Abstract
Macroporous solids with crystalline layered walls were fabricated from colloidal mixtures of size-controlled niobate nanosheets and polystyrene spheres. The macroporous solids, obtained after burning off the spheres, were characterized by scanning electron microscopy and X-ray diffraction. The obtained structures strongly depended on the lateral dimension L of the nanosheets used. When small nanosheets (L = 100 nm) were used, partly ordered macroporous solids with interconnected pores were obtained, whereas sponge-like random macroporous structures were obtained with larger nanosheets (L = 190 and 270 nm). Peapod-like hollow structures were obtained when we used small (L = 190 nm) and very large (L = 3 μm) nanosheets at the same time. The microstructure of the pore walls was controllable by changing the calcination conditions. The walls were composed of propylammonium/K4Nb6O17 intercalation compound which has a layered structure with exchangeable cations in the interlayer space, stable up to 350 °C for 6 h on calcination. The walls were converted to crystalline K8Nb18O49 after calcination at 500 °C for 6 h.
| Original language | English |
|---|---|
| Pages (from-to) | 369-373 |
| Number of pages | 5 |
| Journal | Journal of Colloid and Interface Science |
| Volume | 313 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2007 Sep 1 |
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Keywords
- Inorganic nanosheet
- Ion-exchangeable layered niobate
- Macroporous solid
ASJC Scopus subject areas
- Colloid and Surface Chemistry
- Physical and Theoretical Chemistry
- Surfaces and Interfaces
Cite this
Preparation of porous solids composed of layered niobate walls from colloidal mixtures of niobate nanosheets and polystyrene spheres. / Miyamoto, Nobuyoshi; Kuroda, Kazuyuki.
In: Journal of Colloid and Interface Science, Vol. 313, No. 1, 01.09.2007, p. 369-373.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Preparation of porous solids composed of layered niobate walls from colloidal mixtures of niobate nanosheets and polystyrene spheres
AU - Miyamoto, Nobuyoshi
AU - Kuroda, Kazuyuki
PY - 2007/9/1
Y1 - 2007/9/1
N2 - Macroporous solids with crystalline layered walls were fabricated from colloidal mixtures of size-controlled niobate nanosheets and polystyrene spheres. The macroporous solids, obtained after burning off the spheres, were characterized by scanning electron microscopy and X-ray diffraction. The obtained structures strongly depended on the lateral dimension L of the nanosheets used. When small nanosheets (L = 100 nm) were used, partly ordered macroporous solids with interconnected pores were obtained, whereas sponge-like random macroporous structures were obtained with larger nanosheets (L = 190 and 270 nm). Peapod-like hollow structures were obtained when we used small (L = 190 nm) and very large (L = 3 μm) nanosheets at the same time. The microstructure of the pore walls was controllable by changing the calcination conditions. The walls were composed of propylammonium/K4Nb6O17 intercalation compound which has a layered structure with exchangeable cations in the interlayer space, stable up to 350 °C for 6 h on calcination. The walls were converted to crystalline K8Nb18O49 after calcination at 500 °C for 6 h.
AB - Macroporous solids with crystalline layered walls were fabricated from colloidal mixtures of size-controlled niobate nanosheets and polystyrene spheres. The macroporous solids, obtained after burning off the spheres, were characterized by scanning electron microscopy and X-ray diffraction. The obtained structures strongly depended on the lateral dimension L of the nanosheets used. When small nanosheets (L = 100 nm) were used, partly ordered macroporous solids with interconnected pores were obtained, whereas sponge-like random macroporous structures were obtained with larger nanosheets (L = 190 and 270 nm). Peapod-like hollow structures were obtained when we used small (L = 190 nm) and very large (L = 3 μm) nanosheets at the same time. The microstructure of the pore walls was controllable by changing the calcination conditions. The walls were composed of propylammonium/K4Nb6O17 intercalation compound which has a layered structure with exchangeable cations in the interlayer space, stable up to 350 °C for 6 h on calcination. The walls were converted to crystalline K8Nb18O49 after calcination at 500 °C for 6 h.
KW - Inorganic nanosheet
KW - Ion-exchangeable layered niobate
KW - Macroporous solid
UR - http://www.scopus.com/inward/record.url?scp=34447255879&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=34447255879&partnerID=8YFLogxK
U2 - 10.1016/j.jcis.2007.03.069
DO - 10.1016/j.jcis.2007.03.069
M3 - Article
VL - 313
SP - 369
EP - 373
JO - Journal of Colloid and Interface Science
JF - Journal of Colloid and Interface Science
SN - 0021-9797
IS - 1
ER -