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Título: Enhancing the efciency of magnetically driven carbon nitride–based nanocomposites with magnetic nanofowers for the removal of methylene blue dye at neutral pH
Autor(es): Rodovalho, Fernanda Lopes
Rosa, Eliane Vieira
Silva, Atailson Oliveira da
Moya, Sergio Enrique
Campos, Alex Fabiano Cortez
Sousa, Marcelo Henrique
ORCID: https://orcid.org/0000-0002-2144-0959
https://orcid.org/0000-0001-7434-6491
https://orcid.org/0000-0002-7174-1960
https://orcid.org/0000-0002-7918-8522
https://orcid.org/0000-0003-1210-8329
Afiliação do autor: University of Brasilia, Green Nanotechnology Group
University of Brasilia, Faculty of Ceilandia, Postgraduate Program in Health Sciences and Technologies
University of Brasilia, Green Nanotechnology Group
Federal Institute of Education, Science and Technology Goiano
University of Brasilia, Green Nanotechnology Group
Soft Matter Nanotechnology Laboratory, CIC biomaGUNE, San Sebastian
University of Brasilia, Faculty UnB – Planaltina, Laboratory for Environmental and Applied Nanoscience
University of Brasilia, Institute of Physics, International Center of Physics
Assunto: Nitreto de carbono
Óxido de ferro
Nanopartículas magnéticas
Data de publicação: 25-Jan-2024
Editora: Springer
Referência: RODOVALHO, Fernanda Lopes et al. Enhancing the efciency of magnetically driven carbon nitride–based nanocomposites with magnetic nanofowers for the removal of methylene blue dye at neutral pH. Environmental Science and Pollution Research, [S. l.], v. 31, p. 53706–53717, 2024. DOI: https://doi.org/10.1007/s11356-024-32131-5.
Abstract: The present study focuses on the elaboration of magnetic nanocomposites by the in situ incorporation of magnetite (Fe3O4) nanoparticles (NPs) with spherical and nanofower-like morphologies in graphitic carbon nitride (g-C3N4) sheets using two diferent synthetic routes. Nanomaterials are characterized by TEM, SEM, XRD, FTIR, BET, zetametry, vibrating sample magnetometry, and UV–vis absorption spectroscopy. The decoration of the carbon nitride matrix with the magnetic NPs enhanced optical and textural properties. The infuence of the morphology of the magnetic NPs on the adsorptive and photocatalytic properties of the nanocomposites under diferent pH conditions (4.5, 6.9, and 10.6) was assessed from batch tests to remove methylene blue (MB) from aqueous solutions. In extreme pH conditions, the nanocomposites exhibited lower or equivalent MB removal capacity compared to the pure g-C3N4. However, at neutral medium, the nanocomposite with incorporated Fe3O4 nanofowers showed a signifcantly higher removal efciency (80.7%) due to the combination of a high adsorption capacity and a good photocatalytic activity in this pH region. The proposed nanocomposite is a promising alternative to remove cationic dyes from water by magnetic assistance, since no pH adjustment of the polluted efuent is required, reducing costs and environmental impact in the dyeing industry.
Unidade Acadêmica: Faculdade UnB Ceilândia (FCE)
Faculdade UnB Planaltina (FUP)
Instituto de Física (IF)
Programa de pós-graduação: Programa de Pós-Graduação em Ciências e Tecnologias em Saúde
DOI: https://doi.org/10.1007/s11356-024-32131-5
Versão da editora: https://link.springer.com/article/10.1007/s11356-024-32131-5
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