TY - JOUR
T1 - Effects of selective leaching of bismuth oxide sheets in triple-layered Aurivillius phases on their photocatalytic activities
AU - Kudo, Manabu
AU - Tsuzuki, Saki
AU - Katsumata, Ken Ichi
AU - Yasumori, Atsuo
AU - Sugahara, Yoshiyuki
N1 - Funding Information:
The authors express their gratitude to Prof. Kazuyuki Kuroda, Department of Applied Chemistry, Waseda University, Prof. Kiyoshi Okada, Department of Metallurgy and Ceramics Science, Tokyo Institute of Technology, and Dr. Shigeo Satokawa, Tokyo Gas Co., Ltd., for their valuable suggestion. We thank Mr. Shinsuke Tani for his assistance in the experiments. This work was supported in part by the Grant-in-Aid for Scientific Research (No. 14350462) from the Ministry of Education, Science, Sports, and Culture, Japan.
PY - 2004/7/21
Y1 - 2004/7/21
N2 - The photocatalytic activities of triple-layered Aurivillius phases, Bi 2A′NaNb3O12 (A ′=Sr, Ca) and Bi2CaNaTa3O12, and of protonated forms prepared from these Aurivillius phases through selective leaching of bismuth oxide sheets were investigated. UV-Vis diffuse reflectance spectra showed blue shifts of the adsorption edges upon selective leaching. Although none of the triple-layered Aurivillius phases were active for photocatalytic H2 evolution from a 20 vol% ethanol solution, all the corresponding protonated forms showed photocatalytic activities for H 2 evolution. The effects of the changes in electronic structures and interlayer surface creation on photocatalytic activities are discussed.
AB - The photocatalytic activities of triple-layered Aurivillius phases, Bi 2A′NaNb3O12 (A ′=Sr, Ca) and Bi2CaNaTa3O12, and of protonated forms prepared from these Aurivillius phases through selective leaching of bismuth oxide sheets were investigated. UV-Vis diffuse reflectance spectra showed blue shifts of the adsorption edges upon selective leaching. Although none of the triple-layered Aurivillius phases were active for photocatalytic H2 evolution from a 20 vol% ethanol solution, all the corresponding protonated forms showed photocatalytic activities for H 2 evolution. The effects of the changes in electronic structures and interlayer surface creation on photocatalytic activities are discussed.
UR - http://www.scopus.com/inward/record.url?scp=3142638809&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=3142638809&partnerID=8YFLogxK
U2 - 10.1016/j.cplett.2004.06.010
DO - 10.1016/j.cplett.2004.06.010
M3 - Article
AN - SCOPUS:3142638809
SN - 0009-2614
VL - 393
SP - 12
EP - 16
JO - Chemical Physics Letters
JF - Chemical Physics Letters
IS - 1-3
ER -