SYNTHESIS OF WO3 NANORODS AND THEIRPHOTOCATALYTIC DEGRADATION OF ORGANICCONTAMINANTS

摘要

In this present investigation,we report a novel tungsten trioxide (WO3) nanorods were successfully synthesized bythe simple hydrothermal environment. The as-synthesized rod-like WO3 were characterized by various spectroscopicand analytical techniques such as X-ray diffraction (XRD) UV-vis spectroscopy analysis (UV-DRS). The structuralmorphology and their elements were confirmed by scanning electron microscopy (SEM) and energy-dispersive Xrayspectroscopy (EDX). It was found that the rod-like structure of WO3 was successfully confirmed by transmissionelectron microscopy (TEM). The synthesized WO3 exhibits an excellent photocatalytic activity which may beattributed to the improved charge separation and complete degradation of RhB dye solution within 70 min. Thephotocatalyst efficiency was further tested towards the effect of dye concentration and effect of different catalystweight. The involvement of .OH in the photocatalytic reaction was evidenced using radical quenching experimentwith employing different scavengers. A possible degradation mechanism was proposed for the semiconductors andpossible reasons for the enhancement of visible-light photocatalytic efficiency were discussed. This study couldprovide a new approach to construct a novel photocatalysts and a promising candidate catalyst for poisonouswastewater treatment in the near future.