Abstract
BiFeO3/Reduced Graphene Oxide (BFO/RGO) composites have been fabricated by a simple hydrothermal method. The X-ray diffraction (XRD), scanning electron microscopy (SEM), Raman, and X-ray photoelectron spectroscopy (XPS) analysis reveal that graphene oxide was reduced in hydrothermal process and BFO/RGO composites were successfully synthesized. UV-visible absorption and photoluminescence properties show that the introduction of RGO can effectively reduce the recombination of photogenerated electron and hole pairs. Compared to the pristine BFO, the photocatalytic performance of BiFeO3 Graphene Oxide (BGO) composites is enhanced for the degradation of Methylene blue (MB) solution under visible light irradiation, and the result shows that the optimal amount of Graphene Oxide (GO) in the composites is 60 mg (BGO60). The excellent photocatalytic performance is mainly ascribed to improved light absorption, increased reactive sites, and the low recombination rate of electron-hole pairs. This work can provide more insights into designing advanced photocatalysts for wastewater treatment and environmental protection.
Highlights
In recent decades, with the rapid development of economic globalization, the energy crisis and environmental pollution have become the two main challenges that restrict the sustainable development of our society
We have systematically studied the influence of the addition amount of Graphene Oxide (GO) on the phase, morphology, and photocatalytic properties of the BiFeO3/Reduced Graphene Oxide (BFO/reduced graphene oxide (RGO)) composite photocatalysts
BFO/RGO composite photocatalysts have successfully been synthesized by a facile hydrothermal treatment
Summary
With the rapid development of economic globalization, the energy crisis and environmental pollution have become the two main challenges that restrict the sustainable development of our society. A large number of studies have reported that many photocatalytic effect semiconductor materials are combined with reduced graphene oxide [30], and can achieve enhancement in photocatalytic performance [31,32,33,34]. This strategy is of great interest to us. Little work has been done to systematically study the effect of graphene addition on the morphology and photocatalytic properties of BFO, and the corresponding mechanism is not clear.
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