Biomolecule-assisted route to obtain nanostructured bismuth oxybromide with enhanced photocatalytic activity
Using a microwave-assisted hydrothermal method, we synthesized BiOBr powders, with and without, glycine or phenylalanine as templates. The samples were characterized by X-ray Diffraction, UV–Vis Diffuse Reflectance Spectroscopy, and Field Emission Gun Scanning Electron Microscopy. The XRD patterns w...
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2021-01-01
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doaj-0a95364c199f489db91463abc9876bd02021-02-01T04:12:06ZengElsevierBoletín de la Sociedad Española de Cerámica y Vidrio0366-31752021-01-01601212Biomolecule-assisted route to obtain nanostructured bismuth oxybromide with enhanced photocatalytic activityGenesis de O. Lima0Thaylan P. Araújo1José Renato de O. Lima2Gilza Maria P. Prazeres3Carlos William A. Paschoal4Elson Longo5Auro A. Tanaka6Adeilton P. Maciel7Diego A.B. Barbosa8Marcio Aurélio P. Almeida9Departamento de Química, Universidade Federal do Maranhão, Campus do Bacanga, 65080-805 São Luís, MA, BrazilDepartamento de Química, Universidade Federal do Maranhão, Campus do Bacanga, 65080-805 São Luís, MA, BrazilCoordenação de Ciência de Tecnologia, Universidade Federal do Maranhão, Campus do Bacanga, 65080-805 São Luís, MA, BrazilDepartamento de Química, Universidade Federal do Maranhão, Campus do Bacanga, 65080-805 São Luís, MA, BrazilDepartamento de Física, Universidade Federal do Ceará, Campus do Pici, 65455-900 Fortaleza, CE, BrazilDepartamento de Química, Universidade Federal de São Carlos, 13565-905 São Carlos, SP, BrazilDepartamento de Química, Universidade Federal do Maranhão, Campus do Bacanga, 65080-805 São Luís, MA, BrazilDepartamento de Química, Universidade Federal do Maranhão, Campus do Bacanga, 65080-805 São Luís, MA, BrazilCoordenação de Licenciatura em Ciências Naturais, Universidade Federal do Maranhão, Campus Bacabal, 65418-000 Bacabal, MA, BrazilCoordenação de Ciência de Tecnologia, Universidade Federal do Maranhão, Campus do Bacanga, 65080-805 São Luís, MA, Brazil; Corresponding author.Using a microwave-assisted hydrothermal method, we synthesized BiOBr powders, with and without, glycine or phenylalanine as templates. The samples were characterized by X-ray Diffraction, UV–Vis Diffuse Reflectance Spectroscopy, and Field Emission Gun Scanning Electron Microscopy. The XRD patterns were indexed to the tetragonal structure and presented very different intensities from each other, which is consistent with changes in the structural organization. The FEG-SEM images showed morphology alterations, from nanoplates for unmodified BiOBr to nanolamellae for BiOBr with phenylalanine (BOB-phe). The catalytic activity of BOB-phe degraded 98% of Rhodamine B dye in approximately 20 min, while the other BiOBr compounds presented slower degradation kinetics, which could be explained by a higher amount of active sites on BOB-phe surface. Resumen: Utilizando un método hidrotermal asistido por microondas, sintetizamos los polvos de BiOBr, con y sin, glicina o fenilalanina como plantillas. Las muestras se caracterizaron por difracción de rayos X, espectroscopía de reflectancia difusa UV-Vis y microscopía electrónica de barrido con pistola de emisión de campo. Los patrones XRD se indexaron a la estructura tetragonal y presentaron intensidades muy diferentes entre sí, lo que es consistente con los cambios en la organización estructural. Las imágenes de FEG-SEM mostraron alteraciones de la morfología, desde nanoplacas para BiOBr no modificado hasta nanolamelas para BiOBr con fenilalanina (BOB-phe). La actividad catalítica de BOB-phe degradó el 98% del colorante de rodamina B en aproximadamente 20 minutos, mientras que los otros compuestos de BiOBr presentaron una cinética de degradación más lenta, lo que podría explicarse por una mayor cantidad de sitios activos en la superficie de BOB-phe.http://www.sciencedirect.com/science/article/pii/S0366317520300017Oxihaluro de bismutoFotocatálisisAminoácidos |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Genesis de O. Lima Thaylan P. Araújo José Renato de O. Lima Gilza Maria P. Prazeres Carlos William A. Paschoal Elson Longo Auro A. Tanaka Adeilton P. Maciel Diego A.B. Barbosa Marcio Aurélio P. Almeida |
spellingShingle |
Genesis de O. Lima Thaylan P. Araújo José Renato de O. Lima Gilza Maria P. Prazeres Carlos William A. Paschoal Elson Longo Auro A. Tanaka Adeilton P. Maciel Diego A.B. Barbosa Marcio Aurélio P. Almeida Biomolecule-assisted route to obtain nanostructured bismuth oxybromide with enhanced photocatalytic activity Boletín de la Sociedad Española de Cerámica y Vidrio Oxihaluro de bismuto Fotocatálisis Aminoácidos |
author_facet |
Genesis de O. Lima Thaylan P. Araújo José Renato de O. Lima Gilza Maria P. Prazeres Carlos William A. Paschoal Elson Longo Auro A. Tanaka Adeilton P. Maciel Diego A.B. Barbosa Marcio Aurélio P. Almeida |
author_sort |
Genesis de O. Lima |
title |
Biomolecule-assisted route to obtain nanostructured bismuth oxybromide with enhanced photocatalytic activity |
title_short |
Biomolecule-assisted route to obtain nanostructured bismuth oxybromide with enhanced photocatalytic activity |
title_full |
Biomolecule-assisted route to obtain nanostructured bismuth oxybromide with enhanced photocatalytic activity |
title_fullStr |
Biomolecule-assisted route to obtain nanostructured bismuth oxybromide with enhanced photocatalytic activity |
title_full_unstemmed |
Biomolecule-assisted route to obtain nanostructured bismuth oxybromide with enhanced photocatalytic activity |
title_sort |
biomolecule-assisted route to obtain nanostructured bismuth oxybromide with enhanced photocatalytic activity |
publisher |
Elsevier |
series |
Boletín de la Sociedad Española de Cerámica y Vidrio |
issn |
0366-3175 |
publishDate |
2021-01-01 |
description |
Using a microwave-assisted hydrothermal method, we synthesized BiOBr powders, with and without, glycine or phenylalanine as templates. The samples were characterized by X-ray Diffraction, UV–Vis Diffuse Reflectance Spectroscopy, and Field Emission Gun Scanning Electron Microscopy. The XRD patterns were indexed to the tetragonal structure and presented very different intensities from each other, which is consistent with changes in the structural organization. The FEG-SEM images showed morphology alterations, from nanoplates for unmodified BiOBr to nanolamellae for BiOBr with phenylalanine (BOB-phe). The catalytic activity of BOB-phe degraded 98% of Rhodamine B dye in approximately 20 min, while the other BiOBr compounds presented slower degradation kinetics, which could be explained by a higher amount of active sites on BOB-phe surface. Resumen: Utilizando un método hidrotermal asistido por microondas, sintetizamos los polvos de BiOBr, con y sin, glicina o fenilalanina como plantillas. Las muestras se caracterizaron por difracción de rayos X, espectroscopía de reflectancia difusa UV-Vis y microscopía electrónica de barrido con pistola de emisión de campo. Los patrones XRD se indexaron a la estructura tetragonal y presentaron intensidades muy diferentes entre sí, lo que es consistente con los cambios en la organización estructural. Las imágenes de FEG-SEM mostraron alteraciones de la morfología, desde nanoplacas para BiOBr no modificado hasta nanolamelas para BiOBr con fenilalanina (BOB-phe). La actividad catalítica de BOB-phe degradó el 98% del colorante de rodamina B en aproximadamente 20 minutos, mientras que los otros compuestos de BiOBr presentaron una cinética de degradación más lenta, lo que podría explicarse por una mayor cantidad de sitios activos en la superficie de BOB-phe. |
topic |
Oxihaluro de bismuto Fotocatálisis Aminoácidos |
url |
http://www.sciencedirect.com/science/article/pii/S0366317520300017 |
work_keys_str_mv |
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