TY - JOUR
T1 - Room-Temperature Rutile TiO2 Nanoparticle Formation on Protonated Layered Titanate for High-Performance Heterojunction Creation
AU - Saito, Kanji
AU - Tominaka, Satoshi
AU - Yoshihara, Shun
AU - Ohara, Koji
AU - Sugahara, Yoshiyuki
AU - Ide, Yusuke
N1 - Funding Information:
This work was partly supported by JSPS KAKENHI (grant nos. 26708027 and 15K04614. We thank Mr. Shinpei Enomoto and Mr. Haruo Otsuji for TEM and SEM observation, respectively. The synchrotron radiation experiments were performed at the BL10XU of SPring-8 with the approval of the Japan Synchrotron Radiation Research Institute (JASRI) (proposal no. 2016B1950).
Publisher Copyright:
© 2017 American Chemical Society.
PY - 2017/7/26
Y1 - 2017/7/26
N2 - We report a methodology for creating protonated layered titanate-rutile heterojunctions on the outer particle surface of protonated layered titanate by treating layered potassium titanate (K0.8Ti1.73Li0.27O4) with dilute HCl and then drying it at room temperature under reduced pressure. After Pt co-catalyst loading, this protonated layered titanate/rutile composite with heterojunctions showed higher photocatalytic H2 evolution activity from water under simulated solar light compared to that of Pt-loaded P25, the standard photocatalyst for this reaction. The high photocatalytic activity was ascribable to enhanced photocatalytic activity of the protonated layered titanate based on an efficient charge separation at the protonated layered titanate-rutile heterojunction in addition to the sensitization effects of rutile, which absorbs light with longer wavelengths compared to those of protonated layered titanate.
AB - We report a methodology for creating protonated layered titanate-rutile heterojunctions on the outer particle surface of protonated layered titanate by treating layered potassium titanate (K0.8Ti1.73Li0.27O4) with dilute HCl and then drying it at room temperature under reduced pressure. After Pt co-catalyst loading, this protonated layered titanate/rutile composite with heterojunctions showed higher photocatalytic H2 evolution activity from water under simulated solar light compared to that of Pt-loaded P25, the standard photocatalyst for this reaction. The high photocatalytic activity was ascribable to enhanced photocatalytic activity of the protonated layered titanate based on an efficient charge separation at the protonated layered titanate-rutile heterojunction in addition to the sensitization effects of rutile, which absorbs light with longer wavelengths compared to those of protonated layered titanate.
KW - enhanced charge separation
KW - heterojunction
KW - hydrogen evolution from water
KW - layered titanate
KW - room temperature rutile formation
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U2 - 10.1021/acsami.7b04051
DO - 10.1021/acsami.7b04051
M3 - Article
C2 - 28631476
AN - SCOPUS:85026266304
VL - 9
SP - 24538
EP - 24544
JO - ACS applied materials & interfaces
JF - ACS applied materials & interfaces
SN - 1944-8244
IS - 29
ER -