SiO2-TiO2 Films Supported on Ignimbrite by Spray Coating for the Photocatalytic Degradation of NOx Gas and Methyl Orange Dye
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 Ti...
| Authors: | , , , , , , , |
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| Format: | article |
| Publication Date: | 2020 |
| Country: | Perú |
| Institution: | Universidad Nacional de Ingeniería |
| Repository: | UNI-Tesis |
| Language: | English |
| OAI Identifier: | oai:cybertesis.uni.edu.pe:20.500.14076/29122 |
| Online Access: | http://hdl.handle.net/20.500.14076/29122 https://doi.org/10.1155/2020/4756952 |
| Access Level: | Open access |
| Keyword: | Spray-coating technique Field emission scanning electron microscopy (FE-SEM) Photocatalytic https://purl.org/pe-repo/ocde/ford#1.03.01 |
| Summary: | 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, NOx gas degradation was studied. The obtained results evidenced that the SiO2 and TiO2 coating improved the photocatalytic activity of ignimbrite. |
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