Effective and Green Removal of Trichloroacetic Acid from Disinfected Water

Trabelsi, Keren; Meistelman, Michael; Ciriminna, Rosaria; Albo, Yael; Pagliaro, Mario

doi:10.3390/ma13040827

Cited by 5 publications

(7 citation statements)

References 24 publications

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“…In previous studies of Au o and Ag o nanoparticles incorporated into ORMOSIL matrices, Au-cat and Ag-cat, surface area analysis (BET) was obtained as 428 m 2 /g and 452 m 2 /g, respectively [28,38]. Silversil [39] catalyst composed of 70:30 mole ratio of tetraethoxysilane (TEOS) and methyltriethoxysilane (MTEOS) respectively, resulted in 583 m 2 /g surface area. The surface area of these organically modified silica matrices (ORMOSIL) is highly dependent on their monomer ratio (under the same synthetic procedures) [39].…”

Section: Ni(ii)@ormosil Characterizationmentioning

confidence: 99%

“…Silversil [39] catalyst composed of 70:30 mole ratio of tetraethoxysilane (TEOS) and methyltriethoxysilane (MTEOS) respectively, resulted in 583 m 2 /g surface area. The surface area of these organically modified silica matrices (ORMOSIL) is highly dependent on their monomer ratio (under the same synthetic procedures) [39]. For ZVI@ORMOSIL the synthetic procedure included a 70:30 mole ratio of TEOS and methyltrimethoxysilane (MTMOS) as monomers, exhibiting a surface area of 751 m 2 /g.…”

Section: Ni(ii)@ormosil Characterizationmentioning

confidence: 99%

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“Doing More with Less”: Ni(II)@ORMOSIL, a Novel Sol-Gel Pre-Catalyst for the Reduction of Nitrobenzene

et al. 2021

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Reduction of nitrobenzene with NaBH4 using zero-valent iron nanoparticles (ZVI-NPs) and NiCl2∙6H2O incorporated in organically modified hybrid silica matrices as ZVI@ORMOSIL and Ni(II)@ORMOSIL catalysts is proposed as a remediation strategy. Ni(II)@ORMOSIL is prepared by ion-exchanging H+ of the ORMOSIL matrix with NiII. Ni(II)@ORMOSIL is a pre-catalyst that undergoes reduction by NaBH4 by an in-situ reaction and promotes nitrobenzene reduction by the unconsumed NaBH4, leading to sparing use of the catalyst. Ni(II)@ORMOSIL undergoes color change from green to black in this process, returning to a green hue after washing and drying. Nitrobenzene reductions were examined in aqueous acetonitrile solvent mixtures, and the reduction cascade produced the reaction end-products with catalytic implications. Plausible mechanisms of ZVI@ORMOSIL and Ni(II)@ORMOSIL catalyzed reductions of nitrobenzene are discussed. This work is the first to report M(II)@ORMOSIL pre-catalysts for in-situ reduction of nitrobenzene, and expands the scope of the ORMOSIL series of catalysts for the reduction of polluting compounds. This approach enables the development of catalysts that use very low concentrations of transition metal cations.

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Section: Ni(ii)@ormosil Characterizationmentioning

confidence: 99%

Section: Ni(ii)@ormosil Characterizationmentioning

confidence: 99%

“Doing More with Less”: Ni(II)@ORMOSIL, a Novel Sol-Gel Pre-Catalyst for the Reduction of Nitrobenzene

et al. 2021

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“…These processes often require a catalyst [8]. M 0 -nano-particles (M 0 -NPs), e.g., Ag 0 -NPs and Au 0 -NPs [9,10], are often used as catalysts for these processes [11][12][13][14], thus enabling the reduction of these compounds to their non-toxic or less toxic and environmentally friendly products.…”

Section: Introductionmentioning

confidence: 99%

Reductive Dechlorination of Chloroacetamides with NaBH4 Catalyzed by Zero Valent Iron, ZVI, Nanoparticles in ORMOSIL Matrices Prepared via the Sol-Gel Route

et al. 2020

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The efficient reductive dechlorination, as remediation of dichloroacetamide and monochloroacetamide, toxic and abundant pollutants, using sodium borohydride catalyzed by zero valent iron nanoparticles (ZVI-NPs), entrapped in organically modified hybrid silica matrices prepared via the sol-gel route, ZVI@ORMOSIL, is demonstrated. The results indicate that the extent of the dechlorination reaction depends on the nature of the substrate and on the reaction medium. By varying the amount of catalyst or reductant in the reaction it was possible to obtain conditions for full dechlorination of these pollutants to nontoxic acetamide and acetic acid. A plausible mechanism of the catalytic process is discussed. The present work expands the scope of ZVI-NP catalyzed reduction of polluting compounds, first reports the catalytic parameters of chloroacetamide reduction, and offers additional insight into the heterogeneous catalyst structure of M0@ORMOSIL sol-gel. The ZVI@ORMOSIL catalyst is ferromagnetic and hence can be recycled easily.

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“…From cycloaddition and cyclization through fluorination, from C-C cross coupling reactions to reductions and oxidations, catalytic processes mediated by silver(I) complexes and silver nanoparticles (NPs) are numerous and increasingly employed in synthetic organic chemistry [1][2][3][4][5][6][7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

“…Silver(I) is a π-Lewis acid suitable for activation of carbon-carbon multiple bonds [3][4][5]. To absorb visible light, plasmonic resonant silver nanoparticles are used for the photocatalytic activation of O 2 in visible-light oxidations and are a highly promising new means for environmental decontamination, including removal of water disinfection by-products [6].…”

Section: Introductionmentioning

confidence: 99%

Catalysis with Silver: From Complexes and Nanoparticles to MORALs and Single-Atom Catalysts

et al. 2020

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Silver catalysis has a rich and versatile chemistry now expanding from processes mediated by silver complexes and silver nanoparticles to transformations catalyzed by silver metal organic alloys and single-atom catalysts. Focusing on selected recent advances, we identify the key advantages offered by these highly selective heterogeneous catalysts. We conclude by offering seven research and educational guidelines aimed at further progressing the field of new generation silver-based catalytic materials.

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Effective and Green Removal of Trichloroacetic Acid from Disinfected Water

Cited by 5 publications

References 24 publications

“Doing More with Less”: Ni(II)@ORMOSIL, a Novel Sol-Gel Pre-Catalyst for the Reduction of Nitrobenzene

“Doing More with Less”: Ni(II)@ORMOSIL, a Novel Sol-Gel Pre-Catalyst for the Reduction of Nitrobenzene

Reductive Dechlorination of Chloroacetamides with NaBH4 Catalyzed by Zero Valent Iron, ZVI, Nanoparticles in ORMOSIL Matrices Prepared via the Sol-Gel Route

Catalysis with Silver: From Complexes and Nanoparticles to MORALs and Single-Atom Catalysts

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