Modification of TiO2 surface for improved light fastness

被引：5

作者：

George, John ^{[1
]}

Gireesh, V. S. ^{[1
]}

Ninan, Georgee ^{[1
]}

Nair, S. Krishnan ^{[1
]}

机构：

[1] Kerala Minerals & Met Ltd, R&D Dept, Kollam 691583, Kerala, India

来源：

INTERNATIONAL JOURNAL OF INDUSTRIAL CHEMISTRY | 2015年 / 6卷 / 03期

关键词：

Light fastness; Zeta potential; Reducing strength; UV light;

D O I：

10.1007/s40090-015-0044-x

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Introduction Rutile TiO2 dioxide particles were modified with P2O5 treatment for improving its UV light fastness and the characteristics are studied using different techniques. The investigation aimed at improving the light fastness of the TiO2 particles by surface modification with P2O5 and optimizing its content for best performance. The coating of different inorganic oxides such as SiO2, Al2O3, P2O5, etc. were confirmed by atomic absorption spectroscopy. Microscopic evaluation was employed to evaluate the surface morphology of modified TiO2. The specific surface area was estimated using BET method. Effect of the surface modification with oxides on electrokinetic properties and zeta potential is appraised. Changes in the pigmentary properties on UV exposure are determined as a measure of light fastness. Results The light fastness of the modified samples is superior to commercial TiO2 pigments. The dispersion and pigmentary characteristics of the P2O5 modified samples have approached the commercial rutile TiO2 pigment standards. The reducing strength values indicate good dispersion characteristics of the P2O5 modified samples. Conclusion The light fastness of TiO2 particles can be improved considerably on imparting the coating of P2O5 along with Al2O3.

引用

页码：133 / 141

页数：9

共 16 条

[1] PRECIPITATION OF ALUMINOSILICATES ON THE SURFACE OF TITANIUM-DIOXIDE [J].

BRUNI, M ;

VISCA, M ;

GARBASSI, F ;

MELLOCERESA, E .

INDUSTRIAL & ENGINEERING CHEMISTRY PRODUCT RESEARCH AND DEVELOPMENT, 1985, 24 (04) :579-586

[2]

Decolibus RL, 1975, US Patent, Patent No. 3928057

[3]

DIEBOLD MP, 1995, SURF COAT INT, V78, P250

[4] COPRECIPITATION OF HYDROUS ALUMINA AND SILICA WITH TIO2 PIGMENT AS SUBSTRATE [J].

GESENHUES, U .

JOURNAL OF COLLOID AND INTERFACE SCIENCE, 1994, 168 (02) :428-436

[5]

Howard PB, 1977, US Patent., Patent No. 4052222

[6]

JACOBSON HW, 1983, Patent No. 4416699

[7] SURFACE CHARACTERIZATION OF COATED POWDERS - AL2O3-SIO2-COATED TIO2 [J].

JOHANSSON, LS ;

LOSOI, T .

SURFACE AND INTERFACE ANALYSIS, 1991, 17 (05) :230-236

[8] Photocatalytic degradation of 4-chlorophenol. 1. The hydroquinone pathway [J].

Li, XJ ;

Cubbage, JW ;

Tetzlaff, TA ;

Jenks, WS .

JOURNAL OF ORGANIC CHEMISTRY, 1999, 64 (23) :8509-8524

[9] Photocatalytic degradation of 4-chlorophenol. 2. The 4-chlorocatechol pathway [J].

Li, XJ ;

Cubbage, JW ;

Jenks, WS .

JOURNAL OF ORGANIC CHEMISTRY, 1999, 64 (23) :8525-8536

[10] Surface characteristics of hydrous silica-coated TiO2 particles [J].

Lin, YL ;

Wang, TJ ;

Jin, Y .

POWDER TECHNOLOGY, 2002, 123 (2-3) :194-198

← 1 2 →