Composites with macroporous poly(vinyl alcohol) cryogels with attached activated carbon microparticles with controlled accessibility of a surface

Yishan Zheng, Vladimir M. Gun'Ko, Carol A. Howell, Susan R. Sandeman, Gary J. Phillips, Oleksandr P. Kozynchenko, Stephen R. Tennison, Alexander E. Ivanov, Sergey V. Mikhalovsky

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

A set of glutaraldehyde (GA) cross-linked poly(vinyl alcohol)/activated carbon (PVA/GA/AC) composites prepared in the form of monolithic rods using a cryogelation technique and studied using adsorption, mercury porosimetry, scanning electron microscopy (SEM), and quantum chemistry methods display porosity similar to that of PVA/GA cryogel at a high GA content (content ratio GA/AC = 1 and GA/PVA = 0.2). GA cross-linked PVA multilayer coverage is an effective barrier for adsorption on AC particles. Variations in surface chemistry (AC initial and oxidized in air at 300 °C for 12 h) and content (14-62.5%w/w) of ACs in PVA/GA/AC composites relatively weakly affect their textural characteristics at a high GA content (specific surface area S BET <120 m2/g, pore volume Vp <0.35 cm3/g). However, PVA/GA/AC composite rods formed with a lower concentration of GA (content ratio GA/AC = 1/6 and GA/PVA = 1/10) have significantly greater SBET (∼500 m2/g) and V p (>0.55 cm3/g) values because of improved accessibility of the AC surface. This provides better adsorption of methylene blue as a probe compound.

Original languageEnglish
Pages (from-to)5936-5944
Number of pages9
JournalACS Applied Materials and Interfaces
Volume4
Issue number11
DOIs
Publication statusPublished - Nov 28 2012

Fingerprint

Cryogels
Glutaral
Activated carbon
Alcohols
Carbon
Adsorption
Composite materials
Quantum chemistry
Surface chemistry
Specific surface area
Multilayers
Porosity
Scanning electron microscopy
Air
Methylene Blue
Mercury
Electron Scanning Microscopy

Keywords

  • activated carbon
  • adsorption
  • glutaraldehyde cross-linked poly(vinyl alcohol)
  • PVA/AC composites
  • textural characteristics

ASJC Scopus subject areas

  • Materials Science(all)
  • Medicine(all)

Cite this

Zheng, Y., Gun'Ko, V. M., Howell, C. A., Sandeman, S. R., Phillips, G. J., Kozynchenko, O. P., ... Mikhalovsky, S. V. (2012). Composites with macroporous poly(vinyl alcohol) cryogels with attached activated carbon microparticles with controlled accessibility of a surface. ACS Applied Materials and Interfaces, 4(11), 5936-5944. https://doi.org/10.1021/am301577c

Composites with macroporous poly(vinyl alcohol) cryogels with attached activated carbon microparticles with controlled accessibility of a surface. / Zheng, Yishan; Gun'Ko, Vladimir M.; Howell, Carol A.; Sandeman, Susan R.; Phillips, Gary J.; Kozynchenko, Oleksandr P.; Tennison, Stephen R.; Ivanov, Alexander E.; Mikhalovsky, Sergey V.

In: ACS Applied Materials and Interfaces, Vol. 4, No. 11, 28.11.2012, p. 5936-5944.

Research output: Contribution to journalArticle

Zheng, Y, Gun'Ko, VM, Howell, CA, Sandeman, SR, Phillips, GJ, Kozynchenko, OP, Tennison, SR, Ivanov, AE & Mikhalovsky, SV 2012, 'Composites with macroporous poly(vinyl alcohol) cryogels with attached activated carbon microparticles with controlled accessibility of a surface', ACS Applied Materials and Interfaces, vol. 4, no. 11, pp. 5936-5944. https://doi.org/10.1021/am301577c
Zheng, Yishan ; Gun'Ko, Vladimir M. ; Howell, Carol A. ; Sandeman, Susan R. ; Phillips, Gary J. ; Kozynchenko, Oleksandr P. ; Tennison, Stephen R. ; Ivanov, Alexander E. ; Mikhalovsky, Sergey V. / Composites with macroporous poly(vinyl alcohol) cryogels with attached activated carbon microparticles with controlled accessibility of a surface. In: ACS Applied Materials and Interfaces. 2012 ; Vol. 4, No. 11. pp. 5936-5944.
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