A novel tungsten diselenide nanoparticles for enhanced photocatalytic performance of Cr (VI) reduction and ciprofloxacin (CIP).

Nanoparticles (NPs) fabrication is a significant approach to enhance the visible light response of photocatalysts, to realize inexpensive and more harmful compound removal, at larger scale. The poor electrons and holes separation capability and low light activity of bulk materials can be notably enhanced through developing NPs. From photocatalytic investigation, better performance was received in the tungsten diselenide (WSe) NPs than that in bare WSe, exhibiting the action of restrained recombination of charge carriers in the NPs. The photocatalytic Cr(VI) reduction efficiency of WSe NPs is 2.7 folds greater than that by bare WSe. On the other hand, the photocatalytic efficiency follows the order of nano WSe-3 > nano WSe-2 > nano WSe-1 > bare WSe, nano WSe-3 is nearly 2.7 folds greater than that of bare WSe. The results imply the fabrication of WSe NPs and it possesses improved visible light utilization. The proposed WSe NPs have merged with the three aspects of photocatalytic capability including the visible light activity, the valid separation of photo-response charge carriers and enough surface active sites owing to the nanoscale formed. This research endows conduct on the potential style of NPs for photo-response water environmental remediation.