Photodegradation of Rhodamine B catalyzed by ZnO pellets
Abstract This paper describes the development of ZnO semiconductors applied as photocatalysts for the degradation of water contaminants, with the shape of ceramic pellets thick enough to maintain their structures, prepared by slip casting and sintering. The samples presented porosities around 40% an...
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| Format: | Article |
| Language: | English |
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Associação Brasileira de Cerâmica
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| Series: | Cerâmica |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0366-69132019000500047&lng=en&tlng=en |
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| author | T. M. O. Ruellas G. H. S. Domingos L. O. O. Peçanha S. C. Maestrelli T. R. Giraldi |
| author_facet | T. M. O. Ruellas G. H. S. Domingos L. O. O. Peçanha S. C. Maestrelli T. R. Giraldi |
| author_sort | T. M. O. Ruellas |
| collection | DOAJ |
| description | Abstract This paper describes the development of ZnO semiconductors applied as photocatalysts for the degradation of water contaminants, with the shape of ceramic pellets thick enough to maintain their structures, prepared by slip casting and sintering. The samples presented porosities around 40% and densities around 3.4 g/cm3, which represented about 61% of the theoretical density of ZnO. After obtaining the ceramic samples, the degradation of Rhodamine B dye by photocatalysis was evaluated in six cycles of degradation. After the cycles, changes in the surface of the samples were verified, possibly due to leaching during photocatalysis since they presented mean grain sizes of 0.61 μm before and 0.36 μm after the photocatalysis. The ceramic ZnO samples were able to satisfactorily degrade Rhodamine B for several cycles, resulting in successful reuse of photocatalysts and increased facility of removing the photocatalysts from the medium after degradation compared to powders in suspensions. |
| first_indexed | 2024-12-12T06:28:23Z |
| format | Article |
| id | doaj.art-f35350fd2f0f45879f7eb59a85382e7c |
| institution | Directory Open Access Journal |
| issn | 1678-4553 |
| language | English |
| last_indexed | 2024-12-12T06:28:23Z |
| publisher | Associação Brasileira de Cerâmica |
| record_format | Article |
| series | Cerâmica |
| spelling | doaj.art-f35350fd2f0f45879f7eb59a85382e7c2022-12-22T00:34:42ZengAssociação Brasileira de CerâmicaCerâmica1678-455365suppl 1475310.1590/0366-6913201965s12609S0366-69132019000500047Photodegradation of Rhodamine B catalyzed by ZnO pelletsT. M. O. RuellasG. H. S. DomingosL. O. O. PeçanhaS. C. MaestrelliT. R. GiraldiAbstract This paper describes the development of ZnO semiconductors applied as photocatalysts for the degradation of water contaminants, with the shape of ceramic pellets thick enough to maintain their structures, prepared by slip casting and sintering. The samples presented porosities around 40% and densities around 3.4 g/cm3, which represented about 61% of the theoretical density of ZnO. After obtaining the ceramic samples, the degradation of Rhodamine B dye by photocatalysis was evaluated in six cycles of degradation. After the cycles, changes in the surface of the samples were verified, possibly due to leaching during photocatalysis since they presented mean grain sizes of 0.61 μm before and 0.36 μm after the photocatalysis. The ceramic ZnO samples were able to satisfactorily degrade Rhodamine B for several cycles, resulting in successful reuse of photocatalysts and increased facility of removing the photocatalysts from the medium after degradation compared to powders in suspensions.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0366-69132019000500047&lng=en&tlng=enslip castingsemiconductorsphotocatalysisRhodamine BZnO |
| spellingShingle | T. M. O. Ruellas G. H. S. Domingos L. O. O. Peçanha S. C. Maestrelli T. R. Giraldi Photodegradation of Rhodamine B catalyzed by ZnO pellets Cerâmica slip casting semiconductors photocatalysis Rhodamine B ZnO |
| title | Photodegradation of Rhodamine B catalyzed by ZnO pellets |
| title_full | Photodegradation of Rhodamine B catalyzed by ZnO pellets |
| title_fullStr | Photodegradation of Rhodamine B catalyzed by ZnO pellets |
| title_full_unstemmed | Photodegradation of Rhodamine B catalyzed by ZnO pellets |
| title_short | Photodegradation of Rhodamine B catalyzed by ZnO pellets |
| title_sort | photodegradation of rhodamine b catalyzed by zno pellets |
| topic | slip casting semiconductors photocatalysis Rhodamine B ZnO |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0366-69132019000500047&lng=en&tlng=en |
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