Synthesis graphene quantum dots/TiO2 nanocomposite for Rhodamine degradation

Pham Minh Thuy; Vu Duc Chinh; Chu Thi Thu Hien

doi:10.62239/jca.2024.048

Authors

Pham Minh Thuy Institute of Chemistry, Vietnam Academy of Science and Technology | Hanoi University of Civil Engineering Author
Vu Duc Chinh Institute of Materials Science, Vietnam Academy of Science and Technology Author
Chu Thi Thu Hien Hanoi University of Civil Engineering Author

DOI:

https://doi.org/10.62239/jca.2024.048

Keywords:

Rhodamine B degradation, GQDs photocatalyst, TiO2 photocatalyst

Abstract

The photocatalytic activity of Graphene quantum dots (GQDs)/TiO₂ was investigated for the degradation of rhodamine B under UV irradiation. The GQDs/TiO₂ was synthesized via chemical method. The synthesized materials have been characterized by photoluminescence (PL), X-ray diffraction (XRD), scanning electron microscopy (SEM) and high-resolution transmission electron microscopy (HR–TEM). Under the dark condition GQDs/TiO₂ can remove 47,7% RhB. Besides, under the UV light, the removal efficiency of rhodamine B was 99.2%, with thin 50 min. However, the removal efficiency of rhodamine B by using TiO₂ was 91.5%, which was lower than that of GQDs/TiO₂. Overall, this work provides a novel strategy for the green synthesis of GQDs/TiO₂, and its promising application prospect in environmental remediation.

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