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

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...

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Autores principales:	Michael Meistelman, Dan Meyerstein, Ariela Burg, Dror Shamir, Yael Albo
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	nickel nitrobenzene catalysis reduction sol-gel Chemical technology TP1-1185 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/843fbed3bbc94b2391bf637e56cadd68
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spelling	oai:doaj.org-article:843fbed3bbc94b2391bf637e56cadd682021-11-25T17:06:42Z“Doing More with Less”: Ni(II)@ORMOSIL, a Novel Sol-Gel Pre-Catalyst for the Reduction of Nitrobenzene10.3390/catal111113912073-4344https://doaj.org/article/843fbed3bbc94b2391bf637e56cadd682021-11-01T00:00:00Zhttps://www.mdpi.com/2073-4344/11/11/1391https://doaj.org/toc/2073-4344Reduction of nitrobenzene with NaBH<sub>4</sub> using zero-valent iron nanoparticles (ZVI-NPs) and NiCl<sub>2</sub>∙6H<sub>2</sub>O 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<sup>+</sup> of the ORMOSIL matrix with Ni<sup>II</sup>. Ni(II)@ORMOSIL is a pre-catalyst that undergoes reduction by NaBH<sub>4</sub> by an in-situ reaction and promotes nitrobenzene reduction by the unconsumed NaBH<sub>4</sub>, 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.Michael MeistelmanDan MeyersteinAriela BurgDror ShamirYael AlboMDPI AGarticlenickelnitrobenzenecatalysisreductionsol-gelChemical technologyTP1-1185ChemistryQD1-999ENCatalysts, Vol 11, Iss 1391, p 1391 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	nickel nitrobenzene catalysis reduction sol-gel Chemical technology TP1-1185 Chemistry QD1-999
spellingShingle	nickel nitrobenzene catalysis reduction sol-gel Chemical technology TP1-1185 Chemistry QD1-999 Michael Meistelman Dan Meyerstein Ariela Burg Dror Shamir Yael Albo “Doing More with Less”: Ni(II)@ORMOSIL, a Novel Sol-Gel Pre-Catalyst for the Reduction of Nitrobenzene
description	Reduction of nitrobenzene with NaBH<sub>4</sub> using zero-valent iron nanoparticles (ZVI-NPs) and NiCl<sub>2</sub>∙6H<sub>2</sub>O 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<sup>+</sup> of the ORMOSIL matrix with Ni<sup>II</sup>. Ni(II)@ORMOSIL is a pre-catalyst that undergoes reduction by NaBH<sub>4</sub> by an in-situ reaction and promotes nitrobenzene reduction by the unconsumed NaBH<sub>4</sub>, 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.
format	article
author	Michael Meistelman Dan Meyerstein Ariela Burg Dror Shamir Yael Albo
author_facet	Michael Meistelman Dan Meyerstein Ariela Burg Dror Shamir Yael Albo
author_sort	Michael Meistelman
title	“Doing More with Less”: Ni(II)@ORMOSIL, a Novel Sol-Gel Pre-Catalyst for the Reduction of Nitrobenzene
title_short	“Doing More with Less”: Ni(II)@ORMOSIL, a Novel Sol-Gel Pre-Catalyst for the Reduction of Nitrobenzene
title_full	“Doing More with Less”: Ni(II)@ORMOSIL, a Novel Sol-Gel Pre-Catalyst for the Reduction of Nitrobenzene
title_fullStr	“Doing More with Less”: Ni(II)@ORMOSIL, a Novel Sol-Gel Pre-Catalyst for the Reduction of Nitrobenzene
title_full_unstemmed	“Doing More with Less”: Ni(II)@ORMOSIL, a Novel Sol-Gel Pre-Catalyst for the Reduction of Nitrobenzene
title_sort	“doing more with less”: ni(ii)@ormosil, a novel sol-gel pre-catalyst for the reduction of nitrobenzene
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/843fbed3bbc94b2391bf637e56cadd68
work_keys_str_mv	AT michaelmeistelman doingmorewithlessniiiormosilanovelsolgelprecatalystforthereductionofnitrobenzene AT danmeyerstein doingmorewithlessniiiormosilanovelsolgelprecatalystforthereductionofnitrobenzene AT arielaburg doingmorewithlessniiiormosilanovelsolgelprecatalystforthereductionofnitrobenzene AT drorshamir doingmorewithlessniiiormosilanovelsolgelprecatalystforthereductionofnitrobenzene AT yaelalbo doingmorewithlessniiiormosilanovelsolgelprecatalystforthereductionofnitrobenzene
_version_	1718412724695728128

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

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