abstract
Titanium dioxide is frequently used for the photocatalytic degradation of organic and inorganic pollutants present in the air, such as NOx. In this work, biomorphic anatase-based plates were manufactured using paper as an innovative template for fixation of TiO2. Ceramics with microstructure similar to paper were produced by infiltration of titanium isopropoxide (TTiP) and dopants, followed by hydrolysis in NH4OH, air drying, and calcination at temperatures up to 1000 degrees C. After heat treatment, the samples were characterized by XRD, TG/DTA, BET, EPR, and SEM. Anatase was obtained as the major phase at 800 degrees C and remained present up to 1000 degrees C. In tests of photocatalytic efficiency of produced plates for degradation of NOx gases, the best performance was obtained with a biomorphic anatase-based plate prepared using TTiP doped with 5% Zr4+, corresponding to 100% degradation of NOx in 35 min. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
keywords
TIO2 PHOTOCATALYSIS; TITANIUM-DIOXIDE; NITROGEN-OXIDES; DEGRADATION; CERAMICS; TRANSFORMATION; NANOPARTICLES; EPR
subject category
Materials Science
authors
Silvestri, S; Szpoganicz, B; Schultz, J; Mangrich, AS; Hotza, D; Garcia, DE; Labrincha, JA
our authors
João António Labrincha Baptista
Full professoracknowledgements
The authors gratefully acknowledge the financial support provided by the Brazilian funding agency Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq, under grant number 400569/2013-2), and Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES), Institute Nacional de Ciencia e Tecnologia (INCT catalise) and Laboratorio de Catalise e Fenomenos Interfaciais (LACFI- UFSC) are also gratefully acknowledged for their support.