Abstract
The composition of layered alkali titanates (MxTi 2-x/3Lix/3O4; M = K+, Li+ Na+) was tuned to control the swelling of the titanates in water and subsequently achieve molecular-sieve-like molecular recognitive photocatalytic decomposition of aqueous organic compounds on the titanates. Layered potassium lithium titanates with different layer charge density, KxTi 2-x/3Lix/3O4 (x = 0.61, 0.67, and 0.74), was first synthesized and then the interlayer K+ was quantitatively exchanged with Li+ and Na+ to form LixTi 2x-/3- Lix/3O4 (X= 0.61, 0.67, and 0.76) and NaxTi2-x/3Lix/3O4 0.61, 0.67, and 0.76). The water adsorption/ desorption isotherms and X-ray diffraction patterns of the titanates revealed that the pristine K-type titanates hardly hydrated, while the Li+- and Na+-exchanged titanates expanded the interlayer space upon the hydration and the degree in the hydration was larger for the Na forms than for the Li ones and depended on the layer charge density. The present titanates were found to selectively adsorb benzene from an aqueous mixture of benzene, phenol, and 4-butylphenol and subsequently decompose benzene upon UV irradiation. The efficiency of the molecular recognitive photocatalytic benzene decomposition was related to the degree in the swelling of the titanates in water.
| Original language | English |
|---|---|
| Pages (from-to) | 3601-3604 |
| Number of pages | 4 |
| Journal | Journal of the American Chemical Society |
| Volume | 132 |
| Issue number | 10 |
| DOIs | |
| Publication status | Published - 2010 Mar 17 |
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ASJC Scopus subject areas
- Chemistry(all)
- Catalysis
- Biochemistry
- Colloid and Surface Chemistry
Cite this
Molecular recognitive photocatalysis driven by the selective adsorption on layered titanates. / Ide, Yusuke; Nakasato, Yuri; Ogawa, Makoto.
In: Journal of the American Chemical Society, Vol. 132, No. 10, 17.03.2010, p. 3601-3604.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Molecular recognitive photocatalysis driven by the selective adsorption on layered titanates
AU - Ide, Yusuke
AU - Nakasato, Yuri
AU - Ogawa, Makoto
PY - 2010/3/17
Y1 - 2010/3/17
N2 - The composition of layered alkali titanates (MxTi 2-x/3Lix/3O4; M = K+, Li+ Na+) was tuned to control the swelling of the titanates in water and subsequently achieve molecular-sieve-like molecular recognitive photocatalytic decomposition of aqueous organic compounds on the titanates. Layered potassium lithium titanates with different layer charge density, KxTi 2-x/3Lix/3O4 (x = 0.61, 0.67, and 0.74), was first synthesized and then the interlayer K+ was quantitatively exchanged with Li+ and Na+ to form LixTi 2x-/3- Lix/3O4 (X= 0.61, 0.67, and 0.76) and NaxTi2-x/3Lix/3O4 0.61, 0.67, and 0.76). The water adsorption/ desorption isotherms and X-ray diffraction patterns of the titanates revealed that the pristine K-type titanates hardly hydrated, while the Li+- and Na+-exchanged titanates expanded the interlayer space upon the hydration and the degree in the hydration was larger for the Na forms than for the Li ones and depended on the layer charge density. The present titanates were found to selectively adsorb benzene from an aqueous mixture of benzene, phenol, and 4-butylphenol and subsequently decompose benzene upon UV irradiation. The efficiency of the molecular recognitive photocatalytic benzene decomposition was related to the degree in the swelling of the titanates in water.
AB - The composition of layered alkali titanates (MxTi 2-x/3Lix/3O4; M = K+, Li+ Na+) was tuned to control the swelling of the titanates in water and subsequently achieve molecular-sieve-like molecular recognitive photocatalytic decomposition of aqueous organic compounds on the titanates. Layered potassium lithium titanates with different layer charge density, KxTi 2-x/3Lix/3O4 (x = 0.61, 0.67, and 0.74), was first synthesized and then the interlayer K+ was quantitatively exchanged with Li+ and Na+ to form LixTi 2x-/3- Lix/3O4 (X= 0.61, 0.67, and 0.76) and NaxTi2-x/3Lix/3O4 0.61, 0.67, and 0.76). The water adsorption/ desorption isotherms and X-ray diffraction patterns of the titanates revealed that the pristine K-type titanates hardly hydrated, while the Li+- and Na+-exchanged titanates expanded the interlayer space upon the hydration and the degree in the hydration was larger for the Na forms than for the Li ones and depended on the layer charge density. The present titanates were found to selectively adsorb benzene from an aqueous mixture of benzene, phenol, and 4-butylphenol and subsequently decompose benzene upon UV irradiation. The efficiency of the molecular recognitive photocatalytic benzene decomposition was related to the degree in the swelling of the titanates in water.
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U2 - 10.1021/ja910591v
DO - 10.1021/ja910591v
M3 - Article
VL - 132
SP - 3601
EP - 3604
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
SN - 0002-7863
IS - 10
ER -