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Rapid fabrication and optimization of silk fibers supported and stabilized MnO2 catalysts

Singh, Manish LU ; Musy, Chris; Dey, Estera S. LU and Dicko, Cedric LU (2017) In Fibers and Polymers 18(9). p.1660-1670
Abstract

We report on the in situ synthesis and stabilization of manganese dioxide (MnO2) onto four different silk yarns (mulberry, tasar, muga and eri silks). A new ultrasound-assisted procedure was used to reduce permanganate (MnO4 ) and yielded MnO2 nanoparticles (NPs) on/in the different silk fibers. Using a factorial design we assessed the influence of the silk type, manganese precursor concentration, sonication time, and temperature. The results indicated no measurable effect of the process parameters on the silk structures, but significant correlation with the rate of degradation of methylene blue (MB) and the fraction of permanganate consumed. Further optimization of the factorial... (More)

We report on the in situ synthesis and stabilization of manganese dioxide (MnO2) onto four different silk yarns (mulberry, tasar, muga and eri silks). A new ultrasound-assisted procedure was used to reduce permanganate (MnO4 ) and yielded MnO2 nanoparticles (NPs) on/in the different silk fibers. Using a factorial design we assessed the influence of the silk type, manganese precursor concentration, sonication time, and temperature. The results indicated no measurable effect of the process parameters on the silk structures, but significant correlation with the rate of degradation of methylene blue (MB) and the fraction of permanganate consumed. Further optimization of the factorial model identified the optimal process conditions for each silks: mulberry (150 min sonication, 20 mM permanganate), eri (360 min, 10 mM), tasar (150 min, 10 mM) and Muga (20 min, 10 mM). The operational stability (successive catalysis) of the optimum hybrids showed good performance over 5 cycles and most importantly reduced direct dye absorption relatively to dye oxidation. Overall, we found that all silks could template the formation and stabilization of different MnO2 polymorphs and yielded catalytic instead of stoichiometric hybrid fibers.

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Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Catalytic fibers, Hybrid materials, Manganese dioxide nanoparticles, Silk fibers, Sonication
in
Fibers and Polymers
volume
18
issue
9
pages
11 pages
publisher
Korean Fiber Soc.
external identifiers
  • scopus:85029910908
  • wos:000411872200005
ISSN
1229-9197
DOI
10.1007/s12221-017-7160-5
language
English
LU publication?
yes
id
7e536241-8cec-47ea-8354-bc08153bc918
date added to LUP
2017-10-05 14:58:12
date last changed
2018-01-16 13:21:06
@article{7e536241-8cec-47ea-8354-bc08153bc918,
  abstract     = {<p>We report on the in situ synthesis and stabilization of manganese dioxide (MnO<sub>2</sub>) onto four different silk yarns (mulberry, tasar, muga and eri silks). A new ultrasound-assisted procedure was used to reduce permanganate (MnO<sub>4</sub>         <sup>−</sup>) and yielded MnO<sub>2</sub> nanoparticles (NPs) on/in the different silk fibers. Using a factorial design we assessed the influence of the silk type, manganese precursor concentration, sonication time, and temperature. The results indicated no measurable effect of the process parameters on the silk structures, but significant correlation with the rate of degradation of methylene blue (MB) and the fraction of permanganate consumed. Further optimization of the factorial model identified the optimal process conditions for each silks: mulberry (150 min sonication, 20 mM permanganate), eri (360 min, 10 mM), tasar (150 min, 10 mM) and Muga (20 min, 10 mM). The operational stability (successive catalysis) of the optimum hybrids showed good performance over 5 cycles and most importantly reduced direct dye absorption relatively to dye oxidation. Overall, we found that all silks could template the formation and stabilization of different MnO<sub>2</sub> polymorphs and yielded catalytic instead of stoichiometric hybrid fibers.</p>},
  author       = {Singh, Manish and Musy, Chris and Dey, Estera S. and Dicko, Cedric},
  issn         = {1229-9197},
  keyword      = {Catalytic fibers,Hybrid materials,Manganese dioxide nanoparticles,Silk fibers,Sonication},
  language     = {eng},
  month        = {09},
  number       = {9},
  pages        = {1660--1670},
  publisher    = {Korean Fiber Soc.},
  series       = {Fibers and Polymers},
  title        = {Rapid fabrication and optimization of silk fibers supported and stabilized MnO<sub>2</sub> catalysts},
  url          = {http://dx.doi.org/10.1007/s12221-017-7160-5},
  volume       = {18},
  year         = {2017},
}