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Language: English

Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received March 17, 2016
Accepted April 15, 2016

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Formation of uniform TiO2 nanoshell on α-alumina nanoplates for effective metallic luster pigments

Su Jin Lee Myoung Sang You Sang Hyuk Im^†

Functional Crystallization Center (ERC), Department of Chemical Engineering, Kyung Hee University, 1732 Deogyeong-daero, Giheung-gu, Yongin-si, Gyeonggi-do 17104, Korea

Korean Journal of Chemical Engineering, September 2016, 33(9), 2732-2737(6), 10.1007/s11814-016-0106-6

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Abstract

To synthesize non-corroding effect pigment appearing metallic silver in color, we coated uniform anatase TiO2 nanoshell via sol-gel chemistry. Under the reaction condition using 3M TiCl4 aqueous solution : deionized water : HCl solution=0.75mL : 20 mL : 0 mL, ~50 nm-thick smooth TiO2 nano-shell was fully coated on the surface of α-alumina nanoplates; consequently, the synthesized effect pigments exhibited similar lustering effect and structuring color to commercial effect pigment. Under relatively acidic condition and higher TiCl4 precursor concentration condition (3 M TiCl4 aqueous solution : deionized water :HCl solution=0.75mL : 20 mL : 0.05mL for acidic condition and 1.0 or 1.5mL : 20 mL : 0 mL for higher TiCl4 precursor concentration condition), rougher TiO2 shell was formed.

Keywords

α-Alumina Nanoplates TiO2 Shell Roughness Control Effect Pigment Metallic Silver Color

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