Preparation and Photocatalytic Properties of Nanosized La3+ and Co2+ Co-Doped TiO2 by Microemulsions

Wei Liang Liu; Dan Li Lu; Chang Chun Ge; Jian Hua Chen; Zhi Ping He

doi:10.4028/www.scientific.net/KEM.336-338.1943

Paper Titles

Preparation of Sialon from Solid Wastes by Colloidal Process
p.1927

Oxidation Resistance of Mild Steels Coated with Ce⁴⁺-Modified TiO₂ Nanofilms
p.1930

Hierarchically Nanostructured Porous Functional Ceramics
p.1933

Preparation and Photocatalytic Property of Platinum-Modified TiO₂ Ceramic Film Using Different Compound Techniques
p.1939

Preparation and Photocatalytic Properties of Nanosized La³⁺ and Co²⁺ Co-Doped TiO₂ by Microemulsions
p.1943

Preparation of Rare-Earth Element Doped Titanium Oxide Thin Films and Photocatalysis Properties
p.1946

Influence of La³⁺ Ions on the Photo-Catalytic Activity of TiO₂ Films Prepared by Micro-Plasma Oxidation Method
p.1949

Dispersion and Electrophoretic Deposition of Titania Particles
p.1953

Photo-Catalytic Activity of Fe³⁺/Sn⁴⁺ Co-Doped Titanium Dioxide Nano-Crystalline Thin Films for Methyl Orange Degradation
p.1956

HomeKey Engineering MaterialsKey Engineering Materials Vols. 336-338Preparation and Photocatalytic Properties of...

Preparation and Photocatalytic Properties of Nanosized La³⁺ and Co²⁺ Co-Doped TiO₂ by Microemulsions

Abstract:

La3+ and Co2+ co-doped titania nanoparticles were prepared from reacting TiOSO4, La(NO3)3 and Co(NO3)2 with NH4OH in water/Triton X-100/n-hexanol/cyclohexane microemulsions. The structure, surface morphology and the specific surface area of the samples were characterized. The photocatalytic efficiency of as-prepared TiO2 was tested by photodegrading methyl orange. The results showed that doping with La3+ and Co2+ could suppress the growth of TiO2 grains and increase the specific surface area; When the calcination temperature increased from 300°C to 900°C, the average crystallite size of the particles increased from 7.3nm to 35.6 nm andthe specific surface area of the particles decreased rapidly from 205.5m2/g to 41.2m2/g. The synthesized amorphous particles wer transformed into anatase phase at 300°C, and further into rutile phase at 900°C. UV-Vis diffuse reflectance spectrum revealed that La3+ and Co2+ co-doped TiO2 absorbed UV light and visible light, while pure TiO2 could only absorb UV light. In the experiments of photodegrading methyl orange, it was proved that La3+ and Co2+ co-doped TiO2 had high photocatalytic activity under UV light and visible light, while pure TiO2 showed photocatalytic activity just under UV light.