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Reversible in situ precipitation: a flow-through approach for coating macroporous supports with metal hydroxides

Kumar, Sudesh LU ; Önnby, Linda LU and Kirsebom, Harald LU (2014) In Journal of Materials Chemistry A 2(4). p.1076-1084
Abstract
In this study we report on the production of metal-hydroxide-coated macroporous polymers (MHCMPs), which mainly involves a polyacrylamide backbone coated with iron-aluminium double hydroxides. The coating process is fast, occurs using relatively mild reagents at room temperature, and can be repeated multiple times, thus making it a very simple and flexible process. Electron microscopy and energy dispersive X-ray spectroscopy studies showed that metal hydroxide coating occurred throughout the polymer backbone. It was shown that the mass of metal hydroxides incorporated in the MHCMPs could be adjusted by varying the initial salt solution concentration or the number of cycles in the process. Under the studied conditions, on a polymer backbone... (More)
In this study we report on the production of metal-hydroxide-coated macroporous polymers (MHCMPs), which mainly involves a polyacrylamide backbone coated with iron-aluminium double hydroxides. The coating process is fast, occurs using relatively mild reagents at room temperature, and can be repeated multiple times, thus making it a very simple and flexible process. Electron microscopy and energy dispersive X-ray spectroscopy studies showed that metal hydroxide coating occurred throughout the polymer backbone. It was shown that the mass of metal hydroxides incorporated in the MHCMPs could be adjusted by varying the initial salt solution concentration or the number of cycles in the process. Under the studied conditions, on a polymer backbone of mass 25 mg, we observed a maximum metal hydroxide mass incorporation of 18 mg for the MHCMPs produced at 6 cycles by using 0.4 M iron and aluminium salt solution. Nitrogen adsorption isotherms indicated that the surface area of the MHCMPs increased linearly with the increase in the mass of metal hydroxides incorporated. The polymer backbone with no mass incorporated showed a BET surface area of 18 m(2) g(-1) and the MHCMPs with maximum mass incorporation under the studied conditions showed a BET surface area of 63 m(2) g(-1). MHCMPs with varying mass incorporations were applied for arsenic (As(III)) adsorption and showed a high As(III) removal, indicating that they can serve as potential adsorbents. In addition, MHCMPs incorporated with other metal hydroxides were also produced and characterized to show that this method is applicable for coating these as well. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Materials Chemistry A
volume
2
issue
4
pages
1076 - 1084
publisher
Royal Society of Chemistry
external identifiers
  • wos:000328886800028
  • scopus:84890824118
ISSN
2050-7488
DOI
10.1039/c3ta13307a
language
English
LU publication?
yes
id
71362a6f-9165-4d45-bea3-00d9b4eb0d10 (old id 4255876)
date added to LUP
2014-02-10 13:21:59
date last changed
2017-04-23 03:06:41
@article{71362a6f-9165-4d45-bea3-00d9b4eb0d10,
  abstract     = {In this study we report on the production of metal-hydroxide-coated macroporous polymers (MHCMPs), which mainly involves a polyacrylamide backbone coated with iron-aluminium double hydroxides. The coating process is fast, occurs using relatively mild reagents at room temperature, and can be repeated multiple times, thus making it a very simple and flexible process. Electron microscopy and energy dispersive X-ray spectroscopy studies showed that metal hydroxide coating occurred throughout the polymer backbone. It was shown that the mass of metal hydroxides incorporated in the MHCMPs could be adjusted by varying the initial salt solution concentration or the number of cycles in the process. Under the studied conditions, on a polymer backbone of mass 25 mg, we observed a maximum metal hydroxide mass incorporation of 18 mg for the MHCMPs produced at 6 cycles by using 0.4 M iron and aluminium salt solution. Nitrogen adsorption isotherms indicated that the surface area of the MHCMPs increased linearly with the increase in the mass of metal hydroxides incorporated. The polymer backbone with no mass incorporated showed a BET surface area of 18 m(2) g(-1) and the MHCMPs with maximum mass incorporation under the studied conditions showed a BET surface area of 63 m(2) g(-1). MHCMPs with varying mass incorporations were applied for arsenic (As(III)) adsorption and showed a high As(III) removal, indicating that they can serve as potential adsorbents. In addition, MHCMPs incorporated with other metal hydroxides were also produced and characterized to show that this method is applicable for coating these as well.},
  author       = {Kumar, Sudesh and Önnby, Linda and Kirsebom, Harald},
  issn         = {2050-7488},
  language     = {eng},
  number       = {4},
  pages        = {1076--1084},
  publisher    = {Royal Society of Chemistry},
  series       = {Journal of Materials Chemistry A},
  title        = {Reversible in situ precipitation: a flow-through approach for coating macroporous supports with metal hydroxides},
  url          = {http://dx.doi.org/10.1039/c3ta13307a},
  volume       = {2},
  year         = {2014},
}