Visible Light Enhancement of Biocarbon Quantum-Dot-Decorated TiO 2 for Naphthalene Removal
In this study, carbon-quantum-dot (CQD)-decorated TiO was prepared using an ultrasonic doping method and applied in the photocatalytic degradation of naphthalene under sunlight irradiation. The CQDs were synthesized from a typical macroalgae via diluted sulfuric acid pretreatment and hydrothermal sy...
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Published in | Molecules (Basel, Switzerland) Vol. 29; no. 11 |
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Main Authors | , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Switzerland
06.06.2024
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Subjects | |
Online Access | Get full text |
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Summary: | In this study, carbon-quantum-dot (CQD)-decorated TiO
was prepared using an ultrasonic doping method and applied in the photocatalytic degradation of naphthalene under sunlight irradiation. The CQDs were synthesized from a typical macroalgae via diluted sulfuric acid pretreatment and hydrothermal synthesis using an optimal design, i.e., 3 wt% and 200 °C, respectively. The CQD/TiO
composite remarkably enhanced the photocatalytic activity. The degradation of naphthalene under a visible light environment indicated that there is a synergistic mechanism between the CQDs and TiO
, in which the generation of reactive oxygen species is significantly triggered; in addition, the N that originated from the macroalgae accelerated the photocatalytic efficiency. Kinetic analysis showed that the photocatalytic behavior of the CQD/TiO
composite followed a pseudo-first-order equation. Consequently, our combined experimental approach not only provides a facile pretreatment process for bio-CQDs synthesis, but also delivers a suitable TiO
photocatalyst for the visible environment along with critical insights into the development of harmful macroalgae resources. |
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ISSN: | 1420-3049 |