Photocatalytic equipment with Nitrogen-doped titanium dioxide for air cleaning and disinfecting

Le T, S.; Ngo, Q.B.; Nguyen, V.D.; Nguyen, H.C.; Dao, T.H.; Tran, X.T.; Kabachkov, E.N.; Balikhin, I.L.

Авторы: Le T.S., Ngo, Q B., Nguyen, V D., Nguyen, H C., Dao, T H., Tran, X T., Kabachkov, E N., Balikhin, I L.
Журнал: Advances in Natural Sciences
Том: 5
Номер: 1
Год издания: 2014
DOI: 10.1088/2043-6262/5/1/015017
Аннотация: Nitrogen-doped TiO2 nanoparticle photocatalysts were synthesized by a sol-gel procedure using tetra-n-butyl orthotitanate as a titanium precursor and urea as a nitrogen source. Systematic studies for the preparation parameters and their impact on the material's structure were carried out by multiple techniques: thermogravimetric and differential scanning calorimetric analysis, x-ray diffraction, scanning electron microscope, transmission electron microscopy, energy dispersive x-ray spectroscopy and UV-Vis diffuse reflectance spectrophotometry showed that the nitrogen-doped TiO2 calcined at 500 °C for 3 h exhibited a spherical form with a particle size about 15-20 nm and crystal phase presented a mixture of 89.12% anatase. The obtained product was deposited on a porous quartz tube (D = 74 mm; l = 418 mm) to manufacture an air photocatalytic cleaner as a prototype of the TIOKRAFT company's equipment. The created air cleaner was able to remove 60% of 10ppm acetone within 390 min and degrade 98.5% of bacteria (total aerobic bacteria and fungi, 300 cfu m- 3) within 120 min in a 10 m3 box. These photodegradation activities of N-TiO2 are higher than that of the commercial nano-TiO2 (Skyspring Inc., USA, particle size of 5-10 nm). © 2014 Vietnam Academy of Science and Technology.
Добавил в систему: Кабачков Евгений Николаевич

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