Photodegradation of Dyes Using Titanium Dioxide Supported on Glass
Photodegradation of dyes, in aqueous solution was carried out using titanium dioxide coated on glass plates, illuminated by blue fluorescent lamps. TiO₂ coated glass was prepared by sol-gel technique. Air was pumped into the mixture to ensure continuous supply of oxygen in the mixture. Methylene...
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| Format: | Thesis |
| Language: | English English |
| Published: |
2002
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| Subjects: | |
| Online Access: | http://psasir.upm.edu.my/id/eprint/9516/1/FSAS_2002_45.pdf http://psasir.upm.edu.my/id/eprint/9516/ |
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| Summary: | Photodegradation of dyes, in aqueous solution was carried out using titanium
dioxide coated on glass plates, illuminated by blue fluorescent lamps. TiO₂ coated glass
was prepared by sol-gel technique. Air was pumped into the mixture to ensure
continuous supply of oxygen in the mixture.
Methylene blue removal was studied based on the effect of amount of coated TiO₂
sol-gel, initial concentration, light intensity, light source, and pH of solution medium.
Comparison was also made to the powder form of TiO₂ which was prepared by the same
method. The highest percentage of methylene blue removal was obtained when the
photodegradation experiment was run using 5 pieces of TiO₂/Glass (4 times of sol-gel
dip-coating) and 10 ppm of methylene blue solution at 28°C after illumination under 4
white fluorescent lamps of 20 W for 4 hours. About 84% of methylene blue was
removed. Methylene blue removal was found to be efficient and comparable to the
illumination using near UV light, sunlight, 4 white fluorescent lamps, 4 dark fluorescent
lamps and 4 blue fluorescent lamps. |
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