One-pot synthesis of anatase, rutile-decorated hydrogen titanate nanorods by yttrium doping for solar H2production

Sovann Khan, Hiroshi Ikari, Norihiro Suzuki, Kazuya Nakata, Chiaki Terashima, Akira Fujishima, Ken Ichi Katsumata, Vicente Rodríguez-González

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1 Citation (Scopus)

Abstract

We have prepared yttrium (Y)-doped hydrogen titanate nanorods (HTN) by a microwave-assisted hydrothermal method. Y-doped HTN showed much improved photocatalytic activities for both H2 evolution and dye decomposition. H2 production from a methanol-water solution under UV-visible light for 7 h was enhanced by a factor of 5.5 with 1 wt % Y-doping. Doping with Y3+ ions reduced the band gap of HTN by ∼0.28 eV and induced new phases of anatase and rutile. High photocatalysis by Y-doping was attributed to enhanced light absorption (smaller band gap) and effective charge separation (heterojunction). To optimize H2 production, a series of experiments examining effects of doping concentrations and non-noble surface metal (e.g., Ni, Cu, Co) loading were carefully performed. Y-doping in this work is a new and promising approach for synthesizing highly active HTN by producing the HTN/rutile/anatase heterostructure within the one-pot method.

Original languageEnglish
Pages (from-to)23081-23089
Number of pages9
JournalACS Omega
Volume5
Issue number36
DOIs
Publication statusPublished - Sep 15 2020
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

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