Evaluation of visible light photocatalysts for indoor air purification

MARÍA DE LOS MILAGROS BALLARI; JOAQUÍN CARBALLADA; QINGLIANG YU; JOS H.J.H. BROUWERS; ORLANDO M. ALFANO; ALBERTO E. CASSANO

Jacksonville

Conferencia; The 17th International Conference on Semiconductor Photocatalysis and Solar Energy Conversion (SPASEC-17); 2012

Redox Technologies, Inc.

In the present work, two different visible light TiO2 commercially available, one doped with carbon and the other one doped with nitrogen, are studied. The main objective of this work is to determine which photocatalyst will present the best pollution abating ability in a full scale application under real indoor conditions. To do that the TiO2 powders were immobilized on borosilicate glass plates according to a dip coating method. Then, the photocatalytic performance of these plates under visible light was evaluated in a continuous gas flat plate photoreactor using nitrogen oxide gas (NO) as the pollutant. The photocatalytic NOx degradation by immobilized TiO2 powders was related with their optical properties under visible light, finding a clear correlation between them.