Abstract

Cerium dioxide quantum dots (CeO2QDs) modified graphitic carbon nitride (g-C3N4) was fabricated by a facile chemical reaction with urea and cerium nitrate hexahydrate as precursors. Combined X-ray diffraction (XRD), UV–Vis DRS, transmission electron microscopy (TEM), photoluminescence spectroscopy (PL), Electrochemical impedance spectra (EIS), Thermogravimetric analysis (TGA), Brunner-Emmet-Teller (BET) measurements and X-ray photoelectron spectroscopy (XPS) studies showing that CeO2QDs dispersed homogeneously on the g-C3N4 surface, which enhanced the absorption in visible light region. Specifically, we found that CeO2QDs/g-C3N4 shows much lower electron-hole recombination rate, and its Rhodamine B photodegradation rate constant can reach 0.00985 min−1, which is 7 times higher than that of single g-C3N4. In addition, the CeO2QDs/g-C3N4 displayed outstanding catalytic stability. Furthermore, the CeO2QDs/g-C3N4 catalyst also exhibited the excellent photodegradation performance on other substrates such as TC, Methyl Orange, and Methyl Blue. It was proposed that the CeO2QDs/g-C3N4 photocatalyst could follow a more appropriate Z-scheme charge transfer mechanism. Our studies extend the application of Quantum dots nanocomposite catalyst and pave the way for its further rational design.

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.