Formic acid and hydrogen generation from the photocatalytic reduction of CO2 on visible light activated N-TiO2/CeO2/CuO composites
Ternary of titania-based composites were prepared in two steps. First, pure and nitrogen-doped titanium dioxide powders were obtained using Pechini´s method. Then, these powders were impregnated with 3% wt. of cerium and copper oxide particles. The X-ray diffraction characterization shows the presen...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-09-01
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| Series: | Journal of Photochemistry and Photobiology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666469022000185 |
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| author | Luz I. Ibarra-Rodriguez Juan C. Pantoja-Espinoza Edith Luévano-Hipólito Luis F. Garay-Rodríguez Alejandro López-Ortiz Leticia M. Torres-Martínez Virginia H. Collins-Martínez |
| author_facet | Luz I. Ibarra-Rodriguez Juan C. Pantoja-Espinoza Edith Luévano-Hipólito Luis F. Garay-Rodríguez Alejandro López-Ortiz Leticia M. Torres-Martínez Virginia H. Collins-Martínez |
| author_sort | Luz I. Ibarra-Rodriguez |
| collection | DOAJ |
| description | Ternary of titania-based composites were prepared in two steps. First, pure and nitrogen-doped titanium dioxide powders were obtained using Pechini´s method. Then, these powders were impregnated with 3% wt. of cerium and copper oxide particles. The X-ray diffraction characterization shows the presence of rutile and anatase phases. The morphological characterizations exhibited some CuO agglomeration that resulted in a limited dispersion. Nitrogen-doped composite materials present better surface area due to the synergy effect of the urea precursor employed in their synthesis. UV–Vis analysis shows a redshift displacement for double and triple composites related to enhancing light absorption. XPS characterization made it possible to identify a mixed-valence state of Ti associated with the presence of oxygen vacancies, which presumable are responsible for the increase of adsorption of interest molecules. N-TiO2/CuO presents the highest formic acid production (33 µmol g−1 min-1) attributed to a better capacity to adsorb CO2 molecules and the formation of a Z-scheme where charges are spatially separated. The addition of CeO2 co-catalyst decreases formic acid performance due to its inherent ability to adsorb CO3−2 and OH ions that could hinder available active sites. On the other hand, in the case of hydrogen production, N-TiO2/CeO2/CuO material exhibited the highest production due to its highest Ti3+/Ti4+ valence state ratio, which presumably increases available active sites for molecular water adsorption and consequently for transformation into H2. |
| first_indexed | 2024-04-11T22:28:36Z |
| format | Article |
| id | doaj.art-980c5b62506c4725a6d6763f36863b99 |
| institution | Directory Open Access Journal |
| issn | 2666-4690 |
| language | English |
| last_indexed | 2024-04-11T22:28:36Z |
| publishDate | 2022-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Photochemistry and Photobiology |
| spelling | doaj.art-980c5b62506c4725a6d6763f36863b992022-12-22T03:59:34ZengElsevierJournal of Photochemistry and Photobiology2666-46902022-09-0111100125Formic acid and hydrogen generation from the photocatalytic reduction of CO2 on visible light activated N-TiO2/CeO2/CuO compositesLuz I. Ibarra-Rodriguez0Juan C. Pantoja-Espinoza1Edith Luévano-Hipólito2Luis F. Garay-Rodríguez3Alejandro López-Ortiz4Leticia M. Torres-Martínez5Virginia H. Collins-Martínez6Centro de Investigación en Materiales Avanzados (CIMAV), S.C. Alianza Norte #202, Parque de Investigación e Innovación Tecnológica, Apodaca, Nuevo León, C.P. 66600, MexicoCentro de Investigación en Materiales Avanzados (CIMAV), S.C. Miguel de Cervantes #120, Complejo Industrial Chihuahua, Chihuahua, Chih., 31136 MexicoCONACYT - Universidad Autónoma de Nuevo León, Facultad de Ingeniería Civil, Departamento de Ecomateriales y Energía, Av. Universidad S/N Ciudad Universitaria, San Nicolás de los Garza, Nuevo León, C.P. 66455, MexicoUniversidad Autónoma de Nuevo León, Facultad de Ingeniería Civil, Departamento de Ecomateriales y Energía, Av. Universidad S/N Ciudad Universitaria, San Nicolás de los Garza, Nuevo León, C.P. 66455, MexicoCentro de Investigación en Materiales Avanzados (CIMAV), S.C. Miguel de Cervantes #120, Complejo Industrial Chihuahua, Chihuahua, Chih., 31136 MexicoCentro de Investigación en Materiales Avanzados (CIMAV), S.C. Alianza Norte #202, Parque de Investigación e Innovación Tecnológica, Apodaca, Nuevo León, C.P. 66600, Mexico; Universidad Autónoma de Nuevo León, Facultad de Ingeniería Civil, Departamento de Ecomateriales y Energía, Av. Universidad S/N Ciudad Universitaria, San Nicolás de los Garza, Nuevo León, C.P. 66455, MexicoCentro de Investigación en Materiales Avanzados (CIMAV), S.C. Miguel de Cervantes #120, Complejo Industrial Chihuahua, Chihuahua, Chih., 31136 Mexico; Corresponding author.Ternary of titania-based composites were prepared in two steps. First, pure and nitrogen-doped titanium dioxide powders were obtained using Pechini´s method. Then, these powders were impregnated with 3% wt. of cerium and copper oxide particles. The X-ray diffraction characterization shows the presence of rutile and anatase phases. The morphological characterizations exhibited some CuO agglomeration that resulted in a limited dispersion. Nitrogen-doped composite materials present better surface area due to the synergy effect of the urea precursor employed in their synthesis. UV–Vis analysis shows a redshift displacement for double and triple composites related to enhancing light absorption. XPS characterization made it possible to identify a mixed-valence state of Ti associated with the presence of oxygen vacancies, which presumable are responsible for the increase of adsorption of interest molecules. N-TiO2/CuO presents the highest formic acid production (33 µmol g−1 min-1) attributed to a better capacity to adsorb CO2 molecules and the formation of a Z-scheme where charges are spatially separated. The addition of CeO2 co-catalyst decreases formic acid performance due to its inherent ability to adsorb CO3−2 and OH ions that could hinder available active sites. On the other hand, in the case of hydrogen production, N-TiO2/CeO2/CuO material exhibited the highest production due to its highest Ti3+/Ti4+ valence state ratio, which presumably increases available active sites for molecular water adsorption and consequently for transformation into H2.http://www.sciencedirect.com/science/article/pii/S2666469022000185CO2 photoreductionTernary compositesH2 evolutionOxygen vacancies |
| spellingShingle | Luz I. Ibarra-Rodriguez Juan C. Pantoja-Espinoza Edith Luévano-Hipólito Luis F. Garay-Rodríguez Alejandro López-Ortiz Leticia M. Torres-Martínez Virginia H. Collins-Martínez Formic acid and hydrogen generation from the photocatalytic reduction of CO2 on visible light activated N-TiO2/CeO2/CuO composites Journal of Photochemistry and Photobiology CO2 photoreduction Ternary composites H2 evolution Oxygen vacancies |
| title | Formic acid and hydrogen generation from the photocatalytic reduction of CO2 on visible light activated N-TiO2/CeO2/CuO composites |
| title_full | Formic acid and hydrogen generation from the photocatalytic reduction of CO2 on visible light activated N-TiO2/CeO2/CuO composites |
| title_fullStr | Formic acid and hydrogen generation from the photocatalytic reduction of CO2 on visible light activated N-TiO2/CeO2/CuO composites |
| title_full_unstemmed | Formic acid and hydrogen generation from the photocatalytic reduction of CO2 on visible light activated N-TiO2/CeO2/CuO composites |
| title_short | Formic acid and hydrogen generation from the photocatalytic reduction of CO2 on visible light activated N-TiO2/CeO2/CuO composites |
| title_sort | formic acid and hydrogen generation from the photocatalytic reduction of co2 on visible light activated n tio2 ceo2 cuo composites |
| topic | CO2 photoreduction Ternary composites H2 evolution Oxygen vacancies |
| url | http://www.sciencedirect.com/science/article/pii/S2666469022000185 |
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