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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Bibliographic Details
Published inMolecules (Basel, Switzerland) Vol. 29; no. 11
Main Authors Chen, Yunteng, Hong, Chunxian, Xu, Qiang, Zheng, Haihong, Wang, Chao, Lu, Hongshun, Zhang, Shuai, Du, Mingming, Zeng, Ganning
Format Journal Article
LanguageEnglish
Published Switzerland 06.06.2024
Subjects
photodegradation
naphthalene
carbon quantum dots
TiO2
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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.
ISSN:1420-3049