Methylene Blue as a Sensitizing Dye: Enhancement of the Photocatalytic Performance of a Peroxide-Functionalized Iron Molybdate by the Antenna Effect
The use of dyes as sensitizing agents to increase semiconductor activity is a strategy already adopted in the field of heterogeneous photocatalysis, but the compounds applied are noble metal-based and sometimes difficult to synthesize, which make it more expensive. In this work, it was discovered th...
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2025-04-01
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| author | José Balena G. Filho Clóvis G. Vieira Daniel B. de Jesus Henrique F. V. Victória Edmar A. Soares Klaus Krambrock Márcio César Pereira Luiz Carlos A. Oliveira |
| author_facet | José Balena G. Filho Clóvis G. Vieira Daniel B. de Jesus Henrique F. V. Victória Edmar A. Soares Klaus Krambrock Márcio César Pereira Luiz Carlos A. Oliveira |
| author_sort | José Balena G. Filho |
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| description | The use of dyes as sensitizing agents to increase semiconductor activity is a strategy already adopted in the field of heterogeneous photocatalysis, but the compounds applied are noble metal-based and sometimes difficult to synthesize, which make it more expensive. In this work, it was discovered that methylene blue can perform such an effect on an iron molybdate functionalized with peroxo groups on the surface. This material, called MoOxoFe, was tested together with its analogue MoFe (produced without H<sub>2</sub>O<sub>2</sub> in the synthesis) in the degradation of methylene blue. The rapid degradation of the dye led to the hypothesis of sensitization, which was investigated and proven by additional photocatalytic tests with sensitized material, MoOxoFe-MB, and spectroscopies, such as EPR and XPS. |
| format | Article |
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| institution | Kabale University |
| issn | 2079-6447 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | MDPI AG |
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| series | Colorants |
| spelling | doaj-art-e98d1a961aa64462a117957cacda10f72025-08-20T03:27:15ZengMDPI AGColorants2079-64472025-04-01421410.3390/colorants4020014Methylene Blue as a Sensitizing Dye: Enhancement of the Photocatalytic Performance of a Peroxide-Functionalized Iron Molybdate by the Antenna EffectJosé Balena G. Filho0Clóvis G. Vieira1Daniel B. de Jesus2Henrique F. V. Victória3Edmar A. Soares4Klaus Krambrock5Márcio César Pereira6Luiz Carlos A. Oliveira7Department of Chemistry, Federal University of Minas Gerais (UFMG), Belo Horizonte 31270-901, MG, BrazilDepartment of Physics, Federal University of Minas Gerais (UFMG), Belo Horizonte 31270-901, MG, BrazilDepartment of Physics, Federal University of Minas Gerais (UFMG), Belo Horizonte 31270-901, MG, BrazilDepartment of Physics, Federal University of Minas Gerais (UFMG), Belo Horizonte 31270-901, MG, BrazilDepartment of Physics, Federal University of Minas Gerais (UFMG), Belo Horizonte 31270-901, MG, BrazilDepartment of Physics, Federal University of Minas Gerais (UFMG), Belo Horizonte 31270-901, MG, BrazilInstitute of Science, Engineering and Technology, Federal University of Jequitinhonha and Mucuri (UFVJM), Teófilo Otoni 39803-371, MG, BrazilDepartment of Chemistry, Federal University of Minas Gerais (UFMG), Belo Horizonte 31270-901, MG, BrazilThe use of dyes as sensitizing agents to increase semiconductor activity is a strategy already adopted in the field of heterogeneous photocatalysis, but the compounds applied are noble metal-based and sometimes difficult to synthesize, which make it more expensive. In this work, it was discovered that methylene blue can perform such an effect on an iron molybdate functionalized with peroxo groups on the surface. This material, called MoOxoFe, was tested together with its analogue MoFe (produced without H<sub>2</sub>O<sub>2</sub> in the synthesis) in the degradation of methylene blue. The rapid degradation of the dye led to the hypothesis of sensitization, which was investigated and proven by additional photocatalytic tests with sensitized material, MoOxoFe-MB, and spectroscopies, such as EPR and XPS.https://www.mdpi.com/2079-6447/4/2/14methylene blue dyeheterogeneous photocatalysisiron molybdatedye sensitizationsurface interactions |
| spellingShingle | José Balena G. Filho Clóvis G. Vieira Daniel B. de Jesus Henrique F. V. Victória Edmar A. Soares Klaus Krambrock Márcio César Pereira Luiz Carlos A. Oliveira Methylene Blue as a Sensitizing Dye: Enhancement of the Photocatalytic Performance of a Peroxide-Functionalized Iron Molybdate by the Antenna Effect Colorants methylene blue dye heterogeneous photocatalysis iron molybdate dye sensitization surface interactions |
| title | Methylene Blue as a Sensitizing Dye: Enhancement of the Photocatalytic Performance of a Peroxide-Functionalized Iron Molybdate by the Antenna Effect |
| title_full | Methylene Blue as a Sensitizing Dye: Enhancement of the Photocatalytic Performance of a Peroxide-Functionalized Iron Molybdate by the Antenna Effect |
| title_fullStr | Methylene Blue as a Sensitizing Dye: Enhancement of the Photocatalytic Performance of a Peroxide-Functionalized Iron Molybdate by the Antenna Effect |
| title_full_unstemmed | Methylene Blue as a Sensitizing Dye: Enhancement of the Photocatalytic Performance of a Peroxide-Functionalized Iron Molybdate by the Antenna Effect |
| title_short | Methylene Blue as a Sensitizing Dye: Enhancement of the Photocatalytic Performance of a Peroxide-Functionalized Iron Molybdate by the Antenna Effect |
| title_sort | methylene blue as a sensitizing dye enhancement of the photocatalytic performance of a peroxide functionalized iron molybdate by the antenna effect |
| topic | methylene blue dye heterogeneous photocatalysis iron molybdate dye sensitization surface interactions |
| url | https://www.mdpi.com/2079-6447/4/2/14 |
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