Efficient photodegradation of 4-chlorophenol under solar radiation using a new ZnO/ZnS/carbon xerogel composite as a photocatalyst
| Autor: | Liana Alvares Rodrigues, Marcelo Yuji de Moura Yamanaka, Nicolas Perciani de Moraes, Rebeca Bacani, Lucca Gabriel Penida Marins, Robson S. Rocha |
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| Rok vydání: | 2021 |
| Předmět: |
General Chemical Engineering
Composite number General Physics and Astronomy chemistry.chemical_element 02 engineering and technology General Chemistry Zinc Chronoamperometry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Zinc sulfide 0104 chemical sciences chemistry.chemical_compound chemistry Chemical engineering Specific surface area Photocatalysis 0210 nano-technology Photodegradation Carbon |
| Zdroj: | Journal of Photochemistry and Photobiology A: Chemistry. 418:113377 |
| ISSN: | 1010-6030 |
| Popis: | This paper explored the development of a new zinc oxide/zinc sulfide/carbon xerogel composite photocatalyst aiming at the efficient 4-chlorophenol photodegradation under solar light. X-ray diffractometry highlights that the crystalline structure of zinc sulfide depended on the presence of zinc oxide, changing from face-centered cubic in the pure ZnS to hexagonal (2 H) in the composite. Furthermore, the addition of carbon xerogel to the composite led to a reduction in the particle size and an increase in the specific surface area. Photocatalytic results show that the ternary composite (XC/ZnO-ZnS) displayed the best photocatalytic response for 4-chlorophenol degradation among the tested materials. Such photocatalytic improvement is probably related to the formation of heterojunctions between the semiconductors and the carbonaceous phase, as well as the enhanced morphological properties of the composite. The superiority of the XC/ZnO-ZnS was further corroborated in the chronoamperometry tests, as it presented the highest photocurrent generation. |
| Databáze: | OpenAIRE |
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