2024-03-28T22:34:18Z
https://soar-ir.repo.nii.ac.jp/oai
oai:soar-ir.repo.nii.ac.jp:00012396
2022-12-14T04:01:38Z
1221:1222
Pore-size expansion of hexagonal-structured nanocrystalline titania/CTAB Nanoskeleton using cosolvent organic molecules
Sakai, Toshio
Yano, Hanae
Shibata, Hirobumi
Endo, Takeshi
Sakamoto, Kazutami
Fukui, Hiroshi
Koshikawa, Naokiyo
Sakai, Hideki
Abe, Masahiko
Hexagonal-structured asssembly
Nanocrystalline titania
Nanoskeleton
Pore-size expansion
Cosolvent organic molecule
Pore-size expansion of hexagonal-structured assembly of nanocrystalline titania (anatase) combined with cetyltrimethyammonium bromide (CH(3)(CH(2))(15)N(+)(CH(3))(3)Br(-), CTAB) (named as Hex-ncTiO(2)/CTAB Nanoskeleton) was achieved with the aid of cosolvent organic molecules (COMs). The pore-size expanded Hex-ncTiO(2)/CTAB Nanoskeleton was prepared through the sot-gel reaction of titanium oxysulfate sulfuric acid hydrate (TiOSO(4)center dot xH(2)SO(4)center dot xH(2)O, TiOSAH) in an aqueous solution initiated by CAB swollen micelles pre-prepared with the addition of COMs into aqueous CTAB micellar solutions at 60 degrees C (the product was named as Hex-ncTiO(2)/CTAB/COM Nanoskeleton). Long-chain alcohol (1-hexadecanol. C16OH), normal alkane (n-decane, C10) and benzene derivatives (benzene. Bz; 1,3,5-trimethylbenzene, TMB; 1,3,5-triethylbenzene, TEB; 1,3,5-triisopropylbenzene, TiPB) were used as COMs to evaluate the effects of COM solubilization site in CTAB micelles and COM molecular size on the pore-size expansion of the Hex-ncTiO(2)/CTAB/COM Nanoskeleton. We found that 1,3,5-trimethylbenzene (TMB) and 1,3,5-triethylbenzene (TEB) act as effective COMs for pore-size expansion of the Hex-ncTiO(2)/CTAB/COM Nanoskeleton in aqueous media. Pore sizes (average diameters) of the Hex-ncTiO(2)/CTAB/TMB Nanoskeleton and Hex-ncTiO(2)/CTAB/TEB Nanoskeleton were enlarged up to 4.2 nm and 4.3 nm, respectively, while pore size (average diameter) of the Hex-ncTiO(2)/CTAB Nanoskeleton prepared in the absence of any COMs was 2.9 nm. We also revealed that thermal stability of the Hex-ncTiO(2)/CTAB/TMB Nanoskeleton became higher than that of Hex-ncTiO(2)/CTAB Nanoskeleton. The hexagonally pore-structure of the Hex-ncTiO(2)/CTAB/TMB Nanoskeleton was retained up to 400 degrees C, while the hexagonally pore-structure of the Hex-ncTiO(2)/CTAB Nanoskeleton was kept up to 300 degrees C.
Article
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS. 371(1-3):29-39 (2010)
journal article
ELSEVIER SCIENCE BV
2010-11-20
application/pdf
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
1-3
371
29
39
0927-7757
AA10892561
https://soar-ir.repo.nii.ac.jp/record/12396/files/Pore-size_expansion_hexagonal-structured_nanocrystalline_titaniaCTAB.pdf
eng
10.1016/j.colsurfa.2010.08.054
https://doi.org/10.1016/j.colsurfa.2010.08.054