Efficient adsorption H3AsO4 and Cr(VI) from strongly acidic solutions by La-Zr bimetallic MOFs: Crystallinity role and mechanism

Han, Cuiping; Xie, Jun; Min, Xize

doi:10.1016/j.jece.2022.108982

Cited by 14 publications

(2 citation statements)

References 60 publications

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“…Based on these findings and previous results on adsorption, we hypothesised that As(V) attaches to the adsorbent through La-O-As and Zr-O-As bonds. 41,68 The adsorption of arsenic by MM-La/Zr-BDC-4 is chemisorption, consistent with previous adsorption results for kinetic modelling of adsorption.…”

Section: Adsorption Mechanismsupporting

confidence: 88%

Efficient arsenate capture using mixed-metal La/Zr-MOF internal complexation

Huang,

Qi,

Duan

et al. 2024

New J. Chem.

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Section: Adsorption Mechanismsupporting

confidence: 88%

Efficient arsenate capture using mixed-metal La/Zr-MOF internal complexation

Huang,

Qi,

Duan

et al. 2024

New J. Chem.

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“…This method integrates the advantages of two metals to achieve intensified synergism of adsorption and photocatalytic degradation with shorter reaction times and the promotion of high-dimensional MOF structures compared to synthesis at room temperature. However, this approach generates a large amount of solvent waste and is potentially hazardous when handling metal salts in the presence of organic liquids [41]. Adapted with permission from Ref.…”

Section: Hydrothermal/solvothermal Methodsmentioning

confidence: 99%

Synthesis and Peroxide Activation Mechanism of Bimetallic MOF for Water Contaminant Degradation: A Review

et al. 2023

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Metal–organic framework (MOF) materials possess a large specific surface area, high porosity, and atomically dispersed metal active sites, which confer excellent catalytic performance as peroxide (peroxodisulfate (PDS), peroxomonosulfate (PMS), and hydrogen peroxide (H2O2)) activation catalysts. However, the limited electron transfer characteristics and chemical stability of traditional monometallic MOFs restrict their catalytic performance and large-scale application in advanced oxidation reactions. Furthermore, the single-metal active site and uniform charge density distribution of monometallic MOFs result in a fixed activation reaction path of peroxide in the Fenton-like reaction process. To address these limitations, bimetallic MOFs have been developed to improve catalytic activity, stability, and reaction controllability in peroxide activation reactions. Compared with monometallic MOFs, bimetallic MOFs enhance the active site of the material, promote internal electron transfer, and even alter the activation path through the synergistic effect of bimetals. In this review, we systematically summarize the preparation methods of bimetallic MOFs and the mechanism of activating different peroxide systems. Moreover, we discuss the reaction factors that affect the process of peroxide activation. This report aims to expand the understanding of bimetallic MOF synthesis and their catalytic mechanisms in advanced oxidation processes.

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Arsenic Adsorption in Subunits of Metal‐Organic Frameworks—A DFT Approach to Assist Water Treatment

de Oliveira,

Leite,

Parreiras

et al. 2024

ChemistrySelect

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The removal of arsenic compounds from water is classified as an urgent concern by the World Health Organization, since many of these species are hazardous to human health. However, the conventional water treatments are not able to extract them, which makes the development of new methodologies of arsenic removal noteworthy. The application of metal‐organic frameworks (MOFs) as adsorbents to attend this purpose is very promising, because these materials can be intelligently built for the desired application. In this work, the performance of common subunits usually found in MOFs were individually evaluated for the adsorption of some arsenic species through computer simulations based on density functional theory (DFT). Thus, important information at molecular level was obtained, which can assist the design of an optimized adsorbent. Three factors were identified to strengthen the adsorption: ionic coordinate bond, hydrogen bonds, and cycle formation. Furthermore, the evaluated subunits showed to be proper for the removal of HAsO2, once the change in the Gibbs free energy was up to −30.8 kcal mol−1. The comparison with possible coexistent species showed that Cl−, , and can interfere with adsorptive process depending on the MOF composition and on the arsenic species to be removed from water.

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Efficient adsorption H3AsO4 and Cr(VI) from strongly acidic solutions by La-Zr bimetallic MOFs: Crystallinity role and mechanism

Cited by 14 publications

References 60 publications

Efficient arsenate capture using mixed-metal La/Zr-MOF internal complexation

Efficient arsenate capture using mixed-metal La/Zr-MOF internal complexation

Synthesis and Peroxide Activation Mechanism of Bimetallic MOF for Water Contaminant Degradation: A Review

Arsenic Adsorption in Subunits of Metal‐Organic Frameworks—A DFT Approach to Assist Water Treatment

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