HUSCAP logo Hokkaido Univ. logo

Hokkaido University Collection of Scholarly and Academic Papers >
Institute for Catalysis >
Peer-reviewed Journal Articles, etc >

Photocatalytic Activity of Radial Rutile Titanium(IV) Oxide Microspheres for Aerobic Oxidation of Organics

Files in This Item:
Accepted SI.docxSupporting Information505.6 kBMicrosoft Word XMLView/Open
Accepted article.pdf639.56 kBPDFView/Open
Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/87959

Title: Photocatalytic Activity of Radial Rutile Titanium(IV) Oxide Microspheres for Aerobic Oxidation of Organics
Authors: Kojima, Ryota Browse this author
Ohtani, Bunsho Browse this author →KAKEN DB
Tada, Hiroaki Browse this author →KAKEN DB
Keywords: sea urchin-like TiO2 microspheres
oxygen reduction reaction
surface modification
photocatalysis
ERDT
CBB pattern
Issue Date: 4-Feb-2022
Publisher: Wiley-Blackwell
Journal Title: ChemPhysChem
Volume: 23
Issue: 3
Start Page: e202100793
Publisher DOI: 10.1002/cphc.202100793
Abstract: Radial rutile TiO2 nanorod homomesocrystals (TiO2-NR HOMCs) or the so-called "sea urchin-like TiO2 microspheres" were synthesized by using a hydrothermal method. TiO2-NR HOMCs show photocatalytic activity for aerobic oxidative degradation of 2-naphthol under irradiation of UV- and visible light. Furthermore, extremely small iron oxide clusters were formed on the surface of TiO2-NR HOMCs (FeOx/TiO2-NR HOMCs) by the chemisorption-calcination technique to reduce the band gap. The FeOx-surface modification gives rise to drastic enhancement of the UV- and visible-light activity. Reversed double-beam photoacoustic spectroscopy measurements were performed for TiO2-NR HOMCs and FeOx/TiO2-NR HOMCs to obtain the ERDT (energy-resolved distribution of electron traps)/CBB (conduction-band bottom) patterns. The ERDT/CBB pattern of TiO2-NR HOMCs consists of two components derived from rutile (C1) and amorphous TiO2 (C2). In the pattern, the surface electron traps in C2 exist near the CBB to be removed by the FeOx-surface modification. By taking this finding into consideration, the striking surface modification effect is ascribable to the electrocatalytic activity (or the action as an electron reservoir) of the FeOx clusters for multiple ORR, the suppression of recombination, and the increase in the visible-light harvesting efficiency.
Rights: This is the peer reviewed version of the following article: R. Kojima, B. Ohtani, H. Tada, ChemPhysChem 2022, 23, e202100793., which has been published in final form at https://doi.org/10.1002/cphc.202100793. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited.
Type: article (author version)
URI: http://hdl.handle.net/2115/87959
Appears in Collections:触媒科学研究所 (Institute for Catalysis) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 大谷 文章

Export metadata:

OAI-PMH ( junii2 , jpcoar_1.0 )

MathJax is now OFF:


 

 - Hokkaido University