Sonication enhances the stability of MnO2 nanoparticles on silk film template for enzyme mimic application
Singh, Manish LU ; Dey, Estera S. LU and Dicko, Cedric LU
(2020)
In Ultrasonics Sonochemistry
64.
- Abstract
- We have developed an in-situ method using sonication (3 mm probe sonicator, 30 W, 20 kHz) and auto-reduction (control) to study the mechanism of the formation of manganese dioxide (MnO2) on a solid template (silk film), and its resulting enzymatic activity on tetramethylbenzidine (TMB) substrate. The fabrication of the silk film was first optimized for stability (no degradation) and optical transparency. A factorial approach was used to assess the effect of sonication time and the initial concentration of potassium permanganate (KMnO4). The result indicated a significant correlation with a fraction of KMnO4 consumed and MnO2 formation. Further, we found that the optimal process conditions to obtain a stable silk film with highly catalytic... (More)
- We have developed an in-situ method using sonication (3 mm probe sonicator, 30 W, 20 kHz) and auto-reduction (control) to study the mechanism of the formation of manganese dioxide (MnO2) on a solid template (silk film), and its resulting enzymatic activity on tetramethylbenzidine (TMB) substrate. The fabrication of the silk film was first optimized for stability (no degradation) and optical transparency. A factorial approach was used to assess the effect of sonication time and the initial concentration of potassium permanganate (KMnO4). The result indicated a significant correlation with a fraction of KMnO4 consumed and MnO2 formation. Further, we found that the optimal process conditions to obtain a stable silk film with highly catalytic MnO2 nanoparticles (NPs) was 30 min of sonication in the presence of 0.5 mM of KMnO4 at a temperature of 20–24 °C. Under the optimal condition, we monitored in-situ the formation of MnO2 on the silk film, and after thorough rinsing, the in-situ catalysis of 0.8 mM of TMB substrate. For control, we used the auto-reduction of KMnO4 onto the silk film after about 16 h. The result from single-wavelength analysis confirmed the different kinetics rates for the formation of MnO2 via sonication and auto-reduction. The result from the multivariate component analysis indicated a three components route for sonication and auto-reduction to form MnO2-Silk. Overall, we found that the smaller size, more mono-dispersed, and deeper buried MnO2 NPs in silk film prepared by sonication, conferred a higher catalytic activity and stability to the hybrid material. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/5f1b2ddf-2cc2-4d58-b347-f162848c5bfc
- author
- Singh, Manish
LU
; Dey, Estera S.
LU
and Dicko, Cedric
LU
- organization
- publishing date
- 2020
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Silk film, Manganese dioxide nanoparticles, In-situ UV–Visible spectroscopy, Sonochemistry, Enzyme mimics
- in
- Ultrasonics Sonochemistry
- volume
- 64
- article number
- 105011
- publisher
- Elsevier
- external identifiers
-
- scopus:85079848043
- pmid:32097868
- ISSN
- 1350-4177
- DOI
- 10.1016/j.ultsonch.2020.105011
- language
- English
- LU publication?
- yes
- id
- 5f1b2ddf-2cc2-4d58-b347-f162848c5bfc
- date added to LUP
- 2020-02-22 12:24:25
- date last changed
- 2022-04-18 20:42:08
@article{5f1b2ddf-2cc2-4d58-b347-f162848c5bfc,
abstract = {{We have developed an in-situ method using sonication (3 mm probe sonicator, 30 W, 20 kHz) and auto-reduction (control) to study the mechanism of the formation of manganese dioxide (MnO2) on a solid template (silk film), and its resulting enzymatic activity on tetramethylbenzidine (TMB) substrate. The fabrication of the silk film was first optimized for stability (no degradation) and optical transparency. A factorial approach was used to assess the effect of sonication time and the initial concentration of potassium permanganate (KMnO4). The result indicated a significant correlation with a fraction of KMnO4 consumed and MnO2 formation. Further, we found that the optimal process conditions to obtain a stable silk film with highly catalytic MnO2 nanoparticles (NPs) was 30 min of sonication in the presence of 0.5 mM of KMnO4 at a temperature of 20–24 °C. Under the optimal condition, we monitored in-situ the formation of MnO2 on the silk film, and after thorough rinsing, the in-situ catalysis of 0.8 mM of TMB substrate. For control, we used the auto-reduction of KMnO4 onto the silk film after about 16 h. The result from single-wavelength analysis confirmed the different kinetics rates for the formation of MnO2 via sonication and auto-reduction. The result from the multivariate component analysis indicated a three components route for sonication and auto-reduction to form MnO2-Silk. Overall, we found that the smaller size, more mono-dispersed, and deeper buried MnO2 NPs in silk film prepared by sonication, conferred a higher catalytic activity and stability to the hybrid material.}},
author = {{Singh, Manish and Dey, Estera S. and Dicko, Cedric}},
issn = {{1350-4177}},
keywords = {{Silk film; Manganese dioxide nanoparticles; In-situ UV–Visible spectroscopy; Sonochemistry; Enzyme mimics}},
language = {{eng}},
publisher = {{Elsevier}},
series = {{Ultrasonics Sonochemistry}},
title = {{Sonication enhances the stability of MnO2 nanoparticles on silk film template for enzyme mimic application}},
url = {{http://dx.doi.org/10.1016/j.ultsonch.2020.105011}},
doi = {{10.1016/j.ultsonch.2020.105011}},
volume = {{64}},
year = {{2020}},
}