Photocatalytic activity of white cement-based mortars with polysiloxane silicone and different doses of titanium dioxide nanoparticles
White cement-based mortars in urban areas are usually discolored and altered their esthetic properties due to air pollutants. The addition of nanoparticles in these mortars can provide photocatalytic properties that can decompose pollution agents. Likewise, other hydrophobic agents have been individ...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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Universidad de San Carlos de Guatemala
2022-06-01
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| Series: | Ciencia, Tecnología y Salud |
| Subjects: | |
| Online Access: | https://revistas.usac.edu.gt/index.php/cytes/article/view/1011 |
| _version_ | 1811344085597814784 |
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| author | Jennyfer Paiz-Rosales Edward M. A. Guerrero-Gutiérrez Susana Arrechea Luis Velasquez Roberto Diaz Shirley Torres Carmela Barrios Elvis Garcia |
| author_facet | Jennyfer Paiz-Rosales Edward M. A. Guerrero-Gutiérrez Susana Arrechea Luis Velasquez Roberto Diaz Shirley Torres Carmela Barrios Elvis Garcia |
| author_sort | Jennyfer Paiz-Rosales |
| collection | DOAJ |
| description | White cement-based mortars in urban areas are usually discolored and altered their esthetic properties due to air pollutants. The addition of nanoparticles in these mortars can provide photocatalytic properties that can decompose pollution agents. Likewise, other hydrophobic agents have been individually studied to improve outdoor building constructions. Therefore, this study presented the photocatalytic and hydrophobic effect of adding nano-TiO2 and silicone hydrophobic powder (DOWSILTM) in a white cement matrix. The nano-TiO2 were characterized by X-Ray Diffraction (XRD); afterwards, the mortar was mixed with additions of nano-TiO2 (0.0, 0.5, 1.0, 3.0%) and DOWSILTM (0.0, 0.5%). The mortar's photocatalytic performance was evaluated using a modification of the standard Italian test Ente Nazionale Italiano di Unificazione 11259:2016 based on Rhodamine B (RhB) degradation on the sample exposed to UV irradiation. Therefore, mortar samples were subjected to UV irradiation to degrade the organic dye rhodamine B, monitoring their color variation using a CIEL*a*b* spectrophotometer. Moreover, the water permeability and the contact angle were evaluated. This research demonstrates that the white cement-based mortar samples added with nano-TiO2/DOWSILTM possess photocatalytic activity. The samples with the addition of 1.0%/0.5% and 3.0%/0.5% nano-TiO2/DOWSILTM showed a higher RhB degradation for R4 and R26. Therefore, these two materials can be employed in these proportions to improve the quality of the white cement-based mortars in urban constructions.
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| first_indexed | 2024-04-13T19:41:35Z |
| format | Article |
| id | doaj.art-c5bf6117732847228dbd3c0a18c36ad2 |
| institution | Directory Open Access Journal |
| issn | 2410-6356 2409-3459 |
| language | English |
| last_indexed | 2024-04-13T19:41:35Z |
| publishDate | 2022-06-01 |
| publisher | Universidad de San Carlos de Guatemala |
| record_format | Article |
| series | Ciencia, Tecnología y Salud |
| spelling | doaj.art-c5bf6117732847228dbd3c0a18c36ad22022-12-22T02:32:52ZengUniversidad de San Carlos de GuatemalaCiencia, Tecnología y Salud2410-63562409-34592022-06-019110.36829/63CTS.v9i1.1011Photocatalytic activity of white cement-based mortars with polysiloxane silicone and different doses of titanium dioxide nanoparticles Jennyfer Paiz-Rosales0Edward M. A. Guerrero-Gutiérrez1Susana Arrechea2Luis Velasquez3Roberto Diaz4Shirley Torres5Carmela Barrios6Elvis Garcia7Escuela de Ingeniería Química, Facultad de Ingeniería, Universidad de San Carlos de GuatemalaEscuela de Ingeniería Química, Facultad de Ingeniería, Universidad de San Carlos de GuatemalaEscuela de Ingeniería Química, Facultad de Ingeniería, Universidad de San Carlos de GuatemalaCentro de Investigación y Desarrollo CETEC, Cementos ProgresoCentro de Investigación y Desarrollo CETEC, Cementos ProgresoCentro de Investigación y Desarrollo CETEC, Cementos ProgresoCentro de Investigación y Desarrollo CETEC, Cementos ProgresoCentro de Investigación y Desarrollo CETEC, Cementos ProgresoWhite cement-based mortars in urban areas are usually discolored and altered their esthetic properties due to air pollutants. The addition of nanoparticles in these mortars can provide photocatalytic properties that can decompose pollution agents. Likewise, other hydrophobic agents have been individually studied to improve outdoor building constructions. Therefore, this study presented the photocatalytic and hydrophobic effect of adding nano-TiO2 and silicone hydrophobic powder (DOWSILTM) in a white cement matrix. The nano-TiO2 were characterized by X-Ray Diffraction (XRD); afterwards, the mortar was mixed with additions of nano-TiO2 (0.0, 0.5, 1.0, 3.0%) and DOWSILTM (0.0, 0.5%). The mortar's photocatalytic performance was evaluated using a modification of the standard Italian test Ente Nazionale Italiano di Unificazione 11259:2016 based on Rhodamine B (RhB) degradation on the sample exposed to UV irradiation. Therefore, mortar samples were subjected to UV irradiation to degrade the organic dye rhodamine B, monitoring their color variation using a CIEL*a*b* spectrophotometer. Moreover, the water permeability and the contact angle were evaluated. This research demonstrates that the white cement-based mortar samples added with nano-TiO2/DOWSILTM possess photocatalytic activity. The samples with the addition of 1.0%/0.5% and 3.0%/0.5% nano-TiO2/DOWSILTM showed a higher RhB degradation for R4 and R26. Therefore, these two materials can be employed in these proportions to improve the quality of the white cement-based mortars in urban constructions. https://revistas.usac.edu.gt/index.php/cytes/article/view/1011MortarsCementSelf-CleaningNano-TiO2Hydrophobic |
| spellingShingle | Jennyfer Paiz-Rosales Edward M. A. Guerrero-Gutiérrez Susana Arrechea Luis Velasquez Roberto Diaz Shirley Torres Carmela Barrios Elvis Garcia Photocatalytic activity of white cement-based mortars with polysiloxane silicone and different doses of titanium dioxide nanoparticles Ciencia, Tecnología y Salud Mortars Cement Self-Cleaning Nano-TiO2 Hydrophobic |
| title | Photocatalytic activity of white cement-based mortars with polysiloxane silicone and different doses of titanium dioxide nanoparticles |
| title_full | Photocatalytic activity of white cement-based mortars with polysiloxane silicone and different doses of titanium dioxide nanoparticles |
| title_fullStr | Photocatalytic activity of white cement-based mortars with polysiloxane silicone and different doses of titanium dioxide nanoparticles |
| title_full_unstemmed | Photocatalytic activity of white cement-based mortars with polysiloxane silicone and different doses of titanium dioxide nanoparticles |
| title_short | Photocatalytic activity of white cement-based mortars with polysiloxane silicone and different doses of titanium dioxide nanoparticles |
| title_sort | photocatalytic activity of white cement based mortars with polysiloxane silicone and different doses of titanium dioxide nanoparticles |
| topic | Mortars Cement Self-Cleaning Nano-TiO2 Hydrophobic |
| url | https://revistas.usac.edu.gt/index.php/cytes/article/view/1011 |
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