Application of nano-sized TiO2 photocatalysis to air purification and sterilization / 中华预防医学杂志
Chinese Journal of Preventive Medicine
;
(12): 831-835, 2008.
Artículo
en Chino
| WPRIM
| ID: wpr-242707
ABSTRACT
<p><b>OBJECTIVE</b>To develop and evaluate the efficiency of air purification and sterilization instrument based on nano-sized TiO(2) photocatalytic technique.</p><p><b>METHODS</b>The nano-sized TiO(2) photocatalytic air purification and sterilization instrument was designed and a sample had been prepared. The sterilization efficiencies for E.coli and Klebsiella by the nano-sized TiO(2) photocatalytic instrument and ultraviolet (UV) were measured in closed labs. The on-site efficiency of the instrument was evaluated, too.</p><p><b>RESULTS</b>The nano-sized TiO(2) photocatalytic air purification and sterilization instrument was composed of five units rough filter, nano-sized TiO(2) photocatalytic unit, activated carbon fiber filter, negative ion generator, and programmed control unit. The E.coli killing rates by the nano-sized TiO(2) photocatalytic instrument were 76.0%, 81.8%, 77.5%, and 80.7% at 30, 60, 90, and 120 minutes, respectively. There was no significant difference between the E.coli killing rates of the instrument and UV (P > 0.05), except the 120 minutes timepoint. The Klebsiella killing rates by the instrument were 78.4%, 79.5%, 67.3%, and 58.5% at 30, 60, 90, and 120 minutes, respectively. The Klebsiella killing efficiencies of the instrument at 30 and 60 minutes were better than that of UV (P < 0.01). There was no significant difference between the Klebsiella killing efficiencies of the instrument and UV (P > 0.05).</p><p><b>CONCLUSION</b>The air sterilization efficiency of the nano-sized TiO(2) photocatalytic instrument should be equivalent or better as compared with the UV. This instrument might be used for the air purification and sterilization of the public locations.</p>
Texto completo:
Disponible
Índice:
WPRIM (Pacífico Occidental)
Asunto principal:
Fotoquímica
/
Titanio
/
Descontaminación
/
Desinfección
/
Nanoestructuras
/
Contaminación del Aire
/
Métodos
Idioma:
Chino
Revista:
Chinese Journal of Preventive Medicine
Año:
2008
Tipo del documento:
Artículo
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