ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
La3+ and Co2+ co-doped titania nanoparticles were prepared from reacting TiOSO4, La(NO3)3and 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 photocatalyticefficiency of as-prepared TiO2 was tested by photodegrading methyl orange. The results showed thatdoping 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 theparticles increased from 7.3nm to 35.6 nm and[removed info]the specific surface area of the particles decreased rapidlyfrom 205.5m2/g to 41.2m2/g. The synthesized amorphous particles wer[removed info] transformed into anatase phase at300°C, and further into rutile phase at 900°C. UV-Vis diffuse reflectance spectrum revealed that La3+ andCo2+ co-doped TiO2 absorbed UV light and visible light, while pure TiO2 could only absorb UV light. Inthe experiments of photodegrading methyl orange, it was proved that La3+ and Co2+ co-doped TiO2 hadhigh photocatalytic activity under UV light and visible light, while pure TiO2 showed photocatalyticactivity just under UV light
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.336-338.1943.pdf
