Preparation of TiO2 Nanocrystallite Powders Coated with 9 mol% ZnO for Cosmetic Applications in Sunscreens

International Journal of Molecular Sciences

Horng-Huey Ko¹  Hui-Ting Chen¹  Feng-Ling Yen¹  Wan-Chen Lu¹  Chih-Wei Kuo² 

[1] Department of Fragrance and Cosmetic Science, Kaohsiung Medical University, 100 Shih-Chuan 1st Road, Kaohsiung 80708, Taiwan; E-Mails:;Department of Resources Engineering, National Chen Kung University, 1 Ta-Hsueh Road, Tainan 70101, Taiwan; E-Mail:

关键词: anatase;    rutile;    surface modification with 9 mol% TiO₂;    sunscreens cosmetic application;    co-precipitation process;   

DOI  :  10.3390/ijms13021658

来源: mdpi

【 摘 要 】

The preparation of TiO₂ nanocrystallite powders coated with and without 9 mol% ZnO has been studied for cosmetic applications in sunscreens by a co-precipitation process using TiCl₄ and Zn(NO₃)₂·6H₂O as starting materials. XRD results show that the phases of anatase TiO₂ and rutile TiO₂ 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 TiO₂ appears. In addition, when the TiO₂ 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 TiO₂ and the minor phases of anatase TiO₂ and Zn₂Ti₃O₈. 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 TiO₂ nanocrystallite powders coated with 9 mol% ZnO can be used as the attenuate agent in the UV-A region for cosmetic applications in sunscreens.

【 授权许可】

CC BY   
© 2012 by the authors; licensee Molecular Diversity Preservation International, Basel, Switzerland.