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The objective of this work was the exploration of low calcination temperature ranges (< 350 ºC) to obtain molecularly imprinted microspheres (MIM) with a high crystallinity as anatase, in cooperation of an acidic pretreatment aiming at the preservation of the hollow shape and also of the selective binding sites. It was confirmed the possibility of obtaining bilirubin-imprinted crystalline TiO2 microspheres (highly crystalline anatase, as confirmed by XRD) exhibiting higher photocatalytic efficiency associated especially with the hollow shape and calcination at lower temperatures (200 ºC or 250 ºC). It was with the calcination temperature of 250 ºC that the highest photocatalytic efficiency was obtained, under UV irradiation, associated with the highest adsorption selectivity (α(K) = 19) and degradation selectivity (α(k) = 2.7) observed for the degradation of the template against a closely related analogue compound.
Ferreira et al. (Thu,) studied this question.