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uio-66
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An Investigation on the Role of Metal-Organic Framework (MOF) on the Network Structure and Physical/Mechanical Properties of EPDM Rubber
, M.Sc. Thesis Sharif University of Technology ; Molvai, Hossein (Supervisor)
Abstract
Ethylene-propylene-diene monomer rubber (EPDM) is one of the elastomers that shows non-polar behavior, high elasticity at low temperatures, excellent thermal and ozone resistance, and high electrical resistance. In this respect, it is used in various applications such as sealing materials, conveyor belts, waterproof materials, cables, etc. One of the most important applications of this rubber is its use as a sealing material. In this case, the resilience behavior plays an important role in the sealing behavior of the EPDM rubber. Especially in cases such as the car's hydraulic braking system where high service temperatures and dynamic stresses are applied, resilience behavior will be more...
Polymeric Membrane Modification for Nitrogen-Compounds Removal from Aqueous Phase
, M.Sc. Thesis Sharif University of Technology ; Musavi, Abbas (Supervisor) ; Bastani, Dariush (Supervisor)
Abstract
In this research, a novel nanofiltration membrane was used to separate nitrate from water as a nitrogen-containing compound. The membrane was fabricated by interfacial polymerization on the modified polysulfone substrate. To improve the efficiency of nitrate removal, several surface and bulk modifiers were used. As modified with LiCl and PVP polymer, the substrate matrix was modified to have the highest porosity to reduce the mass transfer resistance and the much surface area to form a polyamide layer on it. The polyamide layer was then synthesized by interfacial polymerization using a blend of MPD and PIP in different ratios (1: 1 optimum ratio) in reaction with TMC (optimum concentration...
Preparation and Characterization of Anticorrosive Epoxy Coating based on Inhibitor Loaded Metal-Organic Framework Nanostructures
, M.Sc. Thesis Sharif University of Technology ; Shojaei, Akbar (Supervisor) ; Molavi, Hossein (Co-Supervisor)
Abstract
In this study, metal-organic frameworks (MOFs) UiO-66 and NH2-UiO-66 were prepared and loaded with 2-mercaptobenzothiazole as corrosion inhibitor .Epoxy coatings containing inhibitor loaded nanoparticles were applied on mild steel to corrosion protection in 3.5 wt.% NaCl solution. Fourier transform infrared spectroscopy (FTIR) was used to confirm Inhibitor loading. In order to estimate the loading amount of corrosion inhibitor, thermogravimetric analysis was investigated. FE-SEM images demonstrated nanoparticle dispersibility in epoxy matrix.The results of electrochemical impedance spectroscopy (EIS) alalysis showed improvement of the corrosion resistance of the coatings containing...
Improvement of Physical and Mechanical Properties of Poly (Ethylene Terephthalate) (PET) by Incorporating Metal-organic Framework (MOF) Nanoparticles
, M.Sc. Thesis Sharif University of Technology ; Shojaei, Akbar (Supervisor) ; Molavi, Hossein (Co-Supervisor)
Abstract
Over the past decade, MOFs have been extensively studied due to their very high specific surface area and porous structure. Among a wide range of MOFs, UiO-66 has produced widespread attention for its excellent solvent resistance and high thermal stability. This nanoparticle is formed by 12 coordinates between Zr6O4(OH)4 unit and terephthalic acid ligand, and it seems that the similarity of its organic ligand with one of the PET-forming monomers makes them highly compatible. In this study, for the first time, the role of UiO-66 nanoparticles in improving the amount and rate of crystallization and mechanical and rheological properties of PET was investigated using the melt mixing method. For...
Enhancing CO2/N2 adsorption selectivity via post-synthetic modification of NH2-UiO-66(Zr)
, Article Microporous and Mesoporous Materials ; Volume 257 , February , 2018 , Pages 193-201 ; 13871811 (ISSN) ; Eskandari, A ; Shojaei, A ; Mousavi, S. A ; Sharif University of Technology
Elsevier B.V
2018
Abstract
A metal organic framework (MOF) modified with amino group (NH2-UiO-66) was functionalized with glycidyl methacrylate (GMA) via ring opening reaction between the amine species in the framework and epoxy groups in GMA. The products were characterized by X-ray powder diffraction (XRD), nuclear magnetic resonance (NMR) spectroscopy, field emission scanning electron microscopy (FESEM), thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FTIR), inductively coupled plasma-optical emission spectrometry (ICP-OES), and N2 adsorption–desorption measurements to monitor their textural properties before and after functionalization. The BET surface area, pore volume, and pore...
Fabrication of novel poly(N-vinylcaprolactam)-coated UiO-66-NH2 metal organic framework nanocarrier for the controlled release of doxorubicin against A549 lung cancer cells
, Article Journal of Drug Delivery Science and Technology ; Volume 66 , 2021 ; 17732247 (ISSN) ; Hassanzadeh Nemati, N ; Ramazani Saadatabadi, A ; Sadrnezhaad, S. K ; Sharif University of Technology
Editions de Sante
2021
Abstract
The nano metal-organic frameworks (NMOFs) have been developed for drug delivery systems due to their high porosity and large specific surface area. In this work, UiO-66-NH2 NMOFs were synthesized via the microwave heating method and doxorubicin (DOX) as an anticancer drug was incorporated into the UiO-66-NH2 NMOFs. Then, poly(N-vinylcaprolactam) (PNVCL) synthesized by the free radical polymerization was coated on the UiO-66-NH2 NMOFs surface to fabricate dual pH/temperature-responsive nanocomposite against A549 lung cancer cells death in vitro. The synthesized nanocarriers were characterized using FTIR, 1H NMR, DLS, XRD, SEM, FESEM, TGA, and BET analysis. The average particle sizes of...
Properties Enhancement of Styrene-butadiene-rubber (SBR) by Incorporating Hybrid Nanoparticles based on Metal-Organic Framework (MOF)/Carbon Nanoparticle
, M.Sc. Thesis Sharif University of Technology ; Shojaei, Akbar (Supervisor) ; Molavi, Hossein (Co-Supervisor)
Abstract
Flexible polymers (elastomers) are especially suitable for dynamic applications, and carbon based fillers are well-known filler for elastomers. These types of fillers are widely used in elastomer matrices for various commercial applications. Some of carbon nano fillers like Nanodiamond cannot (ND) impart such high degree of reinforcement to polymer matrices mainly because of improper filler dispersion and lack of strong filler-polymer interaction.In this effort, we examine the effects of nanodiamond/UiO-66 hybrid nanostructured materials when they are incorporated in styrene-butadiene rubber (SBR) in terms of mechanical, thermal and electrical properties of the nanocomposites.Different...
Synthesis of Novel Nanocomposites based on Metal Organic Frameworks and Investigation of their Applications as Catalysts for some Coupling Reactions
, M.Sc. Thesis Sharif University of Technology ; Matloubi Moghaddam, Firouz (Supervisor)
Abstract
The magnetic MOF-based catalytic system has been reported here to be an efficient catalyst for synthesis of benzonitriles and diarylethers of aryl halides under optimal conditions. The MOF catalyst was built based on magnetic nanoparticles and UiO-66-NH2 which further modified with 2,4,6-trichloro-1,3,5-triazine and 5-phenyl tetrazole and the catalyst structure was confirmed by various techniques. Furthermore, the products’ yields were obtained in good to excellent for all reactions under mild conditions which result from superior activity of the synthesized heterogeneous catalyst containing palladium. Also, the magnetic property of the MOF-based catalyst makes it easy to separate from...
Fabrication and Modification of Hollow Fiber Polysulfone Membrane Using Uio-66-NH2 and Mil-125-NH2 Nanoparticles by Mixed Matrix Method
, M.Sc. Thesis Sharif University of Technology ; Mousavi, Abbas (Supervisor) ; Bastani, Daruish (Supervisor)
Abstract
This study aims to investigate polysulfone (PSF) hollow fiber mixed matrix membranes (MMMs) properties containing Uio-66-NH2 and Mil-125-NH2 nanoparticles, groups of metal-organic frameworks (MOFs), for hemodialysis application. The nanoparticles were synthesized, and the membranes were produced by the phase inversion method. Membranes characterization conducted by ATR-FTIR, FE-SEM, EDX, TEM, and AFM was confirmed the presence of MOFs nanoparticles. Also, the evaluation of specific surface area of nanoparticles was done by BET. The water contact angle (WCA) results indicated the improvement of MMMs hydrophilicity, enhancing the pure water flux from 46.8 L/ m2h for the pristine membrane to...
Fabrication and Evaluation of Nanostructured Photocatalysts Using Metal-Organic Frameworks for Photocatalytic Oxidative Desulfurization of Liquid Fuel
, M.Sc. Thesis Sharif University of Technology ; Khorasheh, Farhad (Supervisor) ; Ghotbi, Cirous (Supervisor) ; Larimi, Afsaneh (Supervisor) ; Asgharinejad, Ali Akbar (Co-Supervisor)
Abstract
Ti-UIO-66(Zr) nanocomposites have been prepared via a modified one-step solvothermal methodology and evaluated in photocatalytic oxidative desulfurization. Extensive characterization by X-ray diffraction (XRD), Fourier transforms infrared spectroscopy (FT-IR), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), Energy-dispersive X-ray spectroscopy (EDX), ultraviolet-visible diffuse reflectance spectroscopy (UV-vis DRS), photoluminescence spectroscopy (PL), nitrogen adsorption-desorption, and thermogravimetric analysis (TGA), have revealed the role of Ti loading, on Ti speciation and the structure of the composite materials. Their performance have been...
Production of Mixed-Matrix Composite Membranes Based on Metal-Organic Framework/Polyvinylidene Fluoride for Desalination of High Saline Water in Membrane Distillation
, M.Sc. Thesis Sharif University of Technology ; Bastani, Dariush (Supervisor) ; Mousavi, Abbas (Supervisor)
Abstract
In this study, membrane distillation was used for desalination of high saline water. Recently, the synthesis of nanoparticles for the synthesis of membranes for membrane distillation has shown incredible improvement in the morphological properties, flux, and rejection. In this study, by incorporating UiO-66 functionalized with Palmitic acid into PVDF/PEG polymer solution we could improve membranes properties. Functionalization of UiO-66 with Palmitic acid was confirmed with FTIR, XRD, BET, SEM. In the membrane containing 3% Palmitic acid-UiO-66, the flux was increased by 46.5%, resulting in a flux of 12.6 LMH, and the salt rejection was improved from 99.5% to 99.9%. These results confirmed...
Enhancing forward osmosis (FO) performance of polyethersulfone/polyamide (PES/PA) thin-film composite membrane via the incorporation of GQDs@UiO-66-NH2 particles
, Article Journal of Water Process Engineering ; Volume 33 , 2020 ; Bayrami, A ; Amini, M ; Sharif University of Technology
Elsevier Ltd
2020
Abstract
In this study, first, the UiO-66-NH2 metal-organic frameworks (MOFs) were modified with graphene quantum dots (GQDs) to facilitate the water attraction on MOF surface as well as improve their compatibility/affinity with the polyamide layer matrix of forward osmosis (FO) membranes. Next, to fabricate a new type of thin-film nanocomposite (TFN) membranes, the synthesized GQDs@UiO-66-NH2 composites are incorporated into the polyamide (PA) selective layer of FO membranes during the interfacial polymerization reaction of m-phenylenediamine (MPD) and trimesoyl chloride (TMC). The influence of the prepared fillers on the chemical structure, morphology, surface roughness and hydrophilicity of the PA...
Mixed-matrix composite membranes based on uio-66-derived MOFs for CO 2 separation
, Article ACS Applied Materials and Interfaces ; Volume 11, Issue 9 , 2019 , Pages 9448-9461 ; 19448244 (ISSN) ; Shojaei, A ; Sharif University of Technology
American Chemical Society
2019
Abstract
We demonstrated a novel mixed-matrix composite membrane (MMCM) based on acrylated polyurethane (APU) and UiO-66 nanoparticles to separate CO 2 /N 2 mixture. UiO-66 and functionalized UiO-66 including NH 2 -UiO-66 and glycidyl methacrylate (GMA)-UiO-66 were loaded into APU/2-hydroxyethyl methacrylate (APUH) matrix at variable concentrations between 3 and 30 wt %. APUH/GMA-UiO-66 MMCMs exhibited strong adhesion with a support layer of polyester/polysulfone, which was not deteriorated after immersion in water for a long time (20 days). Incorporation of UiO-66 and its functionalized forms increased simultaneously permeability and CO 2 /N 2 selectivity, which were indeed superior in comparison...
Selective dye adsorption by highly water stable metal-organic framework: Long term stability analysis in aqueous media
, Article Applied Surface Science ; Volume 445 , 2018 , Pages 424-436 ; 01694332 (ISSN) ; Hakimian, A ; Shojaei, A ; Raeiszadeh, M ; Sharif University of Technology
Elsevier B.V
2018
Abstract
A highly water stable metal-organic framework (MOF) based on zirconium, i.e. UiO-66, was synthesized and then employed to adsorptive removal of an anionic dye, methyl orange (MO), and a cationic dye, methylene blue (MB), from aqueous solution. In this work, for the first time, the long term stability of UiO-66 in water was investigated for 12 months. X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM) and N2 adsorption/desorption analysis were employed to monitor the textural alteration of UiO-66 during water aging. The results indicated that the structure of UiO-66 was mostly retained and its adsorption capacity toward dyes exhibited minor loss after long term water...
Evaluation of UiO-66 metal organic framework as an effective sorbent for curcumin's overdose
, Article Applied Organometallic Chemistry ; Volume 32, Issue 4 , 2018 ; 02682605 (ISSN) ; Zamani, M ; Aghajanzadeh, M ; Kheiri Manjili, H ; Danafar, H ; Shojaei, A ; Sharif University of Technology
John Wiley and Sons Ltd
2018
Abstract
Metal organic frameworks (MOFs) UiO-66 (UiO stands for University of Oslo) and NH2-UiO-66 were prepared and characterized as sorbent (antidotal agents) for curcumin (CUR) adsorption. The structure of products were characterized by X-ray powder diffraction (XRD), Field emission scanning electron microscopy (FESEM), thermogravimetric analysis (TGA), Attenuated Total Reflectance-Fourier transform infrared spectroscopy (ATR-FTIR), and N2 adsorption–desorption measurements. FESEM showed NH2-UiO-66 displayed symmetrical crystals with triangular base pyramid morphology, with the particle size around 100 nm and uniform size distribution. Adsorption capacities of CUR/MOFs with different mass ratios...
Superior chemical stability of UiO-66 metal-organic frameworks (MOFs) for selective dye adsorption
, Article Chemical Engineering Journal ; Volume 399 , 2020 ; Mohammadkhani, R ; Ahmadipouya, S ; Shokrgozar, A ; Rezakazemi, M ; Molavi, H ; Aminabhavi, T. M ; Arjmand, M ; Sharif University of Technology
Elsevier B.V
2020
Abstract
The presence of dyes as pollutants in wastewater sources from textile industries can cause significant health issues if they are not adequately treated. Dye adsorption to entrap contaminants in nanoparticle pores has created considerable attention in recent years due to the environmental concerns occurring as a result of spillage of dyes in water bodies. In efforts to understand adsorption capability UiO-66, metal-organic frameworks (MOFs) were developed and examined for the separation of four pollutant dyes containing methyl red (MR), methyl orange (MO), malachite green (MG), and methylene blue (MB), which are widely used in textile industries. The adsorbent structural stability in water,...
Thin-film nanocomposite forward osmosis membranes modified with Zr-based metal–organic framework to improve desalination performance
, Article Applied Organometallic Chemistry ; Volume 34, Issue 2 , 2020 ; Bayrami, A ; Amini, M ; Sharif University of Technology
John Wiley and Sons Ltd
2020
Abstract
In present work, first, the water-stable metal–organic framework (MOF) nanocrystals, UiO-66-(F)4, were synthesized under green reaction condition and then some PES/PA thin-film nanocomposite (TFN) membranes were prepared using this synthesized nanocrystals (as modifier) and polyethersulfone (as the substrate). The obtained MOF and membranes were characterized by various characterization techniques such as FE-SEM, AFM, PXRD, contact angle measurements and FT-IR spectroscopy. Finally, the forward osmosis performance of the resultant membranes was evaluated by using different concentrations of NaCl as a draw solution and deionized water as a feed solution. Among all used membranes, the membrane...
Enhanced adsorption removal performance of UiO-66 by rational hybridization with nanodiamond
, Article Microporous and Mesoporous Materials ; Volume 296 , April , 2020 ; Rahmani, P ; Shojaei, A ; Molavi, H ; Sharif University of Technology
Elsevier B.V
2020
Abstract
In the present work, a series of nanohybrids based on UiO-66 as a physicochemical stable metal-organic framework (MOF) and different amounts of thermally oxidized nanodiamond (OND) (0.5–10 wt%) were synthesized and used as adsorbents for anionic (methyl red, MR, and methyl orange, MO) and cationic (malachite green, MG, and methylene blue, MB) dyes from contaminated water in single and binary dye solutions. The single adsorbents and their nanohybrids were characterized by FESEM, FTIR, XRD,TGA, BET, and zeta potential measurements. The experimental adsorption results displayed that the synthesized nanohybrids presented higher adsorption capacity for anionic dyes compared to cationic dyes in...
Adsorption performance of UiO-66 towards organic dyes: effect of activation conditions
, Article Journal of Molecular Liquids ; 2020 ; Ahmadipouya, S ; Shokrgozar, A ; Molavi, H ; Rezakazemi, M ; Ahmadijokani, F ; Arjmand, M ; Sharif University of Technology
Elsevier B.V
2020
Abstract
The Zr-based metal-organic framework (MOF, UiO-66) was synthesized solvothermally. The synthesized UiO-66 was activated using different solvents (acetone, chloroform, and ethanol) via two activation methods of centrifugation and Soxhlet extraction over different periods (1–10 days). The crystalline structure and morphology of the synthesized UiO-66s were characterized by X-ray diffraction (XRD), nitrogen adsorption-desorption, and field-emission scanning electron microscopy (FESEM) techniques. The adsorption behaviors of the synthesized UiO-66s were then investigated by selecting anionic methyl red (MR) and cationic methylene blue (MB) as the model dyes. It was found that a change in...
Thin film UV-curable acrylate polyurethane/MOF mixed matrix membranes for CO2 separation
, Article 18th European Conference on Composite Materials, ECCM 2018, 24 June 2018 through 28 June 2018 ; 2020 ; Molavi, H ; Mousavi, S. A ; Adamant Composites Ltd.; Hellenic Aerospace Industry S.A; JEC Group; Materials Today; Photron; Shimadzu Europa GmbH ; Sharif University of Technology
Applied Mechanics Laboratory
2020
Abstract
The major obstacles in gas separation by mixed-matrix composite membranes (MMCMs) are poor dispersion and poor affinity between polymers and fillers. The present study demonstrates that these challenges can be overcome appropriately by utilizing a series of synthesized MMCMs. MMCMs were prepared with UV-curable polyurethane acrylate and UiO-66 as selective layer and polyester/polysulfone (PS/PSF) as support layer. The physical properties of prepared MMCMs were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM) and Fourier transform infrared spectroscopy (FTIR). Microscopic analysis by FESEM revealed that desirable nanoscale dispersion of UiO-66,...