Enhanced H2O2 Upcycling into Hydroxyl Radicals with GO/Ni:FeOOH-Coated Silicon Nanowire Photocatalysts for Wastewater Treatment.
Nano Lett
; 23(14): 6323-6329, 2023 Jul 26.
Article
em En
| MEDLINE
| ID: mdl-37459426
ABSTRACT
There remains continued interest in improving the advanced water oxidation process [e.g., ultraviolet (UV)/hydrogen peroxide (H2O2)] for more efficient and environmentally friendly wastewater treatment. Here, we report the design, fabrication, and performance of graphene oxide (GO, on top)/nickel-doped iron oxyhydroxide (NiFeOOH, shell)/silicon nanowires (SiNWs, core) as a new multifunctional photocatalyst for the degradation of common pollutants like polystyrene and methylene blue through enhancing the hydroxyl radical (â¢OH) production rate of the UV/H2O2 system. The photocatalyst combines the advantages of a large surface area and light absorption characteristics of SiNWs with heterogeneous photo-Fenton active NiFeOOH and photocatalytically active/charge separator GO. In addition, the built-in electric field of GO/NiFeOOH/SiNWs facilitates the charge separation of electrons to GO and holes to NiFeOOH, thus boosting the photocatalytic performance. Our photocatalyst increases the â¢OH yield by 5.7 times compared with that of a blank H2O2 solution sample and also extends the light absorption spectrum to include visible light irradiation.
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MEDLINE
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En
Ano de publicação:
2023
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Article