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

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• 作者：Su Jin Lee ; Myoung Sang You ; Sang Hyuk Im
• 关键词：α ; Alumina Nanoplates ; TiO2 Shell ; Roughness Control ; Effect Pigment ; Metallic Silver Color
• 刊名：Korean Journal of Chemical Engineering
• 出版年：2016
• 出版时间：September 2016
• 年：2016
• 卷：33
• 期：9
• 页码：2732-2737
• 全文大小：3,869 KB
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Industrial Chemistry and Chemical Engineering
  Catalysis
  Materials Science
  Biotechnology
  
• 出版者：Springer New York
• ISSN：1975-7220
• 卷排序：33

文摘

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.