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 language | English |
|---|---|
| Pages (from-to) | 5936-5944 |
| Number of pages | 9 |
| Journal | ACS Applied Materials and Interfaces |
| Volume | 4 |
| Issue number | 11 |
| DOIs | |
| Publication status | Published - Nov 28 2012 |
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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
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 journal › Article
}
TY - JOUR
T1 - Composites with macroporous poly(vinyl alcohol) cryogels with attached activated carbon microparticles with controlled accessibility of a surface
AU - Zheng, Yishan
AU - Gun'Ko, Vladimir M.
AU - Howell, Carol A.
AU - Sandeman, Susan R.
AU - Phillips, Gary J.
AU - Kozynchenko, Oleksandr P.
AU - Tennison, Stephen R.
AU - Ivanov, Alexander E.
AU - Mikhalovsky, Sergey V.
PY - 2012/11/28
Y1 - 2012/11/28
N2 - 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.
AB - 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.
KW - activated carbon
KW - adsorption
KW - glutaraldehyde cross-linked poly(vinyl alcohol)
KW - PVA/AC composites
KW - textural characteristics
UR - http://www.scopus.com/inward/record.url?scp=84870566158&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84870566158&partnerID=8YFLogxK
U2 - 10.1021/am301577c
DO - 10.1021/am301577c
M3 - Article
VL - 4
SP - 5936
EP - 5944
JO - ACS applied materials & interfaces
JF - ACS applied materials & interfaces
SN - 1944-8244
IS - 11
ER -