Evaluation of Bactericidal Activity of Electrochemical GO Modified with TiO2 Nanoparticles
| dc.creator | Durango Giraldo*, Geraldine | |
| dc.creator | Zapata-Hernández, Juan Camilo | |
| dc.creator | Betancur Henao, Claudia | |
| dc.creator | Santa Marín, Juan Felipe | |
| dc.creator | Buitrago Sierra, Robison | |
| dc.date | 2023-12-29 | |
| dc.date.accessioned | 2025-10-01T23:53:09Z | |
| dc.description | Recently, antibacterial materials have sparked a renewed interest in the fields of biomedical engineering and life sciences. The main purpose of this study was to evaluate the physicochemical properties of TiO2 nanoparticles with anatase phase and an average size of 24.1 ± 4.6 nm, graphene oxide (GO) obtained from the electrochemical method, and TiO2/GO hybrid nanomaterial. Thermogravimetric analysis (TGA) revealed the presence of oxygen functionalities in the GO structure and 23.2 % of TiO2 in the hybrid nanomaterial, as well as a strong interaction between the materials that can be observed in the micrograph of scanning electron microscopy (SEM). Antibacterial tests were performed using the macrodilution method. The results showed that, while GO did not decrease bacterial growth, TiO2 presented high bactericidal activity. In turn, the hybrid TiO2/GO nanomaterial did not show such activity. This result can be explained by the decrease in contact between TiO2 and bacterial cells due to the blocking of the active sites on the TiO2 surface by graphene oxide sheets. These results contribute to the ongoing discussion about the bactericidal properties of graphene oxide. | en-US |
| dc.description | Recientemente, los materiales antibacterianos han despertado un renovado interés en el campo de la ingeniería biomédica y las ciencias de la vida. El objetivo de este estudio consistió en evaluar las propiedades fisicoquímicas de nanopartículas de TiO2 fase anatasa y un tamaño medio de 24.1 ± 4.6 nm, óxido de grafeno (GO) obtenido a partir del método electroquímico y un nanomaterial hibrido TiO2/GO. El análisis termogravimétrico (TGA) reveló la presencia de funcionalidades de oxígeno en la estructura del GO, y se encontró un 23.2 % de TiO2 en el nanomaterial híbrido y una fuerte interacción entre los materiales que puede observarse en las micrografías de microscopia electrónica de barrido (SEM). Las pruebas antibacterianas fueron realizadas usando el método de macrodilución. Los resultados evidenciaron que, mientras que el GO no disminuyó el crecimiento bacteriano, el TiO2 presentó una alta actividad bactericida. A su vez, el nanomaterial híbrido TiO2/GO no mostró dicha actividad. Este resultado puede explicarse por la disminución del contacto entre el TiO2 y las células bacterianas debido al bloqueo de los sitios activos en la superficie del TiO2 por las láminas de óxido de grafeno. Estos resultados contribuyen a la discusión en curso sobre las propiedades bactericidas del óxido de grafeno. | es-ES |
| dc.format | application/pdf | |
| dc.format | application/zip | |
| dc.format | text/xml | |
| dc.format | text/html | |
| dc.identifier | https://revistas.itm.edu.co/index.php/tecnologicas/article/view/2765 | |
| dc.identifier | 10.22430/22565337.2765 | |
| dc.identifier.uri | https://hdl.handle.net/20.500.12622/7880 | |
| dc.language | eng | |
| dc.publisher | Instituto Tecnológico Metropolitano (ITM) | es-ES |
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| dc.rights | Derechos de autor 2023 TecnoLógicas | es-ES |
| dc.rights | https://creativecommons.org/licenses/by-nc-sa/4.0 | es-ES |
| dc.source | TecnoLógicas; Vol. 26 No. 58 (2023); e2765 | en-US |
| dc.source | TecnoLógicas; Vol. 26 Núm. 58 (2023); e2765 | es-ES |
| dc.source | 2256-5337 | |
| dc.source | 0123-7799 | |
| dc.subject | Actividad bactericida | es-ES |
| dc.subject | nanomaterial híbrido | es-ES |
| dc.subject | óxido de grafeno | es-ES |
| dc.subject | dióxido de titanio | es-ES |
| dc.subject | bacterial activity | en-US |
| dc.subject | hybrid nanomaterial | en-US |
| dc.subject | graphene oxide | en-US |
| dc.subject | titanium dioxide | en-US |
| dc.title | Evaluation of Bactericidal Activity of Electrochemical GO Modified with TiO2 Nanoparticles | en-US |
| dc.title | Evaluación de la actividad bactericida de GO electroquímico modificado con nanopartículas de TiO2 | es-ES |
| dc.type | info:eu-repo/semantics/article | |
| dc.type | info:eu-repo/semantics/publishedVersion | |
| dc.type | Research Papers | en-US |
| dc.type | Artículos de investigación | es-ES |
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