In this article the concept of Soft semi W-D2 structure in soft topological spaces is introduced in different ways. There are many topological structures in soft topology but soft semi W-D2 topological structure is interesting and more practical because it is obtained from the mixture of two structures.
The photocatalytic degradation of organic waste using semiconductor photocatalyst under visible light has now received a great interest. The vertically aligned ZnO nanorod array (ZnO NRA) was grown on FTO substrate using hydrothermal method and its photocatalytic activity was also studied. The crystalline structure, morphology and optical properties of as synthesized ZnO NRA were studied by x-ray diffraction (XRD), field emission gun scanning electron microscope (FE-SEM), UV-Visible spectrophotometer and photoluminescence spectroscopy. The addition of small amount of hydrogen peroxide in dye solution inhibits the recombination of electrons and holes on the surface of ZnO nanorod; it also enhance the degradation rate. The average diameter and length of ZnO nanorods are 180 nm and 1.2 μm respectively. The photocatalytic dye degradation rate of ZnO NRA was increased with visible light in the presence of hydrogen peroxide. It was found the degradation efficiency of synthesized ZnO NRA was achieved up to 75% in 3 hour duration in the presence of hydrogen peroxide and visible light.