Crystallization of hollow TiO2 into anatase at mild conditions, for improved surface recognition in selective photocatalysis

• Type: Article in International Scientific Journal
• Date: 2022

Authors

Ferreira, VRA (Author) Other; Manuel Azenha (Author) FCUP; Carlos M Pereira (Author) FCUP; Silva, F (Author) FCUP

Journal

Title: Applied Catalysis A: General

Vol. 648

ISSN: 0926-860X

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 5 Citations

Scopus - 5 Citations

Other information

Authenticus ID: P-00X-D32

DOI: 10.1016/j.apcata.2022.118912

Abstract (EN): The objective of this work was the exploration of low calcination temperature ranges (< 350 degrees C) 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 degrees C or 250 degrees C). It was with the calcination temperature of 250 degrees C that the highest photocatalytic efficiency was obtained, under UV irradiation, associated with the highest adsorption selectivity (alpha(K) = 19) and degradation selectivity (alpha(k) = 2.7) observed for the degradation of the template against a closely related analogue compound.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 13