COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2018
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IF 2.829
Mingjuan Han,Ying Li,Zheng Gu,Huali Shi,Chong Chen,Qiang Wang,Hui Wan,Guofeng Guan
A novel functionalized MOF heterogeneous catalyst (MIL-101(Cr) @MBIAILs), 2-Mercaptobenzimidazole ILs with electron-rich SH groups immobilized onto the surface of the well-defined MIL-101(Cr) frameworks, was constructed and fabricated by the S Cr coordination bond on the basis of the facile post-synthetic modification strategy. The heterogeneous catalyst was measured by XRD , FTIR, SEM, TEM , TGA , EA and N 2 adsorption–desorption, and the catalytic behavior of the catalyst was assessed by the esterification about oleic acid and methanol as a model reaction. The results showed that MBIAILs have been successfully immobilized onto the surface of MIL-101(Cr) frameworks by S Cr coordinate bonds. More importantly, the conversion of oleic acid just decreased from 91.0% to 82.1% when the catalyst had been reused six times. This exhibited the prepared catalyst had superior catalytic behavior and excellent reusability.
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JOURNAL OF CHROMATOGRAPHY A
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2012
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IF 4.531
Yan-Yan Fu,Cheng-Xiong Yang,Xiu-Ping Yan
Metal-organic framework MIL-100(Fe) was explored as a novel stationary phase for both normal-phase and reverse-phase high performance liquid chromatography. Two groups of analytes (benzene, toluene, ethylbenzene, naphthalene and 1-chloronaphthalene; aniline, acetanilide, 2-nitroaniline and 1-naphthylamine) were used to test the separation performance of MIL-100(Fe) in the reverse-phase mode, while the isomers of chloroaniline or toluidine were employed to evaluate its performance in the normal-phase mode. The MIL-100(Fe) packed column gave a baseline separation of all the tested analytes with good precision. The separation was controlled by negative enthalpy change and entropy change in the reverse-phase mode, but positive enthalpy change and entropy change in the normal-phase mode. The relative standard deviations of retention time, peak area, peak height, and half peak width for eleven replicate separations of the tested analytes were 0.2–0.7%, 0.5–3.6%, 0.6–2.3% and 0.8–1.7%, respectively. The mesoporous cages, accessible windows, excellent chemical and solvent stability, metal active sites and aromatic pore walls make MIL-100(Fe) a good candidate as a novel stationary phase for both normal-phase and reverse-phase high performance liquid chromatography.
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PubMed
高影响因子
RSC Advances
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2015
·Vol. 5
·期 57
·46301-46306
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IF 3.84
Jing Fang Guo,Rong Mei Fang,Cheng Zhi Huang,Yuan Fang Li
In order to eliminate the scattered light induced by the signal amplifier in fluorescence anisotropy (FA) assays, a nanosized metal–organic framework MIL-101, ranging from 80–500 nm, has been synthesized through a hydrothermal method with the addition of glycerol. We chose the 100 nm MIL-101 to enhance FA for label-free detection of the respiratory syncytial virus (RSV) gene sequence and the DNA-intercalating dye SYBR Green I (SGI) as the fluorophore, based on the different affinities of MIL-101 toward ssDNA and dsDNA. The nanosized MIL-101 has a negligible scattering effect owing to its smaller particle size, so all of the experimental data of FA values were smaller than the maximum initial anisotropy of 0.4. As a specific advantage, a dual amplification result of not only an increase in the FA value of SGI/ssDNA (r1) but also a decrease in the FA value of SGI/dsDNA (r2) was presented at the same time. Consequently, a larger FA value change Δr (Δr, Δr = r1 − r2) was obtained and contributed to improve the sensitivity. In addition, the quantitative detection of the target DNA (T) was achieved according to the relationship between Δr and the concentration of T. In the presence of MIL-101, the Δr is 7-fold higher than that without MIL-101 and achieved the sensitive and selective detection of RSV DNA.
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CHEMICAL ENGINEERING JOURNAL
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2016
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IF 5.31
Hongxu Guo,Dongfang Wang,Jianhua Chen,Wen Weng,Minqiang Huang,Zishan Zheng
A novel metal-organic framework (MOF) material, flake-like NH 2 -MIL-53(Cr), was prepared by a simple reflux method and then characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS). The as-prepared MOF was found to be an effective material for the selective electrochemical detection of microgram levels of Pb 2+ in aqueous solution. Detection was performed by square wave anodic stripping voltammetry. The NH 2 -MIL-53(Cr)-modified electrode showed excellent selectivity and stability for Pb 2+ detection. The electrochemical properties and applications of the modified electrode were studied. Operational parameters such as pH, deposition potential, and deposition time, were also optimized to detect trace amounts of metal ions. This method offers a new strategy for heavy metal detection using MOF materials.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2017
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IF 9.446
Baolin Yan,Lijuan Zhang,Zhiyong Tang,Mohammad Al-Mamun,Huijun Zhao,Xintai Su
Engineering metal-organic frameworks (MOFs) into hierarchical structured materials is crucial for providing a viable platform to construct efficient catalysts and broaden their applications in energy conversion and photocatalysis. Here, a simple and efficient solid-state pyrolysis of Ti-MOFs (NH 2 -MIL-125) sacrificial template combined with a photo-reduction process was developed to construct a series of hierarchical TiO 2 decorated with Pd nanoparticles. The hierarchical TiO 2 inherited the well-defined rounded rectangular submicron-tablet from NH 2 -MIL-125 precursor and was constituted of uniform anatase TiO 2 nanoparticles with an average size of 12 nm. Furthermore, the photocatalytic activity for the hydrogen production from water-methanol solution was improved by the optimization of the content of Pd as a cocatalyst, and the maximum was achieved with a Pd loading of 1.5%. The rate of H 2 evolution of 1.5% Pd decorated hierarchical TiO 2 (1.5% Pd/TiO 2 ) reached to 979.7 μmol h −1 and 112.7 μmol h −1 , under UV–vis light and simulated solar light, respectively. This unusual photocatalytic activity may be resulted from the positive synergetic effect of efficient light absorption, promoted separation and migration of photo-induced electron-hole carriers. The work highlights the potential of the MOFs-based hierarchical TiO 2 in the photocatalytic water splitting under solar light.
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APPLIED SURFACE SCIENCE
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2017
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IF 3.387
Fei Ye,Houfen Li,Hongtao Yu,Shuo Chen,Xie Quan
Protons tend to bond strongly with unsaturated-coordinate S element located at the edge of nano-MoS 2 and are consequently reduced to H 2 . Therefore, increasing the active S atoms quantity will be a feasible approach to enhance hydrogen evolution. Herein we developed a porous TiO 2 derived from metal organic frameworks (MOFs) as scaffold to restrict the growth and inhibit the aggregation of MoS 2 nanosheets. As a result, the thickness of the prepared MoS 2 nanosheets was less than 3 nm (1–4 layers), with more edges and active S atoms being exposed. This few-layer MoS 2 -porous TiO 2 exhibits a H 2 evolution rate of 897.5 μmol h −1 g −1 , which is nearly twice as much as free-stand MoS 2 nanosheets and twenty times more than physical mixture of MoS 2 with porous TiO 2 . The high performance is attributed to that more active edge sites in few-layer MoS 2 -porous TiO 2 are exposed than pure MoS 2. This work provides a new method to construct MOFs derived porous structures for controlling MoS 2 to expose active sites for HER.
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FOOD CHEMISTRY
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2024
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IF 8.5
Yu Zou,Wanshan Wang,Fengyin Duan,Wen Yun,Hong Chen,Yiping Li,Lizhu Yang
An ultrasensitive fluorescence detection strategy of chloramphenicol (CAP) was developed based on product catalysis of tetrahedral DNA framework (TDF) and fluorescent quenching of MIL-101(Fe). The product was used to catalyze the reaction. As the concentration of catalyst increased, the reaction time was significantly shorted to 21 min which was much shorter than other isothermal amplification technologies. Moreover, the multiple fluorophores of TDF and high efficient quenching ability of MIL-101(Fe) provided better performance with a linear range for CAP detecting from 1.6 pM to 80 pM and the limit of detection (LOD) as low as 0.67 pM. In addition, it also demonstrated good specificity and resistance to interference from other related antibiotics. Importantly, this strategy exhibited satisfactory relative standard deviation and recovery results for practical application, exhibiting a favorable application prospect in CAP analysis.
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CATALYSIS TODAY
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2024
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IF 5.2
Jiali Zheng,Zhihui Li,Dongsheng Zhang,Xinqiang Zhao,Qian Zhao,Yanji Wang
Bio-based route for preparing adipic acid (AA) from 5-hydroxymethylfurfural is the direction for achieving green and sustainable AA production. In light of the challenges, such as corrosion and difficulties in recycling of I - containing homogeneous catalyst, large amount, high cost, and significant mass transfer resistance of ionic liquid (IL) catalyst, encountered in the current hydrodeoxygenation of 2,5-tetrahydrofurandicarboxylic acid (THFDCA) to AA process. Herein, 1-sulfobutyl-3-methylimidazolium iodide IL ([HSO 3 -b-mim]·I) was used to functionalize MIL-101-NH 2 through acid-base self-assembly approach, hence, a heterogeneous catalyst, IL/MIL-101-NH 2 was designed and applied in the hydrodeoxygenation of THFDCA to bio-based AA for the first time. When reacted at 180 °C for 2 h, the THFDCA conversion and AA yield were 100 % and 99.9 %, respectively. Moreover, IL/MIL-101-NH 2 exhibited remarkable stability and could be reused multiple times with minimal loss in activity. XRD, SEM, FT-IR, BET, XPS, and TG results revealed that the functionalization process involved the reaction between HSO 3 in the IL and NH 2 in MIL-101-NH 2 , forming a salt that chemically bonded the IL to MIL-101-NH 2 , thereby enhancing stability. The excellent hydrodeoxygenation activity was attributed to the synergistic effect of the Lewis acid site (Cr 3+ ) and the Lewis base nucleophilic site (I - ) within IL/MIL-101-NH 2 .
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ACS Applied Nano Materials
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2024
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IF 5.3
Linlin Zheng,Xuechuan Lv,Yanan Chen,Bingyu Wei,Wanqing Hao,Ziyi Zhang,Jingru Yang,Ruiyu Liu,Xu Zhu,Yanli Zhou,Maotian Xu,Xiaohan Gao,Hui Dong
The iron-based metal–organic framework (NH2-MIL-101(Fe)) nanoparticles exhibited excellent conductivity, exceptional catalytic effect, sturdy stability flexible structure, etc. Consequently, it has been exploited in various applications. Herein, NH2-MIL-101(Fe) nanoparticles were successfully synthesized via the hydrothermal method and were grown in situ onto the pencil core electrode (PCE) for simultaneous determination of caffeic acid (CA) and acetaminophen (AP). The PCE decorated by NH2-MIL-101(Fe) as electrode substrate, combined with the dual effects of the excellent electrocatalytic activity of NH2-MIL-101(Fe) and the commendable electrical conductivity of PCE, the constructed sensor exhibits superior electrochemical sensing activity. The electrochemical behavior of CA and AP at the electrodes were investigated mainly by differential pulse voltammetry (DPV) and cyclic voltammetry (CV), exhibiting broad linear responses from 0.1 to 500 μM, and 0.08 to 800 μM for simultaneous detection of CA and AP, with detection limits of 29 nM and 24 nM, respectively. Moreover, the results of CA and AP in drug and human urine using this sensor were satisfactory, which proved that the sensor is feasible to simultaneously detect CA and AP.
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Journal of Environmental Chemical Engineering
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2024
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IF 7.4
Huayu Wang,Yanhua Cao,Changsheng Guo,Ming Ge
Heterogeneous catalyst/persulfate advanced oxidation process has been widely used in antibiotic wastewater treatment . As-designed MIL-88A(Fe)/g-C 3 N 4 composite catalyst firstly activated peroxydisulfate (PDS) to degrade tetracycline (TC) in this work. Activating PDS by MIL-88A(Fe)/g-C 3 N 4 has a higher efficiency and rate toward TC degradation compared with MIL-88A(Fe) and g-C 3 N 4 . After 60 min, the optimal MIL-88A(Fe)/g-C 3 N 4 -5 activated PDS to degrade about 80% of TC in water. The existence of g-C 3 N 4 increases the specific surface area and active Fe 2+ content of MIL-88(Fe), promotes PDS adsorption and utilization, thus showing an excellent catalytic performance for PDS activation. MIL-88A(Fe)/g-C 3 N 4 activated PDS oxidation process synergistically removed TC by free radicals (O 2 •− , •OH and SO 4 •− ) with non-free radicals ( 1 O 2 ), and the effect of some important operating factors on TC removal, the TC degradation pathways and toxicity of TC intermediates were analyzed. Moreover, the MIL-88A(Fe)/g-C 3 N 4 -5 powdered catalyst was designed into a catalytic membrane, which could remove 96% of TC in a short time (<10 min). The cycle tests confirm that powdered MIL-88A(Fe)/g-C 3 N 4 composite catalyst and its catalytic membrane have a good recyclability and stability, demonstrating that this catalyst possesses a practical application potential in the treatment of TC polluted wastewater.
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RENEWABLE ENERGY
·
2025
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IF 9.1
Jingchuan Guo,Yan Gao,Xuankai Cao,Linxuan Li,Xin Yu,Shidan Chi,Haoyu Liu,Guohong Tian,Xudong Zhao
The technology of using electricity generated from renewable energy sources such as wind and solar power for water electrolysis to produce hydrogen has achieved high efficiency, high purity, and environmental friendliness. However, its further development is constrained by the high overpotential of the oxygen evolution reaction (OER) and the high cost of precious metal catalysts. The methanol oxidation reaction (MOR) as an alternative to OER can significantly reduce overall energy consumption and accelerate the hydrogen evolution reaction. This study innovatively utilizes the metal-organic framework (MOF) of NH₂-MIL-88(Fe) to introduce Ni doping, preparing a series of Fe x Ni y -MOF and their bimetallic carbon derivatives (Fe x Ni y /C) through solvothermal synthesis and high-temperature carbonization. Results show that FeNi₂/C exhibited excellent performance in OER, with a Tafel slope of 38.69 mV·dec⁻ 1 and an overpotential of 335 mV at 10 mA cm⁻ 2 , comparable to RuO₂. In MOR, the overpotential was 193 mV, reduced by approximately 140 mV compared to OER, with outstanding stability. The catalytic mechanism was analyzed using ion chromatography, revealing the key role of Ni doping in enhancing catalytic activity and stability. This study provides new strategies for improving the electrocatalytic hydrogen production efficiency of renewable energy and reducing the production cost of hydrogen energy.
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JOURNAL OF MOLECULAR STRUCTURE
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2024
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IF 4
Shaopeng Zhang,Jie Ding,Dayong Tian,Jing Wang,Jiale Zhang,Minghua Lu
China faces severe antimony pollution due to long-term, high-intensity mining and smelting operations. Long-term exposure to Sb(III) can lead to chronic respiratory problems. Adsorption method is used to remove Sb(III) because of its simplicity, economy and high efficiency. Therefore, a novel MIL-101(Fe)-Cl/SA hydrogel with oxidation-sorption bifunctionality was developed. 1602 cm −1 and 1025 cm −1 correspond to N H and S = O indicate N-chlorosulfonamide is bonded to MIL-101(Fe)-Cl/SA. MIL-101(Fe)-Cl/SA exhibited rough and wrinkled surfaces with numerous irregular particles by SEM. The presence of O (22 %) and Cl (2 %) confirmed the incorporation of N-chlorosulfonamide and SA into MIL-101(Fe)-Cl/SA by EDS and mappings. The adsorption capacities of MIL-101(Fe)-Cl/SA were 86 mg/g at 298 K and 123.21 mg/g at 328 K by Langmuir model. Kinetic and equilibrium correspond to pseudo-second-order and Langmuir model, respectively. Adsorption was spontaneous and endothermic by thermodynamic analysis. MIL-101(Fe)-Cl/SA exhibited enhanced selectivity in solution containing various ions. Moreover, MIL-101(Fe)-Cl/SA demonstrated potential for regeneration and reuse. The removal process primarily involved oxidation, electrostatic interaction, and complexation. In summary, the capability of MIL-101(Fe)-Cl/SA to adsorb and oxidize Sb(III) underscores its promising potential in mitigating the hazards associated with Sb(III).
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