SiO2-TiO2 Films Supported on Ignimbrite by Spray Coating for the Photocatalytic Degradation of NOx Gas and Methyl Orange Dye. (29th January 2020)

• Record Type: Journal Article
• Authors: Florez, Daily Maria Magdalena Gallegos; Ale, Rivalino Benicio Guzman; Idme, Albeniz Ferdinand Huaracallo; Alarcon, Luis Antonio Lazo; Huallpa, Edgar Apaza; Castro, Yolanda; Apestegui, Pierre Giovanny Ramos; Rodriguez Rodriguez, Juan Martin
• Other Names: Li Jinliang Guest Editor.
• Is Part Of: International journal of photoenergy. Volume 2020(2020)
• Publication Date: 2020-01-29
• Subjects: Photochemistry -- Periodicals; Photobiology -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Photochimie; Photobiologie; Chimie physique et théorique; Chemistry, Physical and theoretical; Photobiology; Photochemistry; Electronic journals; Periodicals; 541.35
• DOI: 10.1155/2020/4756952
• Languages: English
• ISSNs: 1110-662X

Abstract

Abstract : In this work, a SiO2 -TiO2 coating, composed of different numbers of TiO2 and SiO2 layers, was fabricated by a spray-coating technique. The films were deposited onto ignimbrite rock and divided into two groups according to the number of SiO2 layers applied, 10 and 15 layers of SiO2 and 5 layers of TiO2 for each group. The morphology and chemical composition of the synthesized samples were characterized by field emission scanning electron microscopy (FE-SEM) and energy dispersive X-ray spectrometer (EDS), which reveal the successful SiO2 -TiO2 coating on ignimbrite. The photocatalytic activities of samples obtained were evaluated toward the decomposition of 3 ppm of methyl orange (MO). Finally, NO x gas degradation was studied. The obtained results evidenced that the SiO2 and TiO2 coating improved the photocatalytic activity of ignimbrite.