (RhB) removal based MOF-5/BiOBr composite (MOF-5 with mass ratio of MOF-5/BiOBr = 20 wt% of) reached 99.7%. The possible photocatalytic mechanism is discussed through the capture experiment of active species. The enhanced photocatalytic performance of the MOF-5/BiOBr composite may be related to the interaction between BiOBr and MOF-5 and the type II charge transfer path. The catalyst has simple preparation process, low cost, high activity under natural light, and high efficiency, and is expected to play a role in the treatment of environmental wastewater. This work provides a new insight for designing MOF-5 based photocatalyst.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Biosensors-Basel
·
2022
·Vol. 12
·期 7
·544
·
IF 5.743
Jingyi Li,Ning Zhang,Xin Yang,Xinting Yang,Zengli Wang,Huan Liu
This study presents a novel composite thin film based on rhodamine B encapsulated into MOF-5 (Metal Organic Frameworks) as a fluorescence sensor for the real-time detection of the freshness of chilled pork. The composite film can adsorb and respond to the volatile amines produced by the quality deterioration of pork during storage at 4 °C, with the fluorescence intensity of RhB decreasing over time. The quantitative model used for predicting the freshness indicator (total volatile base nitrogen) of pork was built using the fluorescence spectra (excited at 340 nm) of the RhB@MOF-5 composite film combined with the partial least squares (PLS) algorithm, providing Rc2and Rp2values of 0.908 and 0.821 and RMSEC(root mean square error of calibration) and RMSEP (root mean square error of prediction) values of 3.435 mg/100 g and 3.647 mg/100 g, respectively. The qualitative model established by the partial least squares discriminant analysis (PLS-DA) algorithm was able to accurately classify pork samples as fresh, acceptable or spoiled, and the accuracy was 86.67%.
研究领域:
食品科学
·
传感技术
·
生物化学
✓ 已验证
DOI
高影响因子
Analytical Methods
·
2016
·Vol. 8
·期 10
·2290-2296
·
IF 1.915
Yonggui Song,Couchong Gong,Dan Su,Yuan Shen,Yonghai Song,Li Wang
In this work, the spherical porous MOF-5 microstructures supported by three-dimensional (3D) kenaf stem-derived porous carbon (KSC) (denoted as MOF-5/3D-KSC) composites were constructed for ascorbic acid (AA) sensing. The formation of MOF-5/3D-KSC was verified by scanning electron microscopy, X-ray powder diffraction and energy dispersive X-ray spectroscopy. The results showed that spherical porous MOF-5 microstructures were evenly arrayed on the surface of 3D-KSC via a simple one-step hydrothermal method, which could greatly increase the effective surface area, stability and active sites. The MOF-5/3D-KSC composites were directly used to prepare integrated MOF-5/3D-KSC electrodes for AA sensing, and the integrated electrodes showed better performance for AA detection than traditional enzyme-based sensors and nonenzymatic sensors. The sensor exhibited good stability, wide linear range (0.7 μM to 11.5 mM) and low detection limit (0.24 μM). Hence, the MOF-5/3D-KSC composites could be a potential material for sensing platforms.
研究领域:
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Mengqi Wang,Ting Yang,Tiantian Yue,Zhong Wang,Jian Fang,Yuqing Liu
The interfacial interaction of carbon nanotubes (CNTs) significantly enhances the output capability of piezoelectric nanogenerators (PENGs). However, overcoming the limitation of low specific surface area in one-dimensional materials remains a significant challenge. This paper introduces a hydrothermal method for composite MOF (C-M) using CNTs and MOF-5, demonstrating localized co-doping between them. Coaxial electrospun piezoelectric fiber membranes (C-MNF) were then prepared using PVDF/PAN as the matrix. Benefiting from C-M’s excellent crystallinity and its synergistic interaction with the polymer matrix, the C-MNF-based PENG showed a 125 % increase in output voltage, reaching ∼25 V, compared to coaxial membranes simply mixing MOF-5 and CNTs. As a result, its short-circuit current was ∼1.8 μA, with a piezoelectric coefficient d 33 of ∼400 pC N −1 . Consequently, this material exhibits superior piezoelectric output capabilities, paving the way for future functional material fabrication.
研究领域:
材料科学
·
能源技术
·
纳米科技
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Chengbin Guo,Yubo Lian,Chen Huang,Zhenyu Chen
A novel sustained-release system was designed on the basis of metal–organic framework-5 (MOF-5) as a nanocontainer to load benzotriazole (BTA). Furthermore, the fabricated BTA/MOF-5 (BTA@MOF-5) was doped to the epoxy coating to improve the anticorrosion performance of copper. UV spectrophotometry proved the sustained-release behavior of BTA@MOF-5. Salt spray tests and electrochemical measurements demonstrated the self-healing ability of the composite coating . This novel sustained-release system provides a new strategy for metal protection.
研究领域:
材料科学
·
化学工程
·
腐蚀科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Ruixia Yang,Qiaohong Peng,Bing Yu,Youqing Shen,Hailin Cong
Yolk-shell Fe 3 O 4 @MOF-5 nanocomposites were synthesized by utilizing a simple solvothermal method. The physicochemical properties of the yolk-shell Fe 3 O 4 @MOF-5 nanocomposites were characterized by transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Brunauer–Emmett–Teller (BET) and vibrating sample magnetometer (VSM) methods. The nanocomposites had a catalytic yolk, a hollow cavity and a porous shell. The nanocomposites had relatively high specific surface area of 203 m 2 g −1 and showed superparamagnetic property. The catalytic activities of the yolk-shell Fe 3 O 4 @MOF-5 nanocomposites were evaluated by using methylene blue dye as a model pollutant. It is demonstrated that the yolk-shell Fe 3 O 4 @MOF-5 nanocomposites as a heterogeneous Fenton-like catalyst exhibited excellent catalysis since the internal cavity provided a relatively stable micro-environment for the reaction of the active ·OH radicals and the pollutants on the basis of the confinement effect. Furthermore, the yolk-shell Fe 3 O 4 @MOF-5 nanocomposites could be lightly separated from the pollutant solution by an external magnetic field and maintained good catalytic activity after five recycles, indicating the good stability of the nanocomposites.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Shaoan Cheng,Yangxi Li,Zhen Yu,Ruonan Gu,Wei Wu,Yuqing Su
Polyethylene terephthalate (PET) accounts for 40 % of discarded plastics, and its recycling products have outstanding environmental protection and energy-saving performance, so how to improve the current low recycling rate of waste PET has caught increasing attention. In this paper, waste PET plastic was depolymerized to prepare terephthalic acid (TPA) as an organic linker to synthesize MOF-5. MOF-5 was applied to the adsorption of tetracycline (TC). The batch experiments exhibited that kinetic and isotherm data best fitted the pseudo-first-order model and Langmuir isotherm model with a maximum adsorption capacity of 2325.55 mg g −1 . The regeneration rate of MOF-5 at the fifth cycle was 85.51 %. X-ray photoelectron spectroscopy (XPS) technique and Fourier Transform Infrared (FTIR) spectroscopy both indicated the main adsorption mechanism of MOF-5 toward TC could be attributed to hydrogen bonding and the ionic interactions between the unsaturated bonds (C = O and O–C = O) in MOF-5 and TC molecules. Alginate hydrogel with 30–150 mg MOF-5 loading provided better adsorption performance toward TC than MOF-5 powder, and 90 mg MOF-5 loaded hydrogel performed the highest removal rate of 66.28 %. This work proposed a novel method using waste plastics as raw materials to synthesize pollutant adsorbent, which had an enlightening effect on pollutant treatment.
研究领域:
环境科学
·
材料科学
·
化学工程
·
废物管理
✓ 已验证
产品关联
DOI
高影响因子
POLYMER
·
2024
·
IF 4.1
Jing Xu,Pingbo Zhang,Mingming Fan,Pingping Jiang,Shijun Chen,Xunxun Sheng
To improve the weak interaction between poly (butylene adipate‐co‐terephthalate) (PBAT) and poly (lactic acid) (PLA) blends, this study added modified metal-organic frameworks (MOFs) to enhance the interfacial bonding strength between PBAT and PLA. MOF-5 nanoparticles were synthesized by room temperature synthesis and modified with KH-560. PBAT/PLA/KH-560@MOF films were prepared by solvent casting. The microscopic morphology, mechanical properties, thermal properties, hydrophobicity, water vapor transmission rate and antimicrobial properties of the composite films were investigated. The results showed that KH-560@MOF nanoparticles were uniformly dispersed in the polymer matrix of PBAT and PLA, reducing phase interface defects. Mechanical properties of PLA/PBAT improved in the presence of KH-560@MOF. The breaking elongation and tensile strength values were maximized when adding 1 wt% KH-560@MOF. Doping of KH-560@MOF improves hydrophobicity and water vapor transmission rate of films. Zn 2+ in MOF-5 imparts antimicrobial properties to the film, showing antimicrobial activity against both Gram-positive and Gram-negative food-borne pathogens (i.e., E. coli and S.aureus ). This work enriched the design of compatibilizer for the PLA/PBAT blend and provided a novel approach for expanding the application of MOFs.
研究领域:
材料科学
·
生物学
·
食品科学
✓ 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）