Effect of Graphene-Gold Nanocomposites on the Photocatalytic Activity Of TiO\(_2\)

Vu Duc Chinh, Thuy Van Nguyen, Pham Thanh Binh, Chu Thi Thu Hien

Abstract


The synthesis of graphene (Gr) - gold (Au) nanoparticle (NP) composite was achieved using continuous ultraviolet wave exposure. The functional groups were investigated with FT-IR spectra. From the Raman spectra, D-band and G-band of graphene were identified. As a result, the uniform deposition of nanometer-sized Au NPs on the graphene sheets was observed from the field emission scanning electron microscope (FE-SEM) images. The photodegradation of methylene blue in aqueous solutions is studied using various photocatalysts, including neat TiO2, Gr/TiO2 and Gr-Au/TiO2 composites. The Gr weight ratio in this research is 2%. The Gr2%-Au0.1%/TiO2 composite had the highest photoactivity.


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DOI: https://doi.org/10.15625/0868-3166/30/1/14631 Display counter: Abstract : 226 views. PDF : 133 views.

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