Abstract
We have investigated the chemical bonding character and physicochemical properties of mesoporous zinc oxide-layered titanate nanocomposites synthesized by an exfoliation-restacking route. According to our analyses using X-ray diffraction, high resolution transmission electron microscopy, and N2 adsorption-desorption isotherm measurements, nanocrystalline zinc oxides are stabilized not only in the interlayer space of the host titanate but also in the mesopores of the nanocomposites formed by the house-of-card type stacking of the crystallites. X-ray absorption spectroscopic analyses at Ti K- and Zn K-edges clearly demonstrate that nanocrystalline zinc oxides crystallized with a Wurzite type structure, and the lepidocrocite structure of the host titanate remains unchanged after hybridization and postcalcination. Upon hybridization with zinc oxide nanoparticles, the photocatalytic activity of layered titanate is enhanced with respect to the oxidative photodegradation of phenol and dichloroacetate. But of greater importance is that the chemical stability of guest zinc oxide against acidic corrosion is greatly improved by hybridization with layered titanate. In this regard, the present hybridization technique enables the application of chemically unstable nanostructured zinc oxides even in corrosive environments.
| Original language | English |
|---|---|
| Pages (from-to) | 1658-1664 |
| Number of pages | 7 |
| Journal | Journal of Physical Chemistry C |
| Volume | 111 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 2007 Feb 1 |
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All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Energy(all)
- Physical and Theoretical Chemistry
- Surfaces, Coatings and Films
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Chemical bonding character and physicochemical properties of mesoporous zinc oxide-layered titanate nanocomposites. / Kim, Tae Woo; Hwang, Seong Ju; Park, Yiseul; Choi, Wonyong; Choy, Jin Ho.
In: Journal of Physical Chemistry C, Vol. 111, No. 4, 01.02.2007, p. 1658-1664.Research output: Contribution to journal › Article
TY - JOUR
T1 - Chemical bonding character and physicochemical properties of mesoporous zinc oxide-layered titanate nanocomposites
AU - Kim, Tae Woo
AU - Hwang, Seong Ju
AU - Park, Yiseul
AU - Choi, Wonyong
AU - Choy, Jin Ho
PY - 2007/2/1
Y1 - 2007/2/1
N2 - We have investigated the chemical bonding character and physicochemical properties of mesoporous zinc oxide-layered titanate nanocomposites synthesized by an exfoliation-restacking route. According to our analyses using X-ray diffraction, high resolution transmission electron microscopy, and N2 adsorption-desorption isotherm measurements, nanocrystalline zinc oxides are stabilized not only in the interlayer space of the host titanate but also in the mesopores of the nanocomposites formed by the house-of-card type stacking of the crystallites. X-ray absorption spectroscopic analyses at Ti K- and Zn K-edges clearly demonstrate that nanocrystalline zinc oxides crystallized with a Wurzite type structure, and the lepidocrocite structure of the host titanate remains unchanged after hybridization and postcalcination. Upon hybridization with zinc oxide nanoparticles, the photocatalytic activity of layered titanate is enhanced with respect to the oxidative photodegradation of phenol and dichloroacetate. But of greater importance is that the chemical stability of guest zinc oxide against acidic corrosion is greatly improved by hybridization with layered titanate. In this regard, the present hybridization technique enables the application of chemically unstable nanostructured zinc oxides even in corrosive environments.
AB - We have investigated the chemical bonding character and physicochemical properties of mesoporous zinc oxide-layered titanate nanocomposites synthesized by an exfoliation-restacking route. According to our analyses using X-ray diffraction, high resolution transmission electron microscopy, and N2 adsorption-desorption isotherm measurements, nanocrystalline zinc oxides are stabilized not only in the interlayer space of the host titanate but also in the mesopores of the nanocomposites formed by the house-of-card type stacking of the crystallites. X-ray absorption spectroscopic analyses at Ti K- and Zn K-edges clearly demonstrate that nanocrystalline zinc oxides crystallized with a Wurzite type structure, and the lepidocrocite structure of the host titanate remains unchanged after hybridization and postcalcination. Upon hybridization with zinc oxide nanoparticles, the photocatalytic activity of layered titanate is enhanced with respect to the oxidative photodegradation of phenol and dichloroacetate. But of greater importance is that the chemical stability of guest zinc oxide against acidic corrosion is greatly improved by hybridization with layered titanate. In this regard, the present hybridization technique enables the application of chemically unstable nanostructured zinc oxides even in corrosive environments.
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U2 - 10.1021/jp0662552
DO - 10.1021/jp0662552
M3 - Article
AN - SCOPUS:33847373338
VL - 111
SP - 1658
EP - 1664
JO - Journal of Physical Chemistry C
JF - Journal of Physical Chemistry C
SN - 1932-7447
IS - 4
ER -