Green Synthesis via <i>Eucalyptus globulus</i> L. Extract of Ag-TiO<sub>2</sub> Catalyst: Antimicrobial Activity Evaluation toward Water Disinfection Process
The problem of water pollution by persistent substances and microorganisms requires solutions that materials such as silver-modified titanium dioxide can provide due to their excellent photocatalytic and antimicrobial properties. However, the synthesis methods conventionally used to obtain these mat...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-06-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/12/11/1944 |
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| author | Jacqueline Torres-Limiñana Ana A. Feregrino-Pérez Marina Vega-González Luis Escobar-Alarcón José Antonio Cervantes-Chávez Karen Esquivel |
| author_facet | Jacqueline Torres-Limiñana Ana A. Feregrino-Pérez Marina Vega-González Luis Escobar-Alarcón José Antonio Cervantes-Chávez Karen Esquivel |
| author_sort | Jacqueline Torres-Limiñana |
| collection | DOAJ |
| description | The problem of water pollution by persistent substances and microorganisms requires solutions that materials such as silver-modified titanium dioxide can provide due to their excellent photocatalytic and antimicrobial properties. However, the synthesis methods conventionally used to obtain these materials involve toxic chemical reagents such as sodium borohydride (NaBH<sub>4</sub>). The search for alternative synthesis methods that use environmentally friendly substances, such as the biosynthesis method, was evaluated. Silver-titanium dioxide (Ag-TiO<sub>2</sub>) was synthesized by a <i>Eucalyptus globulus</i> L. extract as a reductive agent through sol-gel and microwave-assisted sol-gel processes. Four different solvents were tested to extract secondary metabolites to determine their roles in reducing silver nanoparticles. Titanium dioxide nanoparticles with sizes from 11 to 14 nm were obtained in the anatase phase, and no narrowing of the bandgap was observed (3.1–3.2 eV) for the Ag-TiO<sub>2</sub> materials compared with the pure TiO<sub>2</sub>. Interestingly, the bacterial inhibition values were close to 100%, suggesting an effective antimicrobial mechanism related to the properties of silver. Finally, by the physicochemical characterization of the materials and their antimicrobial properties, it was possible to obtain a suitable biosynthesized Ag-TiO<sub>2</sub> material as a green option for water disinfection that may be compared to the conventional methods. |
| first_indexed | 2024-03-10T01:00:34Z |
| format | Article |
| id | doaj.art-57aa0eaea2dc415b8813ed84351f9e42 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-10T01:00:34Z |
| publishDate | 2022-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-57aa0eaea2dc415b8813ed84351f9e422023-11-23T14:34:44ZengMDPI AGNanomaterials2079-49912022-06-011211194410.3390/nano12111944Green Synthesis via <i>Eucalyptus globulus</i> L. Extract of Ag-TiO<sub>2</sub> Catalyst: Antimicrobial Activity Evaluation toward Water Disinfection ProcessJacqueline Torres-Limiñana0Ana A. Feregrino-Pérez1Marina Vega-González2Luis Escobar-Alarcón3José Antonio Cervantes-Chávez4Karen Esquivel5División de Investigación y Posgrado, Facultad de Ingeniería, Universidad Autónoma de Querétaro, Cerro de las Campanas, Santiago de Queretaro 76010, MexicoDivisión de Investigación y Posgrado, Facultad de Ingeniería, Universidad Autónoma de Querétaro, Cerro de las Campanas, Santiago de Queretaro 76010, MexicoCentro de Geociencias, Universidad Nacional Autónoma de México, Campus Juriquilla. Blvd. Juriquilla, 3001, Santiago de Queretaro 76230, MexicoDepartamento de Física, ININ, Carr. México-Toluca, La Marquesa, Ocoyoacac 52750, MexicoFacultad de Ciencias Naturales, Universidad Autónoma de Querétaro, Carr. Chichimequillas-Anillo Vial Fray Junípero Serra, Km 8, Santiago de Queretaro 76000, MexicoDivisión de Investigación y Posgrado, Facultad de Ingeniería, Universidad Autónoma de Querétaro, Cerro de las Campanas, Santiago de Queretaro 76010, MexicoThe problem of water pollution by persistent substances and microorganisms requires solutions that materials such as silver-modified titanium dioxide can provide due to their excellent photocatalytic and antimicrobial properties. However, the synthesis methods conventionally used to obtain these materials involve toxic chemical reagents such as sodium borohydride (NaBH<sub>4</sub>). The search for alternative synthesis methods that use environmentally friendly substances, such as the biosynthesis method, was evaluated. Silver-titanium dioxide (Ag-TiO<sub>2</sub>) was synthesized by a <i>Eucalyptus globulus</i> L. extract as a reductive agent through sol-gel and microwave-assisted sol-gel processes. Four different solvents were tested to extract secondary metabolites to determine their roles in reducing silver nanoparticles. Titanium dioxide nanoparticles with sizes from 11 to 14 nm were obtained in the anatase phase, and no narrowing of the bandgap was observed (3.1–3.2 eV) for the Ag-TiO<sub>2</sub> materials compared with the pure TiO<sub>2</sub>. Interestingly, the bacterial inhibition values were close to 100%, suggesting an effective antimicrobial mechanism related to the properties of silver. Finally, by the physicochemical characterization of the materials and their antimicrobial properties, it was possible to obtain a suitable biosynthesized Ag-TiO<sub>2</sub> material as a green option for water disinfection that may be compared to the conventional methods.https://www.mdpi.com/2079-4991/12/11/1944antimicrobial activitycatalyst<i>Eucalyptus globulus</i> L.green synthesissilver nanoparticlestitanium dioxide |
| spellingShingle | Jacqueline Torres-Limiñana Ana A. Feregrino-Pérez Marina Vega-González Luis Escobar-Alarcón José Antonio Cervantes-Chávez Karen Esquivel Green Synthesis via <i>Eucalyptus globulus</i> L. Extract of Ag-TiO<sub>2</sub> Catalyst: Antimicrobial Activity Evaluation toward Water Disinfection Process Nanomaterials antimicrobial activity catalyst <i>Eucalyptus globulus</i> L. green synthesis silver nanoparticles titanium dioxide |
| title | Green Synthesis via <i>Eucalyptus globulus</i> L. Extract of Ag-TiO<sub>2</sub> Catalyst: Antimicrobial Activity Evaluation toward Water Disinfection Process |
| title_full | Green Synthesis via <i>Eucalyptus globulus</i> L. Extract of Ag-TiO<sub>2</sub> Catalyst: Antimicrobial Activity Evaluation toward Water Disinfection Process |
| title_fullStr | Green Synthesis via <i>Eucalyptus globulus</i> L. Extract of Ag-TiO<sub>2</sub> Catalyst: Antimicrobial Activity Evaluation toward Water Disinfection Process |
| title_full_unstemmed | Green Synthesis via <i>Eucalyptus globulus</i> L. Extract of Ag-TiO<sub>2</sub> Catalyst: Antimicrobial Activity Evaluation toward Water Disinfection Process |
| title_short | Green Synthesis via <i>Eucalyptus globulus</i> L. Extract of Ag-TiO<sub>2</sub> Catalyst: Antimicrobial Activity Evaluation toward Water Disinfection Process |
| title_sort | green synthesis via i eucalyptus globulus i l extract of ag tio sub 2 sub catalyst antimicrobial activity evaluation toward water disinfection process |
| topic | antimicrobial activity catalyst <i>Eucalyptus globulus</i> L. green synthesis silver nanoparticles titanium dioxide |
| url | https://www.mdpi.com/2079-4991/12/11/1944 |
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