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Enhancing the photocatalytic activity of TiO2 and TiO2–SiO2 by coupling with graphene–gold nanocomposites by Vu Duc Chinh; Irene Bavasso; Luca Di Palma; Anna Candida Felici; Marco Scarsella; Giorgio Vilardi; Maria Paola Bracciale; Nguyen Thuy Van is a Materials Science article available to read on EtoBox.

What is Enhancing the photocatalytic activity of TiO2 and TiO2–SiO2 by coupling with graphene–gold nanocomposites about?

In the present paper, a novel composite Graphene-Gold (Gr-Au)/TiO 2 -SiO 2 photocatalyst was synthesized and tested for the removal of methylene blue and rhodamine B in water solutions. First, Gr-Au nanoparticle composite was synthesized by simultaneous reduction and deposition of Au nanoparticles on Gr surface. The photodegradation of methylene blue and rhodamine B in aqueous solutions was studied using various photocatalysts, including neat TiO 2 -SiO 2 , Gr/TiO 2 -SiO 2 and Gr-Au/TiO 2 -SiO 2 composites. The Gr weight ratio in this research is 2% in the Gr/TiO 2 -SiO 2 composites. Detailed characterization (field emission scanning electron microscope, Raman, Fourier transform infrared spectra and UV-vis absorbance spectroscopy) of such material was conducted. As a result, the uniform deposition of nanometer-sized Au NPs on the graphene sheets was observed. The Gr-Au/TiO 2 -SiO 2 exhibited excellent photocatalytic efficiency because of the reduction of electron-hole recombination. The Gr2%-Au0.1%/TiO 2 -SiO 2 composite had the highest photoactivity.

Who reads Enhancing the photocatalytic activity of TiO2 and TiO2–SiO2 by coupling with graphene–gold nanocomposites?

Author

Vu Duc Chinh; Irene Bavasso; Luca Di Palma; Anna Candida Felici; Marco Scarsella; Giorgio Vilardi; Maria Paola Bracciale; Nguyen Thuy Van

Publisher

Springer Science and Business Media LLC

Published

2021

Language

EN

Field

Materials Science (Physical Sciences)