Abstract
In this study, we report the construction of a novel composite photocatalyst (BiVO4/rGH) composed of quantum dots (QDs) self-decorated BiVO4-nanoparticels (NPs) and reduced graphene hydrogel (rGH). The composite structures were prepared using an in-situ growth method. The BiVO4/rGH composite photocatalysts exhibited excellent photocatalytic efficiency for the degradation of tetracycline hydrochloride (TC[rad]HCl). The promoted photocatalytic activity of the BiVO4/rGH is attributed to the synergetic effects of the unique structure involving QDs self-decorated BiVO4 NPs and a 3D network structure of rGH, which resulted in higher number of photogenerated charge carriers, surplus active sites, and enhanced charge separation. In addition, trapping measurements showed that ·O2− and h+, as the main active species, play a crucial role in the degradation of TC[rad]HCl over the composite photocatalyst. This study facilitates the design and construction of high efficiency hybrid photocatalysts with multifunctional materials for the removal of water pollutants.
Original language | English |
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Article number | 130052 |
Journal | Chemosphere |
Volume | 275 |
DOIs | |
State | Published - Jul 2021 |
Keywords
- BiVO
- Photocatalysis
- Quantum dots self-decoration
- Reduced graphene hydrogel
- Tetracycline hydrochloride