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Photocatalytic degradation of acridine dyes using anatase and rutile TiO2.

Journal of environmental management (2012-03-06)
C E Zubieta, P V Messina, P C Schulz
ABSTRACT

The adsorption and photodegradation of acridine orange (AO) and acriflavine (AF) dyes on two mesoporous titania crystalline phases, anatase and rutile, were experimentally studied. Anatase and rutile were characterized by nitrogen adsorption, electron scanning and transmission microscopy, and X-ray diffraction. The adsorption capacity of rutile was higher than that of anatase, while the reverse is observed for photodegradation of both dyes. The adsorption of AF on both adsorbents was higher than that of AO, which was related with the smaller size of AF molecules compared with those of AO, therefore the access of AF to the adsorption sites is favored.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Acriflavine hydrochloride
Sigma-Aldrich
Acriflavine
Sigma-Aldrich
Acriflavine, BioReagent, suitable for fluorescence, ≥90% (AT)