TY - JOUR
T1 - Fabrication of transparent-colorless Nb 2 O 5 nanocrystal layers and their photocatalytic evaluation using organosilane thin films
AU - Suzuki, Sayaka
AU - Teshima, Katsuya
AU - Yubuta, Kunio
AU - Shishido, Toetsu
AU - Oishi, Shuji
N1 - Funding Information:
This research was partially supported by Advanced Low Carbon Technology Research and Development Program (ALCA) from Japan Science and Technology Agency. A part of this work was supported by a Grant-in-Aid for JSPS Fellows (No. 23·5691) of Ministry of Education, Culture, Sports, Science and Technology, Japan. This research was partially performed under the interuniversity cooperative research program of the Advanced Research Center of Metallic Glasses, Institute for Materials Research, Tohoku University.
PY - 2013/9/1
Y1 - 2013/9/1
N2 - Photocatalytic Nb 2 O 5 nanocrystal layers were successfully synthesized using NbO x nanosheets obtained from layered K 4 Nb 6 O 17 crystals. First, idiomorphic K 4 Nb 6 O 17 crystals were grown using the KCl flux method, and then a two-step process involving proton exchange and exfoliation was carried out in order to make the nanosheets. Next, the rectangular nanosheets were mixed with polyethylene glycol, water and ethanol to prepare a nanosheet paste, and the paste was then evenly spin-cast on silica glass. Upon heating, decomposition and evaporation of the solvents yielded transparent, colorless nanocrystal layers with good adhesion. During the heating process, some nanosheets rolled up into nanotubes; therefore, nanocrystal layers consisting of both nanosheets and nanotubes were fabricated. The nanocrystal layers exhibited photocatalytic activity for the photodegradation of organosilane thin films under UV light irradiation. The organosilane thin films were photocatalytically decomposed and that the surfaces were converted from hydrophobic to ultrahydrophilic. Furthermore, micropatterned nanocrystal layer was readily fabricated using hydrophobic/hydrophilic template.
AB - Photocatalytic Nb 2 O 5 nanocrystal layers were successfully synthesized using NbO x nanosheets obtained from layered K 4 Nb 6 O 17 crystals. First, idiomorphic K 4 Nb 6 O 17 crystals were grown using the KCl flux method, and then a two-step process involving proton exchange and exfoliation was carried out in order to make the nanosheets. Next, the rectangular nanosheets were mixed with polyethylene glycol, water and ethanol to prepare a nanosheet paste, and the paste was then evenly spin-cast on silica glass. Upon heating, decomposition and evaporation of the solvents yielded transparent, colorless nanocrystal layers with good adhesion. During the heating process, some nanosheets rolled up into nanotubes; therefore, nanocrystal layers consisting of both nanosheets and nanotubes were fabricated. The nanocrystal layers exhibited photocatalytic activity for the photodegradation of organosilane thin films under UV light irradiation. The organosilane thin films were photocatalytically decomposed and that the surfaces were converted from hydrophobic to ultrahydrophilic. Furthermore, micropatterned nanocrystal layer was readily fabricated using hydrophobic/hydrophilic template.
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U2 - 10.1016/j.apsusc.2013.05.023
DO - 10.1016/j.apsusc.2013.05.023
M3 - Article
AN - SCOPUS:84879685551
SN - 0169-4332
VL - 280
SP - 539
EP - 544
JO - Applied Surface Science
JF - Applied Surface Science
ER -