STUDY OF THE PHOTOCATALITIC ACTIVITY OF MnO2 / In2O3 THIN FILMS OBTAINED BY SPIN COATING IN THE DEGRADATION OF THE METHYLENE BLUE DYE

Reference Presenter Authors
(Institution)
Abstract
06-178 laurenia martins p. garcia Ferreira, T.L.(Universidade Federal do Rio Grande do Norte); garcia, l.m.(Universidade Federal do Rio Grande do Norte); Rodrigues, M.H.(Universidade Federal de Goiás); Godinho, M.J.(Universidade Federal de São Carlos); Gurgel, G.H.(Universidade Federal do Rio Grande do Norte); Nascimento, R.M.(Federal University of Rio Grande do Norte); Bomio, M.R.(Universidade Federal do Rio Grande do Norte); Motta, F.V.(Universidade Federal do Rio Grande do Norte); The production of thin films with photocatalytic properties from semiconductor materials presents great potential due to the energetic characteristics of these materials. Indium oxide (In2O3) is an example of a material having such properties and, in order to improve it, other compounds having similar characteristics can be admixed thereto. This work reports the preparation of films with the objective of improving the light absorption capacity of In2O3 thin films by addition of manganese oxide (MnO2), as well as the reuse of these thin films. For this, precursor resins containing such oxides were prepared for the polymerization method of complexes and deposited on silicon substrates by the spin coating technique, forming thin films of four layers by inversion of the order of deposition of the resins. After preparation and thermal treatments at 500 and 600 ºC, the films were characterized by x-ray diffraction analysis (XRD), spectroscopy in the UV-Visible region (UV-VIS), field-emission gun scanning electron microscope (FEG-SEM), and photoluminescence spectroscopy, in which the chromatic characteristics of the films formed were obtained. From these analyses it can be observed that the order of deposition of the resin layers does not exert a strong influence on their photocatalytic properties, however, mixed film with an upper layer of manganese oxide and calcined at 500 °C showed greater degradation of the methylene blue dye, even after 3 cycles of reuse.
<< Back
Copyright © 2019 Metallum. All rights reserved.
Site produced by: SITESP.NET