Details

Autor(en) / Beteiligte

• Liu, Shou-Heng
• Wei, Yu-Shao
• Lu, Jun-Sheng

Titel

Visible-light-driven photodegradation of sulfamethoxazole and methylene blue by Cu2O/rGO photocatalysts

Ist Teil von

• Chemosphere (Oxford), 2016-07, Vol.154, p.118-123

Ort / Verlag

England: Elsevier Ltd

Erscheinungsjahr

2016

Quelle

Elsevier ScienceDirect Journals

Beschreibungen/Notizen

• The cuprous oxide-reduced graphene oxide (Cu2O/rGO-x) composites were prepared via a simple wet-chemical method by using CuSO4·5H2O and graphene oxide as precursors and ascorbic acid as a reducing agent, respectively. These Cu2O/rGO-x were employed as photocatalysts for degrading emerging contaminants and organic dye pollutants (i.e., sulfamethoxazole (SMX) and methylene blue (MB)) under visible light. A variety of different spectroscopic and analytical techniques, such as X-ray diffraction, transmission electron microscopy, X-ray photoelectron spectroscopy, Raman scattering spectroscopy and UV-Visible spectroscopy were used to characterize the physical properties of photocatalysts. In the photodegrading experiments, it can be found that the Cu2O/rGO-80 photocatalyst has the superior visible-light response of ca. 50% removal efficiency of SMX within 120 min and 100% removal efficiency of MB within 40 min. These observations may be attributed the well-dispersed and visible-light-responsive Cu2O nanoparticles are supported on the surface of rGO sheets that can enhance absorption of visible light during photocatalysis. •A simple route is developed to prepare Cu2O/rGO photocatalysts.•Visible-light-sensitive degradation of SMX and MB by Cu2O/rGO-80 is enhanced.•Nanocomposites show superior photodegradation activity than pure Cu2O and rGO.•This may be due to the unique properties of well-dispersed Cu2O on rGO.