Preparation of TiO 2 nanocrystallite powders coated with 9 mol% ZnO for cosmetic applications in sunscreens

Horng Huey Ko, Hui Ting Chen, Feng Ling Yen, Wan Chen Lu, Chih Wei Kuo, Moo Chin Wang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

35 Scopus citations

Abstract

The preparation of TiO 2 nanocrystallite powders coated with and without 9 mol% ZnO has been studied for cosmetic applications in sunscreens by a co-precipitation process using TiCl 4 and Zn(NO 3) 2·6H 2O as starting materials. XRD results show that the phases of anatase TiO 2 and rutile TiO 2 coexist for precursor powders without added ZnO (T-0Z) and calcined at 523 to 973 K for 2 h. When the T-0Z precursor powders are calcined at 1273 K for 2 h, only the rutile TiO 2 appears. In addition, when the TiO 2 precursor powders contain 9 mol% ZnO (T-9Z) are calcined at 873 to 973 K for 2 h, the crystallized samples are composed of the major phase of rutile TiO 2 and the minor phases of anatase TiO 2 and Zn 2Ti 3O 8. The analyses of UV/VIS/NIR spectra reveal that the absorption of the T-9Z precursor powders after being calcined has a red-shift effect in the UV range with increasing calcination temperature. Therefore, the TiO 2 nanocrystallite powders coated with 9 mol% ZnO can be used as the attenuate agent in the UV-A region for cosmetic applications in sunscreens.

Original languageEnglish
Pages (from-to)1658-1669
Number of pages12
JournalInternational Journal Of Molecular Sciences
Volume13
Issue number2
DOIs
StatePublished - Feb 2012

Keywords

  • Anatase
  • Co-precipitation process
  • Rutile
  • Sunscreens cosmetic application
  • Surface modification with 9 mol% TiO

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