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Photocatalytic activity under visible light of Ni:TiO2-NiTiO3 synthesized through a modified sol-gel method

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Abstract

One of the most challenging goals in materials science is to shift the absorption band of TiO2 toward the visible region of the electromagnetic spectrum. This is a fundamental strategy to improve its photocatalytic performance. In this paper, we present a simple methodology based on the sol-gel method, which allows the displacement of the band edge of TiO2, accompanied by the appearance of additional absorption bands in the optical spectrum. In our methodology, TiO2 was synthesized and doped with 5% and 10% w/w nickel. The resulting material was dried at 100 °C and subjected to thermal treatment at 500 °C for 1 h each. The obtained material was characterized by scanning electron microscopy, thermogravimetric analysis, differential scanning calorimetry, diffuse reflectance, X-ray diffraction, Raman spectroscopy, and XPS. Our results indicate that Ni doping of TiO2 was successfully carried out, while NiTiO3 appears from the first drying stage at 100 °C and undergoes the transition from the amorphous to the crystalline phase during the sintering process at 500 °C. Furthermore, all the materials studied showed high catalytic activity under UV irradiation. In particular, the nickel-doped thermally treated materials also exhibited good catalytic performance under visible light, even better than the amorphous phases obtained under UV irradiation.

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Highlights

  • In this study, TiO2 was synthesized and doped with 5 and 10% w/w Ni by sol-gel process.

  • The samples were characterized by XRD, SEM, XPS, UV-Vis, RAMAN, DRS, and DSC techniques.

  • The analysis showed that all the studied materials exhibited high catalytic activity under UV irradiation.

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Acknowledgements

DH-G has a grant from CONACYT to obtain a scholarship PhD, CVU 744829. This research was partially supported by the Scientific Research Coordination of the Universidad Michoacana de San Nicolás de Hidalgo and CINVESTAV-Unidad Mérida. The authors also thank the LANNBIO CINVESTAV -Mérida for allowing us to use their facilities.

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Authors and Affiliations

  1. Student of Programa Institucional de Doctorado en Ciencias Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Santiago Tapia 403, col. Centro, Morelia, Mich, cp 58000, México

    D. Herrera Garcia

  2. Facultad de Ingeniería Civil, Universidad Michoacana de San Nicolás de Hidalgo, Santiago Tapia 403, col. Centro, Morelia, Mich, C.P 58000, México

    M. G. Garnica-Romo

  3. Investigador Posdoctoral por México, Departamento de Física Aplicada, Cinvestav-Unidad Mérida, Carretera Antigua a Progreso Km. 6, Mérida Yucatán, 97217, México

    A. Ramos-Corona

  4. Investigador Posdoctoral por México, Facultad de Ingeniería, Universidad Autónoma de Yucatán, Avenida Industrias no contaminantes por anillo periférico norte s/n AP 150, Cordemex, Mérida, Yucatán, México

    F. Cervantes-Alvarez

  5. Centro de Investigación en Micro y Nanotecnología, Universidad Veracruzana, Adolfo Ruiz Cortines No. 455, CP 94294, Fracc. Costa Verde, Boca del Río, Veracruz, México

    L. García-González

  6. Facultad de Físico‑Matemáticas, Universidad Michoacana de San Nicolás de Hidalgo, Santiago Tapia 403, Col. Centro, Morelia, Mich, C.P 58000, México

    N. Dasgupta-Schubert

  7. Applied Physics Department, Cinvestav-Unidad Mérida, Carretera Antigua a Progreso Km. 6, Mérida Yucatán, 97217, México

    J. J. Alvarado-Gil

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  1. D. Herrera Garcia
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  2. M. G. Garnica-Romo
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  4. F. Cervantes-Alvarez
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  5. L. García-González
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  7. J. J. Alvarado-Gil
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Contributions

David Herrera-Garcia conducted the experiments. M.G. Garnica-Romo contributed to the analyses, the discussion of the results, and the preparation of the manuscript. A. Ramos-Corona, F. Cervantes-Alvarez, L. García -González, N. Dasgupta-Schubert, J.J. Alvarado-Gil contributed to the analyses, the discussion of the results.

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Correspondence to M. G. Garnica-Romo.

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Herrera Garcia, D., Garnica-Romo, M.G., Ramos-Corona, A. et al. Photocatalytic activity under visible light of Ni:TiO2-NiTiO3 synthesized through a modified sol-gel method. J Sol-Gel Sci Technol (2024). https://doi.org/10.1007/s10971-024-06411-y

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