Effect of processing variables on the photocatalytic properties of ZnO thin films prepared using the polymeric precursor method

Autor(es)

Carvalho, Kele T. G. ; Fidelis, Suzane C. ; Lopes, Osmando F. ; Ribeiro, Caue

• Tipo de documento: Artigo Científico
• Fonte: CERAMICS INTERNATIONAL; v. 41, n. 9, p. 8-pg., 2015-11-01.

Resumo

The preparation of ZnO thin films using the polymeric precursor method is reported, and the influence of the thickness and calcination temperature on their effective photocatalytic activity was analyzed. The ZnO thin films were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), diffuse reflectance UV-vis spectroscopy (UV-DRS), and atomic force microscopy (AFM). Thicker films with a lower calcination temperature exhibited better photoactivity for RhB photodegradation under UV irradiation. The average particle size increased from 14 to 45 nm as the calcination temperature increased from 400 to 600 degrees C. In addition, the stability results indicated no significant deactivation even after four successive re-uses in RhB photodegradation. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved. (AU)

• Processo FAPESP: 13/13888-0 - Síntese de nano-heteroestruturas de BiVO4/óxidos de bismuto e avaliação de suas propriedades fotocatalíticas.
• Beneficiário: Osmando Ferreira Lopes
• Modalidade de apoio: Bolsas no Brasil - Doutorado