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Transition Metal Chelated Biopolymer Coated Mesoporous Silica Nanoparticles as Highly Efficient, Stable, and Recyclable Nanocatalysts for Catalytic Bleaching
Author(s) -
Yurdakul Merve,
Oktem Huseyin Avni,
Yilmaz M Deniz
Publication year - 2019
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201803783
Subject(s) - nanomaterial based catalyst , catalysis , mesoporous silica , nanoparticle , materials science , chelation , chemical engineering , transition metal , mesoporous material , chemistry , nanotechnology , organic chemistry , metallurgy , engineering
The role of catalysts in the development of improved bleaching methods is of paramount scientific and industrial importance in the bleaching of raw cotton and laundry stains. Despite tremendous efforts, developing novel earth abundant metal nanocatalysts with high activity and stability remains a great challenge. Here, we demonstrate the successful formation of earth abundant transition metal‐chelated layer‐by‐layer hyaluronic acid/chitosan polyelectrolyte‐coated mesoporous silica nanoparticles (Metal@PEM‐MSNPs) as novel bleaching nanocatalysts. Metal@PEM‐MSNPs have been tested for both the oxidative degradation of a natural plant dye in solution and tea‐ and beetroot‐ stains on cotton fabrics. While manganese and iron‐chelated PEM‐MSNPs (Mn 2+ @PEM‐MSNPs and Fe 2+ @PEM‐MSNPs) have little catalytic activity, cobalt‐chelated PEM‐MSNPs (Co 2+ @PEM‐MSNPs) display an unexpected, surprisingly high activity in the oxidation reaction under the same experimental conditions. The results suggest that Co 2+ @PEM‐MSNPs are excellent nanocatalytic systems for the low temperature bleaching (<30 0 C) and the design strategy used in Metal@PEM‐MSNP nanocatalysts can further be extended to prepare a wide range of highly active self‐assembled bio‐inspired nanocatalysts for catalytic bleaching and other organic transformations.