A facile general route for ternary Fe2O3@TiO2@nanometal (Au, Ag) composite as a high-performance and recyclable photocatalyst

Sung Eun Kim, Jae Young Woo, Soo Yeon Kang, Byoung Koun Min, Joong Kee Lee, Sang Wha Lee

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

A modified sol–gel reaction of alkoxy-terminated magnetite (Fe3O4) with titanium alkoxide afforded core–shell nanostructure with titania capsule. Ambient-air calcination of core–shell nanostructure resulted in the formation of Fe2O3@TiO2 with photocatalytic activity, the degree of which depended on the calcination temperature (500–800 °C). The Fe2O3@TiO2 (700 °C) with higher oxygen vacancies exhibited enhanced photocatalytic activity than that of Fe2O3@TiO2 (500 °C) with fair magnetism, despite its lower surface area. Au nanometal deposition enhanced the photocatalytic activity of recyclable Fe2O3@TiO2 (500 °C) due to the increased charge separation, whereas Ag nanometal deposition induced the slight increase in the photocatalytic activity of Fe2O3@TiO2@Ag.

Original languageEnglish
Pages (from-to)142-149
Number of pages8
JournalJournal of Industrial and Engineering Chemistry
Volume43
DOIs
Publication statusPublished - 2016 Nov 25

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Keywords

  • Calcination temperature
  • FeO@TiO@Au
  • Photocatalytic activity
  • Recyclable
  • Sonochemical deposition
  • Ternary composite

ASJC Scopus subject areas

  • Chemical Engineering(all)

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