Abstract
We investigate the adsorption behavior of methyl orange (MO) on composite xerogels. Mesoporous TiO2-SiO2 and TiO2-Si O2-Al2O3 xerogels are prepared by hydrolysis of tetraethyl orthosilicate (TEOS), tetrabutyl orthotitanate (TBOT), and AlCl3 · 6H2O using HCl as a catalyst and cetyltrimethylammonium bromide (CTAB) as a templating agent. The corresponding microporous xerogels are also prepared without addition of CTAB. These xerogels are then characterized by XRD, FTIR, and BET. We find that MO is adsorbed by the mesoporous xerogels in acidic solutions, showing Langmuir type adsorption isotherms. We also find that the adsorption decreases with increasing temperature. It is suggested that adsorption exhibits a sieve effect and that MO is adsorbed through electrostatic attraction and hydrogen bonding between MO and the xerogels.
| Original language | English |
|---|---|
| Pages (from-to) | 205-212 |
| Number of pages | 8 |
| Journal | Composite Interfaces |
| Volume | 11 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 2004 Jan 1 |
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All Science Journal Classification (ASJC) codes
- Ceramics and Composites
- Physics and Astronomy(all)
- Surfaces, Coatings and Films
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Methyl orange adsorption by microporous and mesoporous TiO2-SiO2 and TiO2-Si O2-Al2O3 composite xerogels. / Wu, Zhijian; Ahn, Ik Sung; Lin, Yanxin; Huang, Liyao; Lan, Xinren; Lee, Kangtaek.
In: Composite Interfaces, Vol. 11, No. 2, 01.01.2004, p. 205-212.Research output: Contribution to journal › Article
TY - JOUR
T1 - Methyl orange adsorption by microporous and mesoporous TiO2-SiO2 and TiO2-Si O2-Al2O3 composite xerogels
AU - Wu, Zhijian
AU - Ahn, Ik Sung
AU - Lin, Yanxin
AU - Huang, Liyao
AU - Lan, Xinren
AU - Lee, Kangtaek
PY - 2004/1/1
Y1 - 2004/1/1
N2 - We investigate the adsorption behavior of methyl orange (MO) on composite xerogels. Mesoporous TiO2-SiO2 and TiO2-Si O2-Al2O3 xerogels are prepared by hydrolysis of tetraethyl orthosilicate (TEOS), tetrabutyl orthotitanate (TBOT), and AlCl3 · 6H2O using HCl as a catalyst and cetyltrimethylammonium bromide (CTAB) as a templating agent. The corresponding microporous xerogels are also prepared without addition of CTAB. These xerogels are then characterized by XRD, FTIR, and BET. We find that MO is adsorbed by the mesoporous xerogels in acidic solutions, showing Langmuir type adsorption isotherms. We also find that the adsorption decreases with increasing temperature. It is suggested that adsorption exhibits a sieve effect and that MO is adsorbed through electrostatic attraction and hydrogen bonding between MO and the xerogels.
AB - We investigate the adsorption behavior of methyl orange (MO) on composite xerogels. Mesoporous TiO2-SiO2 and TiO2-Si O2-Al2O3 xerogels are prepared by hydrolysis of tetraethyl orthosilicate (TEOS), tetrabutyl orthotitanate (TBOT), and AlCl3 · 6H2O using HCl as a catalyst and cetyltrimethylammonium bromide (CTAB) as a templating agent. The corresponding microporous xerogels are also prepared without addition of CTAB. These xerogels are then characterized by XRD, FTIR, and BET. We find that MO is adsorbed by the mesoporous xerogels in acidic solutions, showing Langmuir type adsorption isotherms. We also find that the adsorption decreases with increasing temperature. It is suggested that adsorption exhibits a sieve effect and that MO is adsorbed through electrostatic attraction and hydrogen bonding between MO and the xerogels.
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U2 - 10.1163/156855404322971459
DO - 10.1163/156855404322971459
M3 - Article
VL - 11
SP - 205
EP - 212
JO - Composite Interfaces
JF - Composite Interfaces
SN - 0927-6440
IS - 2
ER -