Journal Home > Volume 4 , Issue 3

Titanium dioxide is a photocatalytically active substance used as a white pigment for cosmetics. In sunlight, titanium dioxide catalyzes decomposition of a certain amount of sebum on the skin by ultraviolet radiation. Herein, a novel white pigment for use in cosmetics was developed from titanium dioxide and phosphoric acid at pH = 4 with and without glycerin, sodium lactate, lactic acid, and urea. The chemical composition, powder properties, photocatalytic activity, color phase, and smoothness of the samples were studied. Addition of glycerin led to a decline in the intensity of the X-ray diffraction (XRD) peak of TiO2 relative to that of the other samples. The particle size of the materials prepared with and without additives was 0.3 μm; however, extensive aggregation was observed in the obtained materials. The photocatalytic activity of TiO2 was inhibited by phosphoric acid treatment. The materials prepared with sodium lactate, lactic acid, and glycerin exhibited higher photocatalytic activity than that prepared without additives. The obtained materials showed a high reflectance in the range of visible light, and the L* values in L*a*b* color space were high (where L* defines lightness, a* denotes the red/green value, and b* the yellow/blue value). These results indicate that the samples prepared in this work are suitable for use as white pigments.


menu
Abstract
Full text
Outline
About this article

Influences of additives on phosphoric acid treatment of titanium dioxide as a novel white pigment

Show Author's information Aki MATSUKURAHiroaki ONODA( )
Department of Informatics and Environmental Sciences, Kyoto Prefectual University, 1-5, Shimogamo Nakaragi-cyo, Sakyo-ku, Kyoto 606-8522, Japan

Abstract

Titanium dioxide is a photocatalytically active substance used as a white pigment for cosmetics. In sunlight, titanium dioxide catalyzes decomposition of a certain amount of sebum on the skin by ultraviolet radiation. Herein, a novel white pigment for use in cosmetics was developed from titanium dioxide and phosphoric acid at pH = 4 with and without glycerin, sodium lactate, lactic acid, and urea. The chemical composition, powder properties, photocatalytic activity, color phase, and smoothness of the samples were studied. Addition of glycerin led to a decline in the intensity of the X-ray diffraction (XRD) peak of TiO2 relative to that of the other samples. The particle size of the materials prepared with and without additives was 0.3 μm; however, extensive aggregation was observed in the obtained materials. The photocatalytic activity of TiO2 was inhibited by phosphoric acid treatment. The materials prepared with sodium lactate, lactic acid, and glycerin exhibited higher photocatalytic activity than that prepared without additives. The obtained materials showed a high reflectance in the range of visible light, and the L* values in L*a*b* color space were high (where L* defines lightness, a* denotes the red/green value, and b* the yellow/blue value). These results indicate that the samples prepared in this work are suitable for use as white pigments.

Keywords: particle size, phosphoric acid, photocatalytic activity, titanium dioxide

References(12)

[1]
Diebold U. The surface science of titanium dioxide. Surf Sci Rep 2003, 48: 53–229.
[2]
Senzui M, Tamura T, Miura K, et al. Study on penetration of titanium dioxide (TiO2) nanoparticles into intact and damaged skin in vitro. J Toxicol Sci 2010, 35: 107–113.
[3]
Gamer AO, Leibold E, van Ravenzwaay B. The in vitro absorption of microfine zinc oxide and titanium dioxide through porcine skin. Toxicol in Vitro 2006, 20: 301–307.
[4]
Jones DJ, Aptel G, Brandhorst M, et al. High surface area mesoporous titanium phosphate: Synthesis and surface acidity determination. J Mater Chem 2000, 10: 1957–1963.
[5]
Bhaumik A, Inagaki S. Mesoporous titanium phosphate molecular sieves with ion-exchange capacity. J Am Chem Soc 2001, 123: 691–696.
[6]
Onoda H, Yamaguchi T. Influence of ultrasonic treatment on preparation and powder properties of titanium phosphate. J Mater Chem 2012, 22: 19826–19830.
[7]
Onoda H, Yamaguchi T, Takenaka A. Synthesis and pigmental properties of titanium phosphate with the addition of urea. Int J Cosmetic Sci 2012, 34: 86–90.
[8]
Onoda H, Haruki M, Toyama T. Preparation and powder properties of zinc phosphates with additives. Ceram Int 2014, 40: 3433–3438.
[9]
Ramaswamy V, Jagtap NB, Vijayanand S, et al. Photocatalytic decomposition of methylene blue on nanocrystalline titania prepared by different methods. Mater Res Bull 2008, 43: 1145–1152.
[10]
Du P, Bueno-López A, Verbaas M, et al. The effect of surface OH-population on the photocatalytic activity of rare earth-doped P25-TiO2 in methylene blue degradation. J Catal 2008, 260: 75–80.
[11]
Mills A. An overview of the methylene blus ISO test for assessing the activities of photocatalytic films. Appl Catal B: Environ 2012, 128: 144–149.
[12]
Cheng SY, Yuen CWM, Kan CW, et al. A comprehensive study of silicone-based cosmetic textile agent. Fiber Polym 2009, 10: 132–140.
Publication history
Copyright
Acknowledgements
Rights and permissions

Publication history

Received: 18 February 2015
Revised: 30 March 2015
Accepted: 01 April 2015
Published: 04 July 2015
Issue date: September 2015

Copyright

© The author(s) 2015

Acknowledgements

The authors are grateful to Dr. Takeshi Toyama, Nihon University, Japan, for assistance with smoothness measurements.

Rights and permissions

Open Access: This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution, and reproduction in any medium, provided the original author(s) and the source are credited.

Return