Abstract
The urge to purify refractory organic wastewater without secondary pollution is pushing forward the use of photocatalysis. However, the complicated preparation procedures and low visible-light utilization efficiencies of currently-employed photocatalytic materials limit its practical applications. Herein, we design a facile and cost-effective route for the controllable synthesis of hollow sphere shaped Bi2WO6/reduced graphene oxide (RGO) composites, which can efficiently degrade five organic wastewater, including rhodamine B, methyl orange, phenol, sulfamonomethoxine and sulfanilamide. The as-prepared Bi2WO6/RGO hybrids were well characterized and exhibited much advanced sunlight-driven photocatalytic activity as compared to that of the pure Bi2WO6. Such a high performance could be attributed to the enhanced light harvesting efficiency and improved charge separation efficiency in the composites. A possible formation mechanism of Bi2WO6/RGO composite was also proposed. This study highlights the rational design of novel natural-sunlight-responsive photocatalyst.
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