Performance and stability of femtosecond laser-irradiated Fe2O3 materials as photocatalysts for methylene blue dye discoloration
The disposal of substances pollutant, such as methylene blue dye (MB), into wastewater, arouses the interest of technologies to remove these pollutants. The discoloration of MB by photocatalysis and using femtosecond laser-irradiated Fe2O3 materials as photocatalysts proved to be a promising way to...
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| Format: | Article |
| Language: | English |
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Universidade Estadual Paulista
2022-04-01
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| Series: | Eclética Química |
| Online Access: | https://revista.iq.unesp.br/ojs/index.php/ecletica/article/view/1266 |
| _version_ | 1811322833530257408 |
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| author | Josiane Carneiro Souza Tiago Almeida Martins Regiane Cristina de Oliveira Julio Ricardo Sambrano Cleber Renato Mendonça Leonardo de Boni Edson Roberto Leite Elson Longo |
| author_facet | Josiane Carneiro Souza Tiago Almeida Martins Regiane Cristina de Oliveira Julio Ricardo Sambrano Cleber Renato Mendonça Leonardo de Boni Edson Roberto Leite Elson Longo |
| author_sort | Josiane Carneiro Souza |
| collection | DOAJ |
| description | The disposal of substances pollutant, such as methylene blue dye (MB), into wastewater, arouses the interest of technologies to remove these pollutants. The discoloration of MB by photocatalysis and using femtosecond laser-irradiated Fe2O3 materials as photocatalysts proved to be a promising way to treat this pollutant. Here, Fe2O3 obtained by the conventional hydrothermal process and heat-treatment, subsequently femtosecond laser-irradiated treatment. Materials obtained with a mixture of irradiated α-Fe2O3 and ε-Fe2O3 phases revealed lower crystallinity than irradiated α-Fe2O3 samples. The irradiation treatment and the increase in crystallinity were crucial to improve the performance of α-Fe2O3 irradiated sample in the discoloration of MB, which reached 90% in 75 min of dye solution exposure under UV irradiation. The irradiation treatment proved to allow greater exposure of the particle surfaces, which coalesced and presented a greater distribution of medium size, indicating a more heterogeneous morphology in the irradiated samples. As a result, there was an increase in active sites due to the density of defects generated, which facilitated the dye degradation process. |
| first_indexed | 2024-04-13T13:42:07Z |
| format | Article |
| id | doaj.art-3b4fddd6481e409da3472a2988e0f9df |
| institution | Directory Open Access Journal |
| issn | 0100-4670 1678-4618 |
| language | English |
| last_indexed | 2024-04-13T13:42:07Z |
| publishDate | 2022-04-01 |
| publisher | Universidade Estadual Paulista |
| record_format | Article |
| series | Eclética Química |
| spelling | doaj.art-3b4fddd6481e409da3472a2988e0f9df2022-12-22T02:44:35ZengUniversidade Estadual PaulistaEclética Química0100-46701678-46182022-04-01471SI10511910.26850/1678-4618eqj.v47.1SI.2022.p105-119682Performance and stability of femtosecond laser-irradiated Fe2O3 materials as photocatalysts for methylene blue dye discolorationJosiane Carneiro Souza0https://orcid.org/0000-0002-6144-6773Tiago Almeida Martins1https://orcid.org/0000-0002-4935-9490Regiane Cristina de Oliveira2https://orcid.org/0000-0002-7332-8731Julio Ricardo Sambrano3https://orcid.org/0000-0002-5217-7145Cleber Renato Mendonça4https://orcid.org/0000-0001-6672-2186Leonardo de Boni5https://orcid.org/0000-0002-1875-1852Edson Roberto Leite6https://orcid.org/0000-0002-0513-9939Elson Longo7https://orcid.org/0000-0001-8062-7791Federal University of São Carlos, Center for the Development of Functional Materials, São Carlos, Brazil.Federal University of São Carlos, Center for the Development of Functional Materials, São Carlos, Brazil.São Paulo State University, Faculty of Science, Bauru, Brazil.São Paulo State University, Faculty of Science, Bauru, Brazil.University of São Paulo, Institute of Physics, São Carlos, Brazil.University of São Paulo, Institute of Physics, São Carlos, Brazil.Federal University of São Carlos, Center for the Development of Functional Materials, São Carlos, Brazil.Federal University of São Carlos, Center for the Development of Functional Materials, São Carlos, Brazil.The disposal of substances pollutant, such as methylene blue dye (MB), into wastewater, arouses the interest of technologies to remove these pollutants. The discoloration of MB by photocatalysis and using femtosecond laser-irradiated Fe2O3 materials as photocatalysts proved to be a promising way to treat this pollutant. Here, Fe2O3 obtained by the conventional hydrothermal process and heat-treatment, subsequently femtosecond laser-irradiated treatment. Materials obtained with a mixture of irradiated α-Fe2O3 and ε-Fe2O3 phases revealed lower crystallinity than irradiated α-Fe2O3 samples. The irradiation treatment and the increase in crystallinity were crucial to improve the performance of α-Fe2O3 irradiated sample in the discoloration of MB, which reached 90% in 75 min of dye solution exposure under UV irradiation. The irradiation treatment proved to allow greater exposure of the particle surfaces, which coalesced and presented a greater distribution of medium size, indicating a more heterogeneous morphology in the irradiated samples. As a result, there was an increase in active sites due to the density of defects generated, which facilitated the dye degradation process.https://revista.iq.unesp.br/ojs/index.php/ecletica/article/view/1266 |
| spellingShingle | Josiane Carneiro Souza Tiago Almeida Martins Regiane Cristina de Oliveira Julio Ricardo Sambrano Cleber Renato Mendonça Leonardo de Boni Edson Roberto Leite Elson Longo Performance and stability of femtosecond laser-irradiated Fe2O3 materials as photocatalysts for methylene blue dye discoloration Eclética Química |
| title | Performance and stability of femtosecond laser-irradiated Fe2O3 materials as photocatalysts for methylene blue dye discoloration |
| title_full | Performance and stability of femtosecond laser-irradiated Fe2O3 materials as photocatalysts for methylene blue dye discoloration |
| title_fullStr | Performance and stability of femtosecond laser-irradiated Fe2O3 materials as photocatalysts for methylene blue dye discoloration |
| title_full_unstemmed | Performance and stability of femtosecond laser-irradiated Fe2O3 materials as photocatalysts for methylene blue dye discoloration |
| title_short | Performance and stability of femtosecond laser-irradiated Fe2O3 materials as photocatalysts for methylene blue dye discoloration |
| title_sort | performance and stability of femtosecond laser irradiated fe2o3 materials as photocatalysts for methylene blue dye discoloration |
| url | https://revista.iq.unesp.br/ojs/index.php/ecletica/article/view/1266 |
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