Chen, Y.; Hong, C.; Xu, Q.; Zheng, H.; Wang, C.; Lu, H.; Zhang, S.; Du, M.; Zeng, G. Visible Light Up-conversion of Bio-Carbon Quantum-Dot-Decorated TiO2 for Naphthalene Removal. Preprints2024, 2024041092. https://doi.org/10.20944/preprints202404.1092.v1
APA Style
Chen, Y., Hong, C., Xu, Q., Zheng, H., Wang, C., Lu, H., Zhang, S., Du, M., & Zeng, G. (2024). Visible Light Up-conversion of Bio-Carbon Quantum-Dot-Decorated TiO2 for Naphthalene Removal. Preprints. https://doi.org/10.20944/preprints202404.1092.v1
Chicago/Turabian Style
Chen, Y., Mingming Du and Ganning Zeng. 2024 "Visible Light Up-conversion of Bio-Carbon Quantum-Dot-Decorated TiO2 for Naphthalene Removal" Preprints. https://doi.org/10.20944/preprints202404.1092.v1
Abstract
In this study, carbon-quantum-dot (CQD)-decorated TiO2 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 oC, respectively. The CQD/TiO2 composite remarkably enhanced the photocatalytic activity. The degradation of naphthalene under a visible light environment indicated that there is a synergistic mechanism between CQDs and TiO2, 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 photo-catalytic behavior of the CQD/TiO2 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 TiO2 photocatalyst for up-conversion, along with critical insights into the development of harmful macroalgae resources.
Copyright:
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