Please use this identifier to cite or link to this item:
http://hdl.handle.net/2445/145204
Title: | Bioinspired ZnO-based solar photocatalysts for the efficient decontamination of persistent organic pollutants and hexavalent chromium in wastewater |
Author: | Serrà i Ramos, Albert Gómez, Elvira Philippe, Laetitia |
Keywords: | Fotocatàlisi Òxid de zinc Photocatalysis Zinc oxide |
Issue Date: | 20-Nov-2019 |
Publisher: | MDPI |
Abstract: | Biomimetic/bioinspired engineering and sulfidation processes are effective strategies for improving the visible light-driven photocatalytic performance of ZnO photocatalysts. A facile electrodeposition process in high oxygen-flux conditions was used to synthesize well-defined fractal micro/nanoferns, consequently increasing the photocatalyst's light-trapping capability and accessible active surface. Next, a simple sulfidation process was used to form a thin layer of ZnS, producing ZnO@ZnS core@shell micro/nanoferns and thereby tuning the optoelectronic properties and extending the photoresponse to the visible region. The ZnO@ZnS micro/nanoferns exhibited clear superiority over other ZnO photocatalyts in the photooxidation of persistent organic pollutants (POPs) and the photoreduction of Cr(VI). Their excellent photocatalytic performance allowed the photodegradation under UV-filtered sunlight of nearly 97% of methylene blue after 60 min; the mineralization of >98% of a mixture of methylene blue, 4-nitrophenol, and rhodamine-B after 210 min; and the removal of nearly 65% of Cr(VI) after 180 min. In addition, the ZnO@ZnS micro/nanoferns demonstrated good ability to decontaminate an inorganic-organic bipollutant system, with promising potential to leverage synergistic effects. Finally, these micro/nanoferns presented great recyclability and reusability for both photooxidation and photoremediation processes. These findings support that sulfidation and biomimetic engineering can be a superior route for designing efficient sunlight-driven ZnO-photocatalysts for water decontamination. |
Note: | Reproducció del document publicat a: https://doi.org/10.3390/catal9120974 |
It is part of: | Catalysts, 2019, vol. 9, p. 974 |
URI: | http://hdl.handle.net/2445/145204 |
Related resource: | https://doi.org/10.3390/catal9120974 |
ISSN: | 2073-4344 |
Appears in Collections: | Articles publicats en revistes (Ciència dels Materials i Química Física) |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
693127.pdf | 2.97 MB | Adobe PDF | View/Open |
This item is licensed under a Creative Commons License