Sonochemical synthesis of Zr-fumaric based metal-organic framework (MOF) and its performance evaluation in methyl violet
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Sonochemical synthesis of Zr-fumaric based metal-organic framework (MOF) and its performance evaluation in methyl violet 2B decolorization by photocatalysis Meryem Saidi1 · Amina Benomara1 · Malika Mokhtari1 · Leila Boukli‑Hacene1 Received: 27 August 2020 / Accepted: 18 October 2020 / Published online: 29 October 2020 © Akadémiai Kiadó, Budapest, Hungary 2020
Abstract Zr-fumaric based metal-organic framework (MOF) was successfully sonochemically synthesized and characterized by powder X-ray diffraction (PXRD), Brunauer– Emmett–Teller (BET) surface area analysis, thermogravimetric analysis (TGA) and scanning electron microscopy (SEM). The photocatalytic degradation of Methyl Violet 2B (MV2B) using Zr-fum MOF under UV light irradiation was investigated and showed satisfactory results. A catalytic mechanism is proposed in terms of the conduction band (CB) and valence band (VB) gap and the associated light-induced transition. The results showed that the studied MOF-based photocatalyst exhibit 90% photocatalytic efficiency for the degradation of the organic pollutant. Keywords Zr-fum MOF · Sonochemistry · Photocatalysis · Methyl violet 2B
Introduction Water is undeniably the most important natural resource, not only for human beings but for flora and fauna as well. Taking care of it became of great challenge, since the rapid expansion of industry and consequently the increase of wastewater. Toxic waste like dyes, generated by textile, cosmetics, paper, food industries, etc., are carcinogenic, chemically stable, and non-biodegradable [1]. It is, therefore, essential to eliminate them to remedy this serious worldwide environment issue. Many works have been carried out in the treatment of wastewater by techniques such as chemical treatment, adsorption, and photocatalysis which remains, by far the most advantageous and most efficient method in the decomposition of pollutants in less toxic products [2].
* Leila Boukli‑Hacene leila.bouklihacene@univ‑tlemcen.dz 1
Laboratory of Inorganic Chemistry and Environment, University of Abou Bekr Belkaid, Tlemcen, Algeria
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Reaction Kinetics, Mechanisms and Catalysis (2020) 131:1009–1021
However, the effectiveness of heterogeneous photocatalytic processes of pollutants degradation can sometimes be reduced by the corrosion of the catalysts under lighting in aqueous solution [3]. To overcome this problem, it would be judicious to seek for new efficient photocatalysts. Metal-organic frameworks (MOFs), an innovative category of crystalline porous materials based on metal ions connected by organic linkers, have gained a lot of interest in photocatalytic degradation of organic contaminants [4–8], due to their high surface area, large pore volume and good thermal stability [9, 10]. These special properties have allowed MOFs to be applied in adsorption [11–14], catalysis and photocatalysis [15–19], separation [20–22], gas storage [23–26], electrochemistry, fluorescence, etc. [27–30]. Among the first MOFs to be tested as photocatalyst is MOF-5, which presents
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