Synthesis of Three-dimensional Network-structured g-C3N4/rGO/Pd Composites with Excellent Visible-light Photocatalytic Performances
LOU Dongdong1, ZHANG Lisha1,2, WANG Haifeng1, CHEN Zhigang1
1 State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, Shanghai 201620; 2 College of Environmental Science and Engineering, Donghua University, Shanghai 201620
Abstract: Graphitic carbon nitride (g-C3N4) has been considered as an efficient metal-free semiconductor photocataltyst. To further improve its photocatalytic activity, we have prepared the three-dimensional network-structured g-C3N4/reduced graphene oxi-de (rGO)/palladium nanoparticles (Pd NPs) composites by the pyrolysis-hydrothermal two-step method. The composite consists of ultrathin sheets which are decorated with Pd NPs (diameter:~10 nm). g-C3N4/rGO/Pd NPs composite shows a broad absorption with an edge at ~460 nm and then an enhanced photoabsorption with the increase of wavelength (460—800 nm). The photocatalytic activity of g-C3N4/rGO/Pd NPs composites was measured by the degradation of RhB solution. Under the irradiation of visible-light (λ>400 nm), g-C3N4/rGO/Pd NPs composites can degrade 90% RhB in 140 min. In addition, the cycling experiment demonstrates that the composite possesses good photocatalytic stability. Therefore, g-C3N4/rGO/Pd NPs composites displays a potential as an efficient and stable photocatalyst for water-purification application.
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2017, Vol. 31 
