Anatase crystal growth and photocatalytic characteristics of hot water-treated polyethylene oxide-titania nanohybrids

Yun Mo Sung, Yong Ji Lee, Seong Min Lee

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

Hybrid polyethylene oxide (PEO)-TiO2 and pure TiO2 powders were synthesized using a sol-gel route and hot water treated at 90°C. Anatase phase formation characteristics were investigated and compared for each powder using X-ray diffraction (XRD). Hybrid powder showed enhanced anatase formation kinetics and thus high crystallinity with anatase phase compared to pure TiO2. Enhanced kinetics and crystallinity of hybrids was discussed based upon the increased surface area coming from dissolution of PEO during hot water treatment, which in turn induced formation and rearrangement of increased number of free Ti-OH bonds. By condensation reaction of Ti-OH bonds resultant Ti-O-Ti bonds would readily form and grow into anastase crystals. Hybrid powder showed well-developed anatase crystals leading to much enhanced photocatalytic properties compared to pure TiO2 powder.

Original languageEnglish
Pages (from-to)312-316
Number of pages5
JournalJournal of Crystal Growth
Volume267
Issue number1-2
DOIs
Publication statusPublished - 2004 Jun 15
Externally publishedYes

Keywords

  • A1. Nanostructures
  • A2. Hydrothermal crystal growth
  • B2. Semiconducting materials

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Inorganic Chemistry
  • Materials Chemistry

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