Immobilization of noble metal nanoparticles on the surface of TiO2 by the sonochemical method: Photocatalytic production of hydrogen from an aqueous solution of ethanol

Yoshiteru Mizukoshi, Yoji Makise, Tatsuya Shuto, Jinwei Hu, Aki Tominaga, Sayoko Shironita, Shuji Tanabe

Research output: Contribution to journalArticlepeer-review

127 Citations (Scopus)

Abstract

Sonochemically prepared Pt, Au and Pd nanoparticles were successfully immobilized onto TiO2 with the assistance of prolonged sonication. Their photocatalytic activities were evaluated in H2 production from aqueous ethanol solutions. Beside the sonochemical method, the conventional impregnation method was also employed to prepare photocatalysts. The sonochemically prepared catalysts showed higher activities than did the conventional ones. Their photocatalytic activities depended on the work functions and the dimensions of supported noble metal nanoparticles. Smaller Pt nanoparticles effectively restricted recombination of electrons and holes and provided H2 at a higher rate.

Original languageEnglish
Pages (from-to)387-392
Number of pages6
JournalUltrasonics Sonochemistry
Volume14
Issue number3
DOIs
Publication statusPublished - 2007 Jan 1

Keywords

  • Hydrogen production
  • Noble metal nanoparticles
  • Photocatalysts
  • Sonochemical reduction

ASJC Scopus subject areas

  • Chemical Engineering (miscellaneous)
  • Environmental Chemistry
  • Radiology Nuclear Medicine and imaging
  • Acoustics and Ultrasonics
  • Organic Chemistry
  • Inorganic Chemistry

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