Journal
MATERIALS LETTERS
Volume 333, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.matlet.2022.133564
Keywords
Nanoparticles; Piezoelectric materials; Cr6+ reduction; Piezo-photocatalysis; MoS2 nanoflower
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A strategy for highly efficient reduction of Cr6+ by utilizing the photocatalysis and piezoelectric effect of MoS2 nanoflowers is proposed. The Cr6+ removal rate catalyzed by few-layer MoS2 nanoflowers increases with increasing ultrasonication power under solar irradiation. The synergistic effect of light induced reduction effect and ultrasound induced piezoelectric field contributes to the fast Cr6+ removal rate.
The reduction of Cr6+ is very important for sewage treatment. Here, a strategy is proposed for the highly efficient reduction of Cr6+ by co-utilizing the photocatalysis and piezoelectric effect of MoS2 nanoflowers. Under both solar-irradiation (300 W Xe lamp) and ultrasonication, the Cr6+ removal rate catalyzed by few-layer MoS2 nanoflowers (10 mg) increases with increasing ultrasonication power, and a maximum of 96.22 % is achieved under solar irradiation and ultrasonication (100 W) for 20 min, similar to 3.65-fold of that under only solar irradiation. The fast Cr6+ removal rate can be ascribed to the synergistic effect of light induced reduction effect and ultrasound induced piezoelectric field. This work explores a new approach for highly efficient Cr6+ removal.
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