Auto-combustion designed BiFeO3/Bi2O3 photocatalyst for improved photodegradation of nitrobenzene under visible light and sunlight irradiation
[EN] Herein, using the auto-combustion method, a BiFeO/BiO composite was successfully synthesized for the photocatalytic degradation of nitrobenzene under visible illumination. The compound was subsequently characterized using varied characterization approaches, including XRD, SEM/EDS, FTIR, XPS, an...
| Autores: | , , , , , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión aceptada para publicación |
| Fecha de publicación: | 2024 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/347522 |
| Acceso en línea: | http://hdl.handle.net/10261/347522 |
| Access Level: | acceso abierto |
| Palabra clave: | BiFeO3/Bi2O3 Auto-combustion Photocatalysis Nitrobenzene Visible light driven |
| Sumario: | [EN] Herein, using the auto-combustion method, a BiFeO/BiO composite was successfully synthesized for the photocatalytic degradation of nitrobenzene under visible illumination. The compound was subsequently characterized using varied characterization approaches, including XRD, SEM/EDS, FTIR, XPS, and UV–VIS techniques. The photocatalytic capability of the resulting sample was assessed by removing nitrobenzene (NB) under solar and artificial (15 W LED lamp) exposure. Within 180 and 240 min of exposure, the prepared BiFeO/BiO composite exhibited impressive photocatalytic ability with quasi-total elimination (100%) of NB under both solar and LED lights, in contrast to pure oxides. The photocatalytic capability of BiFeO/BiO was 2.88 and 1.67 folds higher than those of BiFeO and BiO. This was linked to the effective charge splitting occurring at the BiFeO/BiO interface and the lower recombination ratio of charge carriers. Additionally, BiFeO/BiO exhibited outstanding sustainability without loss of activity during the first 5 cycles. Aside from this, quenching investigation showed that OH was responsible for the degradation process. Furthermore, total organic carbon (TOC) analysis confirmed NB mineralization. Based on these previous findings, an appropriate mechanism for NB decomposition was established. Overall, the BiFeO/BiO photocatalyst is recommended for use in the efficient photocatalytic removal of organic contaminants owing to its straightforward manufacturing approach, high levels of degradation, and strong structure for potential uses. |
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