High surface area nitrogen-functionalized Ni nanozymes for efficient peroxidase-like catalytic activity.

Nitrogen-functionalization is an effective means of improving the catalytic performances of nanozymes. In the present work, plasma-assisted nitrogen modification of nanocolumnar Ni GLAD films was performed using an ammonia plasma, resulting in an improvement in the peroxidase-like catalytic performa...

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Autores principales:	Anuja Tripathi, Kenneth D Harris, Anastasia L Elias
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/a32d13f225464770a313f64fa2b982fd
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spelling	oai:doaj.org-article:a32d13f225464770a313f64fa2b982fd2021-12-02T20:17:01ZHigh surface area nitrogen-functionalized Ni nanozymes for efficient peroxidase-like catalytic activity.1932-620310.1371/journal.pone.0257777https://doaj.org/article/a32d13f225464770a313f64fa2b982fd2021-01-01T00:00:00Zhttps://doi.org/10.1371/journal.pone.0257777https://doaj.org/toc/1932-6203Nitrogen-functionalization is an effective means of improving the catalytic performances of nanozymes. In the present work, plasma-assisted nitrogen modification of nanocolumnar Ni GLAD films was performed using an ammonia plasma, resulting in an improvement in the peroxidase-like catalytic performance of the porous, nanostructured Ni films. The plasma-treated nanozymes were characterized by TEM, SEM, XRD, and XPS, revealing a nitrogen-rich surface composition. Increased surface wettability was observed after ammonia plasma treatment, and the resulting nitrogen-functionalized Ni GLAD films presented dramatically enhanced peroxidase-like catalytic activity. The optimal time for plasma treatment was determined to be 120 s; when used to catalyze the oxidation of the colorimetric substrate TMB in the presence of H2O2, Ni films subjected to 120 s of plasma treatment yielded a much higher maximum reaction velocity (3.7⊆10-8 M/s vs. 2.3⊆10-8 M/s) and lower Michaelis-Menten coefficient (0.17 mM vs. 0.23 mM) than pristine Ni films with the same morphology. Additionally, we demonstrate the application of the nanozyme in a gravity-driven, continuous catalytic reaction device. Such a controllable plasma treatment strategy may open a new door toward surface-functionalized nanozymes with improved catalytic performance and potential applications in flow-driven point-of-care devices.Anuja TripathiKenneth D HarrisAnastasia L EliasPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 16, Iss 10, p e0257777 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Anuja Tripathi Kenneth D Harris Anastasia L Elias High surface area nitrogen-functionalized Ni nanozymes for efficient peroxidase-like catalytic activity.
description	Nitrogen-functionalization is an effective means of improving the catalytic performances of nanozymes. In the present work, plasma-assisted nitrogen modification of nanocolumnar Ni GLAD films was performed using an ammonia plasma, resulting in an improvement in the peroxidase-like catalytic performance of the porous, nanostructured Ni films. The plasma-treated nanozymes were characterized by TEM, SEM, XRD, and XPS, revealing a nitrogen-rich surface composition. Increased surface wettability was observed after ammonia plasma treatment, and the resulting nitrogen-functionalized Ni GLAD films presented dramatically enhanced peroxidase-like catalytic activity. The optimal time for plasma treatment was determined to be 120 s; when used to catalyze the oxidation of the colorimetric substrate TMB in the presence of H2O2, Ni films subjected to 120 s of plasma treatment yielded a much higher maximum reaction velocity (3.7⊆10-8 M/s vs. 2.3⊆10-8 M/s) and lower Michaelis-Menten coefficient (0.17 mM vs. 0.23 mM) than pristine Ni films with the same morphology. Additionally, we demonstrate the application of the nanozyme in a gravity-driven, continuous catalytic reaction device. Such a controllable plasma treatment strategy may open a new door toward surface-functionalized nanozymes with improved catalytic performance and potential applications in flow-driven point-of-care devices.
format	article
author	Anuja Tripathi Kenneth D Harris Anastasia L Elias
author_facet	Anuja Tripathi Kenneth D Harris Anastasia L Elias
author_sort	Anuja Tripathi
title	High surface area nitrogen-functionalized Ni nanozymes for efficient peroxidase-like catalytic activity.
title_short	High surface area nitrogen-functionalized Ni nanozymes for efficient peroxidase-like catalytic activity.
title_full	High surface area nitrogen-functionalized Ni nanozymes for efficient peroxidase-like catalytic activity.
title_fullStr	High surface area nitrogen-functionalized Ni nanozymes for efficient peroxidase-like catalytic activity.
title_full_unstemmed	High surface area nitrogen-functionalized Ni nanozymes for efficient peroxidase-like catalytic activity.
title_sort	high surface area nitrogen-functionalized ni nanozymes for efficient peroxidase-like catalytic activity.
publisher	Public Library of Science (PLoS)
publishDate	2021
url	https://doaj.org/article/a32d13f225464770a313f64fa2b982fd
work_keys_str_mv	AT anujatripathi highsurfaceareanitrogenfunctionalizedninanozymesforefficientperoxidaselikecatalyticactivity AT kennethdharris highsurfaceareanitrogenfunctionalizedninanozymesforefficientperoxidaselikecatalyticactivity AT anastasialelias highsurfaceareanitrogenfunctionalizedninanozymesforefficientperoxidaselikecatalyticactivity
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High surface area nitrogen-functionalized Ni nanozymes for efficient peroxidase-like catalytic activity.

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