Adsorption of Malachite Green and Alizarin Red S Dyes Using Fe-BTC Metal Organic Framework as Adsorbent

Synthetic organic dyes are widely used in various industrial sectors but are also among the most harmful water pollutants. In the last decade, significant efforts have been made to develop improved materials for the removal of dyes from water, in particular, on nanostructured adsorbent materials. Metal organic frameworks (MOFs) are an attractive class of hybrid nanostructured materials with an extremely wide range of applications including adsorption. In the present work, an iron-based Fe-BTC MOF, prepared according to a rapid, aqueous-based procedure, was used as an adsorbent for the removal of alizarin red S (ARS) and malachite green (MG) dyes from water. The synthesized material was characterized in detail, while the adsorption of the dyes was monitored by UV-Vis spectroscopy. An optimal adsorption pH of 4, likely due to the establishment of favorable interactions between dyes and Fe-BTC, was found. At this pH and at a temperature of 298 K, adsorption equilibrium was reached in less than 30 min following a pseudo-second order kinetics, with k″ of 4.29 × 10−3 and 3.98 × 10−2 g∙mg−1 min−1 for ARS and MG, respectively. The adsorption isotherm followed the Langmuir model with maximal adsorption capacities of 80 mg∙g−1 (ARS) and 177 mg∙g−1 (MG), and KL of 9.30·103 L∙mg−1 (ARS) and 51.56·103 L∙mg−1 (MG).

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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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Fluorine-Containing Triazole-Decorated Silver(I)-Based Cationic Metal–Organic Framework for Separating Organic Dyes and Removing Oxoanions from Water

Inorganic Chemistry ◽

10.1021/acs.inorgchem.0c03688 ◽

2021 ◽

Author(s):

Sandeep Kumar ◽

Songyuan Liu ◽

Brij Mohan ◽

Mingjian Zhang ◽

Zhiyu Tao ◽

...

Keyword(s):

Organic Dyes ◽

Metal Organic Framework ◽

Metal Organic ◽

Organic Framework

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A New Multi-Functional Cu(II)-Organic Framework as a Platform for Selective Carbon Dioxide Chemical Fixation and Separation of Organic Dyes

CrystEngComm ◽

10.1039/d1ce01274f ◽

2021 ◽

Author(s):

Yang-Tian Yan ◽

Chen-Yang Wang ◽

Li-Na Zheng ◽

Yun-Long Wu ◽

Jiao Liu ◽

...

Keyword(s):

Carbon Dioxide ◽

Benzoic Acid ◽

Organic Dyes ◽

Metal Organic Framework ◽

Chemical Fixation ◽

Acid Ligand ◽

Metal Organic ◽

Organic Framework

A new multi-functional metal-organic framework, {[Cu2(HL)(H2O)2]·NMP·2H2O}n (1), was assembled employing a asymmetrical V-shaped rigid multicarboxylic acid ligand H5L (H5L= 2,4-di(2′,5′-dicarboxylphenyl)benzoic acid) with Cu(II) ions. 1 possesses a 3D pore formed...

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An organic–inorganic hybrid nanomaterial composed of a Dowson-type (NH4)6P2Mo18O62 heteropolyanion and a metal–organic framework: synthesis, characterization, and application as an effective adsorbent for the removal of organic dyes

RSC Advances ◽

10.1039/d0ra07042d ◽

2020 ◽

Vol 10 (66) ◽

pp. 40005-40018

Author(s):

Akram-Alsadat Hoseini ◽

Saeed Farhadi ◽

Abedin Zabardasti ◽

Firouzeh Siadatnasab

Keyword(s):

Organic Dyes ◽

Metal Organic Framework ◽

Inorganic Hybrid ◽

Hybrid Nanomaterial ◽

Metal Organic ◽

Organic Framework

An MIL-101(Cr) metal–organic framework nanocomposite containing P2Mo18O626− polyanions was prepared and applied as an ultrafast adsorbent to remove organic dyes from water.

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A Zirconium Metal-Organic Framework with SOC Topological Net for Catalytic Peptide Bond Hydrolysis

10.26434/chemrxiv.14472681.v1 ◽

2021 ◽

Author(s):

Sujing Wang ◽

Antoine Tissot ◽

Guillaume Maurin ◽

Tatjana Parac-Vogt ◽

Christian Serre ◽

...

Keyword(s):

Active Sites ◽

Metal Organic Framework ◽

Cost Effective ◽

Peptide Bond ◽

Catalytic Performance ◽

Wide Range ◽

Horse Heart Myoglobin ◽

Metal Organic ◽

Effective Synthesis ◽

Organic Framework

<div>The discovery of nanozymes for selective cleavage of proteins would boost the emerging areas of modern proteomics, however, the development of efficient and reusable artificial catalysts for peptide bond hydrolysis is challenging. Here we report the detailed catalytic properties of a microporous zirconium carboxylate metal-organic framework, MIP-201, in promoting peptide bond hydrolysis in a simple dipeptide, as well as in horse-heart myoglobin (Mb) protein that consists of 153 amino acids. We demonstrate that MIP-201 features an excellent catalytic activity and selectivity, a good tolerance toward reaction conditions covering a wide range of different pH values, and importantly, an exceptional recycling ability associated with easy regeneration process. Taking into account the excellent catalytic performance of MIP-201 and its other advantages such as 6-connected Zr6 cluster active sites, the green, scalable and cost-effective synthesis, and an outstanding chemical and architectural stability, our finding suggests that MIP-201 may be a promising and practical alternative to the current commercially available catalysts for peptide bond hydrolysis.</div>

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A Zirconium Metal-Organic Framework with SOC Topological Net for Catalytic Peptide Bond Hydrolysis

10.26434/chemrxiv.14472681 ◽

2021 ◽

Author(s):

Sujing Wang ◽

Antoine Tissot ◽

Guillaume Maurin ◽

Tatjana Parac-Vogt ◽

Christian Serre ◽

...

Keyword(s):

Active Sites ◽

Metal Organic Framework ◽

Cost Effective ◽

Peptide Bond ◽

Catalytic Performance ◽

Wide Range ◽

Horse Heart Myoglobin ◽

Metal Organic ◽

Effective Synthesis ◽

Organic Framework

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Study of UiO-66 and UiO-66 Modulated with Acetic Acid as the Adsorbent for Eriochrome Black T Dye

Indo J Chem Res ◽

10.30598//ijcr.2021.8-riz ◽

2021 ◽

Vol 8 (3) ◽

pp. 183-193

Author(s):

M. Anugrah Rizky Pambudi ◽

Nanda Prayogo ◽

Muhammad Nadjib ◽

Ratna Ediati

Keyword(s):

Acetic Acid ◽

Reaction Rate ◽

Metal Organic Framework ◽

X Ray Diffraction ◽

Adsorption Selectivity ◽

X Ray ◽

Langmuir Adsorption ◽

Eriochrome Black T ◽

Metal Organic ◽

Pseudo Second Order

UiO-66, as one of the metal-organic framework (MOF) compounds, has been used to treat some anionic and cationic dye waste. In order to determine the adsorption selectivity decisively, the synthesis of UiO-66 and UiO-66 modulated with acetic acid had been carried out, along with their adsorption tests for Eriochrome Black T (EBT) dye solution. The synthesis was performed by utilizing a solvothermal method with the reaction mixtures of zirconium (IV) chloride (ZrCl4) and terephthalic acid (H2BDC) as a ligand heated at 120 oC for 24 hours. Both UiO-66 (without acetic acid) and acetic acid modulated UiO-66 were obtained as a white powder. Acetic acid as a modulator was added and being investigated for the adsorption capability compared to the normal UiO-66. This study showed that normal UiO-66 exhibited better adsorption than acetic acid modulated UiO-66 with a mmol ratio of acetic acid:ligand varied from 50:1, 100:1, and 150:1. Acetic acid modulated UiO-66 with a mmol ratio of 50 exhibited the best crystallinity as observed by using x-ray diffraction. It can be concluded that the adsorption of EBT using normal and acetic acid modulated UiO-66 obeyed the pseudo-second-order reaction rate law as well as the Langmuir adsorption isotherm pattern.

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High-Throughput Electron Diffraction Reveals a Hidden Novel Metal-Organic Framework for Electrocatalysis

10.26434/chemrxiv.13725817.v2 ◽

2021 ◽

Author(s):

Meng Ge ◽

Yanzhi Wang ◽

Francesco Carraro ◽

Weibin Liang ◽

Morteza Roostaeinia ◽

...

Keyword(s):

Electron Diffraction ◽

High Throughput ◽

Metal Organic Framework ◽

Three Dimensional ◽

Reduction Reaction ◽

New Materials ◽

X Ray Diffraction ◽

Zeolitic Imidazolate Framework ◽

Wide Range ◽

Metal Organic

Metal-organic frameworks (MOFs) are known for their versatile combination of inorganic building units and organic linkers, which offers immense opportunities in a wide range of applications. However, many MOFs are typically synthesized as multiphasic polycrystalline powders, which are challenging for studies by X-ray diffraction. Therefore, developing new structural characterization techniques is highly desired in order to accelerate discoveries of new materials. Here, we report a high-throughput approach for structural analysis of MOF nano- and sub-microcrystals by three-dimensional electron diffraction (3DED). A new zeolitic-imidazolate framework (ZIF), denoted ZIF-EC1<a>, </a>was first discovered in a trace amount during the study of a known ZIF-CO3-1 material by 3DED. The structures of both ZIFs were solved and refined using 3DED data. ZIF-EC1 has a dense 3D framework structure, which is built by linking mono- and bi-nuclear Zn clusters and 2-methylimidazolates (mIm-). With a composition of Zn3(mIm)5(OH), ZIF-EC1 exhibits high N and Zn densities. We show that the N-doped carbon material derived from ZIF-EC1 is a promising electrocatalysis for oxygen reduction reaction (ORR). The discovery of this new MOF and its conversion to an efficient electrocatalyst highlights the power of 3DED in developing new materials and their applications.

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