Effect of sodium tungstate dehydrate concentration on the growth of tungsten oxide layer grown on polyethylene terephthalate fiber and its photocatalytic in removal of RhB dye under visible light irradiation

Most of the studies on the use of semiconductor photocatalyst for decomposition of organic compounds involve colloidal particles. However, there is a need for the removal of particles from the slurry in the later stage, which is time consuming and costly. In order to rectify this problem, WO3 layer was deposited onto the PET fiber by sol-gel method. The investigated parameter in this work is the effects of sodium tungstate dehydrate concentration to achieve the optimum deposition of WO3 layer. It was achieved using 0.4 M. Next, the photocatalytic degradation of RhB organic dye was studied under visible light irradiation. It was observed that 24% of RhB dye was removed upon 150 min irradiation.