ᶫ-Leucine Loading and Release in MIL-100 Nanoparticles

Synthesis of the MIL-100 metal-organic framework particles was carried out by hydrothermal (HT) and microwave (MW)-assisted methods. Transmission electron microscopy showed formation of microparticles in the course of hydrothermal synthesis and nanoparticles for microwave-assisted synthesis. Powder X-ray diffraction confirmed formation of larger crystallites for hydrothermal synthesis. Particle aggregation in aqueous solution was observed by dynamic light scattering. However, the stability of both samples could be improved in acetic acid solution. Nitrogen sorption isotherms showed high porosity of the particles. ᶫ-leucine molecule was used as a model molecule for loading in the porous micro- and nanoparticles. Loading was estimated by FTIR spectroscopy and thermogravimetric analysis. UV-VIS spectroscopy quantified ᶫ-leucine release from the particles in aqueous solution. Cytotoxicity studies using the HeLa cell model showed that the original particles were somewhat toxic, but ᶫ-leucine loading ameliorated the toxic effects, likely due to signaling properties of the amino acid.

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Hydrothermal synthesis of gold nanoparticles and metal organic framework hybrid structure

Science and Technology Development Journal - Natural Sciences ◽

10.32508/stdjns.v2i2.740 ◽

2019 ◽

Vol 2 (2) ◽

pp. 95-101

Author(s):

Hien Thi Thu Nguyen ◽

Hai Thi Le ◽

Trang Thi Minh Nguyen ◽

Hien Minh Nguyen ◽

Thi Tan Pham

Keyword(s):

Gold Nanoparticles ◽

Hydrothermal Synthesis ◽

Diffuse Reflectance ◽

Au Nanoparticles ◽

Metal Organic Framework ◽

Hybrid Structure ◽

Vis Spectroscopy ◽

Metal Organic ◽

Transmission Microscope ◽

Organic Framework

We report a hydrothermal synthesis of a hybrid structure between gold nanoparticles and a metal organic framework, ZIF-8 (abbreviated as Au@ZIF-8). Au nanoparticles encapsulated in polyvinylpyrrolidone (PVP) was employed as seeds to grow the framework of ZIF-8. We controlled the position and concentrations of Au nanoparticles on ZIF-8 crystal by adjusting the volume of Au nanoparticles dissolved in DI water during the growth of ZIF-8. Morphology, structure, distribution of the hybrid structure were investigated by transmission microscope, powder xray diffraction, and diffuse reflectance UV-Vis spectroscopy. We tested out catalytic properties of Au@ZIF-8 through the reaction of 2-nitrophenol and NaBH4.

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Ultrasensitive, rapid and selective sensing of hazardous fluoride ion in aqueous solution using a zirconium porphyrinic luminescent metal-organic framework

Analytica Chimica Acta ◽

10.1016/j.aca.2020.11.007 ◽

2020 ◽

Author(s):

Beining Chen ◽

Tingting Jiang ◽

Heyun Fu ◽

Xiaolei Qu ◽

Zhaoyi Xu ◽

...

Keyword(s):

Aqueous Solution ◽

Metal Organic Framework ◽

Fluoride Ion ◽

Metal Organic ◽

Organic Framework

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Water Photo-Electrooxidation Using Mats of TiO2 Nanorods, Surface Sensitized by a Metal–Organic Framework of Nickel and 1,2-Benzene Dicarboxylic Acid

Hydrogen ◽

10.3390/hydrogen2010004 ◽

2021 ◽

Vol 2 (1) ◽

pp. 58-75

Author(s):

Sheng-Mu You ◽

Waleed M. A. El Rouby ◽

Loïc Assaud ◽

Ruey-An Doong ◽

Pierre Millet

Keyword(s):

Dicarboxylic Acid ◽

Electrochemical Impedance ◽

Metal Organic Framework ◽

Linear Sweep Voltammetry ◽

Tio2 Nanorods ◽

Tem Analysis ◽

Vis Spectroscopy ◽

Metal Organic ◽

Benzene Dicarboxylic Acid ◽

Organic Framework

Photoanodes comprising a transparent glass substrate coated with a thin conductive film of fluorine-doped tin oxide (FTO) and a thin layer of a photoactive phase have been fabricated and tested with regard to the photo-electro-oxidation of water into molecular oxygen. The photoactive layer was made of a mat of TiO2 nanorods (TDNRs) of micrometric thickness. Individual nanorods were successfully photosensitized with nanoparticles of a metal–organic framework (MOF) of nickel and 1,2-benzene dicarboxylic acid (BDCA). Detailed microstructural information was obtained from SEM and TEM analysis. The chemical composition of the active layer was determined by XRD, XPS and FTIR analysis. Optical properties were determined by UV–Vis spectroscopy. The water photooxidation activity was evaluated by linear sweep voltammetry and the robustness was assessed by chrono-amperometry. The OER (oxygen evolution reaction) photo-activity of these photoelectrodes was found to be directly related to the amount of MOF deposited on the TiO2 nanorods, and was therefore maximized by adjusting the MOF content. The microscopic reaction mechanism which controls the photoactivity of these photoelectrodes was analyzed by photo-electrochemical impedance spectroscopy. Microscopic rate parameters are reported. These results contribute to the development and characterization of MOF-sensitized OER photoanodes.

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Modeling of removal of an organophosphorus pesticide from aqueous solution by amagnetic metal-organic framework composite

Chinese Journal of Chemical Engineering ◽

10.1016/j.cjche.2020.09.072 ◽

2021 ◽

Author(s):

Abdolraouf Samadi-Maybodi ◽

Mohsen Nikou

Keyword(s):

Aqueous Solution ◽

Metal Organic Framework ◽

Organophosphorus Pesticide ◽

Metal Organic ◽

Organic Framework

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Efficient Removal of Pb(II) and Co(II) Ions from Aqueous Solution with a Chromium-Based Metal–Organic Framework/Activated Carbon Composites

Industrial & Engineering Chemistry Research ◽

10.1021/acs.iecr.0c06199 ◽

2021 ◽

Vol 60 (11) ◽

pp. 4332-4341

Author(s):

Hossein Shahriyari Far ◽

Mahdi Hasanzadeh ◽

Mina Najafi ◽

Targol Rahimi Masale Nezhad ◽

Mahboubeh Rabbani

Keyword(s):

Aqueous Solution ◽

Activated Carbon ◽

Metal Organic Framework ◽

Carbon Composites ◽

Efficient Removal ◽

Metal Organic ◽

Organic Framework

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Metal-Organic Framework Transistors for Dopamine Sensing

Materials Chemistry Frontiers ◽

10.1039/d1qm00118c ◽

2021 ◽

Author(s):

Jiajun Song ◽

Jianzhong Zheng ◽

Anneng Yang ◽

Hong Liu ◽

Zeyu Zhao ◽

...

Keyword(s):

Charge Transport ◽

Transport Properties ◽

Metal Organic Framework ◽

Metal Organic Frameworks ◽

High Porosity ◽

Two Dimensional ◽

Metal Organic ◽

Organic Framework

Two-dimensional (2D) conductive metal-organic frameworks (MOFs) can not only inherit the high porosity and tailorability of traditional MOFs but also exhibit unique charge transport properties, offering promising opportunities for applications...

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Removal of lead ions from aqueous solution using new magnetic metal-organic framework

Environmental Technology ◽

10.1080/09593330.2021.1925747 ◽

2021 ◽

pp. 1-30

Author(s):

Homeira Nasiri ◽

Farshad Yazdani ◽

Jalal Zeinali ◽

Hamid Reza Mortaheb

Keyword(s):

Aqueous Solution ◽

Metal Organic Framework ◽

Lead Ions ◽

Magnetic Metal ◽

Metal Organic ◽

Organic Framework

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Vacuum-Free and Highly Dense Nanoparticle Based Low-Band-Gap CuInSe2 Thin-Films Manufactured by Face-to-Face Annealing with Application of Uniaxial Mechanical Pressure

Coatings ◽

10.3390/coatings9080484 ◽

2019 ◽

Vol 9 (8) ◽

pp. 484

Author(s):

Matthias Schuster ◽

Dominik Stapf ◽

Tobias Osterrieder ◽

Vincent Barthel ◽

Peter J. Wellmann

Keyword(s):

Thin Films ◽

Band Gap ◽

Coarse Grained ◽

High Porosity ◽

Low Band Gap ◽

Seeding Layer ◽

X Ray ◽

Face To Face ◽

Copper Indium ◽

Vis Spectroscopy

Copper indium gallium sulfo-selenide (CIGS) based solar cells show the highest conversion efficiencies among all thin-film photovoltaic competition. However, the absorber material manufacturing is in most cases dependent on vacuum-technology like sputtering and evaporation, and the use of toxic and environmentally harmful substances like H2Se. In this work, the goal to fabricate dense, coarse grained CuInSe2 (CISe) thin-films with vacuum-free processing based on nanoparticle (NP) precursors was achieved. Bimetallic copper-indium, elemental selenium and binary selenide (Cu2−xSe and In2Se3) NPs were synthesized by wet-chemical methods and dispersed in nontoxic solvents. Layer-stacks from these inks were printed on molybdenum coated float-glass-substrates via doctor-blading. During the temperature treatment, a face-to-face technique and mechanically applied pressure were used to transform the precursor-stacks into dense CuInSe2 films. By combining liquid phase sintering and pressure sintering, and using a seeding layer later on, issues like high porosity, oxidation, or selenium- and indium-depletion were overcome. There was no need for external Se atmosphere or H2Se gas, as all of the Se was directly in the precursor and could not leave the face-to-face sandwich. All thin-films were characterized with scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), and UV/vis spectroscopy. Dense CISe layers with a thickness of about 2–3 µm and low band gap energies of 0.93–0.97 eV were formed in this work, which show potential to be used as a solar cell absorber.

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